JP2018526498A - Polypropylene composition - Google Patents

Abstract

Propylene homopolymer (HPP-1), propylene homopolymer (HPP-2), elastomeric propylene copolymer (PC-1), elastomeric propylene copolymer (PC-2), elastomeric ethylene copolymer (EC), filler ( A polypropylene composition (C1) comprising a heterophasic propylene composition (HC) comprising F). [Selection figure] None

Description

  The present invention is directed to a polypropylene composition, an automotive article comprising the polypropylene composition, and the use of the polypropylene composition in an automotive article.

  Polypropylene is a material of choice in many applications because it can be tailored to the specific purpose required. For example, heterophasic polypropylene is a combination of good stiffness and moderate impact strength behavior and is therefore widely used in the automotive industry (eg, bumper applications). Heterogeneous polypropylene contains a polypropylene matrix in which an amorphous phase is dispersed. The amorphous phase contains a copolymer rubber. Furthermore, the heterophasic polypropylene may contain some crystalline polyethylene. Today, the outer parts of automobiles are getting larger and therefore require good fluidity during injection molding. Another advantage of high flow materials is reduced cycle time. Furthermore, there is an increasing demand for reducing fuel consumption, so weight reduction is an urgent problem in the automotive industry. Weight reduction can be achieved by reducing the wall thickness or material density of the part. Higher rigidity is required to reduce the wall thickness. On the other hand, the material needs to have a high impact strength at normal and low temperatures in order to resist damage.

  Accordingly, it is an object of the present invention to provide a low density material exhibiting good stiffness and impact strength that is paired with good processability, especially in terms of high flowability.

The present invention is directed to a polypropylene composition (C1), and the polypropylene composition (C1)
(A) a heterophasic propylene composition (HC) comprising:
(A1) a propylene homopolymer (HPP-1) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of at least 100 g / 10 min, and 30-90 g / 10 min. A matrix (M) comprising a propylene homopolymer (HPP-2) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to a range of ISO 1133;
(A2) an elastomeric propylene copolymer (PC-1), an elastomeric propylene copolymer (PC-2), an elastomeric ethylene copolymer (EC) comprising units derived from ethylene and units derived from C _{4 to} C ₂₀ α-olefin; A heterophasic propylene composition (HC) comprising:
(B) It includes a filler (F).

The matrix (M) may further comprise a propylene homopolymer (HPP-3) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of 25 g / 10 min or less.

The heterophasic propylene composition (HC) is:
(A) a matrix (M) in an amount of at least 50 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (b) elastomer propylene copolymer (PC-1), elastomer propylene copolymer (PC-2), elastomer ethylene copolymer (PC-2) in a total amount of 50 wt% or less based on the weight of the heterophasic propylene composition (HC) ( EC) and are recognized.

Further, the heterophasic propylene composition (HC) is:
(A) an amount of propylene homopolymer (HPP-1) in the range of 25-60 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (b) an amount of propylene homopolymer (HPP-2) in the range of 5-30 wt%, based on the weight of the heterophasic propylene composition (HC),
And / or (c) propylene homopolymer (HPP-3) in an amount ranging from 0 to 20 wt% based on the weight of the heterophasic propylene composition (HC), and
And / or (d) an elastomeric propylene copolymer (PC-1) in an amount ranging from 2 to 15 wt%, based on the weight of the heterophasic propylene composition (HC),
And / or (e) an elastomeric propylene copolymer (PC-2) in an amount ranging from 2 to 15 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (f) an elastomeric ethylene copolymer (EC) in an amount ranging from 10 to 35 wt% based on the weight of the heterophasic propylene composition (HC).
Is recognized.

  Furthermore, it is recognized that the filler (F) is contained in an amount of 30 wt% or less based on the weight of the polypropylene composition (C1).

Furthermore, the present invention is directed to a polypropylene composition (C2), and the polypropylene composition (C2)
(A) heterophasic propylene copolymer (HECO-1),
(A1) a propylene homopolymer (HPP-1) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of at least 100 g / 10 min;
(A2) a heterophasic propylene copolymer (HECO-1) comprising an elastomeric propylene copolymer (PC-1);
(B) heterophasic propylene copolymer (HECO-2),
(B1) a propylene homopolymer (HPP-2) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 30-90 g / 10 min;
(B2) heterophasic propylene copolymer (HECO-2) comprising an elastomeric propylene copolymer (PC-2);
(C) an elastomer copolymer (EC) comprising units derived from ethylene and units derived from C _{4 to} C ₂₀ α-olefin.

The polypropylene composition (C2) may further comprise a propylene homopolymer (HPP-3) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of 25 g / 10 min or less.

Preferably, the polypropylene composition (C2) is
(A) a heterophasic propylene copolymer (HECO-1) in an amount of at least 25 wt% based on the weight of the polypropylene composition (C2);
And / or (b) an heterophasic propylene copolymer (HECO-2) in an amount ranging from 8 to 35 wt% based on the weight of the polypropylene composition (C2), and
And / or (c) an elastomeric ethylene copolymer (EC) in an amount ranging from 8 to 30 wt%, based on the weight of the polypropylene composition (C2);
And / or (d) filler (F) in an amount ranging from 1 to 30 wt% based on the weight of the polypropylene composition (C2), and / or
And / or (e) comprises propylene homopolymer (HPP-3) in an amount ranging from 0 to 20 wt% based on the weight of the polypropylene composition (C2).

Further, a polypropylene composition (C2) is recognized, wherein (a) the comonomer content of the xylene soluble fraction (XCS) of the heterophasic propylene copolymer (HECO-1) is defined as the heterophasic propylene copolymer (HECO-1). ) Based on the weight of 30) to 60 mol%,
And / or (b) the comonomer content of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2) is in the range of 30-60 mol% based on the weight of the heterophasic propylene copolymer (HECO-2).

Furthermore, a polypropylene composition (C2) is recognized, wherein (a) the comonomer content of the heterophasic propylene copolymer (HECO-1) ranges from 5 to 20 mol% based on the weight of the heterophasic propylene copolymer (HECO-1). And
And / or (b) the comonomer content of the heterophasic propylene copolymer (HECO-2) is in the range of 10-30 mol% based on the weight of the heterophasic propylene copolymer (HECO-2).

In addition, a polypropylene composition (C2) is recognized, where (a) the intrinsic viscosity measured according to ISO 1268-1 (135 ° C. in decalin) of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-1). (IV: intrinsic viscosity) is in the range of 1.5 to 3.0 dl / g,
And / or (b) the intrinsic viscosity (IV) measured according to ISO 1268-1 (135 ° C. in decalin) of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2) is 1.5 to 3.2 dl. / G.

Furthermore, a polypropylene composition (C1) or a polypropylene composition (C2) is recognized, wherein the elastomeric ethylene copolymer (EC) is
(A) Melt flow rate MFR ₂ (190 ° C., 2.16 kg) measured according to ISO 1133 in the range of 0.1-15 g / 10 min.
And / or (b) having a density in the range of 830-890 kg / cm ³ .

Furthermore, a polypropylene composition (C1) or a polypropylene composition (C2) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 18-50 g / 10 min is recognized.

  In a third aspect, the present invention is directed to an automotive article comprising a polypropylene composition (C1) and / or a polypropylene composition (C2).

  In a fourth aspect, the present invention is directed to the use of a polypropylene composition (C1) and / or a polypropylene composition (C2) in an automotive article.

  In the following, the present invention will be described in more detail.

Polypropylene composition (C1)
In the first aspect, the present invention is directed to a polypropylene composition (C1), and the polypropylene composition (C1)
(A) a heterophasic propylene composition (HC) comprising:
(A1) at least 100 g / 10 min, preferably at least 120 g / 10 min, more preferably at least 140 g / 10 min, even more preferably at least 150 g / 10 min, such as in the range of 100-200 g / 10 min, preferably 140-180 g / 10 min. A propylene homopolymer (HPP-1) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range, more preferably in the range of 150-170 g / 10 min, preferably less than 90 g / 10 min, preferably Is 80 g / 10 min or less, more preferably 75 g / 10 min or less, even more preferably 70 g / 10 min or less, even more preferably 65 g / 10 min or less, such as 30 to 90 g. Such as a range of 10 min, preferably in the range of 30-80 g / 10 min, more preferably in the range of 35-75 g / 10 min, even more preferably in the range of 40-70 g / 10 min, even more preferably in the range of 45-65 g / 10 min. A matrix (M) comprising a propylene homopolymer (HPP-2) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133;
(A2) an elastomeric propylene copolymer (PC-1), an elastomeric propylene copolymer (PC-2), an elastomeric ethylene copolymer (EC) comprising units derived from ethylene and units derived from C _{4 to} C ₂₀ α-olefin; A heterophasic propylene composition (HC) comprising:
(B) includes filler (F).

Further, the matrix (M) is 25 g / 10 min or less, preferably 20 g / 10 min or less, more preferably 15 g / 10 min or less, even more preferably 10 g / 10 min or less, such as a range of 1 to 25 g / 10 min, preferably 1 A melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of ˜20 g / 10 min, more preferably in the range of 3-15 g / 10 min, even more preferably in the range of 5-10 g / 10 min. The propylene homopolymer (HPP-3) may further be included.

  Preferably, the matrix (M) consists of propylene homopolymer (HPP-1) and propylene homopolymer (HPP-2); or propylene homopolymer (HPP-1) and propylene homopolymer (HPP-2) And propylene homopolymer (HPP-3).

  The polypropylene composition (C1) necessarily comprises a heterophasic propylene composition (HC). The heterophasic propylene composition (HC) is in an amount of at least 50 wt% based on the weight of the polypropylene composition (C1), preferably an amount of at least 60 wt%, more preferably an amount of 80 wt% or less, for example in the range of 50-99 wt%. It is recognized that it is preferably included in the range of 60 to 95 wt%, more preferably in the range of 70 to 95 wt%, and even more preferably in the range of 85 to 95 wt%.

  The polypropylene composition (C1) necessarily contains the filler (F). The filler (F) is preferably an amount of 30 wt% or less, preferably 20 wt% or less, more preferably 14 wt% or less, such as a range of 1 to 30 wt%, based on the weight of the polypropylene composition (C1). Is recognized to be included in the range of 5-20 wt%, more preferably in the range of 10-14 wt%.

  Only the heterophasic propylene composition (C3) and optionally the polymer carrier material (PCM) may be the polymer component in the polypropylene composition (C1), i.e. no other polymer component is present. Good.

  The polypropylene composition (C1) may be composed of a heterophasic propylene composition (C3), a filler (F), and optionally an additive (AD: additives).

  For example, the knowledge of the present invention is that the density of the polypropylene composition (C1) can be reduced without negatively affecting mechanical properties such as rigidity and impact resistance.

Polypropylene composition (C1) is, 995kg / cm ³ or less, preferably 990kg / cm ³ or less, more preferably 985kg / cm ³ or less, such as the range of 975~995kg / cm ^3, preferably 975~990kg / cm ³ It is recognized that it has a density measured according to ISO 1183-187, more preferably in the range of 975 to 985 kg / cm ³ .

  Furthermore, the polypropylene composition (C1) has a bending of at least 1400 MPa, preferably at least 1500 MPa, more preferably at least 1600 MPa, such as in the range of 1400-1800 MPa, preferably in the range of 1500-1700 MPa, more preferably in the range of 1600-1700 MPa. It is recognized that it has a coefficient.

Furthermore, the polypropylene composition (C1) is at least 15 g / 10 min, preferably at least 18 g / 10 min, more preferably at least 20 g / 10 min, such as in the range of 15-100 g / 10 min, preferably in the range of 18-50 g / 10 min. It is recognized that even more preferably it has a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 20-40 g / 10 min.

  All components used for the preparation of this composition, ie the propylene composition (C1), are known. Therefore, the preparation of those components is also well known.

  A polypropylene composition (C1) can be prepared by adding heterophasic propylene (HECO), filler (F), and optionally an additive (AD) to an extruder and extruding them.

Heterogeneous propylene composition (HC)
The expression “heterophasic” indicates that at least one elastomeric copolymer is (finely) dispersed in the matrix. In other words, at least one elastomeric copolymer forms an inclusion in the matrix. That is, the matrix contains (finely) dispersed inclusions that are not part of the matrix, the inclusions containing at least one elastomeric copolymer. The term “inclusion” preferably indicates that the matrix and inclusion form different phases within the heterophasic propylene copolymer, said inclusion being viewed by a high resolution microscope, such as an electron microscope or a scanning force microscope, for example. Can do.

  The matrix (M) of the heterophasic propylene composition (HC) comprises a propylene homopolymer (HPP-1), a propylene homopolymer (HPP-2) and optionally a propylene homopolymer (HPP-3), possibly A composite structure is formed in the final composition. In other words, the propylene homopolymer (HPP-1), the propylene homopolymer (HPP-2) and optionally the propylene homopolymer (HPP-3) form a continuous phase while the elastomeric propylene copolymer ( PC-1), elastomeric propylene copolymer (PC-2), and elastomeric ethylene copolymer (EC) form an inclusion dispersed in this continuous phase.

  Preferably, the heterophasic propylene composition (HC) comprises the matrix (M) in an amount of at least 50 wt%, preferably at least 55 wt%, more preferably at least 60 wt%, based on the weight of the heterophasic propylene composition (HC). It is contained in an amount, for example, in the range of 50 to 80 wt%, preferably in the range of 55 to 75 wt%, more preferably in the range of 60 to 70 wt%.

  The matrix (M) of the heterophasic propylene composition (HC) comprises a propylene homopolymer (HPP-1) in an amount of at least 25 wt%, preferably in an amount of at least 30 wt%, based on the weight of the heterophasic propylene composition (HC). Preferably in an amount of at least 35 wt%, even more preferably in an amount of at least 40 wt%, such as in the range of 25-60 wt%, preferably in the range of 30-55 wt%, more preferably in the range of 35-50 wt%, even more preferably It is recognized that it is contained in the range of 40 to 45 wt%.

  Further, the matrix (M) of the heterophasic propylene composition (HC) comprises the propylene homopolymer (HPP-2) in an amount of 30 wt% or less, preferably 25 wt% or less based on the weight of the heterophasic propylene composition (HC). It is recognized that it is contained in an amount of preferably 20 wt% or less, such as in the range of 5-30 wt%, preferably in the range of 6-25 wt%, more preferably in the range of 10-20 wt%.

  Propylene homopolymer (HPP-3) is not an essential compound of the polypropylene composition (C). However, when the propylene homopolymer (HPP-3) is included in the matrix (M) of the heterophasic propylene composition (HC), the propylene homopolymer (HPP-3) is 20 wt based on the weight of the heterophasic propylene composition (HC). It is recognized that it is present in an amount of no more than%, preferably no more than 15 wt%, such as in the range of 0-20 wt%, preferably in the range of 5-20 wt%, more preferably in the range of 10-15 wt%.

  Preferably, the heterophasic propylene composition (HC) comprises an elastomeric propylene copolymer (PC-1), an elastomeric propylene copolymer (PC-2), and an elastomeric ethylene copolymer (EC) based on the weight of the heterophasic propylene composition (HC). A total amount of 50 wt% or less, preferably 45 wt% or less, more preferably 40 wt% or less, such as a range of 20-50 wt%, preferably a range of 25-45 wt%, more preferably 30-40 wt% In the range of%.

  The heterophasic propylene composition (HC) comprises the elastomeric propylene copolymer (PC-1) in an amount of at least 1 wt%, preferably at least 2 wt%, more preferably at least 3 wt%, based on the weight of the heterophasic propylene composition (HC). Even more preferably in an amount of at least 5 wt%, such as in the range of 1-20 wt%, preferably in the range of 2-15 wt%, more preferably in the range of 5-15 wt%, even more preferably in the range of 5-10 wt%. It is recognized to include in scope.

  Further, the heterophasic propylene composition (HC) comprises an elastomeric propylene copolymer (PC-2) in an amount of 20 wt% or less, preferably 15 wt% or less, more preferably 10 wt%, based on the weight of the heterophasic propylene composition (HC). It is recognized that it is included in an amount of less than or equal to%, such as in the range of 1-20 wt%, preferably in the range of 2-15 wt%, more preferably in the range of 5-10 wt%.

  Further, the heterophasic propylene composition (HC) comprises an elastomeric ethylene copolymer (EC) in an amount of 35 wt% or less, preferably 30 wt% or less, more preferably 25 wt% or less, based on the weight of the heterophasic propylene composition (HC). It is recognized that the amount is preferably in the range of 15-30 wt%, more preferably in the range of 18-25 wt%, such as in the range of 10-35 wt%.

The heterophasic propylene composition (HC) necessarily comprises both propylene homopolymer (HPP-1) and propylene homopolymer (HPP-2). Both propylene homopolymer (HPP-1) and propylene homopolymer (HPP-2) satisfy inequality (Ia), preferably inequality (Ib), more preferably inequality (Ic), and even more preferably inequality (Id). It is recognized.
Co (HPP-1) / Co (HPP-2) ≧ 0.8 (Ia)
40 ≧ Co (HPP-1) / Co (HPP-2) ≧ 0.8 (Ib)
20 ≧ Co (HPP-1) / Co (HPP-2) ≧ 1.5 (Ic)
10 ≧ Co (HPP-1) / Co (HPP-2) ≧ 2.0 (Id)
Where Co (HPP-1) is the amount of propylene homopolymer (HPP-1) in wt% based on the weight of the heterophasic propylene composition (HC), and Co (HPP-2) is the heterophasic propylene composition (HC). ) Based on the weight of propylene homopolymer (HPP-2) in wt%.

As indicated above, propylene homopolymer (HPP-3) is an optional component of the heterophasic propylene composition (HC). When propylene homopolymer (HPP-3) is present in the heterophasic propylene composition (HC), both propylene homopolymer (HPP-1) and propylene homopolymer (HPP-3) are inequality (IIa), preferably inequality. It is recognized that (IIb), more preferably inequality (IIc), even more preferably inequality (IId) is satisfied.
Co (HPP-1) / Co (HPP-3) ≧ 0.8 (IIa)
40 ≧ Co (HPP-1) / Co (HPP-3) ≧ 0.8 (IIb)
20 ≧ Co (HPP-1) / Co (HPP-3) ≧ 1.5 (IIc)
10 ≧ Co (HPP-1) / Co (HPP-3) ≧ 2.0 (IId)
Where Co (HPP-1) is the amount of propylene homopolymer (HPP-1) in wt% based on the weight of the heterophasic propylene composition (HC), and Co (HPP-3) is the heterophasic propylene composition (HC). ) Based on the weight of propylene homopolymer (HPP-3) in wt%.

Preferably, the homopolymer (HPP-1) and propylene homopolymer (HPP-2) of the heterophasic propylene composition (HC) are both inequality (IIIa), preferably inequality (IIIb), more preferably inequality (IIIc), Even more preferably, inequality (IIId) is satisfied.
MFR (HPP-1) -MFR (HPP-2) ≧ 50 (IIIa)
170 ≧ MFR (HPP-1) −MFR (HPP-2) ≧ 50 (IIIb)
150 ≧ MFR (HPP-1) −MFR (HPP-2) ≧ 70 (IIIc)
125 ≧ MFR (HPP-1) −MFR (HPP-2) ≧ 90 (IIId)
Here, MFR (HPP-1) is the melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of propylene homopolymer (HPP-1), and MFR (HPP-2) is propylene homopolymer (HPP-2) measured melt flow rate _MFR 2 (230 ℃, 2.16kg) according ISO 1133 of a.

Preferably, the homopolymer (HPP-1) and propylene homopolymer (HPP-3) of the heterophasic propylene composition (HC) are both inequality (IVa), preferably inequality (IVb), more preferably inequality (IVc), Even more preferably, the inequality (IVd) is satisfied.
MFR (HPP-1) -MFR (HPP-3) ≧ 75 (IVa)
190 ≧ MFR (HPP-1) −MFR (HPP-3) ≧ 75 (IVb)
170 ≧ MFR (HPP-1) −MFR (HPP-3) ≧ 100 (IVc)
165 ≧ MFR (HPP-1) −MFR (HPP-3) ≧ 140 (IVd)
Where MFR (HPP-1) is the melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of propylene homopolymer (HPP-1), and MFR (HPP-3) is propylene homopolymer (HPP-3) a melt flow rate _MFR 2 (230 ℃, 2.16kg) measured according ISO 1133 of a.

  The matrix (M) of the heterophasic propylene composition (HC) is multimodal in view of molecular weight, especially bimodal when propylene homopolymer (HPP-3) is not included, or propylene homopolymer ( It is recognized that it is trimodal when HPP-3) is included. The expressions “multimodal”, “bimodal” or “trimodal” as used throughout the present invention indicate the mode of the polymer, ie the shape of its molecular weight distribution curve, which is a function of molecular weight. It is a graph of a molecular weight fraction.

  It is recognized that the heterophasic propylene composition (HC) is nucleated, in particular alpha nucleated.

  Thus, it is recognized that the heterophasic propylene composition (HC) contains an α nucleating agent. Preferably, the heterophasic propylene composition (HC) does not contain a beta nucleating agent.

The α nucleating agent is preferably selected from the group consisting of:
(I) salts of mono- and polycarboxylic acids, such as sodium benzoate or aluminum tert-butylbenzoate, and (ii) dibenzylidene sorbitol (eg, 1,3: 2,4 dibenzylidene sorbitol) and C _1- C ₈ -alkyl substituted dibenzylidene sorbitol derivatives such as methyl dibenzylidene sorbitol, ethyl dibenzylidene sorbitol, or dimethyl dibenzylidene sorbitol (eg, 1,3: 2,4 di (methylbenzylidene) sorbitol), or substituted nonitol derivatives, For example, 1,2,3, -trideoxy-4,6: 5,7-bis-O-[(4-propylphenyl) methylene] -nonitol, and (iii) salts of diesters of phosphoric acid, such as sodium 2,2′-methylenebis (4,6, -di-tert-butylphenyl) phosphate or aluminum-hydroxy-bis [2,2′-methylene-bis (4,6-di-tert-butylphenyl) phosphate] And (iv) vinylcycloalkane polymers or vinylalkane polymers, and (v) mixtures thereof.

Preferably, the alpha nucleating agent contained in the heterophasic propylene composition (HC) is a vinylcycloalkane polymer and / or a vinylalkane polymer, more preferably a vinylcycloalkane polymer, such as a vinylcyclohexane (VCH) polymer. Vinylcyclohexane (VCH) polymers are particularly preferred as α nucleating agents. The amount of vinylcycloalkane polymer and / or vinylalkane polymer, for example vinylcyclohexane (VCH) polymer, such as vinylcyclohexane (VCH), in the heterophasic propylene composition (HC) is 500 ppm or less, preferably 200 ppm or less. It is recognized that it is more preferably 100 ppm or less, for example, a range of 0.1 to 500 ppm, preferably a range of 0.5 to 200 ppm, more preferably a range of 1 to 100 ppm. Furthermore, it is recognized that vinyl cycloalkane polymers and / or vinyl alkane polymers are introduced into heterophasic propylene compositions (HC) by BNT technology. With regard to BNT technology, reference is made to international applications WO 99/24478, WO 99/24479, and in particular WO 00/68315. According to this technique, a catalyst system, preferably a Ziegler-Natta procatalyst, can be modified by polymerizing vinyl compounds in the presence of a catalyst system comprising a special Ziegler-Natta procatalyst, an external donor, and a cocatalyst. The vinyl compound has the following formula:
_{^{CH 2 = CH-CHR 3 R}} 4
R ³ and R ⁴ together form a 5- or 6-membered saturated, unsaturated or aromatic ring, or independently represent an alkyl group containing 1 to 4 carbon atoms, and a heterophasic propylene composition (HC) Or a modified catalyst is used for the preparation of at least one of its components. The polymerized vinyl compound acts as an α nucleating agent. The weight ratio of vinyl compound to solid catalyst component in the catalyst modification step is preferably at most 5 (5: 1), more preferably at most 3 (3: 1), for example 0.5 (1: 2) to 2 (2 : 1).

  Such nucleating agents are commercially available and are described, for example, in Hans Zweifel's “Plastic Additives Handbook”, 5th edition, 2001 (pp. 967-990).

  The heterophasic propylene composition (HC) comprises different components: propylene homopolymer (HPP-1), propylene homopolymer (HPP-2), optionally propylene homopolymer (HPP-3), and elastomeric propylene copolymer (PC). -1), an elastomeric propylene copolymer (PC-2), and an elastomeric ethylene copolymer (EC). Alternatively, the heterophasic propylene composition (HC) can be produced in a sequential step process with multiple reactors operating in different reaction conditions in a continuous configuration. Alternatively, the heterophasic propylene composition (HC) comprises a heterophasic propylene copolymer (HECO-1), a heterophasic propylene copolymer (HECO-2), an elastomeric ethylene copolymer (EC), and optionally a propylene homopolymer (HPP- It can also be obtained by mixing 3). For the definition of heterophasic propylene copolymer (HECO-1) and heterophasic propylene copolymer (HECO-2), reference is made to propylene composition (C2). In other words, propylene homopolymer (HPP-1) and elastomeric propylene copolymer (PC-1) can be introduced into heterophasic propylene composition (HC) in the form of heterophasic propylene copolymer (HECO-1), while propylene homopolymer (HPP -2) and the elastomeric propylene copolymer (PC-2) can be introduced into the heterophasic propylene composition (HC) in the form of a heterophasic propylene copolymer (HECO-2).

Propylene homopolymer (HPP-1)
Propylene homopolymer (HPP-1) is a propylene homopolymer and provides sufficient rigidity and strength.

  The expression “propylene homopolymer” relates to a polypropylene consisting essentially of more than 99.7 mol%, even more preferably at least 99.8 mol% of propylene units. In a preferred embodiment, only propylene units are detectable in the propylene homopolymer.

It is recognized that propylene homopolymer (HPP-1) has a relatively high melt flow rate. The propylene homopolymer (HPP-1) is at least 100 g / 10 min, preferably at least 120 g / 10 min, more preferably at least 140 g / 10 min, even more preferably at least 150 g / 10 min, such as in the range of 100-200 g / 10 min, preferably It is recognized that it has a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 140-180 g / 10 min, even more preferably in the range of 150-170 g / 10 min.

  Further, the propylene homopolymer (HPP-1) is less than 5.0 wt%, preferably less than 3.0 wt%, even more preferably less than 2.5 wt%, such as in the range of 0.5 to 5.0, preferably 1 It is recognized that it has a low temperature xylene soluble component content (XCS) in the range of 0.0-3.0 wt%, and even more preferably in the range of 1.0-2.5 wt%.

Elastomer propylene copolymer (PC-1)
The elastomeric propylene copolymer (PC-1) is a unit that may be derived from (i) propylene and (ii) ethylene and / or at least another C ₄ to C ₂₀ α-olefin, such as C ₄ to C ₁₀ α-olefin, More preferably (i) propylene and (ii) ethylene and / or at least another α-olefin selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene and 1-octene. It comprises units that can be derived, preferably consisting of them. The elastomeric propylene copolymer (PC-1) may further contain units derived from conjugated or non-conjugated dienes such as butadiene, but the elastomeric copolymer may contain (i) propylene and (ii) ethylene and / or C _4. It is preferable that it consists only of units that can be derived from C ₂₀ α-olefin. Non-conjugated dienes suitable when used are linear and branched acyclic dienes such as 1,4-hexadiene, 1,5-hexadiene, 1,6-octadiene, 5-methyl-1,4-hexadiene. 3,7-dimethyl-1,6-octadiene, 3,7-dimethyl-1,7-octadiene, and mixed isomers of dihydromyrcene and dihydroocimene, and single ring alicyclic dienes such as 1,4 -Cyclohexadiene, 1,5-cyclooctadiene, 1,5-cyclododecadiene, 4-vinylcyclohexene, 1-allyl-4-isopropylidenecyclohexane, 3-allylcyclopentene, 4-cyclohexene, and 1-isopropenyl- 4- (4-butenyl) cyclohexane and the like. Also suitable are polycyclic alicyclic fused and bridged ring dienes, which are tetrahydroindene, methyltetrahydroindene, dicyclopentadiene, bicyclo (2,2,1) hepta-2,5-diene, 2-methylbicycloheptadiene. And alkenyl, alkylidene, cycloalkenyl, and cycloalkylidene norbornene, such as 5-methylene-2-norbornene, 5-isopropylidene norbornene, 5- (4-cyclopentenyl) -2-norbornene, and 5-cyclohexylidene-2 -Including norbornene and the like. Preferred non-conjugated dienes are 5-ethylidene-2-norbornene, 1,4-hexadiene, and dicyclopentadiene.

  The elastomeric propylene copolymer (PC-1) thus comprises at least units that can be derived from propylene and units that can be derived from ethylene and / or further α-olefins as defined in the preceding paragraph. However, the elastomeric propylene copolymer (PC-1) is defined in units that can be derived solely from propylene, units that can be derived from ethylene, and optionally in the preceding paragraph such as conjugated dienes such as butadiene or 1,4-hexadiene. It is particularly preferable to include a unit that can be derived from a nonconjugated diene that has been produced. Accordingly, ethylene propylene non-conjugated diene monomer polymer and / or ethylene propylene polymer (EPR) is preferred as the elastomer propylene copolymer (PC-1), and the latter is most preferred.

  The elastomeric propylene copolymer (PC-1) contains at least 30 mol of comonomer units, that is, units contained in addition to the units derived from propylene, preferably units derived from ethylene, based on the weight of the elastomeric propylene copolymer (PC-1). It is recognized that it comprises an amount of%, preferably an amount of at least 40 mol%, such as in the range of 30-80 mol%, preferably in the range of 40-70 mol%, more preferably in the range of 45-60 mol%.

Propylene homopolymer (HPP-2)
Propylene homopolymer (HPP-2) is a propylene homopolymer, which also contributes to sufficient stiffness and strength.

The propylene homopolymer (HPP-2) is 90 g / 10 min or less, preferably 80 g / 10 min or less, more preferably 75 g / 10 min or less, even more preferably 70 g / 10 min or less, even more preferably 65 g / 10 min or less, such as 30 to 90 g / 10 min range, etc., preferably 30-80 g / 10 min range, more preferably 35-75 g / 10 min range, even more preferably 40-70 g / 10 min range, even more preferably 45-65 g / 10 min. It is recognized that it has a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to the range ISO 1133.

  In other words, it is recognized that propylene homopolymer (HPP-2) has a lower melt flow rate than propylene homopolymer (HPP-1).

  Further, the propylene homopolymer (HPP-2) is less than 5.0 wt%, preferably less than 3.5 wt%, even more preferably less than 3.0 wt%, such as in the range of 0.5 to 5.0, preferably 1 It is recognized that it has a low temperature xylene soluble component content (XCS) in the range of 0.0-3.5 wt%, and even more preferably in the range of 1.0-2.5 wt%.

Elastomer propylene copolymer (PC-2)
The elastomeric propylene copolymer (PC-2) is a unit that can be derived from (i) propylene and (ii) ethylene and / or at least another C ₄ to C ₂₀ α-olefin, such as C ₄ to C ₁₀ α-olefin, More preferably (i) propylene and (ii) ethylene and / or at least another α-olefin selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene and 1-octene. It comprises units that can be derived, preferably consisting of them. The elastomeric propylene copolymer (PC-2) may further contain units derived from conjugated or non-conjugated dienes such as butadiene, but the elastomeric copolymer may contain (i) propylene and (ii) ethylene and / or C _4. It is preferable that it consists only of units that can be derived from C ₂₀ α-olefin. Non-conjugated dienes suitable when used are linear and branched acyclic dienes such as 1,4-hexadiene, 1,5-hexadiene, 1,6-octadiene, 5-methyl-1,4-hexadiene. 3,7-dimethyl-1,6-octadiene, 3,7-dimethyl-1,7-octadiene, and mixed isomers of dihydromyrcene and dihydroocimene, and single ring alicyclic dienes such as 1,4 -Cyclohexadiene, 1,5-cyclooctadiene, 1,5-cyclododecadiene, 4-vinylcyclohexene, 1-allyl-4-isopropylidenecyclohexane, 3-allylcyclopentene, 4-cyclohexene, and 1-isopropenyl- 4- (4-butenyl) cyclohexane and the like. Also suitable are polycyclic alicyclic fused and bridged ring dienes, which are tetrahydroindene, methyltetrahydroindene, dicyclopentadiene, bicyclo (2,2,1) hepta-2,5-diene, 2-methylbicycloheptadiene. And alkenyl, alkylidene, cycloalkenyl, and cycloalkylidene norbornene, such as 5-methylene-2-norbornene, 5-isopropylidene norbornene, 5- (4-cyclopentenyl) -2-norbornene, and 5-cyclohexylidene-2 -Including norbornene and the like. Preferred non-conjugated dienes are 5-ethylidene-2-norbornene, 1,4-hexadiene, and dicyclopentadiene.

  Thus, the elastomeric propylene copolymer (PC-2) comprises at least units that can be derived from propylene and units that can be derived from ethylene and / or further α-olefins as defined in the preceding paragraph. However, elastomeric propylene copolymer (PC-2) is defined in units that can be derived solely from propylene, units that can be derived from ethylene, and optionally in the preceding paragraphs such as conjugated dienes such as butadiene or 1,4-hexadiene. It is particularly preferable to include a unit that can be derived from a nonconjugated diene that has been produced. Accordingly, ethylene propylene non-conjugated diene monomer polymer and / or ethylene propylene polymer (EPR) is preferred as the elastomer propylene copolymer (PC-2), and the latter is most preferred.

  The elastomeric propylene copolymer (PC-2) comprises at least 30 mol% of comonomer units, ie units contained in addition to the units derived from propylene, preferably units derived from ethylene, based on the weight of the elastomeric propylene copolymer (PC-2). It is recognized that the amount is preferably at least 40 mol%, such as in the range 30-80 mol%, preferably in the range 40-70 mol%, more preferably in the range 45-60 mol%.

  It is recognized that the elastomeric propylene copolymer (PC-1) and the elastomeric propylene copolymer (PC-2) are different from each other. However, the elastomeric propylene copolymer (PC-1) and the elastomeric propylene copolymer (PC-2) may be identical to each other.

Propylene homopolymer (HPP-3)
Propylene homopolymer (HPP-3) is a propylene homopolymer (HPP-1) and propylene to counter the potential reduction in stiffness and strength caused by lower filler levels in composition (C1). It can be applied in addition to the homopolymer (HPP-2).

The propylene homopolymer (HPP-3) is 25 g / 10 min or less, preferably 20 g / 10 min or less, more preferably 15 g / 10 min or less, even more preferably 10 g / 10 min or less, such as a range of 1 to 25 g / 10 min. in the range of from 1 to 20 g / 10min, more preferably from 3 to 15 g / 10min, still more preferably a melt flow rate _MFR 2 (230 ° C. as measured in accordance with ISO 1133 in the range of 5 to 10 g / 10min, 2.16 kg ).

  Further, the propylene homopolymer (HPP-3) is at least 1800 MPa, preferably at least 1900 MPa, more preferably at least 2000 MPa, such as in the range of 1800 to 2500 MPa, preferably in the range of 1900 to 2300 MPa, more preferably in the range of 2000 to 2200 MPa. It is recognized that it has a bending coefficient of

  The propylene homopolymer (HPP-3) may have a lower melt flow rate than the propylene homopolymer (HPP-1) and a lower melt flow rate than the propylene homopolymer (HPP-2).

  Further, the propylene homopolymer (HPP-3) is preferably less than 5.0 wt%, preferably less than 3.5 wt%, even more preferably less than 3.0 wt%, such as in the range of 0.5 to 5.0 wt%. Is recognized to have a low temperature xylene soluble component content (XCS) in the range of 1.0 to 3.5 wt%, and even more preferably in the range of 1.0 to 2.5 wt%.

Elastomer ethylene copolymer (EC)
Elastomeric ethylene copolymers (EC) are (chemically) different from elastomeric propylene copolymers (PC-1) and elastomeric propylene copolymers (PC-2).

Elastomeric ethylene copolymers (EC) are units derived from ethylene and units derived from at least another C ₄ to C ₂₀ α-olefin, such as C ₄ to C ₁₀ α-olefin, more preferably from ethylene. The units obtained and at least another, selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene, wherein 1-butene and / or 1-octene are particularly preferred α-olefins It comprises units that can be derived, preferably consisting of them.

  Thus, the elastomeric ethylene copolymer (EC) comprises at least units that can be derived from ethylene and units that can be derived from further α-olefins as defined in the preceding paragraph. However, elastomeric ethylene copolymers (EC) can be derived from units that can be derived solely from ethylene and units that can be derived from additional α-olefins such as 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene. It is particularly preferred that It is particularly preferred that the elastomeric ethylene copolymer (EC) comprises only units that can be derived from ethylene and units selected from 1-butene, 1-hexene and 1-octene. The elastomeric ethylene copolymer (EC) comprises units that can be derived solely from ethylene, units that can be derived from 1-octene, or units that can be derived from ethylene and units that can be derived from 1-butene. It is recognized that it contains.

  As shown above, the matrix (M) of the heterophasic propylene composition (HC) comprises (finely) an elastomeric propylene copolymer (PC-1), an elastomeric propylene copolymer (PC-2), and an elastomeric ethylene copolymer (EC). Includes distributed inclusions. The elastomeric ethylene copolymer (EC) may form inclusions (finely dispersed) in the elastomeric propylene copolymer (PC-1) and the elastomeric propylene copolymer (PC-2).

The elastomeric ethylene copolymer (EC) is 15 g / 10 min or less, preferably 10 g / 10 min or less, more preferably 8.0 g / 10 min or less, even more preferably 6.0 g / 10 min or less, such as 0.1 to 15 g / 10 min. Measured according to ISO 1133 in the range of 0.5-10 g / 10 min, more preferably in the range of 1.0-8.0 g / 10 min, even more preferably in the range of 1.0-6.0 g / 10 min. It is recognized that it has a measured melt flow rate MFR ₂ (190 ° C., 2.16 kg).

Elastomeric ethylene copolymer (EC) is, 890 kg / cm ³ or less, preferably 0.880kg / cm ³ or less, more preferably 0.875kg / cm ³ or less, such as the range of 830~890kg / cm ^3, preferably 840～ range of 0.880kg / cm ^3, it is recognized that more preferably from 850~875kg / cm ^3, even more preferably having a density measured according ISO 1183-187 in the range of 860~875kg / cm ³ .

  The ethylene content of the elastomeric ethylene copolymer (EC) is at least 70 mol%, preferably at least 80 mol%, such as in the range 70-98 mol%, preferably in the range 80-95 mol%, more preferably 82-92 mol%. Be recognized.

Filler (F)
As a further requirement, the polypropylene composition (C1) requires the presence of filler (F). Thus, the filler (F) is not considered to be included in the additive (AD) defined in more detail below.

  Preferably, the filler (F) is a mineral filler. It is recognized that the filler (F) is phyllosilicate, mica, or wollastonite. Even more preferably, the filler (F) is selected from the group consisting of mica, wollastonite, kaolinite, smectite, montmorillonite, and talc. Most preferably, the filler (F) is talc.

The filler (F) has a median particle size (D ₅₀ ) in the range of 0.8 to 20 μm and a top cut particle size (D ₉₅ ) in the range of 1.0 to 40 μm, preferably 1.0 to 10 μm. Particle size (D ₅₀ ) and top cut particle size (D ₉₅ ) in the range of 2.0-30 μm, more preferably median particle size (D ₅₀ ) in the range of 1.2-5.0 μm and 3.0-10 μm It is recognized that it has a top cut particle size (D ₉₅ ) of

Typically, the filler (F) is less than ^{20 m} 2 / g, more preferably less than ^{15 m} 2 / g, for example, a range of 1-20 m ² / g, preferably in the range of 5 to 15 m ² / g, analysis adsorbate As having a surface area measured according to the generally known BET method with N ₂ gas.

  The filler (F) that satisfies these requirements is preferably an anisotropic mineral filler (F) such as talc, mica, and wollastonite. Particularly preferred is talc.

  Filler (F) is a state of the art and is a commercially available product.

Additive (AD)
In addition to the heterophasic propylene composition (HC) and the filler (F), the polypropylene composition (C1) may contain an additive (AD). Typical additives include acid scavengers, antioxidants, colorants, light stabilizers, plasticizers, slip agents, anti-scratch agents, dispersants, processing aids, lubricants, dyes, and antistatic agents. . As indicated above, filler (F) is not considered an additive.

  Such additives are commercially available and are described, for example, in Hans Zweifel's “Plastic Additives Handbook”, 6th edition, 2009 (pages 1141-1190).

  Furthermore, the term “additive (AD)” according to the invention also includes carrier materials, in particular polymer carrier materials (PCM), in particular polypropylene carrier materials.

  Preferably, the polypropylene composition (C1) is 0.1 to 20 wt%, preferably 0.5 to 15 wt%, more preferably 0.5 to 10 wt%, even more based on the weight of the polypropylene composition (C1). Preferably 0.5 to 5.0 wt% of additive (AD) is included.

  In a preferred embodiment, the polypropylene composition (C1) comprises an antioxidant, acid scavenger, anti-scratch agent, mold release agent, lubricant, and UV stabilizer.

Polymer carrier material (PCM)
Preferably, the polypropylene composition (C1) is a polymer or polymers included in the above-described polymer polypropylene composition (C1), ie, propylene homopolymer (HPP-1), propylene homopolymer (HPP-2), elastomer Additional polymer (s) different from propylene copolymer (PC-1), elastomeric propylene copolymer (PC-2), elastomeric ethylene copolymer (EC), and optionally propylene homopolymer (HPP-3), are added to the polypropylene composition. Based on the weight of the product (C1), it does not contain more than 10 wt%, preferably more than 5 wt%, more preferably more than 3 wt%. When additional polymers are present, such polymers are typically a polymer carrier material (PCM) for the additive.

  In the polypropylene composition (C1), the polymer carrier material (PCM) is added in an amount of 10 wt% or less, preferably 5.0 wt% or less, more preferably 3.0 wt% or less, based on the weight of the polypropylene composition (C1). It is recognized that the amount is preferably in the range of 0.3 to 5.0 wt%, even more preferably in the range of 0.5 to 3.0 wt%, such as in the range of 0 to 10.0 wt%.

The polymer carrier material (PCM) is a carrier polymer to ensure a uniform distribution in the polypropylene composition (C1) relative to other additives. The polymer carrier material (PCM) is not limited to a specific polymer. The polymer support material (PCM) is an ethylene homopolymer, an ethylene copolymer obtained from ethylene and an α-olefin comonomer such as a C ₃ to C ₈ α-olefin comonomer, a propylene homopolymer, and / or propylene and such as ethylene and / or Alternatively, it may be a propylene copolymer obtained from an α-olefin comonomer such as a C ₄ to C ₈ α-olefin comonomer.

Polypropylene composition (C2)
In the second aspect, the present invention is directed to a polypropylene composition (C2), and the polypropylene composition (C2)
(A) heterophasic propylene copolymer (HECO-1),
(A1) at least 100 g / 10 min, preferably at least 120 g / 10 min, more preferably at least 140 g / 10 min, even more preferably at least 150 g / 10 min, such as in the range of 100-200 g / 10 min, preferably 140-180 g / 10 min. A propylene homopolymer (HPP-1) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range, even more preferably in the range of 150-170 g / 10 min;
(A2) a heterophasic propylene copolymer (HECO-1) comprising an elastomeric propylene copolymer (PC-1);
(B) heterophasic propylene copolymer (HECO-2),
(B1) 90 g / 10 min or less, preferably 80 g / 10 min or less, more preferably 75 g / 10 min or less, even more preferably 70 g / 10 min or less, even more preferably 65 g / 10 min or less, such as a range of 30 to 90 g / 10 min. Measured according to ISO 1133, preferably in the range of 30-80 g / 10 min, more preferably in the range of 35-75 g / 10 min, even more preferably in the range of 40-70 g / 10 min, even more preferably in the range of 45-65 g / 10 min. A propylene homopolymer (HPP-2) having a measured melt flow rate MFR ₂ (230 ° C., 2.16 kg);
(B2) heterophasic propylene copolymer (HECO-2) comprising an elastomeric propylene copolymer (PC-2);
(C) an elastomer copolymer (EC) comprising units derived from ethylene and units derived from C _{4 to} C ₂₀ α-olefin.

The polypropylene composition (C2) is further 25 g / 10 min or less, preferably 20 g / 10 min or less, more preferably 15 g / 10 min or less, even more preferably 10 g / 10 min or less, such as a range of 1 to 25 g / 10 min. Melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 1-20 g / 10 min, more preferably in the range of 3-15 g / 10 min, even more preferably in the range of 5-10 g / 10 min. Propylene homopolymer (HPP-3) having

  The polypropylene composition (C2) is a heterophasic propylene copolymer (HECO-1) in an amount of at least 25 wt%, preferably at least 30 wt%, more preferably at least 35 wt%, based on the weight of the polypropylene composition (C2). Even more preferably in an amount of at least 40 wt%, such as in the range of 25-70 wt%, preferably in the range of 30-60 wt%, more preferably in the range of 35-55 wt%, even more preferably in the range of 41-50 wt%. It is recognized that it contains.

  The heterophasic propylene copolymer (HECO-1) comprises propylene homopolymer (HPP-1) in an amount of at least 55 wt% based on the weight of the heterophasic propylene copolymer (HECO-1), preferably at least 65 wt%, more preferably at least It will be appreciated that an amount of 80 wt% is included, such as in the range of 55-95 wt%, preferably in the range of 65-90 wt%, more preferably in the range of 80-90 wt%.

  Furthermore, the heterophasic propylene copolymer (HECO-1) is an elastomeric propylene copolymer (PC-1), based on the weight of the heterophasic propylene copolymer (HECO-1), in an amount of 45 wt% or less, preferably in an amount of 35 wt% or less, more preferably It is recognized that the content of the selenium is 20 wt% or less, for example in the range of 5-45 wt%, preferably in the range of 10-35 wt%, more preferably in the range of 10-20 wt%.

  The polypropylene composition (C2) is a heterophasic propylene copolymer (HECO-2) in an amount of 35 wt% or less, preferably 25 wt% or less, more preferably 19 wt% or less, based on the weight of the polypropylene composition (C2). It is recognized that, for example, it is contained in the range of 10 to 25 wt%, more preferably in the range of 13 to 19 wt%, such as the range of 8 to 35 wt%.

  The heterophasic propylene copolymer (HECO-2) converts the propylene homopolymer (HPP-2) to an amount of at least 35 wt%, preferably at least 45 wt%, more preferably at least at least based on the weight of the heterophasic propylene copolymer (HECO-2). It is recognized that the amount is 55 wt%, even more preferably at least 60 wt%, such as in the range 35-95 wt%, preferably in the range 45-85 wt%, more preferably in the range 55-75 wt%.

  Furthermore, the heterophasic propylene copolymer (HECO-2) is an elastomeric propylene copolymer (PC-2) based on the weight of the heterophasic propylene copolymer (HECO-2) in an amount of 65 wt% or less, preferably 55 wt% or less, more preferably Is in an amount of 45 wt% or less, even more preferably in an amount of 40 wt% or less, such as in the range of 5 to 65 wt%, preferably in the range of 15 to 55 wt%, more preferably in the range of 10 to 45 wt%, even more preferably 25 It is recognized to contain in the range of ~ 45 wt%.

  Further, the polypropylene composition (C2) is an elastomeric ethylene copolymer (EC) in an amount of 30 wt% or less, preferably 25 wt% or less based on the weight of the polypropylene composition (C2), such as a range of 8-30 wt%. , Preferably in the range of 10-30 wt%, more preferably in the range of 15-25 wt%.

  Furthermore, the polypropylene composition (C2) contains the filler (F) in an amount of 30 wt% or less, preferably 20 wt% or less, more preferably 14 wt% or less based on the weight of the polypropylene composition (C2), for example, It will be appreciated that it includes in the range of 1-30 wt%, preferably in the range of 5-20 wt%, and even more preferably in the range of 10-14 wt%.

  Propylene homopolymer (HPP-3) is not an essential compound of the polypropylene composition (C2). However, when propylene homopolymer (HPP-3) is included in the polypropylene composition (C2), the propylene homopolymer (HPP-3) is an amount of 25 wt% or less based on the weight of the polypropylene composition (C2), preferably It is recognized that it is present in an amount of 20 wt% or less, more preferably 15 wt% or less, such as in the range of 0-20 wt%, preferably in the range of 1-20 wt%, preferably in the range of 5-15 wt%.

  In the polypropylene composition (C2), the additive (AD) is added in the range of 0.1 to 20 wt%, preferably in the range of 0.5 to 15 wt%, more preferably in the range of 0.1 to 20 wt% based on the weight of the polypropylene composition (C2). It may be included in an amount in the range of 5-10 wt%, even more preferably in the range of 0.5-5.0 wt%.

  Heterogeneous propylene copolymer (HECO-1), heterophasic propylene copolymer (HECO-2), elastomeric ethylene copolymer (EC), optionally propylene homopolymer (HPP-3), and optionally polymer carrier material (PCM) only polypropylene It may be a polymer component in the composition (C2), i.e. no other polymer component may be present.

  The polypropylene composition (C2) comprises a heterophasic propylene copolymer (HECO-1), a heterophasic propylene copolymer (HECO-2), an elastomeric ethylene copolymer (EC), a filler (F), and optionally a propylene homopolymer (HPP -3) and optionally an additive (AD).

Preferably, the homopolymer (HPP-1) and the propylene homopolymer (HPP-2) of the polypropylene composition (C2) are both inequality (IIIa ′), preferably inequality (IIIb ′), more preferably inequality (IIIc ′). ), And more preferably satisfies the inequality (IIId ′).
MFR (HPP-1) -MFR (HPP-2) ≧ 50 (IIIa ′)
170 ≧ MFR (HPP-1) −MFR (HPP-2) ≧ 50 (IIIb ′)
150 ≧ MFR (HPP-1) −MFR (HPP-2) ≧ 70 (IIIc ′)
125 ≧ MFR (HPP-1) −MFR (HPP-2) ≧ 90 (IIId ′)
Here, MFR (HPP-1) is the melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of propylene homopolymer (HPP-1), and MFR (HPP-2) is propylene homopolymer (HPP-2) measured melt flow rate _MFR 2 (230 ℃, 2.16kg) according ISO 1133 of a.

Preferably, the homopolymer (HPP-1) and the propylene homopolymer (HPP-2) of the polypropylene composition (C2) are both inequality (IVa ′), preferably inequality (IVb ′), more preferably inequality (IVc ′). ), And more preferably satisfies the inequality (IVd ′).
MFR (HPP-1) -MFR (HPP-3) ≧ 75 (IVa ′)
190 ≧ MFR (HPP-1) −MFR (HPP-3) ≧ 75 (IVb ′)
170 ≧ MFR (HPP-1) −MFR (HPP-3) ≧ 100 (IVc ′)
165 ≧ MFR (HPP-1) −MFR (HPP-3) ≧ 140 (IVd ′)
Where MFR (HPP-1) is the melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of propylene homopolymer (HPP-1), and MFR (HPP-3) is propylene homopolymer (HPP-3) a melt flow rate _MFR 2 (230 ℃, 2.16kg) measured according ISO 1133 of a.

  The polypropylene composition (C2) has a bending coefficient of at least 1400 MPa, preferably at least 1500 MPa, more preferably at least 1600 MPa, such as in the range of 1400 to 1800 MPa, preferably in the range of 1500 to 1700 MPa, more preferably in the range of 1600 to 1700 MPa. Is recognized as having

Furthermore, the polypropylene composition (C2) is at least 15 g / 10 min, preferably at least 18 g / 10 min, more preferably at least 20 g / 10 min, such as in the range 15-100 g / 10 min, preferably in the range 18-50 g / 10 min. It is recognized that it has a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133, more preferably in the range of 20-40 g / 10 min.

It is a finding of the present invention that the density of the polypropylene composition (C2) can be reduced without negatively affecting mechanical properties such as rigidity and impact resistance. Accordingly the polypropylene composition (C2) is, 995kg / cm ³ or less, preferably 990kg / cm ³ or less, such as the range of 975~995kg / cm ^3, preferably in the range of 975~990kg / cm ^3, more preferably 975～ It is recognized that it has a density measured according to ISO 1183-187 in the range of 985 kg / cm ³ .

  All the components used for the preparation of this composition, ie propylene composition (C2), are known. Therefore, the preparation of those components is also well known.

  The extruder is fed with heterophasic propylene (HECO-1), heterophasic propylene (HECO-1), elastomeric ethylene copolymer (EC), filler (F), optionally propylene homopolymer (HPP-3), and optionally additives ( The polypropylene composition (C2) can be prepared by adding AD) and extruding them.

Heterogeneous propylene copolymer (HECO-1)
As indicated above, the expression “heterophasic” indicates that at least one elastomeric copolymer is (finely) dispersed in the matrix. The heterophasic composition (HECO-1) preferably comprises (semicrystalline) polypropylene as a matrix and an elastomeric propylene copolymer dispersed in said matrix. It will be appreciated that the heterophasic propylene copolymer (HECO-1) includes at least propylene homopolymer (HPP-1) as a matrix, and at least the elastomeric propylene copolymer (PC-1) is dispersed in the matrix.

  Given above (including numerical values and ranges) for propylene homopolymer (HPP-1) and elastomeric propylene copolymer (PC-1) in relation to the heterophasic propylene composition (HC) of the propylene composition (C1) The definition can also be applied to heterophasic propylene copolymer (HECO-1).

  It is recognized that the heterophasic propylene copolymer (HECO-1) is nucleated, in particular alpha nucleated. Thus, it is recognized that heterophasic propylene copolymer (HECO-1) contains an alpha nucleating agent. Preferably, the heterophasic propylene composition (HC) does not contain a beta nucleating agent. The disclosure provided for the heterophasic propylene composition (HC) of the propylene composition (C1) to the selection and application of the nucleating agent applies equally to the heterophasic propylene copolymer (HECO-1).

  The comonomer content such as ethylene content of the heterophasic propylene copolymer (HECO-1) may be in the range of 5-20 mol%, preferably in the range of 5-15 mol%.

  The comonomer content such as ethylene content of the xylene soluble fraction (XCS) of the heterophasic propylene copolymer (HECO-1) is preferably in the range of 30-60 mol%, more preferably in the range of 35-55 mol%, even more preferably. Is in the range of 40-55 mol%.

  For the definition of the comonomer present in the heterophasic propylene copolymer (HECO-1) and / or the comonomer present in the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-1), the propylene composition (C1) Reference is made to the definition of the comonomer of the elastomeric propylene copolymer (PC-1).

  Preferably, the amount of xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-1) is 45 wt% or less, preferably 35 wt% or less, more preferably 20 wt%, based on the weight of the heterophasic propylene copolymer (HECO-1). % Or less, even more preferably in the range of 5 to 45 wt%, even more preferably in the range of 10 to 35 wt%, even more preferably in the range of 10 to 20 wt%.

  The intrinsic viscosity of the xylene soluble component fraction (XCS) affects the impact strength and flowability of the polypropylene composition. High intrinsic viscosity of the xylene soluble component fraction (XCS) improves impact strength but decreases fluidity. Therefore, it is necessary to balance the intrinsic viscosity of the xylene soluble component fraction (XCS).

  The intrinsic viscosity (IV) measured according to ISO 1268-1 (135 ° C. in decalin) of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-1) is 3.2 dl / g or less, preferably 3.0 dl / g g or less, more preferably 2.5 dl / g or less, such as 1.5 to 3.2 dl / g, preferably 1.5 to 3.0 dl / g, more preferably 2.0 to 2. It is recognized that it is in the range of 5 dl / g.

  The heterophasic propylene copolymer (HECO-1) can be produced by mixing different components, ie propylene homopolymer (HPP-1), and elastomeric propylene copolymer (PC-1). Alternatively, heterophasic propylene copolymer (HECO-1) can be produced in a sequential step process using multiple reactors operating in different reaction conditions in a continuous configuration.

  The heterophasic propylene copolymer (HECO-1) is preferably produced in a multi-stage process known in the art, where the matrix or propylene homopolymer (HPP-1) is produced in at least one slurry reactor before the elastomer. Copolymer or propylene copolymer (PC-1) is produced in at least one, preferably two gas phase reactors. A typical Ziegler-Natta catalyst can be used as the catalyst, reference is made to WO 92/19653 and WO 99/24479.

  Heterophase propylene copolymer (HECO-1) is commercially available.

Heterogeneous propylene copolymer (HECO-2)
As indicated above, the expression “heterophasic” indicates that at least one elastomeric copolymer is (finely) dispersed in the matrix. The heterophasic composition (HECO-2) preferably comprises (semicrystalline) polypropylene as a matrix and an elastomeric propylene copolymer dispersed in the matrix. It is recognized that the heterophasic propylene copolymer (HECO-2) includes at least propylene homopolymer (HPP-2) as a matrix, and at least an elastomeric propylene copolymer (PC-2) is dispersed in the matrix.

  Given above (including numerical values and ranges) for propylene homopolymer (HPP-2) and elastomeric propylene copolymer (PC-2) in relation to the heterophasic propylene composition (HC) of the propylene composition (C1) The definition can also be applied to heterophasic propylene copolymer (HECO-2).

  It is recognized that the heterophasic propylene copolymer (HECO-1) is nucleated, in particular alpha nucleated. Thus, it is recognized that heterophasic propylene copolymer (HECO-1) contains an alpha nucleating agent. Preferably, the heterophasic propylene composition (HC) does not contain a beta nucleating agent. The disclosure provided for the heterophasic propylene composition (HC) of the propylene composition (C1) to the selection and application of the nucleating agent applies equally to the heterophasic propylene copolymer (HECO-1).

  The comonomer content such as ethylene content of the heterophasic propylene copolymer (HECO-2) is in the range of 10-30 mol%, preferably in the range of 10-25 mol%, more preferably in the range of 15-20 mol%.

  The comonomer content such as ethylene content of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2) is in the range of 30-60 mol%, preferably in the range of 30-55 mol%, more preferably in the range of 40-55 mol. % Range.

  For the definition of the comonomer present in the heterophasic propylene copolymer (HECO-2) and / or the comonomer present in the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2), the propylene composition (C1) Reference is made to the definition of the comonomer of the elastomeric propylene copolymer (PC-2).

  Preferably, the amount of xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2) is 65 wt% or less, preferably 55 wt% or less, more preferably 45 wt%, based on the weight of the heterophasic propylene copolymer (HECO-2). % Or less (eg, 40 wt% or less), even more preferably in the range of 5 to 65 wt%, even more preferably in the range of 15 to 55 wt%, even more preferably in the range of 10 to 45 wt%, for example in the range of 25 to 45 wt%. Etc.

  As indicated above, the intrinsic viscosity of the xylene soluble component fraction (XCS) affects the impact strength and flowability of the polypropylene composition. High intrinsic viscosity of the xylene soluble component fraction (XCS) improves impact strength but decreases fluidity. Therefore, it is necessary to balance the intrinsic viscosity of the xylene soluble component fraction (XCS).

  The intrinsic viscosity (IV) measured according to ISO 1268-1 (135 ° C. in decalin) of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2) is not more than 3.0 dl / g, preferably 2.5 dl / g It is recognized that it is below g, for example in the range of 1.5 to 3.0 dl / g, preferably in the range of 2.0 to 3.0 dl / g.

  A heterophasic propylene copolymer (HECO-2) can be produced by mixing different components, namely a propylene homopolymer (HPP-2) and an elastomeric propylene copolymer (PC-2). Alternatively, heterophasic propylene copolymer (HECO-2) can be produced in a sequential step process using multiple reactors operating in different reaction conditions in a continuous configuration.

  The heterophasic propylene copolymer (HECO-2) is preferably produced in a multi-stage process known in the art, where the matrix or propylene homopolymer (HPP-2) is produced in at least one slurry reactor before the elastomer. Copolymer or propylene copolymer (PC-2) is produced in at least one, preferably two gas phase reactors. A typical Ziegler-Natta catalyst can be used as the catalyst, reference is made to WO 92/19653 and WO 99/24479.

  Heterogeneous propylene copolymer (HECO-2) is commercially available.

Propylene homopolymer (HPP-3), elastomeric ethylene copolymer (EC), filler (F), and additive (AD)
Propylene homopolymer (HPP-3), elastomeric ethylene copolymer (EC), filler (F), and additive (AD), as defined in detail for the heterophasic propylene composition (HC) of the propylene composition (C1) The definition given above for can also be applied to the propylene composition (C2).

  Thus, the propylene composition (C2) is a specific embodiment of the propylene composition (C1).

Automotive Article In a third aspect, the present invention is directed to an automotive article comprising a polypropylene composition (C1) or a polypropylene composition (C2).

  Preferably, the automotive article is at least 80 wt%, such as 80-99.9 wt%, more preferably at least 90 wt%, such as 90-99.9 wt%, even more preferably at least 95 wt%, such as 95-99.9 wt%. % Polypropylene composition (C1) or polypropylene composition (C2). In one embodiment, the automotive article consists of a polypropylene composition (C1) or a polypropylene composition (C2).

  It is recognized that automotive articles have a flexural modulus of at least 1400 MPa, preferably at least 1500 MPa, more preferably at least 1600 MPa, such as in the range of 1400-1800 MPa, preferably in the range of 1500-1700 MPa, more preferably in the range of 1600-1700 MPa. Is done.

  Preferably, the automotive article is an article inside or outside the automobile, the latter being preferred. In particular, the automotive article is preferably selected from the group consisting of bumpers, lock panels, and sill plates, with bumpers being particularly preferred.

  Automotive articles are typically molded articles, preferably injection molded articles or compression molded articles. It is recognized that the automotive article is an injection molded article or a compression molded article, the former being particularly preferred.

  It should be understood that the above applies to both the polypropylene composition (C1) and the polypropylene composition (C2).

Use In a fourth aspect, the present invention is directed to the use of a polypropylene composition (C1) or a polypropylene composition (C2) in an automotive article, preferably the aforementioned automotive article.

1. Definitions / Measurement Methods Unless otherwise defined, the following term definitions and determination methods also apply to the above general description of the invention and the following examples.

Microstructure quantification by NMR spectroscopy:
Quantitative nuclear magnetic resonance (NMR) spectroscopy is used to quantify the isotacticity and regioregularity of polypropylene homopolymers.

Quantitative ¹³ C { ¹ H} NMR spectra were recorded in solution using a Bruker Advance III 400 NMR spectrometer operating at 400.15 MHz and 100.62 MHz for ¹ H and ¹³ C, respectively. All spectra were recorded using a ¹³ C optimized 10 mm extended temperature probe head at 125 ° C. with nitrogen gas for all air pressures.

Respect polypropylene homopolymer was dissolved in the material of about 200 mg 1,2-tetrachloroethane _{(tetrachloroethane) -d 2 (TCE-} d 2). To ensure a homogeneous solution, the NMR tube was further heated in a rotary oven for at least 1 hour after the initial sample preparation in the heat block. The tube was rotated at 10 Hz during insertion into the magnet. This setup was chosen primarily for the high resolution required for quantification of stereoregular distribution (Busico, V., Cipullo, R., Prog. Polym. Sci. 26 (2001) 443; Busico, V Cipullo, R., Monaco, G., Vacacello, M., Segre, AL, Macromolecules 30 (1997) 6251). Standard single pulse excitation was used using NOE and bilevel WALTZ16 decoupling schemes (Zhou, Z., Kümmerle, R., Qiu, X., Redwine, D., Cong, R., Taha, A). , Baugh, D. Winniford, B., J. Mag. Reson. 187 (2007) 225; G., Macromol. Rapid Commun. 2007, 28, 11289). A total of 8192 (8k) transients per spectrum were acquired.

Using a proprietary computer program, the quantitative ¹³ C { ¹ H} NMR spectra were processed and integrated, and the associated quantitative properties were determined from the integrated values.

  For the polypropylene homopolymer, all chemical shifts are internally referenced to methyl isotactic pentad (mmmm) at 21.85 ppm.

  Site defects (Resoni, L., Cavallo, L., Fait, A., Piemontesi, F., Chem. Rev. 2000, 100, 1253 ;; Wang, W-J., Zhu, S., Macromolecules 33 (2000 ), 1157; Cheng, H.N., Macromolecules 17 (1984), 1950) or comonomer signals were observed.

  Stereoregularity distribution was quantified by integration of the methyl region between 23.6 and 19.7 ppm corrected for any site not related to the desired conformation (Busico, V., Cipullo, R., Prog. Polym.Sci.26 (2001) 443; Busico, V., Cipullo, R., Monaco, G., Vacatello, M., Segre, AL, Macromolecules 30 (1997) 6251).

  Specifically, the effects of site defects and comonomers on the quantification of stereoregular distribution were corrected by subtracting representative site defects and comonomer integration values from specific integration regions of the stereo sequence.

Isotacticity was defined at the pentad level and reported as a percentage of the isotactic pentad (mmmm) array over the total pentad array.
[Mmmm]% = 100 * (mmmm / total of all pentads)

  The presence of 2,1 erythro site defects was indicated by the presence of two methyl sites at 17.7 ppm and 17.2 ppm and confirmed by other feature sites. Characteristic signals corresponding to other types of site defects were not observed (Resoni, L., Cavalo, L., Fait, A., Piemontesi, F., Chem. Rev. 2000, 100, 1253).

The average integral of two characteristic methyl sites at 17.7 ppm and 17.2 ppm was used to quantify the amount of 2,1 erythro site defects.
P _21e = (I _e6 + I _e8 ) / 2

The amount of 1,2 primary insertion propene was quantified based on the methyl region, and corrections were made for sites not involved in primary insertion contained in this region and primary insertion sites excluded from this region.
P ₁₂ = I _CH3 + P _12e

The total amount of propene was quantified as the sum of primary insertion propene and all other site defects present.
P _total = P ₁₂ + P _21e

The mole percentage of 2,1-erythro site defects was quantified relative to total propene.
[21e] mol% = 100 * ( _P21e / _Ptotal )

  Observe the characteristic signal corresponding to the incorporation of ethylene (as described in Cheng, HN, Macromolecules 1984, 17, 1950) and determine the comonomer fraction as the fraction of ethylene in the polymer relative to all monomers in the polymer. Calculated.

WJ. Wang and S.W. The comonomer fraction was quantified by integration of multiple signals over the spectral region of the ¹³ C { ¹ H} spectrum using the method of Zhu, Macromolecules 2000, 33 1157. This method was chosen because of its robust nature and ability to consider the presence of site defects when needed. The integration region was slightly adjusted to increase applicability across the entire range of comonomer content encountered.

  From the mole fraction, the mole percent comonomer incorporation was calculated.

  From the mole fraction, weight percent comonomer incorporation was calculated.

MFR ₂ (230 ° C.) is measured according to ISO 1133 (230 ° C., 2.16 kg load).

MFR ₂ (190 ° C.) is measured according to ISO 1133 (190 ° C., 2.16 kg load).

  Low temperature xylene soluble component (XCS, wt%): The content of low temperature xylene soluble component (XCS) is determined at 25 ° C. according to ISO 16152; 1st edition; 2005-07-01.

  The bending modulus was determined in a three-point bend according to ISO 178 for an 80 × 10 × 4 mm injection molded sample prepared according to ISO 294-1: 1996.

The median particle size (D ₅₀ ) and topcut (D ₉₅ ) are calculated from the particle size distribution determined by laser diffraction according to ISO 13320-1: 1999.

  The density is measured according to ISO 1183-1: 2004 / Method A. Sample preparation is performed by compression molding according to ISO 1872-2: 2007.

  Multiaxial impact (2.2 m / s, 23 ° C. and −30 ° C.) was determined according to ASTM D3763.

  Intrinsic viscosity is measured according to DIN ISO 1628/1, October 1999 (135 ° C. in decalin).

Charpy impact test:
Charpy (notched / non-notch) impact strength (Charpy NIS / IS) was measured using an 80 × 10 × 4 mm ³ injection molded bar test sample prepared according to ISO 294-1: 1996. Measure at 23 ° C. and −30 ° C. according to ISO 179 2C / DIN 53453.

The surface area is defined as the BET surface according to ISO 787-11 by nitrogen (N ₂ ).

  Shrinkage: ISO 294-1

The weight reduction percentage is determined by cutting a sample having a size of 60 cm × 60 cm from the range to which the rear bumper license plate prepared by injection molding of the compositions IE1 and IE2 of the present invention and the comparative composition CE1 is attached. The sample is maintained for 48 h at a temperature of 22 ° C. ± 3 ° C. and a humidity of 50% ± 5. Thereafter, Mettler Toledo International Inc. The weight of the sample is determined by ME2002 / 02 (Shanghai, China), and the weight reduction rate is calculated according to equation (V).
(W ₀ −W) / W ₀ × 100% (V)
Where W ₀ is the weight of the sample prepared from the comparative composition CE1, and W is the weight of the sample prepared from each of the compositions IE1 and IE2 of the present invention.

2. Examples The invention is illustrated by the following examples.

  Propylene compositions IE1 and IE2 of the present invention are based on the recipes summarized in Table 1.

  “HECO-1” is a heterophasic propylene copolymer as shown in Table 2.

  “HECO-2” is a heterophasic propylene copolymer as shown in Table 3.

  “HPP-3” is a commercially available propylene homopolymer as shown in Table 4.

  “EC-1” is a commercially available ethylene copolymer “Engine 7467” from Dow Chemical Company as shown in Table 4.

  “EC-2” is a commercially available ethylene copolymer “Enchange 8200” from Dow Chemical Company as shown in Table 4.

“F” is a commercially available talc “Jetfine T1CA” from Imerys Talc (France), with a median particle size (D ₅₀ ) of 4.2 μm, a cut-off particle size (d ₉₅ ) of 8.9 μm, and 12. With a BET surface area of 6 m ² / g.

  “CE1” is a commercially available propylene composition “EF209AEC” from Bourge (Shanghai).

  The heterophasic propylene copolymer (HECO-1) used in Examples IE1 and IE2 of the present invention was prepared by the known Borstar® technology disclosed, for example, in European Patent Application 0,887,379A1 .

The catalysts used in the polymerization process for the preparation of heterophasic propylene copolymers (HECO-1) and (HECO-3) (Inventive Examples IE1 and IE2) were produced as follows. First, 0.1 mol MgCl ₂ × 3 EtOH was suspended in 250 ml decane under inert conditions in an atmospheric pressure reactor. The solution was cooled to a temperature of −15 ° C. and 300 ml of cold TiCl ₄ was added while maintaining the temperature at the level. The slurry temperature was then slowly raised to 20 ° C. At this temperature, 0.02 mol of dioctyl phthalate (DOP) was added to the slurry. After the phthalate addition, the temperature was raised to 135 ° C. in 90 minutes and the slurry was left for 60 minutes. Then another 300 ml of TiCl ₄ was added and the temperature was kept at 135 ° C. for 120 minutes. Thereafter, the catalyst was filtered from the liquid and washed 6 times with 300 ml heptane at 80 ° C. The solid catalyst component was then filtered and dried. The concept of the catalyst and its preparation is generally described in, for example, European Patent Nos. 491566, 591224, and European Patent No. 586390. Triethylaluminum (TEAL) was used as a cocatalyst and dicyclopentyldimethoxysilane [(C ₅ H ₉ ) ₂ Si (OCH ₃ ) ₂ ] was used as a donor. The ratio of aluminum to donor is shown in Table 2.

  For heterophasic propylene copolymer (HECO-2), a prepolymerized amount of vinylcyclohexane and catalyst to achieve a concentration of 200 ppm poly (vinylcyclohexane) (PVCH: polycyclohexane) in the final polymer. did. The respective processes are described in EP 1 028 984 and EP 1 183 307.

  The propylene compositions IE1 and IE2 of the present invention are produced by melt mixing. The composition of the present invention is based on the recipe summarized in Table 1 and is prepared by using a Coperion STS-35 twin screw extruder (Coperion (Nanjing) Corporation, available from China) having a diameter of 35 mm. . The twin screw extruder runs at an average screw speed of 400 rpm with a zone temperature profile of 180-220 ° C. Its L / D is 44. The temperatures, throughput, and screw speeds of each zone of the extruder for preparing the compositions of Examples IE1 and IE2 of the present invention are listed in Table 4.

  The temperature, throughput, and screw speed for each zone of the extruder are the leading parameters and are set in the extruder control panel. Melt temperature (temperature of the melt in the die) and extruder torque are passive parameters shown on the control panel of the extruder. A vacuum pump (bump) is located in the zone 9, and a reduced pressure of -0.6 MPa is generated inside the extruder.

  Bumpers are prepared by injection molding with the Engel Duo 4000 from the Engel Group Company (Austria) using the compositions IE1 and IE2 of the present invention. Table 5 shows the process conditions.

  A comparative composition CE1 is used to prepare a bumper by injection molding with the Engel Duo 4000 of the Engel Group Company (Austria), with process conditions similar to those applied to the preparation of bumpers from the compositions IE1 and IE2 of the present invention. .

Bumpers prepared from the composition IE1 of the present invention (with MFR _{2 of} 24 g / 10 min) have an average thickness of 2.8 mm.

Bumpers prepared from the composition IE2 of the present invention (with MFR _{2 of} 35 g / 10 min) have an average thickness of 2.5 mm.

In addition to the lower density of the compositions IE1 and IE2 of the present invention compared to the density of the comparative composition CE1, the reduction of the average thickness contributes to the weight reduction. In order to prepare thin wall bumpers (for example, an average thickness of 2.5 mm, etc.) by injection molding, at least 18 g / 10 min. Only compositions having an MFR ₂ (230 ° C., 2.16 kg) can be used.

From Table 1, it can be seen that the compositions IE1 and IE2 of the present invention have similar properties as the comparative composition CE1. Furthermore, it can be seen that the bumpers prepared from the composition IE1 of the present invention show a 6.7% weight reduction due to the reduced density compared to the bumpers prepared from the comparative composition CE1. Furthermore, it can be seen that the bumpers prepared from the composition IE2 of the present invention show a 13% weight reduction compared to the bumpers prepared from the comparative composition CE1 due to the reduced density and the reduced average thickness.

Claims (15)

(C) a heterophasic propylene composition (HC),
(A1) Propylene homopolymer (HPP-1) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of at least 100 g / 10 min and according to ISO 1133 in the range of 30-90 g / 10 min. A matrix (M) comprising a propylene homopolymer (HPP-2) having a measured melt flow rate MFR ₂ (230 ° C., 2.16 kg);
(A2) an elastomeric propylene copolymer (PC-1), an elastomeric propylene copolymer (PC-2), an elastomeric ethylene copolymer (EC) comprising units derived from ethylene and units derived from C _{4 to} C ₂₀ α-olefin; A heterophasic propylene composition (HC) comprising:
(D) A polypropylene composition (C1) comprising a filler (F). 2. The matrix (M) further comprises a propylene homopolymer (HPP-3) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of 25 g / 10 min or less. Polypropylene composition (C1). The heterophasic propylene composition (HC) is:
(A) the matrix (M) in an amount of at least 50 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (b) a total amount of the elastomer propylene copolymer (PC-1) of 50 wt% or less based on the weight of the heterophasic propylene composition (HC), the elastomer propylene copolymer (PC-2), and the The polypropylene composition (C1) according to any one of claims 1 to 2, comprising an elastomeric ethylene copolymer (EC). The heterophasic propylene composition (HC) is:
(A) the propylene homopolymer (HPP-1) in an amount ranging from 25 to 60 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (b) the propylene homopolymer (HPP-2) in an amount ranging from 5 to 30 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (c) the propylene homopolymer (HPP-3) in an amount ranging from 0 to 20 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (d) an elastomeric propylene copolymer (PC-1) in an amount ranging from 2 to 15 wt%, based on the weight of the heterophasic propylene composition (HC);
And / or (e) an elastomeric propylene copolymer (PC-2) in an amount ranging from 2 to 15 wt% based on the weight of the heterophasic propylene composition (HC);
And / or (f) the elastomeric ethylene copolymer (EC) in an amount ranging from 10 to 35 wt% based on the weight of the heterophasic propylene composition (HC).
The polypropylene composition (C1) according to any one of claims 1 to 3, comprising:   The said filler (F) is a polypropylene composition (C1) as described in any one of Claims 1-4 contained in the quantity of 30 wt% or less based on the weight of the said polypropylene composition (C1). (A) heterophasic propylene copolymer (HECO-1),
(A1) a propylene homopolymer (HPP-1) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 of at least 100 g / 10 min;
(A2) a heterophasic propylene copolymer (HECO-1) comprising: an elastomeric propylene copolymer (PC-1);
(B) heterophasic propylene copolymer (HECO-2),
(B1) a propylene homopolymer (HPP-2) having a melt flow rate MFR ₂ (230 ° C., 2.16 kg) measured according to ISO 1133 in the range of 30-90 g / 10 min;
(B2) a heterophasic propylene copolymer (HECO-2) comprising: an elastomeric propylene copolymer (PC-2);
(C) A polypropylene composition (C2) comprising: an ethylene copolymer and an elastomer copolymer (EC) comprising units derived from C _{4 to} C ₂₀ α-olefin. The polypropylene composition further comprises a propylene homopolymer (HPP-3) having a melt flow rate MFR ₂ (230 ° C, 2.16 kg) measured according to ISO 1133 of 25 g / 10 min or less. Polypropylene composition (C2). The polypropylene composition is
(A) the heterophasic propylene copolymer (HECO-1) in an amount of at least 25 wt% based on the weight of the polypropylene composition (C2);
And / or (b) said heterophasic propylene copolymer (HECO-2) in an amount ranging from 8 to 35 wt% based on the weight of said polypropylene composition (C2), and
And / or (c) the elastomeric ethylene copolymer (EC) in an amount ranging from 8 to 30 wt% based on the weight of the polypropylene composition (C2), and / or
And / or (d) the filler (F) in an amount ranging from 1 to 30 wt% based on the weight of the polypropylene composition (C2), and / or
And / or (e) the propylene homopolymer (HPP-3) in an amount ranging from 0 to 20 wt% based on the weight of the polypropylene composition (C2).
The polypropylene composition (C2) according to claim 6 or 7, comprising (A) The comonomer content of the xylene-soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-1) is in the range of 30 to 50 mol%,
And / or (b) the comonomer content of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2) is in the range of 30-50 mol% based on the weight of the heterophasic propylene copolymer (HECO-2). The polypropylene composition (C2) according to any one of claims 6 to 8. (A) The comonomer content of the heterophasic propylene copolymer (HECO-1) ranges from 5 to 20 mol% based on the weight of the heterophasic propylene copolymer (HECO-1);
And / or (b) the comonomer content of the heterophasic propylene copolymer (HECO-2) ranges from 10 to 30 mol% based on the weight of the heterophasic propylene copolymer (HECO-2). The polypropylene composition (C2) according to any one of the above. (A) The intrinsic viscosity (IV) measured according to ISO 1268-1 (decalin) of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-1) is in the range of 1.5 to 3.0 dl / g. Yes,
And / or (b) the intrinsic viscosity (IV) measured according to ISO 1268-1 (decalin) of the xylene soluble component fraction (XCS) of the heterophasic propylene copolymer (HECO-2) is 1.5 to 3.2 dl / g. The polypropylene composition (C2) according to any one of claims 6 to 10, which is in the range. The elastomeric ethylene copolymer (EC) is
(A) Melt flow rate MFR ₂ (190 ° C., 2.16 kg) measured according to ISO 1133 in the range of 0.1-15 g / 10 min.
And / or (b) a polypropylene composition (C1) according to any one of claims 1 to 5 or any one of claims 6 to 11 having a density in the range of 830 to 890 kg / cm ^3. The polypropylene composition (C2) described. Wherein the polypropylene composition, 18～50G / melt flow was measured according to ISO 1133 in the range of 10min rate _MFR 2 (230 ℃, 2.16kg) having, according to any one of claims 1-5 and 12 The polypropylene composition (C1) or the polypropylene composition (C2) according to any one of claims 6 to 12.   An automotive article comprising the polypropylene composition (C1) according to any one of claims 1 to 5 and 12 to 13 or the polypropylene composition (C2) according to any one of claims 6 to 12. Use of the polypropylene composition (C1) according to any one of claims 1 to 5 and 12 to 13 or the polypropylene composition (C2) according to any one of claims 6 to 12 in an automobile article. .