CN112143116A - Polypropylene composite material with consistent crystallinity of skin layer and core layer and preparation method thereof - Google Patents
Polypropylene composite material with consistent crystallinity of skin layer and core layer and preparation method thereof Download PDFInfo
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- CN112143116A CN112143116A CN202011032186.0A CN202011032186A CN112143116A CN 112143116 A CN112143116 A CN 112143116A CN 202011032186 A CN202011032186 A CN 202011032186A CN 112143116 A CN112143116 A CN 112143116A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
- C08L2205/242—Beta spherulite nucleating agents
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Abstract
The invention relates to a polypropylene composite material with consistent crystallinity of a skin layer and a core layer and a preparation method thereof. The composite material comprises the following components in percentage by weight: 41-78.2 percent of polypropylene, 10-25 percent of toughened elastomer, 10-30 percent of talcum powder, 1-2 percent of compatilizer, 0.2-0.4 percent of nucleating agent, 0.4-1.0 percent of antioxidant and 0.2-0.6 percent of weather resistant agent. When the composite material is subjected to injection molding, the crystallinity between the skin layer and the core layer is consistent, and the defect that the skin-core layer structure and the performance of an injection molding part are inconsistent for a long time is overcome.
Description
Technical Field
The invention belongs to the field of polypropylene materials and preparation thereof, and particularly relates to a polypropylene composite material with consistent crystallinity of a skin layer and a core layer and a preparation method thereof.
Background
Compared with other general thermoplastic resins, the polypropylene resin has the advantages of small relative density, low price, good processing performance, good comprehensive performance and the like, but the polypropylene is a crystalline material, when the polypropylene is subjected to injection molding, because a solution flows in a mold cavity, a skin layer is firstly rapidly cooled, the crystallization is incomplete, and a core layer is slowly cooled and is completely crystallized, so that a typical skin-core structure is formed, and the skin-core layer performance is different due to different crystallinities of the skin-core layer.
The automobile is with moulding the instrument board upper part of the body material firmly, mostly polypropylene combined material to moulding the instrument board upper part of the body firmly, the test of most core is the experiment of explosion of gasbag point, when the experiment of explosion goes on, because polypropylene combined material's skin core structure, often because the cortex layering drops when exploding the point, causes the piece departure, forms the threat to driver's personal safety.
Chinese patent CN102532701A discloses a low-warpage and creep-resistant polypropylene composition, and a preparation method and an application thereof, wherein the composition is prepared from the following components in percentage by mass: 40-80% of polypropylene resin, 5-30% of elastomer, 0-40% of inorganic filler, 0.1-20% of compatilizer and 0.01-0.5% of nucleating agent. The polypropylene composition compositely modified by the compatilizer and the alpha-crystal nucleating agent can improve the interface bonding condition between the inorganic filler and the matrix resin, and can improve the dispersion state of the elastomer in the matrix resin, and the prepared product has good warping resistance and creep resistance. However, the polypropylene composition in the patent has a large difference in crystallinity between the skin and the core.
Disclosure of Invention
The invention aims to solve the technical problem of providing a polypropylene composite material with consistent crystallinity of a skin layer and a core layer and a preparation method thereof, so as to overcome the defect of larger difference of crystallinity of the skin layer and the core layer of the polypropylene composite material in the prior art.
The invention provides a polypropylene composite material with consistent crystallinity of a skin layer and a core layer, which comprises the following components in percentage by weight: 41-78.2% of polypropylene, 10-25% of toughened elastomer, 10-30% of talcum powder, 1-2% of compatilizer, 0.2-0.4% of nucleating agent, 0.4-1.0% of antioxidant and 0.2-0.6% of weather resisting agent, wherein the nucleating agent is a mixture of alpha-type nucleating agent and beta-type nucleating agent in a mass ratio of 1-1.5: 1-1.5.
The polypropylene is copolymerized polypropylene, and the comonomer of the copolymerized polypropylene is ethylene.
The toughening elastomer is at least one of polybutadiene rubber, ethylene-butylene copolymer, ethylene-octene copolymer and ethylene-propylene-diene rubber.
The particle size of the talcum powder is 1-50 mu m, and the weight percentage of the silicon dioxide is 60-90%.
The compatilizer is an olefin block copolymer, the block copolymer is a hydrogenated styrene-butadiene block copolymer, and the styrene content is more than or equal to 20%.
The nucleating agent is a mixture of alpha-type nucleating agent and beta-type nucleating agent in a mass ratio of 1:1.
The alpha-nucleating agent comprises at least one of aromatic carboxylate, dibenzylidene sorbitol, substituted aryl heterocyclic phosphate, dehydroabietic acid and salts thereof, and branched amide.
The beta-nucleating agent comprises at least one of a condensed ring compound with a quasi-planar structure, a salt of a group IIA metal element and a dicarboxylic acid compound thereof, and an aromatic diamide.
The antioxidant is a compound of any two of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, tri (2, 4-di-tert-butylphenyl) phosphite, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine and N-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
The weather resisting agent is at least one of hindered amine, benzotriazole, benzophenone and triazine benzylidene malonate light stabilizer.
The invention also provides a preparation method of the polypropylene composite material with consistent crystallinity of the skin layer and the core layer, which comprises the following steps:
and uniformly mixing the polypropylene, the toughening elastomer, the talcum powder, the compatilizer, the nucleating agent, the antioxidant and the weather-resistant agent, adding the mixed material into a double-screw extruder for extrusion, cooling and granulating to obtain the polypropylene composite material with the skin layer and the core layer with consistent crystallinity.
The mixing is carried out in a mixer, the temperature of the mixer is 60-70 ℃, the rotating speed of the mixer is 120-.
The temperature of the double-screw extruder from the feeding section to the head is 175-: 1.
the invention also provides application of the polypropylene composite material with consistent crystallinity of the skin layer and the core layer in the upper body of the hard plastic instrument board for the automobile.
The invention ensures that the crystallinity between the skin layer and the core layer is consistent when the material is injection molded through the synergistic effect of the compatilizer and the compound nucleating agent, makes up the defect of inconsistent skin-core layer structure and performance of injection molding parts for a long time, can be widely applied to the upper body of the hard plastic instrument panel with explosion-igniting requirements for automobiles, and solves the problem of layering caused by the skin-core structure during explosion-igniting experiments.
Advantageous effects
(1) The invention enhances the dispersion of the elastomer in the polypropylene through the synergistic action of the compatilizer and the compound nucleating agent, and can refine the crystal form size and improve the crystallization efficiency, so that the crystallinity between the skin layer and the core layer is consistent when the material is injection molded, and the defect of inconsistent skin-core layer structure and performance of the injection molding part for a long time is overcome.
(2) The preparation method is simple in process, and the prepared polypropylene composite material can be widely applied to the upper body of the hard plastic instrument panel with the explosion requirement for the automobile, so that the problem of layering caused by a skin-core structure in the explosion experiment is solved.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The raw materials of the components used in the embodiment of the invention are as follows, but not limited to the following raw materials:
copolymerized polypropylene: the seashell brand in EP548R,
elastomer: POE ENGAGE 7467 Dow,
a compatilizer: a commercially available hydrogenated styrene-butadiene block copolymer having a styrene content of not less than 20%,
nucleating agent: commercially available alpha-nucleating agents (Millad 3905 Milliken, NA11 Aidic) and commercially available beta-nucleating agents (STARNU-100 Japan physicochemical, WBG Weilinna), sodium bicyclo [2,2,1] heptane dicarboxylate, HPN-68, Milliken,
talc powder: 777A Hill city source of 3000 mesh,
an antioxidant A: the antioxidant is 1010 basf, and the antioxidant is,
and (3) antioxidant B: the antioxidant is 168 basf, and the antioxidant is,
weather resisting agent: UV-3808PP5 Cyanid.
Example 1
The embodiment provides a polypropylene composite material with consistent crystallinity of a skin layer and a core layer, which comprises the following components in parts by weight: 73.1 parts of polypropylene copolymer, 15 parts of elastomer, 10 parts of talcum powder, 1 part of compatilizer, 0.2 part of nucleating agent (alpha-type nucleating agent (2,2' -methylene-bis (4, 6-di-tert-butylphenoxy) sodium phosphate NA11) and beta-type nucleating agent (STARNU-100) in a mass ratio of 1: 1), 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather-resistant agent.
The preparation method of the composite material comprises the following steps: 73.1 parts of polypropylene copolymer, 15 parts of elastomer, 10 parts of talcum powder, 1 part of compatilizer, 0.2 part of nucleating agent, 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather resistant agent are added into a mixer and mixed uniformly. Wherein the temperature of the mixer is 63 ℃, the rotating speed of the mixer is 130 r/min, and then the mixed materials are added into a double-screw extruder for extrusion, cooling, granulation and packaging. The temperature of the extruder from the feeding section to the head is 175 ℃, 190 ℃, 185 ℃, 180 ℃ in sequence, the rotation speed of the screw is 180 r/min, and the length-diameter ratio of the screw is 40: 1.
example 2
The embodiment provides a polypropylene composite material with consistent crystallinity of a skin layer and a core layer, which comprises the following components in parts by weight: 62 parts of polypropylene copolymer, 25 parts of elastomer, 10 parts of talcum powder, 2 parts of compatilizer, 0.3 part of nucleating agent (alpha-type nucleating agent (NA11) and beta-type nucleating agent (WBG) in a mass ratio of 1: 1), 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather resisting agent.
The preparation method of the composite material comprises the following steps: 62 parts of polypropylene copolymer, 25 parts of elastomer, 10 parts of talcum powder, 2 parts of compatilizer, 0.3 part of nucleating agent, 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather resistant agent are added into a mixer and evenly mixed. Wherein the temperature of the mixer is 63 ℃, the rotating speed of the mixer is 130 r/min, and then the mixed materials are added into a double-screw extruder for extrusion, cooling, granulation and packaging. The temperature of the extruder from the feeding section to the head is 185 ℃, 200 ℃, 195 ℃, 190 ℃, the rotation speed of the screw is 180 r/min, the length-diameter ratio of the screw is 40: 1.
example 3
The embodiment provides a polypropylene composite material with consistent crystallinity of a skin layer and a core layer, which comprises the following components in parts by weight: 63 parts of polypropylene copolymer, 15 parts of elastomer, 20 parts of talcum powder, 1 part of compatilizer, 0.3 part of nucleating agent (alpha-type nucleating agent (Millad 3905) and beta-type nucleating agent (STARNU-100) in a mass ratio of 1: 1), 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather-resistant agent.
The preparation method of the composite material comprises the following steps: 63 parts of polypropylene copolymer, 15 parts of elastomer, 20 parts of talcum powder, 1 part of compatilizer, 0.3 part of nucleating agent, 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather resistant agent are added into a mixer and evenly mixed. Wherein the temperature of the mixer is 63 ℃, the rotating speed of the mixer is 130 r/min, and then the mixed materials are added into a double-screw extruder for extrusion, cooling, granulation and packaging. The temperature of the extruder from the feeding section to the head is 180 ℃, 195 ℃, 190 ℃, 185 ℃ in sequence, the rotation speed of the screw is 180 r/min, the length-diameter ratio of the screw is 40: 1.
example 4
The embodiment provides a polypropylene composite material with consistent crystallinity of a skin layer and a core layer, which comprises the following components in parts by weight: 52 parts of polypropylene copolymer, 25 parts of elastomer, 20 parts of talcum powder, 2 parts of compatilizer, 0.3 part of nucleating agent (alpha-type nucleating agent (Millad 3905) and beta-type nucleating agent (WBG) in a mass ratio of 1: 1), 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather resisting agent.
The preparation method of the composite material comprises the following steps: 52 parts of polypropylene copolymer, 25 parts of elastomer, 20 parts of talcum powder, 2 parts of compatilizer, 0.3 part of nucleating agent, 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather resistant agent are added into a mixer and evenly mixed. Wherein the temperature of the mixer is 63 ℃, the rotating speed of the mixer is 130 r/min, and then the mixed materials are added into a double-screw extruder for extrusion, cooling, granulation and packaging. The temperature of the extruder from the feeding section to the head is 175 ℃, 200 ℃, 190 ℃, 195 ℃, 190 ℃ and 190 ℃ in sequence, the rotating speed of the screw is 180 r/min, and the length-diameter ratio of the screw is 40: 1.
example 5
The embodiment provides a polypropylene composite material with consistent crystallinity of a skin layer and a core layer, which comprises the following components in parts by weight: 56.5 parts of polypropylene copolymer, 10 parts of elastomer, 30 parts of talcum powder, 1.5 parts of compatilizer, 0.4 part of nucleating agent (alpha-type nucleating agent (NA11) and beta-type nucleating agent (STARNU-100) in a mass ratio of 1: 1.5), 0.5 part of antioxidant A, 0.5 part of antioxidant B and 0.6 part of weather-resistant agent.
The preparation method of the composite material comprises the following steps: 56.5 parts of polypropylene copolymer, 10 parts of elastomer, 30 parts of talcum powder, 1.5 parts of compatilizer, 0.4 part of nucleating agent (alpha-type nucleating agent (NA11) and beta-type nucleating agent (STARNU-100) in a mass ratio of 1:1.5, 0.5 part of antioxidant A, 0.5 part of antioxidant B and 0.6 part of weather-resistant agent are added into a mixer to be uniformly mixed, wherein the temperature of the mixer is 63 ℃, the rotating speed of the mixer is 130 revolutions per minute, the mixed materials are added into a double-screw extruder to be extruded, cooled, granulated and packaged, the temperature of the extruder is 175 ℃, 190 ℃, 185 ℃, 180 ℃, the rotating speed of a screw is 180 revolutions per minute from a feeding section to a machine head, and the length-diameter ratio of the screw is 40: 1.
Example 6
The embodiment provides a polypropylene composite material with consistent crystallinity of a skin layer and a core layer, which comprises the following components in parts by weight: 62.9 parts of polypropylene copolymer, 20 parts of elastomer, 15 parts of talcum powder, 1 part of compatilizer, 0.2 part of nucleating agent (alpha-type nucleating agent (Millad 3905) and beta-type nucleating agent (WBG) in a mass ratio of 1.5: 1), 0.3 part of antioxidant A, 0.4 part of antioxidant B and 0.2 part of weather-resistant agent.
The preparation method of the composite material comprises the following steps: 62.9 parts of polypropylene copolymer, 20 parts of elastomer, 15 parts of talcum powder, 1 part of compatilizer, 0.2 part of nucleating agent (alpha nucleating agent (Millad 3905) and beta nucleating agent (WBG) in a mass ratio of 1.5:1, 0.3 part of antioxidant A, 0.4 part of antioxidant B and 0.2 part of weather resisting agent are added into a mixer to be uniformly mixed, wherein the temperature of the mixer is 63 ℃, the rotating speed of the mixer is 130 revolutions per minute, the mixed material is added into a double-screw extruder to be extruded, cooled, granulated and packaged, the temperature of the extruder is 180 ℃, 195 ℃, 190 ℃, 185 ℃, 180 ℃, the rotating speed of a screw is 180 revolutions per minute from a feeding section to a machine head, and the length-diameter ratio of the screw is 40: 1.
Comparative example 1
The comparative example provides a polypropylene composite material and a preparation method thereof, according to the example 1, no nucleating agent is added, the weight part of the polypropylene copolymer is changed to 73.3 parts, and the rest is the same as that of the example 1.
Comparative example 2
The comparative example provides a polypropylene composite material and a preparation method thereof, according to the example 1, the compatilizer is not added, the weight part of the polypropylene copolymer is changed to 74.1 parts, and the rest is the same as the example 1.
Comparative example 3
According to the embodiment 1, 0.3 part of the compound nucleating agent is changed into 0.3 part of the alpha-type nucleating agent, and the rest is the same as the embodiment 1.
Comparative example 4
According to the embodiment 1, 0.3 part of the compound nucleating agent is changed into 0.3 part of the beta-type nucleating agent, and the rest is the same as the embodiment 1.
Comparative example 5
Referring to chinese patent CN102532701A, the present comparative example provides a polypropylene composition, which comprises the following components in parts by weight: 73.1 parts of polypropylene copolymer, 15 parts of elastomer, 10 parts of talcum powder, 1 part of compatilizer, 0.2 part of nucleating agent (2,2' -methylene-bis (4, 6-di-tert-butylphenoxy) sodium phosphate and sodium bicyclo [2,2,1] heptane dicarboxylate (namely HPN-68) in a mass ratio of 1: 1), 0.2 part of antioxidant A, 0.2 part of antioxidant B and 0.3 part of weather resisting agent. The composition was prepared by the same method as in example 1.
Comparative example 6
The comparative example provides a polypropylene composite material and a preparation method thereof, according to example 1, a compound nucleating agent is modified into an alpha type nucleating agent (NA11) and a beta type nucleating agent (STARNU-100) in a mass ratio of 1:2, and the rest is the same as example 1.
The injection molded sample bars of examples 1 to 6 and comparative examples 1 to 6 were subjected to the following basic property test, and injection molded (injection molding machine 6 clamping force 60T, injection molding temperature 215 ℃, mold temperature 40 ℃), 3mm thick square plate was subjected to DSC (differential scanning calorimetry) analysis with 0.1mm thick slices taken at the surface layer position and the middle position in the thickness direction, and the results are shown in Table 1.
(1) Tensile strength: ISO 527, tensile speed 50 mm/min.
(2) Flexural modulus: ISO 178, bending speed 2 mm/min.
(3) Notch impact: ISO 179, pendulum energy 1J.
(4) Degree of crystallinity: the first and second heating rates are both 10K/min.
TABLE 1 results of the Performance test of examples and comparative examples
As can be seen from Table 1, when no nucleating agent or compatilizer is added to the composite material, the difference of the crystallinity of the skin-core layer of the composite material is obvious, and the mechanical properties are not obviously different. When the nucleating agent in the composite material is only the alpha-type nucleating agent or the beta-type nucleating agent, the difference of the crystallinity of the skin-core layer of the composite material is large, the mechanical property is not obviously changed, and when the nucleating agent is a mixture of two alpha-type nucleating agents, the difference of the crystallinity of the skin-core layer of the composite material is also large. In addition, the mass ratio of the alpha-type nucleating agent to the beta-type nucleating agent in the compound nucleating agent is not in the range of the invention, and the difference of the crystallinity of the skin-core layer of the composite material is larger. Therefore, the compatilizer and the compound nucleating agent have a synergistic effect, the alpha-type nucleating agent and the beta-type nucleating agent in the compound nucleating agent directly influence the synergistic effect, the synergistic effect can obviously reduce the crystallinity difference of a skin layer and a core layer of a material, and simultaneously the mechanical property of the composite material is not influenced, the compatilizer and the compound nucleating agent are added into the composite material, the crystallinity difference of the skin layer and the core layer is maintained within 0.5%, and the crystallinity of the skin layer and the core layer is basically consistent; in the comparative example, no compatilizer or compound nucleating agent is used in the composite material, and the difference of the crystallinity of the skin layer and the core layer is 3-5%.
From all the examples and all the comparative examples above, it is evident that: the invention enhances the dispersion of the elastomer in the polypropylene through the synergistic action of the compatilizer and the compound nucleating agent, and can refine the crystal form size and improve the crystallization efficiency, so that the crystallinity between the skin layer and the core layer is consistent when the material is subjected to injection molding, the defect of inconsistent skin-core layer structure and performance of injection molding parts for a long time is overcome, and the invention can be widely applied to the upper body of a hard plastic instrument panel with an explosion requirement for automobiles and solves the layering problem caused by the skin-core structure in the explosion experiment.
Claims (9)
1. The polypropylene composite material with the crystallinity of the skin layer consistent with that of the core layer is characterized in that the components of the composite material comprise the following components in percentage by weight: 41-78.2% of polypropylene, 10-25% of toughened elastomer, 10-30% of talcum powder, 1-2% of compatilizer, 0.2-0.4% of nucleating agent, 0.4-1.0% of antioxidant and 0.2-0.6% of weather resisting agent, wherein the nucleating agent is a mixture of alpha-type nucleating agent and beta-type nucleating agent in a mass ratio of 1-1.5: 1-1.5.
2. The composite material of claim 1, wherein the polypropylene is a co-polypropylene and the co-monomer of the co-polypropylene is ethylene.
3. The composite of claim 1, wherein the toughening elastomer is at least one of polybutadiene rubber, ethylene-butene copolymer, ethylene-octene copolymer, ethylene-propylene-diene rubber; the particle size of the talcum powder is 1-50 μm, and the weight percentage of the silicon dioxide is 60-90%.
4. The composite material of claim 1, wherein the compatibilizer is an olefin block copolymer, and the block copolymer is a hydrogenated styrene-butadiene block copolymer having a styrene content of 20% or more.
5. The composite material of claim 1, wherein the α -nucleating agent comprises at least one of aromatic carboxylates, dibenzylidene sorbitols, substituted aryl heterocyclic phosphates, dehydroabietic acid and salts thereof, and branched amides; the beta nucleating agent comprises at least one of a condensed ring compound with a quasi-planar structure, a salt of a group IIA metal element and a dicarboxylic acid compound thereof, and an aromatic diamide.
6. The composite material according to claim 1, wherein the antioxidant is a compound of any two of pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris (2, 4-di-tert-butylphenyl) phosphite, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine, and N-octadecyl β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
7. The composite material of claim 1, wherein the weathering agent is at least one of hindered amine, benzotriazole, benzophenone, and triazinebenzylidene malonate light stabilizers.
8. A method of making the composite material of claim 1, comprising:
and uniformly mixing the polypropylene, the toughening elastomer, the talcum powder, the compatilizer, the nucleating agent, the antioxidant and the weather-resistant agent, adding the mixed material into a double-screw extruder for extrusion, cooling and granulating to obtain the polypropylene composite material with the skin layer and the core layer with consistent crystallinity.
9. Use of the composite of claim 1 in an automotive hard plastic dashboard upper body.
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| CN113430714A (en) * | 2021-06-08 | 2021-09-24 | 南通大学 | Beta-crystal polypropylene anti-aging geotextile and preparation method thereof |
| CN114292439A (en) * | 2021-11-18 | 2022-04-08 | 上海若祎新材料科技有限公司 | Compounding aid composition, synthetic resin and polyolefin film/sheet |
| CN114736456A (en) * | 2022-03-24 | 2022-07-12 | 金发科技股份有限公司 | Polypropylene composition and preparation method and application thereof |
| WO2024066487A1 (en) * | 2022-09-30 | 2024-04-04 | 天津金发新材料有限公司 | Polypropylene composite material having good paint adhesion, preparation therefor and use thereof |
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