CN104530573A - Low-gloss low-warpage soft-touch-feeling vehicle polypropylene composition as well as preparation method and application thereof - Google Patents
Low-gloss low-warpage soft-touch-feeling vehicle polypropylene composition as well as preparation method and application thereof Download PDFInfo
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- 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
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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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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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Abstract
The invention belongs to the technical field of high-molecular polypropylene materials, and discloses a low-gloss low-warpage soft-touch-feeling vehicle polypropylene composition as well as a preparation method and application thereof. The composition comprises the following components in percentage by mass: 20-48 percent of polypropylene, 30-40 percent of an elastomer, 20-30 percent of filler, 1-10 percent of a compatilizer and 0.01-1 percent of a processing aid, wherein the polypropylene is copolymerized polypropylene, and the melt flow rate MFR is larger than 60g/10min; the melt flow rate MFR of the elastomer is smaller than 0.5g/10min. By limiting the melt flow rate of the raw materials such as the used polypropylene and elastomer and controlling the ratio of the used raw materials, the obtained composition product is extremely low in glossiness, flat, free of warpage, soft in hand touch feeling, balanced in toughness and capable of being widely applied to various fields, especially automotive trim products.
Description
Technical field
The invention belongs to polypropylene high molecular material technical field, particularly a kind of low gloss, low warpage, soft sense of touch polypropylene composition for vehicle and its preparation method and application.
Background technology
Along with the requirement of automotive trim aesthetics design, proposing automotive trim needs low gloss, reduces plastic sense, strengthens the texture of corium, vision and sense of touch give the sensation of " softness ".For automotive upholstery panel board, often in economic vehicle or hale and hearty type SUV adopt hard panel board, i.e. PP injection moulding, but material surface glossiness is high and plastic sense is strong.Flexible foamed instrument panel is often made up of soft epidermis+foamed core material+skeleton, to the texture of people's softness, is applicable to warm luxurious interior trim style.But this forming method complex process, price is high.Therefore, by formulating of recipe, giving common hard PP material with the sense of touch of " softness " becomes the problem attracted tremendous attention by single injection-molded." flexible touch " is a kind of performance of plastic part, is divided into vision sense of touch and hand sense of touch two aspects.The low gloss that can be described as product during eye contact is given the sensation of the softness of material and feels there is certain pliability with during hand touch article surface.
CN 101296986 A discloses the moulding compound that a kind of thermoplastic material strengthened by filler with extraordinary scratch resistance and flexible touch forms, this polymer molding compositions at least comprises 5 ~ 90wt% soft material and the glass material of 5 ~ 60wt% as filler and the combination of 3 ~ 70wt% thermoplastic polymer, said composition has good scratch resistance and the sense of touch of softness, but soft material content is all more than 50% in this embodiment, just obtain soft sense of touch thus, but too much interpolation soft material will have a strong impact on the mechanical property of material.
US Patent No. 8674028 B2 discloses a kind of polymer composition, comprising melt flow rate (MFR) is 1 ~ 60g/10min (230 DEG C, 2.16kg) first component (content 10 ~ 40wt%) of relative harder, melt flow rate (MFR) are relatively soft second component (content 25 ~ 70wt%), glass fibre (content 5 ~ 35wt%) and other processing aids of 1 ~ 40g/10min (190 DEG C, 2.16kg).But owing to adopting the homo-polypropylene of high gloss and coordinating the elastomerics that meltflow ability is higher, the product of low gloss cannot be obtained.
Chinese patent CN 103254498 A discloses a kind of low-luster polypropylene composition, said composition comprises 10 parts of polypropylene, matt master 1 ~ 6 part, toughner 1 ~ 5 part and chopped glass fiber 1 ~ 2 part containing mineral powder, said composition is applicable to the injection moulding of sub-light plastic, have after shaping that low gloss, intensity are high, the feature of good toughness, owing to being the glossiness jointly being reduced product by glass and breeze, be therefore restricted in having the automobile product of density requirements to apply.
Above-mentioned prior art and research all fail to meet the needs in market, cannot balance and realize the multinomial performances such as low gloss, low warpage, soft sense of touch simultaneously, therefore study and provide a kind of can realize simultaneously low gloss, low warpage, soft sense of touch polypropylene composition for vehicle there is the urgent market requirement.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art with not enough, primary and foremost purpose of the present invention is to provide a kind of low gloss, low warpage, soft sense of touch polypropylene composition for vehicle.
Another object of the present invention is the preparation method providing a kind of above-mentioned low gloss, low warpage, soft sense of touch polypropylene composition for vehicle.
Still a further object of the present invention is to provide above-mentioned low gloss, low warpage, the application of soft sense of touch polypropylene composition for vehicle in household items, automobile, is specially adapted in automotive trim.
Object of the present invention is realized by following proposal:
A kind of low gloss, low warpage, soft sense of touch polypropylene composition for vehicle, comprise the component of following mass percentage:
In order to realize the present invention better, described polypropylene is preferably Co-polypropylene, melt flow rate (MFR) MFR>60g/10min (230 DEG C, 2.16kg).
In order to realize the present invention better, described elastomeric melt flow rate (MFR) is preferably MFR<0.5g/10min (190 DEG C, 2.16kg).Described elastomerics can be conventional any elastomerics such as ethylene-butene copolymer, ethylene-octene copolymer, terpolymer EP rubber, be preferably the ethylene-butene copolymer, ethylene-octene copolymer, terpolymer EP rubber etc. of melt flow rate (MFR) MFR<0.5g/10min (190 DEG C, 2.16kg).
The present invention, by having carried out the restriction of melt flow rate (MFR) to raw materials such as the polypropylene used and elastomericss, uses the raw material of specified property, realizes the low gloss characteristic of product of the present invention.
In order to realize the present invention better, described filler is preferably short glass fiber, wherein glass fiber diameter preferably 8 ~ 20 μm.
In order to realize the present invention better, described compatilizer is preferably maleic anhydride inoculated polypropylene.
In order to realize the present invention better, described processing aid can be oxidation inhibitor and photostabilizer; Described oxidation inhibitor is preferably at least one in antioxidant 1010 and irgasfos 168, is more preferably antioxidant 1010 and irgasfos 168 mol ratio is the compound of 1:1; Described photostabilizer is preferably UV-3808PP5.
The present invention is by controlling the materials ratio of various raw materials used, and the smooth not warpage of product making to utilize said composition to prepare, hand touch soft sensation, and rigidity-toughness balanced.
In order to realize the present invention better further, under the prerequisite not affecting low gloss of the present invention, low warpage, the soft sense of touch polypropylene composition for vehicle impact of performance, at least one in following additive can be comprised further: fire retardant, static inhibitor, thermo-stabilizer, tinting material, lubricant, damage resistant agent etc.
Present invention also offers the preparation method of a kind of above-mentioned low gloss, low warpage, soft sense of touch polypropylene composition for vehicle, 20 ~ 48wt% polypropylene, 30 ~ 40wt% elastomerics, 1 ~ 10wt% compatilizer and 0.01 ~ 1wt% processing aid is comprised the steps: to mix, add through twin-screw extrusion owner spout, 20 ~ 30wt% filler adds from side spout, melt pelletization, obtains low gloss, low warpage, soft sense of touch polypropylene composition for vehicle.
The temperature that described twin screw extruder is each section is preferably 190 ~ 230 DEG C.
Described mixing preferably mixes 1 ~ 3 minute in high-speed mixer, and rotating speed is 1000 ~ 2000 revs/min.
Polypropene composition of the present invention has the characteristics such as low gloss, low warpage, soft sense of touch, can be widely used in household items, automobile, be specially adapted in automotive trim, as dashboard, auxiliary fasia console, column, glove box, door-plate, threshold etc.
Mechanism of the present invention is:
The present invention is by having carried out the restriction of melt flow rate (MFR) to raw materials such as the polypropylene used and elastomericss, use the raw material of specified property, realize the low gloss characteristic of product, and by controlling the materials ratio of the various raw materials used, the smooth not warpage of product making to utilize said composition to prepare, hand touch soft sensation, and rigidity-toughness balanced, can be widely used in various field, particularly Automotive interior product.
The present invention, relative to prior art, has following advantage and beneficial effect:
(1) the present invention is by having carried out the restriction of melt flow rate (MFR) to raw materials such as the polypropylene used and elastomericss, uses the raw material of specified property, realizes the low gloss characteristic of product, gives visually soft sense of touch.
(2) the present invention is by controlling the materials ratio of various raw materials used, and the smooth not warpage of product making to utilize said composition to prepare, hand touch soft sensation, and have certain rigidity and excellent toughness concurrently.
(3) low gloss of the present invention, low warpage, soft sense of touch polypropylene composition for vehicle can be widely used in the automobile inside gadgets such as dashboard, auxiliary fasia console, column, glove box, door-plate, threshold.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Now following explanation is made to the embodiment in embodiment and comparative example starting material used, but the raw material that the present invention is suitable for is not limited to these materials:
Polypropylene: EP540V, Korea S great Lin; HJ4045, Kpic.
Elastomerics: ENGAGE 7387 (MFR<0.5g/10min, 190 DEG C, 2.16kg), DOW Chemical; POE DF610 (MFR=1.2g/10min, 190 DEG C, 2.16kg), Mitsui Chemicals.
Glass fibre: ECS13-4.5-508A, megalith group.
Wollastonite: NYAD MG, Nyco SA.
Compatilizer: maleic anhydride graft PP, model is PC-1, Guangzhou Bai Chen.
Oxidation inhibitor: antioxidant 1010, full name is four [3-(3,5-di-t-butyl-4-hydroxyphenyl) propionic acid] quaternary amyl alcohol ester, model is Irganox 1010, Germany's BASF: irgasfos 168, full name is three (2,4-di-tert-butyl-phenyl) phosphorous acid ester, model is Irganox 168, German BASF.
Photostabilizer: UV-3808PP5, full name is ultraviolet light stabilizers UV-3808PP5, and model is CYASORB UV-3808 PP5, and U.S.'s cyanogen is special.
Embodiment 1: the preparation of low gloss, low warpage, soft sense of touch polypropylene composition for vehicle
By 48.5wt% copolymerization PP EP540V, 30wt% elastomerics ENGAGE 7387,1wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 20wt% glass fibre adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains low gloss of the present invention, low warpage, soft sense of touch polypropylene composition for vehicle.
Embodiment 2: the preparation of low gloss, low warpage, soft sense of touch polypropylene composition for vehicle
By 36.5wt% copolymerization PP EP540V, 35wt% elastomerics ENGAGE 7387,3wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 25wt% glass fibre adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains low gloss of the present invention, low warpage, soft sense of touch polypropylene composition for vehicle.
Embodiment 3: the preparation of low gloss, low warpage, soft sense of touch polypropylene composition for vehicle
By 19.5wt% copolymerization PP EP540V, 40wt% elastomerics ENGAGE 7387,10wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 30wt% glass fibre adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains low gloss of the present invention, low warpage, soft sense of touch polypropylene composition for vehicle.
Comparative example 1
By 48.5wt% homopolymerization PP HJ4046,30wt% elastomerics ENGAGE 7387,1wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 20wt% glass fibre adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains polypropene composition.
Comparative example 2
By 56.5wt% copolymerization PP EP540V, 10wt% elastomerics ENGAGE 7387,3wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 30wt% glass fibre adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains polypropene composition.
Comparative example 3
By 46.5wt% copolymerization PP EP540V, 30wt% elastomerics POE DF610,3wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 20wt% glass fibre adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains polypropene composition.
Comparative example 4
By 66.5wt% copolymerization PP EP540V, 20wt% elastomerics ENGAGE 7387,3wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 10wt% glass fibre adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains polypropene composition.
Comparative example 5
By 46.5wt% copolymerization PP EP540V, 30wt% elastomerics ENGAGE 7387,3wt% compatilizer PC-1 and 0.5wt% processing aid (antioxidant 1010 and each 0.1wt% of irgasfos 168, photostabilizer UV-3808PP5 0.3wt%) join in high-speed mixer mix 1 ~ 3 minute, rotating speed is 1000 ~ 2000 revs/min, obtains Preblend; Preblend adds at the main spout of twin screw extruder, and 30wt% wollastonite adds at side spout, and screw rod each district temperature is 190 ~ 230 DEG C, and namely vacuum granulation obtains polypropene composition.
Performance measurement is carried out to the polypropene composition that embodiment 1 ~ 3 and comparative example 1 ~ 5 prepare, the results are shown in Table 1, properties testing method:
(1) mechanical property: tensile property is tested by ISO 527:1993 standard; Flexural strength and modulus in flexure are tested according to ISO 178:2001 standard; Shock strength is tested by ISO 180:2000 standard.
(2) surface gloss: by ASTM D523 test material surface gloss, Ford Stucco dermatoglyph plate selected by model, angle of incidence of light 60 °.
(3) warpage: the square plate that the injection moulding length of side is 100mm, thickness is 2mm, normal temperature estimates its warpage degree after placing a day.
As can be seen from Table 1, the present invention is by having carried out the restriction of melt flow rate (MFR) to raw materials such as the polypropylene used and elastomericss, use the raw material of specified property, and by controlling the materials ratio of various raw materials used, resulting composition goods have extremely low glossiness, smooth not warpage, hand touch soft sensation.And in comparative example, when adopting the elastomerics POE of homo-polypropylene or MFR>0.5g/10min (190 DEG C, 2.16kg), the glossiness of resulting product is too high; And when the addition that glass fiber content in system limits lower than the present invention, serious warpage appears in system, and glossiness is too high; When adopting wollastonite to strengthen as filler, system rigidity declines to a great extent, and cannot meet the performance requriements of Automotive interior product.Therefore, low gloss of the present invention, low warpage, soft sense of touch polypropylene composition for vehicle have excellent properties, and rigidity-toughness balanced, can be widely used in various field, particularly Automotive interior product.
The proportioning of table 1 polypropene composition and test performance result thereof
Remarks: feel judges so that whether sense of touch is soft, and "+" represents soft-touch, and "-" represents that sense of touch is hard.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. low gloss, low warpage, a soft sense of touch polypropylene composition for vehicle, is characterized in that the component comprising following mass percentage:
Described polypropylene is Co-polypropylene, melt flow rate (MFR) MFR>60g/10min (230 DEG C, 2.16kg);
Described elastomeric melt flow rate (MFR) MFR<0.5g/10min (190 DEG C, 2.16kg).
2. low gloss according to claim 1, low warpage, soft sense of touch polypropylene composition for vehicle, is characterized in that: described filler is short glass fiber; Described compatilizer is maleic anhydride inoculated polypropylene; Described processing aid is at least one in oxidation inhibitor and photostabilizer.
3. low gloss according to claim 2, low warpage, soft sense of touch polypropylene composition for vehicle, is characterized in that: the diameter of described short glass fiber is 8 ~ 20 μm.
4. low gloss according to claim 2, low warpage, soft sense of touch polypropylene composition for vehicle, is characterized in that: described oxidation inhibitor is at least one in antioxidant 1010 and irgasfos 168; Described photostabilizer is UV-3808PP5.
5. low gloss according to claim 2, low warpage, soft sense of touch polypropylene composition for vehicle, is characterized in that: described oxidation inhibitor is antioxidant 1010 and irgasfos 168 mol ratio is the compound of 1:1.
6. low gloss according to claim 1, low warpage, soft sense of touch polypropylene composition for vehicle, is characterized in that: described elastomerics is at least one in ethylene-butene copolymer, ethylene-octene copolymer and terpolymer EP rubber.
7. low gloss according to claim 1, low warpage, soft sense of touch polypropylene composition for vehicle, is characterized in that: also include at least one in fire retardant, static inhibitor, thermo-stabilizer, tinting material, lubricant and damage resistant agent.
8. the preparation method of low gloss according to any one of claim 1 ~ 7, low warpage, soft sense of touch polypropylene composition for vehicle, it is characterized in that comprising the steps: 20 ~ 48wt% polypropylene, 30 ~ 40wt% elastomerics, 1 ~ 10wt% compatilizer and 0.01 ~ 1wt% processing aid to mix, add through twin-screw extrusion owner spout, 20 ~ 30wt% filler adds from side spout, melt pelletization, obtains low gloss, low warpage, soft sense of touch polypropylene composition for vehicle.
9. the low gloss according to any one of claim 1 ~ 7, low warpage, the application of soft sense of touch polypropylene composition for vehicle in household items, automobile.
10. the low gloss according to any one of claim 1 ~ 7, low warpage, the application of soft sense of touch polypropylene composition for vehicle in automotive trim.
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| CN105235127A (en) * | 2015-10-28 | 2016-01-13 | 沈阳名华模塑科技有限公司 | Production system for color bumper |
| CN105413979A (en) * | 2015-10-28 | 2016-03-23 | 沈阳名华模塑科技有限公司 | Method for producing colored bumpers |
| CN106280016A (en) * | 2016-08-29 | 2017-01-04 | 合肥会通新材料有限公司 | Low-density bionical PP composite material of super sub-light and preparation method thereof |
| CN106671529A (en) * | 2016-12-07 | 2017-05-17 | 安徽国风塑业股份有限公司 | Biaxially stretched polypropylene touch film |
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| CN107141604A (en) * | 2017-07-06 | 2017-09-08 | 贵州省材料产业技术研究院 | A kind of composite and preparation method and application |
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| CN108034145A (en) * | 2017-12-16 | 2018-05-15 | 贵州凯科特材料有限公司 | A kind of soft sense of touch automotive interior material of low-luster areflexia and preparation method thereof |
| CN108485166A (en) * | 2018-03-13 | 2018-09-04 | 上海普利特复合材料股份有限公司 | A kind of low smell of automobile low distributes polypropylene aesthetic resin composite material and preparation method |
| CN108641192A (en) * | 2018-06-21 | 2018-10-12 | 刘强 | A kind of production method of complex polypropylene resin new material |
| CN109762256A (en) * | 2018-12-13 | 2019-05-17 | 中广核俊尔新材料有限公司 | A kind of Soft touch polypropylene material and its preparation method and application |
| CN110229422A (en) * | 2019-07-01 | 2019-09-13 | 四川大学 | Low-warpage PP R base composite wire material and preparation method thereof for 3D printing |
| CN110964248A (en) * | 2019-11-29 | 2020-04-07 | 苏州润佳高分子材料有限公司 | Soft touch polypropylene composite material for automobile |
| CN111019235A (en) * | 2019-12-24 | 2020-04-17 | 贵州凯科特材料有限公司 | Composite material with soft touch feeling and preparation method thereof |
| CN111073145A (en) * | 2019-12-26 | 2020-04-28 | 苏州润佳高分子材料有限公司 | Fabric-touch-like polypropylene composite material for automobile |
| CN111073151A (en) * | 2020-01-10 | 2020-04-28 | 山东道恩高分子材料股份有限公司 | Low-gloss soft-touch modified thermoplastic resin and preparation method thereof |
| CN112521685A (en) * | 2020-11-23 | 2021-03-19 | 江苏金发科技新材料有限公司 | Hydrophobic polyolefin composition and preparation method thereof |
| CN113429684A (en) * | 2021-06-08 | 2021-09-24 | 金发科技股份有限公司 | Low-warpage reinforced polypropylene composition and preparation method and application thereof |
| CN114133661A (en) * | 2021-11-26 | 2022-03-04 | 苏州润佳高分子材料有限公司 | Soft touch polypropylene material and preparation method thereof |
| CN115960412A (en) * | 2023-01-10 | 2023-04-14 | 辽宁石油化工大学 | Polyolefin elastomer and preparation method thereof |
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