CN111073130A - Polypropylene compound for automobile fender with low linear expansion coefficient and preparation method thereof - Google Patents
Polypropylene compound for automobile fender with low linear expansion coefficient and preparation method thereof Download PDFInfo
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 77
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 66
- -1 Polypropylene Polymers 0.000 title claims abstract description 60
- 150000001875 compounds Chemical class 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title description 6
- 229920001577 copolymer Polymers 0.000 claims abstract description 81
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 39
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000005977 Ethylene Substances 0.000 claims abstract description 27
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 25
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 25
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims description 16
- 239000000155 melt Substances 0.000 claims description 13
- 238000005303 weighing Methods 0.000 claims description 12
- 150000002148 esters Chemical class 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 150000002989 phenols Chemical class 0.000 claims description 6
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 claims description 3
- 150000001408 amides Chemical class 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- VTJUKNSKBAOEHE-UHFFFAOYSA-N calixarene Chemical class COC(=O)COC1=C(CC=2C(=C(CC=3C(=C(C4)C=C(C=3)C(C)(C)C)OCC(=O)OC)C=C(C=2)C(C)(C)C)OCC(=O)OC)C=C(C(C)(C)C)C=C1CC1=C(OCC(=O)OC)C4=CC(C(C)(C)C)=C1 VTJUKNSKBAOEHE-UHFFFAOYSA-N 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 125000000524 functional group Chemical group 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000344 soap Substances 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 150000007970 thio esters Chemical class 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 abstract description 18
- 239000000806 elastomer Substances 0.000 abstract description 18
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 description 9
- 238000011105 stabilization Methods 0.000 description 9
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 5
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002633 Kraton (polymer) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 208000016261 weight loss Diseases 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a polypropylene compound for a low-linear expansion coefficient automobile fender, which comprises the following components in parts by weight: 29-65 parts of polypropylene, 0.1-2 parts of heat stabilizer, 0.1-1 part of processing aid, 5-20 parts of ethylene/octene copolymer, 1-7 parts of hydrogenated styrene/butadiene/styrene copolymer, 1-7 parts of ethylene/acrylate copolymer and 25-35 parts of superfine talcum powder. The polypropylene compound is prepared by adopting three elastomers of ethylene/octene copolymer, hydrogenated styrene/butadiene/styrene elastomer and ethylene/acrylate elastomer for synergistic toughening, and the polypropylene compound with low linear expansion coefficient in a temperature range of-30-85 ℃ is obtained.
Description
Technical Field
The invention relates to a polypropylene compound, in particular to a polypropylene compound for an automobile fender with a low linear expansion coefficient and a preparation method thereof.
Background
The automobile fender has the function of preventing sand and mud rolled up by the wheels from splashing to the bottom of a carriage in the running process of an automobile. At present, most automobile fenders are made of metal materials, and the metal materials are high in density and do not accord with the development trend of light weight of automobiles. Therefore, the plastic replacement of steel for the automobile fender is a development trend of the automobile industry. The polypropylene material is a preferred material for automobile light weight due to the advantages of no toxicity, environmental protection, low density, recoverability and the like, and is widely applied to automobile interior and exterior decorations and engine parts.
Traditional polypropylene composite material for car generally adopts the talcum powder to fill and increases the rigidity, simultaneously for guaranteeing its toughness, adds a large amount of thermoplastic elastomer, and the linear expansion coefficient of this kind of polypropylene material after the modification is very big, leads to the different seasons size change among the one year big on the one hand, influences the assembly of fender, also can cause simultaneously between fender and the automobile body "the face is poor", influences the car pleasing to the eye.
Disclosure of Invention
In order to overcome the defects, the invention provides a polypropylene compound for an automobile fender with a low linear expansion coefficient, which is prepared by synergistically toughening three elastomers of an ethylene/octene copolymer, a hydrogenated styrene/butadiene/styrene elastomer and an ethylene/acrylate elastomer to obtain the polypropylene compound with the low linear expansion coefficient within a temperature range of-30-85 ℃.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the polypropylene compound for the automobile fender with the low linear expansion coefficient comprises the following components in parts by weight: 29-65 parts of polypropylene, 0.1-2 parts of heat stabilizer, 0.1-1 part of processing aid, 5-20 parts of ethylene/octene copolymer, 1-7 parts of hydrogenated styrene/butadiene/styrene copolymer, 1-7 parts of ethylene/acrylate copolymer and 25-35 parts of superfine talcum powder.
Preferably, the polypropylene is homo-polypropylene, co-polypropylene or a mixture of the homo-polypropylene and the co-polypropylene, and the melt flow rate of the polypropylene is 20-1000 g/10 min.
Preferably, the heat stabilizer is at least one of phenols, amines, phosphites, complexes of acryloyl functional groups and thioesters, semi-hindered phenols, and calixarenes.
Preferably, the processing aid is at least one of low molecular esters, metal soaps, stearic acid complex esters and amides.
Preferably, the melt flow rate of the ethylene/octene copolymer is 0.5-30 g/10min, and the octene content in the copolymer is 15-42 wt%.
Preferably, the hydrogenated styrene/butadiene/styrene copolymer has a melt flow rate of 1 to 20g/10min and a styrene content of 13 to 25 wt%.
Preferably, the melt flow rate of the ethylene/acrylate copolymer is 1-50 g/10min, and the content of acrylate in the copolymer is 10-30 wt%.
Preferably, the mesh number of the superfine talcum powder is 3000-10000 meshes.
Preferably, the composition comprises the following components in parts by weight: 35-55 parts of polypropylene, 0.5-2 parts of heat stabilizer, 0.5-1 part of processing aid, 5-10 parts of ethylene/octene copolymer, 3-5 parts of hydrogenated styrene/butadiene/styrene copolymer, 3-5 parts of ethylene/acrylate copolymer and 25-35 parts of superfine talcum powder.
The invention also provides a preparation method of the polypropylene compound for the automobile fender with the low linear expansion coefficient, which comprises the following steps:
the method comprises the following steps: weighing the polypropylene, the heat stabilizer, the processing aid, the ethylene/octene copolymer, the hydrogenated styrene/butadiene/styrene copolymer and the ethylene/acrylate copolymer according to the formula ratio, and melting, mixing and dispersing in a double-screw extruder with the length-diameter ratio of 40: 1;
step two: and (3) adding the superfine talcum powder with the formula amount into a double-screw extruder from a side feed through a weightless metering scale, setting the temperature of each section of the extruder at 240 ℃, and performing extrusion granulation to finally obtain the product.
The invention has the beneficial effects that: the polypropylene composite for the automobile fender with the low linear expansion Coefficient (CLTE) is prepared by blending polypropylene, superfine talcum powder, ethylene/octene copolymer (POE), hydrogenated styrene/butadiene/Styrene Elastomer (SEBS), ethylene/acrylate elastomer, heat stabilizer and processing aid; the traditional polypropylene composite material for the automobile generally adopts ethylene/octene copolymer (POE) elastomer as a toughening agent to improve the normal-temperature and low-temperature toughness of the material, but the linear expansion coefficient of the polypropylene material modified by the pure ethylene/octene copolymer elastomer is very high, and the use standard of the automobile fender material for the linear expansion coefficient cannot be met. Therefore, the ethylene/octene copolymer, the hydrogenated styrene/butadiene/styrene elastomer and the ethylene/acrylate elastomer are innovatively adopted for synergistic toughening on the basis, wherein the hydrogenated styrene/butadiene/styrene elastomer greatly reduces the linear expansion coefficient in a low-temperature range (-30-0 ℃), the ethylene/acrylate elastomer greatly reduces the linear expansion coefficient in a high-temperature range (30-85 ℃), and finally the polypropylene composite with the low linear expansion coefficient in a temperature range of-30-85 ℃ is obtained.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The polypropylene compound for the automobile fender with the low linear expansion coefficient comprises the following components in parts by weight: 29-65 parts of polypropylene, 0.1-2 parts of heat stabilizer, 0.1-1 part of processing aid, 5-20 parts of ethylene/octene copolymer, 1-7 parts of hydrogenated styrene/butadiene/styrene copolymer, 1-7 parts of ethylene/acrylate copolymer and 25-35 parts of superfine talcum powder. In the invention, three elastomers of ethylene/octene copolymer, hydrogenated styrene/butadiene/styrene elastomer and ethylene/acrylate elastomer are adopted for synergistic toughening, and the prepared polypropylene composite has high fluidity, high rigidity, high impact and low linear expansion Coefficient (CLTE) and meets the standard requirement of automobile fender materials. The complex has the following characteristics by detection: the melt flow rate is more than or equal to 20g/10min, the flexural modulus is more than or equal to 2500MPa, and the notch impact strength is more than or equal to 30KJ/m at the temperature of 23 DEG C2Linear expansion Coefficient (CLTE) is less than or equal to 4 multiplied by 10-5。
The polypropylene is homo-polypropylene, co-polypropylene or a mixture of the homo-polypropylene and the co-polypropylene, and the melt flow rate of the polypropylene is 20-1000 g/10 min. The heat stabilizer is at least one of phenols, amines, phosphites, complexes of acryloyl functional groups and thioesters, semi-hindered phenols and calixarenes. The processing aid is at least one of low molecular weight esters, metal soaps, stearic acid composite esters and amides. The heat stabilizer is used for inhibiting the degradation of polypropylene in the processing process, and the processing aid is used for promoting the good dispersibility among the components of the blend.
The melt flow rate of the ethylene/octene copolymer is 0.5-30 g/10min, and the octene content in the copolymer is 15-42 wt%. The melt flow rate of the hydrogenated styrene/butadiene/styrene copolymer is 1-20 g/10min, and the styrene content in the copolymer is 13-25 wt%. The melt flow rate of the ethylene/acrylate copolymer is 1-50 g/10min, and the content of acrylate in the copolymer is 10-30 wt%. The mesh number of the superfine talcum powder is 3000-10000 meshes.
More preferably, the polypropylene compound for the automobile fender with the low linear expansion coefficient comprises the following components in parts by weight: 35-55 parts of polypropylene, 0.5-2 parts of heat stabilizer, 0.5-1 part of processing aid, 5-10 parts of ethylene/octene copolymer, 3-5 parts of hydrogenated styrene/butadiene/styrene copolymer, 3-5 parts of ethylene/acrylate copolymer and 25-35 parts of superfine talcum powder.
A preparation method of a polypropylene compound for an automobile fender with a low linear expansion coefficient comprises the following steps:
the method comprises the following steps: weighing the polypropylene, the heat stabilizer, the processing aid, the ethylene/octene copolymer, the hydrogenated styrene/butadiene/styrene copolymer and the ethylene/acrylate copolymer according to the formula ratio, and melting, mixing and dispersing in a double-screw extruder with the length-diameter ratio of 40: 1;
step two: and (3) adding the superfine talcum powder with the formula amount into a double-screw extruder from a side feed through a weightless metering scale, setting the temperature of each section of the extruder at 240 ℃, and performing extrusion granulation to finally obtain the product.
Preparation of the first, examples and comparative examples
Polypropylene, manufacturer: korea SK;
phenolic heat stabilizer 1010, manufacturer: basf;
phosphite heat stabilizer, manufacturer: basf;
processing aid, manufacturer: the King of Japan;
ethylene/octene copolymer POE, manufacturer: (ii) the chemistry of the dow;
hydrogenated styrene/butadiene/styrene copolymer SEBS, manufacturer: american kraton;
ethylene/acrylate copolymer, manufacturer: dupont, USA;
superfine talc powder, manufacturer: quartz.
Example 1:
54 kg of polypropylene PP BX3900 and 0.2 kgPhenolsThermal stabilizationAgent for treating cancer1010. 0.3 kg of phosphite heat stabilizer 168, 0.5 kg of processing aid EBS (ethylene bis stearamide), 5 kg of ethylene/octene copolymer POE 7447, 5 kg of hydrogenated styrene/butadiene/styrene copolymer SEBS 6154 and 5 kg of ethylene/acrylate copolymer EA101 are added into an extruder to be melted, mixed and dispersed; 30 kg of superfine talcum powder (5000 meshes) is accurately added from a side feed through a weightless type weighing scale, and is extruded and granulated at 200 ℃ to finally obtain the product.
Example 2:
51.5 kg of polypropylene PP BX3800, 0.5 kgPhenolsThermal stabilizationAgent for treating cancer1010. 0.5 kg of phosphite heat stabilizer 168, 0.5 kg of processing aid EB-FF, 6 kg of ethylene/octene copolymer POE 8137, 3 kg of hydrogenated styrene/butadiene/styrene copolymer SEBS G1657 and 3 kg of ethylene/acrylate copolymer EMA 1125C are melted, mixed and dispersed in a double-screw extruder with the length-diameter ratio of 1: 40; and (3) accurately adding 35 kg of superfine talcum powder (8000 meshes) from a side feed through a weightlessness type weighing scale, and extruding and granulating at 220 ℃ to finally obtain the product.
Example 3:
52 kg of polypropylene PP BX3920 and 1 kgPhenolsThermal stabilizationAgent for treating cancer1010. 1 kg of phosphite heat stabilizer 627A, 1 kg of processing aid zinc stearate, 10 kg of ethylene/octene copolymer POE 8677, 5 kg of hydrogenated styrene/butadiene/styrene copolymer SEBS G1654 and 5 kg of ethylene/acrylate copolymer EMA 1609AC are melted, mixed and dispersed in a double-screw extruder with the length-diameter ratio of 1: 40; 25 kg of superfine talcum powder (8000 meshes) is accurately added from a side feed through a weightless type weighing scale, and is extruded and granulated at 210 ℃, so that the product is finally obtained.
Example 4:
mixing 29 kg of PP BX3920 and 0.4 kg of PPPhenolsThermal stabilizationAgent for treating cancer1010. 0.4 kg of phosphite heat stabilizer 627A, 0.1 kg of processing aid zinc stearate, 10 kg of ethylene/octene copolymer POE 8677 and 1 kg of hydrogenated styreneMelting, mixing and dispersing the alkene/butadiene/styrene copolymer SEBS G1654 and 1 kg of ethylene/acrylate copolymer EMA 1609AC in a double-screw extruder with the length-diameter ratio of 1: 40; 35 kg of superfine talcum powder (5000 meshes) is accurately added from a side feed through a weightless type weighing scale, and is extruded and granulated at 210 ℃ to finally obtain the product.
Example 5:
mixing 35 kg of PP BX3920 and 0.1 kgPhenolsThermal stabilizationAgent for treating cancer1010. 0.4 kg of processing aid zinc stearate, 20 kg of ethylene octene copolymer POE 8677, 6 kg of hydrogenated styrene/butadiene/styrene copolymer SEBS SG1654 and 7 kg of ethylene/acrylate copolymer EMA 1609AC are melted, mixed and dispersed in a double-screw extruder with the length-diameter ratio of 1: 40; 30 kg of superfine talcum powder (8000 meshes) is accurately added from a side feed through a weightless type weighing scale, and is extruded and granulated at 210 ℃, so that the product is finally obtained.
Example 6:
65 kg of polypropylene PP BX3920 and 0.2 kg of polypropylene PPPhenolsThermal stabilizationAgent for treating cancer1010. 0.2 kg of phosphite heat stabilizer 627A, 0.8 kg of processing aid zinc stearate, 15 kg of ethylene/octene copolymer POE 8677, 7 kg of hydrogenated styrene/butadiene/styrene copolymer SEBS G1654 and 5 kg of ethylene/acrylate copolymer EMA 1609AC are melted, mixed and dispersed in a double-screw extruder with the length-diameter ratio of 1: 40; 25 kg of superfine talcum powder (8000 meshes) is accurately added from a side feed through a weightless type weighing scale, and is extruded and granulated at 210 ℃, so that the product is finally obtained.
Comparative example 1:
54 kg of polypropylene PP BX3900 and 0.2 kgPhenolsThermal stabilizationAgent for treating cancer1010. 0.3 kg of phosphite heat stabilizer 168, 0.5 kg of processing aid EBS and 15 kg of ethylene/octene copolymer POE 7447 are melted, mixed and dispersed in a double-screw extruder with the length-diameter ratio of 1: 40; 30 kg of superfine talcum powder (5000 meshes) is accurately added from a side feed through a weightless type weighing scale, and is extruded and granulated at 200 ℃ to finally obtain the product.
Comparative example 2:
51.5 kg of polypropylene PP BX3800, 0.5 kgPhenolsThermal stabilizationAgent for treating cancer1010. 0.5 kg of phosphorous acidThe ester heat stabilizer 168, 0.5 kg of processing aid EB-FF and 12 kg of ethylene octene copolymer POE 8137 are melted, mixed and dispersed in a double-screw extruder with the length-diameter ratio of 1: 40; and (3) accurately adding 35 kg of superfine talcum powder (8000 meshes) from a side feed through a weightlessness type weighing scale, and extruding and granulating at 220 ℃ to finally obtain the product.
Comparative example 3:
52 kg of polypropylene PP BX3920 and 1 kgPhenolsThermal stabilizationAgent for treating cancer1010. 1 kg of phosphite heat stabilizer 627A, 1 kg of processing aid zinc stearate and 20 kg of ethylene octene copolymer POE 8677 are melted, mixed and dispersed in a double-screw extruder with the length-diameter ratio of 1: 40; adding 25 kg of superfine talcum powder (8000 meshes) from a side feed by a weight-loss type weighing scale, and extruding and granulating at 210 ℃ to finally obtain the product.
Second, performance test
The results of examples and comparative examples are shown in tables 1 and 2
Table 1:
table 2:
as can be seen from the test results, the linear expansion coefficients of the examples 1-8 are significantly lower than those of the comparative examples 1-3, so that the polypropylene compound with lower linear expansion coefficient can be obtained by adopting three elastomers, namely ethylene/octene copolymer, hydrogenated styrene/butadiene/styrene copolymer and ethylene/acrylate copolymer for synergistic toughening.
It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The polypropylene compound for the automobile fender with the low linear expansion coefficient is characterized in that: comprises the following components in parts by weight:
29-65 parts of polypropylene, 0.1-2 parts of heat stabilizer, 0.1-1 part of processing aid, 5-20 parts of ethylene/octene copolymer, 1-7 parts of hydrogenated styrene/butadiene/styrene copolymer, 1-7 parts of ethylene/acrylate copolymer and 25-35 parts of superfine talcum powder.
2. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: the polypropylene is homo-polypropylene, co-polypropylene or a mixture of the homo-polypropylene and the co-polypropylene, and the melt flow rate of the polypropylene is 20-1000 g/10 min.
3. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: the heat stabilizer is at least one of phenols, amines, phosphites, complexes of acryloyl functional groups and thioesters, semi-hindered phenols and calixarenes.
4. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: the processing aid is at least one of low molecular weight esters, metal soaps, stearic acid composite esters and amides.
5. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: the melt flow rate of the ethylene/octene copolymer is 0.5-30 g/10min, and the octene content in the copolymer is 15-42 wt%.
6. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: the melt flow rate of the hydrogenated styrene/butadiene/styrene copolymer is 1-20 g/10min, and the styrene content in the copolymer is 13-25 wt%.
7. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: the melt flow rate of the ethylene/acrylate copolymer is 1-50 g/10min, and the content of acrylate in the copolymer is 10-30 wt%.
8. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: the mesh number of the superfine talcum powder is 3000-10000 meshes.
9. A polypropylene composite for automobile fender panels with low linear expansion coefficient according to claim 1, wherein: comprises the following components in parts by weight:
35-55 parts of polypropylene, 0.5-2 parts of heat stabilizer, 0.5-1 part of processing aid, 5-10 parts of ethylene/octene copolymer, 3-5 parts of hydrogenated styrene/butadiene/styrene copolymer, 3-5 parts of ethylene/acrylate copolymer and 25-35 parts of superfine talcum powder.
10. A method for preparing a polypropylene composite for automobile fender panels with low linear expansion coefficient according to any one of claims 1 to 9, wherein: the method comprises the following steps:
the method comprises the following steps: weighing the polypropylene, the heat stabilizer, the processing aid, the ethylene/octene copolymer, the hydrogenated styrene/butadiene/styrene copolymer and the ethylene/acrylate copolymer according to the formula ratio, and melting, mixing and dispersing in a double-screw extruder with the length-diameter ratio of 40: 1;
step two: and (3) adding the superfine talcum powder with the formula amount into a double-screw extruder from a side feed through a weightless metering scale, setting the temperature of each section of the extruder at 240 ℃, and performing extrusion granulation to finally obtain the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393397.4A CN111073130A (en) | 2019-12-30 | 2019-12-30 | Polypropylene compound for automobile fender with low linear expansion coefficient and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393397.4A CN111073130A (en) | 2019-12-30 | 2019-12-30 | Polypropylene compound for automobile fender with low linear expansion coefficient and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736182A (en) * | 2021-09-26 | 2021-12-03 | 金旸（厦门）新材料科技有限公司 | Polypropylene composite material with low linear expansion coefficient and preparation method thereof |
| CN114031846A (en) * | 2021-11-11 | 2022-02-11 | 金发科技股份有限公司 | Polypropylene composition with low plastic deformation and high elastic recovery, and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104558842A (en) * | 2014-12-30 | 2015-04-29 | 南京金杉汽车工程塑料有限责任公司 | Bumper material with low linear expansion coefficient and preparation method of bumper material |
| CN106046535A (en) * | 2016-05-31 | 2016-10-26 | 上海金发科技发展有限公司 | Scratch-resistant polypropylene composite and preparation method thereof |
| CN108003476A (en) * | 2017-11-21 | 2018-05-08 | 天津金发新材料有限公司 | A kind of height leap high just, cold-hot alternation, low linear polypropylene automotive interior material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104558842A (en) * | 2014-12-30 | 2015-04-29 | 南京金杉汽车工程塑料有限责任公司 | Bumper material with low linear expansion coefficient and preparation method of bumper material |
| CN106046535A (en) * | 2016-05-31 | 2016-10-26 | 上海金发科技发展有限公司 | Scratch-resistant polypropylene composite and preparation method thereof |
| CN108003476A (en) * | 2017-11-21 | 2018-05-08 | 天津金发新材料有限公司 | A kind of height leap high just, cold-hot alternation, low linear polypropylene automotive interior material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736182A (en) * | 2021-09-26 | 2021-12-03 | 金旸（厦门）新材料科技有限公司 | Polypropylene composite material with low linear expansion coefficient and preparation method thereof |
| CN114031846A (en) * | 2021-11-11 | 2022-02-11 | 金发科技股份有限公司 | Polypropylene composition with low plastic deformation and high elastic recovery, and preparation method and application thereof |
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