CN117447835A - Self-lubricating high-strength thermoplastic elastomer and preparation method thereof - Google Patents
Self-lubricating high-strength thermoplastic elastomer and preparation method thereof Download PDFInfo
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- CN117447835A CN117447835A CN202311333815.7A CN202311333815A CN117447835A CN 117447835 A CN117447835 A CN 117447835A CN 202311333815 A CN202311333815 A CN 202311333815A CN 117447835 A CN117447835 A CN 117447835A
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- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 43
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 38
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 33
- 239000004014 plasticizer Substances 0.000 claims abstract description 33
- 239000004945 silicone rubber Substances 0.000 claims abstract description 29
- 239000000945 filler Substances 0.000 claims abstract description 23
- 239000000314 lubricant Substances 0.000 claims abstract description 22
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 20
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 19
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 19
- 239000004611 light stabiliser Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims description 29
- -1 methyl vinyl phenyl Chemical group 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 11
- 229920001296 polysiloxane Polymers 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 9
- KDGNCLDCOVTOCS-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy propan-2-yl carbonate Chemical compound CC(C)OC(=O)OOC(C)(C)C KDGNCLDCOVTOCS-UHFFFAOYSA-N 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims description 5
- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 5
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 5
- 229920006132 styrene block copolymer Polymers 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 4
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 4
- OJOWICOBYCXEKR-KRXBUXKQSA-N (5e)-5-ethylidenebicyclo[2.2.1]hept-2-ene Chemical compound C1C2C(=C/C)/CC1C=C2 OJOWICOBYCXEKR-KRXBUXKQSA-N 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- TVJPBVNWVPUZBM-UHFFFAOYSA-N [diacetyloxy(methyl)silyl] acetate Chemical class CC(=O)O[Si](C)(OC(C)=O)OC(C)=O TVJPBVNWVPUZBM-UHFFFAOYSA-N 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 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 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- PRBHEGAFLDMLAL-GQCTYLIASA-N (4e)-hexa-1,4-diene Chemical compound C\C=C\CC=C PRBHEGAFLDMLAL-GQCTYLIASA-N 0.000 claims description 2
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 2
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 235000010290 biphenyl Nutrition 0.000 claims description 2
- 239000004305 biphenyl Substances 0.000 claims description 2
- 125000006267 biphenyl group Chemical group 0.000 claims description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 2
- 229920005560 fluorosilicone rubber Polymers 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 235000019359 magnesium stearate Nutrition 0.000 claims description 2
- 239000010690 paraffinic oil Substances 0.000 claims description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 1
- 239000004408 titanium dioxide Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 15
- 230000032683 aging Effects 0.000 abstract description 2
- 238000001746 injection moulding Methods 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 description 14
- 239000005060 rubber Substances 0.000 description 13
- 238000002156 mixing Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 229920005629 polypropylene homopolymer Polymers 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- IPJGAEWUPXWFPL-UHFFFAOYSA-N 1-[3-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC(N2C(C=CC2=O)=O)=C1 IPJGAEWUPXWFPL-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 229920007019 PC/ABS Polymers 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- BPYFPNZHLXDIGA-UHFFFAOYSA-N diphenylsilicon Chemical compound C=1C=CC=CC=1[Si]C1=CC=CC=C1 BPYFPNZHLXDIGA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- HIHIPCDUFKZOSL-UHFFFAOYSA-N ethenyl(methyl)silicon Chemical group C[Si]C=C HIHIPCDUFKZOSL-UHFFFAOYSA-N 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000006459 hydrosilylation reaction Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- NCWQJOGVLLNWEO-UHFFFAOYSA-N methylsilicon Chemical group [Si]C NCWQJOGVLLNWEO-UHFFFAOYSA-N 0.000 description 1
- 238000013386 optimize process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 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
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a self-lubricating high-strength thermoplastic elastomer and a preparation method thereof, wherein the self-lubricating high-strength thermoplastic elastomer is prepared from the following components in parts by weight: 100 parts of ethylene propylene diene monomer rubber, 100-150 parts of silicone rubber, 80-200 parts of polyolefin resin, 200-300 parts of thermoplastic elastomer, 80-150 parts of plasticizer, 0-120 parts of filler, 5-20 parts of compatilizer, 2-20 parts of cross-linking agent, 2-20 parts of auxiliary cross-linking agent, 1-20 parts of lubricant, 1-20 parts of antioxidant and 1-20 parts of light stabilizer. The self-lubricating high-strength thermoplastic elastomer material prepared by the invention can be continuously produced, and the material with good temperature resistance, ageing resistance, self-lubricating and scratch resistance can be obtained by a two-step method, and meanwhile, the process stability is high, so that the self-lubricating high-strength thermoplastic elastomer material can be widely applied to the fields of automobile anti-skid pads, injection molding triangular windows, lifting guide rail materials and the like.
Description
Technical Field
The invention relates to the technical field of thermoplastic elastomer materials, in particular to a self-lubricating high-strength thermoplastic elastomer for automobile parts and a preparation method thereof.
Background
The thermoplastic elastomer used as the third-generation rubber has both the elasticity of the rubber and the plasticity of the plastic, can be similar to the rubber in the aspects of function, appearance, touch feeling and the like, but is superior to the rubber in the aspects of energy conservation and environmental protection. With the continuous development of economy and society, people pursue higher and higher texture of products in the fields of automobile industry, building material home, electronic appliances, medical and health products, consumer products and the like, such as softening of automobile interiors and lightening of automobile bodies, so that rubber products except pneumatic tires are sought to be replaced by using thermoplastic elastomers.
There are a number of cases where thermoplastic elastomer materials are used in automotive interior, exterior and sealing products. However, most injection molded thermoplastic elastomer materials have a large surface friction coefficient, poor abrasion resistance and scratch resistance, and the existing thermoplastic elastomers with good scratch resistance suffer from the defects of high price, low yield, poor weather resistance, poor hydrolysis resistance and the like. In addition, the extrusion molding product has the problems of complex process and high energy consumption. These have limited the use of thermoplastic elastomers in automotive interior and exterior trim and seals where self-lubricating, scratch, weather, hydrolysis and silence are desirable.
Accordingly, a self-lubricating high-strength thermoplastic elastomer applied to automobile parts has been proposed to solve the above problems. Meanwhile, the material has high production process stability, can be continuously produced, and can obtain the material with good temperature resistance, ageing resistance, self-lubrication and scratch resistance by a two-step method.
Disclosure of Invention
The invention aims to provide a self-lubricating high-strength thermoplastic elastomer for automobile parts; the thermoplastic elastomer has self-lubricating property and excellent weather resistance, hydrolysis resistance and mechanical strength, so as to solve the requirements of the thermoplastic elastomer in the prior art on self-lubricating property, scratch resistance, weather resistance and high strength.
The invention further aims to provide a preparation method of the self-lubricating high-strength thermoplastic elastomer applied to automobile parts, which has the advantages of simple process, high stability, easiness in control and continuous production.
The invention adopts the following technical scheme to solve the problems:
the self-lubricating high-strength thermoplastic elastomer for the automobile parts is prepared from the following components in parts by weight: 100 parts of Ethylene Propylene Diene Monomer (EPDM)
100-150 parts of silicon rubber
80-200 parts of polyolefin resin
200-300 parts of thermoplastic elastomer
80-150 parts of plasticizer
0-120 parts of filler
5-20 parts of compatilizer
2-20 parts of cross-linking agent
2-20 parts of auxiliary cross-linking agent
1-20 parts of lubricant
Antioxidant 1-20 parts
1-20 parts of light stabilizer.
Preferably, the third monomer in the ethylene propylene diene monomer provided by the invention is one of ethylidene norbornene, dicyclopentadiene and 1, 4-hexadiene, and is preferably ethylidene norbornene; the third monomer content of the ethylene propylene diene monomer is 3-12%, preferably 4.5%; the Mooney viscosity number of the ethylene propylene diene monomer is 25-110, preferably 61.
Preferably, the silicone rubber is at least one of methyl silicone rubber, methyl vinyl phenyl silicone rubber, and fluorosilicone rubber.
Preferably, the polyolefin resin provided by the invention is one or more of homo-polypropylene, co-polypropylene, polyethylene and ethylene octene copolymer.
Preferably, the thermoplastic elastomer provided by the invention is one or more of styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, polyester polyurethane elastomer, polyether polyurethane elastomer and aliphatic polyurethane elastomer.
Preferably, the plasticizer provided by the invention has a flash point of more than 200 ℃ and a kinematic viscosity of more than 100mm at 40 DEG C 2 One or more blends of paraffinic, naphthenic, aromatic, linear paraffinic oils.
Preferably, the filler provided by the invention is at least one of calcium carbonate, talcum powder, kaolin, mica, wollastonite, barium sulfate, carbon black, white carbon black and titanium pigment. Further, the particle size of the filler is not more than 6000 mesh.
Preferably, the compatilizer is one or more of TPU-g-MAH, PP-g-MAH, SEBS-g-MAH, PP-g-St, PP-g-GMA and silicone rubber-ethylene vinyl acetate copolymer. Further, the grafting ratio is not less than 5%
Preferably, the lubricant provided by the invention is one or more of polysiloxane, silicone master batch, erucamide, zinc stearate, magnesium stearate and hydrogen-containing silicone oil.
Preferably, the cross-linking agent provided by the invention is one or more of isopropyl tert-butyl peroxycarbonate, phenolic resin, modified methyl triacetoxy silane, octamethyl cyclotetrasiloxane and epoxy oligosiloxane.
Preferably, the auxiliary cross-linking agent provided by the invention is one or more of bismaleimide, trialkenyl methyl triisocyanurate, triallyl isocyanurate, N' -m-phenylene bismaleimide, diphenyl silol and triallyl cyanurate.
Another object of the present invention is to provide a method for producing the above thermoplastic elastomer, comprising the steps of:
(1) Sequentially adding 20-30wt% of ethylene propylene diene monomer rubber, silicone rubber, thermoplastic elastomer and plasticizer into a high-speed stirrer, stirring at a speed of 100-500r/min for 10-30 min, and standing for 0.5-2 hours; adding polyolefin resin, filler, compatilizer, lubricant, antioxidant and light stabilizer, and stirring at the speed of 100-500r/min for 5-10 min to obtain a mixture;
(2) Continuously and quantitatively adding the mixture in the step (1) to the first section of the solid conveying area of the extruder by using a metering pump, continuously and quantitatively adding 30-40wt% of plasticizer in the front section of the extruder by using the metering pump, vacuumizing in the tail section of the extruder by using a vacuum pump, and melting, extruding and granulating by using the extruder to obtain an intermediate;
(3) And (3) continuously adding the intermediate prepared in the step (2), the cross-linking agent, the auxiliary cross-linking agent and the rest plasticizer into the first section of the solid conveying area of the extruder by using a metering pump, vacuumizing at the tail end of the extruder by using a vacuum pump, and obtaining the self-lubricating high-strength thermoplastic elastomer through melting, extrusion and granulation of the extruder.
The silicon rubber and the ethylene propylene diene monomer are mainly block rubber, and the block rubber needs to be cut into small particles which can be added into a stirrer and a double-screw extruder before use.
Preferably, the extruders in the steps (2) and (3) are all co-rotating double-screw extruders, the feeding speed is 60-300r/min, the screw speed is 200-500r/min, and the length-diameter ratio of the screws is 52-64.
The temperature of the first section of the solid conveying area of the extruder is not more than 120 ℃, and the temperature of the other sections is 150-220 ℃.
The invention has the beneficial effects that:
the self-lubricating high-strength thermoplastic elastomer prepared by the invention takes Ethylene Propylene Diene Monomer (EPDM), silicone rubber and the like as main materials, a self-lubricating dynamic vulcanized rubber/resin mixture is obtained, a high-efficiency compatilizer and a lubricant are introduced, and the mixture system has excellent dispersibility and self-lubricating property through reasonable proportioning and processing technology, and has the characteristics of excellent weather resistance and wide application range and hydrolysis resistance.
The thermoplastic elastomer material prepared by processing EPDM, silicone rubber, polyolefin resin, thermoplastic elastomer, plasticizer, filler, compatilizer, cross-linking agent, auxiliary cross-linking agent, lubricant, antioxidant and light stabilizer according to a certain proportion and technical conditions can adjust different hardness and touch feeling according to customer requirements, has good sealing, self-lubricating, silencing, mechanical property and human body contact safety, and can be used for interior parts and door and window sealing parts in contact with human body in automobile parts. And the product has strong processability, high temperature resistance and low temperature resistance and environmental change performance.
Meanwhile, the self-lubricating high-strength thermoplastic elastomer can be produced by a reasonable production process design and optimized production steps through a two-step extrusion method, and the production process is simple in process, stable, easy to control, environment-friendly and low in equipment requirement, and is beneficial to large-scale industrial production.
According to the invention, through integrating the dynamic vulcanization process of the EPDM and the silicone rubber, the energy consumption is reduced, the productivity is improved, the plasticizer is added in batches and is synchronously integrated into the production process, so that the solvent resistance and the heat resistance of the material can be effectively improved, the productivity can be improved, and the energy consumption is reduced. In addition, in the optimized process, the production of the final finished product can be completed by a two-step extrusion method. In the product obtained by the method, the thermoplastic elastomer, the EPDM and the silicone rubber can be well dispersed in the continuous phase, and meanwhile, excellent self-lubricating property, scratch resistance, weather resistance and high mechanical strength are maintained.
The plasticizer is added for three times in the invention, so that the plasticizing effect of each component can be effectively ensured, uneven plasticizing is avoided, meanwhile, the processing technology difficulty can be reduced to a certain extent, the production stability is improved, and the adaptive screw and the technology range are wider. Meanwhile, the cross-linking agent is added after the step-by-step mixing, so that the dispersion and the dosage of the cross-linking agent can be effectively controlled, the cross-linking degree can be conveniently controlled, and the phenomenon of over-vulcanization or insufficient vulcanization is avoided.
The self-lubricating high-strength thermoplastic elastomer prepared by the invention can be used as a raw material of automobile parts.
Detailed Description
The invention or the invention is further illustrated by means of specific examples.
The percentages (%) in the following examples are mass percentages.
Example 1
The self-lubricating high-strength thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of Ethylene Propylene Diene Monomer (EPDM), 100 parts of silicone rubber, 100 parts of polyolefin resin, 250 parts of thermoplastic elastomer, 120 parts of plasticizer, 80 parts of filler, 10 parts of compatilizer, 8 parts of cross-linking agent, 12 parts of auxiliary cross-linking agent, 12 parts of lubricant, 5 parts of antioxidant and 8 parts of light stabilizer.
In this embodiment: the silicone rubber is methyl vinyl silicone rubber,
the polyolefin resin is a blend of 30% of homopolypropylene, 40% of copolymerized polypropylene and 30% of ethylene octene copolymer in mass ratio,
the thermoplastic elastomer is selected from 40% of styrene-butadiene-styrene block copolymer and 60% of polyether polyurethane elastomer,
the plasticizer has a flash point of more than 200 ℃ and a kinematic viscosity of more than 100mm at 40 DEG C 2 A/s cycloparaffin oil,
the filler is 1250-mesh calcium carbonate,
the compatilizer is a mixture of TPU-g-MAH with the grafting rate of 30 percent and 6 percent and PP-g-MAH with the grafting rate of 70 percent and 8 percent,
the lubricant is a silicone master batch which is prepared from a silicone resin,
the cross-linking agent is 50% of isopropyl tert-butyl peroxycarbonate and 50% of epoxy oligosiloxane,
the auxiliary cross-linking agent is 50% of bismaleimide and 50% of diphenyl silicon glycol;
the antioxidant is formed by mixing 1010 and 168 according to the mass ratio of 1:1;
the light stabilizer is prepared by mixing 329 and UV-P according to the mass ratio of 1:1;
the silicon rubber and the ethylene propylene diene monomer are mainly block rubber, and the block rubber needs to be cut into small particles which can be added into a stirrer and a double-screw extruder before use.
The preparation method of the self-lubricating high-strength thermoplastic elastomer specifically comprises the following steps:
(1) Sequentially adding ethylene propylene diene monomer rubber, silicone rubber, thermoplastic elastomer and 30wt% of plasticizer into a high-speed stirrer, stirring at 400r/min for 15 minutes, and standing for 1 hour; adding polyolefin resin, filler, compatilizer, lubricant, antioxidant and light stabilizer, and stirring at 400r/min for 5 min to obtain a mixture;
(2) Continuously and quantitatively adding the mixture into the first section of a solid conveying area of an extruder by using a metering pump, continuously and quantitatively adding 30wt% of plasticizer into the front section of the extruder by using the metering pump, vacuumizing the rear section of the extruder by using a vacuum pump, and obtaining an intermediate through melting, extruding and granulating of the extruder;
(3) And (3) respectively carrying out continuous quantitative addition of the intermediate, the cross-linking agent, the auxiliary cross-linking agent and the residual plasticizer by using a metering pump at the front section of a solid conveying area of the extruder, carrying out vacuumizing treatment at the tail end of the extruder by using a vacuum pump, and carrying out melting, extrusion and granulation of the extruder to obtain the self-lubricating high-strength thermoplastic elastomer.
The extruders in the steps (2) and (3) are all homodromous double-screw extruders, the feeding rotating speed is 100r/min, the rotating speed of the screw is 300r/min, and the length-diameter ratio of the screw is 64. The temperature of the first section of the solid conveying zone of the extruder is 80 ℃, the temperature of the front section of the extruder is 170 ℃, and the temperature of the other sections is 200 ℃.
Example 2
The self-lubricating high-strength thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of Ethylene Propylene Diene Monomer (EPDM), 150 parts of silicone rubber, 100 parts of polyolefin resin, 280 parts of thermoplastic elastomer, 100 parts of plasticizer, 60 parts of filler, 12 parts of compatilizer, 10 parts of cross-linking agent, 14 parts of auxiliary cross-linking agent, 15 parts of lubricant, 8 parts of antioxidant and 12 parts of light stabilizer.
In this embodiment: the silicone rubber is methyl vinyl phenyl silicone rubber,
the polyolefin resin is selected from copolymerized polypropylene with the mass ratio of 80 percent and ethylene octene copolymer with the mass ratio of 20 percent,
the thermoplastic elastomer is styrene-ethylene-butylene-styrene block copolymer,
the plasticizer has a flash point of more than 200 ℃ and a kinematic viscosity of more than 100mm at 40 DEG C 2 A/s cycloparaffin oil,
the filler is talcum powder with the particle size of 2500 meshes,
the compatilizer is a mixture of 50 percent of silicon rubber-ethylene vinyl acetate copolymer and 50 percent of SEBS-g-MAH with the grafting rate of 10 percent,
the lubricant is hydrogen-containing silicone oil,
the cross-linking agent is 50% of isopropyl tert-butyl peroxycarbonate and 50% of modified methyl triacetoxy silane,
the auxiliary cross-linking agent is 50% of bismaleimide and 50% of triallyl cyanurate,
the antioxidant is formed by mixing 1010 and 168 according to the mass ratio of 1:1;
the light stabilizer is prepared by mixing 329 and UV-P according to the mass ratio of 1:1;
the silicon rubber and the ethylene propylene diene monomer are mainly block rubber, and the block rubber needs to be cut into small particles which can be added into a stirrer and a double-screw extruder before use.
The preparation method of the self-lubricating high-strength thermoplastic elastomer specifically comprises the following steps:
(1) Sequentially adding ethylene propylene diene monomer rubber, silicone rubber, thermoplastic elastomer and 25wt% of plasticizer into a high-speed stirrer, stirring at the speed of 300r/min for 10 minutes, and standing for 0.5 hour; then the polyolefin resin, the filler, the compatilizer, the lubricant, the antioxidant and the light stabilizer are put into a high-speed stirrer together, and stirred for 10 minutes at the speed of 500r/min to obtain a mixture;
(2) Continuously and quantitatively adding the mixture into the first section of the solid conveying area of the extruder by using a metering pump, continuously and quantitatively adding 40wt% of plasticizer into the front section of the extruder by using the metering pump, vacuumizing the rear section of the extruder by using a vacuum pump, and melting, extruding and granulating by using the extruder to obtain an intermediate;
(3) And respectively carrying out continuous quantitative addition of the intermediate, the cross-linking agent, the auxiliary cross-linking agent and the residual plasticizer by using a metering pump at the first section of the solid conveying area of the extruder, carrying out vacuumizing treatment by using a vacuum pump at the tail end of the extruder, and carrying out melting, extrusion and granulation of the extruder to obtain the self-lubricating high-strength thermoplastic elastomer.
The extruders in the steps (3) and (2) are all homodromous double-screw extruders, the feeding rotating speed is 120r/min, the rotating speed of the screw is 400r/min, and the length-diameter ratio of the screw is 64. The temperature of the first section of the solid conveying area of the extruder is 80 ℃, the temperature of the front section of the extruder is 180 ℃, and the temperature of the other sections is 190 ℃.
Example 3
The self-lubricating high-strength thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of Ethylene Propylene Diene Monomer (EPDM), 150 parts of silicone rubber, 80 parts of polyolefin resin, 300 parts of thermoplastic elastomer, 100 parts of plasticizer, 120 parts of filler, 12 parts of compatilizer, 15 parts of cross-linking agent, 20 parts of auxiliary cross-linking agent, 20 parts of lubricant, 8 parts of antioxidant and 14 parts of light stabilizer.
In this embodiment: the silicon rubber is selected from silicon fluororubber,
the polyolefin resin is selected from 50% of homo-polypropylene and 50% of ethylene octene copolymer in mass ratio,
the thermoplastic elastomer is selected from a styrene-ethylene-butylene-styrene block copolymer with the mass ratio of 30 percent and an aliphatic polyurethane elastomer with the mass ratio of 70 percent,
the plasticizer has a flash point of more than 200 ℃ and a kinematic viscosity of more than 100mm at 40 DEG C 2 A/s cycloparaffin oil,
the filler is 6000 meshes of mica,
the compatilizer is a mixture of TPU-g-MAH with the grafting rate of 50 percent and TPU-g-MAH with the grafting rate of 12 percent and SEBS-g-MAH with the grafting rate of 50 percent and 8 percent,
the lubricant is a polysiloxane, and the lubricant is a silicone,
the cross-linking agent is 30 percent of phenolic resin and 70 percent of octamethyl cyclotetrasiloxane,
the auxiliary cross-linking agent is 50 percent of N, N' -m-phenylene bismaleimide and 50 percent of triallyl cyanurate,
the antioxidant is formed by mixing 1010 and 168 according to the mass ratio of 1:1;
the light stabilizer is prepared by mixing 329 and UV-P according to the mass ratio of 1:1;
the silicon rubber and the ethylene propylene diene monomer are mainly block rubber, and the block rubber needs to be cut into small particles which can be added into a stirrer and a double-screw extruder before use.
The preparation method of the self-lubricating high-strength thermoplastic elastomer specifically comprises the following steps:
(1) Sequentially adding ethylene propylene diene monomer rubber, silicone rubber, thermoplastic elastomer and 30wt% of plasticizer into a high-speed stirrer, stirring at 500r/min for 10 minutes, and standing for 2 hours; then the polyolefin resin, the filler, the compatilizer, the lubricant, the antioxidant and the light stabilizer are put into a high-speed stirrer together, and stirred at the speed of 300r/min for 8 minutes to obtain a mixture;
(2) Continuously and quantitatively adding the mixture into the first section of a solid conveying area of an extruder by using a metering pump, continuously and quantitatively adding 400wt% of plasticizer into the front section of the extruder by using the metering pump, vacuumizing the rear section of the extruder by using a vacuum pump, and melting, extruding and granulating by using the extruder to obtain an intermediate;
(3) And (3) respectively carrying out continuous quantitative addition of the intermediate, the cross-linking agent, the auxiliary cross-linking agent and the residual plasticizer by using a metering pump at the front section of the solid conveying area of the extruder, carrying out vacuumizing treatment at the tail end of the extruder by using a vacuum pump, and carrying out melting, extrusion and granulation of the extruder to obtain the self-lubricating high-strength thermoplastic elastomer.
The extruders in the steps (3) and (2) are all homodromous double-screw extruders, the feeding rotating speed is 120r/min, the screw rotating speed is 350r/min, and the length-diameter ratio of the screw is 64. The temperature of the first section of the solid conveying area of the extruder is 60 ℃, the temperature of the front section of the extruder is 160 ℃, and the temperature of the other sections is 185 ℃.
Comparative example 1:
the processing technique is the same as in example 1, but the raw materials and the amounts used are different:
the self-lubricating high-strength thermoplastic elastomer comprises the following raw materials in parts by weight: 100 parts of Ethylene Propylene Diene Monomer (EPDM), 120 parts of silicone rubber elastomer, 100 parts of polyolefin resin, 200 parts of thermoplastic elastomer, 100 parts of plasticizer, 120 parts of filler, 12 parts of compatilizer, 15 parts of cross-linking agent, 10 parts of auxiliary cross-linking agent, 10 parts of lubricant, 8 parts of antioxidant and 14 parts of light stabilizer.
The silicon rubber is methyl silicon rubber,
the polyolefin resin is selected from 50% of homo-polypropylene and 50% of ethylene octene copolymer in mass ratio,
the thermoplastic elastomer is selected from a styrene-ethylene-butylene-styrene block copolymer with a mass ratio of 30 percent and a polyester polyurethane elastomer with a mass ratio of 70 percent,
the plasticizer has a flash point of more than 200 ℃ and a kinematic viscosity of more than 100mm at 40 DEG C 2 A/s cycloparaffin oil,
the filler is 3500-mesh white carbon black,
the compatilizer is a mixture of TPU-g-MAH with the grafting rate of 50 percent and SEBS-g-MAH with the grafting rate of 6 percent,
the lubricant is a silicone master batch which is prepared from a silicone resin,
the cross-linking agent is 40 percent of isopropyl tert-butyl peroxycarbonate and 60 percent of octamethyl cyclotetrasiloxane,
the auxiliary cross-linking agent is 50 percent of N, N' -m-phenylene bismaleimide and 50 percent of triallyl cyanurate,
the antioxidant is formed by mixing 1010 and 168 according to the mass ratio of 1:1;
the light stabilizer is prepared by mixing 329 and UV-P according to the mass ratio of 1:1.
Comparative example 2:
the raw materials and amounts were the same as in example 1, except for the preparation steps:
the preparation method specifically comprises the following steps:
(1) Adding ethylene propylene diene monomer, polyolefin resin, 50% of filler, lubricant and 50% of antioxidant into a high-speed stirrer, maintaining at 400r/min, and stirring for 10min to obtain a premix A;
(2) Adding the premix A into an extruder, controlling the processing temperatures of a plasticizing melting zone and a melt conveying zone, continuously and quantitatively adding the premix A by using a metering pump at the first section of the solid conveying zone of the extruder, adding 50% of plasticizer by using the metering pump at the front section of the extruder, vacuumizing by using a vacuum pump at the tail section of the extruder, and melting, extruding and granulating the premix by using the extruder to obtain a mixture B;
(3) Adding the mixture B into an extruder, controlling the processing temperatures of a plasticizing melting zone and a melt conveying zone, respectively carrying out continuous quantitative addition of the mixture B, all isopropyl tert-butyl peroxycarbonate and all bismaleimide by using a metering pump at the first section of the solid conveying zone of the extruder, carrying out vacuumizing treatment at the tail end of the extruder by using a vacuum pump, wherein the vacuum pressure is lower than 0.1MPa, and carrying out melting, extrusion and granulation by using the extruder to obtain a mixture C;
(4) Adding methyl vinyl phenyl silicone rubber and polyether polyurethane elastomer into a high-speed stirrer, keeping 400r/min, and stirring for 10min to obtain a premix D;
(5) Adding the premix D into an internal mixer, heating to 120 ℃, heating to the rotating speed of 50r/min, starting to add the rest filler and the rest antioxidant after 10 minutes, starting to add all epoxy oligosiloxane and diphenyl silicon diol after 10 minutes, heating to 170 ℃, vulcanizing for 12 minutes, taking out, and cutting to obtain a mixture E;
(6) Adding the styrene-butadiene-styrene block copolymer and the rest plasticizer into a high-speed stirrer to keep 200r/min, stirring for 20 min, standing for 2h, adding the mixture C, the mixture E and the light stabilizer, keeping 200r/min, and stirring for 10min to obtain a mixture F;
(7) Adding the mixture F into an extruder, controlling the processing temperatures of a plasticizing melting zone and a melt conveying zone, continuously and quantitatively adding the mixture F by a metering pump at the first section of the solid conveying zone of the extruder, vacuumizing at the tail end of the extruder by a vacuum pump, wherein the vacuum pressure is lower than 0.1MPa, and obtaining a target product through melting, extruding and granulating of the extruder.
In the steps (2), (3) and (7), the extruder is a homodromous double-screw extruder, the feeding rotating speed is 120r/min, the screw rotating speed is 350r/min, the length-diameter ratio of the screw is 56, the temperature of the first section is 90 ℃, and the temperature of the other sections is 200 ℃.
Detection result
The test method is as follows:
hardness, measurement standard is ISO 7619-1, A type;
tensile strength, test standard is ISO 37-1, tensile test rate is 500mm/min;
the tearing strength is measured according to ISO 34-1, the method B selects a right-angle sample without a cutting mouth, and the measuring speed is 500mm/min;
melt flow rate, test standard is ISO 1133-1, method A,190 ℃,5kg;
the static friction coefficient, the test standard is ISO 8295, the test speed is 500mm/min, and the mass of the sliding block is 500g;
the dynamic friction coefficient, the test standard is ISO 8295, the test speed is 500mm/min, and the mass of the sliding block is 500g;
reciprocating friction, the test standard is GB/T3920, the vertical pressure of the friction head is 10kN, 100mm is formed, and the reciprocating speed is 60mm/min;
the abrasion performance is tested according to DIN EN ISO 105-X12:2016, the diameter of a friction head is 16mm, the load is 1kg, the stroke is 80mm, and 5000 times of wet friction are carried out after 5000 times of dry friction;
scratch resistance performance a cross scratch test was performed according to the method specified in GB/T9286, and delta E was measured before and after the test using a color difference meter.
Weather resistance, tested according to SAE J2527;
table 1 measurement results
As can be seen from the table above, the materials prepared in examples 1-3 of the present invention have lower static and dynamic friction coefficients and static and dynamic friction coefficients after friction, and the abrasion performance of the examples is generally better than that of the comparative examples.
The thermoplastic elastomer in example 1 has higher styrene content, higher addition amount of the crosslinking agent and the auxiliary crosslinking agent and higher overall strength, and the optimized crosslinking agent component forms good in-situ crosslinking, improves compatibility and overall mechanical property performance, and has excellent cladding property on glass and metal; compared with the example 1, in the example 2, polyolefin is used as a continuous phase, polyurethane elastomer is not contained, hydrosilylation in the formula design brings better compatibility and scratch resistance, and meanwhile, the weather resistance is excellent, and the cladding property on glass is good; compared with example 2, the continuous polyurethane phase is contained in example 3, and the crosslinking degree is slightly high, so that the mechanical property and the scratch resistance are excellent, meanwhile, a certain weather resistance is ensured, and glass, PC, ABS, PC/ABS, ASA and the like can be well coated.
Compared with the example 1, the comparative example 1 uses the same production process, and the same processing process is adopted according to the conventional thermoplastic elastomer in the formula design, so that the obtained product has poor compatibility and mechanical property, can cover glass, but has poor weather resistance;
compared with the example 1, the same material formula is used in the comparative example 2, but the processing process is that according to the traditional method, the TPV finished product is firstly produced according to dynamic vulcanization to serve as a self-made raw material, then the silicone rubber thermoplastic elastomer is produced according to the banburying method, and then the silicone rubber thermoplastic elastomer is produced according to the process of the thermoplastic elastomer, the production process is more complicated, and the dispersion of the EPDM, the silicone rubber and the thermoplastic elastomer in the base material is poorer, the mechanical property is lower, and the scratch resistance, the self-lubricating property and the wear resistance are also poorer.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. A self-lubricating high strength thermoplastic elastomer characterized in that: the adhesive is prepared from the following components in parts by weight:
ethylene propylene diene monomer 100 parts
100-150 parts of silicon rubber
80-200 parts of polyolefin resin
200-300 parts of thermoplastic elastomer
80-150 parts of plasticizer
0-120 parts of filler
5-20 parts of compatilizer
2-20 parts of cross-linking agent
2-20 parts of auxiliary cross-linking agent
1-20 parts of lubricant
Antioxidant 1-20 parts
1-20 parts of light stabilizer.
2. The self-lubricating high strength thermoplastic elastomer of claim 1, wherein: the third monomer in the ethylene propylene diene monomer is one of ethylidene norbornene, dicyclopentadiene and 1, 4-hexadiene, wherein the mass content of the third monomer is 3-12%;
the Mooney viscosity value of the ethylene propylene diene monomer is 25-110.
3. The self-lubricating high strength thermoplastic elastomer of claim 1, wherein: the silicone rubber is at least one of methyl silicone rubber, methyl vinyl phenyl silicone rubber, phenyl silicone rubber and fluoro silicone rubber;
the polyolefin resin is one or more of polypropylene, polyethylene and ethylene octene copolymer.
4. The self-lubricating high strength thermoplastic elastomer of claim 1, wherein: the thermoplastic elastomer is one or more of a styrene-butadiene-styrene block copolymer, a styrene-ethylene-butylene-styrene block copolymer, a polyester polyurethane elastomer, a polyether polyurethane elastomer and an aliphatic polyurethane elastomer;
the plasticizer has a flash point of more than 200 ℃ and a kinematic viscosity of more than 100mm at 40 DEG C 2 One or more blends of paraffinic, naphthenic, aromatic, linear paraffinic oils.
5. The self-lubricating high strength thermoplastic elastomer of claim 1, wherein: the filler is at least one of calcium carbonate, talcum powder, kaolin, mica, wollastonite, barium sulfate, carbon black, white carbon black and titanium dioxide, and the mesh number of the filler is not more than 6000 meshes.
6. The self-lubricating high strength thermoplastic elastomer of claim 1, wherein: the compatilizer is one or more of TPU-g-MAH, PP-g-MAH, SEBS-g-MAH, PP-g-St, PP-g-GMA and silicone rubber-ethylene vinyl acetate copolymer.
7. The self-lubricating high strength thermoplastic elastomer of claim 1, wherein: the lubricant is one or more of polysiloxane, silicone master batch, erucamide, zinc stearate, magnesium stearate and hydrogen-containing silicone oil.
8. The self-lubricating high strength thermoplastic elastomer of claim 1, wherein: the cross-linking agent is one or more of isopropyl tert-butyl peroxycarbonate, phenolic resin, modified methyl triacetoxy silane, octamethyl cyclotetrasiloxane and epoxy oligosiloxane;
the auxiliary cross-linking agent is one or more of bismaleimide, trialkenyl methyl triisocyanurate, triallyl isocyanurate, N' -m-phenylene bismaleimide, diphenyl silol and triallyl cyanurate.
9. A method of preparing a self-lubricating high strength thermoplastic elastomer as claimed in any one of claims 1 to 8, wherein: the preparation method comprises the following preparation steps:
(1) Sequentially adding 20-30wt% of ethylene propylene diene monomer rubber, silicone rubber, thermoplastic elastomer and plasticizer into a high-speed stirrer, stirring at a speed of 100-500r/min for 10-30 min, and standing for 0.5-2 hours; adding polyolefin resin, filler, compatilizer, lubricant, antioxidant and light stabilizer, and stirring at the speed of 100-500r/min for 5-10 min to obtain a mixture;
(2) Continuously and quantitatively adding the mixture in the step (1) to the first section of the solid conveying area of the extruder by using a metering pump, continuously and quantitatively adding 30-40wt% of plasticizer in the front section of the extruder by using the metering pump, vacuumizing in the tail section of the extruder by using a vacuum pump, and melting, extruding and granulating by using the extruder to obtain an intermediate;
(3) And (3) continuously adding the intermediate prepared in the step (2), the cross-linking agent, the auxiliary cross-linking agent and the rest plasticizer into the first section of the solid conveying area of the extruder by using a metering pump, vacuumizing at the tail end of the extruder by using a vacuum pump, and obtaining the self-lubricating high-strength thermoplastic elastomer through melting, extrusion and granulation of the extruder.
10. The method of manufacturing according to claim 9, wherein: the extruders in the steps (2) and (3) are all homodromous double-screw extruders, the feeding rotating speed is 60-300r/min, the screw rotating speed is 200-500r/min, and the length-diameter ratio of the screw is 52-64;
the temperature of the first section of the solid conveying area of the extruder is not more than 120 ℃, and the temperature of the other sections is 150-220 ℃.
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