CN109337375A - Low compression set silicone rubber material and preparation method thereof - Google Patents
Low compression set silicone rubber material and preparation method thereof Download PDFInfo
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- CN109337375A CN109337375A CN201811244157.3A CN201811244157A CN109337375A CN 109337375 A CN109337375 A CN 109337375A CN 201811244157 A CN201811244157 A CN 201811244157A CN 109337375 A CN109337375 A CN 109337375A
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- Prior art keywords
- compression set
- silicone rubber
- weight
- parts
- low compression
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 78
- 230000006835 compression Effects 0.000 title claims abstract description 73
- 238000007906 compression Methods 0.000 title claims abstract description 73
- 239000000463 material Substances 0.000 title claims abstract description 50
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- -1 fatty acid ester Chemical class 0.000 claims abstract description 68
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 35
- 150000001875 compounds Chemical class 0.000 claims abstract description 34
- 239000000945 filler Substances 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 23
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 11
- 239000000194 fatty acid Substances 0.000 claims abstract description 11
- 229930195729 fatty acid Natural products 0.000 claims abstract description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 36
- 229920000260 silastic Polymers 0.000 claims description 36
- 239000000126 substance Substances 0.000 claims description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 20
- 229910052697 platinum Inorganic materials 0.000 claims description 18
- 239000001257 hydrogen Substances 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 16
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 13
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 11
- 239000003112 inhibitor Substances 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- 150000004665 fatty acids Chemical class 0.000 claims description 7
- 150000002191 fatty alcohols Chemical class 0.000 claims description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- QYLFHLNFIHBCPR-UHFFFAOYSA-N 1-ethynylcyclohexan-1-ol Chemical compound C#CC1(O)CCCCC1 QYLFHLNFIHBCPR-UHFFFAOYSA-N 0.000 claims description 4
- 239000007859 condensation product Substances 0.000 claims description 4
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 239000011256 inorganic filler Substances 0.000 claims description 4
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 4
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 4
- 150000004692 metal hydroxides Chemical class 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 229920005573 silicon-containing polymer Polymers 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- QXLPXWSKPNOQLE-UHFFFAOYSA-N methylpentynol Chemical compound CCC(C)(O)C#C QXLPXWSKPNOQLE-UHFFFAOYSA-N 0.000 claims description 3
- 229960002238 methylpentynol Drugs 0.000 claims description 3
- 150000002978 peroxides Chemical group 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 abstract description 4
- 239000000806 elastomer Substances 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000047 product Substances 0.000 description 8
- 235000021355 Stearic acid Nutrition 0.000 description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 7
- 239000008117 stearic acid Substances 0.000 description 7
- 125000000217 alkyl group Chemical group 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- YEECOJZAMZEUBB-UHFFFAOYSA-N 2,2,3,3,6,6,7,7-octamethyloctane Chemical compound CC(C)(C)C(C)(C)CCC(C)(C)C(C)(C)C YEECOJZAMZEUBB-UHFFFAOYSA-N 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 5
- 239000004926 polymethyl methacrylate Substances 0.000 description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 3
- 229910018540 Si C Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- HPEUJPJOZXNMSJ-UHFFFAOYSA-N Methyl stearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC HPEUJPJOZXNMSJ-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 125000004093 cyano group Chemical group *C#N 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- WVDDGKGOMKODPV-UHFFFAOYSA-N hydroxymethyl benzene Natural products OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N methyl pentane Natural products CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 125000000725 trifluoropropyl group Chemical group [H]C([H])(*)C([H])([H])C(F)(F)F 0.000 description 2
- DCXXMTOCNZCJGO-UHFFFAOYSA-N tristearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical class C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- YILVCWVSUULTOJ-UHFFFAOYSA-N 2-methylpropyl octadecanoate;octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O.CCCCCCCCCCCCCCCCCC(=O)OCC(C)C YILVCWVSUULTOJ-UHFFFAOYSA-N 0.000 description 1
- WDQOEAOLRIMQDA-UHFFFAOYSA-N 3-methylbutyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCC(C)C WDQOEAOLRIMQDA-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- ULBTUVJTXULMLP-UHFFFAOYSA-N butyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCCC ULBTUVJTXULMLP-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- CAMHHLOGFDZBBG-UHFFFAOYSA-N epoxidized methyl oleate Natural products CCCCCCCCC1OC1CCCCCCCC(=O)OC CAMHHLOGFDZBBG-UHFFFAOYSA-N 0.000 description 1
- RCNRJBWHLARWRP-UHFFFAOYSA-N ethenyl-[ethenyl(dimethyl)silyl]oxy-dimethylsilane;platinum Chemical class [Pt].C=C[Si](C)(C)O[Si](C)(C)C=C RCNRJBWHLARWRP-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910001677 galaxite Inorganic materials 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N glycolonitrile Natural products N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- SMWDEDPRQFUXNH-UHFFFAOYSA-N hexyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCCCCC SMWDEDPRQFUXNH-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N n-hexyl alcohol Natural products CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 1
- GLDOVTGHNKAZLK-UHFFFAOYSA-N n-octadecyl alcohol Natural products CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 1
- 125000005447 octyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert-Butyl hydroperoxide Substances CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000004417 unsaturated alkyl group Chemical group 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 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
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Landscapes
- 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
本申请提供了一种低压缩永久变形硅橡胶材料及其制备方法，硅橡胶材料包括以下组分：有机聚硅氧烷、填料、交联剂、脂肪酸酯和结构控制剂；相对于100重量份的有机聚硅氧烷，填料为10～100重量份，交联剂为0.1～5重量份，脂肪酸酯为0.01～10重量份，结构控制剂为1～20重量份。制备方法包括：称取所需的有机聚硅氧烷、填料、脂肪酸酯、结构化控制剂进行混合，得到硅橡胶复合物；将硅橡胶复合物进行密炼，得到硅橡胶胶料N1。将硅橡胶胶料N1置于室温环境下静置；将静置后的硅橡胶胶料N1与交联剂进行混合，得到硅橡胶胶料N2；将硅橡胶胶料N2固化成型，得到硅橡胶弹性体。本申请制得的硅橡胶材料具有优异的低压缩永久变形性能；本申请兼具良好的脱模性。
The present application provides a low compression set silicone rubber material and a preparation method thereof. The silicone rubber material includes the following components: organopolysiloxane, filler, crosslinking agent, fatty acid ester and structure control agent; relative to 100 weight 10-100 parts by weight of filler, 0.1-5 parts by weight of crosslinking agent, 0.01-10 parts by weight of fatty acid ester, and 1-20 parts by weight of structure control agent. The preparation method includes: weighing and mixing required organopolysiloxane, filler, fatty acid ester and structure control agent to obtain a silicone rubber compound; banburying the silicone rubber compound to obtain a silicone rubber compound N1. The silicone rubber compound N1 is placed in a room temperature environment and allowed to stand; the standing silicone rubber compound N1 is mixed with a cross-linking agent to obtain a silicone rubber compound N2; the silicone rubber compound N2 is cured and molded to obtain a silicone rubber Elastomer. The silicone rubber material prepared in the present application has excellent low compression set properties; the present application has both good mold release properties.
Description
Technical field
The present invention relates to silicon rubber technical fields, more particularly to a kind of low compression set silastic material and its system
Preparation Method.
Background technique
Silicon rubber because it is with excellent weatherability, heat-proof aging etc. comprehensive performance, aerospace, precision equipment,
The fields such as communications and transportation have very extensive application.Silicon rubber by molding or squeeze out be prepared into various sealing rings, gasket,
Sealing strip etc. product application in above-mentioned field, requirement of such sealing material for silicon rubber be then must have it is excellent low
Compression set performance, compression set performance is lower, then the sealing performance for representing silastic product is more lasting.
The silicon rubber obtained at present using the method for reducing sizing material compression set compression still with higher is permanent
It deforms (175 DEG C × 22h, 25% compression ratio), leakproofness is still bad, however it remains very big room for improvement.
Summary of the invention
The present invention provides a kind of low compression set silastic materials and preparation method thereof, to solve silicon rubber still
The problem of compression set with higher.
To achieve the above object, in a first aspect, the present invention provides a kind of low compression set silastic materials, including
Following components: organopolysiloxane, filler, crosslinking agent, aliphatic ester and constitution controller；
The aliphatic ester is used to improve the compression set performance of silicon rubber；Have relative to described in 100 parts by weight
Machine polysiloxanes, the filler are 10~100 parts by weight, and the crosslinking agent is 0.1~5 parts by weight, and the aliphatic ester is
0.01~10 parts by weight, the constitution controller are 1~20 parts by weight.
Optionally, above-mentioned low compression set silastic material, the chemical general formula of the organopolysiloxane are as follows:
Wherein, R, R1、R2For organic hydrocarbyl group, n, m be 1~
Arbitrary value in 10000 ranges, n+m are arbitrary value in 1000~10000 ranges.
Optionally, above-mentioned low compression set silastic material, the filler are reinforced type silica；Or/and
The filler is the siliceous class inorganic filler of non-reinforced type, metal oxide, metal hydroxides, one in inorganic salts
Kind pure substance or at least two mixtures.
Optionally, above-mentioned low compression set silastic material, the crosslinking agent are that peroxide or platinum are catalyzed
Agent.
Optionally, above-mentioned low compression set silastic material, the platinum catalyst include platinum complex, contain
Hydrogen polysiloxanes, inhibitor and base-material；
The platinum complex is 0.001~5 parts by weight, and hydrogen containing siloxane is 10~50 parts by weight, and inhibitor is
0.001~10 parts by weight；
The base-material is the material for supporting platinum-based catalyst, specifically comprises 5%~10% specific surface area > 50
The precipitated silica of ㎡/g, 30~50% molecule be averaged chain number be 7000~8000 dimethyl silicone polymer.
Optionally, above-mentioned low compression set silastic material, the chemical general formula of the hydrogen containing siloxane are as follows:
Wherein, R ' is methyl or hydrogen, and a is 0~50 integer, and wherein a is preferably 0~10；B is 5~100 integers, wherein b
It is preferred that 5~50, a+b are 5~100 integers, the hydrogen-containing siloxane is the single pure substance or at least two for meeting chemical general formula
The mixture of kind pure substance composition；
The inhibitor includes: 3- methyl-1-butine-3- alcohol, methylpentynol, 3- methyl-1-hexin-3-
Alcohol, 1- acetenyl -1- cyclohexanol.
Optionally, above-mentioned low compression set silastic material, the organopolysiloxane are pure substance or mix
Close object.
Optionally, above-mentioned low compression set silastic material, the unitary fat that the aliphatic ester is C6~C30
The condensation product of acid and the unitary fatty alcohol of C6~C30.
Optionally, above-mentioned low compression set silastic material, the constitution controller be strand joint number 2~
100 organopolysiloxane, the chemical general formula of the structuring control just are as follows:
Wherein, R " includes hydroxyl, methoxyl group, ethyoxyl, dimethylamino, diethylamino；R " ' include methyl, phenyl,
Hydroxyl, vinyl；C is the arbitrary integer between 0~100；D is the arbitrary integer between 0~20；The antistructurizing agent is full
The mixture of the single pure substance of sufficient chemical general formula or at least two pure substances composition.
Second aspect, this application provides a kind of preparation methods of low compression set silastic material, comprising:
It weighs required organopolysiloxane, filler, aliphatic ester and antistructurizing agent to be mixed, obtains silicon rubber
Compound；
The silicone rubber compound that mixing is completed carries out mixing, obtains silicone rubber compounds N1.
The silicone rubber compounds N1 is placed under room temperature environment and is stood；
The silicone rubber compounds N1 after standing is mixed with crosslinking agent, obtains silicone rubber compounds N2；
By silicone rubber compounds N2 curing molding, silicone elastomer is obtained.
Scheme bring beneficial effect provided in an embodiment of the present invention includes at least:
The present invention provides low compression set silastic materials and preparation method thereof, are added in organopolysiloxane
Filler, crosslinking agent, aliphatic ester and constitution controller；Aliphatic ester will not generate degradation to organopolysiloxane, improve silicon
The compression set performance of rubber, while aliphatic ester can play the role of inner pattern releasing agent applicable, improve the release property of silicon rubber,
Make silastic material obtained that there is excellent low compression set deformation performance, release property and cheap cost.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the preparation method of low compression set silastic material.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Multiple embodiments of the invention will be disclosed with schema below, as clearly stated, the details in many practices
It will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the present invention.Also
It is to say, in some embodiments of the invention, the details in these practices is non-essential.In addition, for the sake of simplifying schema,
Some known usual structures and component will be painted it in the drawings in simply illustrative mode.
The present invention provides a kind of low compression set silastic materials, including following components: organopolysiloxane is filled out
Material, crosslinking agent, aliphatic ester and constitution controller；Relative to the organopolysiloxane of 100 parts by weight, filler is 10~100 weights
Part is measured, crosslinking agent is 0.1~5 parts by weight, and aliphatic ester is 0.01~10 parts by weight, and constitution controller is 1~20 parts by weight.This
Filler, crosslinking agent, aliphatic ester and constitution controller is added in application in organopolysiloxane；Aliphatic ester will not be to organic poly-
Siloxanes generates degradation, improves the compression set performance of silicon rubber, while aliphatic ester can play the work of inner pattern releasing agent applicable
With improving the release property of silicon rubber, make silastic material obtained that there is excellent low compression set deformation performance, de-
Mould and cheap cost.
Aliphatic ester in the application be at normal temperature colourless oil liquid or freezing point at 100 DEG C the following are whites
Solid, the heated substance for being converted into colourless liquid, in-lubricant, textile industry when being typically used as resin processing are used as
Fabric lubricant lubricates feel for increasing as waterproofing agent, lube oil additive, base material of cosmetics using its hydrophobic effect,
As can be seen from the above description aliphatic ester in the prior art played the role of being lubricating action.
Aliphatic ester is applied to silicon rubber for the first time by the application, has the effect that the effect of (1) inner pattern releasing agent applicable, principle
It is aliphatic ester and organopolysiloxane objectionable intermingling, during sulfidization molding, aliphatic ester can be out of silicone rubber compound
Portion moves to surface, and one layer of separation layer is formed between silastic product and mold, blocks silastic product surface and mold table
Face forms hydrogen bond, to have the function that improve demoulding；(2) improve the effect of silicon rubber compression set performance, principle
It is organopolysiloxane in silicon rubber in the acid or common inner pattern releasing agent applicable stearic acid of alkaline matter such as silicon rubber or hard
Under resin acid salt existence condition, the fracture that can gradually occur inside strand between strand is reset, and accelerates organopolysiloxane
Degradation so as to gradually lose physical mechanical property such as tensile strength, compression in use permanent for silastic product
Deformation performance etc. shortens silastic product service life；Especially for the compression set performance to silicon rubber such as sealing
It is required that higher application field, the inner pattern releasing agent applicables such as zinc stearate, stearic acid are more unavailable at this time, and the molecular structure of aliphatic ester
In be not present the higher ionic bond of reactivity, as improve silicon rubber compression set additive be used for silicon rubber when not
Metal ion or hydrogen ion etc. can be dissociateed, not will cause organopolysiloxane degradation, therefore the compression of silicon rubber can be improved
Be permanently deformed performance.
The chemical general formula of the organopolysiloxane of the application are as follows:
Wherein, R, R1、R2For organic hydrocarbyl group and by cyano or
Fluorine-substituted organic hydrocarbyl group；N, m is arbitrary value in 1~10000 range, and wherein n is preferably 1000~9000 arbitrary integers,
M is preferably 0~5000 arbitrary integer；N+m is arbitrary value in 1000~10000 ranges.
The alkyl that organic hydrocarbyl group replaces frequently with alkyl, unsaturated alkyl, hetero atom, aryl group.Wherein, R is
The alkyl being connected by Si-C key with siloxane main chain, such as methyl, ethyl, n-propyl, isopropyl, preferably methyl；R1For
The alkyl or alkylene being connected by Si-C key with siloxane main chain, such as methyl, ethyl, n-propyl, isopropyl, ethylene
Base, allyl, preferred vinyl；R2For the alkyl or alkylene or aryl that are connected by Si-C key with siloxane main chain or
The alkyl replaced by cyano, halogen, for example, methyl, ethyl, n-propyl, isopropyl, vinyl, allyl, phenyl, naphthalene,
Anthryl, cyanogen propyl, trifluoro propyl, hexafluoro isopropyl, preferably methyl, ethyl, phenyl or trifluoro propyl.
The organopolysiloxane of the application is pure substance or mixture；Further, organopolysiloxane is on meeting
State the pure substance or mixture of organopolysiloxane chemical general formula.
The filler of the application is reinforced type silica；Or/and filler is the siliceous class inorganic filler of non-reinforced type, metal oxygen
One of compound, metal hydroxides, inorganic salts pure substance or at least two mixtures.
The filler of the application is frequently with silica.(1) filler, which can be, plays reinforcing effect, specific surface area (BET method)
At least 50m2The silica of/g, such as precipitated silica, fume colloidal silica.The filler can be by organosilan
Or siloxane treated has the white carbon black of hydrophobic property later.A kind of filler can be used in filler, can also use at least two
The mixture of kind filler.
(2) filler also can be not more than 50m with right and wrong reinforced type, specific surface area2The filler of/g, such as siliceous class inorganic filler silicon
Micro mist, diatomite, calcium silicates, zirconium silicate, talcum powder etc. or metal oxide such as calcium oxide, titanium oxide, iron oxide, oxygen
Change magnesium, zinc oxide or metal hydroxides such as magnesium hydroxide, aluminium hydroxide etc.；Other type inorganic salts, as calcium carbonate,
Magnesium carbonate etc..
The crosslinking agent of the application is frequently with peroxide or platinum catalyst.(1) crosslinking agent can be to form free radical
Organic peroxide, such as 2,5- dimethyl -2,5- di-t-butyl hexane peroxide, di-t-butyl peroxide, dicumyl peroxide,
2,4- dichlorobenzoperoxides, benzoyl peroxide, benzoyl peroxide etc., preferably 2,5- dimethyl -2,5- bis-
Tert-butyl hydroperoxide hexane and 2,4- dichlorobenzoperoxide.
(2) crosslinking agent can be the platinum vulcanizing agent of catalyzing addition reaction of silicon with hydrogen, platinum vulcanizing agent include platinum complex,
Four kinds of components of hydrogen containing siloxane and inhibitor and base-material；The platinum complex is 0.001~5 parts by weight, hydrogeneous poly- silicon oxygen
Alkane is 10~50 parts by weight, and inhibitor is 0.001~10 parts by weight；
The base-material is the material for supporting platinum-based catalyst, specifically comprises 5%~10% specific surface area > 50
The precipitated silica of ㎡/g, 30~50% molecule be averaged chain number be 7000~8000 dimethyl silicone polymer.
Wherein, platinum complex is the complex that pt atom and other organic groups are formed, such as: HPtCl2(octyloxy
)4, platinum -1,3- divinyl -1,1,3,3- tetramethyl disiloxanes etc., wherein platinum complex be 0.001~5 parts by weight, it is excellent
Select 0.001~0.1 parts by weight；
Wherein, the chemical general formula of hydrogen containing siloxane is as follows:
Wherein, R ' is methyl or hydrogen, and a is 0~50 integer, and wherein a is preferably 0~10；B is 5~100 integers, wherein b
It is preferred that 5~50, a+b are 5~100 integers；Wherein hydrogen containing siloxane is 10~50 parts by weight, preferably 10~30 parts by weight；
Inhibitor include: 3- methyl-1-butine-3- alcohol, methylpentynol, 3- methyl-1-hexin-3- alcohol,
1- acetenyl -1- cyclohexanol etc., preferably 1- acetenyl -1- cyclohexanol, wherein inhibitor preferably 0.001~10 parts by weight, especially
It is preferred that 0.01~1 parts by weight.
Condensation of the aliphatic ester of the application frequently with the unary fatty acid of C6~C30 and the unitary fatty alcohol of C6~C30
Product.Wherein the carbon number of fatty acid and fatty alcohol may be the same or different, and the aliphatic ester can be by corresponding any fat
The isomers of acid and fatty alcohol is condensed.Such as: dodecyl acid hexanol ester, octyl hexanol ester, methyl stearate, stearic acid
Butyl ester, stearic acid isobutyl stearate, isoamyl stearate, hexyl stearate, stearic acid decylene glycol ester, geoceric acid stearyl alcohol
Ester；Any one or more hydrogen atoms can also be replaced phenyl, such as dodecanol benzoate, tristearin in the aliphatic ester
Sour benzyl alcohol ester, phenylacetic acid tristearin alcohol ester；The aliphatic ester is the pure substance or mixture of above-mentioned substance；The fatty acid
The preferably total carbon number of ester is between C15~C30, between particularly preferred C20~30；Using the polysiloxane of 100 parts by weight as base
Standard calculates, preferably 0.01~1 part of aliphatic ester dosage, 0.01~0.5 part particularly preferred.
The constitution controller of the application is organopolysiloxane of the strand joint number 2~100.The change of structuring control just
Learn general formula are as follows:
Wherein, R " includes hydroxyl, methoxyl group, ethyoxyl, dimethylamino, diethylamino, preferably hydroxyl or methoxyl group.
R " ' includes methyl, phenyl, hydroxyl, vinyl, preferably methyl.C is the arbitrary integer between 0~100, preferably 5~20, d 0
Between~20 appoint, meaning integer, preferably 0~10.Antistructurizing agent is pure substance or mixture；Further, structuring
Controlling agent is the pure substance or mixture for meeting above structure controlling agent chemical general formula.
It is to be noted that in addition to the above components, conventional substances used in other silicon rubber can also be mixed into above-mentioned
Silicone rubber compound in, such as vulcanization accelerator, colorant, heat-resistant agent, fire retardant, conductive agent, resistance to oil additive.
As shown in Figure 1, this application provides a kind of preparation methods of low compression set silastic material, comprising:
S01 weighs required organopolysiloxane, filler, aliphatic ester, antistructurizing agent and is mixed, obtains silicon
Rubber composite；The application mixes material frequently with kneader；
S02, the silicone rubber compound that mixing is completed carry out mixing reaction, obtain silicone rubber compounds N1；The application is usual
Silicone rubber compound is placed in mixer and carries out mixing, smelting temperature is standing to be set to 140 DEG C~200 DEG C, preferably 160 DEG C~
180 DEG C, 1~5h of mixing time, preferably 2~3h；
Silicone rubber compounds N1 is placed under room temperature environment and stands by S03；The application often stands 8~48h, preferably for 24 hours；
Silicone rubber compounds N1 after standing is added crosslinking agent and mixed, obtains silicone rubber compounds N2 by S04；The application
Usually silicone rubber compounds N1 is placed in open mill, preferably two-roll mill, then open mill is added in crosslinking agent, it is thin by logical 5~50
It is secondary, preferably 30 times, obtain silicone rubber compounds N2；
Silicone rubber compounds N2 curing molding is obtained silicone elastomer by S05；The application is usually by silicone rubber compounds N2
It is placed in mold at 100~250 DEG C and is solidified, preferably 120~200 DEG C of solidification temperature, curing time preferred 1min~
60min, particularly preferred 5min to 30min, obtains silicone elastomer.
Invention is specifically described combined with specific embodiments below:
Embodiment 1:(1. organopolysiloxane: Polymethyl methacrylate, 2. filler: silica, 3. crosslinking agent:
2,5- dimethyl -2,5- di-t-butyl hexane peroxide；4. aliphatic ester: butyl stearate, 5. antistructurizing agent: α-ω-
Dialkyl polydimethylsiloxane)
Weigh 100 parts by weight 110-1 ethylene methacrylic dimethyl silicone polymer raw rubbers, 50 parts by weight precipitated silicas, 2
α-alpha, omega-dihydroxy polydimethyl siloxane that parts by weight mean molecule chain number is 6,0.2 parts by weight butyl stearate are placed in 10
It rises in vacuum mixer and is mixed, after mixing completion mixing 2 hours at 160 DEG C, stand 24 hours after mixing, then
Be added 0.6 parts by weight 2 in two-roll mill, 5- dimethyl -2,5- di-t-butyl hexane peroxide, it is thin it is 30 times logical after, be placed in mould
Solidify 10 minutes at 180 DEG C in tool, obtains compression set test specimens block A.
Comparative example 1:(1. organopolysiloxane: Polymethyl methacrylate, 2. filler: silica, 3. crosslinking agent:
2,5- dimethyl -2,5- di-t-butyl hexane peroxide；4. zinc stearate, 5. antistructurizing agent: the poly- diformazan of α-alpha, omega-dihydroxy
Radical siloxane)
0.2 parts by weight butyl stearate in embodiment 1 is changed to zinc stearate, other compositions and reaction condition and reality
It is completely the same to apply example 1, obtains compression set test specimens block B.
Compression set test method and condition are referring to GB/T 7759.1-2015.By compression set test specimens block
It is 30mm ± 0.1mm, the sample block of thickness 12.5mm ± 0.1mm that A and B, which is arranged to diameter,.Respectively with the thickness of thickness gauge measurement A and B
It spends (being denoted as h)；It is subsequently placed in the fixture of standard requirements, screws fastening screw and do not loosened to limiter, limiter height 9.3mm
Then the fixture for accompanying test specimens block A or B is placed in air dry oven by ± 0.1mm, bake 22 hours under 175 DEG C of constant temperature；
Test specimens block A or B is taken out after the completion of baking, and test specimens block A or B are placed in and measure thickness with thickness gauge again after 30 minutes at room temperature
It spends (being denoted as h`).Compression set calculation formula is as follows:
Buckling=100 (h-h`)/(h-9.3).
Compression set measured by test specimens block A and B and other physical mechanical properties test result is as follows table 1:
Table 1
| Detection project | Embodiment 1 | Comparative example 1 |
| Hardness (Shore A) | 45 | 46 |
| Tensile strength (MPa) | 8.4 | 8.5 |
| Elongation (%) | 460 | 445 |
| Tearing strength (N/mm) | 13.5 | 13.2 |
| Resilience (%) | 72 | 74 |
| Compression set performance | 11 | 30 |
| Release property | Well | Well |
| Change colour (200 DEG C of processing 4h) | It is non-discolouring | Turn yellow |
According to the principle that compression set performance value is smaller, silicon rubber is less susceptible to deformation, by table 1 it is found that real
The compression set performance value for applying example 1 is less than comparative example 1, therefore the compression set performance of embodiment 1 is better than comparison
Example 1, therefore show that aliphatic ester is applied in silastic material preparation process, have and promotes silicon rubber compression set performance
Effect；And in the case where promoting compression set performance, the color of embodiment 1 will not change colour, and comparative example 1 turns yellow, therefore
The ageing-resistant ability of embodiment 1 is better than comparative example 1.
Embodiment 2:(1. organopolysiloxane: Polymethyl methacrylate, 2. filler: silica, 3. crosslinking agent:
2,5- dimethyl -2,5- di-t-butyl hexane peroxide；4. aliphatic ester: stearic acid phenylglycollic ester, 5. antistructurizing agent: α-
Alpha, omega-dihydroxy polydimethyl siloxane)
Weigh 100 parts by weight 110-1 Polymethyl methacrylate raw rubbers, 50 parts by weight precipitated silicas, 2 weight
α-alpha, omega-dihydroxy polydimethyl siloxane that part strand joint number is 6,0.1 parts by weight stearic acid phenylglycollic ester are placed in 10 liters very
It is mixed in empty mixer, after mixing completion mixing 2 hours at 160 DEG C, stands 24 hours after mixing, then double roller
Be added 0.6 parts by weight 2 on open mill, 5- dimethyl -2,5- di-t-butyl hexane peroxide, it is thin it is 30 times logical after, be placed in mold
Solidify 10 minutes at 180 DEG C.Obtain compression set test specimens block C.
Comparative example 2:(1. organopolysiloxane: Polymethyl methacrylate, 2. filler: silica, 3. crosslinking agent:
2,5- dimethyl -2,5- di-t-butyl hexane peroxide；4. stearic acid, 5. antistructurizing agent: α-alpha, omega-dihydroxy polydimethyl
Siloxanes)
0.1 parts by weight stearic acid phenylglycollic ester is changed to stearic acid, other conditions are completely the same.It obtains compressing permanent change
Shape test specimens block D.
Compression set test is with embodiment 1 and comparative example 1, test result is as follows table 2:
Table 2
According to the principle that compression set performance value is smaller, silicon rubber is less susceptible to deformation, by table 2 it is found that real
The compression set performance value for applying example 2 is less than comparative example 2, therefore the compression set performance of embodiment 2 is better than comparison
Example 2, therefore show that aliphatic ester is applied in silastic material preparation process, have and promotes silicon rubber compression set performance
Effect；And in the case where promoting compression set performance, the color of embodiment 1 will not change colour, and comparative example 1 turns yellow, therefore
The ageing-resistant ability of embodiment 1 is better than comparative example 1.
Currently in order to improving the compression set performance of silicon rubber, iron-galaxite is dosed into silicon rubber, although its
Compression set performance is significantly enhanced really, but its disadvantage is first is that cost of material is higher, it is often more important that ferrimanganic
Spinelle is brownish red crystal hard powder, larger to equipment attrition in process, while will affect silicone rubber products appearance,
It is unfavorable for terminal applies to mix colours, especially the influence silicon rubber transparency, is unfavorable for preparing transparent article, strongly limits silicon
Rubber applications range.
Currently in order to improving the compression set performance of silicon rubber, higher aliphatic is added into silicon rubber to be helped
In promoting silicon rubber compression set, although good compared to fatty acid and fatty acid salt, fatty alcohol is preparatory using preceding needing
It is handled, is otherwise difficult to mix and is uniformly dispersed, increase process operation difficulty.
Therefore in comparison with the present application by foregoing description, the aliphatic ester of the application, which has, preferably promotes silicon rubber compression
The ability for the performance that is permanently deformed.The unitary fat of the unary fatty acid and C6~C30 frequently with C6~C30 is used due to the application
The condensation product of alcohol, for polyhydric aliphatic acid polyol ester, polyhydric aliphatic acid polyol ester unavoidably remains not
The hydroxyl and carboxyl of fully reacting will lead to polysiloxane and slowly degradation occur, for silicon rubber compression set
It can be promoted limited；Therefore, the condensation product of the unitary fatty alcohol of the unary fatty acid and C6~C30 of C6~C30 has better
Promote the ability of silicon rubber compression set performance.
Above-described specific example of the invention, to the purpose of the present invention, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this hair
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (10)
1. a kind of low compression set silastic material, which is characterized in that including following components: organopolysiloxane, filler,
Crosslinking agent, aliphatic ester and constitution controller；
The aliphatic ester is used to improve the compression set performance of silicon rubber；Relative to the described organic poly- of 100 parts by weight
Siloxanes, the filler be 10~100 parts by weight, the crosslinking agent be 0.1~5 parts by weight, the aliphatic ester be 0.01~
10 parts by weight, the constitution controller are 1~20 parts by weight.
2. low compression set silastic material according to claim 1, which is characterized in that the organopolysiloxane
Chemical general formula are as follows:
Wherein, R, R1、R2For organic hydrocarbyl group, n, m are 1~10000 model
Interior arbitrary value is enclosed, n+m is arbitrary value in 1000~10000 ranges.
3. described in any item low compression set silastic materials according to claim 1~2, which is characterized in that described to fill out
Material is reinforced type silica；Or/and
The filler is that one of the siliceous class inorganic filler of non-reinforced type, metal oxide, metal hydroxides, inorganic salts are pure
Net object or at least two mixtures.
4. described in any item low compression set silastic materials according to claim 1~2, which is characterized in that the friendship
Joining agent is peroxide or platinum catalyst.
5. low compression set silastic material according to claim 4, which is characterized in that the platinum catalyst packet
Include platinum complex, hydrogen containing siloxane, inhibitor and base-material；
The platinum complex be 0.001~5 parts by weight, hydrogen containing siloxane be 10~50 parts by weight, inhibitor be 0.001~
10 parts by weight；
The base-material is the material for supporting platinum-based catalyst, specifically comprises 5%~10% 50 ㎡ of specific surface area >/g
Precipitated silica, 30~50% molecule be averaged chain number be 7000~8000 dimethyl silicone polymer.
6. low compression set silastic material according to claim 5, which is characterized in that the hydrogen containing siloxane
Chemical general formula it is as follows:
Wherein, R ' is methyl or hydrogen, and a is 0~50 integer, and wherein a is preferably 0~10；B is 5~100 integers, and wherein b is preferred
5~50, a+b are 5~100 integers, and the hydrogen-containing siloxane is the single pure substance or at least two pure for meeting chemical general formula
The mixture of net object composition；
The inhibitor include: 3- methyl-1-butine-3- alcohol, methylpentynol, 3- methyl-1-hexin-3- alcohol,
1- acetenyl -1- cyclohexanol.
7. described in any item low compression set silastic materials according to claim 1~2, which is characterized in that described to have
Machine polysiloxanes is pure substance or mixture.
8. described in any item low compression set silastic materials according to claim 1~2, which is characterized in that the rouge
Fat acid esters is the condensation product of the unary fatty acid of C6~C30 and the unitary fatty alcohol of C6~C30.
9. described in any item low compression set silastic materials according to claim 1~2, which is characterized in that the knot
Structure controlling agent is organopolysiloxane of the strand joint number 2~100, the chemical general formula of the structuring control just are as follows:
Wherein, R " includes hydroxyl, methoxyl group, ethyoxyl, dimethylamino, diethylamino；R " ' includes methyl, phenyl, hydroxyl
Base, vinyl；C is the arbitrary integer between 0~100；D is the arbitrary integer between 0~20；The antistructurizing agent meets
The mixture of the single pure substance of chemical general formula or at least two pure substances composition.
10. the preparation method of low compression set silastic material according to any one of claims 1 to 9, comprising:
It weighs required organopolysiloxane, filler, aliphatic ester and antistructurizing agent to be mixed, it is compound to obtain silicon rubber
Object；
The silicone rubber compound that mixing is completed carries out mixing reaction, obtains silicone rubber compounds N1.
The silicone rubber compounds N1 is placed under room temperature environment and is stood；
The silicone rubber compounds N1 after standing is mixed with crosslinking agent, obtains silicone rubber compounds N2；
By silicone rubber compounds N2 curing molding, silicone elastomer is obtained.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113004699A (en) * | 2019-12-20 | 2021-06-22 | 洛阳尖端技术研究院 | Silicon rubber and product thereof |
| CN113881236A (en) * | 2021-11-01 | 2022-01-04 | 沅陵县成瑞祥粉体材料科技有限公司 | Preparation method of flame-retardant low-temperature-resistant organic silicon rubber |
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