JP5146680B2 - Anti-stick silicone rubber - Google Patents
Anti-stick silicone rubber Download PDFInfo
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- JP5146680B2 JP5146680B2 JP2008323258A JP2008323258A JP5146680B2 JP 5146680 B2 JP5146680 B2 JP 5146680B2 JP 2008323258 A JP2008323258 A JP 2008323258A JP 2008323258 A JP2008323258 A JP 2008323258A JP 5146680 B2 JP5146680 B2 JP 5146680B2
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- 229920002379 silicone rubber Polymers 0.000 title claims description 69
- 239000004945 silicone rubber Substances 0.000 title claims description 69
- 239000000203 mixture Substances 0.000 claims description 42
- 125000000217 alkyl group Chemical group 0.000 claims description 27
- 229920001296 polysiloxane Polymers 0.000 claims description 25
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 22
- 125000004432 carbon atom Chemical group C* 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 12
- 229920002545 silicone oil Polymers 0.000 claims description 11
- 229920006136 organohydrogenpolysiloxane Polymers 0.000 claims description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 7
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 7
- 238000002834 transmittance Methods 0.000 claims description 6
- 238000007259 addition reaction Methods 0.000 claims description 5
- 150000001451 organic peroxides Chemical class 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 17
- -1 dimethylsiloxane units Chemical group 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 239000011521 glass Substances 0.000 description 10
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 8
- 230000003405 preventing effect Effects 0.000 description 8
- 230000002265 prevention Effects 0.000 description 8
- 239000004205 dimethyl polysiloxane Substances 0.000 description 6
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- QYLFHLNFIHBCPR-UHFFFAOYSA-N 1-ethynylcyclohexan-1-ol Chemical compound C#CC1(O)CCCCC1 QYLFHLNFIHBCPR-UHFFFAOYSA-N 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 3
- 125000001309 chloro group Chemical group Cl* 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 3
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 125000001153 fluoro group Chemical group F* 0.000 description 3
- 150000008282 halocarbons Chemical group 0.000 description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229910002018 Aerosil® 300 Inorganic materials 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 125000004423 acyloxy group Chemical group 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000011231 conductive filler Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 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 description 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-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
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical group [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 125000005041 acyloxyalkyl group Chemical group 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- DDJSWKLBKSLAAZ-UHFFFAOYSA-N cyclotetrasiloxane Chemical compound O1[SiH2]O[SiH2]O[SiH2]O[SiH2]1 DDJSWKLBKSLAAZ-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 125000002704 decyl 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])* 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
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-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
- 150000002148 esters Chemical class 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([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])C([H])([H])[H] 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([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])[H] 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 150000004819 silanols Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 125000000725 trifluoropropyl group Chemical group [H]C([H])(*)C([H])([H])C(F)(F)F 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Description
本発明は、種々の環境下で長期間放置しても被着体、特にガラスに固着しないシリコーンゴム成形品に関し、より具体的には、自動車のフロントガラスと光学センサーの間に介在させる透明な導光体シートに使用される固着防止シリコーンゴムに関するものである。 The present invention relates to an adherend, particularly a silicone rubber molded article that does not adhere to glass even when left for a long period of time in various environments. More specifically, the present invention relates to a transparent material interposed between a windshield of an automobile and an optical sensor. The present invention relates to an anti-adhesion silicone rubber used for a light guide sheet.
シリコーンゴムは、耐熱性、耐寒性、耐候性、電気特性等に優れていることから各種分野において広く利用されている。一方、シリコーンゴムは、一般的には離型性を有しているが、高温あるいは高温高湿の環境下で被着体に密着や固着することが知られている。 Silicone rubber is widely used in various fields because it is excellent in heat resistance, cold resistance, weather resistance, electrical properties, and the like. On the other hand, silicone rubber generally has releasability, but is known to adhere to and adhere to an adherend in a high temperature or high temperature and high humidity environment.
シリコーンゴムで被覆された電線は内部の銅線、錫メッキ銅線等の芯線とシリコーンゴムが熱処理により密着し、芯線からシリコーンゴムを剥離するのが難しくなる問題があった。この芯線との密着を解決するため、脂肪酸アミド（特開昭５７−１５９８５０号公報：特許文献１、特開昭５７−１５９８５１号公報：特許文献２）、脂肪酸金属塩（特開昭５９−１２９２５９号公報：特許文献３）、Ｎ，Ｎ’−アルキレンアミド（特開昭６４−４３５６３号公報：特許文献４）、オイル状又はワックス状のフッ素樹脂（特開平４−３５３５６６号公報：特許文献５）、エステルワックス（特開平１１−１４０３２１号公報：特許文献６）、フェニル基含有シリコーンオイル（特開２００５−８９５８７号公報：特許文献７）を添加する方法が提案されている。 An electric wire covered with silicone rubber has a problem that it becomes difficult to peel the silicone rubber from the core wire because the core wire such as an internal copper wire or tin-plated copper wire and the silicone rubber are adhered to each other by heat treatment. In order to solve the close contact with the core wire, fatty acid amide (Japanese Patent Laid-Open No. 57-159850: Patent Document 1, Japanese Patent Laid-Open No. 57-159551: Patent Document 2), fatty acid metal salt (Japanese Patent Laid-Open No. 59-129259) No .: Patent Document 3), N, N′-alkyleneamide (Japanese Patent Laid-Open No. 64-43563: Patent Document 4), Oil-like or wax-like fluororesin (Japanese Patent Laid-Open No. 4-353566: Patent Document 5) ), Ester wax (Japanese Patent Laid-Open No. 11-140321: Patent Document 6), and phenyl group-containing silicone oil (Japanese Patent Laid-Open No. 2005-89587: Patent Document 7) have been proposed.
また、シリコーンゴム製のプラグブーツとスパークプラグ碍子が高温放置下で固着することを防ぐため、パーフルオロアルキル基を有するオルガノポリシロキサンを添加する方法（特開平４−３４５６６３号公報：特許文献８）やパーフルオロアルキル基を有するオルガノポリシロキサンとフェニル基を有するオルガノポリシロキサンを併用する方法（特開平５−１４８４２２号公報：特許文献９）が提案されている。 Also, a method of adding an organopolysiloxane having a perfluoroalkyl group in order to prevent the silicone rubber plug boot and the spark plug insulator from sticking at high temperature (JP-A-4-345663: Patent Document 8) In addition, a method in which an organopolysiloxane having a perfluoroalkyl group and an organopolysiloxane having a phenyl group are used in combination (JP-A-5-148422: Patent Document 9) has been proposed.
これらの密着あるいは固着防止の添加剤が固体の場合、融点以下の温度では防止効果が発現しにくくなり、液体の場合は、徐々にブリードアウトするため経時で防止効果が低減してくる可能性がある。
いずれの方法も被着体がガラスの場合、密着あるいは固着防止の効果があるかは記載されていない。
When these adhesion or sticking prevention additives are solid, the prevention effect is less likely to occur at temperatures below the melting point, and in the case of liquids, the prevention effect may be reduced over time due to bleed out gradually. is there.
In either method, when the adherend is made of glass, it is not described whether it has an effect of adhesion or prevention of adhesion.
更に、ガラスに密着防止効果があるものとして、フッ素基置換一価炭化水素基とアルカノイルオキシ基を併有するシランあるいはアルカノイルオキシ基又はアルカノイルオキシアルキル基を有するオルガノポリシロキサンを添加する方法（特開平３−１３４０６０号公報：特許文献１０）が提案されているが、液体であるので徐々に防止効果が低減してくる可能性がある。また、室温放置でのガラスに密着防止効果は例示されているが、高温高湿での環境下での効果については明確ではない。 Further, a method of adding a silane having both a fluorine group-substituted monovalent hydrocarbon group and an alkanoyloxy group, or an organopolysiloxane having an alkanoyloxy group or an alkanoyloxyalkyl group as a glass having an adhesion preventing effect (JP-A-3 -134060 gazette: Patent Document 10) has been proposed, but since it is a liquid, the prevention effect may be gradually reduced. In addition, the adhesion preventing effect on glass at room temperature is exemplified, but the effect under high temperature and high humidity environment is not clear.
一方、熱伝導性シリコーンゴム組成物に炭素数６個以上の長鎖アルキル基を有するアルコキシシランを熱伝導性フィラーの分散剤として添加し、組成物の流動性を向上させる方法（特開平１１−２０９６１８号公報：特許文献１１、特開２０００−１６１６号公報：特許文献１２）が提案されている。これらはシリコーンゴムの固着防止ではなく、熱伝導性フィラー表面を、長鎖アルキル基を有するアルコキシシランで処理し、高充填しても粘度上昇しない加工性良好な材料にすることにより、低硬度高熱伝導性シリコーンゴム成形品を得ることが目的である。 On the other hand, a method for improving the fluidity of the composition by adding an alkoxysilane having a long-chain alkyl group having 6 or more carbon atoms to the thermally conductive silicone rubber composition as a dispersant for the thermally conductive filler (Japanese Patent Application Laid-Open No. 11-1999). No. 209618: Patent Document 11 and Japanese Patent Laid-Open No. 2000-1616: Patent Document 12) have been proposed. These are not prevention of sticking of silicone rubber, but the surface of the heat conductive filler is treated with alkoxysilane having a long-chain alkyl group to make it a material with good workability that does not increase viscosity even when highly filled, resulting in low hardness and high heat The purpose is to obtain a conductive silicone rubber molded product.
本発明は、上記事情に鑑みなされたもので、種々の環境下で長期間放置しても被着体に固着しないあるいは固着しにくいシリコーンゴム成形品、特に高温高湿下でガラスに固着しないシリコーンゴム成形品を提供することを目的とする。 The present invention has been made in view of the above circumstances, and is a silicone rubber molded product that does not adhere to an adherend or is difficult to adhere even if left for a long time in various environments, particularly silicone that does not adhere to glass under high temperature and high humidity. An object is to provide a rubber molded product.
本発明者らは、上記目的を達成するために鋭意検討を重ねた結果、炭素数６個以上の長鎖アルキル基を有するアルコキシシランを添加したシリコーンゴム組成物を硬化してなるシリコーンゴムを被着体と接触させた場合、経時での固着防止効果がほとんど低減しないことを見出し、本発明をなすに至った。
このような効果が得られる理由は必ずしも明確ではなく、以下の理論に拘束されるものではないが、上記長鎖アルキル基を有するアルコキシシランが、シリコーンゴムよりブリードし、被着体表面の水分によりこの長鎖アルキル基を有するアルコキシシランのアルコキシ基が加水分解して被着体表面に層を形成し、この層はその表面（シリコーンゴム側に接する面）に長鎖アルキル基が存在することにより、シリコーンゴム層と被着体との固着が防止されて容易に剥離するためと思われる。
As a result of intensive studies to achieve the above object, the present inventors have applied a silicone rubber obtained by curing a silicone rubber composition to which an alkoxysilane having a long-chain alkyl group having 6 or more carbon atoms is added. It has been found that when it is brought into contact with the adherend, the effect of preventing sticking with time is hardly reduced, and the present invention has been made.
The reason why such an effect is obtained is not necessarily clear and is not restricted by the following theory, but the alkoxysilane having the long-chain alkyl group bleeds from the silicone rubber, and is caused by moisture on the adherend surface. The alkoxy group of the alkoxysilane having the long chain alkyl group is hydrolyzed to form a layer on the surface of the adherend, and this layer has a long chain alkyl group on the surface (surface contacting the silicone rubber side). This is probably because the silicone rubber layer and the adherend are prevented from being fixed and easily peeled off.
従って、本発明は、下記固着防止シリコーンゴムを提供する。
〔請求項１〕
（Ａ）下記平均組成式（１）
Ｒ1 aＳｉＯ(4-a)/2 （１）
（式中、Ｒ1は置換もしくは非置換の炭素数１〜８の一価炭化水素基、ａは１．９５〜２．０５の正数である。）
で表される１分子中に少なくとも２個のケイ素原子に結合するアルケニル基を有するオルガノポリシロキサン： １００質量部、
（Ｂ）下記一般式（２）
Ｒ2 bＲ3 cＳｉ（ＯＲ4）4-b-c （２）
（式中、Ｒ2は炭素数６〜１５のアルキル基、Ｒ3は置換もしくは非置換の炭素数１〜８の一価炭化水素基、Ｒ4は炭素数１〜６のアルキル基、ｂは１〜３の整数、ｃは０〜２の整数、ｂ＋ｃは１〜３の整数である。）
で表されるアルコキシシラン： ０．１〜５質量部、
（Ｃ）ケイ素原子に結合した水素原子を１分子中に２個以上含有するオルガノハイドロジェンポリシロキサンと白金族系触媒からなる付加反応型硬化剤又は有機過酸化物：
硬化に必要な量
を含有する組成物を硬化してなるシリコーンゴムであり、高温高湿８５℃×８５％ＲＨの環境下で硬化シリコーンゴムが被着体に固着しないことを特徴とする固着防止シリコーンゴム。
〔請求項２〕
更に、成分（Ｄ）として、２５℃における粘度が０．１〜２Ｐａ・ｓであり、フェニル基を３〜５０モル％含有するフェニル基含有シリコーンオイル： ０．１〜５質量部
を含有する組成物であることを特徴とする請求項１に記載の固着防止シリコーンゴム。
〔請求項３〕
厚さ２ｍｍのシリコーンゴムの光透過率（波長８００ｎｍ）が８５％以上であることを特徴とする請求項１又は２に記載の固着防止シリコーンゴム。
〔請求項４〕
ＪＩＳ Ｋ ６２５３規定のタイプＥデュロメータにより測定されるシリコーンゴムの硬さが７０以下であることを特徴とする請求項１〜３のいずれか１項に記載の固着防止シリコーンゴム。
Accordingly, the present invention provides the following anti-stick silicone rubber.
[Claim 1]
(A) The following average composition formula (1)
R 1 a SiO (4-a) / 2 (1)
(In the formula, R 1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and a is a positive number of 1.95 to 2.05.)
An organopolysiloxane having an alkenyl group bonded to at least two silicon atoms in one molecule represented by: 100 parts by mass
(B) The following general formula (2)
R 2 b R 3 c Si (OR 4 ) 4-bc (2)
(Wherein R 2 is an alkyl group having 6 to 15 carbon atoms, R 3 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, R 4 is an alkyl group having 1 to 6 carbon atoms, and b is An integer of 1 to 3, c is an integer of 0 to 2, and b + c is an integer of 1 to 3.)
Alkoxysilane represented by: 0.1 to 5 parts by mass,
(C) Addition reaction type curing agent or organic peroxide comprising an organohydrogenpolysiloxane containing two or more hydrogen atoms bonded to silicon atoms in one molecule and a platinum group catalyst :
A silicone rubber obtained by curing a composition containing an amount necessary for curing, wherein the cured silicone rubber does not adhere to an adherend in an environment of high temperature and high humidity of 85 ° C. and 85% RH. silicone rubber.
[Claim 2]
Furthermore, as a component (D), the viscosity in 25 degreeC is 0.1-2 Pa.s, the phenyl group containing silicone oil which contains 3-50 mol% of phenyl groups: The composition containing 0.1-5 mass parts The sticking-preventing silicone rubber according to claim 1, which is a product.
[Claim 3]
The anti-adhesion silicone rubber according to claim 1 or 2, wherein the silicone rubber having a thickness of 2 mm has a light transmittance (wavelength of 800 nm) of 85% or more.
[Claim 4]
The anti-adhesion silicone rubber according to any one of claims 1 to 3, wherein the silicone rubber has a hardness of 70 or less as measured by a type E durometer according to JIS K 6253.
本発明のシリコーンゴム成形品は、種々の環境下で放置しても被着体と固着しないので、装置に組み込まれても保守・点検時に取り外すことができる。特にシリコーンゴムが固着しやすい高温高湿の環境下でのガラスへの固着防止効果が維持できる。 Since the silicone rubber molded article of the present invention does not adhere to the adherend even if left under various environments, it can be removed during maintenance and inspection even if it is incorporated in the apparatus. In particular, it is possible to maintain the effect of preventing adhesion to glass in a high-temperature and high-humidity environment in which silicone rubber is easily fixed.
以下、本発明を詳細に説明する。
本発明の固着防止シリコーンゴムは、
（Ａ）下記平均組成式（１）で表されるオルガノポリシロキサン、
Ｒ1 aＳｉＯ(4-a)/2 （１）
（式中、Ｒ1は置換もしくは非置換の炭素数１〜８の一価炭化水素基、ａは１．９５〜２．０５の正数である。）
（Ｂ）下記一般式（２）で表されるアルコキシシラン、
Ｒ2 bＲ3 cＳｉ（ＯＲ4）4-b-c （２）
（式中、Ｒ2は炭素数６〜１５のアルキル基、Ｒ3は置換もしくは非置換の炭素数１〜８の一価炭化水素基、Ｒ4は炭素数１〜６のアルキル基、ｂは１〜３の整数、ｃは０〜２の整数、ｂ＋ｃは１〜３の整数である。）
（Ｃ）硬化剤、
好ましくは更に
（Ｄ）２５℃における粘度が０．１〜２Ｐａ・ｓであり、フェニル基を３〜５０モル％含有するフェニル基含有シリコーンオイル
を含有するシリコーンゴム組成物を硬化してなるものである。
Hereinafter, the present invention will be described in detail.
The anti-stick silicone rubber of the present invention is
(A) an organopolysiloxane represented by the following average composition formula (1):
R 1 a SiO (4-a) / 2 (1)
(In the formula, R 1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and a is a positive number of 1.95 to 2.05.)
(B) an alkoxysilane represented by the following general formula (2):
R 2 b R 3 c Si (OR 4 ) 4-bc (2)
(Wherein R 2 is an alkyl group having 6 to 15 carbon atoms, R 3 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, R 4 is an alkyl group having 1 to 6 carbon atoms, and b is An integer of 1 to 3, c is an integer of 0 to 2, and b + c is an integer of 1 to 3.)
(C) a curing agent,
Preferably (D) is obtained by curing a silicone rubber composition containing a phenyl group-containing silicone oil having a viscosity at 25 ° C. of 0.1 to 2 Pa · s and containing 3 to 50 mol% of phenyl groups. is there.
本発明のシリコーンゴム組成物のうち、（Ａ）成分のオルガノポリシロキサンは、下記平均組成式（１）で表されるものである。
Ｒ1 aＳｉＯ(4-a)/2 （１）
（式中、ａは１．９５〜２．０５の正数である。）
Among the silicone rubber compositions of the present invention, the (A) component organopolysiloxane is represented by the following average composition formula (1).
R 1 a SiO (4-a) / 2 (1)
(In the formula, a is a positive number of 1.95 to 2.05.)
式中、Ｒ1は置換又は非置換の炭素数１〜８の一価炭化水素基を表し、具体例としては、メチル基、エチル基、プロピル基等のアルキル基、シクロペンチル基、シクロヘキシル基等のシクロアルキル基、ビニル基、アリル基等のアルケニル基、フェニル基、トリル基等のアリール基、あるいはこれらの水素原子が部分的に塩素原子、フッ素原子などで置換されたハロゲン化炭化水素基等が例示される。 In the formula, R 1 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and specific examples thereof include alkyl groups such as a methyl group, an ethyl group, and a propyl group, a cyclopentyl group, a cyclohexyl group, and the like. An alkenyl group such as a cycloalkyl group, a vinyl group or an allyl group; an aryl group such as a phenyl group or a tolyl group; or a halogenated hydrocarbon group in which these hydrogen atoms are partially substituted by chlorine atoms, fluorine atoms, etc. Illustrated.
一般的には、オルガノポリシロキサンの主鎖がジメチルシロキサン単位からなるもの、あるいはこのオルガノポリシロキサンの主鎖にビニル基、フェニル基、トリフルオロプロピル基などを導入したものが好ましい。また、分子鎖末端がトリオルガノシリル基又は水酸基で封鎖されたものとすればよいが、このトリオルガノシリル基としてはトリメチルシリル基、ジメチルビニルシリル基、トリビニルシリル基などが例示される。 In general, those in which the main chain of the organopolysiloxane consists of dimethylsiloxane units, or those in which a vinyl group, a phenyl group, a trifluoropropyl group or the like is introduced into the main chain of the organopolysiloxane are preferred. The molecular chain terminal may be blocked with a triorganosilyl group or a hydroxyl group. Examples of the triorganosilyl group include a trimethylsilyl group, a dimethylvinylsilyl group, and a trivinylsilyl group.
このオルガノポリシロキサンの平均重合度は２００以上、特に３００以上であることが好ましく、平均重合度が２００未満では硬化後の機械的強度が劣り、脆くなる場合がある。また、このオルガノポリシロキサンの２５℃における粘度は０．３Ｐａ・ｓ以上、特に０．６Ｐａ・ｓ以上であることが好ましく、０．３Ｐａ・ｓ未満であると同様に硬化後の機械的強度が劣り、脆くなる場合がある。なお、本発明において、粘度は回転粘度計により測定できる（以下、同じ）。 The average degree of polymerization of the organopolysiloxane is preferably 200 or more, particularly preferably 300 or more. If the average degree of polymerization is less than 200, the mechanical strength after curing may be inferior and may become brittle. Further, the viscosity of this organopolysiloxane at 25 ° C. is preferably 0.3 Pa · s or more, particularly preferably 0.6 Pa · s or more, and if it is less than 0.3 Pa · s, the mechanical strength after curing is similarly high. It may be inferior and brittle. In the present invention, the viscosity can be measured with a rotational viscometer (hereinafter the same).
なお、シリコーンゴム組成物を液状タイプの組成物とする場合、上記オルガノポリシロキサンの平均重合度を２００〜２，０００あるいは２５℃における粘度を０．３〜２００Ｐａ・ｓとすることが好ましく、ミラブルタイプの組成物とする場合、平均重合度を６，０００〜１２，０００とすることが好ましい。 When the silicone rubber composition is a liquid type composition, the average degree of polymerization of the organopolysiloxane is preferably 200 to 2,000, or the viscosity at 25 ° C. is preferably 0.3 to 200 Pa · s. When setting it as a type composition, it is preferable that an average degree of polymerization shall be 6,000-12,000.
また、このオルガノポリシロキサンは、１分子中に少なくとも２個のケイ素原子に結合するアルケニル基を有することが好ましく、Ｒ1のうち０．００１〜５モル％、特に０．０１〜１モル％のビニル基を含有することが好ましい。 Further, this organopolysiloxane preferably has an alkenyl group bonded to at least two silicon atoms in one molecule, and 0.001 to 5 mol%, particularly 0.01 to 1 mol% of R 1 . It preferably contains a vinyl group.
（Ｂ）成分のアルコキシシランは、下記一般式（２）で表されるものである。
Ｒ2 bＲ3 cＳｉ（ＯＲ4）4-b-c （２）
The alkoxysilane as the component (B) is represented by the following general formula (2).
R 2 b R 3 c Si (OR 4 ) 4-bc (2)
上記式中のＲ2は炭素数６〜１５の長鎖アルキル基であり、具体例としては、ノニル基、デシル基、ドデシル基、テトラデシル基等が挙げられる。炭素数が６より小さいと揮発性が高くなりシリコーンゴムの固着防止効果が十分でなくなり、１５より大きいとアルコキシシランが常温で固化するので取り扱いが不便な上、被着体との反応性が低下する。 R 2 in the above formula is a long-chain alkyl group having 6 to 15 carbon atoms, and specific examples include nonyl group, decyl group, dodecyl group, tetradecyl group and the like. If the carbon number is less than 6, the volatility becomes high and the silicone rubber sticking prevention effect is not sufficient. If it is more than 15, the alkoxysilane is solidified at room temperature, which is inconvenient to handle and the reactivity with the adherend decreases. To do.
また、上記式中のＲ3は置換もしくは非置換の炭素数１〜８の一価の炭化水素基であり、具体例としては、メチル基、エチル基、プロピル基、ヘキシル基、オクチル基等のアルキル基、シクロペンチル基、シクロヘキシル基等のシクロアルキル基、ビニル基、アリル基等のアルケニル基、フェニル基、トリル基等のアリール基、あるいはこれらの水素原子が部分的に塩素原子、フッ素原子などで置換されたハロゲン化炭化水素基等が挙げられるが、特にメチル基、エチル基が好ましい。Ｒ4はメチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基などの炭素数１〜６の１種もしくは２種以上のアルキル基であり、特にメチル基、エチル基が好ましい。 R 3 in the above formula is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms. Specific examples thereof include a methyl group, an ethyl group, a propyl group, a hexyl group, and an octyl group. Alkyl groups such as alkyl groups, cyclopentyl groups and cyclohexyl groups, alkenyl groups such as vinyl groups and allyl groups, aryl groups such as phenyl groups and tolyl groups, or hydrogen atoms thereof are partially chlorine atoms, fluorine atoms, etc. Examples thereof include a substituted halogenated hydrocarbon group, and a methyl group and an ethyl group are particularly preferable. R 4 is one or more alkyl groups having 1 to 6 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, and a methyl group and an ethyl group are particularly preferable.
また、ｂは１〜３の整数であるが、特に１であることが好ましい。ｃは０〜２の整数、ｂ＋ｃは１〜３の整数である。 Further, b is an integer of 1 to 3, but 1 is particularly preferable. c is an integer of 0 to 2, and b + c is an integer of 1 to 3.
一般式（２）で表されるアルコキシシランの具体例としては、次のものを挙げることができる。
Ｃ6Ｈ13Ｓｉ（ＯＣＨ3）3、Ｃ8Ｈ17Ｓｉ（ＯＣ2Ｈ5）3、
Ｃ10Ｈ21Ｓｉ（ＯＣＨ3）3、Ｃ12Ｈ25Ｓｉ（ＯＣＨ3）3、
Ｃ10Ｈ21Ｓｉ（ＣＨ3）（ＯＣＨ3）2、Ｃ10Ｈ21Ｓｉ（Ｃ6Ｈ5）（ＯＣＨ3）2、
Ｃ10Ｈ21Ｓｉ（ＣＨ3）（ＯＣ2Ｈ5）2、
Ｃ10Ｈ21Ｓｉ（ＣＨ＝ＣＨ2）（ＯＣＨ3）2、
Ｃ10Ｈ21Ｓｉ（ＣＨ2ＣＨ2ＣＦ3）（ＯＣＨ3）2
Specific examples of the alkoxysilane represented by the general formula (2) include the following.
C 6 H 13 Si (OCH 3 ) 3 , C 8 H 17 Si (OC 2 H 5 ) 3 ,
C 10 H 21 Si (OCH 3 ) 3 , C 12 H 25 Si (OCH 3 ) 3 ,
C 10 H 21 Si (CH 3 ) (OCH 3 ) 2 , C 10 H 21 Si (C 6 H 5 ) (OCH 3 ) 2 ,
C 10 H 21 Si (CH 3 ) (OC 2 H 5 ) 2 ,
C 10 H 21 Si (CH═CH 2 ) (OCH 3 ) 2 ,
C 10 H 21 Si (CH 2 CH 2 CF 3 ) (OCH 3 ) 2
（Ｂ）成分のアルコキシシランの添加量は、（Ａ）成分のオルガノポリシロキサン１００質量部に対して０．１〜５質量部である。添加量が０．１質量部未満では固着防止効果が十分発揮されない。一方、５質量部より多くしても固着防止効果が増大せず、また不経済である。より好ましい添加量は０．２〜３質量部である。 (B) The addition amount of the alkoxysilane of a component is 0.1-5 mass parts with respect to 100 mass parts of (A) component organopolysiloxane. When the addition amount is less than 0.1 parts by mass, the effect of preventing sticking is not sufficiently exhibited. On the other hand, even if it exceeds 5 parts by mass, the effect of preventing sticking does not increase, and it is uneconomical. A more preferable addition amount is 0.2 to 3 parts by mass.
（Ｃ）成分の硬化剤は特に限定されるものではなく、シリコーンゴムの硬化に使用される公知の硬化剤の中から適宜選択することができる。
上記硬化剤の具体例としては、ジ−ｔ−ブチルパーオキサイド、２，５−ジメチル−２，５−ジ（ｔ−ブチルパーオキシ）ヘキサン、ジクミルパーオキサイド等のラジカル反応に使用される有機過酸化物、また（Ａ）成分のオルガノポリシロキサンがアルケニル基を有する場合は、ケイ素原子に結合した水素原子を１分子中に２個以上含有するオルガノハイドロジェンポリシロキサンと白金族系触媒からなる付加反応型硬化剤等が挙げられ、この添加量は通常のシリコーンゴム組成物と同様にすればよい。
The curing agent for component (C) is not particularly limited, and can be appropriately selected from known curing agents used for curing silicone rubber.
Specific examples of the curing agent include organic compounds used for radical reactions such as di-t-butyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, dicumyl peroxide, and the like. When the peroxide or the organopolysiloxane of component (A) has an alkenyl group, it consists of an organohydrogenpolysiloxane containing two or more hydrogen atoms bonded to silicon atoms in one molecule and a platinum group catalyst. An addition reaction type curing agent may be used, and the amount added may be the same as that of a normal silicone rubber composition.
更に、（Ｄ）成分のフェニル基含有シリコーンオイルは任意成分であり、シリコーンゴム表面にブリードすることにより被着体への固着防止効果を補助するものである。 Furthermore, the phenyl group-containing silicone oil of component (D) is an optional component and assists the effect of preventing adhesion to the adherend by bleeding on the silicone rubber surface.
（Ｄ）成分は、２５℃における粘度が０．１〜２Ｐａ・ｓであり、フェニル基を３〜５０モル％含有するフェニル基含有シリコーンオイルであり、下記一般式（３）で表されるものであることが好ましい。
上記式中、Ｒ5は水酸基又は置換もしくは非置換の炭素数１〜８の一価炭化水素基であり、具体例としては、水酸基又はメチル基、エチル基、プロピル基、ヘキシル基等のアルキル基、シクロペンチル基、シクロヘキシル基等のシクロアルキル基、ビニル基、アリル基等のアルケニル基、あるいはこれらの水素原子が部分的に塩素原子、フッ素原子などで置換されたハロゲン化炭化水素基などが挙げられるが、特に水酸基、メチル基、エチル基が好ましい。Ｒ6は置換もしくは非置換の炭素数１〜８の一価炭化水素基であり、上述したＲ5の一価炭化水素基と同様のものが例示でき、特にメチル基、エチル基が好ましく、かつ全Ｒ6のうち３〜５０モル％、特に５〜２５モル％がフェニル基である。フェニル基が３モル％未満ではシリコーンゴムとの相溶性が良くなり、ブリードしにくくなる場合があり、５０モル％より多いと初期のブリード量が多くなり、直ぐに固着防止効果が消失する場合がある。また、ｍは２〜３００の整数である。 In the above formula, R 5 is a hydroxyl group or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms. Specific examples include a hydroxyl group or an alkyl group such as a methyl group, an ethyl group, a propyl group, or a hexyl group. Cycloalkyl groups such as cyclopentyl group and cyclohexyl group, alkenyl groups such as vinyl group and allyl group, or halogenated hydrocarbon groups in which these hydrogen atoms are partially substituted by chlorine atoms, fluorine atoms, etc. However, a hydroxyl group, a methyl group, and an ethyl group are particularly preferable. R 6 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and examples thereof are the same as the monovalent hydrocarbon group of R 5 described above, particularly preferably a methyl group or an ethyl group, 3-50 mole% of all R 6, in particular 5 to 25 mol% are phenyl groups. If the phenyl group is less than 3 mol%, the compatibility with the silicone rubber is improved and bleeding may be difficult. If it exceeds 50 mol%, the initial bleed amount increases, and the anti-adhesion effect may immediately disappear. . M is an integer of 2 to 300.
フェニル基含有シリコーンオイルの２５℃における粘度は０．１〜２Ｐａ・ｓであり、好ましくは０．２〜１Ｐａ・ｓである。粘度が０．１Ｐａ・ｓ未満では初期のブリード量が多くなり、直ぐに固着防止効果が消失する場合があり、２Ｐａ・ｓより高いとブリードしにくくなる場合がある。 The viscosity at 25 ° C. of the phenyl group-containing silicone oil is 0.1 to 2 Pa · s, preferably 0.2 to 1 Pa · s. If the viscosity is less than 0.1 Pa · s, the initial bleed amount increases, and the effect of preventing sticking may disappear immediately, and if it is higher than 2 Pa · s, bleed may become difficult.
（Ｄ）成分の添加量は、（Ａ）成分のオルガノポリシロキサン１００質量部に対して０．１〜５質量部であることが好ましく、より好ましい添加量は０．２〜３質量部である。５質量部より多くしても固着防止効果が増大せず、反対にブリード量増加による周囲の汚染等の問題が生じる場合がある。 (D) It is preferable that the addition amount of a component is 0.1-5 mass parts with respect to 100 mass parts of (A) component organopolysiloxane, and a more preferable addition amount is 0.2-3 mass parts. . Even if the amount is more than 5 parts by mass, the anti-adhesion effect does not increase, and conversely, problems such as surrounding contamination due to an increase in the amount of bleeding may occur.
本発明に用いるシリコーンゴム組成物には、その他添加成分として、本発明の効果を損なわない程度の親水性シリカ、疎水性シリカ等の補強性シリカ充填剤、クレイ、炭酸カルシウム、けいそう土、二酸化チタン等の充填剤、低分子シロキサンエステル、シラノール、シラザン等の分散剤、強度向上や粘着性を付与させるシリコーン樹脂共重合体、シランカップリング剤、チタンカップリング剤等の接着付与剤、難燃性を付与させる白金族系触媒、顔料等の着色剤、酸化鉄、酸化セリウム等の耐熱性向上剤、付加反応での組成物の硬化速度、保存安定性を調節する反応制御剤、例えばメチルビニルシクロテトラシロキサン等のビニル基含有オルガノポリシロキサン、トリアリルイソシアヌレート、エチニルシクロヘキサノール、アセチレンアルコール及びそのシロキサン変性物などを配合することができる。 In the silicone rubber composition used in the present invention, as other additive components, reinforcing silica fillers such as hydrophilic silica and hydrophobic silica that do not impair the effects of the present invention, clay, calcium carbonate, diatomaceous earth, dioxide Fillers such as titanium, dispersants such as low molecular siloxane esters, silanols, silazanes, silicone resin copolymers that impart strength and tackiness, adhesion imparting agents such as silane coupling agents, titanium coupling agents, flame retardant Platinum group catalyst for imparting properties, colorants such as pigments, heat resistance improvers such as iron oxide and cerium oxide, reaction control agents for adjusting the curing speed and storage stability of the composition in the addition reaction, for example, methyl vinyl Vinyl group-containing organopolysiloxane such as cyclotetrasiloxane, triallyl isocyanurate, ethynylcyclohexanol, acetylene a It can be blended such as call and siloxane modified products.
本発明は、最初に（Ａ）成分のオルガノポリシロキサンと（Ｂ）成分のアルコキシシラン、任意成分である（Ｄ）成分のフェニル基含有シリコーンオイル、更にその他添加成分をプラネタリミキサー、ニーダー、品川ミキサー、二本ロール等の混合機で混練し、成形前に（Ｃ）成分である硬化剤を添加配合することにより未硬化の固着防止シリコーンゴム組成物を製造することができる。 In the present invention, the first component (A) is an organopolysiloxane, the component (B) is an alkoxysilane, the component (D) is a phenyl group-containing silicone oil, and the other additive components are a planetary mixer, a kneader, and a Shinagawa mixer. The uncured anti-adhesion silicone rubber composition can be produced by kneading with a mixer such as a two-roller and adding and blending the curing agent as component (C) before molding.
固着防止シリコーンゴム組成物の成形硬化方法としては次の方法が例示できる。 The following method can be illustrated as a shaping | molding hardening method of a sticking prevention silicone rubber composition.
モールド成形：金型中に未硬化の組成物を仕込み、金型を締めてから熱プレス機により圧力と熱をかけ組成物を硬化させる。 Molding: An uncured composition is charged into a mold, and after tightening the mold, the composition is cured by applying pressure and heat with a hot press.
射出成形：射出成形機上の加熱した金型の中にノズルから未硬化の組成物を射出して金型のキャビティ内に充填する。硬化後金型を開け、成形品を取り出す。 Injection molding: An uncured composition is injected from a nozzle into a heated mold on an injection molding machine and filled into the mold cavity. After curing, open the mold and take out the molded product.
コーティング成形：コーティング装置に連続的にフィルム（例えば、ＰＥＴ）を供給し、この上に未硬化の液状組成物をナイフコータ等により一定の厚さに塗布してから加熱炉を通して液状組成物を硬化させる。 Coating molding: A film (for example, PET) is continuously supplied to a coating apparatus, and an uncured liquid composition is applied onto the coating apparatus to a certain thickness with a knife coater or the like, and then the liquid composition is cured through a heating furnace. .
押出し成形：押出し機のダイスとニップルの組み合わせにより未硬化のミラブルタイプの組成物を任意のチューブ形状に成形してから、加熱炉を通して組成物を硬化させる。 Extrusion: An uncured millable type composition is formed into an arbitrary tube shape by a combination of an extruder die and nipple, and then the composition is cured through a heating furnace.
カレンダー成形：カレンダーロールにより未硬化のミラブルタイプの組成物を一定の厚さに分出し、フィルム上に組成物を転写してから加熱炉を通して組成物を硬化させる。 Calendering: An uncured millable type composition is dispensed to a certain thickness by a calender roll, and the composition is transferred onto a film and then cured through a heating furnace.
なお、上記シリコーンゴム組成物の硬化条件としては、温度１００〜４００℃で１０秒〜３０分間加熱すればよいが、成形サイクルやライン速度により温度と時間を調整することが望ましい。 The silicone rubber composition may be cured at a temperature of 100 to 400 ° C. for 10 seconds to 30 minutes, but it is desirable to adjust the temperature and time depending on the molding cycle and line speed.
本発明の固着防止シリコーンゴム成形品を被着体の間に挟みパッキンとして使用する場合は、硬さが低いほど気密性が良好となるので、ＪＩＳ Ｋ ６２５３規定のタイプＥデュロメータにより測定されるゴムの硬さが７０以下であることが好ましい。より好ましくは硬さ４０以下である。ゴムの硬さが７０を超えると被着体との密着性が悪くなり界面に空気を取り込むおそれがある。
シリコーンゴムの硬さが低くなると被着体に固着しやすくなるが、本発明においては、（Ｂ）成分の長鎖アルキル基を有するアルコキシシランの効果で固着を防ぐことができる。
When the anti-adhesive silicone rubber molded product of the present invention is used as a packing sandwiched between adherends, the lower the hardness, the better the airtightness. Therefore, rubber measured by a type E durometer defined in JIS K 6253 The hardness is preferably 70 or less. More preferably, the hardness is 40 or less. If the hardness of the rubber exceeds 70, the adhesion to the adherend is deteriorated and air may be taken into the interface.
When the hardness of the silicone rubber is low, it is easy to adhere to the adherend, but in the present invention, the adhesion can be prevented by the effect of the alkoxysilane having a long-chain alkyl group as the component (B).
なお、シリコーンゴムの上記硬さを７０以下、特に４０以下とするためには、液状タイプのシリコーンゴム組成物とし、付加反応硬化剤中のケイ素原子に結合した水素原子を１分子中に２個以上含有するオルガノハイドロジェンポリシロキサンの添加量を少なくすることが望ましい。 In order to make the hardness of the silicone rubber 70 or less, particularly 40 or less, a liquid type silicone rubber composition is used, and two hydrogen atoms bonded to silicon atoms in the addition reaction curing agent are contained in one molecule. It is desirable to reduce the amount of the organohydrogenpolysiloxane contained above.
また、光センサーとガラスの間の透明な導光体として使用する場合は、光量の減衰を小さくするため光透過率を高くする必要がある。分光光度計により測定される厚さ２ｍｍのシリコーンゴムの光透過率（波長８００ｎｍ）が８５％以上であることが好ましく、より好ましくは９０％以上である。 Moreover, when using as a transparent light guide between an optical sensor and glass, in order to make attenuation of light quantity small, it is necessary to make light transmittance high. The light transmittance (wavelength 800 nm) of the silicone rubber having a thickness of 2 mm measured by a spectrophotometer is preferably 85% or more, and more preferably 90% or more.
光透過率を８５％以上にするには、（Ａ）成分のオルガノポリシロキサンとの相溶性を良くすることが望ましいため、（Ｄ）成分のフェニル基含有シリコーンオイルのフェニル基の含有量やその他添加剤の充填剤の種類や配合量等について十分考慮し、シリコーンゴムの透明性を妨げない配合処方とする。 In order to increase the light transmittance to 85% or more, it is desirable to improve the compatibility with the organopolysiloxane of the component (A). Therefore, the content of the phenyl group of the phenyl group-containing silicone oil of the component (D) and other Adequate consideration is given to the type and amount of fillers used as additives, and the formulation does not hinder the transparency of the silicone rubber.
なお、被着体としては、ガラス、ステンレススチール、アルミニウム、鉄、銅、ニッケル、クロム、セラミック、プラスチック等が例示できる。 Examples of the adherend include glass, stainless steel, aluminum, iron, copper, nickel, chromium, ceramic, and plastic.
本発明のシリコーンゴムは、種々の環境下で長期間放置しても被着体に固着しないあるいは固着しにくいものであり、特に高温高湿（８５℃×８５％ＲＨ）の環境下でも被着体に固着しないあるいは固着しにくいものであり、とりわけ高温高湿下でガラスに固着しないあるいは固着しにくいものである。 The silicone rubber of the present invention does not adhere to the adherend even if it is left for a long period of time in various environments, or it is difficult to adhere to the adherend. Particularly, it can be applied even in an environment of high temperature and high humidity (85 ° C. × 85% RH). It does not adhere to the body or is difficult to adhere, and in particular, does not adhere to the glass under high temperature and high humidity or is difficult to adhere.
以下、実施例及び比較例を示し、本発明を具体的に説明するが、本発明はこれらの実施例に制限されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to these Examples.
［実施例１、比較例１］
（Ａ）成分として２５℃における粘度が３０Ｐａ・ｓのジメチルビニルシロキシ基で両末端を封止したジメチルポリシロキサン６５質量部、２５℃における粘度が０．７Ｐａ・ｓのメチルビニルシロキサン単位１ｍｏｌ％、ジメチルシロキサン単位９９ｍｏｌ％からなるメチルビニルポリシロキサン２３質量部、２５℃における粘度が１Ｐａ・ｓのジメチルポリシロキサン１２質量部からなる合計１００質量部のオルガノポリシロキサンに、ＢＥＴ法による比表面積３００ｍ2／ｇの補強性シリカ充填剤であるエアロジル３００（商品名、日本アエロジル株式会社製）２５質量部、分散剤としてヘキサメチルジシラザン５質量部、水１．２質量部を添加し、プラネタリミキサーにて室温で３０分間混合した後、温度１５０℃まで加熱してから３時間熱処理混合した（シリコーンゴムベースＩ）。
[Example 1, Comparative Example 1]
(A) 65 parts by mass of dimethylpolysiloxane having both ends sealed with a dimethylvinylsiloxy group having a viscosity of 30 Pa · s at 25 ° C. as a component, 1 mol% of a methyl vinyl siloxane unit having a viscosity of 0.7 Pa · s at 25 ° C. To a total of 100 parts by mass of organopolysiloxane consisting of 23 parts by mass of methylvinylpolysiloxane consisting of 99 mol% of dimethylsiloxane units and 12 parts by mass of dimethylpolysiloxane having a viscosity at 25 ° C. of 1 Pa · s, a specific surface area of 300 m 2 / 25 parts by mass of Aerosil 300 (trade name, manufactured by Nippon Aerosil Co., Ltd.), 5 parts by mass of hexamethyldisilazane, and 1.2 parts by mass of water are added as a dispersant, and a planetary mixer is used. Mix for 30 minutes at room temperature and then heat to 150 ° C And time heat treatment mixture (silicone rubber base I).
冷却後、（Ｂ）成分として下記構造式（４）
Ｃ10Ｈ21Ｓｉ（ＯＣＨ3）3 （４）
の長鎖アルキル基を有するアルコキシシラン１．２質量部を添加混合してから、（Ｃ）成分の硬化剤として触媒である塩化白金酸のビニルシロキサン錯体（白金含有量１質量％）０．１質量部と、反応制御剤であるエチニルシクロヘキサノール０．０５質量部を添加混合し、更に下記構造式（５）
C 10 H 21 Si (OCH 3 ) 3 (4)
After adding 1.2 parts by mass of alkoxysilane having a long-chain alkyl group, a vinyl siloxane complex of chloroplatinic acid (platinum content 1% by mass) 0.1 which is a catalyst as a curing agent for component (C) Part by mass and 0.05 part by mass of ethynylcyclohexanol which is a reaction control agent are added and mixed, and the following structural formula (5)
この固着防止シリコーンゴム組成物をモールド成形により１５０℃で１０分間加熱して厚さ２ｍｍのシートを作製し、タイプＥデュロメータ硬度計で硬さを測定した。また、分光光度計により波長８００ｎｍでの光透過率を測定し、更に下記に示す方法で被着体に対する固着性を評価した（実施例１）。 This anti-adhesion silicone rubber composition was heated at 150 ° C. for 10 minutes by molding to produce a sheet having a thickness of 2 mm, and the hardness was measured with a type E durometer hardness meter. Further, the light transmittance at a wavelength of 800 nm was measured with a spectrophotometer, and the adhesion to an adherend was evaluated by the method described below (Example 1).
また、比較のため、長鎖アルキル基を有するアルコキシシランを添加しない以外は上記と同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した（比較例１）。 For comparison, a sheet having a thickness of 2 mm was prepared in the same manner as described above except that no alkoxysilane having a long-chain alkyl group was added, and each characteristic was evaluated (Comparative Example 1).
［実施例２］
実施例１の長鎖アルキル基を有するアルコキシシランの添加量を３質量部に変更した以外は同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した。
[Example 2]
A sheet having a thickness of 2 mm was prepared in the same manner except that the addition amount of the alkoxysilane having a long-chain alkyl group in Example 1 was changed to 3 parts by mass, and each characteristic was evaluated.
［実施例３、比較例２］
（Ａ）成分として２５℃における粘度が３０Ｐａ・ｓのジメチルビニルシロキシ基で両末端を封止したジメチルポリシロキサン３５質量部、２５℃における粘度が０．７Ｐａ・ｓのメチルビニルシロキサン単位１ｍｏｌ％、ジメチルシロキサン単位９９ｍｏｌ％からなるメチルビニルポリシロキサン１５質量部、２５℃における粘度が１Ｐａ・ｓのジメチルポリシロキサン５０質量部からなる合計１００質量部のオルガノポリシロキサンに、ＢＥＴ法による比表面積３００ｍ2／ｇの補強性シリカ充填剤であるエアロジル３００（前出）１５質量部、分散剤としてヘキサメチルジシラザン３質量部、水０．８質量部を添加し、プラネタリミキサーにて室温で３０分間混合した後、温度１５０℃まで加熱してから３時間熱処理混合した（シリコーンゴムベースＩＩ）。
[Example 3, Comparative Example 2]
(A) 35 parts by mass of dimethylpolysiloxane having both ends sealed with a dimethylvinylsiloxy group having a viscosity at 25 ° C. of 30 Pa · s as a component, 1 mol% of a methylvinylsiloxane unit having a viscosity at 25 ° C. of 0.7 Pa · s, To a total of 100 parts by mass of organopolysiloxane consisting of 15 parts by mass of methylvinylpolysiloxane consisting of 99 mol% of dimethylsiloxane units and 50 parts by mass of dimethylpolysiloxane having a viscosity of 1 Pa · s at 25 ° C., a specific surface area of 300 m 2 / 15 parts by weight of Aerosil 300 (supra), which is a reinforcing silica filler of g, 3 parts by weight of hexamethyldisilazane and 0.8 parts by weight of water were added as a dispersant, and mixed for 30 minutes at room temperature using a planetary mixer. After that, the mixture was heated to 150 ° C. and heat-treated and mixed for 3 hours (silico Ngomubesu II).
冷却後、（Ｂ）成分として上記構造式（４）の長鎖アルキル基を有するアルコキシシラン０．７質量部を添加混合してから、（Ｃ）成分の硬化剤として触媒である塩化白金酸のビニルシロキサン錯体（白金含有量１質量％）０．１質量部と、反応制御剤であるエチニルシクロヘキサノール０．０５質量部を添加混合し、更に上記構造式（５）のオルガノハイドロジェンポリシロキサン０．３質量部と上記構造式（６）のオルガノハイドロジェンポリシロキサン１．６質量部を均一に混合して固着防止シリコーンゴム組成物を調製した。実施例１と同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した（実施例３）。 After cooling, 0.7 parts by mass of alkoxysilane having a long-chain alkyl group of the structural formula (4) as component (B) is added and mixed, and then the catalyst of chloroplatinic acid as a curing agent for component (C) is added. 0.1 parts by mass of a vinylsiloxane complex (platinum content 1% by mass) and 0.05 parts by mass of ethynylcyclohexanol which is a reaction control agent are added and mixed, and the organohydrogenpolysiloxane of the above structural formula (5) 0 3 parts by mass and 1.6 parts by mass of the organohydrogenpolysiloxane of the above structural formula (6) were uniformly mixed to prepare an anti-sticking silicone rubber composition. A sheet having a thickness of 2 mm was produced in the same manner as in Example 1, and each characteristic was evaluated (Example 3).
また、比較のため、長鎖アルキル基を有するアルコキシシランを添加しない以外は上記と同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した（比較例２）。 For comparison, a sheet having a thickness of 2 mm was prepared in the same manner as described above except that alkoxysilane having a long-chain alkyl group was not added, and each characteristic was evaluated (Comparative Example 2).
［実施例４、比較例３］
実施例３の固着防止シリコーンゴム組成物に、（Ｄ）成分の２５℃における粘度が１Ｐａ・ｓのジフェニルシロキサン単位５ｍｏｌ％、ジメチルシロキサン単位９５ｍｏｌ％からなるフェニル基含有シリコーンオイル０．７質量部を添加した以外は同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した（実施例４）。
[Example 4, Comparative Example 3]
In the anti-adhesion silicone rubber composition of Example 3, 0.7 parts by mass of a phenyl group-containing silicone oil composed of 5 mol% of diphenylsiloxane units and 95 mol% of dimethylsiloxane units having a viscosity at 25 ° C. of component (D) of 1 Pa · s. A sheet having a thickness of 2 mm was prepared in the same manner except that it was added, and each characteristic was evaluated (Example 4).
比較のため、比較例２の長鎖アルキル基を有するアルコキシシランを添加しないシリコーンゴム組成物に上記フェニル基含有シリコーンオイル０．７質量部を添加してから上記と同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した（比較例３）。 For comparison, 0.7 parts by mass of the phenyl group-containing silicone oil was added to the silicone rubber composition to which no alkoxysilane having a long-chain alkyl group of Comparative Example 2 was added, and then the thickness was 2 mm in the same manner as described above. A sheet was prepared and each characteristic was evaluated (Comparative Example 3).
［実施例５、比較例４］
（Ａ）成分として２５℃における粘度が５Ｐａ・ｓのジメチルビニルシロキシ基で両末端を封止したジメチルポリシロキサン６０質量部、２５℃における粘度が１Ｐａ・ｓのジメチルポリシロキサン４０質量部からなる合計１００質量部のオルガノポリシロキサンに、シリコーンゴムの強度を向上させる（ＣＨ3）3ＳｉＯ1/2単位、（ＣＨ2＝ＣＨ）（ＣＨ3）2ＳｉＯ1/2単位及びＳｉＯ2単位からなるシリコーン樹脂共重合体（［（ＣＨ3）3ＳｉＯ1/2単位と（ＣＨ2＝ＣＨ）（ＣＨ3）2ＳｉＯ1/2単位の合計］／ＳｉＯ2単位＝０．８（モル比）、ビニル基含有量＝０．０００８モル／ｇ）２０質量部、シリコーンゴムに粘着性を付与する（ＣＨ3）3ＳｉＯ1/2単位とＳｉＯ2単位からなるシリコーン樹脂共重合体（（ＣＨ3）3ＳｉＯ1/2単位／ＳｉＯ2単位＝０．７５（モル比））４０質量部を添加し、プラネタリミキサーにて室温で３０分間混合した（シリコーンゴムベースＩＩＩ）。
[Example 5, Comparative Example 4]
(A) 60 parts by mass of dimethylpolysiloxane having both ends sealed with dimethylvinylsiloxy groups having a viscosity of 5 Pa · s at 25 ° C. and 40 parts by mass of dimethylpolysiloxane having a viscosity of 1 Pa · s at 25 ° C. Silicone comprising (CH 3 ) 3 SiO 1/2 unit, (CH 2 ═CH) (CH 3 ) 2 SiO 1/2 unit and SiO 2 unit for improving strength of silicone rubber to 100 parts by mass of organopolysiloxane Resin copolymer ([(CH 3 ) 3 SiO 1/2 unit and (CH 2 ═CH) (CH 3 ) 2 SiO 1/2 unit]] / SiO 2 unit = 0.8 (molar ratio), vinyl Group content = 0.0008 mol / g) 20 parts by mass, silicone resin copolymer ((CH 3 ) 3 comprising (CH 3 ) 3 SiO 1/2 units and SiO 2 units, which gives silicone rubber tackiness) Si 1/2 units / SiO 2 units = 0.75 (molar ratio)) was added 40 parts by weight, and mixed for 30 minutes at room temperature planetary mixer (silicone rubber base III).
次に（Ｂ）成分として上記構造式（４）の長鎖アルキル基を有するアルコキシシラン１質量部を添加混合してから、（Ｃ）成分の硬化剤として触媒である塩化白金酸のビニルシロキサン錯体（白金含有量１質量％）０．１質量部と、反応制御剤であるエチニルシクロヘキサノール０．０５質量部を添加混合し、更に上記構造式（５）のオルガノハイドロジェンポリシロキサン２．３質量部を均一に混合して固着防止シリコーンゴム組成物を調製した。実施例１と同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した（実施例５）。 Next, 1 part by mass of alkoxysilane having a long-chain alkyl group of the above structural formula (4) is added and mixed as component (B), and then a vinylsiloxane complex of chloroplatinic acid which is a catalyst as a curing agent for component (C) (Platinum content 1% by mass) 0.1 part by mass and 0.05 part by mass of ethynylcyclohexanol which is a reaction control agent are added and mixed, and 2.3 mass of the organohydrogenpolysiloxane of the above structural formula (5). The parts were mixed uniformly to prepare an anti-stick silicone rubber composition. A sheet having a thickness of 2 mm was produced in the same manner as in Example 1, and each characteristic was evaluated (Example 5).
また、比較のため、長鎖アルキル基を有するアルコキシシランを添加しない以外は上記と同様な方法で厚さ２ｍｍのシートを作製し、各特性を評価した（比較例４）。 For comparison, a sheet having a thickness of 2 mm was prepared in the same manner as described above except that alkoxysilane having a long-chain alkyl group was not added, and each characteristic was evaluated (Comparative Example 4).
［固着性の評価方法］
厚さ２ｍｍで大きさ２５ｍｍ×３４ｍｍ角のシリコーンゴムシートを厚さ５ｍｍの被着体２枚の間に挟み、締め付け力１０Ｎのクリップ２ヶで固定した。これらのサンプルを８５℃×８５％ＲＨの恒温恒湿機中に放置して、５００時間及び１，０００時間後に取り出してシリコーンゴムと被着体の固着状態を確認した。被着体及び評価基準を下記に示す。
[Evaluation method of adhesiveness]
A silicone rubber sheet having a thickness of 2 mm and a size of 25 mm × 34 mm square was sandwiched between two adherends having a thickness of 5 mm and fixed with two clips having a tightening force of 10 N. These samples were left in a constant temperature and humidity chamber of 85 ° C. × 85% RH and taken out after 500 hours and 1,000 hours, and the adhesion state of the silicone rubber and the adherend was confirmed. The adherend and evaluation criteria are shown below.
被着体
ガラス：フロートガラス
ステンレススチール：ＳＵＳ３０４
アルミニウム：Ａ５０５２
Substrate Glass: Float glass Stainless steel: SUS304
Aluminum: A5052
固着性評価
◎：被着体との離型性良好。剥離が軽い。
○：被着体との離型性ＯＫ。剥離は◎より重い。
△：部分的な接着あり。
×：接着。
××：全面接着。シートが破壊。
Adhesion evaluation A: Good releasability from the adherend. Light peeling.
○: Releasability from the adherend is OK. Peeling is heavier than ◎.
Δ: Partial adhesion.
X: Adhesion.
XX: Full surface adhesion. The sheet is destroyed.
Claims (4)
Ｒ1 aＳｉＯ(4-a)/2 （１）
（式中、Ｒ1は置換もしくは非置換の炭素数１〜８の一価炭化水素基、ａは１．９５〜２．０５の正数である。）
で表される１分子中に少なくとも２個のケイ素原子に結合するアルケニル基を有するオルガノポリシロキサン： １００質量部、
（Ｂ）下記一般式（２）
Ｒ2 bＲ3 cＳｉ（ＯＲ4）4-b-c （２）
（式中、Ｒ2は炭素数６〜１５のアルキル基、Ｒ3は置換もしくは非置換の炭素数１〜８の一価炭化水素基、Ｒ4は炭素数１〜６のアルキル基、ｂは１〜３の整数、ｃは０〜２の整数、ｂ＋ｃは１〜３の整数である。）
で表されるアルコキシシラン： ０．１〜５質量部、
（Ｃ）ケイ素原子に結合した水素原子を１分子中に２個以上含有するオルガノハイドロジェンポリシロキサンと白金族系触媒からなる付加反応型硬化剤又は有機過酸化物：
硬化に必要な量
を含有する組成物を硬化してなるシリコーンゴムであり、高温高湿８５℃×８５％ＲＨの環境下で硬化シリコーンゴムが被着体に固着しないことを特徴とする固着防止シリコーンゴム。 (A) The following average composition formula (1)
R 1 a SiO (4-a) / 2 (1)
(In the formula, R 1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, and a is a positive number of 1.95 to 2.05.)
An organopolysiloxane having an alkenyl group bonded to at least two silicon atoms in one molecule represented by: 100 parts by mass
(B) The following general formula (2)
R 2 b R 3 c Si (OR 4 ) 4-bc (2)
(Wherein R 2 is an alkyl group having 6 to 15 carbon atoms, R 3 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, R 4 is an alkyl group having 1 to 6 carbon atoms, and b is An integer of 1 to 3, c is an integer of 0 to 2, and b + c is an integer of 1 to 3.)
Alkoxysilane represented by: 0.1 to 5 parts by mass,
(C) Addition reaction type curing agent or organic peroxide comprising an organohydrogenpolysiloxane containing two or more hydrogen atoms bonded to silicon atoms in one molecule and a platinum group catalyst :
A silicone rubber obtained by curing a composition containing an amount necessary for curing, wherein the cured silicone rubber does not adhere to an adherend in an environment of high temperature and high humidity of 85 ° C. and 85% RH. silicone rubber.
を含有する組成物であることを特徴とする請求項１に記載の固着防止シリコーンゴム。 Furthermore, as a component (D), the viscosity in 25 degreeC is 0.1-2 Pa.s, the phenyl group containing silicone oil which contains 3-50 mol% of phenyl groups: The composition containing 0.1-5 mass parts The sticking-preventing silicone rubber according to claim 1, which is a product.
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