JPH055064A - Silicone rubber composition for gasket - Google Patents
Silicone rubber composition for gasketInfo
- Publication number
- JPH055064A JPH055064A JP3183123A JP18312391A JPH055064A JP H055064 A JPH055064 A JP H055064A JP 3183123 A JP3183123 A JP 3183123A JP 18312391 A JP18312391 A JP 18312391A JP H055064 A JPH055064 A JP H055064A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- silicone rubber
- component
- rubber composition
- gasket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 42
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 title claims abstract description 38
- 239000003921 oil Substances 0.000 claims abstract description 44
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 18
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 16
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 16
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 15
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 14
- 239000010687 lubricating oil Substances 0.000 claims abstract description 14
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 12
- 125000003342 alkenyl group Chemical group 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 8
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims abstract description 8
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 8
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 8
- 229920006136 organohydrogenpolysiloxane Polymers 0.000 claims abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 229910052710 silicon Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 18
- 239000002480 mineral oil Substances 0.000 claims description 16
- 235000010446 mineral oil Nutrition 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 4
- 238000007259 addition reaction Methods 0.000 abstract description 3
- -1 3,3,3-trifluoropropyl group Chemical group 0.000 description 25
- 238000012360 testing method Methods 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 9
- 238000012856 packing Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000010705 motor oil Substances 0.000 description 6
- 230000008961 swelling Effects 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000010734 process oil Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000002199 base oil Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910021485 fumed silica Inorganic materials 0.000 description 2
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 125000000962 organic group Chemical group 0.000 description 2
- 229920001843 polymethylhydrosiloxane Polymers 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000012763 reinforcing filler Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 125000000547 substituted alkyl group Chemical group 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- BITPLIXHRASDQB-UHFFFAOYSA-N ethenyl-[ethenyl(dimethyl)silyl]oxy-dimethylsilane Chemical compound C=C[Si](C)(C)O[Si](C)(C)C=C BITPLIXHRASDQB-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010068 moulding (rubber) Methods 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
- 150000001282 organosilanes Chemical class 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 238000013031 physical testing Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 150000003058 platinum compounds Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
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)
- Sealing Material Composition (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はエンジンオイル等の鉱物
油をベースとする潤滑油に常時接触して使用されるガス
ケット用シリコーンゴム組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silicone rubber composition for gaskets which is used in constant contact with a lubricating oil based on a mineral oil such as engine oil.
【０００２】[0002]
【従来の技術】シリコーンゴム成形体は優れた耐熱性、
耐寒性、低圧縮永久歪性を有するため自動車，車輌，船
舶，飛行機等のロッカーカバーガスケット，オイルパン
パッキン，ヘッドカバーパッキン，シリンダーライナー
パッキン，バルブステムシール，オイルフィルター・シ
ールリング，シャフトシール等のガスケット用途に用い
られている。2. Description of the Related Art Silicone rubber moldings have excellent heat resistance,
Because it has cold resistance and low compression set, it is a gasket for rocker cover gaskets for automobiles, vehicles, ships, airplanes, oil pan packings, head cover packings, cylinder liner packings, valve stem seals, oil filter seal rings, shaft seals, etc. It is used for purposes.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来のシリコ
ーンゴム成形体はエンジンオイル等の鉱物油をベースと
する潤滑油と常時接触すると、膨潤してガスケットとし
ての機能が低下し、長時間使用しているとシリコーンゴ
ム成形体に亀裂が発生する等の欠点があった。このよう
な欠点を改良する方法としてはシリコーンゴムに３,３,
３−トリフロロプロピル基を導入する方法が知られてい
るが、この方法で得られたシリコーンゴムはコストが高
く、限られた用途にしか使用できないという問題点があ
った。なお、シリコーン油を含有するシリコーンゴム
は、コネクタ用パッキン用や無潤滑運動用シール用とし
て公知であり（特開昭５５−１３５１８６，特開昭５５
−１４４０７８）、ガスケット用として公知である（特
開昭５８−２２５１５２）が、鉱物油をベースとする潤
滑油に常時接触するガスケット用としては公知でない。
そこで、本発明者らは上記問題点を解消すべく研究した
結果、付加反応硬化型シリコーンゴム組成物に特定のオ
ルガノポリシロキサン油または特定の炭化水素油を添加
配合してなるシリコーンゴム組成物は、その硬化物がエ
ンジンオイル等の鉱物油をベースとする潤滑油に常時接
触しても膨潤の度合が小さくなり、ガスケットとしての
機能性、耐久性が飛躍的に向上することを確認し、本発
明に到達した。すなわち、本発明の目的はエンジンオイ
ル等の鉱物油をベースとする潤滑油と接触しても膨潤の
度合が小さく、耐久性に優れたガスケットになり得るシ
リコーンゴム組成物を提供することにある。However, when a conventional silicone rubber molded product is constantly in contact with a lubricating oil based on a mineral oil such as engine oil, the conventional silicone rubber molded product swells and its function as a gasket is deteriorated. However, there is a defect that the silicone rubber molded body is cracked. As a method of improving such a defect, silicone rubber
A method of introducing a 3-trifluoropropyl group is known, but the silicone rubber obtained by this method has a problem that the cost is high and the silicone rubber can be used only for a limited purpose. Silicone rubber containing silicone oil is known as a packing for connectors and a seal for unlubricated motion (Japanese Patent Laid-Open No. 135-18686, Japanese Patent Laid-open No. 55-135186).
No. 144078), which is known as a gasket (JP-A-58-225152), but not known as a gasket which is in constant contact with a lubricating oil based on mineral oil.
Therefore, as a result of studies conducted by the present inventors to solve the above problems, a silicone rubber composition obtained by adding and blending a specific organopolysiloxane oil or a specific hydrocarbon oil to an addition reaction curable silicone rubber composition It was confirmed that the degree of swelling of the cured product was reduced even when it was in constant contact with a lubricating oil based on mineral oil such as engine oil, and the functionality and durability of the gasket were dramatically improved. The invention has been reached. That is, it is an object of the present invention to provide a silicone rubber composition which has a small degree of swelling even when it comes into contact with a lubricating oil based on a mineral oil such as an engine oil and which can be a gasket having excellent durability.
【０００４】[0004]
【課題を解決するための手段およびその作用】上記目的
は、 (Ａ)１分子中に少なくとも２個の珪素原子結合アルケニ
ル基を有するオルガノポリシロキサン
１００重量部、 (Ｂ)１分子中に少なくとも２個の珪素原子結合水素原子
を有するオルガノハイドロジェンポリシロキサン 本成分中の珪素原子結合水素原子のモル数と(Ａ)成分中
の珪素原子結合アルケニル基のモル数の比が（０.５：
１）〜（２０：１）となるような量、(Ｃ)白金系触媒 (Ａ)成分と(Ｂ)成分の合計量１００万重量部に対して白
金金属として０.１〜５００重量部、および (Ｄ)分子中に脂肪族不飽和結合および珪素原子結合水素
原子を有しないオルガノポリシロキサン油または脂肪族
不飽和結合を有しない炭化水素油１〜８０重量部 からなることを特徴とする、鉱物油をベースとする潤滑
油に常時接触して使用されるガスケット用シリコーンゴ
ム組成物によって達成される。MEANS FOR SOLVING THE PROBLEMS AND ACTION THEREOF The above objects (A) Organopolysiloxane having at least two silicon-bonded alkenyl groups in one molecule.
100 parts by weight, (B) Organohydrogenpolysiloxane having at least two silicon atom-bonded hydrogen atoms in one molecule, and the number of moles of silicon atom-bonded hydrogen atoms in the component and the silicon atom-bonded alkenyl in the component (A). The molar ratio of the groups is (0.5:
1) to (20: 1), 0.1 to 500 parts by weight of platinum metal per 1 million parts by weight of the total amount of the (C) platinum-based catalyst (A) component and (B) component, And (D) 1 to 80 parts by weight of an organopolysiloxane oil having no aliphatic unsaturated bond and no silicon atom-bonded hydrogen atom in the molecule or a hydrocarbon oil having no aliphatic unsaturated bond. It is achieved by a silicone rubber composition for gaskets which is used in constant contact with a lubricating oil based on mineral oil.
【０００６】これを説明すると、本発明に使用される
(Ａ)成分のオルガノポリシロキサンは本発明組成物の主
成分であり、これは、１分子中に少なくとも２個の珪素
原子結合アルケニル基を有することが必要である。この
ようなアルケニル基としては、ビニル基，アリル基，プ
ロペニル基等が例示される。アルケニル基以外の有機基
としては、メチル基，エチル基，プロピル基で例示され
るアルキル基；フェニル基，トリル基で例示されるアリ
−ル基；３,３,３−トリフロロプロピル基，３−クロロ
プロピル基で例示される置換アルキル基等が挙げられ
る。(Ａ)成分の分子構造は直鎖状、分岐を含む直鎖状の
いずれであっても良い。(Ａ)成分の分子量は特に限定は
なく、粘度の低い液状のものから粘度の高い生ゴム状の
ものまで使用できるが、硬化してゴム状弾性体になるた
めには２５℃における粘度が１００センチポイズ以上で
あることが好ましい。Explaining this, it is used in the present invention.
The organopolysiloxane as the component (A) is the main component of the composition of the present invention, and it is necessary that it has at least two silicon-bonded alkenyl groups in one molecule. Examples of such an alkenyl group include a vinyl group, an allyl group, a propenyl group and the like. Organic groups other than alkenyl groups include alkyl groups exemplified by methyl group, ethyl group and propyl group; aryl groups exemplified by phenyl group and tolyl group; 3,3,3-trifluoropropyl group, 3 Examples include a substituted alkyl group exemplified by a -chloropropyl group. The molecular structure of the component (A) may be linear or linear including branched. The molecular weight of the component (A) is not particularly limited, and it can be used from a liquid having a low viscosity to a raw rubber having a high viscosity, but the viscosity at 25 ° C. is 100 centipoise to cure into a rubber-like elastic body. The above is preferable.
【０００７】本発明に使用される(Ｂ)成分のオルガノハ
イドロジェンポリシロキサンは(Ａ)成分の架橋剤であ
り、(Ｃ)成分の白金系触媒の存在下に、(Ｂ)成分の珪素
原子結合水素原子が、(Ａ)成分の珪素原子結合アルケニ
ル基に付加反応し、その結果、架橋し硬化に至るもので
ある。(Ｂ)成分のオルガノハイドロジェンポリシロキサ
ンは１分子中に少なくとも２個の珪素原子結合水素原子
を有することが必要である。珪素原子結合水素原子以外
の有機基としてはメチル基，エチル基，プロピル基で例
示されるアルキル基；フェニル基，トリル基で例示され
るアリ−ル基；３,３,３−トリフロロプロピル基，３−
クロロプロピル基で例示される置換アルキル基等が挙げ
られる。(Ｂ)成分の分子構造は、直鎖状、分岐を含む直
鎖状、環状、網目状のいずれでも良い。(Ｂ)成分の分子
量は特に限定はないが、２５℃における粘度が３〜１０
０００センチポイズの範囲であることが好ましい。ま
た、(Ｂ)成分の配合量は、本成分中の珪素原子結合水素
原子のモル数と(Ａ)成分中の珪素原子結合アルケニル基
のモル数の比が（０.５:１）〜（２０:１)となるような
量であり、好ましくは（１：１）〜（３：１）の範囲で
ある。これは(Ａ)成分中の珪素原子結合アルケニル基の
モル数１に対して本成分中の珪素原子結合水素原子のモ
ル数が ０.５より小さいと充分に硬化することができ
ず、２０より大きいと発泡することがあるからである。The organohydrogenpolysiloxane of the component (B) used in the present invention is a cross-linking agent of the component (A), and in the presence of the platinum catalyst of the component (C), the silicon atom of the component (B) is used. The bonded hydrogen atom undergoes an addition reaction with the silicon atom-bonded alkenyl group of the component (A), resulting in crosslinking and curing. The organohydrogenpolysiloxane as the component (B) must have at least two silicon-bonded hydrogen atoms in one molecule. As the organic group other than the silicon atom-bonded hydrogen atom, an alkyl group exemplified by a methyl group, an ethyl group and a propyl group; an aryl group exemplified by a phenyl group and a tolyl group; a 3,3,3-trifluoropropyl group , 3-
Examples thereof include a substituted alkyl group exemplified by a chloropropyl group. The molecular structure of the component (B) may be linear, linear including branched, cyclic or network. The molecular weight of the component (B) is not particularly limited, but the viscosity at 25 ° C. is 3 to 10
It is preferably in the range of 000 centipoise. Further, the blending amount of the component (B) is such that the ratio of the number of moles of silicon atom-bonded hydrogen atoms in this component to the number of moles of silicon atom-bonded alkenyl groups in the component (A) is (0.5: 1) to ( 20: 1), preferably in the range of (1: 1) to (3: 1). When the number of moles of silicon atom-bonded hydrogen atoms in this component is less than 0.5 with respect to the number of moles of silicon atom-bonded alkenyl groups in the component (A), the curing cannot be sufficiently performed. This is because if it is large, foaming may occur.
【０００８】本発明に使用される(Ｃ)成分の白金系触媒
は(Ａ)成分と(Ｂ)成分を架橋して硬化させるための触媒
である。(Ｃ)成分の白金系触媒としては、白金黒、塩化
白金酸，塩化白金酸のアルコ−ル溶液，塩化白金酸とオ
レフィン類との錯化合物，塩化白金酸とアルケニルシロ
キサンとの錯化合物，これらの白金または白金化合物触
媒を含有する熱可塑性樹脂微粒子触媒が挙げられる。
(Ｃ)成分の添加量は(Ａ)成分と(Ｂ)成分の合計量１００
万重量部に対して白金金属として ０.１〜５００重量部
であり、好ましくは１〜５０重量部である。これは０.
１重量部未満では硬化が充分に進行せず、５００重量部
を超えると不経済であるためである。The platinum-based catalyst of the component (C) used in the present invention is a catalyst for crosslinking and curing the components (A) and (B). Examples of the platinum-based catalyst of the component (C) include platinum black, chloroplatinic acid, an alcohol solution of chloroplatinic acid, a complex compound of chloroplatinic acid and olefins, a complex compound of chloroplatinic acid and alkenylsiloxanes, and the like. Examples of the thermoplastic resin fine particle catalyst containing the platinum or the platinum compound catalyst described above.
Component (C) is added in a total amount of component (A) and component (B) of 100
The platinum metal content is 0.1 to 500 parts by weight, preferably 1 to 50 parts by weight, based on 10,000 parts by weight. This is 0.
This is because if it is less than 1 part by weight, the curing does not proceed sufficiently, and if it exceeds 500 parts by weight, it is uneconomical.
【０００９】本発明に使用される(Ｄ)成分の分子中に脂
肪族不飽和結合および珪素原子結合水素原子を有しない
オルガノポリシロキサン油または脂肪族不飽和結合を有
しない炭化水素油は、本発明の特徴をなす成分であり、
鉱物油をベースとする潤滑油との接触時にシリコーンゴ
ムの膨潤を抑える役目を果たす。かかるポリオルガノシ
ロキサン油の代表例は、平均単位式The organopolysiloxane oil having no aliphatic unsaturated bond and silicon atom-bonded hydrogen atom in the molecule of the component (D) used in the present invention or the hydrocarbon oil having no aliphatic unsaturated bond is It is a component that characterizes the invention,
It serves to suppress the swelling of the silicone rubber upon contact with a lubricating oil based on mineral oil. A typical example of such polyorganosiloxane oil is the average unit formula
【化１】 で示されるものである。式中、Ｒ1およびＲ2は脂肪族不
飽和結合を有しない非置換もしくは置換の一価の炭化水
素基であり、これにはメチル基，エチル基，プロピル
基，オクチル基，フェニル基，３,３,３−トリフロロプ
ロピル基等が例示される。ａは０≦ａ≦３，ｂは０≦ｂ
≦３，ａ＋ｂは平均１.９５〜２.０５である。このオル
ガノポリシロキサン油の粘度は特に制限されないが、シ
リコーンゴム組成物の安定性や鉱物油をベースとする潤
滑油に対する膨潤度を考慮した場合、１〜２００,００
０センチポイズであることが好ましい。これらは通常シ
リコーンオイルと称されるものであり、両末端トリメチ
ルシロキシ基封鎖のジメチルポリシロキサン，両末端ト
リメチルシロキシ基封鎖のメチルオクチルポリシロキサ
ン，両末端トリメチルシロキシ基封鎖のメチルフェニル
ポリシロキサン，両末端トリメチルシロキシ基封鎖の
３,３,３−トリフルオロプロピル（メチル）ポリシロキ
サン等が挙げられるが、これらのシロキサン単位を有す
る共重合体でもよい。また、２種以上のオルガノポリシ
ロキサン油を混合して使用してもよい。経済性、成形後
の安定性等の点から、ジメチルポリシロキサン油が最も
好ましい。もう一つの(Ｄ)成分である炭化水素油は、常
温で液状の炭素と水素の化合物であり、その分子構造か
らパラフィン系炭化水素油；ナフテン系炭化水素油，芳
香族炭化水素油等があり、脂肪族不飽和結合を有しない
炭化水素油であればその種類は特に制限はないが、シリ
コーンゴム組成物の安定性や鉱物油をベースとする潤滑
油に対する膨潤度を考慮した場合２５℃における粘度が
１〜２００,０００センチポイズであることが好まし
い。かかる炭化水素油は、例えば、プロセスオイルと呼
称され市販されている。また２種以上の炭化水素油を混
合して使用してもよい。 (Ｄ)成分はオルガノポリシロキサン油、炭化水素油それ
ぞれ単独で使用しても併用でもかまわないが、その合計
量は(Ａ)成分１００重量部に対して１〜８０重量部であ
り、好ましくは５〜５０重量部の範囲である。そして全
組成物中の(Ｄ)成分の含有量としては２〜３０重量％の
範囲が好ましい。[Chemical 1] Is indicated by. In the formula, R 1 and R 2 are an unsubstituted or substituted monovalent hydrocarbon group having no aliphatic unsaturated bond, which includes a methyl group, an ethyl group, a propyl group, an octyl group, a phenyl group, 3 Examples include a 3,3,3-trifluoropropyl group and the like. a is 0 ≦ a ≦ 3, b is 0 ≦ b
≦ 3, a + b is 1.95 to 2.05 on average. The viscosity of the organopolysiloxane oil is not particularly limited, but in consideration of the stability of the silicone rubber composition and the degree of swelling with respect to a mineral oil-based lubricating oil, it is 1 to 200,000.
It is preferably 0 centipoise. These are usually called silicone oils. Both ends trimethylsiloxy group blocked dimethylpolysiloxane, both ends trimethylsiloxy group blocked methyloctylpolysiloxane, both ends trimethylsiloxy group blocked methylphenylpolysiloxane, both ends Examples include trimethylsiloxy group-blocked 3,3,3-trifluoropropyl (methyl) polysiloxane and the like, but copolymers having these siloxane units may also be used. Further, two or more kinds of organopolysiloxane oils may be mixed and used. Dimethylpolysiloxane oil is most preferable from the viewpoints of economical efficiency and stability after molding. The other component (D), hydrocarbon oil, is a compound of carbon and hydrogen that is liquid at room temperature, and its molecular structure includes paraffin hydrocarbon oil; naphthene hydrocarbon oil, aromatic hydrocarbon oil, etc. The type of the hydrocarbon oil is not particularly limited as long as it is a hydrocarbon oil having no aliphatic unsaturated bond, but in consideration of the stability of the silicone rubber composition and the degree of swelling with respect to a mineral oil-based lubricating oil, at 25 ° C. The viscosity is preferably 1 to 200,000 centipoise. Such hydrocarbon oil is called, for example, process oil and is commercially available. Further, two or more kinds of hydrocarbon oils may be mixed and used. The component (D) may be used alone or in combination with the organopolysiloxane oil and the hydrocarbon oil, but the total amount thereof is 1 to 80 parts by weight, preferably 100 parts by weight of the component (A), and preferably It is in the range of 5 to 50 parts by weight. The content of the component (D) in the whole composition is preferably in the range of 2 to 30% by weight.
【００１０】本発明のシリコーンゴム組成物は、上記
(Ａ)成分〜(Ｄ)成分からなるものであるが、これには流
動性を調節したり、成形品の機械的強度を向上させるた
めに従来のシリコーンゴム組成物に添加配合することが
周知とされる各種の添加剤、例えば、沈澱シリカ，ヒュ
−ムドシリカ，焼成シリカ，ヒュ−ムド酸化チタン等の
補強性充填剤；粉砕石英，珪藻土，アルミノ珪酸，酸化
鉄，酸化亜鉛，炭酸カルシウム等の非補強充填剤；これ
らの充填剤をオルガノシラン，オルガノシロキサンオリ
ゴマー等の有機珪素化合物で表面処理したものを添加配
合することは本発明の目的を損わない限り差し支えな
い。また、本発明のシリコーンゴム組成物はこれに硬化
反応を抑制するための添加剤としてアセチレン系化合
物，ヒドラジン類，トリアゾ−ル類，フォスフィン類，
メルカプタン類を微量または少量添加することは、本発
明の目的を損わない限り差し支えない。また必要に応じ
て顔料，耐熱剤，難燃剤，内部離型剤，可塑剤等を添加
配合してもよい。本発明のガスケット用シリコーンゴム
組成物は、上記(Ａ)成分〜(Ｄ)成分あるいはこれらに必
要に応じて各種添加剤を配合したものを２本ロ−ル，ニ
−ダ−ミキサ−などの公知の混練手段により均一に混合
することにより容易に製造することができる。以上のよ
うなシリコーンゴム組成物は、これを圧縮成形、射出成
形、トランスファー成形等の公知の成形方法を用いて、
５０〜２５０℃で数秒から数分間加熱することにより、
シリコーンゴム製ガスケットとして成形される。これら
のガスケットとしては自動車，車輌，船舶，飛行機等、
特に自動車のロッカーカバーガスケット，オイルパンパ
ッキン，ヘッドカバーパッキン，シリンダーライナーパ
ッキン，バルブステムシール，オイルフィルター・シー
ルリング，シャフトシール等が挙げられる。これらのガ
スケットは、鉱物油をベースとする潤滑油と常時接触し
て使用される。自動車等に使用される潤滑油は通常鉱物
油を主剤としており、各種添加剤を含有している。The silicone rubber composition of the present invention has the above
It is composed of components (A) to (D), and it is well known that it is added to a conventional silicone rubber composition in order to adjust the fluidity and improve the mechanical strength of the molded product. Reinforcing fillers such as precipitated silica, fumed silica, calcined silica, fumed titanium oxide, etc .; ground quartz, diatomaceous earth, aluminosilicic acid, iron oxide, zinc oxide, calcium carbonate, etc. Non-reinforcing fillers: Addition of these fillers surface-treated with an organosilicon compound such as organosilane or organosiloxane oligomer may be added and blended unless the object of the present invention is impaired. In addition, the silicone rubber composition of the present invention has an acetylene compound, a hydrazine, a triazole, a phosphine, as an additive for suppressing the curing reaction.
Addition of a trace amount or a small amount of mercaptans may be carried out without impairing the object of the present invention. If necessary, pigments, heat-resistant agents, flame retardants, internal release agents, plasticizers, etc. may be added and blended. The silicone rubber composition for a gasket of the present invention comprises two components such as the above components (A) to (D) or a mixture of these components with various additives as required, such as a two-roll roll, a kneader mixer, etc. It can be easily produced by uniform mixing by a known kneading means. The silicone rubber composition as described above is produced by using a known molding method such as compression molding, injection molding or transfer molding,
By heating at 50 to 250 ° C for several seconds to several minutes,
Molded as a silicone rubber gasket. These gaskets include automobiles, vehicles, ships, airplanes, etc.
In particular, automotive rocker cover gaskets, oil pan packings, head cover packings, cylinder liner packings, valve stem seals, oil filter seal rings, shaft seals, etc. These gaskets are used in constant contact with a lubricating oil based on mineral oil. Lubricating oils used in automobiles and the like are usually composed mainly of mineral oil and contain various additives.
【００１１】[0011]
【実施例】次に実施例を挙げて本発明を説明する。実施
例中、部とあるのは重量部のことである。シリコーンゴ
ムの物性の測定とシリコーンゴムの耐油性の試験はJIS
K6301加硫ゴムの物理試験方法に規定された方法で行っ
た。また耐油性試験に使用した鉱物油はJIS K 6301の耐
油性試験に規定する試験用油No.3であった。EXAMPLES Next, the present invention will be described with reference to examples. In the examples, "parts" means "parts by weight". JIS measures the physical properties of silicone rubber and tests the oil resistance of silicone rubber.
K6301 The vulcanized rubber was tested by the method specified in Physical Testing Method. The mineral oil used for the oil resistance test was the test oil No. 3 specified in the oil resistance test of JIS K 6301.
【００１２】[0012]
【実施例１】分子鎖両末端がジメチルビニルシロキシ基
で封鎖された２５℃における粘度が２,０００センチポ
イズのジメチルポリシロキサン（ビニル基含有量０.２
３重量％）１００重量部に、比表面積２００m2／ｇのヒ
ュームドシリカ４０部と石英粉末２０部、シリカの表面
処理剤としてヘキサメチルジシラザン８部と水２部を加
えて均一になるまで混合し、更に真空下で１７０℃、２
時間の条件下で加熱処理してベースコンパウンドを作成
した。これに分子鎖両末端がトリメチルシロキシ基で封
鎖されたジメチルシロキサン・メチルハイドロジェンシ
ロキサン共重合体（珪素原子結合水素原子含有量０.７
重量％）２.４重量部、塩化白金酸とテトラメチルジビ
ニルジシロキサンとの錯体を白金金属として １０ppm、
分子鎖両末端がトリメチルシロキシ基で封鎖された２５
℃において粘度が５０センチポイズのジメチルポリシロ
キサン２５重量部を均一に混合し、２５℃においてせん
断速度１０sec-1で粘度が４,０００ポイズである液状の
シリコーンゴム組成物（試料NO.1）を得た。このシリコ
ーンゴム組成物を射出成形機を用いて、温度１２０℃で
１分間の条件下で、自動車用ロッカーカバーガスケット
の形状に成形した。得られた自動車用ロッカーカバーガ
スケットの実装試験を行うため、このガスケットを試験
用エンジンに組み込み、鉱物油をベース油とするエンジ
ンオイルを循環させながら４００時間連続運転させた
後、エアーを媒体とした耐圧シール性試験を行った。こ
の耐圧シール試験結果を表１に示した。また１２０℃で
１分間の条件でJIS K 6301に規定される物性測定用ゴム
シート（試験片）を作成し初期物性を測定した。またこ
の試験片をJIS K 6301に規定される試験用油No.3の中に
１５０℃で７０時間浸せきした後の物性を測定した。こ
れらの測定結果を耐油性試験結果として表２に示した。
また比較のため上記において、ジメチルポリシロキサン
を添加しなかった以外は上記と同様にしてシリコーンゴ
ム組成物（試料NO.2）を製造した。この組成物から上記
と同様に自動車用ロッカーカバーガスケットおよび物性
測定用シートを成形し、上記と同様な試験を行った。こ
れらの測定結果を表１，表２に併記した。Example 1 A dimethylpolysiloxane having a viscosity of 2,000 centipoise at 25 ° C. in which both ends of the molecular chain were blocked with dimethylvinylsiloxy groups (vinyl group content 0.2
3 parts by weight) 100 parts by weight, 40 parts of fumed silica having a specific surface area of 200 m 2 / g and 20 parts of quartz powder, 8 parts of hexamethyldisilazane as a silica surface treating agent and 2 parts of water are added until uniform. Mix and further under vacuum at 170 ° C for 2
The base compound was prepared by heat treatment under the condition of time. A dimethylsiloxane-methylhydrogensiloxane copolymer in which both ends of the molecular chain were blocked with trimethylsiloxy groups (silicon atom-bonded hydrogen atom content 0.7
2.4% by weight, a complex of chloroplatinic acid and tetramethyldivinyldisiloxane as platinum metal of 10 ppm,
Both ends of the molecular chain were blocked with trimethylsiloxy groups 25
Twenty-five parts by weight of dimethylpolysiloxane having a viscosity of 50 centipoise at ℃ was uniformly mixed to obtain a liquid silicone rubber composition (sample No. 1) having a viscosity of 4,000 poise at a shear rate of 10 sec -1 at 25 ℃. It was This silicone rubber composition was molded into an automobile rocker cover gasket shape using an injection molding machine at a temperature of 120 ° C. for 1 minute. In order to carry out a mounting test of the obtained automobile rocker cover gasket, this gasket was incorporated into a test engine, and after continuously operating for 400 hours while circulating engine oil containing mineral oil as a base oil, air was used as a medium. A pressure resistance sealability test was conducted. The results of this pressure-proof sealing test are shown in Table 1. Further, a rubber sheet (test piece) for measuring physical properties specified in JIS K 6301 was prepared under the condition of 120 ° C. for 1 minute, and initial physical properties were measured. Further, the physical properties of this test piece after immersion in test oil No. 3 specified in JIS K 6301 at 150 ° C. for 70 hours were measured. The results of these measurements are shown in Table 2 as the results of the oil resistance test.
For comparison, a silicone rubber composition (Sample No. 2) was produced in the same manner as above except that dimethylpolysiloxane was not added. An automobile rocker cover gasket and a sheet for measuring physical properties were molded from this composition in the same manner as above, and the same test as above was performed. The measurement results are also shown in Tables 1 and 2.
【表１】 [Table 1]
【表２】 [Table 2]
【００１３】[0013]
【実施例２】ジメチルシロキサン単位９９.８２モル
％，メチルビニルシロキサン単位０.１８モル％からな
り、分子鎖両末端がトリメチルシロキシ基で封鎖された
平均重合度 ７,０００のジメチルシロキサン・メチルビ
ニルシロキサン共重合体１００部、ジメチルジクロルシ
ランで表面処理された比表面積２００m2／ｇの乾式法シ
リカ３０重量部、珪藻土５０重量部、分子鎖両末端がト
リメチルシロキシ基で封鎖され、ジメチルシロキサン単
位２５モル％とメチルフェニルシロキサン単位７５モル
％とからなり、２５℃において粘度が１３０センチポイ
ズのメチルフェニルポリシロキサン２０重量部を均一に
混合し、１７０℃、２時間の条件下で加熱処理してベー
スコンパウンドを作成した。これに分子鎖両末端がトリ
メチルシロキシ基で封鎖されたジメチルシロキサン・メ
チルハイドロジェンシロキサン共重合体（珪素原子結合
水素原子含有量０.７重量％）１.２重量部と、塩化白金
酸を白金金属として ２０ppmを加え均一に混合してシリ
コーンゴム組成物（試料NO.3）を得た。このシリコーン
ゴム組成物を温度１５０℃、圧力２０kg／cm2 、加熱時
間５分間の条件下で圧縮成型して実施例１と同じ形状の
自動車用ロッカーカバーガスケットおよび物性測定用ゴ
ムシートを成形した。これらの成形品について実施例１
と同様の試験を行った。これらの結果を表３，表４に示
した。比較例のため上記においてメチルフェニルポリシ
ロキサンを添加しなかった以外は上記と同様にしてシリ
コーンゴム組成物（試料NO.4）を製造した。この組成物
から上記と同様にしてロッカーカバーガスケットおよび
物性測定用シートを成形し、上記と同様な試験を行っ
た。これらの結果を表３，表４に併記した。Example 2 Dimethylsiloxane / methylvinyl having 99.82 mol% of dimethylsiloxane units and 0.18 mol% of methylvinylsiloxane units and having both ends of the molecular chain blocked with trimethylsiloxy groups and an average degree of polymerization of 7,000. 100 parts of siloxane copolymer, 30 parts by weight of dry process silica surface-treated with dimethyldichlorosilane having a specific surface area of 200 m 2 / g, 50 parts by weight of diatomaceous earth, both ends of the molecular chain are blocked with trimethylsiloxy groups, and dimethylsiloxane unit 20 parts by weight of methylphenylpolysiloxane composed of 25 mol% and 75 mol% of methylphenylsiloxane units and having a viscosity of 130 centipoise at 25 ° C. is uniformly mixed, and heat-treated at 170 ° C. for 2 hours to form a base. Created a compound. 1.2 parts by weight of a dimethylsiloxane-methylhydrogensiloxane copolymer (0.7% by weight of silicon atom-bonded hydrogen atoms) in which both ends of the molecular chain were blocked with trimethylsiloxy groups, and chloroplatinic acid was added to platinum. 20 ppm of metal was added and mixed uniformly to obtain a silicone rubber composition (Sample No. 3). This silicone rubber composition was compression-molded under the conditions of a temperature of 150 ° C., a pressure of 20 kg / cm 2 , and a heating time of 5 minutes to form an automobile rocker cover gasket and a rubber sheet for measuring physical properties having the same shape as in Example 1. Example 1 for these molded products
The same test was performed. The results are shown in Tables 3 and 4. For comparison purposes, a silicone rubber composition (Sample No. 4) was produced in the same manner as above except that methylphenylpolysiloxane was not added. A rocker cover gasket and a sheet for measuring physical properties were molded from this composition in the same manner as above, and the same test as above was performed. These results are also shown in Tables 3 and 4.
【表３】 [Table 3]
【表４】 [Table 4]
【００１４】[0014]
【実施例３】実施例１において、２５℃における粘度が
５０センチポイズのジメチルポリシロキサンの代わりに
炭化水素油としてプロセスオイル［出光興産株式会社
製，商品名 プロセスオイル ＰＷ−３８０］１０重量部
を配合した以外は実施例１と同様にしてシリコーンゴム
組成物（試料NO.5）を得た。このシリコーンゴム組成物
からオイルフィルター・シールリングを成形した。ここ
で成形は射出成形機を用いて温度１２０℃／１分間の条
件下で射出成形した。得られたシールリングの実装試験
を行うため、このシールリングを自動車用オイルフィル
ターエレメントに組み込み、１５０℃の条件下で、鉱物
油をベース油とするエンジンオイルを循環させながら４
００時間連続運転させた後、エアーを媒体とした耐圧シ
ール性試験を行った。同時に１２０℃で１分間の条件で
実施例１と同じ形状の物性測定用ゴムシートを成形し、
実施例１と同様の試験を行った。これらの結果を表５，
表６に示した。また比較のため上記において、プロセス
オイルを添加しなかった以外は上記と同様にしてシリコ
ーンゴム組成物（試料NO.6）を製造した。この組成物か
ら上記と同様にしてオイルフィルター・シールリングお
よび物性測定用シートを成形し、上記と同様な試験を行
った。これらの結果を表５，表６に併記した。Example 3 In Example 1, 10 parts by weight of process oil [made by Idemitsu Kosan Co., Ltd., trade name Process Oil PW-380] was blended as hydrocarbon oil in place of dimethylpolysiloxane having a viscosity of 50 centipoise at 25 ° C. A silicone rubber composition (Sample No. 5) was obtained in the same manner as in Example 1 except for the above. An oil filter / sealing ring was molded from this silicone rubber composition. Here, the molding was performed by using an injection molding machine under the condition of a temperature of 120 ° C. for 1 minute. In order to carry out a mounting test of the obtained seal ring, this seal ring was incorporated into an oil filter element for automobiles, and engine oil containing mineral oil as a base oil was circulated under the condition of 150 ° C.
After continuous operation for 00 hours, a pressure resistant sealability test using air as a medium was performed. At the same time, a rubber sheet for measuring physical properties having the same shape as in Example 1 was molded under the conditions of 120 ° C. for 1 minute,
The same test as in Example 1 was performed. These results are shown in Table 5,
The results are shown in Table 6. For comparison, a silicone rubber composition (Sample No. 6) was produced in the same manner as above except that the process oil was not added. From this composition, an oil filter / sealing ring and a sheet for measuring physical properties were molded in the same manner as above, and the same test as above was conducted. The results are also shown in Tables 5 and 6.
【表５】 [Table 5]
【表６】 [Table 6]
【００１５】[0015]
【発明の効果】本発明のガスケット成形用シリコーンゴ
ム組成物は、(Ａ)成分〜(Ｄ)成分からなり、 特に(Ｄ)
成分の脂肪族不飽和結合および珪素原子結合水素原子を
有しないオルガノポリシロキサン油または脂肪族不飽和
結合を有しない炭化水素油を含有しているので鉱物油を
ベースとする潤滑油と常時接触しても膨潤の度合が小さ
く、耐久性に優れたガスケットになり得るという特徴を
有する。The gasket-forming silicone rubber composition of the present invention comprises components (A) to (D), particularly (D).
Since the component contains an organopolysiloxane oil having no aliphatic unsaturated bond and silicon atom-bonded hydrogen atom or a hydrocarbon oil having no aliphatic unsaturated bond, it is in constant contact with a lubricating oil based on a mineral oil. Even so, the degree of swelling is small, and the gasket has excellent durability.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 83:05 8319−4Ｊ 83:04） 8319−4Ｊ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location C08L 83:05 8319-4J 83:04) 8319-4J
Claims (1)
子結合アルケニル基を有するオルガノポリシロキサン
１００重量部、 (Ｂ)１分子中に少なくとも２個の珪素原子結合水素原子
を有するオルガノハイドロジェンポリシロキサン 本成分中の珪素原子結合水素原子のモル数と(Ａ)成分中
の珪素原子結合アルケニル基のモル数の比が（０.５：
１）〜（２０：１）となるような量、 (Ｃ)白金系触媒 (Ａ)成分と(Ｂ)成分の合計量１００万重量部に対して白
金金属として０.１〜５００重量部、 および (Ｄ)分子中に脂肪族不飽和結合および珪素原子結合水素
原子を有しないオルガノポリシロキサン油または脂肪族
不飽和結合を有しない炭化水素油 １〜８０重量部 からなることを特徴とする、鉱物油をベースとする潤滑
油に常時接触して使用されるガスケット用シリコーンゴ
ム組成物。 【請求項２】 (Ｄ)成分の２５℃における粘度が １〜
２００,０００センチポイズである請求項第１項記載の
シリコーンゴム組成物。 【請求項３】 (Ｄ)成分がジメチルポリシロキサン油で
ある請求項第２項記載のシリコーンゴム組成物。 【請求項４】 ガスケットが自動車用ロッカーカバーガ
スケットである請求項第１項記載のシリコーンゴム組成
物。 【請求項５】 ガスケットが自動車用オイルフィルター
・シールリングである請求項第１項記載のシリコーンゴ
ム組成物。Claims: (A) An organopolysiloxane having at least two silicon-bonded alkenyl groups in one molecule.
100 parts by weight, (B) Organohydrogenpolysiloxane having at least two silicon atom-bonded hydrogen atoms in one molecule, and the number of moles of silicon atom-bonded hydrogen atoms in this component and the silicon atom-bonded alkenyl in component (A). The molar ratio of the groups is (0.5:
1) to (20: 1), 0.1 to 500 parts by weight of platinum metal based on 1 million parts by weight of the total amount of the (C) platinum-based catalyst (A) component and (B) component, And (D) 1 to 80 parts by weight of an organopolysiloxane oil having no aliphatic unsaturated bond and no silicon atom-bonded hydrogen atom in the molecule or a hydrocarbon oil having no aliphatic unsaturated bond. A silicone rubber composition for a gasket, which is used in constant contact with a lubricating oil based on a mineral oil. 2. The viscosity of component (D) at 25 ° C. is from 1 to
The silicone rubber composition according to claim 1, which has a viscosity of 200,000 centipoise. 3. The silicone rubber composition according to claim 2, wherein the component (D) is dimethylpolysiloxane oil. 4. The silicone rubber composition according to claim 1, wherein the gasket is a rocker cover gasket for automobiles. 5. The silicone rubber composition according to claim 1, wherein the gasket is an oil filter / sealing ring for automobiles.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183123A JP2681554B2 (en) | 1991-06-27 | 1991-06-27 | Silicone rubber composition for gasket |
| CA 2071788 CA2071788A1 (en) | 1991-06-27 | 1992-06-22 | Silicone rubber composition for gaskets |
| MX9203393A MX9203393A (en) | 1991-06-27 | 1992-06-25 | SILICONE RUBBER COMPOSITION FOR JOINTS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183123A JP2681554B2 (en) | 1991-06-27 | 1991-06-27 | Silicone rubber composition for gasket |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23476196A Division JP2840939B2 (en) | 1996-08-16 | 1996-08-16 | Silicone rubber composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH055064A true JPH055064A (en) | 1993-01-14 |
| JP2681554B2 JP2681554B2 (en) | 1997-11-26 |
Family
ID=16130198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3183123A Expired - Fee Related JP2681554B2 (en) | 1991-06-27 | 1991-06-27 | Silicone rubber composition for gasket |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2681554B2 (en) |
| CA (1) | CA2071788A1 (en) |
| MX (1) | MX9203393A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011081223A1 (en) | 2009-12-29 | 2011-07-07 | Dow Corning Toray Co., Ltd. | Curable liquid silicone rubber composition for forming a sealing member and sealing member |
| WO2018092490A1 (en) * | 2016-11-17 | 2018-05-24 | 信越化学工業株式会社 | Addition-curable liquid silicone rubber composition for automobile oil filter sealing member, and automobile oil filter sealing member |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002294076A (en) * | 2001-04-02 | 2002-10-09 | Dow Corning Toray Silicone Co Ltd | Silicone gel composition for molding in metal mold |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587451A (en) * | 1981-07-07 | 1983-01-17 | Toshiba Silicone Co Ltd | Sealing composition |
| JPS58225152A (en) * | 1982-06-24 | 1983-12-27 | Toray Silicone Co Ltd | Curable organopolysiloxane composition |
| JPS62252457A (en) * | 1986-04-25 | 1987-11-04 | Toshiba Silicone Co Ltd | Silicone rubber composition |
-
1991
- 1991-06-27 JP JP3183123A patent/JP2681554B2/en not_active Expired - Fee Related
-
1992
- 1992-06-22 CA CA 2071788 patent/CA2071788A1/en not_active Abandoned
- 1992-06-25 MX MX9203393A patent/MX9203393A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587451A (en) * | 1981-07-07 | 1983-01-17 | Toshiba Silicone Co Ltd | Sealing composition |
| JPS58225152A (en) * | 1982-06-24 | 1983-12-27 | Toray Silicone Co Ltd | Curable organopolysiloxane composition |
| JPS62252457A (en) * | 1986-04-25 | 1987-11-04 | Toshiba Silicone Co Ltd | Silicone rubber composition |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011081223A1 (en) | 2009-12-29 | 2011-07-07 | Dow Corning Toray Co., Ltd. | Curable liquid silicone rubber composition for forming a sealing member and sealing member |
| US8999485B2 (en) | 2009-12-29 | 2015-04-07 | Dow Corning Toray Co., Ltd. | Curable liquid silicone rubber composition for forming a sealing member and sealing member |
| WO2018092490A1 (en) * | 2016-11-17 | 2018-05-24 | 信越化学工業株式会社 | Addition-curable liquid silicone rubber composition for automobile oil filter sealing member, and automobile oil filter sealing member |
| JPWO2018092490A1 (en) * | 2016-11-17 | 2019-06-24 | 信越化学工業株式会社 | Addition-curable liquid silicone rubber composition for automobile oil filter seal member and automobile oil filter seal member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2681554B2 (en) | 1997-11-26 |
| MX9203393A (en) | 1993-11-01 |
| CA2071788A1 (en) | 1992-12-28 |
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