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US 2012/0232219 A1Published application
Addition curable self-adhesive silicone rubber composition
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsNobu KATO, Noriyuki Meguriya
Life of this patent
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Abstract
An addition curable self-adhesive silicone rubber composition comprising (A) an organopolysiloxane containing at least two alkenyl groups, (B) an organohydrogenpolysiloxane containing at least three SiH groups, (C) another organohydrogenpolysiloxane containing no other reactive groups than SiH groups, and (F) an addition reaction catalyst, with a SiH/alkenyl molar ratio ranging from 0.8 to 5.0, is briefly moldable and cures to various metals and organic resins.
Claims7
An addition curable self-adhesive silicone rubber composition comprising
- (A) 100 parts by weight of an organopolysiloxane containing at least two silicon-bonded alkenyl groups in a molecule,
- (B) 0.2 to 30 parts by weight of an organohydrogenpolysiloxane containing at least three silicon-bonded hydrogen atoms in a molecule, having the general formula (1):
- wherein R1 is each independently an unsubstituted or halo or cyano-substituted monovalent hydrocarbon group of 1 to 5 carbon atoms, R2 is R1 or hydrogen, R3 is R1 or an aromatic ring-containing monovalent organic group of 6 to 10 carbon atoms, X is a single bond or a divalent organic group of 1 to 5 carbon atoms, A is an aromatic ring-containing monovalent organic group of 6 to 10 carbon atoms, B is a monovalent reactive organic group of 3 to 9 carbon atoms, n is a positive number of 3 to 150, m is a positive number of 1 to 30, p is a positive number of 1 to 30, q is a number of 0 to 100, and the sum of n+m+p+q is 10 to 200,
- (C) 0 to 30 parts by weight of an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms in a molecule and no reactive groups other than the SiH groups, and
- (F) a catalytic amount of an addition reaction catalyst,
- a molar ratio of total SiH functional groups in components (B) and (C) to alkenyl groups in component (A) being in a range of from 0.8 to 5.0.
3 more elements
Dependencies are inferred from the claim text.