Abstract The silicone rubber adhesive of the present invention is composed of a particular organopolysiloxane, condensation reaction catalyst and organoperoxide in restricted blending ratios. As a result, a characteristic of the present invention is that various organic materials may be tightly and durably bonded to silicone rubbers by applying the adhesive of the present invention to the surface of a cured silcone rubber and laying on and then curing an organic material such as a synthetic rubber composition, for example, ethylene-propylene terpolymer rubber or chloroprene rubber, or a phenol resin, epoxy resin, etc. In addition, it is also a characteristic of the present invention that silicone rubber may be tightly bonded to various materials by applying the silicone rubber adhesive of the present invention to various organic materials as mentioned above, bringing a silicone rubber composition which contains a curing catalyst into contact and then curing.
An adhesive for silicone rubbers characterized as consisting of (A) 100 weight parts organopolysiloxane with the general formula where R 1 is an alkyl or aryl group, R 2 is an alkenyl gro-ip, R 3 is a hydrogen atom or alkyl group, a is 0.0 to 1.0 on average, b is 0.1 to 2.0 on average, c is 0.1 to 2.5 on average and a + b + c is 1 to 3 on average, (B) 0.01 to 200 weight parts condensation reaction catalyst and (C) 0.1 to 300 weight parts organoperoxide.
Claim 2
Dependent Claim
92 words
An adhesive for silicone rubbers characterized as consisting of (A) 100 weight parts organopolysiloxane with the general formula where R 1 is an alkyl or aryl group, R 2 is an alkenyl gro-ip, R 3 is a hydrogen atom or alkyl group, a is 0.0 to 1.0 on average, b is 0.1 to 2.0 on average, c is 0.1 to 2.5 on average and a + b + c is 1 to 3 on average, (B) 0.01 to 200 weight parts condensation reaction catalyst and (C) 0.1 to 300 weight parts organoperoxide.
Claim 3
Dependent Claim
24 words
Adhesive described in Claim 1 wherein the organopolysiloxane comprising component (A) is the compound produced by the condensation reaction of alkenyl group- containing alkoxysilane.
Claim 4
Dependent Claim
14 words
Adhesive described in Claim 1 wherein the condensation reaction catalyst is an organotitanium compound.
Claim 5
Dependent Claim
12 words
Adhesive described in Claim 1 wherein the organoperoxide is a dialkyl peroxide.
Claim 6
Dependent Claim
33 words
Adhesive described in Claim 1 wherein the organopolysiloxane comprising component (A) is the compound produced by the condensation reaction of vinyltrimethoxysilane, the condensation reaction catalyst (B) is tetra-(n-butyl)titanate, and the organoperoxide is 2,5-dimethyl-2,5-di(t-butylperoxy)hexane.
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