Polycarbonate resin/silicone rubber integrally molded article and method for making
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsHironao Fujiki, Shigeki Shudo, Akira Matsuda, Noriyoshi Ogawa, Toshiaki Takata
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Abstract
In a polycarbonate resin/silicone rubber integrally molded article, a polycarbonate resin having an aliphatic unsaturated group, typically an isopropenyl group is integrally joined to an addition type silicone rubber containing a tackifier component at high bond strength. It is prepared by injection molding a modified polycarbonate resin into a preform, injection molding a silicone rubber composition over the preform, and curing the composition at a temperature below the softening point of the polycarbonate resin.
Claims31
A polycarbonate resin/silicone rubber integrally molded article wherein a polycarbonate resin having an aliphatic unsaturated group or a composition containing the same is integrally joined to an addition type silicone rubber containing a tackifier component.
A method for preparing polycarbonate resin/silicone rubber integrally molded article, comprising the steps of:
- molding a polycarbonate resin having an aliphatic unsaturated group or a composition containing the same into a preform,
- contacting an adhesive silicone rubber composition with a surface of the preform, said silicone rubber composition containing (a) an alkenyl group-containing organopolysiloxane, (b) an organohydrogenpolysiloxane having at least two hydrogen atoms each directly attached to a silicon atom in a molecule, (c) an addition reaction catalyst, and (d) a tackifier component,
- curing the silicone rubber composition at a temperature lower than the softening point of said polycarbonate resin or composition containing the same.
Dependencies are inferred from the claim text.