Integrally molded article of silicone rubber and modified polypr

Details Integrally molded article of silicone rubber and modified polypr Integrally molded article of silicone rubber and modified polypr

1993-12-09

1995-05-23

Nakarani, D. S.

Stock material or miscellaneous articles

Composite

Of silicon containing

428447, B32B 704, B32B 2520, B32B 2732

Patent

active

054180651

ABSTRACT:
In a polypropylene resin/silicone rubber integrally molded article, a polypropylene resin having an aliphatic unsaturated bond is integrally joined to an addition type silicone rubber at high bond strength. It is prepared by injection molding a modified polypropylene 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 polypropylene resin. Stronger bond is established when the silicone rubber contains a tackifier in the form of a compound containing in a molecule at least one hydrogen atom directly attached to a silicon atom and an alkoxysilyl, glycidyl or acid anhydride group or a --(CH.sub.2).sub.n -- linkage.

REFERENCES:
patent: 4257936 (1981-03-01), Matsumoto et al.
patent: 4814231 (1989-03-01), Onohara et al.

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