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.

Abstract: A thermoplastic resin composition comprising (A) 5 to 95 parts by weight of an olefinic resin and (B) 95 to 5 parts by weight of an acrylonitrile-styrenic copolymer is improved in compatibility between the olefinic resin and the acrylonitrile-styrenic copolymer by modifying at least a part of the acrylonitrile-styrenic copolymer with an epoxy compound and by incorporating an effective amount of at least one compatibilizer selected from the group consisting of styrene-ethylene-butadiene-styrene block copolymers modified with unsaturated carboxylic acids or anhydrides thereof, unsaturated carboxylic acid-olefine copolymers, and polymers reactive with an epoxy group.

Abstract: A thermoplastic resin composition comprising (a) modified polyolefin produced by graft-polymerizing a polyolefin with a glycidyl compound represented by the following general formula: ##STR1## wherein R is a hydrogen atom or an alkyl group having 1-6 carbon atoms, Ar is an aromatic hydrocarbon group having 6-20 carbon atoms and containing at least one glycidyloxy group, and n is an integer of 1-4; and (b) a matrix polymer resin such as polyamide, polyester, polycarbonate etc.

Abstract: The modified polyolefin is produced by graft-polymerizing (a) 100 parts by weight of a polyolefin, with (b) 0.01-30 parts by weight of a glycidyl compound represented by the following general formula: ##STR1## wherein R is a hydrogen atom or an alkyl group having 1-6 carbon atoms, Ar is an aromatic hydrocarbon group having 6-20 carbon atoms and containing at least one glycidyloxy group, and n is an integer of 1-4. The glycidyl compound may be added stepwise to have a higher graft ratio. The modified polyolefin may be graft-copolymerized with polyesters at a high graft ratio.