Heat-foamable olefinic resin composition and process for production of olefinic resin foam from said composition
AssigneeSekisui Kagaku Kogyo Kabushiki Kaisha
InventorsMichio Matsumura, Takao Inoue, Toshihiro Arai
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Abstract
A heat-foamable olefinic resin composition comprising (a) an ethylenic polymer, (b) a propylene/alpha-olefin copolymer having a melting point of 130.degree. to 160.degree. C., (c) a propylene polymer having a melting point at least 10.degree. C. higher than the melting point of the propylene/alpha-olefin copolymer, and (d) a blowing agent, and optionally (e) a crosslinking agent and/or a crosslinking promoting agent; and a process for producing an olefinic resin foam comprising crosslinking and heat-foaming the aforesaid heat-foamable olefinic resin composition.
Claims22
A heat-foamable olefinic resin composition comprising
- (a) an ethylene polymer selected from the group consisting of polyethylene and a copolymer derived from ethylene as a major component and at least one other ethylenically unsaturated monomer,
- (b) a propylene/alpha-olefin copolymer having a melting point of 130.degree. to 160.degree. C.,
- (c) a propylene polymer selected from the group consisting of polypropylene and a copolymer derived from propylene as the major component and at least one other ethylenically unsaturated monomer, having a melting point at least 10.degree. C. higher than the melting point of the propylene/alpha-olefin copolymer, and
- (d) a blowing agent, and optionally
- (e) a crosslinking agent and/or a crosslinking promoting agent.
Dependencies are inferred from the claim text.