Molded sponge-like thermoplastic elastomer articles having thin,

Details Molded sponge-like thermoplastic elastomer articles having thin, Molded sponge-like thermoplastic elastomer articles having thin,

1981-02-20

1982-10-05

Anderson, Philip E.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264 26, 264 455, 264 54, 264DIG5, 521 51, B32B 520, B32B 2514, B29D 2700

Patent

active

043528546

ABSTRACT:
A molded object having a sponge-like interior surrounded by a skin, molding composition from which it is produced, and the method for producing the article. Copolymers of vinyl-substituted aromatic compounds containing from 8-18 carbon atoms copolymerized with conjugated diene having from 4-12 carbon atoms and polymer chosen from among solid resinous polymers of vinyl-substituted aromatic compounds present in amounts ranging from about 10 to about 75 parts by weight per 100 parts by weight of the copolymer and solid resinous copolymers of ethylene present in an amount of about 5 to about 50 parts by weight per 100 parts by weight of the copolymer are blended with a sufficient amount of polarizing agent to achieve rapid heating through response to microwave treatment, blowing agent in an amount sufficient to provide a sponge-like, rubbery porosity to an article molded therefrom, and, optionally, cellular control agent. Composition is melted at a temperature that activates the blowing agent, molded, and removed from the mold as an article having a sponge-like interior surrounded by polymeric skin.

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patent: 3826776 (1974-07-01), Wright
patent: 3959545 (1976-05-01), Siedenstrang
patent: 4022856 (1977-05-01), Maxey

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