Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1980-10-27
1981-12-15
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 88, 521 92, 521 97, 521139, 521140, 521915, 525 92, 525 98, 525 99, 525901, C08J 900, C08L 5302
Patent
active
043060340
ABSTRACT:
A molded article simulating the appearance of natural plantation crepe rubber and a method for producing this article. Styrene/butadiene linear or radial block copolymer having a polymerized styrene content of the range of about 20 to about 50 weight percent of the total block copolymer and resinous polymer of vinyl-substituted aromatic compound in the range of about 10 to about 60 parts resinous polymer per 100 parts block copolymer are blended with a sufficient amount of polarizing agent to achieve rapid heating through response to microwave treatment. The composition is melted, molded against a surface mirroring the appearance of plantation crepe rubber, and removed from the mold as an article simulating plantation crepe rubber. In an embodiment of the invention with chemical blowing agent incorporated into the molding composition, an amount of the molding composition is introduced with the mold that upon activation of the blowing agent during the molding operation produces a molded article having a normally dense skin with a microporous interior.
REFERENCES:
patent: 3637554 (1972-01-01), Childers
patent: 4003860 (1977-01-01), Le Clerc
patent: 4073831 (1978-02-01), Tabana et al.
patent: 4075285 (1978-02-01), Tabana et al.
patent: 4195136 (1980-03-01), Sato et al.
patent: 4256850 (1981-03-01), Thorsud
Foelak Morton
Phillips Petroleum Company
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