Process for forming anti-lumping and fast-cool vinyl aromatic ex

Details Process for forming anti-lumping and fast-cool vinyl aromatic ex Process for forming anti-lumping and fast-cool vinyl aromatic ex

1983-01-31

1983-12-27

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 56, 521 57, 521 60, 521139, 521140, 525314, 525901, C08J 918

Patent

active

044231601

ABSTRACT:
Expandable vinyl aromatic polymers are produced, which exhibit anti-lumping properties and fast-cool properties upon formation of foamed articles therefrom, by polymerizing a vinyl aromatic monomer, in which is dissolved 0.5-4.0 percent, based on the monomer, of a graded diblock rubbery copolymer of 2-50 percent of polymerized vinyl aromatic monomer and 50-98 percent conjugated diene, the polymerization forming vinyl aromatic polymer containing the graded diblock rubbery copolymer, and impregnating the polymer so produced, with a blowing agent.

REFERENCES:
patent: 2857339 (1958-10-01), Colwell
patent: 2857340 (1958-10-01), Colwell
patent: 3558534 (1971-01-01), Niechwiadowicz
patent: 3956203 (1976-05-01), Burger
patent: 3972843 (1976-08-01), De Jong
patent: 4269871 (1981-05-01), Blommers et al.
patent: 4304881 (1981-12-01), Aoki et al.

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