Process for obtaining polystyrene foam

Details Process for obtaining polystyrene foam Process for obtaining polystyrene foam

1976-09-27

1979-06-26

Woodberry, Edward M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264DIG83, 521 60, 521146, C08J 900

Patent

active

041593685

ABSTRACT:
Polystyrene (copolymer) foam is produced by forming a polystyrene (copolymer) solution in an hermetically sealed container using a solvent having a high vapor pressure and a low boiling point, and progressively releasing the thus formed solution under temperature and pressure conditions allowing rapid evaporation of the solvent.

REFERENCES:
patent: 2023204 (1935-12-01), Munters et al.
patent: 3242238 (1966-03-01), Edberg et al.
patent: 3419506 (1968-12-01), Gander
patent: 3503907 (1970-03-01), Bonner, Jr.
patent: 3657164 (1972-04-01), Jastrow et al.
patent: 3725318 (1973-04-01), Bengtson
patent: 3753932 (1973-08-01), Jenkins

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