Chlorinated polyvinyl chloride composition

Details Chlorinated polyvinyl chloride composition Chlorinated polyvinyl chloride composition

1981-09-14

1983-01-25

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264211, 264DIG5, 264DIG13, 521 88, 521 89, 521 95, 521139, 521145, 521909, 521910, 521 81, B29H 720

Patent

active

043702864

ABSTRACT:
Composition of matter adapted to be foamed into essentially a closed cell structure, preponderance of the cells being less than 500 microns in size and containing a chlorofluoroalkane of 1 to 2 carbon atoms, said composition comprising chlorinated polyvinyl chloride resin, and effective amount of a blowing agent, an effective amount of a nucleating agent, and 5 to 20 parts of a processing aid per 100 parts of said resin, said processing aid has a dilute solution viscosity of greater than 2.5 and is selected from copolymers of styrene and acrylonitrile containing 10 to 40% of acrylonitrile.

REFERENCES:
patent: 3267051 (1966-08-01), Landler et al.
patent: 3366580 (1968-01-01), Kraemer, Jr.
patent: 3975315 (1976-08-01), Parks
patent: 4046846 (1977-09-01), Fujimori
patent: 4048272 (1977-09-01), Spicuzza, Jr.
patent: 4165415 (1979-08-01), Adachi et al.

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