Anti-clumping agents for expandable vinylaromatic-acrylonitrile

Details Anti-clumping agents for expandable vinylaromatic-acrylonitrile Anti-clumping agents for expandable vinylaromatic-acrylonitrile

1990-04-27

1991-04-09

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 60, 521147, C08V 9224

Patent

active

050065653

ABSTRACT:
The clumping together of expandable vinylaromatic-acrylonitrile copolymer particles during expansion of such particles is substantially completely reduced by coating the unexpanded virgin particles with from 0.2 to 1.5 weight percent, based on weight of expandable copolymer particles, of particulate magnesium oxide.

REFERENCES:
patent: 4218511 (1980-08-01), Hahn
patent: 4495224 (1985-01-01), Rigler
patent: 4608394 (1986-08-01), Ingram
patent: 4681779 (1987-07-01), Ingram

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