Process for preparing foamed vinylaromatic polymer products

Details Process for preparing foamed vinylaromatic polymer products Process for preparing foamed vinylaromatic polymer products

1990-02-13

1991-09-24

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 98, 521907, C08L 2518, C08L 2708

Patent

active

050514520

ABSTRACT:
Novel polymeric blends comprising from 45-90% by weight of at least one vinylaromatic resinous material, 10-55% by weight of at least one vinylidene chloride polymer and, optionally but preferably, an effective amount of at least one blowing or expansion agent. The invention blends provide products having improved oxygen and water permeability, improved toughness, and improved flammability resistance.

REFERENCES:
patent: 3595815 (1971-07-01), Willersinn et al.
patent: 3655600 (1972-04-01), Stevens
patent: 3793416 (1970-04-01), Finkmann
patent: 4035315 (1977-07-01), Ingram
patent: 4241191 (1980-12-01), Keppler
patent: 4506037 (1985-03-01), Suzuki et al.
patent: 4699810 (1987-10-01), Blakeman et al.
patent: 4730009 (1988-03-01), Soredal

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