Process for the preparation of expandable vinyl aromatic polymer

Details Process for the preparation of expandable vinyl aromatic polymer Process for the preparation of expandable vinyl aromatic polymer

1990-05-04

1990-12-25

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 98, 521907, C08J 918

Patent

active

049803824

ABSTRACT:
Fire-retardant expandable vinyl aromatic polymer beads are prepared by an aqueous suspension method whereby micronized hexabromocyclododecane and a volatile aliphatic hydrocarbon foaming agent are incorporated into particles of a thermoplastic such as polystyrene. The beads are useful in the preparation of molded foam articles having excellent resistance to flame.

REFERENCES:
patent: 3093599 (1963-06-01), Mueller-Tamm
patent: 3503905 (1970-03-01), Zuern et al.
patent: 3956203 (1976-05-01), Burger et al.
patent: 4281067 (1981-07-01), Kienzle et al.
patent: 4520136 (1985-05-01), Schwarz
patent: 4761432 (1988-08-01), Sonnenberg et al.
patent: 4927858 (1990-05-01), Joyce et al.
Jpn. Kokai-63-215740 see Chem. Abs. 110, 193973r.

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