Method of adding flame retardant to vinyl aromatic polymers made

Details Method of adding flame retardant to vinyl aromatic polymers made Method of adding flame retardant to vinyl aromatic polymers made

1990-07-31

1991-02-19

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 60, 521 88, 521 90, 521 97, 521907, C08J 918, C08J 920

Patent

active

049944991

ABSTRACT:
A method of introducing flame retardants into expandable vinyl aromatic polymer beads made in a one-step process is disclosed. Flame retardants with good solubility in blowing agents are introduced after monomer conversion is substantially complete, resulting in vinyl aromatic polymer beads with low residual monomer content.

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