Alumina trihydrate as flame retardant agent for urethane-modifie

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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521117, 521123, 521126, 521129, 521131, 521160, 521901, 521902, 521906, C08G 1814, C08G 1824, C08J 900

Patent

active

041502078

ABSTRACT:
Urethane-modified carbodiimide-isocyanurate foams are prepared by catalytically condensing (a) an organic polyisocyanate with a polyol or (b) a quasi-prepolymer in the presence of a blowing agent and from 20 parts to 100 parts by weight of alumina trihydrate. The resulting foams are characterized by improved flame retardancy without loss in strength properties.

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