Flame retardant polyurethane modified polyisocyanurate

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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521906, 560 83, C08G 1828

Patent

active

044684819

ABSTRACT:
A flame retardant polyurethane-modified polyisocyanurate foam composition containing a flame retardant amount of a normally liquid flame retardant polyol ester. The polyol ester is prepared by a process comprising reacting a halogen containing anhydride of a dicarboxylic acid or a mixture of said anhydrides with 2 to about 10 moles of an aliphatic diol or mixture of diols per mole of said anhydride to obtain a substantially fully esterified halogen containing product.

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