发明授权
US4468482A Flame retarded polyisocyanurate foam made from polyol derived from halogen containing dicarboxylic acid anhydride 失效
由含有二羧酸酐的卤素衍生的多元醇制成的阻燃聚异氰脲酸酯泡沫

Flame retarded polyisocyanurate foam made from polyol derived from
halogen containing dicarboxylic acid anhydride
摘要:
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 an aliphatic polyol having at least three hydroxy groups and an aliphatic diol, to obtain a substantially fully esterified halogen containing product.
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