INTUMESCENT FIRE RETARDANT POLYMER COMPOSITIONS

摘要

The present invention relates to intumescent fire retardant compositions for polymers such as olefin polymers, polyester resins, polyurethane resins etc. According to the invention, the intumescent fire retardant compositions contain a thermolized product obtained from a system comprising P.sub.2 O.sub.5 or a P.sub.2 O.sub.5 -precursor together with triethanolamine. The ratio between the constituents is between 0.5 to 2.0 parts by weight P.sub.2 O.sub.5 to 1 part triethanolamine. The intumescent fire retardant compositions according to the present invention obviate the need for using of halogen-containing fire retardants which produce acid vapors during decomposition.