Flame retardant phosphate ester derivatives

Details Flame retardant phosphate ester derivatives Flame retardant phosphate ester derivatives

C - Chemistry, Metallurgy

08

G

402/48

C08G 8/28 (2006.01) C08K 3/32 (2006.01) C09K 3/28 (1980.01)

Patent

CA 1052496

FLAME RETARDANT PHOSPHATE ESTER DERIVATIVES ABSTRACT The present invention relates to polymer compositions and to a process of producing phenolic novolak resins having a high phosphorus content. It is known that phenolic novolak resins may be reacted with P2O5. However, it has now been found that if the novolak has substantially entirely ortho ortho linkage the amount of phosphorus, suitably in the form of P2O5, P2S5, P2O3 or mixtures thereof that may be reacted is greatly increased and the polymer produced has enhanced fire-retardant properties. The present polymers have a wide utility in the production of flame-retardant molding compositions and laminates. - 1 -

220361

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