Flame retardants

C - Chemistry – Metallurgy – 07 – F

Patent

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402/353, 260/461

C07F 9/12 (2006.01) C08G 79/04 (2006.01) C08K 5/52 (2006.01) C08L 85/02 (2006.01) C08L 101/00 (2006.01)

Patent

CA 1117966

ABSTRACT: This invention relates to flame-retardant polymeric alkyl aryl phosphates prepared by Friedel-Crafts conden- sation. The polymeric alkyl aryl phosphates may be made by Friedel-Crafts condensation of chloroalkyl aryl phos- phates and alkenyl aryl phosphates derived therefrom. Alternatively, the polymeric alkyl aryl phosphates may be made by Friedel-Crafts condensation of phenols followed by phosphorylation of the Friedel-Crafts condensate. The flame-retardant polymeric alkyl aryl phosphates of the present invention are particularly suitable for use as an additive, having little or no plasticizing effect in flammable organic plastics.

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