Flame retardant aromatic polycarbonate compositions made...

Details Flame retardant aromatic polycarbonate compositions made... Flame retardant aromatic polycarbonate compositions made...

C - Chemistry, Metallurgy

08

L

402/174, 400/560

C08L 69/00 (2006.01) C08L 67/00 (2006.01) C08G 63/62 (1980.01)

Patent

CA 1178394

ABSTRACT OF THE DISCLOSURE Improved flame retardance is imparted to high molecular weight aromatic polycarbonate resins by selecting appropriate fluorinated diphenols and incorporating them in homopolymers or copolymers. The fluorinated diphenols have at least one fluorinated alkyl or fluorinated aryl group upon the methylene carbon atom positioned between the two phenol ring structures. The polycarbonates having improved flame retardance are made from fluorinated diphenols and halogen-containing carbonate precursors. Copolycarbonates having improved flame retardance are derived from the fluorinated diphenols and non-fluorinated diphenols. The flame retardant polycarbonates may be used in films and molded articles where improved resistant to flame is desirable.

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