Flame retardant low Tg polyestercarbonate

Details Flame retardant low Tg polyestercarbonate Flame retardant low Tg polyestercarbonate

1996-10-25

1998-07-07

Mosley, Terressa

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524165, 524611, 524612, 525146, C08J 542

Patent

active

057770093

ABSTRACT:
A polyestercarbonate copolymer blend which exhibits a glass transition temperature lower than bisphenol-A carbonate homopolymer, shows improved processability and fire-retardancy. The desired lower Tg and improved flow can be achieved by the polycondensation of a dihydric phenol and aliphatic dicarboxylic acid. The condensate is polymerized with a carbonate forming reagent. The resin is fire-retarded with a mixture of halogenated polycarbonate, potassium diphenylsulfone sulfonate and polytetrafluoroethylene.

REFERENCES:
patent: 3448046 (1969-06-01), Schalin
patent: 4454275 (1984-06-01), Rosenquist

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