Preparation of by the bischloroformate process of soft segment p

Details Preparation of by the bischloroformate process of soft segment p Preparation of by the bischloroformate process of soft segment p

1994-08-01

1996-02-27

Seidleck, James J.

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

Synthetic resins

From reactant having a halogen atom or oxygen single bonded...

528176, 528179, 528193, 528196, 528370, 528372, 528198, C08G 6400

Patent

active

054949971

ABSTRACT:
A process for preparing a polyestercarbonate copolymer which is nearly devoid of diaryl-carbonates and that exhibits a glass transition temperature lower than bisphenol-A carbonate homopolymer, and that shows improved processability is herein described. 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.

REFERENCES:
patent: 4737573 (1988-04-01), Silva et al.
patent: 4743676 (1988-05-01), Silva et al.
patent: 4983706 (1991-01-01), Fontana et al.

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