Novel copolycarbonate

Details Novel copolycarbonate Novel copolycarbonate

1988-08-03

1989-08-08

Welsh, Maurice J.

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

Synthetic resins

From silicon reactant having at least one...

528 29, 528 80, 528 85, 528272, 528335, 528370, C08G 1828

Patent

active

048553778

ABSTRACT:
A novel copolycarbonate is provided, which comprises recurring units respectively of the formulae: ##STR1## in a molar ratio of units (A) to units (B) of from 9:1 to 1:9. The copolycarbonate has a number average molecular weight of from 300 to 50,000. The copolycarbonate is useful as a reactive polymer for producing final polymers such as a polyurethane and a thermoplastic elastomer. The copolycarbonate as well as various final polymers produced therefrom have excellent resistance to hydrolysis, light, chlorine, oxidative degradation, heat, etc. The polyurethane and the thermoplastic elastomer containing units of the novel copolycarbonate as soft segments exhibit remarkably improved flexibility and elastic recovery as compared to those of the conventional polymers.

REFERENCES:
patent: 3639354 (1972-02-01), Muller
patent: 4013702 (1977-03-01), Cartier
patent: 4101529 (1978-07-01), Ammons
patent: 4103070 (1978-07-01), Ammons
patent: 4105641 (1978-08-01), Buysch
patent: 4129715 (1978-12-01), Chen
patent: 4201720 (1980-05-01), Passagne
patent: 4362825 (1982-12-01), Grabhoefer
patent: 4374935 (1983-02-01), Decker

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