Spirobiindane copolysiloxanecarbonates and method for their prep

Details Spirobiindane copolysiloxanecarbonates and method for their prep Spirobiindane copolysiloxanecarbonates and method for their prep

1988-10-07

1990-01-23

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 21, 528 33, C08G 7704

Patent

active

048959197

ABSTRACT:
Copolysiloxanecarbonate compositions are prepared by the reaction of a carbonate precursor such as phosgene with a mixture of bisphenols including a spirobiindane bisphenol, at least one of said bisphenols containing polydiorganosiloxane moieties. The reaction may take place in one step or sequentially. The products are characterized by low processing temperature, low orientational birefringence and high ductility.

REFERENCES:
patent: 3207814 (1965-09-01), Goldberg
patent: 3277055 (1966-10-01), Goldberg
patent: 3679774 (1972-07-01), LeGrand
patent: 3821325 (1972-06-01), Merritt, Jr. et al.
patent: 3832419 (1974-08-01), Merritt, Jr.
patent: 4167536 (1979-09-01), Factor

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