Thermotropic aromatic copolyesters and processes for their prepa

Details Thermotropic aromatic copolyesters and processes for their prepa Thermotropic aromatic copolyesters and processes for their prepa

1980-02-26

1981-08-18

Welsh, Maurice J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528193, C08G 6364

Patent

active

042847575

ABSTRACT:
A thermotropic carbonate polyester of high molecular weight which can be shaped is disclosed, characterized in that it possesses an inherent viscosity of more than 0.3 dlg.sup.-1 (measured on a solution containing 0.5 g of polymer in 100 cm.sup.3 of a 50/5 by volume mixture of para-chlorophenol and 1,2-dichloroethane) and a flow point which is above or equal to 150.degree. C. and below 330.degree. C., and in that it consists essentially of units of the formulae:

REFERENCES:
patent: 3169121 (1965-02-01), Goldberg
patent: 4107143 (1978-08-01), Inata et al.
patent: 4156070 (1979-05-01), Jackson et al.

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