Thermoplastic benzophenone polyester

Details Thermoplastic benzophenone polyester Thermoplastic benzophenone polyester

1977-06-17

1979-01-30

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, C08G 6318, C08G 6324

Patent

active

041372182

ABSTRACT:
A thermoplastic benzophenone polyester consisting essentially of recurring units of the formula: ##STR1## having an intrinsic viscosity of at least 0.85 deciliter/gram as measured in 1:1 phenol/tetrachloroethane at 25.degree. C, is useful for making shaped articles having high impact strength.
A process for preparing a thermoplastic polyester according to the above formula is also described which comprises the steps of (a) adding a solution of 4,4'-benzophenonedicarboxylic acid halide in an inert, water-immiscible organic solvent to a basic aqueous solution of a salt of 2,2-bis(4'-hydroxyphenyl)propane to form and precipitate the polyester during the addition and (b) recovering the precipitated polyester.
There is also provided a shaped article prepared from the polyester having an impact strength of at least about 2 ft.lb./in. of notch as measured by the Izod impact test, ASTM D-256-56.

REFERENCES:
patent: 3028364 (1962-04-01), Conix et al.
patent: 3297633 (1967-01-01), Hindersinn et al.
patent: 3317464 (1967-05-01), Conix

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