Weatherable, thermostable polymers having improved flow...

Details Weatherable, thermostable polymers having improved flow... Weatherable, thermostable polymers having improved flow...

2005-03-01

2005-03-01

Acquah, Samuel A. (Department: 1711)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C528S176000, C528S190000, C528S193000, C528S194000, C528S196000, C525S437000, C525S444000, C525S446000

Reexamination Certificate

active

06861482

ABSTRACT:
The present invention describes the incorporation of several types of soft-block materials into resorcinol phthalate-co-polycarbonate polymers. In preferred embodiments, the soft-block materials contain aliphatic moieties or silicones as flexibilizing units. Several methods of incorporation into the copolymer structure are described including co-reaction of diols with iso/terephthaloyl chloride, replacement of the normal chainstopper with a p-alkylphenol, replacement of a portion of the bisphenol A with an aliphatic ester-bisphenol, and co-reaction of aliphatic diacid chlorides. The polymers of the present invention have good flow characteristics at temperatures generally used for coating, and have good thermostability and weatherability.

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