Coextruded polycarbonate sheet comprising Bis (2,6-dihydroxy-3,5 dibenzoylphenyl) methane

Claim 2

The blend of claim 1 which further comprises an impact-modifying proportion of an impact-modifier.

Claim 3

The blend of claim 1 wherein the polycarbonate resin has recurring carbonate chain units of the formula: - wherein D is a divalent aromatic radical of the formula: wherein A is a divalent hydrocarbon radical containing from 1 to about 15 carbon atoms; a substituted divalent hydrocarbon radical containing from 1 to about 15 carbon atoms and substituent groups such as halogen; -S- ; -S(O)- ; -S(O) 2 -; -O- ; or -C(O)- ; each X is independently selected from the group consisting of hydrogen, halogen, and a monovalent hydrocarbon radical such as an alkyl group of from 1 to about 8 carbon atoms, an aryl group of from 6-18 carbon atoms, an aralkyl group of from 7 to about 14 carbon atoms, an alkaryl group of from 7 to about 14 carbon atoms, an alkoxy group of from 1 to about 8 carbon atoms, or an aryloxy group of from 6 to 18 carbon atoms; and m is zero or 1 and n is an integer of from 0 to 5; interrupted by recurring carboxylic chain units of the formula: - - O - R 1 - O - D - wherein D is as defined above and R 1 is a divalent alkylene, alkylidiene or cycloalkylene radical; a divalent aromatic radical; a divalent aliphatic-aromatic hydrocarbon radical; or two or more aromatic groups connected through non-aromatic linkages of the formula: - E - wherein E is a divalent alkylene or alkylidene group; two or more alkylene or alkylidene groups, connected by a non-alkylene or alkylidene group, connected by a non-alkylene or non-alkylidene group; a cycloaliphatic group of five to seven carbon atoms, inclusive; a cycloalkylidene of five to seven carbon atoms, inclusive; carbon-free sulfur-containing linkage; a carbonyl group; a direct bond; a tertiary nitrogen group; or a silicon-containing linkage.

Claim 4

The composition of claim 1 wherein the polycarbonate is the phosgenation product of bisphenol-A and an aliphatic diacid of the formula:- HOOC -R 1 - COOH wherein R 1 is alkylene.

Claim 5

The composition of claim 1 which further comprises a fibrous reinforcing agent.

Claim 6

An article thermoplastically molded from the composition of claim 1.

Claim 7

A weatherable, coextruded article, which comprises an unprotected base resin of a formed polycarbonate having a thickness of from 1 to 500 mils, having adhered thereto a 1 to 10 mil thick protective layer of the composition of claim 1.

Claim 8

The article of claim 7 wherein the base resin is a straight chain aromatic polycarbonate.