Blends of elastomeric polyetherester copolymers with thermoplastic polycarbonates and thermoplastic polyalkylene terephthalates

Claim 2

A copolyetherester-containing blend consisting essentially of a copolyetherester resin, a polycarbonate resin and a poly(alkylene terephthalate) resin wherein the polycarbonate is present in an amount of from about 5 to about 150 parts by weight per 100 parts copolyetherester, and the poly(alkylene terephthalate) is present in an amount up to about 70% by weight based on the combined weight of copolyetherester and polycarbonate.

Claim 3

The composition of claim 1 wherein the polycarbonate is present in an amount of from about 5 to about 100 parts by weight per 100 parts copolyetherester, and the poly(alkylene terephthalate) is present in an amount up to about 50% by weight based on the combined weight of copolyetherester and polycarbonate.

Claim 4

The composition of claim 1 wherein the polycarbonate is present in an amount of from about 5 to about 27 parts by weight per 100 parts copolyetherester, and the poly(alkylene terephthalate) is present in an amount of from 17 to 34% by weight based on the combined weight of copolyetherester and polycarbonate.

Claim 5

The composition of claim 1 wherein the copolyetherester consists essentially of a multiplicity of recurring intralinear long-chain and short-chain ester units connected head-to tail through ester linkages, said long-chain ester units being represented by the following structure: ##STR6## and said short ester units being represented by the following structure ##STR7## wherein G is a divalent radical remaining after removal of terminal hydroxy groups from poly(alkylene oxide) glycols having a carbon-to-oxygen ratio of about 2.0-4.3 and a molecular weight between about 400-6000; R is a divalent radical remaining after removal of carboxyl groups from one or more dicarboxylic acids having a molecular weight less than about 300; and D is a divalent radical remaining after removal of hydroxyl groups from one or more saturated or unsaturated, low molecular weight diols having a molecular weight less than about 250; with the provision that the short-chain ester units consitute about 15-95% by weight of the copolyetherester.

Claim 6

The composition of claim 4 wherein the copolyetherester is derived from: (a) An aromatic dicarboxylic acid or acid combination consisting of: (i) 70 to 100 mole % dimethyl terephthalate, and; (ii) 0 to 30 mole % of dimethyl isophthalate or dimethylphthalate; (b) A diol or diol combination consisting of: (i) 50 to 100 mole % butanediol, and; (ii) 0 to 50 mole % of a C 2 to C 8 diol, and (c) Poly(tetramethylene oxide) glycol.

Claim 7

The composition of claim 4 wherein the copolyetherester is derived from: (a) Dimethyl terephthalate (b) A diol or diol combination consisting of: (i) 50 to 100 mole % butanediol, and; (ii) 0to 50 mole % hexanediol or butenediol, and; (c) Poly(tetramethylene oxide) glycol.

Claim 8

The composition of claim 6 wherein the copolyetherester is derived from butane diol, poly(tetramethylene oxide) glycol and dimethylterephthalate.

Claim 9

The composition of claim 6 wherein the copolyetherester is derived from butane diol, hexane diol, poly(tetramethylene oxide) glycol and dimethylterephthalate.

Claim 10

The composition of claim 6 wherein the copolyetherester is derived from butane diol, butenediol, poly(tetramethylene oxide) glycol and dimethylterephthalate.

Claim 11

The composition of claim 1 wherein the polycarbonate is derived from a dihydric phenol and a carbonate precursor.

Claim 12

The composition of claim 10 wherein the dihydric phenol is 2,2-bis(4-hydroxy phenyl)propane and the carbonate precursor is selected from the group consisting of phosgene, haloformates, and carbonate esters.

Claim 13

The composition of claim 10 wherein the dihydric phenol is 2,2-bis(4-hydroxy phenyl) propane and the carbonate precursor is phosgene.

Claim 14

The composition of claim 1 wherein the polycarbonate contains repeating structural units of the formula: wherein A is the divalent aromatic radical remaining after removal of the hydrozy groups of the dihydric phenol employed in preparing the polymer.

Claim 15

The composition of claim 1 wherein the polycarbonate is derived from a dihydric phenol, a dicarboxylic acid, and a carbonate precursor.

Claim 16

The composition of claim 1 wherein the poly(alkylene terphthalte) contains repeating structural units of the formula: ##STR8## wherein R 3 represents the divalent radical remaining after removal of the hydroxy groups of the glycol employed in the preparation of the polyester.

Claim 17

The composition of claim 1 wherein the poly(alkylene terephthalate) is derived from one or more glycols selected from the group consisting of ethylene glycol, 1,4-butanediol, 2-methyl-1,3-propanediol, 1,6-hexanediol, and 1,4-cyclohexanedimethanol and dimethylterephthalate or terephthalic acid.

Claim 18

The composition of claim 1 wherein the poly(alkylene terephthalate) is selected from the group consisting of poly(ethylene terephthalate) and poly(butylene terephthalate).

Claim 19

The composition of claim 1 wherein the poly(alkylene terephthalate) is poly(butylene terephthalate).

Claim 20

The composition of claim 1 which further consists of up to 60% by weight of an inorganic filler or reinforcing agent selected from the group consisting essentially of carbon powder, clay, mica, and chopped fiberglass.

Claim 21

The composition of claim 1 which further consists of an effective flame retarding amount of a bromine-containing flame retardant alone or in combination with a flame retardant synergist.