Low temperature impact resistant polycarbonate/poly (cyclohexane-dimethylene terephthalate)/core-shell acrylate copolymer compositions

Claim 2

An improved thermoplastic molding composition exhibiting improved impact strength at temperatures of about -30°C. and lower, said composition comprising in physical admixture: (a) an aromatic polycarbonate, (b) a polyester resin, and (c) an effective amount of an impact modifier comprising a core-shell multi-stage polymer having a rubbery core and a (meth)acrylate (co-)polymer outer shell,

Claim 3

the improvement comprising said composition containing as component (b) a polyester resin derived in major proportion from cyclo­hexanedimethanol and a hexacarbocyclic dicarboxylic acid.

Claim 4

the improvement comprising said composition containing as component (b) a polyester resin derived in major proportion from cyclo­hexanedimethanol and a hexacarbocyclic dicarboxylic acid.

Claim 5

A composition as defined in claim 1 wherein im­pact modifier (c) is present in an amount of from about 1.0 to about 50 parts by weight per 100 parts by weight of (a), (b) and (c) combined.

Claim 6

A composition as defined in Claim 2 wherein component (a) comprises an aromatic polycarbonate.

Claim 7

A composition as defined in Claim 3 wherein component (a) comprises poly(bisphenol-A carbonate).

Claim 8

A composition as defined in Claim 2 wherein component (b) has repeating units of the formula: wherein the substituted cyclohexane ring is selected from the group consisting of the cis- and trans- isomers thereof and R represents an organic radical containing from 6 to 20 carbon atoms which is the decarboxylated residue derived from a hexacarbocyclic dicarboxylic acid.

Claim 9

A composition as defined in Claim 5 wherein the polyester resin has the repeating unit:

Claim 10

A composition as defined in Claim 1 wherein the core in said multi-stage polymer (c) comprises units derived from n-butyl acrylate.

Claim 11

A composition as defined in Claim 1 wherein the core in said multi-stage polymer (c) comprises units derived from butadiene.

Claim 12

An improved thermoplastic molding composition exhibiting improved impact strength at temperatures of about -30°C. and below, said composition comprising: (a) a poly(bisphenol-A carbonate), (b) a polyester resin having repeating units of the formula: wherein the substituted cyclohexane ring is selected from the group consisting of the cis- and trans- isomers thereof and R represents an organic radical containing from 6 to 20 carbon atoms which is the decarboxylated residue derived from a hexacarbocyclic dicarboxylic acid; and (c) an effective amount of from about 1 to about 20 parts by weight of an impact modifier comprising a core-shell multi-stage polymler having a rubbery core derived from n-butyl acrylate, butadiene, or a mixture thereof, and a (meth)acrylate (co-)polymer outer shell.

Claim 13

An improved thermoplastic molding composition exhibiting improved impact strength at temperatures of about -30°C. and below, said composition comprising: (a) a poly(bisphenol-A carbonate), (b) a polyester resin having repeating units of the formula: wherein the substituted cyclohexane ring is selected from the group consisting of the cis- and trans- isomers thereof and R represents an organic radical containing from 6 to 20 carbon atoms which is the decarboxylated residue derived from a hexacarbocyclic dicarboxylic acid; and (c) an effective amount of from about 1 to about 20 parts by weight of an impact modifier comprising a core-shell multi-stage polymler having a rubbery core derived from n-butyl acrylate, butadiene, or a mixture thereof, and a (meth)acrylate (co-)polymer outer shell.

Claim 14

A composition as defined in Claim 1 which also includes (d) a reinforcing amount of a reinforcing agent.

Claim 15

A composition as defined in Claim 10 wherein reinforcing agent comprises carbon fibers.