Thermoplastic polyester blends

Claim 2

A thermoplastic polyblend composition consisting essentially of: (A) 95 to 25% by weight of polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and (B) 5 to 75% by weight of a thermoplastic copolymer of (1) by weight from about 95 to about 70 percent of at least one vinyl aromatic monomer, (2) by weight from about 5 to about 30 percent of acrylic acid or methacrylic acid, or both, and (3) optionally, at least one additional copolymerizable termonomer.

Claim 3

A composition of claim 1 wherein said component (A) is polyethylene terephthalate.

Claim 4

A composition of claim 1 wherein said thermoplastic copolymer (B) is a copolymer of a vinyl aromatic monomer and acrylic acid.

Claim 5

A composition of claim 3 wherein said vinyl aromatic monomer is predominantly styrene.

Claim 6

A composition of claim 1 further including an impact modifier in the polyblend.

Claim 7

A composition of claim 5 wherein said impact modifier is an ionomer resin.

Claim 8

A composition of claim 5 wherein said impact modifier is a copolyetherester segmented block copolymer.

Claim 9

A composition of claim 1 wherein said polyethylene terephthalate has an intrinsic viscosity of between about 0.4 and 1.5 as measured at 25° C. using a solvent consisting of 60% by weight of phenol and 40% by weight of tetrachloroethane.

Claim 10

A thermoplastic polyblend composition consisting essentially of: (A) 95 to 25% by weight, exclusive of the substrate rubber, of polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and (B) 5 to 75% by weight, exclusive of the substrate rubber, of a rubber-modified thermoplastic copolymer of (1) by weight from about 95 to about 70 percent of at least one vinyl aromatic monomer, (2) by weight from about 5 to about 30 percent of acrylic acid or methacrylic acid, or both, and (3) optionally, at least one additional copolymerizable termonomer, said copolymer grafted onto a substrate rubber, the rubber being present in amounts up to as much as about 30 percent by weight based on the weight of the copolymerized monomers.

Claim 11

A thermoplastic polyblend composition consisting essentially of: (A) 95 to 25% by weight, exclusive of the substrate rubber, of polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and (B) 5 to 75% by weight, exclusive of the substrate rubber, of a rubber-modified thermoplastic copolymer of (1) by weight from about 95 to about 70 percent of at least one vinyl aromatic monomer, (2) by weight from about 5 to about 30 percent of acrylic acid or methacrylic acid, or both, and (3) optionally, at least one additional copolymerizable termonomer, said copolymer grafted onto a substrate rubber, the rubber being present in amounts up to as much as about 30 percent by weight based on the weight of the copolymerized monomers.

Claim 12

A composition of claim 9 wherein said component (A) is polyethylene terephthalate.

Claim 13

A composition of claim 9 wherein said thermoplastic copolymer (B) is a rubber-modified graft copolymer of a vinyl aromatic monomer and acrylic acid.

Claim 14

A composition of claim 11 wherein said vinyl aromatic monomer is predominantly styrene.

Claim 15

A composition of claim 9 further including an impact modifier in the polyblend.

Claim 16

A composition of claim 13 wherein said impact modifier is an ionomer resin.

Claim 17

A composition of claim 13 wherein said impact modifier is a copolyetherester segmented block copolymer.

Claim 18

A composition of claim 9 wherein said polyethylene terephthalate has an intrinsic viscosity of between about 0.4 and 1.5 as measured at 25° C. using a solvent consisting of 60% by weight of phenol and 40% by weight of tetrachloroethane.

Claim 19

A thermoplastic polyblend composition consisting essentially of: (A) 95 to 25% by weight of polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and (B) 5 to 75% by weight of a thermoplastic copolymer of (1) by weight from about 95 to about 70 percent of at least one vinyl aromatic monomer, (2) by weight from about 5 to about 30 percent of acrylic acid or methacrylic acid, or both, and (3) at least one additional copolymerizable termonomer selected from the group of C 4 -C 6 alpha-olefins, C 1 -C 3 alkyl esters of acrylic or methacrylic acid, acrylonitrile, and methacrylonitrile.

Claim 20

A thermoplastic polyblend composition consisting essentially of: (A) 95 to 25% by weight of polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and (B) 5 to 75% by weight of a thermoplastic copolymer of (1) by weight from about 95 to about 70 percent of at least one vinyl aromatic monomer, (2) by weight from about 5 to about 30 percent of acrylic acid or methacrylic acid, or both, and (3) at least one additional copolymerizable termonomer selected from the group of C 4 -C 6 alpha-olefins, C 1 -C 3 alkyl esters of acrylic or methacrylic acid, acrylonitrile, and methacrylonitrile.

Claim 21

A thermoplastic polyblend composition consisting essentially of: (A) 95 to 25% by weight, exclusive of the substrate rubber, of polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and (B) 5 to 75% by weight, exclusive of the substrate rubber, of a rubber-modified thermoplastic copolymer of (1) by weight from about 95 to about 70 percent of at least one vinyl aromatic monomer, (2) by weight from about 5 to about 30 percent of acrylic acid or methacrylic acid, or both, and (3) at least one additional copolymerizable termonomer selected from the group of C 4 -C 6 alpha-olefins, C 1 -C 3 alkyl esters of acrylic or methacrylic acid, acrylonitrile, and methacrylonitrile said copolymer grafted onto a substrate rubber, the rubber being present in amounts up to as much as about 30 percent by weight based on the weight of the copolymerized monomers.

Claim 22

A thermoplastic polyblend composition consisting essentially of: (A) 95 to 25% by weight, exclusive of the substrate rubber, of polyethylene terephthalate, or a copolyester or blend thereof containing at least 80 percent by weight of polyethylene terephthalate, and (B) 5 to 75% by weight, exclusive of the substrate rubber, of a rubber-modified thermoplastic copolymer of (1) by weight from about 95 to about 70 percent of at least one vinyl aromatic monomer, (2) by weight from about 5 to about 30 percent of acrylic acid or methacrylic acid, or both, and (3) at least one additional copolymerizable termonomer selected from the group of C 4 -C 6 alpha-olefins, C 1 -C 3 alkyl esters of acrylic or methacrylic acid, acrylonitrile, and methacrylonitrile said copolymer grafted onto a substrate rubber, the rubber being present in amounts up to as much as about 30 percent by weight based on the weight of the copolymerized monomers.