Molding compositions

Claim 2

A composition having a smooth, glossy surface in molded form when molded at mold temperatures of between 85°-110° C., which composition consists essentially of: A. polyethylene terephthalate having an intrinsic viscosity of at least about 0.4; B. between about 10 and about 60 percent by weight reinforcing or filling material; C. material present in an amount sufficient to provide ΔH H /ΔH c ratio of less than 0.25 to a mixture of components A, B and C, said material consisting essentially of at least one sodium or potassium salt of a carboxyl containing organic polymer; D. organic ester present in an amount sufficient to provide a Tpk at least 4° C. lower than the Tpk of a mixture of components A, B and C, selected from the product of an aliphatic carboxylic acid of 1 to 20 carbon atoms containing 1 to 3 carboxyl groups, and an alcohol of the formula HO(R"O) y R'" where R" is --H or an aliphatic hydrocarbon radical of 2-20 carbon atoms, and when R'" is --H, y is a cardinal number between 2 and 15, and when R'" is an aliphatic hydrocarbon radical, y is a cardinal number between 1 and 15.

Claim 3

The composition of claim 1 wherein the salt of a carboxyl containing organic polymer of Component C is the sodium or potassium salt of a copolymer of an olefin and acrylic or methacrylic acid.

Claim 4

The composition of claim 1 wherein the salt of a carboxyl containing organic polymer of Component C is the sodium salt of a copolymer of ethylene and methacrylic acid in which at least 30% of the carboxyl groups are neutralized with sodium.

Claim 5

A composition having a smooth, glossy surface in molded form when molded at mold temperatures of between 85°-110° C., which composition consists essentially of; A. polyethylene terephthalate having an intrinsic viscosity of at least about 0.4; B. between about 10 and about 60 percent by weight reinforcing or filling material; C. material present in an amount sufficient to provide a ΔH H /ΔH c ratio of less than 0.25 to a mixture of components A, B and C, said material consisting essentially of at least one sodium or potassium salt of a copolymer of an olefin and acrylic or methacrylic acid; D. organic ester present in an amount sufficient to provide a Tpk at least 4° C. lower than the Tpk of a mixture of components A, B and C, selected from the product of an aliphatic carboxylic acid of 4 to 10 carbon atoms having 1 or 2 carboxyl groups, and an alcohol of the formula HO(R"O) y R'" wherein R" is an aliphatic hydrocarbon radical of 2-15 carbon atoms, R'" is --H or an aliphatic hydrocarbon radical of 2-20 carbon atoms, and when R'" is --H, y is a cardinal number between 2 and 15, and when R'" is an aliphatic hydrocarbon radical, y is a cardinal number between 1 and 15.

Claim 6

A composition having a smooth, glossy surface in molded form when molded at mold temperatures of between 85°-110° C., which composition consists essentially of; A. polyethylene terephthalate having an intrinsic viscosity of at least about 0.4; B. between about 10 and about 60 percent by weight reinforcing or filling material; C. material present in an amount sufficient to provide a ΔH H /ΔH c ratio of less than 0.25 to a mixture of components A, B and C, said material consisting essentially of at least one sodium or potassium salt of a copolymer of an olefin and acrylic or methacrylic acid; D. organic ester present in an amount sufficient to provide a Tpk at least 4° C. lower than the Tpk of a mixture of components A, B and C, selected from the product of an aliphatic carboxylic acid of 4 to 10 carbon atoms having 1 or 2 carboxyl groups, and an alcohol of the formula HO(R"O) y R'" wherein R" is an aliphatic hydrocarbon radical of 2-15 carbon atoms, R'" is --H or an aliphatic hydrocarbon radical of 2-20 carbon atoms, and when R'" is --H, y is a cardinal number between 2 and 15, and when R'" is an aliphatic hydrocarbon radical, y is a cardinal number between 1 and 15.

Claim 7

The composition of claims 1, 2 or 4 wherein Component B is glass fiber.

Claim 8

The composition of claims 1, 2 or 4 wherein Component B is glass fiber and said composition also contains 0.1 to 1.5 percent by weight of an epoxy compound.

Claim 9

The composition of claims 1, 2 or 4 wherein Component B is mica.

Claim 10

The composition of claims 1, 2 or 4 wherein Component B is a mixture of glass fiber and mica.

Claim 11

The composition of claim 1 in melt-extruded form.

Claim 12

A process for manufacturing a molded article having a smooth, glossy surface which comprises shaping a composition defined in claims 1, 2, 3 or 4 in a mold at a surface mold temperature of below 110° C.