US4639480A — Polyester compositions containing a phthalimide

Claim 1

Independent Claim 82 words

A polyester molding composition, comprising: (a) from about 40 to about 95 parts by weight of a polyethylene terephthalate having an intrinsic viscosity of at least 0.4 deciliter/gram measured as a 0.5% by weight solution in a 60:40 mixture of phenol and tetrachloroethane at 25° C.; and (b) from about 0.5 to about 15 parts by weight of a plasticizer comprising a phthalimide, of the formula: ##STR3## where R is alkyl, alkenyl, or alkoxy alkyl with from 12 to 30 carbon atoms.

Claim 2

Dependent Claim 82 words

A polyester molding composition, comprising: (a) from about 40 to about 95 parts by weight of a polyethylene terephthalate having an intrinsic viscosity of at least 0.4 deciliter/gram measured as a 0.5% by weight solution in a 60:40 mixture of phenol and tetrachloroethane at 25° C.; and (b) from about 0.5 to about 15 parts by weight of a plasticizer comprising a phthalimide, of the formula: ##STR3## where R is alkyl, alkenyl, or alkoxy alkyl with from 12 to 30 carbon atoms.

Claim 3

Dependent Claim 114 words

A polyester molding composition comprising: (a) from about 40 to about 95 parts by weight of a polyethylene terephthalate having an intrinsic viscosity of at least about 0.4 deciliter/gram measured as a 0.5% by weight solution in a 60:40 mixture of phenol and tetrachloroethane at 25° C.; (b) from about 0.1 to about 10.0 parts by weight of a nucleating agent; (c) from about 5 to about 60 parts by weight of a reinforcing agent; (d) from about 0.5 to about 15 parts by weight of a plasticizer comprising a phthalimide compound of the general formula ##STR4## wherein R is an alkyl, alkenyl, or alkoxy alkyl group with from 12 to 30 carbon atoms.

Claim 4

Dependent Claim 114 words

A polyester molding composition comprising: (a) from about 40 to about 95 parts by weight of a polyethylene terephthalate having an intrinsic viscosity of at least about 0.4 deciliter/gram measured as a 0.5% by weight solution in a 60:40 mixture of phenol and tetrachloroethane at 25° C.; (b) from about 0.1 to about 10.0 parts by weight of a nucleating agent; (c) from about 5 to about 60 parts by weight of a reinforcing agent; (d) from about 0.5 to about 15 parts by weight of a plasticizer comprising a phthalimide compound of the general formula ##STR4## wherein R is an alkyl, alkenyl, or alkoxy alkyl group with from 12 to 30 carbon atoms.

Claim 5

Dependent Claim 13 words

The composition of claim 2 wherein the phthalimide compound is an N-alkyl phthalimide.

Claim 6

Dependent Claim 18 words

The composition of claim 3 wherein the N-alkyl phthalimide contains an alkyl group with from 14-16 carbon atoms.

Claim 7

Dependent Claim 38 words

The composition of claim 2 wherein the nucleating agent is selected from the salt of a dimer acid, the salt of a trimer acid or the salt of a mixture of a dimer acid and a trimer acid.

Claim 8

Dependent Claim 33 words

The composition of claim 2 wherein the nucleating agent is a copolymer consisting essentially of 85 wt. % ethylene and 15 wt. % methacrylic acid which has been partially neutralized with sodium ions.

Claim 9

Dependent Claim 11 words

The composition of claim 2 wherein the reinforcing agent is fiberglass.

Claim 10

Dependent Claim 19 words

The composition of claim 2 containing from about 0.1 to about 5 parts by weight of a chain extender.

Claim 11

Dependent Claim 12 words

The composition of claim 8 wherein the chain extender is a polyepoxide.

Claim 12

Dependent Claim 18 words

The composition of claim 2 wherein the polyethylene terephthalate has an intrinsic viscosity of at least about 0.6.

Claim 13

Dependent Claim 18 words

The composition of claim 2 wherein the polyethylene terephthalate comprises a mixture of polyethylene terephthalate and polybutylene terephthalate.

Claim 14

Dependent Claim 34 words

The composition of claim 2 further comprising at least one additive selected from impact modifiers, flow promoters, coloring agents, flame retardants, coupling agents and stabilizers for thermal oxidative and light stabilization in effective amounts.

Claim 15

Dependent Claim 91 words

A polyester molding composition comprising: (a) from about 40 to about 95 parts by weight of polyethylene terephthalate having an intrinsic viscosity of at least about 0.4 deciliters per gram; (b) from about 0.5 to about 5.0 parts by weight of a nucleating agent; (c) from about 5 to about 60 parts by weight of fiberglass; (d) from about 0.5 to about 15 parts by weight of a plasticizer comprising a phthalimide compound of the general formula: ##STR5## wherein R is an alkyl group with from 14 to 26 carbon atoms.

Claim 16

Dependent Claim 91 words

A polyester molding composition comprising: (a) from about 40 to about 95 parts by weight of polyethylene terephthalate having an intrinsic viscosity of at least about 0.4 deciliters per gram; (b) from about 0.5 to about 5.0 parts by weight of a nucleating agent; (c) from about 5 to about 60 parts by weight of fiberglass; (d) from about 0.5 to about 15 parts by weight of a plasticizer comprising a phthalimide compound of the general formula: ##STR5## wherein R is an alkyl group with from 14 to 26 carbon atoms.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1990-01-26	1990-07-28	1991-01-27	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1994-01-26	1994-07-28	1995-01-27	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1998-01-26	1998-07-28	1999-01-27	$7700.00	Window Closed / Lapsed

Polyester compositions containing a phthalimide

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