Resin compositions

Claim 1

A pigmented thermoplastic resin composition which comprises (A) a thermoplastic resin; (B) a metal phthalocyanine pigment susceptible to degradation by heat; and (C) 0.5 to 30% by weight, based on the weight of pigment (B), as an agent imparting heat stability to component (B), of a sulphonated imidomethyl phthalocyanine having formula I ##STR8## wherein Pc is a phthalocyanine residue optionally substituted by up to 4 chlorine or bromine atoms; M is hydrogen or a metal capable of forming a metal phthalocyanine; m is a value within the range of from 0.05 to 1.0; n is a value within the range of from 0.1 to 4.0; and X together with the group ##STR9## represents a 5-membered cyclic imide which is a succinimide, maleimide, itaconimide, phthalimide, tetrahydrophthalimide, cis-5-norbornene-endo-2,3-dicarboximide, 3,6-endoxo-1,2,3,6-tetrahydrophthalimide, 1,2- or 2,3-naphthalene dicarboximide or pyridine-2,3-dicarboximide, each optionally substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 -alkenyl groups, nitro groups or carboxy groups; or represents a 6-membered cyclic imide which is a glutarimide, 3,3-tetramethylene glutarimide, 1,8-naphthalene dicarboximide or perylene-1,12-dicarboximide, each optionally substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 -alkenyl groups, nitro groups or carboxy groups; or represents a 7-membered cyclic imide which is an adipimide or diphenic imide, each optionally substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 -alkenyl groups, nitro groups or carboxy groups.

Claim 13

A method of imparting heat stability to a pigment in a pigmented thermoplastic resin, which comprises incorporating into a resin a metal phthalocyanine pigment, susceptible to degradation by heat, and, as heat stabilizer for said metal phthalocyanine pigment, 0.5 to 30% by weight, based on the weight of said metal phthalocyanine pigment, of a sulphonated imidomethyl phthalocyanine of formula I ##STR12## wherein Pc is a phthalocyanine residue optionally substituted by up to 4 chlorine or bromine atoms; M is hydrogen or a metal capable of forming a metal phthalocyanine; m is a value within the range of from 0.05 to 1.0; n is a value within the range of from 0.1 to 4.0; and X together with the group ##STR13## represents a 5-membered cyclic imide which is a succinimide, maleimide, itaconimide, phthalimide, tetrahydrophthalimide, cis-5-norbornene-endo-2,3-dicarboximide, 3,6-endoxo-1,2,3,6-tetrahydrophthalimide, 1,2- or 2,3-naphthalene dicarboximide or pyridine-2,3-dicarboximide, each optionally substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 -alkenyl groups, nitro groups or carboxy groups; or represents a 6-membered cyclic imide which is a glutarimide, 3,3-tetramethylene glutarimide, 1,8-naphthalene dicarboximide or perylene-1,12-dicarboximide, each optionally substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 alkenyl groups, nitro groups or carboxy groups; or represents a 7-membered cyclic imide which is an adipimide or diphenic imide, each substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 -alkenyl groups, nitro .roups or carboxy groups.

Claim 14

A method of imparting heat stability to a pigment in a pigmented thermoplastic resin, which comprises incorporating into a resin a metal phthalocyanine pigment, susceptible to degradation by heat, and, as heat stabilizer for said metal phthalocyanine pigment, 0.5 to 30% by weight, based on the weight of said metal phthalocyanine pigment, of a sulphonated imidomethyl phthalocyanine of formula I ##STR12## wherein Pc is a phthalocyanine residue optionally substituted by up to 4 chlorine or bromine atoms; M is hydrogen or a metal capable of forming a metal phthalocyanine; m is a value within the range of from 0.05 to 1.0; n is a value within the range of from 0.1 to 4.0; and X together with the group ##STR13## represents a 5-membered cyclic imide which is a succinimide, maleimide, itaconimide, phthalimide, tetrahydrophthalimide, cis-5-norbornene-endo-2,3-dicarboximide, 3,6-endoxo-1,2,3,6-tetrahydrophthalimide, 1,2- or 2,3-naphthalene dicarboximide or pyridine-2,3-dicarboximide, each optionally substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 -alkenyl groups, nitro groups or carboxy groups; or represents a 6-membered cyclic imide which is a glutarimide, 3,3-tetramethylene glutarimide, 1,8-naphthalene dicarboximide or perylene-1,12-dicarboximide, each optionally substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 alkenyl groups, nitro groups or carboxy groups; or represents a 7-membered cyclic imide which is an adipimide or diphenic imide, each substituted with one or more halogen atoms, C 1 -C 20 -alkyl groups, C 3 -C 20 -alkenyl groups, nitro .roups or carboxy groups.