Process for the mass coloration of linear polyesters

Claim 2

A process for the mass coloration of a linear polyester by homogeneously mixing said polyester and a colorant which is a mixture consisting of (a) 0.05 to 0.35% by weight, based on the amount of polyester, of one thioindigo pigment, one dioxazine pigment or mixture of the two and (b) a polymer-soluble dye selected from the group consisting of anthraquinone, azo, azomethine, phthalocyanine, perinone, isondolinone, methine and triazine dyes.

Claim 3

A process according to claim 1 wherein the thioindigo pigment has the formula ##STR22## wherein V represents a sulfur atom or a --NH group, X and X 1 represent hydrogen or halogen atoms, alkyl or alkoxy groups of 1 to 4 carbon atoms, alkylsulfonyl groups of 1 to 4 carbon atoms or a phenoxy or phenylsulfonyl group which is unsubstituted or substituted by halogen atoms or alkyl or alkoxy groups of 1 to 4 carbon atoms, Y, Y 1 , Z and Z 1 represent hydrogen or halogen atoms or methyl groups, or wherein X and Y or X 1 and Y 1 form a fused benzene nucleus which can be substituted by halogen atoms or alkyl or alkoxy groups of 1 to 4 carbon atoms.

Claim 4

A process according to claim 1 wherein the thioindigo pigment is 4,4'-7,7'-tetrachlorothioindigo.

Claim 5

A process according to claim 1 wherein the thioindigo pigment is asymmetrical.

Claim 6

A process according to claim 1 wherein the dioxazine pigment has the formula ##STR23## wherein Q represents a chlorine or bromine atom, a phenoxy, phenylmercapto or benzoyl group which is unsubstituted or substituted by halogen or alkyl or alkoxy of 1 to 4 carbon atoms, or represents an alkoxycarbonyl group of 2 to 5 carbon atoms, Y 2 represents an alkoxy group of 1 to 12 carbon atoms, a cycloalkoxy group of 5 or 6 carbon atoms, a hydroxyalkoxy group of 2 to 6 carbon atoms, an alkoxyalkoxy or alkanoyloxyalkoxy group of 3 to 8 carbon atoms, a phenoxy group, a phenoxy(C 2 -C 6 )alkoxy group or benzoyloxy(C 2 -C 6 )alkoxy group, whilst the phenyl moieties of the last three substituents can contain halogen atoms or alkyl or alkoxy groups, or represents a naphthoxy- or tetrahydronaphthoxy group, or a naphthoxy(C 2 -C 6 )alkoxy group or a tetrahydronaphthoxy(C 2 -C 6 )alkoxy group, X 2 has the same meaning as Y 2 and can additionally represent a hydrogen or halogen atom, an alkanoylamino group of 2 to 6 carbon atoms, a benzoylamino group which is unsubstituted or substituted by halogen or alkyl or alkoxy of 1 to 6 carbon atoms, or represents a trifluoromethyl group, an alkylsulfonyl group of 1 to 6 carbon atoms, a phenyl, benzoyl or phenylmercapto group, X 3 represents a hydrogen or halogen atom, or wherein X 2 and X 3 form a fused benzene ring.

Claim 7

A process according to claim 1 wherein the a dioxazine pigment has the formula ##STR24##

Claim 8

A process according to claim 1 wherein the a dioxazine pigment has the formula ##STR25## wherein R represents an alkyl group of 1 to 6 carbon atoms or a phenyl radical which is unsubstituted or substituted by halogen or alkyl or alkoxy of 1 to 6 carbon atoms, and Y 3 represents an alkoxy group of 1 to 6 carbon atoms.

Claim 9

A process according to claim 1 wherein 0.10 to 0.25% of the thioindigo and/or dioxazine pigment is used.

Claim 10

A linear polyester containing 0.05 to 0.35% by weight of a thioindigo or dioxazine pigment and one or more polymer-soluble dyes according to claim 1.