Dyeing process and dyes
AssigneeZeneca Limited
InventorsMichael Gordon Hutchings, Colin Michael Brennan, Neil Anthony Tallant, Andrew Paul Shawcross, Prakash Patel, Warren James Ebenezer
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Abstract
A process for defining a substrate is provided. The process comprises applying to the substrate a water soluble dye having at least two electrophilic groups and a nucleophilic agent having a molecular weight below 600 and at least one group selected from aliphatic primary amino groups and secondary amino groups.
Claims10
A process for the coloration of a substrate comprising applying thereto a water-soluble dye having at least two electrophilic groups and a nucleophilic agent having a molecular weight below 600 and at least one group selected from thiols, thiones, aliphatic primary amino groups and aliphatic secondary amino groups, said dye being a dye of Formula (1) or a salt thereof:
- ##STR33## wherein:
- each Q.sup.1 independently is an electrophilic group selected from halogen, sulpho and quaternary amonium or a non-electrophilic group of formula --NR.sup.7 R.sup.8 and --OR.sup.7 wherein R.sup.8 is H or alkyl and R.sup.7 is H, optionally substituted alkyl or optionally substituted aryl;
- each T independently is --O--, --S-- or --NR.sup.a ;
- each L.sup.1 independently is a divalent organic linker group;
- each V.sup.1 independently is an electrophilic vinyl sulphone group, a group which is convertible to an electrophilic vinyl sulphone group on treatment with aqueous alkali or an electrophilic group of formula --SO.sub.2 NHCH.sub.2 CH.sub.2 --Y wherein Y is --OSO.sub.3 H, --SSO.sub.3 H, --Cl or --OCOCH.sub.3 ;
- each R.sup.a independently is H or optionally substituted alkyl;
- Z is an optionally substituted buta-1,3-dione phenylene, naphthylene or heterocyclic group;
- and
- m and n are each independently 0 or 1;
- and wherein the electrophilic groups in the water-soluble dye react with the thiol, thione, aliphatic primary amino group or aliphatic secondary amino group in nucleophilic agent.
A composition comprising:
- (i) a water-soluble dye having at least two electrophilic groups;
- and
- (ii) a nucleophilic agent having a molecular weight below 600 and at least one group selected from thiols, thiones, aliphatic primary amino groups and aliphatic secondary amino groups where said amino groups are optionally masked using a protecting group, said dye being a dye of Formula (1) or a salt thereof:
- ##STR34## wherein:
- each Q.sup.1 independently is an electrophilic group selected from halogen, sulpho and quaternary amonium or a non-electrophilic group of formula --NR.sup.7 R.sup.8 and --OR.sup.7 wherein R.sup.8 is H or alkyl and R.sup.7 is H, optionally substituted alkyl or optionally substituted aryl;
- each T independently is --O--, --S-- or --NR.sup.a ;
- each L.sup.1 independently is a divalent organic linker group;
- each V.sup.1 independently is an electrophilic vinyl sulphone group, a group which is convertible to an electrophilic vinyl sulphone group on treatment with aqueous alkali or an electrophilic group of formula --SO.sub.2 NHCH.sub.2 CH.sub.2 --Y wherein Y is --OSO.sub.3 H, --SSO.sub.3 H, --Cl or --OCOCH.sub.3 ;
- each R.sup.a independently is H or optionally substituted alkyl;
- Z is an optionally substituted buta-1,3-dione phenylene, naphthylene or heterocyclic group;
- and
- m and n are each independently 0 or 1.
A water-soluble dye of Formula (I) and salts thereof having at least two electrophilic groups:
- ##STR35## wherein:
- each Q.sup.1 independently is an electrophilic group selected from halogen, sulpho and quaternary amonium or a non-electrophilic group of formula --NR.sup.7 R.sup.8 and --OR.sup.7 wherein R.sup.8 is H or alkyl and R.sup.7 is H, optionally substituted alkyl or optionally substituted aryl;
- each T independently is --O--, --S-- or --NR.sup.a --;
- each L.sup.1 independently is a divalent organic linker group;
- each V.sup.1 independently is an electrophilic vinyl sulphone group, a group which is convertible to an electrophilic vinyl sulphone group on treatment with aqueous alkali or an electrophilic group of formula --SO.sub.2 NHCH.sub.2 CH.sub.2 --Y wherein Y is --OSO.sub.3 H, --SSO.sub.3 H, --Cl or --OCOCH.sub.3 ;
- each R.sup.a independently is H or optionally substituted alkyl;
- Z is an optionally substituted buta-1,3-dione phenylene, naphthylene or heterocyclic group;
- and
- m and n are each independently 0 or 1.
Dependencies are inferred from the claim text.