Patent ID: 8664371
Filing Date: 2014-03-04
Classification: C09B,D06P

Abstract:
1. A method of preparing a rinsable dye comprising the following steps: (a) providing a primary aryl amine containing an aryl group, wherein directly attached to the aryl group are one or more substituent acidic ionic or salt groups that are solubilizing groups: (b) converting the primary aryl amine to a diazonium salt; (c) coupling the diazonium salt to a polyalkyleneoxylated aryl amine to which are attached one or more polymeric or copolymeric alkyleneoxy chains to form a polyalkyleneoxylated azo compound; and (d) capping one or more of the solubilizing groups with basic ionic or salt groups to form one or more capped solubilizing groups, wherein the acidic ionic or salt group in one or more of the capped solubilizing groups comprises a sulfonic group (SO