Process for the preparation of dyestuff formulations

US4295849A · kind A · utility

Inventors

• Konrad Nonn
• Karlheinz Wolf · Leverkusen, DE
• Artur Haus · Leverkusen, DE
• Reinhold Hornle

Key dates

• Filing date: Mar 9, 1977
• Grant date: Oct 20, 1981
• Expiry date: Mar 9, 1997

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P5/004
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to the preparation of pulverulent formulations of transfer printing dyestuffs. The process is characterized in that the aqueous dispersions of these dyestuffs are mixed with compounds of the formula EQU R--Z wherein PA1 R denotes a hydrophobic radical with at least 5 C atoms and PA1 Z denotes the groups --COOH, --NH.sub.2, --O(C.sub.2 H.sub.4 O).sub.n H, --NX.sub.1 X.sub.2 or --NH(CH.sub.2).sub.m NX.sub.1 X.sub.2, in which PA1 n is 0, 1 or 2, PA1 m is 2-6 and PA1 X.sub.1 /X.sub.2 is H or C.sub.1 -C.sub.4 -alkyl, PA1 with the proviso that R represents a non-cyclic aliphatic radical when Z represents COOH, and the aqueous mixtures are converted into dry pulverulent form in a manner which is in itself known. The preparation can easily be dispersed in organic media, for example in organic solvents such as those customary in the preparation of printing pastes, and are outstandingly suitable for the preparation of printing inks for printing temporary supports for heat transfer printing.