Patent · US Expired

Fiber-reactive monoazo and disazo dyes

US5432266A · kind A · utility

4Cited by

16References

16Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Karl-Josef Herd · Odenthal, DE
Peter Roschger · Ludwigshafen, DE

Key dates

Filing date	Apr 1, 1993
Grant date	Jul 11, 1995
Priority date	—
Expiry date	Apr 1, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B62/51
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Preparation of water-soluble reactive dyes containing vinylsulphonyl and .beta.-sulphatoethylsulphonyl groups by the oxidation of dyes containing .beta.-hydroxyethylmercapto radicals, and then sulphation and, if appropriate, conversion of the .beta.-sulphatoethylsulphonyl radical to the vinylsulphonyl radical with bases. Novel fiber-reactive monoazo or disazo dyes of the structure ##STR1## wherein the substituents have the formulae given in the description and a method of coloring polyurethane plastics using dyestuffs of the formula ##STR2## as well as novel monoazo dyestuffs of the formula ##STR3##

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.