Patent · US Expired

Process for printing with developing dyes which employs having ether substituents derived from glycols, polyglycols, or alkoxy derivatives thereof

US4195973A · kind A · utility

1Cited by

4References

5Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hasso Hertel
Horst Curtius · Kelkheim, DE
Erich Feess · Hofheim, DE
Paul Karacsonyi · Frankfurt am Main, DE

Key dates

Filing date	Nov 6, 1978
Grant date	Apr 1, 1980
Priority date	—
Expiry date	Nov 6, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B67/0079
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

o-Aminophenol ethers deriving from lower alkylene glycols, lower alkylene polyglycols and the corresponding mono-lower alkyl ethers which may be substituted in the phenyl nucleus by halogen or nitro, are useful as diazo components in the "all-in" printing process for preparing developing dyes on cellulose. In this process the printing paste contains the alkaline solution of the coupling component, a dispersion of the amine, sodium nitrite and a thickening composition and developing of the dye is brought about with acidic means, followed by or combined with a heat treatment.

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