Patent · US Expired

Process for the printing with developing dyes

US4094637A · kind A · utility

5Cited by

9References

10Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Erich Feess · Hofheim, DE
Willy Gronen
Hasso Hertel

Key dates

Filing date	Oct 17, 1975
Grant date	Jun 13, 1978
Priority date	—
Expiry date	Oct 17, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S534/01
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Cellulosic material is printed with a paste containing the alkaline solution of a coupler, the dispersion of a diazotable aromatic amine, a nitrite and a thickener and the dyestuff is developed on the fiber by acidic steaming or by adding solutions of organic acids and steaming or drying.

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