Patent · US Expired

Process for the after-bleaching of dyed raw cellulose using cationic compounds

US5372610A · kind A · utility

4Cited by

6References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Volker Kahle · Bensberg, DE
Klaus Kackstadter
Karl-Heinz Passon · Leverkusen, DE
Martin Riegels · Hilden, DE
Klaus Walz

Key dates

Filing date	Sep 3, 1992
Grant date	Dec 13, 1994
Priority date	—
Expiry date	Sep 3, 2012

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD06L4/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Dyed raw cellulose can be bleached in a bleaching and after-treatment bath containing, in addition to usual stabilizers, cationic-monomeric and/or polymeric compounds and, if desired, nonionic surfactants. Bleaching is carried out with the aid of aqueous-hydrogen peroxide. The stabilizers that can be used and the cationic compounds are defined in the specification. Nonionic tensides, if their co-use is desired, are those of the class polyglycolethers.

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