Patent · US Expired

Mixtures of optical brighteners and their use for the optical brightening

US4363744A · kind A · utility

5Cited by

7References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Dieter Gunther · Kelkheim, DE
Rudiger Erckel · Eppstein, DE
Gunter Rosch · Bad Soden am Taunus, DE
Heinz Probst · Pocking, DE

Key dates

Filing date	Mar 2, 1981
Grant date	Dec 14, 1982
Priority date	—
Expiry date	Mar 2, 2001

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD06L4/65
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Mixtures of optical brighteners consisting of from (a) 0.98 to 0.50 part by weight of a mixture consisting of from 0.05 to 0.95 part by weight of a brightener of the series of the benzoxazolyl-stilbenes and of from 0.95 to 0.05 part by weight of a brightener of the series of the aryltriazoles and (b) of from 0.02 to 0.5 part by weight of a brightener of the series of the bis-benzoxazolyl-stilbenes or of the bis-benzothiazolyl-stilbenes.

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