Patent · US Expired

Disazo dyes, and copper complexes thereof, for dyeing paper

US7078497B2 · kind B2 · utility

1Cited by

17References

16Claims

0Family size

Assignee

Ciba Specialty Chemicals Corporation · US

Inventors

Adolf Kaser · Bottmingen, CH
Holger Lautenbach · Weil am Rhein, DE

Key dates

Filing date	Dec 19, 2001
Grant date	Jul 18, 2006
Priority date	—
Expiry date	Oct 18, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S8/919
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The dyes of formula (1) according to claim 1 and the copper complexes of dyes of formula (2) according to claim 9 or the mixtures of mono-copper complex with the bis-copper complex are excellently suitable for dyeing paper with good light-fastness properties.

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