Patent · US Active

Yellow anionic disazo dyes

US8101731B2 · kind B2 · utility

0Cited by

12References

9Claims

0Family size

Assignee

Ciba Specialty Chemicals Corporation · US

Inventors

Michael Lennartz · Frankfurt, DE
Adolf Kaser · Bottmingen, CH
Sandra Weiss · Simmerath, DE

Key dates

Filing date	Mar 29, 2010
Grant date	Jan 24, 2012
Priority date	—
Expiry date	Mar 29, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S8/92
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper. The dyes are of formula (14), (15) or (16)in which

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