Patent · US Active

Polycarboxylic acid dye with low polymerization degree

US9040634B2 · kind B2 · utility

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4References

5Claims

0Family size

Assignee

Dalian University of Technology · CN

Inventors

Shufen Zhang · 东风镇, CN
Bingtao Tang · 东风镇, CN
Wei Ma · Shanghai, CN

Key dates

Filing date	May 23, 2011
Grant date	May 26, 2015
Priority date	—
Expiry date	Jan 3, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B69/109
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present invention provides a polycarboxylic acid dye with low polymerization degree, which is formed by using a macromolecule skeleton of polymaleic acid linked to an azo chromophore, an azo-metal complexation chromophore or an anthraquinone chromophore via a bridge group of amide or ester bond. The dye is useful for dyeing and printing leather, protein fiber, cellulose fiber and synthetic fiber.

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