The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2015
Filed:
Nov. 30, 2012
Applicant:
Dalian University of Technology, Dalian, Liaoning, CN;
Inventors:
Assignee:
Dalian University of Technology, Dalian, Liaoning, CN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D 251/50 (2006.01); C07D 251/44 (2006.01); C07D 251/38 (2006.01); C09B 49/00 (2006.01); D06P 1/30 (2006.01);
U.S. Cl.
CPC ...
C07D 251/50 (2013.01); C07D 251/38 (2013.01); C07D 251/44 (2013.01); C09B 49/00 (2013.01); D06P 1/30 (2013.01);
Abstract
The present invention provides a group of water-soluble sulfur dye having carboxyl groups. For the kind of dye, a sulfur dye is first reduced to a leuco compound by sodium sulfide, and the leuco compound reacts with an active compound containing carboxyl groups to obtain a water-soluble sulfur dye containing the carboxyl group. The water-soluble sulfur dye provided by the present invention is applicable to dying of cotton, wool, silk, and leather. Being both water-soluble and carboxyl group reactive, the product has a simple application process and desirable color fastness, thereby having broad application prospects.