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. 23, 1999
Filed:
May. 26, 1998
Applicant:
Inventors:
Peter Dilling, Mt. Pleasant, SC (US);
Gamini S Samaranayake, Mt. Pleasant, SC (US);
Assignee:
Westvaco Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
D06P / ;
U.S. Cl.
CPC ...
8554 ; 8557 ; 8905 ; 8912 ; 8662 ;
Abstract
Dyestuff compositions are provided which incorporate, as the grinding aid and/or dispersant therefor, amine modified lignin admixed with sulfonated lignin. The disclosed dyestuff compositions exhibit improved heat stability and, as a result of the higher activity of the dispersant mixture of amine modified lignin blended with sulfonated lignin, less dispersant is present in the exhaust liquor and waste treatment demands are thereby reduced. The improved package dyeing grinding aid/dispersant of the invention is prepared by mixing an amine modified lignin with a sulfonated lignin.