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:
Aug. 17, 1976
Filed:
Sep. 17, 1974
Russell M Kullman, Metairie, LA (US);
Robert M Reinhardt, New Orleans, LA (US);
Abstract
The invention provides a cellulose-dyeing dyestuff having the formula ##EQU1## wherein Z is the chromophoric radical of a cellulose-dyeing dyestuff containing a vinyl sulfone group (--CH.sub.2 CH.sub.2 SO.sub.2 --), e.g. Cl Reactive Violet 4 and Cl Reactive Black 5; B is --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 CH.sub.2 --, or ##EQU2## A is --O-- or --S--; and X is --H, --CH.sub.2 OH, --CH.sub.2 OCH.sub.3, or ##EQU3## which dyestuff will dye a cellulosic material by heating in the presence of an acid catalyst. The cellulose-dyeing dyestuff of the invention is prepared by reacting a conventional cellulose-dyeing dyestuff having a chromophoric radical containing the aforesaid vinyl sulfone groups (e.g., Cl Reactive Black 5 and Cl Reactive Violet 4) with a hydroxy carbamate, and methylolating the resulting product. The utility of conventional cellulose-dyeing dyestuffs, which are normally reactive with cellulosic materials under alkaline conditions, is greatly extended by converting them to the methylolated derivatives of the invention, through prolonged shelf life and compatibility with selected acidic catalysts.