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:
Mar. 15, 1977
Filed:
Nov. 06, 1975
Allen Crabtree, Manchester, EN;
Imperial Chemical Industries Limited, London, EN;
Abstract
Reactive azine dyestuffs of the formula: ##STR1## wherein Am is selected from a group consisting of anilino, di(lower alkyl)amino and N(lower alkyl)benzylamino radicals, one of Y.sup.1 and Y.sup.2 is H or SO.sub.3 H and the other is H or an alkyl or alkoxy group of 1-4 carbon atoms, one of X.sup.1 or X.sup.2 is H, SO.sub.3 H, -SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H or --SO.sub.2 CH=CH.sub.2 and the other is H, an alkyl or alkoxy group of 1-4 carbon atoms, Cl or CO.sub.2 H, X.sup.3 is H, an alkyl group of 1-4 carbon atoms or SO.sub.3 H, when the dotted fused ring is present B is absent and when the dotted fused ring is absent B is H or an alkyl or alkoxy group of 1-4 carbon atoms, At least one of the pendant benzene nuclei contains a NHQ group where Q is a cellulose-reactive group except when X.sup.1 or X.sup.2 is --SO.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H or --SO.sub.2 CH=CH.sub.2 and the dyestuff as a whole contains at least 2 sulphonic acid groups. The products are reactive dyes for cellulose which are colored in strong bright blue or reddish-blue shades of excellent fastness to washing and of a reasonable fastness to light, especially in respect of wet fading.