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:
May. 10, 1977
Filed:
Feb. 11, 1971
Bayer Aktiengesellschaft, Leverkusen, DT;
Abstract
Disazo dyestuff which in the form of the free acid correspond to the formula ##STR1## in which W stands for the radical ##STR2## or the radical ##STR3## R.sub.1 stands for hydrogen, an alkyl radical or a phenyl group; R.sub.2 and R.sub.3, independently of one another, stand for hydrogen, halogen, an alkyl group, an alkoxy group or an acylamino group; R.sub.4 stands for hydrogen, halogen, an alkyl group, an alkoxy group or an acylamino group; R.sub.5 stands for hydrogen, an alkyl group or an alkoxy group; R.sub.6 and R.sub.7, independently of one another, stand for hydrogen, hydroxy, cyano, halogen, acyloxy, alkoxycarbonyl or phenyl; X stands for an alkylene radical with 1 - 4 carbon atoms; R.sub.8 stands for an alkyl, phenyl, 2-naphthyl or 4-biphenyl group which is not further substituted; R.sub.9 stands for hydrogen or an alkyl group with 1 - 6 carbon atoms which may be substituted by a nitrile, carboxamide or carboxyl group; R.sub.10 stands for a substituent; and n stands for the numbers 0 - 2. This dyestuff is suitable for dyeing synthetic fibers, especially polyamide fibers, with very good fastness to light.