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. 01, 1977
Filed:
Dec. 08, 1975
Peter Mischke, Neuenhain, Taunus, DT;
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Abstract
Novel azo dyestuffs -- being water-soluble only in traces -- containing in the coupling component the grouping of the formula ##STR1## in which R represents hydrogen, lower alkyl, lower alkylene-O-CO-lower-alkyl, lower alkylene-COO-lower alkyl, cyano-lower alkyl, chloro-lower alkyl, benzyl or cyclohexyl, R.sub.1 represents hydrogen, alkyl of from 3 to about 14 carbon atoms, cyanoethyl, hydroxyethyl, acetoxyethyl or benzyl, and R.sub.2 represents alkyl of from 3 to about 14 carbon atoms, benzyl, phenylethyl, cyclohexyl, phenyl, methylphenyl, ethylphenyl, methoxyphenyl, ethoxyphenyl, nitrophenyl, chlorophenyl or bromophenyl, or R.sub.1 and R.sub.2 together with the nitrogen atom morpholinyl or piperidyl, said dyestuffs being suitable for the dyeing or printing of synthetic fibrous materials, especially consisting of linear polyesters, the dyeings or prints obtained on said materials being distinguished particularly by an excellent fastness to thermofixation.