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:
Apr. 17, 1979
Filed:
Sep. 12, 1973
Heinrich Frolich, Kelkheim, DE;
Joachim Ribka, Offenbach, DE;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
Water insoluble yellow monoazo dyestuffs of the general formula 1 ##STR1## in which R.sub.1 represents alkyl, cycloalkyl or aralkyl, X represents a carboxylic acid ester or a carboxylic acid amide, and Y.sub.1 and Y.sub.2 represent hydrogen, chlorine or bromine, alkyl or alkoxy, and method for their preparation. The dyestuffs are valuable pigments, which may be used for dyeing lacquers, lacquer forming agents, natural or synthetic resins and polymers and for printing textile fibrous materials or paper. They are distinguished by good rheological properties and they are fast to light, weather and migration. Moreover, they are resistant to heat and show color intensity and pure shades.