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:
Jul. 20, 1982
Filed:
Aug. 04, 1980
Armand Roueche, Bottmingen, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
The present invention relates to valuable novel azo pigments of the formula ##STR1## wherein A is a benzene residue, X is a SO.sub.3 or CO.sub.2 group, Y is a substituent that does not confer solubility in water, M is a monovalent or bivalent metal atom, and n is 1 or 2. Examples of substituents that do not confer solubility in water are: halogen, e.g. chlorine or bromine, methyl, C.sub.1 -C.sub.4 alkoxy, cyano, alkanoylamino containing 1 to 4 carbon atoms, and especially nitro and trifluoromethyl. In addition to containing the specified substituents, the benzene residue A can contain further substituents, e.g. chlorine atoms or methyl groups. Suitable metals are monovalent metals such as alkali metals, e.g. Na, K or Li, but preferably bivalent metals such as Mg, Ca, Sr, Ba, Mn, Co, Ni, Cu or Zn. However, M can also comprises mixtures of such metals. The novel pigments produce in plastics materials yellow to red colorations of excellent fastness to light, migration and atmospheric influences and also excellent heat resistance.