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:
Sep. 06, 1977
Filed:
Aug. 14, 1975
Applicant:
Inventors:
Rudolf Mory, Dornach, CH;
Rolf Muller, Aesch, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ;
U.S. Cl.
CPC ...
260174 ; 260184 ; 260195 ; 260202 ; 260208 ;
Abstract
Disazo pigments of the formula ##STR1## wherein R.sub.1 is 2-nitro-5-chlorophenyl or 1-nitronaphthyl-2, R.sub.2 is naphthalene in which the azo, hydroxyl and --CO--group are in the 1,2,3-position and R.sub.4 is a phenylene or naphthalene group are prepared. The disazo pigments may be used for pigmenting high molecular organic materials such as cellulose ethers, polyamides, polyurethanes and acrylic. The pigments have very good fastness to migration, heat and to light.