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:
Jan. 25, 1983
Filed:
Aug. 10, 1981
Applicant:
Inventors:
Paul Lienhard, Frenkendorf, CH;
Armand Roueche, Bottmingen, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
524100 ; 524606 ;
Abstract
The invention relates to a process for coloring polyamides in the melt with azo pigments of the formula ##STR1## wherein A is the radical of a diazo or tetraazo component, R.sub.1, R.sub.2 and R.sub.3 are hydrogen atoms or alkyl, cyclo alkyl, phenylalkyl or aryl radicals, and n is 1 or 2. Articles colored with the pigments have level, strong yellow shades of excellent fastness to light, wet processing, rubbing and thermofixation.