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:
Oct. 20, 2020
Filed:
Oct. 09, 2018
Applicant:
Lanxess Deutschland Gmbh, Cologne, DE;
Inventors:
Assignee:
LANXESS Deutschland GmbH, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 403/06 (2006.01); C09B 23/10 (2006.01); C08K 5/3462 (2006.01); C08J 3/12 (2006.01); C08J 3/20 (2006.01); D01F 1/06 (2006.01); C08K 5/00 (2006.01);
U.S. Cl.
CPC ...
C09B 23/105 (2013.01); C08J 3/12 (2013.01); C08J 3/20 (2013.01); C08K 5/3462 (2013.01); C07D 403/06 (2013.01); C08J 2333/12 (2013.01); C08J 2377/00 (2013.01); C08K 5/0041 (2013.01); D01F 1/06 (2013.01);
Abstract
The present invention relates to novel methine dyes, methods for the preparation thereof and use thereof for dyeing plastics, especially polyamides, so as to obtain yellow to orange colourings with improved light fastness and improved thermal stability. Methine dyes for example accord to the formula (I) in which Ris hydrogen, halogen, alkyl, COOH or COOR, Ris oxygen or sulfur, Ris hydrogen, halogen, COOH, COORor CN, Ris alkyl or phenyl, Rand Rare each independently alkyl, Rand Rare each independently hydrogen, halogen, alkyl or COOR, and R, Rand Rare each independently alkyl.