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US 2020/0109290 A1Published application
Novel methine dyes
AssigneeLANXESS Deutschland GmbH
InventorsSabine SCHMAUSER, SR., Frank LINKE, Hans-Ulrich BORST
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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.
Claims18
A dye of the formula (I)
- in which
- R1 is hydrogen, halogen, COOH or COOR11,
- R2 is hydrogen, halogen, COOH, COOR12 or CN,
- R3 is alkyl or phenyl,
- R4 and R5 are each independently alkyl,
- R6, R7, R8, R9 and R10 are each independently hydrogen, halogen, alkyl, alkoxy or COOR13, and
- R11, R12 and R13 are each independently alkyl.
4 more elements
Dependencies are inferred from the claim text.