Patent · US Active

Methine dyes

US10808129B2 · kind B2 · utility

0Cited by

6References

4Claims

0Family size

Assignee

LANXESS Deutschland GmbH · DE

Inventors

Hans-Ulrich Borst · Elsdorf, DE
Stephan Michaelis · Leverkusen, DE
Frank Linke · Recklinghausen, DE

Key dates

Filing date	Oct 9, 2018
Grant date	Oct 20, 2020
Priority date	—
Expiry date	Oct 9, 2038

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01F1/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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 whichR1 is hydrogen, halogen, alkyl, COOH or COOR9,R2 is oxygen or sulfur,R3 is hydrogen, halogen, COOH, COOR10 or CN,R4 is alkyl or phenyl,R5 and R6 are each independently alkyl,R7 and R8 are each independently hydrogen, halogen, alkyl or COOR11, andR9, R10 and R11 are each independently alkyl.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.