07-12-2017 дата публикации
Номер: US20170349752A1
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 colorings with improved light fastness and improved thermostability. 2. The methine dye as claimed in claim 1 , wherein:{'sup': '4', 'sub': 1', '4, 'Ris straight-chain or branched C-C-alkyl or phenyl,'}{'sup': 5', '6, 'sub': 1', '4, 'Rand Rare each independently straight-chain or branched C-C-alkyl,'}{'sup': '7', 'sub': 1', '4, 'Ris straight-chain or branched C-C-alkyl, and'}{'sup': '8', 'sub': 1', '4, 'Ris straight-chain or branched C-C-alkyl.'}3. The methine dye as claimed in claim 1 , wherein:{'sup': '1', 'sub': '3', 'Ris hydrogen, fluorine, chlorine, COOH or COOCH,'}{'sup': '2', 'sub': '3', 'Ris hydrogen, fluorine, chlorine, CF, or CN,'}{'sup': '3', 'sub': '3', 'Ris hydrogen, chlorine, COOCHor CN,'}{'sup': '4', 'Ris methyl or phenyl, and'}{'sup': 5', '6, 'Rand Rare methyl.'}4. The methine dye as claimed in claim 1 , wherein for formula (I):{'sup': 1', '2', '3', '4', '5', '6, 'sub': 3', '3', '3, 'Ris —COOCH, Rand Rare Cl, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '4', '5', '6, 'sub': 3', '3', '3, 'Ris —COOCH, Ris H, Ris Cl, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '4', '5', '6, 'sub': 3', '3', '3, 'Ris —COOCH, Ris Cl, Ris H, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '4', '5', '6, 'sub': 3', '3', '3', '3, 'Ris —COOCH, Ris H, Ris —COOCH, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '4', '5', '6, 'sub': 3', '3', '3, 'Ris —COOCH, Ris H, Ris CN, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '4', '5', '6, 'sub': 3', '3', '3, 'Ris —COOCH, Ris F, Ris H, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '3', '4', '5', '6, 'sub': 3', '3', '3, 'Ris —COOCH, Ris CF, Ris H, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '4', '5', '6, 'sub': 3', '3, 'Ris —Cl, Rand Rare Cl, Ris —CH, and Rand Rare —CH, or'}{'sup': 1', '2', '3', '4', '5', '6, 'sub ...
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