C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 57/00 (2006.01) C08K 5/00 (2006.01) C08K 5/315 (2006.01) C08K 5/375 (2006.01) C09B 23/14 (2006.01)
Patent
CA 2338126
A process for the bulk dyeing of plastics, characterized in that use is made of dyes of the formula (I) Image (I) where Y is a bivalent radical selected from the group consisting of substituted and unsubstituted arylenes and alkylenes, where the alkylene radicals may, if desired, have interruption by heteroatoms, such as O or S, R1 and R1', independently of one another, are an electron-withdrawing group, preferably cyano or alkoxycarbonyl, in particular C1-C4-alkoxy- carbonyl, R2, R2', R3 and R3', independently of one another are hydrogen, alkyl, in particular C1-C4-alkyl, CF3 or halogen, preferably F or Cl, R4 and R4', independently of one another, are unsubstituted or substituted alkyl, preferably C1-C6-alkyl, or C7-C12-aralkyl, in particular benzyl.
Michaelis Stephan
Stawitz Josef-Walter
Aktiengesellschaft Bayer
Fetherstonhaugh & Co.
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