1:2 cobalt complex disazo dyestuffs, process for their...

Details 1:2 cobalt complex disazo dyestuffs, process for their... 1:2 cobalt complex disazo dyestuffs, process for their...

C - Chemistry, Metallurgy

09

B

260/161.3, 8/21.

C09B 45/30 (2006.01) C09B 62/515 (2006.01) D06P 1/10 (2006.01) D06P 3/24 (2006.01)

Patent

CA 1088052

Abstract of the disclosure: Novel, valuable 1:2-cobalt complex dyestuffs of the disazo compound of formula (1) Image (1) had been found, in which R1 is hydrogen, halogen, nitro, lower alkyl or lower alkoxy, R2 is hydrogen, lower alkyl or lower alkoxy, R3 is hydrogen, lower alkyl or lower alkoxy, X is hydroxy or .beta.-sulfoethyl or a group of the formula Image wherein R4 is hydrogen or lower alkyl. The novel dyestuffs are well suitable for the dyeing of natural and synthetic polyamide fibres, especially in admixture with hydrophobic fibres, and also especially advantageously with other 1:2- chromium or 1:2 cobalt complex dyestuffs containing one or two sulfonic cold groups per dyestuff molecule, and yield even, strong dyeings o; high fastness to wet processing and to use as well as to light. - The novel cobalt complex dyestuff can be prepared by cobalting the above disazo compound (1) by means of a cobalt yielding agent.

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