Azoic dyes insoluble in water

Details Azoic dyes insoluble in water Azoic dyes insoluble in water

C - Chemistry, Metallurgy

09

B

260/164, 260/175

C09B 29/00 (2006.01) C09B 29/08 (2006.01) C09B 31/02 (2006.01) C09B 31/047 (2006.01) C09B 33/02 (2006.01) C09B 62/473 (2006.01)

Patent

CA 1038862

ABSTRACT OF THE DISCLOSURE: Azoic dyes fre of sulphonic groups and having the following general formula: Image wherein R and R1 are the same or different and each represents hydrogen, a C1-C4 alkyl group, a C1-C4 alkoxyl group, a halogen, a nitro group, a cyano group, a -SO2CH3 group, a sulphamidic group, a -NHCOZ group wherein Z is a C1-C4 alkyl group, or a phenylazo group which may be substituted in the phenyl ring by a C1-C4 ? ?yl group, with the proviso that when one of the radicals R and R1 is a halogen, the other cannot represent a cyano group; R2 is hydrogen or a C1-C4 alkonyl group; R3 and R4 are the same or different and each represents a C1-C4 alkyl group, a C1-C4 cyanalkyl group, a C1-C4 hydroxyalkyl group, a C1-C4 alkoxyalkyl group, a C1-C4 acyloxyalkyl group or a carboxyester group having a C1-C4 aliphatic chain; X is a linear or branched aliphatic or cycloaliphatic chain containing from 1 to 6 carbon atoms, which may be saturated or contain a double bond; and n is 1 or 2. These dyes show a high dyeing power for fibers of cellulosic esters and ethers, for synthetic polyamidic fibers and for fibers derived from terephthalic esters; moreover, they have a high resistance to wet treatments and a remarkable quality especially for materials such as polyamidic fibers, for which it is hard to find dyes that will simultaneously satisfy the requirement of covering up the roller streaks due to irregula- rities in the fiber itself.

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