Sumitomo Chemical Company, Limited

Tetsuo Okaniwa

Sadaharu Abeta

Hirohito Kenmochi

Kiyoyasu Hashimoto

Kazuyoshi Hirabayashi

Masaaki Ohkawa

Seizo Konishi

Kenji Yoshinaga

Yoshiro Takeda

A disperse dye of the formula, ##STR1## wherein R.sub.1 is an alkyl group having 5 to 6 carbon atoms, R.sub.2 is an alkyl group having 5 to 6 carbon atoms, a cyano-ethyl group, R.sub.3 is a hydrogen atom or a lower alkyl, amino or phenyl group, and Y.sub.1 and Y.sub.2 represent independently a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group, a cyano group, a thiocyanate group or an alkylsulfonyl group, provided that both Y.sub.1 and Y.sub.2 are not hydrogen at the same time and Y.sub.1 is located at the 4- or 5-position, which is useful for dyeing hydrophobic fibers in brilliant red to violet shade with good fastnesses.

Monoazo dyestuffs derived from benzothiazole

A compound of the formula (I): ##SPC1## wherein

Naphthostyril cationic dyes

A process to dye acid modified polyester fibers, such as Dacron T-64 fibers, a dischargeable black by dyeing the fibers with a mixture of six different basic dyes.

Dischargeable black dyeing on acid modified polyester fiber

Basic dyeable polyester fibers are dyed with a mixture of dyes, the first of which is a quaternized-2-methylene indoline coupled to a substituted aminobenzene to form a hydrazide dye, the second of which is a quaternized amino triazol azo coupled to substituted diaminobenzene. The third dye is a quaternized alkoxybenzothiazol azo coupled to a substituted Di-Aminobenzene. The fourth dye is a substituted diaminotriphenyl methane dye and the last dye is a Nitrobenzeneazo-substituted aminobenzene.

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Minoo, Japan

Tetsuo Okaniwa