Title: Polyester fibers dyed with a disazo disperse dyestuff

Abstract: Polyester fibers dyed with a disazo disperse dyestuff free from --SO.sub.3 H groups imparting solubility in water of the formula ##SPC1## in which X represents hydroxyl or amino, R.sub.1 and R.sub.2 each represents hydrogen, phenyl, C.sub.1 -C.sub.2 -alkyl, C.sub.1 -C.sub.2 -alkoxy, and, when X = OH, also C.sub.1 -C.sub.2 -alkoxycarbonyl or -CONH.sub.2, Z represents --O--, --S--, --NH--, cyclohexylidene, C.sub.1 -C.sub.2 -alkylene, --O--(C.sub.1 -C.sub.2 -alkylene)--O--, and R.sub.3 and R.sub.4 each represent hydrogen, C.sub.1 -C.sub.2 -alkyl, C.sub.1 -C.sub.2 -alkoxy or chlorine, and D.sub.1 and D.sub.2 are each a radical of a diazo component of the heterocyclic series are disclosed.

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Inventors: Ramanathan, Visvanathan (Basel, CH)

Application Number: 410746
Filing Date: 1973-10-29
Publication_date: 1976-05-04
Assignee: Ciba-Geigy AG (Basel, CH)
Primary Class(es): 8/687 8/657, 8/922, 534/555, 534/589, 534/603, 534/608, 534/609, 534/759, 548/365.1, 564/310, 564/314, 564/342, 564/441, 564/442
Other Classes:
US Patent Ref:

2936306	May, 1960	Schmid et al.	260/160.
3137687	Jun, 1964	Spoerri et al.	260/160.
3325468	Jun, 1967	Jung et al.	260/160.

Other Refs:
Primary Examiner: Higel, Floyd D.
Assistant Examiner:
Attorney: Kolodny; Joseph G., Roberts; Edward McC., Almaula; Pradodh I.