Azo dyes with an acetalized diazo component of the thiophene or

Details Azo dyes with an acetalized diazo component of the thiophene or Azo dyes with an acetalized diazo component of the thiophene or

1995-05-17

1996-03-26

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534753, 534588, 534887, C09B 6748, C09B 29033, C09B 2909, D06P 118

Patent

active

055021700

ABSTRACT:
Azo dyes of the formula ##STR1## where L.sup.1, L.sup.2, L.sup.3, L.sup.4, X and K are as defined in the specification, and crystal forms of thienylazobenzene dyes are useful for dyeing or printing textile materials such as polyesters, fibers or fabrics made of cellulose esters or polyamides or blend fabrics from polyester and cellulose fibers with high color strength, good fastness properties and brilliant hues.

REFERENCES:
patent: 4952681 (1990-08-01), Hansen et al.
patent: 5132411 (1992-07-01), Egli et al.
patent: 5352774 (1994-10-01), Hansen et al.

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