Azulenesquaric acid dyes that contain urethane groups

Details Azulenesquaric acid dyes that contain urethane groups Azulenesquaric acid dyes that contain urethane groups

1989-05-02

1991-02-05

Higel, Floyd D.

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

Organic compounds

Carboxylic acid esters

560 26, 560115, 560162, 560166, 560168, 260404, 2604045, C07C27112, C07C27128, C07C27124, C09B 6900

Patent

active

049906496

ABSTRACT:
Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C.sub.1 -C.sub.12 -alkylene,

REFERENCES:
patent: 3894031 (1975-07-01), Hauck et al.
patent: 3984419 (1976-10-01), Hauck et al.
patent: 3992437 (1976-11-01), Shaw et al.
patent: 4675423 (1987-06-01), Schrott et al.
patent: 4806664 (1989-02-01), Schrott et al.
Angew. Chem. 78, p. 937, (1966), (Ziegenbein et al.).
Dyes and Pigments, vol. 8, pp. 381 to 388, (1987), (Kim et al.).

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