Methine dyes for paper and amonically-modified fibers

Details Methine dyes for paper and amonically-modified fibers Methine dyes for paper and amonically-modified fibers

1979-06-21

1981-03-17

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

8655, 542402, 542476, 546255, 546256, D21H 146, C07D21304

Patent

active

042564581

ABSTRACT:
Methine dyes of the general formula ##STR1## where the groups A are identical or different aryl or hetaryl, A.sup..crclbar. is an anion, R is hydrogen, methyl or ethyl and X is a bridge member, and the methine groups are in the .alpha.- or .gamma.-position. The compounds are preferably used for dyeing paper.

REFERENCES:
patent: 2461137 (1949-02-01), Brooker
patent: 2465412 (1949-03-01), Wilson
patent: 3567453 (1971-03-01), Borden
patent: 4053606 (1977-10-01), Shen et al.

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