Anthraquinone dyestuff modification

Details Anthraquinone dyestuff modification Anthraquinone dyestuff modification

1982-03-24

1983-06-14

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

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

Olefin polymer substrate or rubber

8526, 8532, 8678, 8922, 260208, 260373, D06P 379

Patent

active

043880789

ABSTRACT:
The present invention is concerned with modifying the crystal form of the anthraquinone of the formula ##STR1## so as to render it more suitable for disperse dyeing and to improve its performance in thermosol dyeing. The modification is effected by heating the dyestuff at elevated temperatures, preferably between 90.degree. and 185.degree. C. until the Debye-Scherrer strong intensity spacings appear at 6.5A.degree., 18.1A.degree. and 20.6A.degree.. It is also concerned with disperse and thermosol dyeing processes utilizing this crystal modification and with aqueous dispersions of this crystal modification.

REFERENCES:
patent: 2007382 (1935-07-01), Ockman et al.
patent: 3467681 (1969-09-01), Hederich et al.
patent: 4074965 (1978-02-01), Kruse et al.
patent: 4319880 (1982-03-01), Opitz et al.
patent: 4327999 (1982-05-01), Koller et al.
patent: 4329144 (1982-05-01), Eugster et al.
patent: 4332588 (1982-06-01), Eugster et al.

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