Process for preparation of black coloring materials and applicat

Details Process for preparation of black coloring materials and applicat Process for preparation of black coloring materials and applicat

1991-12-13

1993-09-14

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Process of extracting or purifying of natural dye

8561, 8623, 8646, 536 20, C09B 6100, C09B 6702, D06P 134

Patent

active

052444694

ABSTRACT:
A novel black coloring material is obtained by treating a chitosan with a dyestuff of the lithospermum root. If a water-insoluble chitosan is used as the chitosan, a finely divided black coloring material is obtained, and if a gelatinous chitosan salt is used as the chitosan, a gelatinous black coloring material is obtained. If a water-soluble chitosan, chitosan oligosaccharide or D-glucosamine, or a salt thereof is used as the chitosan, a liquid black coloring material is obtained. If a powdery polymeric substance is treated with such a black coloring material, a polymer-based black coloring material is obtained, and if a fiber is dyed with such a black coloring material, the fiber is dyed to a black color having a low lightness.

REFERENCES:
patent: 4603048 (1986-07-01), Konrad et al.
patent: 4853429 (1989-08-01), Sannan et al.
patent: 4881343 (1989-11-01), Sannan et al.
WPIL Abstract for Japanese Patent Publication 1294741 Published: Nov. 28, 1989.
Patent Abstracts of Japan for Japanese Patent Publication 1234476 Published: Sep. 19, 1989.
Patent Abstracts of Japan for Japanese Patent Publication 5910507 Published: Jan. 20, 1984.
WPI Abstract for Japanese Patent Publication 52094432 Published: Jan. 31, 1976.
WPIL Abstract for Japanese Patent Publication 1215861 Published: Aug. 29, 1989.

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