Process for the preparation of pigment compositions for the dope

Details Process for the preparation of pigment compositions for the dope Process for the preparation of pigment compositions for the dope

1974-02-13

1976-06-01

Derrington, James H.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106309, 260 296AN, 260 296AB, 260 4221, 260 4248, 260 4255, C09C 310

Patent

active

039605914

ABSTRACT:
A pigment composition for the dyeing of polyacrylonitrile polymers and copolymers prepared by adding a polyacrylonitrile polymer or copolymer as a support in the preparation of formation of the pigment and working up the pigment in usual manner.
As support material there are suitable as well pure polyacrylonitrile as copolymers containing, in addition to acrylonitrile, one or more other copolymerizable monoolefinic monomers.
The amount of support material to be added ranges from 20 to 80, preferably from 30 to 60% by weight, calculated on the finished composition. As pigments there may be used those which are prepared or formed in purely aqueous systems or in aqueous systems containing organic solvents, for example azo pigments or pigments of perylene tetracarboxylic acid or naphthalene tetracarboxylic acid, dioxazines, phthalocyanines, quinacridones, indigoids, anthraquinone dyestuffs, iron oxide and titanium dioxide.
The pulverulent compositions thus obtained are especially suitable for the dyeing of spinning solutions of polyacrylonitrile fibers and the modifications thereof. They may be dispersed by simply stirring them into an appropriate spinning solvent.

REFERENCES:
patent: 2309522 (1943-01-01), Marks
patent: 2480821 (1949-09-01), Connell
patent: 3190850 (1965-03-01), Burke
patent: 3194862 (1965-07-01), Coover
patent: 3361705 (1967-12-01), Kay
patent: 3632699 (1972-01-01), Wilson

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