Process of pigmenting polyamides

Details Process of pigmenting polyamides Process of pigmenting polyamides

1976-09-17

1977-06-21

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106308N, C08L 7700

Patent

active

040310604

ABSTRACT:
An aqueous dispersion of a pigment for use in a polymerization process to form a pigmented polyamide by addition of the dispersion to the polymer-forming reactants prior to completion of the polymerization is prepared by attrition milling a slurry containing about 70 to 80% by weight of pigment in water in the presence of a dispersing agent to separate agglomerated pigment particles, then with additional milling, mixing the milled slurry with a concentrated aqueous solution of a nylon salt to flocculate the pigment particles and to form a flocculated dispersion containing 25 to 45% pigment.

REFERENCES:
patent: 3522209 (1970-07-01), Lee
patent: 3533984 (1970-10-01), Yamamoto et al.
patent: 3809670 (1974-05-01), Costain et al.
patent: 3824207 (1974-07-01), Carter

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