Process for the production of pigments useful for waxless carbon

Details Process for the production of pigments useful for waxless carbon Process for the production of pigments useful for waxless carbon

1975-02-28

1976-05-04

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106308N, 106308Q, 428411, 260 4216, 260 296HN, 260 342, 260 4254, C09C 148

Patent

active

039544958

ABSTRACT:
Pigment preparations containing carbon black, blue pigment and a wetting agent are prepared having an intimate inseparable mixture based on the total amount of pigment of 60-95 wt. % carbon black pigment and 40 to 5 wt. % blue pigment and based on 100 parts by weight of pigment, 0.5 to 3 parts weight of polyvinylpyrrolidone and 4 to 10 parts by weight of a cation active invert soap. The products are useful for pigmenting waxless carbon papers, typewriter tapes, printing inks and synthetic resins.

REFERENCES:
patent: 3088837 (1963-05-01), Prescott et al.
patent: 3749670 (1973-07-01), Ormsbee et al.
patent: 3904562 (1975-09-01), Hopfenberg

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