Process for the preparation of pigmentary particles coated with

Details Process for the preparation of pigmentary particles coated with Process for the preparation of pigmentary particles coated with

1974-06-11

1976-11-09

Garvin, Patrick P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106308Q, 106309, 427221, 428500, 260 4221, C09C 310, C08L 2300

Patent

active

039910075

ABSTRACT:
A process for the preparation of pigmentary compositions which comprises coating the particles of pigment by means of a polymer or copolymer, by covering by the polymerisation or copolymerisation "in situ" of at least one ethylenically unsaturated monomer having at least one polymerisable double bond and containing at least three carbon atoms or at least two carbon atoms and a heteroatom and/or a halogen atom attached to one of the carbon atoms wherein the polymerisation or copolymerisation reaction is effected in a medium comprising at least one organic solvent in which the monomer is soluble, and in the presence of at least one polymerisation catalyst soluble in this medium, the monomer and the proportion thereof being selected so that the polymer or copolymer formed is insoluble in the organic solvent used, the ratio by weight of pigment to resin being from 10/90 to 95/5 and the amount of catalyst being from 0.1 to 10% with respect to the weight of the monomer to be polymerised; and pigmentary compositions obtained by this process.

REFERENCES:
patent: 3519593 (1970-07-01), Bolger
patent: 3590018 (1971-06-01), Gebara
patent: 3661620 (1972-05-01), Dehking
patent: 3773708 (1973-11-01), Takahashi et al.
patent: 3826670 (1974-07-01), Rees

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