Coated pigment and colorant composition

Compositions: coating or plastic – Coating or plastic compositions – Marking

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106 316, 106 3165, 106 3166, 106 3167, 106 3172, 106493, 106494, 106499, 106500, C09D 1100

Patent

active

057953767

ABSTRACT:
A coated pigment highly surface-modified with a substantially water-insoluble organic surface modifier, produced by preparing a mixture of water and a substantially water-insoluble organic surface modifier, pressurizing the mixture, introducing the mixture into a flow path having a diameter-decreased portion and a turning portion to cause a shear force in the mixture of which the flow is accelerated while the mixture is passing the diameter-decreased portion, mutual collision of the mixture of which the flow has been accelerated or collision of the mixture of which the flow has been accelerated against a wall constituting the flow path, thereby obtaining an aqueous dispersion in which the substantially water-insoluble organic surface modifier is homogeneously dispersed in the water, mixing the aqueous dispersion with the pigment to coat the pigment with the substantially water-insoluble organic surface modifier, and isolating the pigment coated with the substantially-water-insoluble organic surface modifier.

REFERENCES:
patent: 5366546 (1994-11-01), McCrae et al.
Dainippon Ink & Chem., Database WPI, Section Ch, week 9521, Derwent Publications Ltd., London GB, Class A25 AN95-157647 JP-A-06 279 561, Oct. 1994.

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