Method of making pigment concentrate particles and product of same

A method of making pigment concentrate particles having pigment uniformly dispersed in a polymer and exhibiting a controlled morphology and narrow particle size distribution. The method involves dispersing pigment particles in a pigment dispersant liquid to form a first dispersion phase; blending th...

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Bibliographic Details
Main Authors BERMEL; ALEXANDRA D, LOFFTUS; KEVIN D
Format Patent
LanguageEnglish
Published 13.05.1997
Edition6
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:A method of making pigment concentrate particles having pigment uniformly dispersed in a polymer and exhibiting a controlled morphology and narrow particle size distribution. The method involves dispersing pigment particles in a pigment dispersant liquid to form a first dispersion phase; blending the first dispersion phase with a binder to produce a second dispersion phase; mixing the second dispersion phase under sufficient shear to produce a suspension of small dispersion phase droplets in an immiscible suspending liquid; allowing the small dispersion phase droplets in the suspension to coalesce to a larger size at which substantially no further coalescence can occur; mixing the suspension of coalesced droplets with an extracting liquid to remove the pigment dispersant liquid from the coalesced droplets; and isolating the resulting pigment concentrate particles.
Bibliography:Application Number: US19950381385