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US 7,503,973 B1Granted
Nanosized particles of benzimidazolone pigments
AssigneeXerox Corporation
InventorRina Carlini
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Abstract
A nanoscale pigment particle composition includes an organic benzimidazolone pigment, and a sterically bulky stabilizer compound, wherein the benzimidazolone pigment associates non-covalently with the sterically bulky stabilizer compound; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.
Claims25
A nanoscale pigment particle composition, comprising:
- a benzimidazolone pigment, and
- a sterically bulky stabilizer compound associated non-covalently with the benzimidazolone pigment;
- wherein presence of the stabilizer limits an extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.
A process for preparing nanoscale particles of benzimidazolone pigments, comprising:
- providing one or more organic pigment precursors to a benzimidazolone pigment comprising a benzimidazolone moiety,
- providing a solution or suspension of a sterically bulky stabilizer compound that associates non-covalently with the benzimidazolone moiety on one of the pigment precursors, and
- carrying out a chemical coupling reaction to form a benzimidazolone pigment composition comprising nanoscale-sized pigment particles, whereby the pigment precursors are incorporated with the benzimidazolone pigment and one or more functional moieties on the benzimidazolone pigment is non-covalently associated with the steric stabilizer, so as to limit an extent of particle growth and aggregation.
Dependencies are inferred from the claim text.