Process for preparing fine pigment dispersions
AssigneeCiba Specialty Chemicals Corporation
InventorsWerner Sieber, Veronique Hall-Goulle
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Abstract
Preparation of pigment dispersions by a1) subjecting a mixture A comprising a latent pigment and a polymer to thermal, chemical or photolytic treatment and b) then adding a solvent, or a2) subjecting a mixture B comprising a latent pigment, a polymer and a solvent to thermal, chemical or photolytic treatment, new pigment dispersions and new latent pigments, their use in the process according to the invention for preparing the fine pigment dispersions and the use of the dispersions according to the invention for pigmenting high molecular mass material, including color filters.
Claims2
Process for preparing pigment dispersions, characterized by
- c1) preparing a mixture comprising a latent pigment, a polymer and a solvent,
- c2) subsequently removing the solvent from the resulting mixture, and
- c3) then subjecting the solvent-free mixture A to thermal, chemical or photolytic treatment, and
- c4) then adding a solvent to the treated mixture.
Process for preparing pigment dispersions, characterized by
- d1) preparing a mixture B comprising a latent pigment, a polymer and solvent, and
- d2) subsequently removing some of the solvent from the resulting mixture, and
- d3) then subjecting the resulting mixture to thermal, chemical or photolytic treatment.
Dependencies are inferred from the claim text.