Pigment composition useful as a coloring filler in polymeric or elastomeric materials comprises a dye immobilized on silica particles

摘要

Pigment composition comprising a dye immobilized on silica particles is new. The composition has high dispersibility in aqueous media or has a median particle diameter after sonication of 0.1-9 micro m. Independent claims are also included for: (1) production of the pigment composition by contacting silica particles with a coupling agent and reacting a dye with the coupling agent; and (2) a colored polymeric or elastomeric material produced using the pigment composition.