Pigment compositions
AssigneeCiba-Geigy Corporation
InventorFridolin Babler
Life of this patent
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Abstract
The disclosure describes pigment compositions containing an organic pigment and a transparent filler having a mean particle size less than 10 .mu.m and a narrow particle size distribution; as well as methods of preparing the pigment compositions. The pigment compositions are useful for pigmenting high-molecular-weight organic materials; especially coating compositions, curable ink systems, plastics, as well as for use in laser marking applications.
Claims29
A pigment composition comprising a physical mixture of from 1 to 35 parts by weight of a filler and from 65 to 99 parts by weight of an organic pigment, wherein the filler has a mean particle size smaller than 10 .mu.m, and a narrow particle size distribution wherein at least 75 percent of the filler particles are smaller than 15 .mu.m;
- wherein the sum of the parts by weight of the filler and the organic pigment is 100, wherein said composition is capable of being uniformly dispersed in a high molecular weight organic material without a dispersion milling step.
Dependencies are inferred from the claim text.