초록 ▼

Colorant clusters comprising an aggregation of a plurality of grains of sol-derived material and colorant. The clusters are particularly useful as pigments in liquid compositions, e.g., paints and inks, for forming coatings that are retroreflective immediately upon drying. Also, a process for prepar

Colorant clusters comprising an aggregation of a plurality of grains of sol-derived material and colorant. The clusters are particularly useful as pigments in liquid compositions, e.g., paints and inks, for forming coatings that are retroreflective immediately upon drying. Also, a process for preparing such colorant clusters comprising admixing colorant in a binder sol to yield a pigment sol and then removing liquid medium from the pigment sol to yield the clusters. Also, a coating composition comprising retroreflective elements, a vehicle, and the aforementioned colorant clusters. After application of the composition to a substrate, the resultant coating is immediately retroreflective upon drying.

대표청구항 ▼

A process for manufacturing colorant clusters comprising: a) providing a binder sol comprising a suspension of colloidal particles in a liquid medium, wherein the colloidal particles have an average diameter of about 360 nonometers or less; b) admixing colorant with said binder sol to yield a pigmen

A process for manufacturing colorant clusters comprising: a) providing a binder sol comprising a suspension of colloidal particles in a liquid medium, wherein the colloidal particles have an average diameter of about 360 nonometers or less; b) admixing colorant with said binder sol to yield a pigment sol; and c) removing said liquid; to yield colorant clusters which each comprise an aggregation of a plurality of grains of sol-derived material and colorant, wherein the average diameter of said clusters is up to about 200 microns.