Patent No. U.S. 7,819,968 B2
Sun Chemical Corporation has obtained a patent for a dry colorant composition which is a combination of pigment, inert carrier and rheological additive having the structure: P—(U—Y)s. Wherein P is the residue of an organic colorant, Y is a polyalkylene oxide or polyalkylene moiety, U is a linking moiety covalently bonding Y to P, and s is an integer from 1 to 3, and wherein the combination is a dry solid composition