Leuco dye coating compositions

摘要

A process for making a leuco dye coating composition, comprising the steps of: A. blending a mixture of (a) a leuco Dye, (b) an antioxidant, (c) a Äpolypoly(ethyleneoxide)block-poly(propyleneoxide)Ü nonionic block copolymer surfactant, (d) an alkylarlyoxypoly(alkylene oxide) nonionic surfactant and (e) water; B. milling the blend prepared in step A to prepare a coating composition of the leuco dye in milling media; C. separating the dye coating composition from the milling media.