Patent ID: 8962522
Filing Date: 2015-02-24
Classification: B41M,C09B,C09D,C09K

Abstract:
1. A thermochromic color-memory microcapsule pigment comprising a thermochromic color-memory composition encapsulated therein, said composition comprising: (I) an electron donating coloring organic compound, (II) an electron accepting compound, and (III) an ester compound represented by the following formula (1) as a reaction medium which controls color reaction of the components (I) and (II): where in the formula, X represents any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and a halogen atom, m represents an integer of from 1 to 3, and n represents an integer of from 1 to 20; and wherein the component ratio among (I), (II) and (III) is such that component (II) is within the range of from 0.1 to 50 parts by mass and component (III) is within the range of from 5 to 200 parts by mass based on component (I) being 1 part by mass.