Patent ID: 6197460
Filing Date: 2001-03-06
Classification: B41M,C09K,G02F

Abstract:
A rewritable, heat sensitive, color image recording medium comprising a pair of opposed substrate sheets at least one of which is transparent, and a heat sensitive layer interposed between said substrate sheets and comprising a cholesteric liquid crystal compound having a molecular weight of not greater than 2,000 and a glass transition point of at least 35.degree. C., wherein said chloesteric liquid crystal compound is represented by the formula:Z--O--CO--R--CO--O--Ywherein Z and Y are each independently selected from the group consisting of a cholesteryl group, a hydrogen atom and an alkyl group with the proviso that at least one of Z and Y stands for a cholesteryl group, and R stands for a divalent hydrocarbyl group having 2-20 carbon atoms.