Sughrue Mion, PLLC
Guanidine compound and heat sensitive recording material
An object of the present invention is to provide a heat sensitive recording material which can develop color at high density by the inclusion of a novel guanidine compound which is strongly basic and superior in diffusion resistance. The present invention for attaining the above-described object is a heat sensitive recording material comprising a substrate supporting thereon a heat sensitive recording layer containing a diazonium salt compound, a coupler which reacts with the diazonium salt compound when heated to develop color, and a base, wherein the heat sensitive recording layer includes as the base at least one of the guanidine compounds represented by the general formula (1): wherein, in the general formula (1), R1 and R2 represent an alkyl group or aryl group and may be the same or different, R3 and R4 represent a hydrogen atom, alkyl group or halogen atom and may be the same or different, and X represents a divalent connecting group.
Fuji Photo Film Co., Ltd.
C B
C07C B41M
inventional inventional
Mitsuyuki Hisao Naoto
Tsurumi Yamada Yanagihara