Patent ID: 7081435
Filing Date: 2006-07-25
Classification: B41M

Abstract:
1. A thermally sensitive recording medium comprising a thermally sensitive color developing layer containing colorless or pale colored basic leuco dye and a color developing agent as a main components on a substrate, wherein said thermally sensitive recording layer contains acrylic emulsion and colloidal silica, further contains at least one kind of diphenylsulfone bridgeable compound represented by general formula A as the color developing agent, wherein X and Y can be different or same and indicates a saturated or an unsaturated liner or grafted hydrocarbon group of carbon number 1–12 which can possess an ether bond, or indicate, wherein, R indicates a methylene group or an ethylene group, T indicates a hydrogen atom or an alkyl group of carbon number 1–4, and R said diphenylsulfone bridgeable compound having an average particle diameter of 0.5 μm, said colloidal silica having a particle size of 10–25 nm and, said acrylic emulsion being blended to the thermally sensitive recording layer in a blending amount of 3–50 weight parts of the acrylic emulsion to 100 weight parts of the thermally sensitive recording layer.