Nippon Soda Co., Ltd.

Tadahiro Kondo

Hiroshi Sakai

Shuntaro Kinoshita

Kazumi Jyujyo

Toshio Aihara

Satoshi Kodama

Kayoko Tada

An object of the present invention is to provide a recording material or a recording sheet using, as a color-developing agent, a non-phenol compound that is a safe compound in no danger of corresponding to an endocrine disruptor and is good in color developing performance. The non-phenol compound used in the present invention is at least one selected from the group consisting of compounds represented by the following formulas (I) to (III). 

Recording material produced using non-phenol compound

An object of the present invention is to provide a recording material or a recording sheet that is excellent not only in whiteness of a background but also in storage property for a background and an image, and further has excellent dynamic sensitivity. In order to achieve the object, a phenol compound represented by Formula (I) [wherein Rrepresents a hydroxyl group or a halogen atom, p represents 0 or an integer of 1 to 5, Rand Reach independently represent a hydrogen atom or a C-Calkyl group, Rrepresents a hydrogen atom, a C-Calkyl group, an optionally substituted phenyl group or an optionally substituted benzyl group; and a bond shown with a wavy line represents E- or Z-form, or a mixture thereof] and having a color space b* of 10 or less, and preferably having brightness by Hunter of 75 or more, is used as a recording material.

Recording material using phenol compound

An object of the present invention is to provide a recording material or a recording sheet that is excellent in background and image stabilities and further excellent in color-developing sensitivity. The recording material of the present invention contains a color-forming compound, an additive, and at least one compound represented by formula (I) [wherein Rand Reach independently represent a C-Calkyl group or the like; p represents 0 or any integer of 1 to 4; q represents 0 or any integer of 1 to 5; when p and q represents 2 or more, each of Rand each of Rare the same or different; Rand Reach independently represent a hydrogen atom or the like; Rrepresents a hydrogen atom or the like; and the bond represented by the wavy line represents E, Z, or a mixture thereof].

Recording material using phenolic compound

An object of the present invention is to provide a recording material that is excellent in color-developing properties and background and image stabilities, and a compound used therein. The present invention relates to a compound represented by the formula (I) [wherein Rto Reach independently represent a halogen atom or the like; n, p, q, and r each independently represent 0 or any integer of 1 to 4; m represents 0 or any integer of 1 to 2; a represents any integer of 1 to 10; Rrepresents a hydrogen atom or the like; Rrepresents an ORgroup or the like; and Rand Reach independently represent a hydrogen atom or the like], a composition containing the compound, a method for producing the compound, a recording material containing at least one compound represented by the formula (I), and a recording sheet having the recording material.

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Ichihara, Japan

Tadahiro Kondo