COLOR DEVELOPER, HEAT-SENSITIVE RECORDING MATERIAL, AND COATING MATERIAL FOR HEAT-SENSITIVE RECORDING LAYERS

WIPO Patent Application WO/2022/145400

A1

The purpose of the present invention is to provide a color developer having excellent resistance to plasticizing materials.　For achieving the purpose, the color developer according to the present invention is a color developer for heat-sensitive recording layers, the color developer being characterized by comprising a compound represented by general formula (I) and an N-substituted amino acid derivative represented by general formula (II). In general formula (I), L represents an imino group (-NH-) or an oxy group (-O-); R1, R2 and R3 independently represent a hydrogen atom, a halogen atom, a nitro group, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkyloxy group, an alkenyl group, a fluoroalkyl group, an N(R4)2 group (wherein R4 represents a hydrogen atom, a phenyl group, a benzyl group, or a C1-C6 alkyl group), an NHCOR5 group (wherein R5 represents a C1-C6 alkyl group), a phenyl group which may be substituted, a benzyl group which may be substituted, an aryloxy group, an alkylcarbonyloxy group, an arylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, or an arylsulfonylamino group; n1, n2 and n3 independently represent an integer of 0 to 5; R1, R2 and R3 may be the same as or different from one another; when there are a plurality of (R1)'s, the (R1)'s may be the same as or different from each other; when there are a plurality of (R2)'s, the (R2)'s may be the same as or different from each other; and, when there are a plurality of (R3)'s, the (R3)'s may be the same as or different from each other. (R0-X)-Y-(Z) …(II) In general formula (II), R0 represents an alkyl group having a C6-C10 aryl group, or an aryl group which may have a substituent that is a C1-C8 alkyl group, a C7-C11 aralkyl group, a C6-C10 aryl group or a C1-C8 alkoxy group; X is a group that binds to the N-terminal of Y, and represents -OCO-, -SO2NHCO-, -NHCO-, -NHCS-, or -SO2-; Y represents an amino acid residue or a peptide residue and, in the Y group, an OH group in a serine residue, a threonine residue, an aspartic acid residue, a glutamic acid residue or a tyrosine residue may be substituted by an OR0 group or an OR" group, an SH group in a cysteine residue may be substituted by an SR0 group or an SR" group, an NH group in a histidine residue may be substituted by an NR0 group or an NR' group, and an NH2 group in a lysine residue or an ornithine residue may be substituted by an NHR0 group or an NHR' group, wherein R' represents an amino-protecting group, and R" represents a carboxy-protecting group, provided that Y is an amino acid residue other than a cystine residue or a peptide residue having no cystine residue; Z is a group that binds to the C-terminal of Y and represents an OH group or an OR" group; R0, R' and R" may be the same as or different from one another; when there are a plurality of (R0)'s, the (R0)'s may be the same as or different from each other; when there are a plurality of (R')'s, the (R')'s may be the same as or different from each other; when there are a plurality of (R")'s, the (R")'s may be the same as or different from each other; and at least two groups among R0, R' and R" may be bound to each other to form a ring.

JPS57187293	HEAT-SENSITIVE RECORDING BODY
JPH09104178	HEAT-SENSITIVE RECORDING BODY
JP4050624	Thermal recording material

ISHIBASHI YOSHIMI (JP)
KINISHI RYOICHI (JP)

PCT/JP2021/048438

July 07, 2022

December 24, 2021

Click for automatic bibliography generation  

SANKO CO LTD (JP)

B41M5/333

WO2014080615A1	2014-05-30
WO2017111032A1	2017-06-29

JP2019043005A	2019-03-22
JP2020104274A	2020-07-09
JP2019126933A	2019-08-01
JP2020040287A	2020-03-19
JP2020082406A	2020-06-04
JP2020131452A	2020-08-31
JP2018103469A	2018-07-05
JPH0426048B2	1992-05-06
JP2020219044A	2020-12-28
JP2021014999A	2021-02-12

TSUJIMARU Koichiro et al. (JP)

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