Recording material and compound

Patent metadata

Field	Value
Publication number	US-11529819-B2
Application number	US-201816617442-A
Country	US
Kind code	B2
Filing date	Jun 1, 2018
Priority date	Jun 8, 2017
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

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-based compound good in color developing performance and the like. A compound represented by the following formula (I) is used as the color-developing agent:(wherein X represents CH2 or the like; R1 to R3 each independently represent a hydrogen atom, a halogen atom or the like; n1 and n3 each independently represent any integer of 1 to 5; two groups represented by R3 adjacent to each other on a benzene ring optionally bond to each other to form an optionally substituted 6-membered ring; and n2 represents any integer of 1 to 4).

First claim

The invention claimed is:

1. A recording material containing a color former and at least one compound selected from the group consisting of compounds represented by the following formula (I):

wherein:
X represents CH 2 , C═O, or SO 2 ;
R 1 to R 3 each independently represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, a linear, branched or cyclic C1-C6 alkylcarbonyl group, a linear, branched or cyclic C1-C6 alkyl group, a linear, branched or cyclic C1-C6 alkoxy group, a C2-C6 alkenyl group, a linear, branched or cyclic C1-C6 fluoroalkyl group, a N(R 4 ) 2 group, wherein R 4 represents a hydrogen atom, a phenyl group, a benzyl group, or a linear, branched or cyclic C1-C6 alkyl group, a NHCOR 5 group, wherein R 5 represents a linear, branched or cyclic C1-C6 alkyl group, an optionally substituted phenyl group, or an optionally substituted benzyl group;
n1 and n3 each independently represent any integer of 1 to 5;
two groups represented by R 3 adjacent to each other on a benzene ring optionally bond to each other to form an optionally substituted 6-membered ring;
n2 represents any integer of 1 to 4; and
when X is SO 2 , at least one R 1 and/or at least one R 2 is not a hydrogen atom.

2. A recording sheet having a recording material layer formed with the recording material according to claim 1 on a support.

Assignees

• Nippon Soda Co

Inventors

• Sakai Hiroshi
• Tada Kayoko
• Kinoshita Shuntaro

Classifications

• C07C275/34

  having nitrogen atoms of urea groups and singly-bound oxygen atoms bound to carbon atoms of the same non-condensed six-membered aromatic ring · CPC title

• B41M5/327

  with a lactone or lactam ring · CPC title

• B41M5/333

  Colour developing components therefor, e.g. acidic compounds · CPC title

• B41M5/3333 Primary

  Non-macromolecular compounds · CPC title

• B41M5/3335

  Compounds containing phenolic or carboxylic acid groups or metal salts thereof · CPC title