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Thermosensitive recording material

A heat-sensitive recording material and heat-sensitive recording technology, applied in temperature recording method, copying/marking method, printing, etc., can solve problems such as flex cracking and achieve excellent water resistance

Active Publication Date: 2012-05-09
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the protective layer formed by these existing (meth)acrylamide copolymer emulsions has excellent water resistance, solvent resistance, heat resistance, etc., it sometimes produces flex cracking (flexcracking). There is still room for improvement in terms of scratch resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0087] Add 60 parts of deionized water, 0.1 part of sodium dodecylbenzenesulfonate and 1.0 part of potassium persulfate into a separable flask with a stirrer and a reflux condenser, replace the inside of the flask with nitrogen and raise the temperature to 70°C .

[0088] Then, a monomer emulsion having the following composition was continuously added to the flask over about 4 hours. Thereafter, it was polymerized for about 4 hours to obtain a seed emulsion (S-1) having a solid content of about 50%.

[0089]

[0090] Acrylonitrile 20 parts

[0091] 36 parts of methyl methacrylate

[0092] 36 parts of 2-ethylhexyl acrylate

[0093] 5 parts of 2-hydroxyethyl methacrylate

[0094] 3 parts methacrylic acid

[0095] Sodium dodecylbenzenesulfonate 0.3 parts

[0096] 40 parts deionized water

[0097] Next, 1000 parts of the above-mentioned seed emulsion (S-1), 650 parts of deionized water, 95 parts of methacrylamide, and 155 parts of an aqueous solution obtained by dissolvin...

manufacture example 2

[0100] Add 60 parts of deionized water, 0.1 part of sodium lauryl sulfate, and 1.0 part of potassium persulfate into a separable flask equipped with a stirrer and a reflux condenser, replace the inside of the flask with nitrogen, and then raise the temperature to 70°C.

[0101] Next, a monomer emulsion having the following composition was continuously added to the flask over about 4 hours. After that, it was polymerized for about 4 hours to obtain a seed emulsion (S-2) having a solid content of about 50%.

[0102]

[0103] Acrylonitrile 60 parts

[0104] Styrene 5 parts

[0105] 30 parts of butyl acrylate

[0106] 2 parts of 2-hydroxyethyl methacrylate

[0107] 3 parts methacrylic acid

[0108] 0.1 parts of n-dodecanethiol

[0109] Sodium dodecylbenzenesulfonate 0.3 parts

[0110] 40 parts deionized water

[0111] Next, 200 parts of the above seed emulsion (S-2) and 300 parts of deionized water were added to a separable flask equipped with a stirrer and a reflux conde...

manufacture example 3

[0119] 100 parts of deionized water were added to a separable flask equipped with a stirrer and a reflux condenser, and the inside of the flask was replaced with nitrogen, and then the temperature was raised to 80°C.

[0120] Next, 2.0 parts of ammonium persulfate was added to the flask, and thereafter, a mixture of a vinyl monomer having the following composition and deionized water was continuously added to the flask over 2 hours while stirring. After that, it was kept for 2 hours to end the polymerization. After cooling to below 40° C., the pH was adjusted to 7.0 with aqueous ammonia to obtain an aqueous solution of a copolymer resin (A-1) with a solid content of about 25%.

[0121]

[0122] 55 parts of methacrylamide

[0123] 15 parts of 2-hydroxyethyl methacrylate

[0124] 20 parts of methacrylic acid

[0125] Sodium methacrylate 5 parts

[0126] Butyl acrylate 5 parts

[0127] 200 parts of deionized water

[0128] 60 parts of deionized water for solid content adj...

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PUM

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Abstract

Disclosed is a material which is less likely to cause cracking upon folding, which has excellent scratch resistance, and which is suitable as a protective layer for a thermosensitive material. Specifically disclosed is a thermosensitive recording material comprising a base, a thermosensitive recording layer formed on the base, and a protective layer formed on the thermosensitive recording layer, wherein the protective layer is produced from a mixture which comprises an emulsion (a) containing a particle composed of a hydrophobic polymer (1) and a hydrophilic polymer (2) and a non-crosslinkable urea compound (b). The hydrophobic polymer (1) preferably contains a constituent unit derived from acrylonitrile. The non-crosslinkable urea compound (b) is preferably urea or a urea derivative.

Description

technical field [0001] The present invention relates to a thermosensitive recording material. Background technique [0002] Thermosensitive recording materials in which a thermosensitive recording layer is formed on a support such as paper or plastic film are widely used as output paper materials for facsimile machines, industrial metering terminals, medical terminals, portable terminals, POS systems, and ticket issuing systems. sheets) etc. [0003] In thermosensitive recording materials, in order to protect the thermosensitive recording layer from water, plasticizers, fats and oils, solvents, etc., a protective layer is usually formed on the thermosensitive recording layer. [0004] As a material used for the above-mentioned protective layer, for example, a (meth)acrylamide copolymer emulsion has been studied (for example, see Patent Document 1, Patent Document 2, and Patent Document 3). However, although the protective layer formed by these existing (meth)acrylamide cop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41M5/337B41M5/28B41M5/30B41M5/42
CPCB41M2205/04B41M2205/40B41M5/44
Inventor 江藤彰纪石塚友和
Owner MITSUI CHEM INC
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