Thermosensitive recording medium

Patent metadata

Field	Value
Publication number	US-9579916-B2
Application number	US-201415025438-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Sep 30, 2013
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The purpose of the present invention is to provide a thermosensitive recording medium with an increased gloss in the blank and printed portions, excellent color developing sensitivity and excellent printing run-ability, particularly excellent printing run-ability at high-speed printing.
Provided is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored basic leuco dye and an electron accepting color developing agent, an intermediate layer and a gloss layer as an outermost layer in this order on a substrate, wherein the intermediate layer is formed by containing a carboxyl group-containing resin and the gloss layer is formed by containing a long chain alkyl group-containing resin and an emulsion type silicone copolymer resin. The long chain alkyl group-containing resin is preferably an acrylic resin containing long-chain alkyl group(s) and the silicone copolymer resin is preferably a silicone-acryl copolymer resin and/or a silicone-urethane copolymer resin.

First claim

What is claimed is:

1. A thermosensitive recording medium comprising, in order on a substrate: a thermosensitive recording layer comprising a colorless or pale colored leuco dye and an electron accepting color developing agent; an intermediate layer comprising a carboxyl group-containing resin; and, as the outermost layer, a gloss layer comprising a long chain alkyl group-containing resin and an emulsion type silicone copolymer resin, wherein the long chain alkyl group-containing resin is an acrylic resin containing long-chain alkyl group(s).

2. The thermosensitive recording medium of claim 1 , wherein the carboxyl group-containing resin is an acrylic resin or a carboxy-modified polyvinyl alcohol.

3. The thermosensitive recording medium of claim 2 , wherein the number of carbon atoms of the long-chain alkyl group(s) is from 6 to 30.

4. The thermosensitive recording medium of claim 2 , wherein the silicone copolymer resin is a silicone-acryl copolymer resin and/or a silicone-urethane copolymer resin.

5. The thermosensitive recording medium of claim 1 , wherein the acrylic resin containing long-chain alkyl group(s) is an acrylic acid ester copolymer resin containing long-chain alkyl group(s).

6. The thermosensitive recording medium of claim 5 , wherein the number of carbon atoms of the long-chain alkyl group(s) is from 6 to 30.

7. The thermosensitive recording medium of claim 5 , wherein the silicone copolymer resin is a silicone-acryl copolymer resin and/or a silicone-urethane copolymer resin.

8. The thermosensitive recording medium of claim 1 , wherein the number of carbon atoms of the long-chain alkyl group(s) is from 6 to 30.

9. The thermosensitive recording medium of claim 1 , wherein the silicone copolymer resin is a silicone-acryl copolymer resin and/or a silicone-urethane copolymer resin.

Assignees

• Jujo Paper Co Ltd

Inventors

• Matsumori Yasuaki
• Ogino Akihito
• Midorikawa Yoshimi
• Watanabe Yoshihide

Classifications

• B41M5/40 Primary

  characterised by the base {backcoat}, intermediate, or covering layers, {e.g. for thermal transfer dye-donor or dye-receiver sheets}; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography {(macromolecular ink- or dye-receptive coatings B41M5/52)} · CPC title

• B41M5/333

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

• B41M5/529 Primary

  characterised by the use of fluorine- or silicon-containing organic compounds · CPC title

• B41M5/5254

  characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers · CPC title

• B41M5/44

  characterised by the macromolecular compounds · CPC title