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1. 发明专利

JP2002331760A HEAT-SENSITIVE RECORDING MATERIAL 审中-公开
公开(公告)号：JP2002331760A
公开(公告)日：2002-11-19
申请号：JP2002057729
申请日：2002-03-04
申请人： RICOH KK
发明人： HAYAKAWA KUNIO , MORITA MITSUNOBU , SHIMADA MASARU , TORII MASASHI , SUZAKI HIDEO , SHINPO HITOSHI
IPC分类号： B41M5/333 , B41M5/30
摘要： PROBLEM TO BE SOLVED: To provide a heat-sensitive recording material with high image color developing density and improved stability on an image part. SOLUTION: In the heat-sensitive recording material with a heat-sensitive recording layer in which a leuco dye and a color developer for developing a color of the leuco dye by heating are main ingredients, the heat-sensitive recording material is characterized by using a compound expressed by formula (1) as the color developer. In the formula, X is a divalent group and Y is an aromatic group which may have a substituted group.

2. 发明专利

JP2002219872A PERMEATION-TYPE THERMAL RECORDING MATERIAL, IMAGE DEVICE USING THE RECORDING MATERIAL, AND IMAGE METHOD 审中-公开
公开(公告)号：JP2002219872A
公开(公告)日：2002-08-06
申请号：JP2001354948
申请日：2001-11-20
申请人： RICOH KK
发明人： SHINPO HITOSHI , SUZAKI HIDEO , TORII MASASHI , SHIMADA MASARU
IPC分类号： B41M5/333 , B41M5/26 , B41M5/28 , B41M5/30 , B41M5/327 , B41M5/337 , B41M5/40 , B41M5/42 , C09B11/26 , C09B11/28
摘要： PROBLEM TO BE SOLVED: To provide a permeation-type thermal recording material which shows high density, high image quality and image keeping quality and especially is best-suited for use as an imaging sheet for medical use such as MRI or CT and an imaging device using the permeation-type thermal recording material as well as an imaging method. SOLUTION: In the permeation-type thermal recording material with a thermal recoding layer composed mainly of a colorless or pale-color leuco dye, a developer which thermally develops a color in the leuco dye and a binder resin as an integrating agent, formed on a support, the developer is a chemical compound represented by formula (1). In formula (1), R1 is a 4-16C straight-chain alkyl group or alkylamino group.

3. 发明专利

JP2002086921A REVERSIBLE HEAT-SENSITIVE COLOR DEVELOPMENT COMPOSITION AND REVERSIBLE HEAT-SENSITIVE RECORDING MEDIUM USING IT 失效
公开(公告)号：JP2002086921A
公开(公告)日：2002-03-26
申请号：JP2000280734
申请日：2000-09-14
申请人： RICOH KK
发明人： TORII MASASHI , SHIMADA MASARU , SHIBUYA TAKESHI , MATSUI HIROAKI
IPC分类号： B41M5/337 , B41M5/26 , B41M5/30 , B41M5/333
摘要： PROBLEM TO BE SOLVED: To provide a reversible heat-sensitive color development composition in which color developing and color erasing utilizing a color developing reaction between an electron donating color developing compound and an electron accepting compound are reversible and a reversivle heat-sensitive recording medium in which a color-developed image can be formed and erased by providing it on a substrate such as a paper and controlling heat energy. SOLUTION: In the reversible heat-sensitive color development composition in which the electron donating color developing compound and the electron accepting compound are used and relatively color-developed condition and color- erased condition can be formed by difference in heating temperature and/or cooling speed after heating, the electron donating color developing compound, the electron accepting compound and in addition, as a color erasing accelerator, a compound constituted by incorporating at least four groups of general formula (1) -X-(CH2) CHr (wherein X is -OCONH- or -NHCOO- and r is an integer of 5-21) on an aliphatic hydrocarbon group are incorporated in the reversible heat-sensitive color development composition.

4. 发明专利

JP2002036724A REVERSIBLE THERMAL COLORING COMPOSITION AND REVERSIBLE THERMAL RECORDING MEDIUM USING THE SAME 失效
公开(公告)号：JP2002036724A
公开(公告)日：2002-02-06
申请号：JP2000230521
申请日：2000-07-31
申请人： RICOH KK
发明人： SHIMADA MASARU , TORII MASASHI , SHIBUYA TAKESHI
IPC分类号： B41M5/337 , B41M5/26
摘要： PROBLEM TO BE SOLVED: To provide a reversible thermal coloring composition and a reversible thermal recording medium having a high preserving stability of a coloring state and an excellent decoloring property at the same time. SOLUTION: A compound represented by the following formula (1) (wherein R is a 12-22 C alkyl radical) as an agent for controlling coloring and decoloring is added to a reversible thermal coloring composition, in the reversible thermal coloring composition capable of forming a relative coloring state and a decoloring state caused by the difference of heating temperature and/or a coloring rate after heating, using an electron donating coloring compound and an electron accepting compound.

5. 发明专利

JP2001180116A DOCUMENT REWRITING RECORDING MEDIUM 失效
公开(公告)号：JP2001180116A
公开(公告)日：2001-07-03
申请号：JP36807599
申请日：1999-12-24
申请人： RICOH KK
发明人： FURUYA HIROMI , TSUTSUI KYOJI , SHIMADA MASARU , MATSUI HIROAKI
IPC分类号： B42D15/10 , B41M5/26 , B41M5/337
摘要： PROBLEM TO BE SOLVED: To provide a rewriting recording medium easily folded upon using a plurality of sheets of the recording medium by filing and will not be generating any faulty elimination or faulty printing due to the folding at another part upon rewriting and printing by guiding the folding from a desired place. SOLUTION: The reversible recording medium having a reversible recording layer for indicating the repeated rewriting of a documental information on a supporting body is provided with a folding pat, readily folded compared with the other part of the medium, on one part of the reversible recording medium or preferably at a part except a recording part.

6. 发明专利

JP2001071643A REVERSIBLE HEAT-SENSITIVE RECORDING MEDIUM 失效
公开(公告)号：JP2001071643A
公开(公告)日：2001-03-21
申请号：JP25137799
申请日：1999-09-06
申请人： RICOH KK
发明人： TORII MASASHI , MATSUI HIROAKI , SHIMADA MASARU
IPC分类号： B41M5/337 , B41M5/26 , B41M5/28 , B41M5/30 , B41M5/42
摘要： PROBLEM TO BE SOLVED: To provide a reversible heat-sensitive recording medium having good high-speed erasing characteristics and to obtain the recording medium having good color developing characteristics and preserving characteristics, no notch of the medium even by repeatedly using, good durability and good light resistance against an ultraviolet ray. SOLUTION: The reversible heat-sensitive recording medium comprises a reversible heat-sensitive recording layer containing a compound represented by the formula as an achromatization accelerator, wherein n is an integer of 2 to 4, R1 is a 1-20C hydrocarbon group or 1-6 a bonding hands, R2 is 1-20C hydrocarbon group, and X is bivalent group containing a hetero atom.

7. 发明专利

JPH11170704A THERMAL RECORDING MATERIAL 失效
公开(公告)号：JPH11170704A
公开(公告)日：1999-06-29
申请号：JP35198697
申请日：1997-12-08
申请人： RICOH KK
发明人： MATSUI HIROAKI , TORII MASASHI , SHIMADA MASARU
IPC分类号： B41M5/333 , B41M5/30
摘要： PROBLEM TO BE SOLVED: To improve stability and preservability of a recorded image by a method wherein a thermosensitive color layer has a leuco dye and a developer developing color in heating the leuco dye as main constituents, on a substrate, and a specific carboxylic acid series compound is used as the developer. SOLUTION: A thermal recording material has a leuco dye using a leuco compound of a dye of triphenylmethane phthalide series, triarylmethane series, fluoran series, phenothiazine series, etc., on a substrate and a developer coloring the leuco dye in heating as main constituents. Then, a carboxylic acid series compound represented by the formula is used as the developer. Further, stearic acid being thermofusible substance, fatty acid of behenic acid, etc., fatty acid amide group of stearic acid amide, palmitic acid amide, etc., or the like are jointly used as a sensitivity improver, wherein, in the formula represents an integer of 0 to 3, m represents an integer of 0 to 2, and n represents an integer of 1 to 11.

8. 发明专利

JPH11105433A REVERSIBLE THERMOSENSIBLE COLORING COMPOSITE AND REVERSIBLE THERMOSENSIBLE RECORDING MEDIUM EMPLOYING THE SAME 失效
公开(公告)号：JPH11105433A
公开(公告)日：1999-04-20
申请号：JP29049997
申请日：1997-10-07
申请人： RICOH KK
发明人： SHIMADA MASARU , MATSUI HIROAKI , TORII MASASHI
IPC分类号： B41M5/337 , B41M5/26 , B41M5/30 , B41M5/333
摘要： PROBLEM TO BE SOLVED: To retain a stable coloring property and discoloring property, and correspond to high speed erasing by the use of a phenol compound indicated by a specific formulas as an electron acceptable compound. SOLUTION: A phenol compound indicated y a formula I or formula II is used as an electron acceptable compound. In the formula, X shows a single combination of -CH2 -, -C2 H4 -, -CH=CH- or -NHCH2 -, Y shows -NHCO-,-NHSO2 -, -N=CH-,-NH-CO-NH- or-NH-CS-NH-, and R shows at least 6c alkyl group. Also, (n) is an integer of 1-3, and (l), (m), (p), (q), (s) respectively is an integer of 1-4. In the formula I and formula II, if R has at most 5c, a coloring stability or discoloring property lowers, so that carbon numbers are preferably 5 or more, and they are more preferably 10 or more. A recording medium employing the electron acceptable compound can perform high speed erasing, or iterate printing and erasing stably.

9. 发明专利

JPH10244760A THERMAL RECORDING MATERIAL 失效
公开(公告)号：JPH10244760A
公开(公告)日：1998-09-14
申请号：JP6389297
申请日：1997-03-03
申请人： RICOH KK
发明人： TORII MASASHI , MATSUI HIROAKI , SHIMADA MASARU
IPC分类号： B41M5/333 , B41M5/30 , C09D11/00
摘要： PROBLEM TO BE SOLVED: To enhance preservation stability and water resistance of a recorded image by using phenolic compound represented by a specific formula as developer. SOLUTION: A solution containing 20 pts.of 3-N,N-dibutylamino-6-methyl-7- anilinofluoran, 20 pts.of 10%-polyvinyl alcohol water solution and 60 pts.of water, B solution containing 20 pts.of phenolic compound represented by a formula (where R indicates aliphatic hydrocarbon group which may have substituent, and r indicates integer of 1 to 3), 20 pts.of 10%-polyvinyl alcohol water solution and 60 pts.of water, and C solution containing 20 pts.of silicon oxide and 80 pts.of water are prepared. 10 pts.of the A solution, 30 pts.of the B solution, 10 pts.of C solution and 10 pts.of zinc stearate dispersion liquid (30% of concentration) are mixed to form thermal color developing layer forming liquid. Woodfree paper is coated with 0.5g/m of dye adhering amount after drying to form a thermal color developing layer. Thus, the layer surface is rolled by a calender so that surface smoothness becomes 500 to 600sec to obtain the thermal recording material.

10. 发明专利

JPH10244758A THERMAL RECORDING MATERIAL 失效
公开(公告)号：JPH10244758A
公开(公告)日：1998-09-14
申请号：JP6389197
申请日：1997-03-03
申请人： RICOH KK
发明人： MATSUI HIROAKI , TORII MASASHI , SHIMADA MASARU
IPC分类号： B41M5/333 , B41M5/30
摘要： PROBLEM TO BE SOLVED: To enhance preservation stability and water resistance of a recorded image by using phenolic compound represented by a specific formula as developer. SOLUTION: A solution containing 20 pts.of 3-N,N-dibutylamino-6-methyl-7- anilinofluoran, 20 pts.of 10%-polyvinyl alcohol water solution and 60 pts.of water, B solution containing 20 pts.of phenolic compound represented by a formula (where r indicates integer of 1 to 3, and R indicates aliphatic hydrocarbon group which may have substituent), 20 pts.of 10%-polyvinyl alcohol water solution and 60 pts.of water, and C solution containing 20 pts.of silicon oxide and 80 pts.of water are prepared. 10 pts.of the A solution, 30 pts.of the B solution, 10 pts.of C solution and 10 pts.of zinc stearate dispersion liquid (30% of concentration) are mixed to form thermal color developing layer forming liquid. Woodfree paper is coated with 0.5g/m of dye adhering amount after drying to form a thermal color developing layer. Thus, the thermal recording material in which preservation stability of recorded image is high and particularly excellent water resistance are exhibited can be obtained.

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