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111. 发明专利

JP2000006537A ALCOHOL COMPOUND HAVING NEW UREA BOND 失效
公开(公告)号：JP2000006537A
公开(公告)日：2000-01-11
申请号：JP18830398
申请日：1998-06-18
申请人： RICOH KK
发明人： TORII MASASHI , MATSUI HIROAKI , SHIMADA MASARU , TSUTSUI KYOJI , FURUYA HIROMI , TATEWAKI TADAFUMI , KAWAMURA FUMIO , KUTAMI ATSUSHI
IPC分类号： B41M5/337 , B41M5/26 , B41M5/30 , B41M5/333 , C07C275/10
摘要： PROBLEM TO BE SOLVED: To obtain a new compound giving reversible thermal recording material having a high speed erasing property and preservability in a wide range of use environments by making an alcohol compound having urea bond expressed by a specific formula. SOLUTION: A new compound having new urea bond expressed by formulas I, II can be synthesized by an additional reaction of alcohol and alkylisocyanate having an amino group expressed e.g. by HO(CH2)nNH2 and HO(CH2)pO(CH2) qNH2 respectively. In the formula, (n) shows integers of 2-6, and (m) shows integers of 11-17. In the formula II, (p), (q) show an integer of 2-4, and (r) shows an integer of 11-17 respectively independently. The reaction is done by blending these equivalents, and creates a compound substantially quantitatively. Also, the synthesis is conducted in an organic solvent, and as a used solvent, an inactive solvent is used preferably. Also, there are given toluene, chlorobenzene, or the like as an inactive solvent.

112. 发明专利

JPH11268419A METHOD AND APPARATUS FOR TYPING AND ERASING 失效
公开(公告)号：JPH11268419A
公开(公告)日：1999-10-05
申请号：JP36031798
申请日：1998-12-18
申请人： RICOH KK
发明人： TATEWAKI TADAFUMI , FURUYA HIROMI , KAWAMURA FUMIO , KUTAMI ATSUSHI , TSUTSUI KYOJI , TORII MASASHI , SHIMADA MASARU , MATSUI HIROAKI
IPC分类号： B41J2/32 , B41M5/28 , B41M5/30 , B41M5/337 , B41M5/26
摘要： PROBLEM TO BE SOLVED: To avoid a temperature from rising and a cooling effect from being decreased in cooling means, and obviate the requirement of a high typing energy by implementing an erasing process to heat the medium to the erasing temperature of the printing image of a medium and a printing process to heat over a coloring temperature successively in this order, or implementing this simultaneously, and thereafter carrying out typing and erasing operations by a cooling process. SOLUTION: Rewriting is performed by transporting a printed recording medium 34 in the order of each typing and cooling process. In erasing means 41, a heating member 59 operates to bring the recording medium 34 in press contact to a platen roller 60 with a constant pressure in order for only a recording layer to reach an erasing temperature effectively. Printing means 42 conduct a new typing to the recording medium 34 by a thermal head 46 and a platen roller 47. Cooling means 71 serves to perform rapid cooling operation for sufficient coloring density by installing a pressing member 72 and allowing the cooling member to be in contact with the recording medium 34. By providing a temperature detectors 81, 82, a contact time is controlled between the recording medium 34 and the cooling member.

113. 发明专利

JPH11188969A REVERSIBLE HEAT-SENSITIVE COLOR-DEVELOPING COMPOSITION, AND REVERSIBLE HEAT-SENSITIVE RECORDING MEDIUM USING SAME 失效
公开(公告)号：JPH11188969A
公开(公告)日：1999-07-13
申请号：JP36725197
申请日：1997-12-25
申请人： RICOH KK
发明人： TORII MASASHI , MATSUI HIROAKI , SHIMADA MASARU , TSUTSUI KYOJI , FURUYA HIROMI , TATEWAKI TADAFUMI , KAWAMURA FUMIO , KUTAMI ATSUSHI
IPC分类号： B41M5/337 , B41M5/26 , C09K9/02
摘要： PROBLEM TO BE SOLVED: To keep stable color-developing property and decoloring property, and at the same time, correspond with a high speed erasing by improving the thermal response property by a method wherein two kinds of compounds represented by specified structural formulas respectively are contained as color-developing, decoloring control agents, together with an electron donative color-developing compound and an electron acceptor compound. SOLUTION: Together with an electron donative color developing compound, and an electron acceptor compound, as color-developing, decoloring control agents, a specified urea compound which is represented by a formula (in the formula, (m) and (n) are independently integers of 7-21), and a hydrocarbon compound including a specified hetero atom, which is represented by the formula: R2 -X1 (R1 -X2 )γ -R2 ', (wherein X, X show a divalent group including a hetero atom, R1 shows a bivalent hydrocarbon group of which the number of carbon atoms is 1-20, R2 and R2 ' independently show a hydrocarbon group or a heterocyclic group, and (r) shows integers of 0-4) are contained, and thus, the thermal response property is improved, and this recording medium is made correspondable with a high speed erasing, and at the same time, the storage characteristics (especially storage characteristics against heat) can be improved.

114. 发明专利

JPH1170731A REVERSIBLE THERMAL RECORDING MEDIUM 失效
公开(公告)号：JPH1170731A
公开(公告)日：1999-03-16
申请号：JP19376998
申请日：1998-06-24
申请人： RICOH KK
发明人： FURUYA HIROMI , TORII MASASHI , TATEWAKI TADAFUMI , MATSUI HIROAKI , KAWAMURA FUMIO , SHIMADA MASARU , TSUTSUI KYOJI
IPC分类号： B41M5/30 , B41M5/327 , B41M5/333 , B41M5/337 , B41M5/26
摘要： PROBLEM TO BE SOLVED: To make storage properties high and high speed eliminating properties and coloring properties good and to improve repeating durability without generation of dent in a recording medium even after repeated use by making a coloring part by heat printing have specified storage/elimination properties and additionally keep specified elimination properties. SOLUTION: This reversible thermal recording medium uses electron-donating coloring and electron accepting compounds on a support and has at least a reversible thermal recording layer containing a reversible heat coloring composition which can form a relatively color-developed/eliminated state by the difference of heating temperatures and/or cooling speeds after heating. The reversible thermal recording medium is made to have storage properties in which a coloring part by heat-printing is of a density holding percentage after 24 hr under drying conditions at 50 deg.C of 60 % or more and an elimination properties in which the residual density is 0.03 or less when the coloring part was heat- eliminated at 110 deg.C for 0.5 sec. Moreover, elimination properties in which the residual density after light-deterioration when heat-eliminated at 110 deg.C for 0.5 sec after being irradiated with the light of a fluorescent lamp of 5,000 lux is 0.04 or less are made to be maintained.

115. 发明专利

JPH10193799A HEAT-SENSITIVE RECORDING MEDIUM 失效
公开(公告)号：JPH10193799A
公开(公告)日：1998-07-28
申请号：JP1472897
申请日：1997-01-10
申请人： RICOH KK
发明人： SHIMADA MASARU , TORII MASASHI , MATSUI HIROAKI
IPC分类号： B41M5/333 , B41M5/30
摘要： PROBLEM TO BE SOLVED: To enhance stability of a recorded image by using a carboxylic acid compound represented by a specific formula as a developer. SOLUTION: A carboxylic acid compound represented by the formula is used as a developer (wherein, R1 represents a single bond or a 1-12C divalent hydrocarbon group, R2 represents an aliphatic or an aromatic hydrocarbon group which may have a substituent, and X represents a divalent group including a hetero atom). In the formula, R1 represents a single bond and a phenylene group or a naphtylene group, which may have an alkylene group or a substituent. R2 represents a 1-18C alkyl group, an aralkyl group, a phenyl group, and a naphthyl group, which may have a substituent. Further, as the developer, various electron-accepting compounds, for example, a phenolic compound, a thiophenolic compound, a thiourea derivative, an organic acid and its metal salt, etc., can also be used together with the carboxylic compound represented by the formula.

116. 发明专利

JPH10193798A HEAT-SENSITIVE RECORDING MEDIUM 失效
公开(公告)号：JPH10193798A
公开(公告)日：1998-07-28
申请号：JP1472797
申请日：1997-01-10
申请人： RICOH KK
发明人： SHIMADA MASARU , TORII MASASHI , MATSUI HIROAKI
IPC分类号： B41M5/333 , B41M5/30
摘要： PROBLEM TO BE SOLVED: To enhance stability of a recorded image by using a phenolic compound represented by a specific formula as a developer. SOLUTION: A phenolic compound represented by the formula is used as a developer (wherein, R1 represents a single bond or a 1-12C divalent hydrocarbon group, R2 represents an aliphatic or an aromatic hydrocarbon group which may have a substituent, and X represents a divalent group including a hetero atom). In the formula, R1 represents a single bond and a phenylene group or a naphthylene group, which may have an alkylene group or a substituent. R2 represents a 1-18C alkyl group, an aralkyl group, a phenyl group, and a naphthyl group, which may have a substituent. Further, as the developer, various electron- accepting compounds, for example, a phenolic compound, a thiophenolic compound, a thiourea derivative, an organic acid and its metal salt, etc., can also be used together with the phenolic compound represented by the formula.

117. 发明专利

JPH10147071A REVERSIBLE HEAT SENSITIVE COLOR DEVELOPING COMPOSITION AND REVERSIBLE RECORDING MEDIUM USING IT 失效
公开(公告)号：JPH10147071A
公开(公告)日：1998-06-02
申请号：JP31849696
申请日：1996-11-15
申请人： RICOH KK
发明人： SHIMADA MASARU , TORII MASASHI , MATSUI HIROAKI , TSUTSUI KYOJI
IPC分类号： B41M5/337 , B41M5/26 , B41M5/30 , B41M5/333
摘要： PROBLEM TO BE SOLVED: To hold stable color developability and color erasability and to conduct erasing at a high speed by using a 4-carboxyphthalimide compound represented by a specific formula as an electron acceptive compound of one component of a reversible heat sensitive color developing composition. SOLUTION: In the reversible heat sensitive color developing composition for forming the relatively color developed state and the color erased state according to difference of cooling velocity at heating temperature and/or after heating by using an electron donative coloring compound and an electric acceptive compound, a 4-carboxyphthalimide compound represented by the formula is used as the electric acceptive compound. In the formula, R1 indicates a bivalent hydrocarbon group, R2 indicates an aliphatic hydrocarbon group, aromatic hydrocarbon group or hydrocarbon group constituted by the both, and X indicates a bivalent group containing a single bond or hereto atom. A recording layer containing a reversible heat sensitive color developing compound as a main component is provided on the support to form a predetermined reversible heat sensitive recording medium.

118. 发明专利

JPH10147064A REVERSIBLE HEAT-SENSITIVE COLORING COMPOSITION AND REVERSIBLE RECORDING MEDIUM USING THE SAME 失效
公开(公告)号：JPH10147064A
公开(公告)日：1998-06-02
申请号：JP31851696
申请日：1996-11-15
申请人： RICOH KK
发明人： SHIMADA MASARU , TORII MASASHI , MATSUI HIROAKI , TSUTSUI KYOJI
IPC分类号： B41M5/337 , B41M5/26 , B41M5/30 , B41M5/333 , C07D209/48
摘要： PROBLEM TO BE SOLVED: To hold stable coloring efficiency and decoloring efficiency by using as an electron-accepting compound a 4-hydroxyphthalimide compound expressed by a specific formula in a reversible heat-sensitive coloring composition utilizing a color reaction between an electron-donating coloring compound and the electron-accepting compound. SOLUTION: A reversible heat-sensitive coloring composition uses an electron- donating coloring compound and an electron-accepting compound and can form a relatively colored state and a decolored state by a difference of a heating temperature and/or a cooling temperature after heating. A 4-hydroxyphthalimide compound expressed by a formula is used as the electron-accepting compound. In the formula, R1 is a divalent hydrocarbon group which may have a single bond or substituent, R2 is an aliphatic hydrocarbon group, an aromatic hydrocarbon group, etc., and X is a divalent group including a single bond or hetero atom. A recording layer containing the reversible heat-sensitive coloring composition as a primary component is set on a supporting body, whereby a required reversible heat-sensitive recording medium is formed.

119. 发明专利

JPH09207436A REVERSIBLE HEAT-SENSITIVE COLOR-DEVELOPING COMPOSITION AND REVERSIBLE RECORDING MEDIUM USING IT 失效
公开(公告)号：JPH09207436A
公开(公告)日：1997-08-12
申请号：JP3572096
申请日：1996-01-31
申请人： RICOH KK
发明人： TORII MASASHI , MATSUI HIROAKI , FURUYA HIROMI , SHIMADA MASARU , TSUTSUI KYOJI
IPC分类号： B41M5/337 , B41M5/26 , B41M5/30 , B41M5/333
摘要： PROBLEM TO BE SOLVED: To provide a reversible color-developing compsn. and a reversible heat-sensitive recording medium which hold stable color developing properties and color-removing properties and can cope with a wide range of using condition and environmental condition. SOLUTION: This heat-sensitive color-developing compsn. is constituted in such a way that by using an electron-donating color-developing compd. and an electron-accepting compd., a relatively color-developed condition and a color- erased condition are formed by the difference in heating temp. and/or cooling speed after heating As the electron-accepting compd., a carboxylic acid compd. of the formula wherein A is a hydrocarbon group of at least 8C which may contain a heteroatom and B is an aliph. hydrocarbon group which may contain a substituent, is used.

120. 发明专利

JPH09193557A REVERSIBLE HEAT SENSITIVE COLOR DEVELOPING COMPOSITION AND REVERSIBLE HEAT SENSITIVE RECORDING MEDIUM EMPLOYING THE COMPOSITION 失效
公开(公告)号：JPH09193557A
公开(公告)日：1997-07-29
申请号：JP2058996
申请日：1996-01-12
申请人： RICOH KK
发明人： FURUYA HIROMI , TORII MASASHI , TSUTSUI KYOJI
IPC分类号： B41M5/337 , B41M5/26 , B41M5/30 , B41M5/333
摘要： PROBLEM TO BE SOLVED: To provide a reversible color developing composition and a reversible heat sensitive recording medium, retaining a stabilized color developing property and a decoloring property while corresponding to the using and environmental conditions in a wide range. SOLUTION: In this reversible color developing composition, capable of forming color developing condition and decoloring condition relatively employing an electron donor color developing compound and an electron receiving compound due to a difference between a heating temperature and/or cooling speed after heating, a reversible heat sensitive recording medium is composed of an electron accepting compound or a recording layer, containing a reversible heat sensitive color developing composition, employing a phenolic compound shown by the formula and containing the composition of the same as a principal constituent, and a supporting body, on which the recording layer is provided. (wherein R1 is a 6-22C aliphatic hydrocarbon group and X is a direct bonding hand or a bivalent group).

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