US4658276A
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Phthalide derivatives and recording system utilizing the same
Assignee: New Oji Paper Co Ltd
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Filing: 1986-06-11
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Granted: 1987-04-14
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Expires: 2006-06-11
Abstract
Abstract A new phthalide derivative useful as a colorless chromogenic material has the following formula: <IMAGE> wherein R1, R2, R3, R4, R5 and R6 have the same meaning as defined hereinbefore.
Inventors
- 👤 Nobuo Kanda
- 👤 Tetsuro Horiike
- 👤 Mitsuru Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:12
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/323; B41M5/327; B41M5/124; B41M5/132; B41M5/136; B41M5/145; C; C07; C07D; C07D307/00; C07D307/94; C07D407/00; C07D407/02; C07D407/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
411 words
A recording system which utilizes the color forming reaction between a colorless chromogenic material and an electron accepting acid reactant material, comprising a base sheet and a chromogenic material which comprises at least one phthalide derivative having the following formula: ##STR10## wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 and R 6 radicals is an alkoxyalkyl having 3 to 8 carbon atoms; an unsaturated alkyl having 3 to 9 carbon atoms, tetrahydrofurfuryl; tetrahydropyran-2-methyl; an aralkyl represented by the following formula ##STR11## in which n is 0, 1 or 2, R 7 is hydrogen or an alkyl having 1 to 4 carbon atoms and R 8 is hydrogen, halogen, an alkyl having 1 to 4 carbon atoms or an alkoxyl having 1 to 4 carbon atoms, and when n is 0 and R 7 is hydrogen, R 8 is halogen or an alkoxy having 1 to 4 carbon atoms; an alkyl having 2 to 8 carbon atoms and having phenoxy group which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms, and alkoxyls having 1 to 4 carbon atoms; or a halogenated alkyl having 1 to 8 carbon atoms; and each of the other ones of said radicals is hydrogen; an alkyl having 1 to 8 carbon atoms which may be substituted by at least one halogen; a cycloalkyl having 5 to 12 carbon atoms; an alkoxyalkyl having 3 to 8 carbon atoms; an unsaturated alkyl having 3 to 9 carbon atoms; tetrahydrofurfuryl; tetrahydropyran-2-methyl; an aralkyl which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms and alkoxyls having 1 to 4 carbon atoms; an aryl which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms and alkoxys having 1 to 4 carbon atoms; or an alkyl having 2 to 8 carbon atoms and having phenoxy group which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms, and alkoxyls having 1 to 4 carbon atoms; or one or two pairs of R 1 and R 2 , R 3 and R 4 , and R 5 and R 6 may form morpholino, pyrrolidino, piperidino or hexamethyleneimino group together with the adjacent nitrogen atom.
Claim 2
Dependent Claim
411 words
A recording system which utilizes the color forming reaction between a colorless chromogenic material and an electron accepting acid reactant material, comprising a base sheet and a chromogenic material which comprises at least one phthalide derivative having the following formula: ##STR10## wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 and R 6 radicals is an alkoxyalkyl having 3 to 8 carbon atoms; an unsaturated alkyl having 3 to 9 carbon atoms, tetrahydrofurfuryl; tetrahydropyran-2-methyl; an aralkyl represented by the following formula ##STR11## in which n is 0, 1 or 2, R 7 is hydrogen or an alkyl having 1 to 4 carbon atoms and R 8 is hydrogen, halogen, an alkyl having 1 to 4 carbon atoms or an alkoxyl having 1 to 4 carbon atoms, and when n is 0 and R 7 is hydrogen, R 8 is halogen or an alkoxy having 1 to 4 carbon atoms; an alkyl having 2 to 8 carbon atoms and having phenoxy group which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms, and alkoxyls having 1 to 4 carbon atoms; or a halogenated alkyl having 1 to 8 carbon atoms; and each of the other ones of said radicals is hydrogen; an alkyl having 1 to 8 carbon atoms which may be substituted by at least one halogen; a cycloalkyl having 5 to 12 carbon atoms; an alkoxyalkyl having 3 to 8 carbon atoms; an unsaturated alkyl having 3 to 9 carbon atoms; tetrahydrofurfuryl; tetrahydropyran-2-methyl; an aralkyl which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms and alkoxyls having 1 to 4 carbon atoms; an aryl which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms and alkoxys having 1 to 4 carbon atoms; or an alkyl having 2 to 8 carbon atoms and having phenoxy group which may be substituted by at least one selected from the group consisting of halogens, alkyls having 1 to 4 carbon atoms, and alkoxyls having 1 to 4 carbon atoms; or one or two pairs of R 1 and R 2 , R 3 and R 4 , and R 5 and R 6 may form morpholino, pyrrolidino, piperidino or hexamethyleneimino group together with the adjacent nitrogen atom.
Claim 3
Dependent Claim
17 words
A recording system as defined in claim 1, wherein said recording system is a pressure-sensitive recording system.
Claim 4
Dependent Claim
17 words
A recording system as defined in claim 1, wherein said recording system is a heat-sensitive recording system.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
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