US4760048A
Expired / Lapsed
US
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Multicolor heat-sensitive recording material
Assignee: Fujifilm Holdings Corp
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Filing: 1986-02-28
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Granted: 1988-07-26
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Expires: 2006-02-28
Abstract
Abstract A multicolor heat-sensitive recording material is disclosed, comprising a support having carried thereon at least two colorless or light-colored color formers capable of developing different colors and color developers capable of reacting with said color formers upon heating to develop colors, wherein at least one of the color formers and color developers is encapsulized, at least one of the color formers is a diazo compound which is substantially decomposed by light, and at least one of the other color formers is a compound which is not substantially decomposed by light. The material provide a multicolor image having excellent hues and sharpness without color smearing and is free from undesired color formation before or after recording.
Inventors
- 👤 Nobuhiro Kurihara
- 👤 Sumitaka Tatsuta
- 👤 Jun Yamaguchi
- 👤 Toshimasa Usami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
85 words
A multicolor heat-sensitive recording material comprising a support having carried thereon at least two colorless or light-colored color formers capable of developing different colors, and color developers capable of reacting with said color formers upon heating to develop colors, wherein the color formers are encapsulated in heat sensitive capsules, at least one of the color formers is a diazo compound which is substantially decomposed by light, and at least one of the other color formers is a compound which is not substantially decomposed by light.
Claim 2
Dependent Claim
85 words
A multicolor heat-sensitive recording material comprising a support having carried thereon at least two colorless or light-colored color formers capable of developing different colors, and color developers capable of reacting with said color formers upon heating to develop colors, wherein the color formers are encapsulated in heat sensitive capsules, at least one of the color formers is a diazo compound which is substantially decomposed by light, and at least one of the other color formers is a compound which is not substantially decomposed by light.
Claim 3
Dependent Claim
37 words
A multicolor heat-sensitive recording material as in claim 1, wherein the color former which is not substantially decomposed with light is an acid leuco dye and the color developer capable of reacting therewith is a basic substance.
Claim 4
Dependent Claim
54 words
A multicolor heat-sensitive recording material as in claim 2, wherein the material further contains an acidic substance as a decoloring agent, said acidic substance being encapsulized into microcapsules having a microcapsule wall that has a glass transition temperature higher than the temperature at which said diazo compound and said acid leuco dye develop colors.
Claim 5
Dependent Claim
21 words
A multicolor heat-sensitive recording material as in claim 2, wherein the diazo compound and the acid leuco dyes are separately encapsulized.
Claim 6
Dependent Claim
37 words
A multicolor heat-sensitive recording material as in claim 4, wherein two or more acid leuco dyes which develop different colors are separately encapsulized into microcapsules whose walls are different in the temperature at which color formation starts.
Claim 7
Dependent Claim
35 words
A multicolor heat-sensitive recording material as in claim 2, comprising two or more diazo compound which develop different colors separately encapsulized in microcapsules whose walls are different in the temperature at which color formation starts.
Claim 8
Dependent Claim
43 words
A multicolor heat-sensitive recording material as in claim 2, wherein two or more diazo compounds and two or more acid leuco dyes which develop different colors are separately encapsulized into microcapsules whose walls are different in the temperature at which color formation starts.
Claim 9
Dependent Claim
37 words
A multicolor heat-sensitive recording material as in claim 1, wherein the color former which is not substantially decomposed by light is a basic leuco dye and the color developer capable of reacting therewith is an acidic substance.
Claim 10
Dependent Claim
54 words
A multicolor heat-sensitive recording material as in claim 8, wherein the material further contains a basic substance as a decoloring agent, said basic substance being encapsulized into microcapsules having a microcapsule wall that has a glass transition temperature higher than the temperature at which said diazo compound and said basic leuco dye develop colors.
Claim 11
Dependent Claim
42 words
A multicolor heat-sensitive recording material as in claim 8, wherein the diazo compound is encapsulized, and a layer containing said diazo compound and the basic substance and a layer containing the basic leuco dye and the acidic color developer are separately formed.
Claim 12
Dependent Claim
103 words
A multicolor heat-sensitive recording material as in claim 1, wherein said diazo compound is present in an amount of from 0.05 to 1.5 g/m 2 , the color developer capable of reacting with the diazo compound is present in an amount of from 0.3 to 8 g/m 2 , said color former which is not substantially decomposed by light is present in an amount of from 0.05 to 1.5 g/m 2 , and the color developer capable of reacting with the color former which is not substantially decomposed by light is present in an amount of from 0.3 to 8 g/m 2 .
Claim 13
Dependent Claim
37 words
A multicolor heat-sensitive recording material as in claim 11, wherein the color former which is not substantially decomposed with light is an acid leuco dye and the color developer capable of reacting therewith is a basic substance.
Claim 14
Dependent Claim
54 words
A multicolor heat-sensitive recording material as in claim 12, wherein the material further contains an acidic substance as a decoloring agent, said acidic substance being encapsulized into microcapsules having a microcapsule wall that has a glass transition temperature higher than the temperature at which said diazo compound and said acid leuco dye develop colors.
Claim 15
Dependent Claim
26 words
A multicolor heat-sensitive recording material as in claim 13, wherein the decoloring agent is present in an amount of from 0.3 to 10 g/m 2 .
Claim 16
Dependent Claim
26 words
A multicolor heat-sensitive recording material as in claim 13, wherein the decoloring agent is present in an amount of from 1 to 5 g/m 2 .
Claim 17
Dependent Claim
103 words
A multicolor heat-sensitive recording material as in claim 1, wherein said diazo compound is present in an amount of from 0.5 to 0.8 g/m 2 , the color developer capable of reacting with the diazo compound is present in an amount of from 0.5 to 5 g/m 2 , said color former which is not substantially decomposed by light is present in an amount of from 0.5 to 0.8 g/m 2 , and the color developer capable of reacting with the color former which is not substantially decomposed by light is present in an amount of from 0.5 to 5 g/m 2 .
Claim 18
Dependent Claim
17 words
A multicolor heat-sensitive recording material as in claim 1, wherein the material further contains a basic substance.
Claim 19
Dependent Claim
26 words
A multicolor heat-sensitive recording material as in claim 17, wherein said basic substance is present in an amount of from 0.3 to 8 g/m 2 .
Claim 20
Dependent Claim
26 words
A multicolor heat-sensitive recording material as in claim 17, wherein said basic substance is present in an amount of from 0.5 to 5 g/m 2 .
Claim 21
Dependent Claim
35 words
A multi-color heat sensitive recording material as in claim 1, wherein the glass transition temperature of the capsule wall containing at least one of the color formers or color developers is 90° C. or greater.
Claim 22
Dependent Claim
40 words
A multi-color heat sensitive recording material as in claim 1, wherein at least two reactive components are microencapsulated, and the glass transition temperature of at least one of the microcapsules is approximately 30° C. greater than one of the others.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |