US4758495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazo microcapsule recording material prepared using ion exchange treatment
Assignee: Fujifilm Holdings Corp
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Filing: 1986-03-26
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Granted: 1988-07-19
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Expires: 2006-03-26
Abstract
Abstract A process for preparing a recording material comprising a support and a recording layer on the support, said recording layer containing a coupling agent and containing microcapsules containing a diazo compound, wherein a microcapsule dispersion which is coated on the support to form the recording layer is prepared by preparing an emulsion containing at least a diazo compound and a microcapsule wall-forming substance, forming microcapsule walls on emulsion droplets, and removing diazo compound remaining unincluded in the microcapsules formed from the emulsion.
Inventors
- 👤 Jun Yamaguchi
- 👤 Toshimasa Usami
- 👤 Sumitaka Tatsuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/002
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
139 words
A recording material comprising a support and a recording layer on the support, said recording layer containing a coupling agent and containing microcapsules containing a light sensitive and heat sensitive diazo compound, said coupling agent being capable of coupling with the diazo compound to form a recorded image, and said coupling agent and said microcapsules being present in said recording material in an amount which is effective to impart a heat color forming property to said recording material, wherein a microcapsule dispersion which is coated on the support to form the recording layer is prepared by preparing an emulsion containing at least a light sensitive and heat sensitive diazo compound and a microcapsule wall-forming substance, forming microcapsule walls on emulsion droplets, and removing diazo compound remaining unincluded in the microcapsules formed from the emulsion by an ion exchange treatment.
Claim 2
Dependent Claim
139 words
A recording material comprising a support and a recording layer on the support, said recording layer containing a coupling agent and containing microcapsules containing a light sensitive and heat sensitive diazo compound, said coupling agent being capable of coupling with the diazo compound to form a recorded image, and said coupling agent and said microcapsules being present in said recording material in an amount which is effective to impart a heat color forming property to said recording material, wherein a microcapsule dispersion which is coated on the support to form the recording layer is prepared by preparing an emulsion containing at least a light sensitive and heat sensitive diazo compound and a microcapsule wall-forming substance, forming microcapsule walls on emulsion droplets, and removing diazo compound remaining unincluded in the microcapsules formed from the emulsion by an ion exchange treatment.
Claim 3
Dependent Claim
59 words
The recording material as in claim 1, wherein said microcapsule walls on emulsion droplets are walls of a polymeric substance selected from the group consisting of polyurethane, polyurea, polyamide, polyester, polycarbonate, a urea-formaldehyde resin, a melamine resin, polystyrene, a styrene-methacrylate copolymer, a styrene-acrylate copolymer, gelatin, polyvinyl pyrrolidone, polyvinyl alcohol, or mixtures comprising two or more of said polymeric substances.
Claim 4
Dependent Claim
48 words
The recording material as in claim 2, wherein said diazo compound is coated in an amount of from 0.05 to 5.0 g/m 2 and said coupling component is used in an amount of from 0.1 to 10 parts by weight per part by weight of the diazo compound.
Claim 5
Dependent Claim
20 words
The recording material of claim 1, wherein said ion exchange treatment is an ion exchange treatment in an aqueous dispersion.
Claim 6
Dependent Claim
24 words
A recording material as in claim 1, wherein said diazo compound is coated in an amount of from 0.05 to 5.0 g/m 2 .
Claim 7
Dependent Claim
32 words
A recording material as in claim 2, wherein the coupling component is used in an amount of from 0.1 to 10 parts by weight per part by weight of the diazo compound.
Claim 8
Dependent Claim
16 words
A recording material as in claim 1, wherein the recording layer additionally contains a basic substance.
Claim 9
Dependent Claim
24 words
A recording material as in claim 7, wherein said diazo compound is coated in an amount of from 0.05 to 5.0 g/m 2 .
Claim 10
Dependent Claim
45 words
A recording material as in claim 7, wherein the amounts of the coupling component and the basic substance are from 0.1 to 10 parts by weight, and an amount of up to 20 parts by weight, respectively, per part by weight of the diazo compound.
Claim 11
Dependent Claim
45 words
A recording material as in claim 8, wherein the amounts of the coupling component and the basic substance are from 0.1 to 10 parts by weight, and an amount of up to 20 parts by weight, respectively, per part by weight of the diazo compound.
Claim 12
Dependent Claim
32 words
A recording material as in claim 1, wherein the coupling component is used in an amount of from 0.1 to 10 parts by weight per part by weight of the diazo compound.
Claim 13
Dependent Claim
29 words
A recording material as in claim 1, wherein the treatment for removing the diazo compound is carried out after formation of the microcapsules but before mixing with other additives.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |