US4682194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive recording material
Assignee: Fujifilm Holdings Corp
•
Filing: 1986-11-17
•
Granted: 1987-07-21
•
Expires: 2006-11-17
Abstract
Abstract A heat-sensitive recording material is described, comprising a support comprising thereon a layer containing microcapsules containing a leuco dye and an organic solvent in a core thereof and a color developer outside of said microcapsules capable of reacting with said leuco dye to develop a color, wherein a glass transition point of said microcapsule wall is from about 60° C. to 200° C.
Inventors
- 👤 Toshimasa Usami
- 👤 Toshiharu Tanaka
- 👤 Shohei Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M2205/00; B41M2205/04; B41M5/124; B41M5/165; B41M5/28; B41M5/287; B41M5/323; B41M5/333; B41M5/3333; B41M5/3335; B41M5/337; B41M5/3375; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
65 words
A heat-sensitive recording material comprising a support and a recording layer comprising microcapsules containing a leuco dye and an organic solvent in a core thereof and a color developer outside of said microcapsules capable of reacting with said leuco dye to produce a color, said microcapsules having walls being of a polymer having a glass transition point of from about 60° C. to 200° C.
Claim 2
Dependent Claim
65 words
A heat-sensitive recording material comprising a support and a recording layer comprising microcapsules containing a leuco dye and an organic solvent in a core thereof and a color developer outside of said microcapsules capable of reacting with said leuco dye to produce a color, said microcapsules having walls being of a polymer having a glass transition point of from about 60° C. to 200° C.
Claim 3
Dependent Claim
21 words
A heat-sensitive recording material as in claim 1, wherein said glass transition point is from about 70° C. to 150° C.
Claim 4
Dependent Claim
18 words
A heat-sensitive recording material as in claim 1, wherein said microcapsule further contains a glass transition point modifier.
Claim 5
Dependent Claim
27 words
A heat-sensitive recording material as in claim 3, wherein a glass transition modifier is a carbamic acid ester, an aromatic methoxy compound or an organic sulfonamide compound.
Claim 6
Dependent Claim
18 words
A heat-sensitive recording material as in claim 3, wherein said glass transition point modifier is a phenol compound.
Claim 7
Dependent Claim
16 words
A heat-sensitive recording material as in claim 5, wherein said glass transition point modifier is p-benzyloxyphenol.
Claim 8
Dependent Claim
23 words
A heat-sensitive recording material as in claim 6, wherein said microcapsule wall being of a polymer is polyurethane, polyurea or a mixuture thereof.
Claim 9
Dependent Claim
28 words
A heat-sensitive recording material as in claim 1, wherein said leuco dye has a partial skeletal structure, which undergoes cleavage or fission on contact with a color developer.
Claim 10
Dependent Claim
31 words
A heat-sensitive recording material as in claim 8, wherein said leuco dye has a partial skeletal structure of a lactone, a lactam, a sultone, a spiropyran, an ester or an amide.
Claim 11
Dependent Claim
28 words
A heat-sensitive recording material as in claim 1, wherein said color developer is a phenol compound, an organic acid or metal salts thereof, or a hydroxybenzoic acid ester.
Claim 12
Dependent Claim
25 words
A heat-sensitive recording material as in claim 10, wherein said phenol compound and an organic acid is melt at about 50° C. to 250° C.
Claim 13
Dependent Claim
22 words
A heat-sensitive recording material as in claim 1, wherein said organic solvent has a boiling point of at least about 180° C.
Claim 14
Dependent Claim
26 words
A heat-sensitive recording material as in claim 1, wherein said recording layer has a non-volatile matter content of from about 2.5 to 25 g/m 2 .
Claim 15
Dependent Claim
27 words
A heat-sensitive recording material as in claim 1, wherein said microcapsule wall being of a polymer is polyurethane, polyurea, polyamide, polyester, ureaformaldehyde resin or a mixture thereof.
Claim 16
Dependent Claim
23 words
A heat-sensitive recording material as in claim 1, wherein said microcapsule wall being of a polymer is polyurethane, polyurea or a mixture thereof.
References Cited (Backward Citations)
JPS5845090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |