US5324583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal transfer sheet
Assignee: Mitsubishi Chemical Corp
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Filing: 1992-12-17
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Granted: 1994-06-28
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Expires: 2012-12-17
Abstract
Abstract A thermal transfer sheet having a base film, a heat resistant layer which is formed on one surface of the base film by coating a composition which contains (A) a compound having at least two (meth)acryloyl groups and (B) at least one polymer selected from the group consisting of a syrene-alkyl (meth)acrylate copolymer and an alpha -methylstyrene-alkyl (meth)acrylate copolymer and cured with an activation energy ray, and heat transfer coloring material layer on the other surface of the base film, which sheet has maintains good runnability and prevents deposition of a thermal head tailings.
Inventors
- 👤 Yoshihide Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:30
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/405; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31721; Y10T428/31725; Y10T428/3175; Y10T428/31786; Y10T428/31855
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
74 words
A thermal transfer sheet comprising: (i) a base film, (ii) a cured heat resistant layer which is formed on one side of said base film from (A) at least one compound having at least two (meth)acryloyl groups, and (B) at least one polymer selected from the group consisting of a styrene-alkyl (meth)acrylate copolymer and an α-methyl-styrene-alkyl (meth)acrylate copolymer, and (iii) a heat transfer coloring material layer on the other side of said base film.
Claim 2
Dependent Claim
74 words
A thermal transfer sheet comprising: (i) a base film, (ii) a cured heat resistant layer which is formed on one side of said base film from (A) at least one compound having at least two (meth)acryloyl groups, and (B) at least one polymer selected from the group consisting of a styrene-alkyl (meth)acrylate copolymer and an α-methyl-styrene-alkyl (meth)acrylate copolymer, and (iii) a heat transfer coloring material layer on the other side of said base film.
Claim 3
Dependent Claim
38 words
The thermal transfer sheet according to claim 1, wherein (a) comprises at least one compound selected from the group consisting of trimethylolpropane tri(meth)acrylate, pentaglycerol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerithritol hexa(meth)acrylate, ethyleneglycol (meth)acrylate, propyleneglycol di(meth)acrylate, pentaerythritol tri(meth)acrylate and butyleneglycol di(meth)acrylate.
Claim 4
Dependent Claim
54 words
The thermal transfer sheet according to claim 1, wherein (B) comprises a copolymer comprising styrene or α-methylstyrene and at least one (meth)acrylate selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, ter.-butyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, hexyl (meth)acrylate, octyl (meth) acrylate, dodecyl (meth) acrylate and stearyl (meth) acrylate.
Claim 5
Dependent Claim
23 words
The thermal transfer sheet according to claim 1, wherein (B) comprises a polymer having a number average molecular weight of 1000 to 10,000.
Claim 6
Dependent Claim
20 words
The thermal transfer sheet according to claim 1, wherein said heat resistant layer is further formed from a copolymerizable monomer.
Claim 7
Dependent Claim
18 words
The thermal transfer sheet according to claim 1, wherein said heat resistant layer is formed using an initiator.
Claim 8
Dependent Claim
23 words
The thermal transfer sheet according to claim 1, wherein said heat resistant layer further contains an electrically conductive powder or an antistatic agent.
Claim 9
Dependent Claim
19 words
The thermal transfer sheet according to claim 1, wherein the heat resistant layer is coated onto the base film.
Claim 10
Dependent Claim
20 words
The thermal transfer sheet according to claim 1, wherein the heat resistant layer was cured by an activation energy ray.
Claim 11
Dependent Claim
29 words
The thermal transfer sheet according to claim 1, wherein (A) comprises a reaction product of a di- or polyhydric alcohol and a compound having an acryloyl or methacryloyl group.
Claim 12
Dependent Claim
29 words
The thermal transfer sheet according to claim 1, wherein (B) comprises a polymer consisting essentially of one or more of styrene or α-methylstyrene and one or more alkyl (meth)acrylates.
Claim 13
Dependent Claim
30 words
The thermal transfer sheet according to claim 1, wherein the total amount of (B) is from 0.1 to 30% by weight based on the weight of the heat resistant layer.
Claim 14
Dependent Claim
27 words
The thermal transfer sheet according to claim 1, wherein (A) and (B) are present in the heat resistant layer in a weight ratio of 99.9:0.1 to 20:30.
Claim 15
Dependent Claim
27 words
The thermal transfer sheet according to claim 1, wherein the heat resistant layer is further formed from one or more of a photopolymerizable oligomer or a photosensitizer.
Claim 16
Dependent Claim
37 words
The thermal transfer sheet according to claim 1, wherein the heat resistant layer further contains one or more of organic or inorganic particles in an amount sufficient to improve the slipping properties of the thermal transfer sheet.
Claim 17
Dependent Claim
21 words
The thermal transfer sheet according to claim 1, wherein the heat resistant layer has a thickness from 0.05 to 5 micrometers.
Claim 18
Dependent Claim
35 words
The thermal transfer sheet according to claim 1, wherein the base film comprises a film selected from the group consisting of a polyester film, a polyimide film, an aromatic polyamide film, and a polycarbonate film.
Claim 19
Dependent Claim
27 words
The thermal transfer sheet according to claim 1, wherein the base film comprises a biaxially oriented polyester film having a thickness of from 2 to 15 micrometers.
Claim 20
Dependent Claim
21 words
The thermal transfer sheet according to claim 1, wherein the heat transfer coloring material comprises a binder resin and a colorant.
Claim 21
Dependent Claim
34 words
The thermal transfer sheet according to claim 1, which contains an intermediate layer between the base film and the heat resistant layer or between the base film and the heat transfer coloring material layer.
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) | 1997-06-27 | 1997-12-27 | 1998-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-27 | 2001-12-27 | 2002-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-27 | 2005-12-27 | 2006-06-28 | $7700.00 | Window Closed / Lapsed |