US5560796A
Expired / Lapsed
US
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Transfer sheet
Assignee: Sakura Color Products Corp
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Filing: 1994-12-20
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Granted: 1996-10-01
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Expires: 2014-12-20
Abstract
Abstract The present invention provides a transfer sheet comprising a releasable base and, as disposed successively thereon, at least one picture printing layer, a UV-curing adhesive layer and a release layer and a transfer process employing a transfer sheet which comprises peeling off the releasable base from the sheet, transferring the printing layer and UV-curing adhesive layer as a unit to a substrate and curing the adhesive layer by UV irradiation.
Inventors
- 👤 Yasuyuki Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:59
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/4505; C04B41/4511; B; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/17; B44C1/1712; B44C1/1716; C23; C23D; C23D5/00; C23D5/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/2852; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31855
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
52 words
A transfer sheet comprising a releasable base and, as disposed successively thereon, at least one picture printing layer, a UV-curing adhesive layer and a release layer, the UV-curing adhesive layer containing an alkyl (meth)acrylate polymer having a molecular weight of 300,000 to 1,000,000 and the alkyl ester moiety having 1-14 carbon atoms.
Claim 2
Dependent Claim
52 words
A transfer sheet comprising a releasable base and, as disposed successively thereon, at least one picture printing layer, a UV-curing adhesive layer and a release layer, the UV-curing adhesive layer containing an alkyl (meth)acrylate polymer having a molecular weight of 300,000 to 1,000,000 and the alkyl ester moiety having 1-14 carbon atoms.
Claim 3
Dependent Claim
29 words
The transfer sheet according to claim 1 wherein the alkyl (meth)acrylate polymer has a molecular weight of 400,000 to 1,000,000 and the alkyl ester moiety has 4-12 carbon atoms.
Claim 4
Dependent Claim
16 words
The transfer sheet according to claim 1 wherein the picture printing layer comprises a UV-curing resin.
Claim 5
Dependent Claim
17 words
The transfer sheet according to claim 1 wherein the picture printing layer comprises a non-variable color layer.
Claim 6
Dependent Claim
17 words
The transfer sheet according to claim 1 wherein the picture printing layer comprises a reversible thermochromic layer.
Claim 7
Dependent Claim
22 words
The transfer sheet according to claim 1 wherein the picture printing layer comprises a non-variable color layer and a reversible thermochromic layer.
Claim 8
Dependent Claim
19 words
The transfer sheet according to any one of claims 1-6 wherein the printing layer comprises a silane coupling agent.
Claim 9
Dependent Claim
54 words
The transfer sheet according to claim 1 wherein the UV-curing adhesive layer comprises a UV-curing adhesive composition prepared using 0.1 to 15 parts by weight of a crosslinking agent or a curing agent and 10 to 70 parts by weight of a UV-curing resin per 100 parts by weight of the alkyl (meth)acrylate polymer.
Claim 10
Dependent Claim
38 words
The transfer sheet according to claim 8 wherein the UV-curing resin comprises 100 parts of a photopolymerizable prepolymer or the total amount of a photopolymerizable prepolymer and photopolymerizable monomer, and 0.3 to 20 parts of a photopolymerization initiator.
Claim 11
Dependent Claim
29 words
The transfer sheet according to claim 9 wherein the photopolymerizable prepolymer is at least one member selected from polyether (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate and alkyd (meth)acrylate.
Claim 12
Dependent Claim
68 words
The transfer sheet according to claim 9 wherein the photopolymerizable monomer is at least one member selected from 2-ethylhexyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxy (meth)acryloyl phosphate, tetrahydrofurfuryl (meth)acrylate, (meth)acrylate of tetrafurfuryl derivative, dicyclopentenyl (meth)acrylate, dicyclopentenyloxyethyl (meth)acrylate, 1,3-butanediol (meth)acrylate, 1,4-butanediol (meth)acrylate, 1,6-hexanediol di(meth)acrylate, diethylene glycol (meth)acrylate, neopentyl glycol di(meth)acrylate, polyethylene glycol 400 di(meth)acrylate, hydroxypivalic acid ester neopentyl glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate and dipentaerythritol hexane (meth)acrylate.
Claim 13
Dependent Claim
21 words
The transfer sheet according to claim 9 wherein the photopolymerization initiator is a radical polymerization initiator or a cationic polymerization initiator.
Claim 14
Dependent Claim
17 words
The transfer sheet according to claim 8 wherein the UV-curing adhesive composition further contains a vinyl monomer.
Claim 15
Dependent Claim
20 words
The transfer sheet according to claim 1 wherein the alkyl (meth)acrylate polymer is partially substituted by an α,β-unsaturated carboxylic acid.
Claim 16
Dependent Claim
28 words
The transfer sheet according to claim 14 wherein the α,β-unsaturated carboxylic acid is at least one member selected from (meth)acrylic acid, itaconic acid, maleic acid and fumaric acid.
Claim 17
Dependent Claim
45 words
A method for transfer printing employing a transfer sheet claimed in claim 1, which comprises peeling off the releasable base from the sheet, transferring the printing layer and UV-curing adhesive layer as a unit to a substrate and curing the adhesive layer by UV irradiation.
Claim 18
Dependent Claim
16 words
The method according to claim 1 wherein said substrate is pretreated with a silane coupling agent.
Claim 19
Dependent Claim
15 words
The method according to claim 1 wherein said printing layer contains a silane coupling agent.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1999-10-01 | 2000-04-01 | 2000-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-01 | 2004-04-01 | 2004-10-01 | $3760.00 | Window Closed / Lapsed |
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