US4946728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive paper for copying
Assignee: Lintec Corp
•
Filing: 1988-06-28
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Granted: 1990-08-07
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Expires: 2008-06-28
Abstract
Abstract In an adhesive paper for copying prepared by laminating an overlying sheet with a release sheet so that an adhesive layer coated on the bottom surface of said overlying sheet is in contact with the releasing surface of said release sheet, the improvement comprising a radiation-induced polymer layer having a glass transition temperature ranging from 50° to 200° C., applied to at least one edge face of said adhesive paper for copying, said radiation-induced polymer layer being formed by applying a solvent free radiation polymerizable composition to said edge face followed by irradiation curing. The presence of the radiation-induced polymer layer prevents an adhesive from squeezing out. The polymer layer, because of its specific glass transition temperature, will not break and fall off. Thus a copying machine will not be contaminated with squeezed adhesive or broken and fallen polymer layer during copying. Further, the solvent-free and radiation polymerizable nature of the polymer layer-forming composition ensures the sheets not to curl.
Inventors
- 👤 Takeshi Ikeda
- 👤 Akira Nozaki
- 👤 Kazuyoshi Ebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:12
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C09; C09J; C09J7/00; C09J7/20; G; G03; G03C; G03C11/00; G03C11/14; G03F; G03F7/00; G03G; G03G7/00; G03G7/0053; G03G7/0086; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/1457; Y10T428/24; Y10T428/24777; Y10T428/24802; Y10T428/24934; Y10T428/28; Y10T428/2809; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
147 words
In an adhesive paper for copying prepared by laminating an overlying sheet with a release sheet so that an adhesive layer coated on the bottom surface of said overlying sheet is in contact with the releasing surface of said release sheet, the improvement which comprises a radiation-induced polymer layer having a glass transition temperature ranging from 50° C. to 200° C., applied to at least one edge face of said adhesive paper for copying, said radiation-induced polymer layer being formed by applying a solvent free radiation polymerizable composition to said edge face followed by irradiation curing, said radiation polymerizable composition comprising a radiation polymerizable prepolymer and from 1 to 300 parts by weight, based on 100 parts by weight of said prepolymer, of at least one radiation polymerizable monomer, said radiation polymerizable prepolymer comprising a urethane acrylate oligomer having a molecular weight of from 1,000 to 10,000.
Claim 2
Dependent Claim
147 words
In an adhesive paper for copying prepared by laminating an overlying sheet with a release sheet so that an adhesive layer coated on the bottom surface of said overlying sheet is in contact with the releasing surface of said release sheet, the improvement which comprises a radiation-induced polymer layer having a glass transition temperature ranging from 50° C. to 200° C., applied to at least one edge face of said adhesive paper for copying, said radiation-induced polymer layer being formed by applying a solvent free radiation polymerizable composition to said edge face followed by irradiation curing, said radiation polymerizable composition comprising a radiation polymerizable prepolymer and from 1 to 300 parts by weight, based on 100 parts by weight of said prepolymer, of at least one radiation polymerizable monomer, said radiation polymerizable prepolymer comprising a urethane acrylate oligomer having a molecular weight of from 1,000 to 10,000.
Claim 3
Dependent Claim
66 words
The adhesive paper for copying according to claim 1 wherein said radiation polymerizable prepolymer comprises a urethane acrylate oligomer having a molecular weight of from 1,000 to 10,000 and up to about 50% by weight, based on the weight of said prepolymer, of at least one oligomer having a molecular weight of from 1,000 to 10,000 selected from polyester acrylate, epoxy acrylate and silicone acrylate oligomers.
Claim 4
Dependent Claim
48 words
The adhesive paper for copying according to claim 1 wherein said radiation polymerizable monomer is selected from trimethylolpropane triacrylate, tetramethylolmethane tetraacrylate, pentaerythritol triacrylate, pentaerythrytol tetraacrylate, dipentaerythrytol monohydroxypentaacrylate, dipentaerythrytol hexaacrylate, 1,4-butylene glycol diacrylate, 1,6-hexanediol diacrylate, polyethylene glycol diacrylate, oligoester acrylates, N-vinyl-2-pyrrolidone, 2-ethylhexyl acrylate, nonylphenoxypolyethylene glycol acrylate and 2-hydroxyethyl acrylate.
Claim 5
Dependent Claim
33 words
The adhesive paper for copying according to claim 1 wherein said radiation polymerizable composition further comprises up to about 10% by weight, based of the weight of the composition, of a polymerization initiator.
Claim 6
Dependent Claim
31 words
The adhesive paper for copying according to claim 4 wherein said polymerization initiator is selected from 2,2-diethoxyacetophenone, bezophenone, 4,4-bisdimethylaminobenzophenone, dibenzoyl, benzoin methyl ether, benzyl dimethyl ketal, 1-hydroxycyclohexyl phenylketone and azo compounds.
Claim 7
Dependent Claim
26 words
The adhesive paper for copying according to claim 1 wherein said radiation-induced polymer layer has a glass transition temperature of from 70° C. to 150° C.
Claim 8
Dependent Claim
26 words
The adhesive paper for copying according to claim 6 wherein said radiation-induced polymer layer has a glass transition temperature of from 80° C. to 130° C.
Claim 9
Dependent Claim
162 words
In an adhesive paper for copying prepared by laminating an overlying sheet with a release sheet so that an adhesive layer coated on the bottom surface of said overlying sheet is in contact with the releasing surface of said release sheet, the improvement which comprises a radiation-induced polymer layer having a glass transition temperature ranging from 50° to 200° C., applied to at least one edge face of said adhesive paper for copying, said radiation-induced polymer layer being formed by applying a solvent free radiation polymerizable composition to said edge face followed by irradiation curing, said radiation polymerizable composition comprising a radiation polymerizable prepolymer, 1 to 300 parts by weight, based on 100 parts by weight of said prepolymer, of at least one radiation polymerizable monomer and up to about 2,0% by weight, based on the weight of the composition, of a coloring agent, said radiation polymerizable prepolymer comprising a urethane acrylate oligomer having a molecular weight of from 1,000 to 10,000.
Claim 10
Dependent Claim
162 words
In an adhesive paper for copying prepared by laminating an overlying sheet with a release sheet so that an adhesive layer coated on the bottom surface of said overlying sheet is in contact with the releasing surface of said release sheet, the improvement which comprises a radiation-induced polymer layer having a glass transition temperature ranging from 50° to 200° C., applied to at least one edge face of said adhesive paper for copying, said radiation-induced polymer layer being formed by applying a solvent free radiation polymerizable composition to said edge face followed by irradiation curing, said radiation polymerizable composition comprising a radiation polymerizable prepolymer, 1 to 300 parts by weight, based on 100 parts by weight of said prepolymer, of at least one radiation polymerizable monomer and up to about 2,0% by weight, based on the weight of the composition, of a coloring agent, said radiation polymerizable prepolymer comprising a urethane acrylate oligomer having a molecular weight of from 1,000 to 10,000.
Claim 11
Dependent Claim
24 words
The adhesive paper for copying according to claim 8 wherein said coloring agent is selected from dyes having visible color, fluorescence dyes and pigments.
Claim 12
Dependent Claim
66 words
The adhesive paper for copying according to claim 8 wherein said radiation polymerizable prepolymer comprises a urethane acrylate oligomer having a molecular weight of from 1,000 to 10,000 and up to about 50% by weight, based on the weight of said prepolymer, of at least one oligomer having a molecular weight of from 1,000 to 10,000 selected from polyester acrylate, epoxy acrylate and silicone acrylate oligomers.
Claim 13
Dependent Claim
48 words
The adhesive paper for copying according to claim 8 wherein said radiation polymerizable monomer is selected from trimethylolpropane triacrylate, tetramethylolmethane tetraacrylate, pentaerythritol triacrylate, pentaerythrytol tetraacrylate, dipentaerythrytol monohydroxypentaacrylate, dipentaerythrytol hexaacrylate, 1,4-butylene glycol diacrylate, 1,6-hexanediol diacrylate, polyethylene glycol diacrylate, oligoester acrylates, N-vinyl-2-pyrrolidone, 2-ethylhexyl acrylate, nonylphenoxypolyethylene glycol acrylate and 2-hydroxyethyl acrylate.
Claim 14
Dependent Claim
33 words
The adhesive paper for copying according to claim 8 wherein said radiation polymerizable composition further comprises up to about 10% by weight, based of the weight of the composition, of a polymerization initiator.
Claim 15
Dependent Claim
31 words
The adhesive paper for copying according to claim 12 wherein said polymerization initiator is selected from 2,2-dietoxyacetophenone, bezophenone, 4,4-bisdimethylaminobenzophenone, dibenzoyl, benzoin methyl ether, benzyl dimethyl ketal, 1-hydroxycyclohexyl phenylketone and azo compounds.
Claim 16
Dependent Claim
25 words
The adhesive paper for copying according to claim 8 wherein said radiation-induced polymer layer has a glass transition temperature of from 70° to 150° C.
Claim 17
Dependent Claim
25 words
The adhesive paper for copying according to claim 14 wherein said radiation-induced polymer layer has a glass transition temperature of from 80° to 130° C.
References Cited (Backward Citations)
US4624893A
Cited
US4713274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |