US5945174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylate polymer release coated sheet materials and method of production thereof
Assignee: 3M Innovative Properties Co
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Filing: 1998-07-01
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Granted: 1999-08-31
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Expires: 2018-07-01
Abstract
Abstract Sheet materials according to the present invention comprise a sheet material substrate, such as for example a film or paper sheet, with a polymer release coating overlying and adhered to a surface of the sheet material substrate. Single and multilayer release coatings can be formed on the substrate by vapor deposition of silicone acrylates and/or fluorinated acrylates. These coatings can be applied in thickness of 0.05 micron to 1.0 micron to achieve a range of release properties. These coatings can be applied in a very thin single layer on relatively smooth substrates or in a multilayer form on rough substrates such as paper. The new coating process described here has lower process and materials costs, improved adhesion, low slip, and excellent release characteristics.
Inventors
- 👤 David G. Shaw
- 👤 Eric Dawson
- 👤 Daniel Cline
- 👤 Marc Langlois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:01
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/60; B05D7/00; B05D7/24; C; C08; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/068; C09; C09D; C09D155/00; C09D155/005; C09J; C09J7/00; C09J7/40; C09J7/401; C09J2301/00; C09J2301/40; C09J2301/416; C09J2433/00; C09J2433/005; C09J2483/00; C09J2483/005; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/3154; Y10T428/31652; Y10T428/31663; Y10T428/31786; Y10T428/3179; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
A method for forming a coated sheet material comprising: providing a first radiation curable composition comprising at least one acrylate monomer having a molecular weight in the range of about 150 to 600 and a viscosity of no more than 200 centistokes at 25° C., providing a second composition which is incompatible with said first composition and comprises at least one acrylate monomer having a molecular weight in the range of about 200 to 3000, vaporizing said first and second compositions, mixing the vapors of said first and second compositions, condensing the mixed vapors of said first and second compositions on a substrate to form a coating, and exposing the coating to radiation to cure and crosslink the compositions and form a compatible polymer comprised of the normally incompatible compositions.
Claim 2
Independent Claim
130 words
A method for forming a coated sheet material comprising: providing a first radiation curable composition comprising at least one acrylate monomer having a molecular weight in the range of about 150 to 600 and a viscosity of no more than 200 centistokes at 25° C., providing a second composition which is incompatible with said first composition and comprises at least one acrylate monomer having a molecular weight in the range of about 200 to 3000, vaporizing said first and second compositions, mixing the vapors of said first and second compositions, condensing the mixed vapors of said first and second compositions on a substrate to form a coating, and exposing the coating to radiation to cure and crosslink the compositions and form a compatible polymer comprised of the normally incompatible compositions.
Claim 3
Dependent Claim
47 words
A method according to claim 1 wherein said step of condensing the mixed vapors of the prepolymer composition and forming a coating thereof comprises forming said coating with a thickness of no more than 0.2 micron on an acrylate polymer coated surface of a sheet material substrate.
Claim 4
Dependent Claim
44 words
A method according to claim 1 wherein said vaporizing step comprises vaporizing the first composition having a silicon-containing or fluorine-containing acrylate monomer and the second composition having a polyfunctional acrylate monomer having a molecular weight in the range of from about 200 to 600.
Claim 5
Dependent Claim
68 words
A method according to claim 1 wherein said steps of providing said first and second compositions comprises storing said first and second compositions in separate containers, and including the step of feeding said first and second compositions from their respective containers to an evaporator chamber and atomizing said first and second compositions within the evaporator chamber to evaporate and mix the vapors of said first and second compositions.
Claim 6
Dependent Claim
24 words
A method according to claim 4 wherein said atomizing step comprises mixing the first and second compositions just prior to entering an atomizer nozzle.
Claim 7
Dependent Claim
35 words
A method according to claim 4 wherein said atomizing step comprises discharging the first and second compositions from respective individual atomizer nozzles located in proximity to one another so that the atomized compositions will mix.
Claim 8
Independent Claim
96 words
A method for forming a coated sheet material comprising: depositing first and second prepolymer layers of a radiation curable material onto a surface of a sheet material substrate, the first and second layers being of differing composition, each layer comprising an acrylate, with at least one of said layers comprising a polyfunctional acrylate monomer having a ratio of its molecular weight to its number of acrylate groups (MW/Ac) of at least 150 and a polar acrylate monomer-having a dielectric constant of 4 or higher, and wherein said second layer comprises a silicon-containing or fluorine-containing acrylate monomer.
Claim 9
Independent Claim
96 words
A method for forming a coated sheet material comprising: depositing first and second prepolymer layers of a radiation curable material onto a surface of a sheet material substrate, the first and second layers being of differing composition, each layer comprising an acrylate, with at least one of said layers comprising a polyfunctional acrylate monomer having a ratio of its molecular weight to its number of acrylate groups (MW/Ac) of at least 150 and a polar acrylate monomer-having a dielectric constant of 4 or higher, and wherein said second layer comprises a silicon-containing or fluorine-containing acrylate monomer.
Claim 10
Dependent Claim
46 words
A method according to claim 7 wherein said step of depositing said second prepolymer layer is a vapor deposition step and comprises vaporizing said silicon-containing or fluorine-containing monomer and condensing said second layer at a thickness of no more than 0.2 micron onto said first layer.
References Cited (Backward Citations)
GB1095822A
Cited
US4537811A
Cited
US4201808A
Cited
US4177310A
Cited
US5125138A
Cited
US5032461A
Cited
US4842893A
Cited
US4490774A
Cited
US5097800A
Cited
US5018048A
Cited
US4647818A
Cited
US4696719A
Cited
US4781942A
Cited
US4954371A
Cited
US5023138A
Cited
US5021298A
Cited
US4873140A
Cited
EP0340935A2
Cited
US5082915A
Cited
US5075349A
Cited
WO1991015610A1
Cited
US5108782A
Cited
CA2052321A1
Cited
WO1992006243A1
Cited
US5084354A
Cited
US5147938A
Cited
EP0521605A2
Cited
US5232784A
Cited
US5607729A
Cited
US5418304A
Cited
WO1995010117A1
Cited
US5466491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |