Patent JPS5953875A successfully refreshed from Google Patents.
US4237185A
Expired / Lapsed
US
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Radiation curable transparentizing resin systems, methods and products
Assignee: Richardson Co
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Filing: 1979-01-22
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Granted: 1980-12-02
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Expires: 1999-01-22
Abstract
Abstract Cellulose materials such as paper and card stocks are provided in a generally transparent or so-called transparentized form while substantially maintaining the initial strength and stiffness of the pretreated stock. A generally opaque stock is treated with a solventless resin system which is cured by actinic radiation in order to thereby transparentize the stock without subjecting it to lengthy and relatively severe wetting conditions.
Inventors
- 👤 Louis J. Lombardi
- 👤 Roy J. Coyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:39
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/775; G03C1/785; B; B41; B41M; B41M7/00; B41M7/0045; C; C08; C08F; C08F251/00; C08F251/02; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/18; D21H17/19; Y; Y10; Y10S; Y10S428/00; Y10S428/918; Y10T; Y10T428/00; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
136 words
A transparentized cellulosic product comprising: a cellulosic stock material having a preselected initial strength and stiffness, said cellulosic stock material having been transparentized in the absence of a solvent by radiation curing of a solventless, radiation-curable resin system while that resin system is within said cellulosic stock material, said stock material having been treated with said resin system to include the resin system within the stock material to an extent sufficient that the stock is transparentized when subjected to actinic radiation, said sufficient extent being limited in order to form a transparentized cellulosic product having a strength and stiffness substantially the same as said initial strength and stiffness, said solventless, radiation-curable resin system including an acrylate monomer, a photosensitizer and an acrylate oligomer, said acrylate oligomer being a diacrylate oligomer derivative of an aliphatic/bisphenol-A diepoxide blend.
Claim 2
Dependent Claim
136 words
A transparentized cellulosic product comprising: a cellulosic stock material having a preselected initial strength and stiffness, said cellulosic stock material having been transparentized in the absence of a solvent by radiation curing of a solventless, radiation-curable resin system while that resin system is within said cellulosic stock material, said stock material having been treated with said resin system to include the resin system within the stock material to an extent sufficient that the stock is transparentized when subjected to actinic radiation, said sufficient extent being limited in order to form a transparentized cellulosic product having a strength and stiffness substantially the same as said initial strength and stiffness, said solventless, radiation-curable resin system including an acrylate monomer, a photosensitizer and an acrylate oligomer, said acrylate oligomer being a diacrylate oligomer derivative of an aliphatic/bisphenol-A diepoxide blend.
Claim 3
Dependent Claim
38 words
The product of claim 1, wherein said initial strength and stiffness of the cellulosic stock material is expressed as having a weight within the range of between 9 pounds up to as high as that of card stock.
Claim 4
Dependent Claim
18 words
The product of claim 1, comprising a substantially transparent card having a thickness as great as 1 millimeter.
Claim 5
Dependent Claim
29 words
The product of claim 1, wherein said acrylate monomer is selected from the group consisting of hexanediol diacrylate, stearyl methacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, pentaerythritol diacrylate, and blends thereof.
Claim 6
Dependent Claim
16 words
The product of claim 1, wherein said photosensitizer is an aromatic ketone or a tertiary amine.
Claim 7
Dependent Claim
10 words
The product of claim 1, wherein said photosensitizer is benzophenone.
Claim 8
Dependent Claim
58 words
The product of claim 1, wherein said solventless, radiation-curable resin system includes about 20 to about 70 weight percent of said acrylate monomer, about 5 to about 30 weight percent of said photosensitizer, about 15 to about 60 weight percent of said acrylate oligomer, and about 0 to about 15 weight percent of a vinyl aromatic/alkyl alcohol copolymer.
Claim 9
Dependent Claim
19 words
The product of claim 3, wherein said vinyl aromatic/alkyl alcohol copolymer is a copolymer of styrene and allyl alcohol.
Claim 10
Dependent Claim
35 words
The product of claim 1, wherein said limited sufficient extent includes beginning said subjecting to actinic radiation within a relatively short period of time after the stock material has been treated with the resin system.
Claim 11
Dependent Claim
22 words
The product of claim 9, wherein said relatively short period of time is between about 10 seconds and about a few minutes.
Claim 12
Dependent Claim
21 words
The product of claim 9, wherein said relatively short period of time is between about 20 seconds and about 2 minutes.
Claim 13
Dependent Claim
124 words
A transparentized cellulosic product comprising: a cellulosic stock material having a preselected initial strength and stiffness, said cellulosic stock material having been solventlessly transparentized by treating to generally saturate said cellulosic stock material in the absence of a solvent in order in include therewithin a solventless, radiation-curable resin system, and subjecting the resin-saturated cellulosic stock material to a source of actinic radiation to cure the resin system while within the cellulosic stock material for transparentizing the same, said transparentized cellulosic product having a transparentized strength and stiffness substantially the same as said initial strength and stiffness, said solventless, radiation-curable resin system including an acrylate monomer, a photosensitizer and an acrylate oligomer, said acrylate oligomer being a diacrylate oligomer derivative of an aliphatic/bisphenol-A diepoxide blend.
Claim 14
Dependent Claim
124 words
A transparentized cellulosic product comprising: a cellulosic stock material having a preselected initial strength and stiffness, said cellulosic stock material having been solventlessly transparentized by treating to generally saturate said cellulosic stock material in the absence of a solvent in order in include therewithin a solventless, radiation-curable resin system, and subjecting the resin-saturated cellulosic stock material to a source of actinic radiation to cure the resin system while within the cellulosic stock material for transparentizing the same, said transparentized cellulosic product having a transparentized strength and stiffness substantially the same as said initial strength and stiffness, said solventless, radiation-curable resin system including an acrylate monomer, a photosensitizer and an acrylate oligomer, said acrylate oligomer being a diacrylate oligomer derivative of an aliphatic/bisphenol-A diepoxide blend.
Claim 15
Dependent Claim
21 words
The product of claim 14, wherein said treating includes dipping the stock material within a supply of the solventless resin system.
Claim 16
Dependent Claim
29 words
The product of claim 14, wherein said subjecting with actinic radiation begins within a relatively short period of time after said treating to generally saturate the cellulosic stock material.
Claim 17
Dependent Claim
22 words
The product of claim 16, wherein said relatively short period of time is between about 10 seconds and about a few minutes.
Claim 18
Dependent Claim
58 words
The product of claim 12, wherein said solventless, radiation-curable resin system includes about 20 to about 70 weight percent of said acrylate monomer, about 5 to about 30 weight percent of said photosensitizer, about 15 to about 60 weight percent of said acrylate oligomer, and about 0 to about 15 weight percent of a vinyl aromatic/alkyl alcohol copolymer.
Claim 19
Independent Claim
146 words
A method for producing transparentized cellulosic material having approximately the same strength and stiffness of the original untransparentized cellulosic stock material comprising: selecting a cellulosic stock material; treating the stock in the absence of a solvent by including therewithin a solventless, radiation-curable resin system to an extent sufficient that the stock is transparentized when subjected to actinic radiation, said sufficient extent being limited in order to form a transparentized cellulosic product without significantly reducing said original strength and stiffness, said solventless, radiation-curable resin system is formulated by mixing together an acrylate monomer, a photosensitizer, and an acrylate oligomer, said acrylate oligomer being a diacrylate oligomer derivative of an aliphatic/bisphenol-A diepoxide blend; and curing the resin-treated cellulosic stock material for transparentizing the same to a generally transparent product having a strength and stiffness approximately the same as said strength and stiffness of the untransparentized cellulosic stock material.
Claim 20
Independent Claim
146 words
A method for producing transparentized cellulosic material having approximately the same strength and stiffness of the original untransparentized cellulosic stock material comprising: selecting a cellulosic stock material; treating the stock in the absence of a solvent by including therewithin a solventless, radiation-curable resin system to an extent sufficient that the stock is transparentized when subjected to actinic radiation, said sufficient extent being limited in order to form a transparentized cellulosic product without significantly reducing said original strength and stiffness, said solventless, radiation-curable resin system is formulated by mixing together an acrylate monomer, a photosensitizer, and an acrylate oligomer, said acrylate oligomer being a diacrylate oligomer derivative of an aliphatic/bisphenol-A diepoxide blend; and curing the resin-treated cellulosic stock material for transparentizing the same to a generally transparent product having a strength and stiffness approximately the same as said strength and stiffness of the untransparentized cellulosic stock material.
Claim 21
Dependent Claim
62 words
The method of claim 17, wherein said solventless, radiation-curable resin system is formulated by mixing together about 20 to about 70 weight percent of said acrylate monomer, about 5 to about 30 weight percent of said photosensitizer, about 15 to about 60 weight percent of said acrylate oligomer, and about 0 to about 15 weight percent of a vinyl aromatic/alkyl alcohol copolymer.
Claim 22
Dependent Claim
19 words
The method of claim 17, wherein said treating step includes saturating the solventless resin system into the stock material.
Claim 23
Dependent Claim
22 words
The method of claim 17, wherein said treating step includes dipping the stock material within a supply of the solventless resin system.
Claim 24
Dependent Claim
28 words
The method of claim 17, wherein said treating step includes dipping the stock material into a supply of the solventless resin system and scraping off any excess resin.
Claim 25
Dependent Claim
28 words
The method of claim 17, wherein said limited sufficient extent includes beginning said curing step within a relatively short period of time after said treating step is begun.
Claim 26
Dependent Claim
22 words
The method of claim 22, wherein said relatively short period of time is between about 10 seconds and about a few minutes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |