US5387463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent protective substrate provided with hard coating having glare reducing property, method for producing the same and polarizing plate
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1994-06-15
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Granted: 1995-02-07
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Expires: 2014-06-15
Abstract
Abstract The present invention provides a method for producing a triacetyl cellulose film excellent in not only glare reducing property but also transparency and further excellent in the resolution and contrast and, at the same time, having good surface hardness and solvent resistance; a triacetyl cellulose film produced by the method; and a polarizing plate using the triacetyl cellulose film. A coating composition consisting essentially of a resin bead having a refractive index of 1.40 to 1.60 and an ionizing radiation curing resin composition is coated on a transparent substrate material, and the coated substrate material is irradiated with an ionizing radiation to cure the ionizing radiation curing resin. According to the present invention, when an acetyl cellulose film is used as the transparent substrate material, even though the film is saponified with an alkali, no increase in the haze value occurs and a triacetyl cellulose film provided with a hard coat having a glare reducing property can be obtained. when the ionizing radiation curing resin comprises a polyester acrylate and a polyurethane acrylate, the resultant coating is excellent in the hardness and impact resistance. This film is laminated on a polarizing film to provide a polarizing plate.
Inventors
- 👤 Norinaga Nakamura
- 👤 Yugo Noritake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:25
CPC Classifications
B; B32; B32B; B32B23/00; B32B23/04; B32B23/08; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/046; G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/14; G02B1/16; G02B5/00; G02B5/30; C08J2433/00; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/259; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
A method for producing a transparent protective article provided with a hard coat having a glare reducing property, comprising the steps of: coating the surface of a transparent substrate material with an uncured coating composition comprising resin beads having a refractive index of 1.40 to 1.60 and an ionizing radiation curing acrylic resin composition, said resin beads comprising a resin selected from the group consisting of PMMA (polymethyl methacrylate) beads, polycarbonate beads, polystyrene beads, polyacrylstyrene beads and polyvinyl chloride beads; and irradiating the surface of the uncured coating composition with an ionizing radiation to cure the coating to form a hard coat having transparency and a glare reducing property.
Claim 2
Independent Claim
109 words
A method for producing a transparent protective article provided with a hard coat having a glare reducing property, comprising the steps of: coating the surface of a transparent substrate material with an uncured coating composition comprising resin beads having a refractive index of 1.40 to 1.60 and an ionizing radiation curing acrylic resin composition, said resin beads comprising a resin selected from the group consisting of PMMA (polymethyl methacrylate) beads, polycarbonate beads, polystyrene beads, polyacrylstyrene beads and polyvinyl chloride beads; and irradiating the surface of the uncured coating composition with an ionizing radiation to cure the coating to form a hard coat having transparency and a glare reducing property.
Claim 3
Dependent Claim
46 words
The method according to claim 1, wherein said coating composition contains less than 0.1 part by weight, based on 100 parts by weight of the acrylic resin, of a silica bead having a particle diameter of 0.5 μm as a sedimentation preventive for the resin bead.
Claim 4
Dependent Claim
32 words
The method according to claim 2, wherein said coating composition contains 10 to 100 parts by weight, based on 100 parts by weight of the acrylic resin, of a solvent drying resin.
Claim 5
Dependent Claim
24 words
The method according to claim 2, wherein said ionizing radiation curing acrylic resin composition consists essentially of a polyester acrylate and a polyurethane acrylate.
Claim 6
Dependent Claim
12 words
A transparent protective article produced by a method according to claim 2.
Claim 7
Dependent Claim
32 words
The method according to claim 1, wherein said coating composition contains 10 to 100 parts by weight, based on 100 parts by weight of the acrylic resin, of a solvent drying resin.
Claim 8
Dependent Claim
15 words
A transparent protective article produced by a method according to claim 1, 2 or 6.
Claim 9
Dependent Claim
18 words
A polarizing plate comprising a polarizing element and, laminated thereon, a transparent protective article according to claim 7.
Claim 10
Dependent Claim
24 words
The method according to claim 6, wherein said ionizing radiation curing acrylic resin composition consists essentially of a polyester acrylate and a polyurethane acrylate.
Claim 11
Dependent Claim
12 words
A transparent protective article produced by a method according to claim 6.
Claim 12
Dependent Claim
26 words
The method according to claim 1 or 2 wherein said ionizing radiation curing acrylic resin composition consists essentially of a polyester acrylate and a polyurethane acrylate.
Claim 13
Dependent Claim
12 words
A transparent protective article produced by a method according to claim 11.
Claim 14
Independent Claim
112 words
A method for producing a transparent protective article provided with a hard coat having a glare reducing property, comprising the steps of: coating the surface of a transparent substrate material with an uncured coating composition consisting essentially of (i) resin beads having a refractive index of 1.40 to 1.60 and (ii) an ionizing radiation curing acrylic resin composition; wherein said resin beads are formed from one or more resins selected from the group consisting of PMMA (polymethyl methacrylate), polycarbonate, polystyrene, polyacrylstyrene and polyvinyl chloride; irradiating the surface of the uncured coating composition with an ionizing radiation to cure the coating to form a hard coat having transparency and a glare reducing property.
Claim 15
Independent Claim
112 words
A method for producing a transparent protective article provided with a hard coat having a glare reducing property, comprising the steps of: coating the surface of a transparent substrate material with an uncured coating composition consisting essentially of (i) resin beads having a refractive index of 1.40 to 1.60 and (ii) an ionizing radiation curing acrylic resin composition; wherein said resin beads are formed from one or more resins selected from the group consisting of PMMA (polymethyl methacrylate), polycarbonate, polystyrene, polyacrylstyrene and polyvinyl chloride; irradiating the surface of the uncured coating composition with an ionizing radiation to cure the coating to form a hard coat having transparency and a glare reducing property.
References Cited (Backward Citations)
US3933875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |