US4650743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical coating composition
Assignee: EIDP Inc
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Filing: 1985-07-31
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Granted: 1987-03-17
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Expires: 2005-07-31
Abstract
Abstract An optical coating composition comprising a C 1-3 hydroxyalkyl monofunctional acrylate monomer having dissolved therein an oligomer having a molecular weight of at least 500 and a photoinitiator system.
Inventors
- 👤 Lory Galloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:20
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/04; C08L33/06; G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/254; G11B7/2542; G11B7/258; G11B7/2585; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
An optical recording medium comprising a dimensionally stable substrate, a layer of light-absorptive material, and an optical layer coated on the light-absorptive layer by a method comprising the sequential steps of: 1. applying to the light-absorptive layer a liquid layer of a coating composition comprising a solution of: a. liquid photohardenable hydroxy-lower alkyl monoacrylate having 1 to 3 carbons in said alkyl group having dissolved therein b. oligomer having a molecular weight of at least 500; and c. 0.05-10% wt. photoinitiator system, the liquid uncured solution having a viscosity of at least 10 cP and surface tension of less than 36 dynes/cm at coating temperature and the solid cured composition having a transmissivity of at least 88% to light having a wavelength of 488-830 nm; and 2.
Claim 2
Dependent Claim
127 words
An optical recording medium comprising a dimensionally stable substrate, a layer of light-absorptive material, and an optical layer coated on the light-absorptive layer by a method comprising the sequential steps of: 1. applying to the light-absorptive layer a liquid layer of a coating composition comprising a solution of: a. liquid photohardenable hydroxy-lower alkyl monoacrylate having 1 to 3 carbons in said alkyl group having dissolved therein b. oligomer having a molecular weight of at least 500; and c. 0.05-10% wt. photoinitiator system, the liquid uncured solution having a viscosity of at least 10 cP and surface tension of less than 36 dynes/cm at coating temperature and the solid cured composition having a transmissivity of at least 88% to light having a wavelength of 488-830 nm; and 2.
Claim 3
Dependent Claim
12 words
exposing the coated layer to actinic radiation for a time sufficient to
Claim 4
Dependent Claim
12 words
exposing the coated layer to actinic radiation for a time sufficient to
Claim 5
Dependent Claim
38 words
effect substantially complete photohardening of the monoacrylate. 2. The optical medium of claim 1 in which the monoacrylate component a. of the coating composition is selected from the group consisting of 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate and mixtures thereof.
Claim 6
Dependent Claim
20 words
The optical medium of claim 1 in which the oligomer component b. of the coating composition is acrylated epoxy resin.
Claim 7
Dependent Claim
17 words
The optical medium of claim 1 in which the coating composition has a non-ionic surfactant dissolved therein.
Claim 8
Dependent Claim
21 words
The optical medium of claim 4 in which the surfactant component of the coating composition is a fluorinated acrylate ester oligomer.
Claim 9
Dependent Claim
32 words
The optical medium of claim 1 in which the viscosity of the liquid uncured solution at the coating temperature is 10-100 cP and the liquid uncured solution is applied by spin coating.
Claim 10
Dependent Claim
17 words
The medium of claim 1 in which the light-absorptive layer is a thin layer of polymeric dye.
Claim 11
Dependent Claim
17 words
The medium of claim 7 in which the substrate is a layer of polymer coated on aluminum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |