Patent US4637904A successfully refreshed from Google Patents.
US4637904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding a polymeric layer onto a substrate
Assignee: Rohm and Haas Co
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Filing: 1983-11-14
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Granted: 1987-01-20
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Expires: 2003-11-14
Abstract
Abstract Process for forming a polymeric layer on a substrate comprises placing a substrate to be coated in a mold having a removable lid, injecting a liquid monomer into the mold and into contact with the surface of the substrate to be coated, holding the substrate in place in said mold prior to curing said monomer, radiation curing the liquid monomer, releasing the hold on said substrate prior to significant shrinkage of the curing liquid monomer, and venting said mold to atmospheric pressure at the portion of the mold remote from the surface of the substrate being coated and prior to significant shrinkage of said liquid monomer whereby the substrate moves toward the removable lid. Thereafter, the substrate, which now has a polymeric layer affixed thereto, is removed from the mold.
Inventors
- 👤 Nicholas A. Rounds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:21
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; B; B29; B29C; B29C37/00; B29C37/005; B29C70/00; B29C70/68; B29C70/78; B29D; B29D17/00; B29D17/005; G11B7/241; G11B7/242; G11B7/244; G11B7/263; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29C45/00; B29C67/00; B29C67/24; B29C67/246; B29K; B29K2033/00; B29K2033/04; B29K2105/00; B29K2105/0002; B29K2995/00; B29K2995/0018; B29K2995/0026
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
149 words
Process for forming a polymeric layer affixed to a substrate comprising placing a substrate to be coated in a mold having a removable lid, injecting a liquid monomer, having a viscosity of from about 3 centipoises to about 500 centipoises, into said mold and into contact with the surface of the substrate to be coated, holding the substrate in place in said mold prior to curing said monomer, radiation curing said liquid monomer, releasing the hold on said substrate prior to significant shrinkage of the curing liquid monomer, and venting said mold to atmospheric pressure at the portion of the mold remote from the surface of the substrate being coated and prior to significant shrinkage of said liquid monomer and said substrate moves toward said removable lid while said mold and said removable lid remain stationary, and removing the substrate having a polymeric layer affixed thereto from the mold.
Claim 2
Dependent Claim
149 words
Process for forming a polymeric layer affixed to a substrate comprising placing a substrate to be coated in a mold having a removable lid, injecting a liquid monomer, having a viscosity of from about 3 centipoises to about 500 centipoises, into said mold and into contact with the surface of the substrate to be coated, holding the substrate in place in said mold prior to curing said monomer, radiation curing said liquid monomer, releasing the hold on said substrate prior to significant shrinkage of the curing liquid monomer, and venting said mold to atmospheric pressure at the portion of the mold remote from the surface of the substrate being coated and prior to significant shrinkage of said liquid monomer and said substrate moves toward said removable lid while said mold and said removable lid remain stationary, and removing the substrate having a polymeric layer affixed thereto from the mold.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein said substrate is an information storage substrate.
Claim 4
Dependent Claim
13 words
A process according to claim 1 wherein said polymeric layer is optically transparent.
Claim 5
Dependent Claim
20 words
A process according to claim 1 wherein said polymeric layer is from about 2 mils to about 150 mils thick.
Claim 6
Dependent Claim
22 words
A process according to claim 1 wherein the polymeric layer has a uniform thickness within a tolerance of up to about ±10%.
Claim 7
Dependent Claim
13 words
A process according to claim 1 wherein said monomer comprises tripropylene glycol diacrylate.
Claim 8
Dependent Claim
13 words
A process according to claim 1 wherein said monomer comprises tetraethylene glycol diacrylate.
Claim 9
Dependent Claim
13 words
A process according to claim 1 wherein said monomer comprises neopentyl glycol diacrylate.
Claim 10
Dependent Claim
19 words
A process according to claim 1 wherein said liquid monomer comprises the diacrylate of ethoxylated and/or propoxylated neopentyl glycol.
Claim 11
Dependent Claim
13 words
A process according to claim 1 wherein said monomer comprises ethylene glycol diacrylate.
Claim 12
Dependent Claim
15 words
A process according to claim 1 wherein said monomer comprises an ester of acryloxypropionic acid.
Claim 13
Dependent Claim
14 words
A process according to claim 1 wherein said monomer comprises neopentyl glycol di(beta-acryloxypropionic acid).
Claim 14
Dependent Claim
14 words
A process according to claim 1 wherein said monomer comprises diethylene glycol di(beta-acryloxypropionic acid).
Claim 15
Dependent Claim
13 words
A process according to claim 1 wherein said radiation is ultra violet radiation.
Claim 16
Dependent Claim
14 words
A process according to claim 1 wherein said substrate is an information storage device.
Claim 17
Dependent Claim
37 words
A process according to claim 1 wherein a positive pressure is applied, during curing of said liquid monomer, to the surface of the substrate opposite the surface being coated and said mold is stationary during said process.
Claim 18
Dependent Claim
44 words
A process according to claim 1 wherein said substrate is held in place by applying a vacuum to the side of the substrate opposite the side of the substrate being coated and, prior to or when said radiation curing is initiated, releasing said vacuum.
Claim 19
Dependent Claim
19 words
A process according to claim 1 wherein said hold on said substrate is released prior to said radiation curing.
Claim 20
Dependent Claim
29 words
A process according to claim 1 wherein said hold on said substrate is released subsequent to said radiation curing and prior to significant shrinkage of the curing liquid monomer.
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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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |