Patent US4849462A successfully refreshed from Google Patents.
US4849462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet-curable coatings for optical glass fibers having improved adhesion
Assignee: Covestro Resins BV
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Filing: 1988-01-04
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Granted: 1989-07-18
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Expires: 2008-01-04
Abstract
Abstract Optical glass fiber having its glass surface adherently coated with an ultraviolet-cured coating of a liquid ultraviolet-curable coating composition is disclosed in which the composition comprises an ultraviolet-curable polymeric polyacrylate, a photoinitiator to render the composition curable with ultraviolet light, and from about 0.5% to about 5% of the coating composition of a polyalkoxy silane containing an organic substituent carrying a single mercaptyl hydrogen atom capable of reacting with acrylate unsaturation by Michael adduction. These compositions provide improved adhesion to the glass surface of the optical fiber which is well retained after exposure to high humidity atmospheres.
Inventors
- 👤 Timothy E. Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:03
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; C08G18/67; C08G18/671; C08G18/672; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175; C08G18/83; C08G18/837
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
An optical glass fiber having its glass surface adherently coated with an ultraviolet-cured coating of a liquid ultraviolet-curable coating composition adapted to deposit, after said ultraviolet cure, an adherent cured coating on a glass surface, said composition comprising an ultraviolet-curable polyurethane polyacrylate, a photoinitiator to render said composition curable with ultraviolet light, and from about 0.5% to about 5% of the coating composition of a polyalkoxy silane containing an organic substituent carrying a single mercaptyl hydrogen atom capable of reacting with acrylate unsaturation by Michael adduction.
Claim 2
Dependent Claim
86 words
An optical glass fiber having its glass surface adherently coated with an ultraviolet-cured coating of a liquid ultraviolet-curable coating composition adapted to deposit, after said ultraviolet cure, an adherent cured coating on a glass surface, said composition comprising an ultraviolet-curable polyurethane polyacrylate, a photoinitiator to render said composition curable with ultraviolet light, and from about 0.5% to about 5% of the coating composition of a polyalkoxy silane containing an organic substituent carrying a single mercaptyl hydrogen atom capable of reacting with acrylate unsaturation by Michael adduction.
Claim 3
Dependent Claim
19 words
A coated optical glass fiber as recited in claim 1 in which said polyalkoxy silane is gamma-mercaptopropyl trimethoxy silane.
Claim 4
Dependent Claim
18 words
A coated optical glass fiber as recited in claim 2 in which said polyacrylate is a polyurethane urea.
Claim 5
Dependent Claim
28 words
A coated optical glass fiber as recited in claim 1 in which said composition cures to provide a film having a tensile modulus less than about 150,000 psi.
Claim 6
Dependent Claim
28 words
A coated optical glass fiber as recited in claim 1 in which said composition cures to provide a film having a tensile modulus less than about 10,000 psi.
Claim 7
Dependent Claim
28 words
A coated optical glass fiber as recited in claim 2 in which said composition cures to provide a film having a tensile modulus less than about 10,000 psi.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |