US4496210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature-flexible radiation-curable unsaturated polysiloxane coated fiber optic
Assignee: Covestro Resins BV
•
Filing: 1982-07-19
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Granted: 1985-01-29
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Expires: 2002-07-19
Abstract
Abstract Optical fibers are coated with a radiation-curable liquid, polyethylenically unsaturated coating composition consisting essentially of an organic polysiloxane having from 2 to 6 reactive side chains each of which carry a functional group providing one reactive site which has been reached to provide a single radiation-curable monoethylenically unsaturated side chain. There are about one such side chain for every 500 to 5,000 units of molecular weight. This provides a prime coating which has a modulus of elasticity at room temperature and at -60° C. below 3000.
Inventors
- 👤 Robert E. Ansel
- 👤 Orvid R. Cutler
- 👤 Elias P. Moschovis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:08
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/08; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/388; C08G77/392; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
91 words
An optical glass fiber prime coated with an ultraviolet-cured coating composition having a modulus of elasticity at room temperature and at -60° C. below 3000 psi. said coating composition being a liquid, polyethylenically unsaturated, radiation-curable coating composition consisting essentially of an organic polysiloxane having from 2 to 6 reactive side chains each of which carry a functional group providing one reactive site which has been reacted to provide a single radiation-curable monoethylenically unsaturated side chain, there being about one such side chain for every 500 to 5,000 units of molecular weight.
Claim 2
Dependent Claim
91 words
An optical glass fiber prime coated with an ultraviolet-cured coating composition having a modulus of elasticity at room temperature and at -60° C. below 3000 psi. said coating composition being a liquid, polyethylenically unsaturated, radiation-curable coating composition consisting essentially of an organic polysiloxane having from 2 to 6 reactive side chains each of which carry a functional group providing one reactive site which has been reacted to provide a single radiation-curable monoethylenically unsaturated side chain, there being about one such side chain for every 500 to 5,000 units of molecular weight.
Claim 3
Dependent Claim
23 words
A coated optical glass fiber as recited in claim 1 in which said organic polysiloxane is hydrocarbon substituted except for said functional groups.
Claim 4
Dependent Claim
22 words
A coated optical glass fiber as recited in claim 1 in which said monoethylenically unsaturated side chain provides acrylate or methacrylate functionality.
Claim 5
Dependent Claim
32 words
A coated optical glass fiber as recited in claim 1 in which said polysiloxane carries a reactive group selected from the group consisting of hydroxyl, amine, mercaptan, carboxyl and glycidyl functional groups.
Claim 6
Dependent Claim
17 words
A coated optical glass fiber as recited in claim 1 in which said reactive group is hydroxyl.
Claim 7
Dependent Claim
27 words
A coated optical glass fiber as recited in claim 5 in which said hydroxyl group is reacted with an acrylate or methacrylate carrying a single isocyanate group.
Claim 8
Dependent Claim
37 words
A coated optical glass fiber as recited in claim 6 in which said hydroxyl group is reacted with the reaction product of one mol of 2,4-toluene diisocyanate or isophorone diisocyanate with one mol of 2-hydroxy ethyl acrylate.
Claim 9
Dependent Claim
24 words
A coated optical glass fiber as recited in claim 1 in which said reactive group is selected to include a single reactive hydrogen atom.
Claim 10
Dependent Claim
28 words
A coated optical glass fiber as recited in claim 8 in which said reactive hydrogen atom is reacted with an acrylate or methacrylate carrying a single isocyanate group.
Claim 11
Dependent Claim
40 words
A coated optical glass fiber as recited in claim 4 in which said functional group carrying one reactive site is a saturated aliphatic radical containing, except for the reactive functional group, only carbon and hydrogen, or carbon, hydrogen and oxygen.
Claim 12
Dependent Claim
27 words
A coated optical glass fiber as recited in claim 2 in which the hydrocarbon substituent is selected from the group consisting of methyl, phenyl, and mixtures thereof.
Claim 13
Dependent Claim
26 words
A coated optical glass fiber as recited in claim 11 in which said functional group is connected to said polysiloxane by a carbon to silicon bond.
Claim 14
Dependent Claim
24 words
A coated optical glass fiber as recited in claim 1 further containing initiators and/or photosensitizers appropriate for rendering the composition curable by ultraviolet radiation.
Claim 15
Dependent Claim
55 words
An optical glass fiber as recited in claim 1 in which said prime coating consists essentially of organic polysiloxane having three carbinol groups and an average molecular weight of about 6000, said carbinol groups being reacted with organic diisocyanate and an hydroxyalkyl acrylate to provide a triacrylate polyurethane polysiloxane which is cured by ultraviolet radiation.
Claim 16
Dependent Claim
34 words
A prime coated optical glass fiber as recited in claim 14 in which said diisocyanate is selected from the group consisting of 2,4-toluene diisocyanate and isophorone diisocyanate and said hydroxyalkyl acrylate is 2-hydroxyethyl acrylate.
Claim 17
Dependent Claim
37 words
A prime coated optical glass fiber as recited in claim 14 in which said diisocyanate and said hydroxy acrylate are prereacted to form an acrylate monoisocyanate which is then reacted with the carbinol groups of said polysiloxane.
Claim 18
Dependent Claim
24 words
A prime coated optical glass fiber as recited in claim 14 overcoated with a topcoat to protect the prime coat from abrasion and hydrolysis.
Claim 19
Dependent Claim
27 words
A prime coated optical glass fiber as recited in claim 17 in which said polysiloxane is substituted only by methyl groups in addition to said carbinol groups.
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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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |