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US4472021A
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Strippable radiation-cured coatings for optical fiber and method
Assignee: Stamicarbon BV
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Filing: 1982-12-10
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Granted: 1984-09-18
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Expires: 2002-12-10
Abstract
Abstract Radiation-curable coating compositions particularly adapted to reduce the adhesion of the radiation-cured coatings to glass optical fibers (and thereby enhance strippability) are disclosed. These comprise a radiation-curable polyethylenic organic compound and from about 2% to about 20% of the coating composition of an organic polysiloxane carrying a plurality of hydroxy-terminated groups which are joined to some of the silicon atoms in the polysiloxane chain by a carbon-to-silicon bond. The polysiloxane reduces the adhesion of the radiation-cured coating to the glass surface of the fiber. Ultraviolet cures using acrylates as the ethylenic group are preferred.
Inventors
- 👤 Robert E. Ansel
- 👤 Orvid R. Cutler, Jr.
- 👤 George I. Pasternack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:21
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; G; G02; G02B; G02B6/00; G02B6/02; G02B6/02395; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
An optical glass fiber coated with a radiation-cured coating of radiation-curable polyethylenic organic compound providing a cured coating having a modulus less than about 150,000 psi. and from about 2% to about 20% of the coating of an organic polysiloxane carrying a plurality of hydroxy-terminated groups which are joined to some of the silicon atoms in the polysiloxane chain by a carbon-to-silicon bond, said polysiloxane reducing the adhesion of the radiation-cured coating to the glass surface of said optical fiber.
Claim 2
Dependent Claim
80 words
An optical glass fiber coated with a radiation-cured coating of radiation-curable polyethylenic organic compound providing a cured coating having a modulus less than about 150,000 psi. and from about 2% to about 20% of the coating of an organic polysiloxane carrying a plurality of hydroxy-terminated groups which are joined to some of the silicon atoms in the polysiloxane chain by a carbon-to-silicon bond, said polysiloxane reducing the adhesion of the radiation-cured coating to the glass surface of said optical fiber.
Claim 3
Dependent Claim
26 words
An optical fiber as recited in claim 1 in which said polysiloxane is present in an amount of from 3% to 15% of the coating composition.
Claim 4
Dependent Claim
19 words
An optical fiber as recited in claim 1 in which said polysiloxane carried from 2 to 6 carbinol groups.
Claim 5
Dependent Claim
24 words
An optical fiber as recited in claim 3 in which each of said carbinol groups is a polyether including up to 15 ether groups.
Claim 6
Dependent Claim
19 words
An optical fiber as recited in claim 3 in which said polysiloxane is methyl-substituted except for said carbinol groups.
Claim 7
Dependent Claim
81 words
An optical fiber as recited in claim 1 in which said polysiloxane possesses either of the following structures: ##STR2## where R is a hydrocarbon radical having from 1 to 12 carbon atoms; R 1 is an alkylene group having from 1 to 16 carbon atoms, or a polyether having alkylene groups having 2 to 4 carbon atoms and up to 15 ether groups; x has a value of 1 to 1000; and a has a value of from 2 to 6.
Claim 8
Dependent Claim
13 words
An optical fiber as recited in claim 6 in which R is methyl.
Claim 9
Dependent Claim
18 words
An optical fiber as recited in claim 8 in which said modulus is less than about 15,000 psi.
Claim 10
Independent Claim
123 words
A method of producing a coated optical fiber in which the coating exhibits reduced adhesion to the glass surface of the fiber comprising, coating the glass surface of said optical fiber with a coating of liquid radiation-curable coating composition comprising radiation-curable polyethylenic organic compound providing a cured coating having a modulus less than about 150,000 psi. and from about 2% to about 20% of the coating composition of an organic polysiloxane carrying a plurality of hydroxy-terminated groups which are joined to some of the silicon atoms in the polysiloxane chain by a carbon-to-silicon bond, said polysiloxane reducing the adhesion of the radiation-cured coating to the glass surface of said optical fiber, and then exposing the wet-coated fiber to radiation to cure the same.
Claim 11
Independent Claim
123 words
A method of producing a coated optical fiber in which the coating exhibits reduced adhesion to the glass surface of the fiber comprising, coating the glass surface of said optical fiber with a coating of liquid radiation-curable coating composition comprising radiation-curable polyethylenic organic compound providing a cured coating having a modulus less than about 150,000 psi. and from about 2% to about 20% of the coating composition of an organic polysiloxane carrying a plurality of hydroxy-terminated groups which are joined to some of the silicon atoms in the polysiloxane chain by a carbon-to-silicon bond, said polysiloxane reducing the adhesion of the radiation-cured coating to the glass surface of said optical fiber, and then exposing the wet-coated fiber to radiation to cure the same.
References Cited (Backward Citations)
US4367918A
Cited
US4333998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |