Patent US2074284A successfully refreshed from Google Patents.
EP0111280A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Single-coated optical fiber
Assignee: DSM BV
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Filing: 1983-12-03
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Granted: —
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Expires: 2003-12-03
Abstract
Abstract Radiation-curable coating compositions particularly adapted for the single coat coating of optical fibers are disclosed. These comprise (1) from 65% to 85% of a diethylenic-terminated polyurethane, which may contain urea groups, the polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; and (2) from 5% to 25% of an ether of a C 2 -C 4 alkyl ester of a monoethylenically unsaturated monocarboxylic acid, the ether being selected from the group consisting of ethoxyethyl, dicyclopentenyl, phenyl, and mixtures thereof. Ethoxyethoxyethyl acrylate is particularly preferred. A triacrylate ester, such as trimethylol propane triacrylate, is also desirably present.
Inventors
- 👤 Robert E. Ansel
- 👤 Orvid R. Cutler, Jr.
- 👤 Timothy E. Bishop
- 👤 George Pasternack
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C08F; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
115 words
A method of producing optical glass fiber comprising, applying to freshly formed optical glass fiber a coating of radiation-curable liquid coating composition comprising: (1) from 65% to 85% of the of the coating composition of a diethylenic-terminated polyurethane, which may contain urea groups, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; and (2) from 5% to 25% of the coating composition of an ether of a C2-C4 alkyl ester of a monoethylenically unsaturated monocarboxylic acid, the ether being selected from the group consisting of ethoxyethyl, dicyclopentenyl and phenyl ethers, and mixtures of said ethers, and then exposing the wet-coated fiber to radiation to cure the coating.
Claim 2
Independent Claim
115 words
A method of producing optical glass fiber comprising, applying to freshly formed optical glass fiber a coating of radiation-curable liquid coating composition comprising: (1) from 65% to 85% of the of the coating composition of a diethylenic-terminated polyurethane, which may contain urea groups, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; and (2) from 5% to 25% of the coating composition of an ether of a C2-C4 alkyl ester of a monoethylenically unsaturated monocarboxylic acid, the ether being selected from the group consisting of ethoxyethyl, dicyclopentenyl and phenyl ethers, and mixtures of said ethers, and then exposing the wet-coated fiber to radiation to cure the coating.
Claim 3
Dependent Claim
38 words
A method as recited in claim 1 in which said diisocyanate is the reaction product of an organic diisocyanate with an aliphatic molecule having two isocyanate-reactive hydrogen atoms, said product including 2 to 10 urethane and/or urea groups.
Claim 4
Dependent Claim
20 words
A method as recited in claim 2 in which said aliphatic groups are selected from polyether, polyester and polyether-ester groups.
Claim 5
Dependent Claim
30 words
A method as recited in claim 3 in which said diethylenic-terminated polyurethane is obtained from an hydroxyalkyl acrylate in which the alkyl group contains from 2 to 6 carbon atoms.
Claim 6
Dependent Claim
14 words
A method as recited in claim 4 in which said acrylate is hydroxyethyl acrylate.
Claim 7
Dependent Claim
14 words
A method as recited in claim 3 in which said polyurethane includes urea groups.
Claim 8
Dependent Claim
16 words
A method as recited in claim 1 in which said alkyl ester is the ethyl ester.
Claim 9
Dependent Claim
17 words
) 8. A method as recited in claim 7 in which. said monocarboxylic acid is acrylic acid.
Claim 10
Dependent Claim
15 words
A method as recited in claim 1 in which said alkyl ester is ethoxyethoxyethyl acrylate.
Claim 11
Dependent Claim
27 words
A method as recited in claim 1 in which a triacrylate ester is also present in an amount of from 1% to 15% of the coating composition.
Claim 12
Dependent Claim
15 words
A method as recited in claim 10 in which said triacrylate is trimethylol propane triacrylate.
Claim 13
Dependent Claim
35 words
A method as recited in claim 10 in which said alkyl ester is present in an amount of from 5% to 15% and said diisocyanate has an average molecular weight of from 800 to 2500.
Claim 14
Dependent Claim
35 words
A method as recited in claim 12 in which said diisocyanate contains from 2 to 4 urethane and/or urea groups, and the ethylenic groups in said polyurethane and in said liquid monomer are acrylate groups.
Claim 15
Dependent Claim
22 words
A method as recited in claim 13 in which said composition further includes a photoinitiator rendering the composition sensitive to ultraviolet light.
Claim 16
Dependent Claim
16 words
An optical glass fiber coated with a radiation-cured coating prepared by the method of claim 1.
References Cited (Backward Citations)
No citation records indexed.
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