CA1198083A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Single coated optical fiber
Assignee: DeSoto Inc
•
Filing: 1983-10-25
•
Granted: 1985-12-17
•
Expires: 2003-10-25
Abstract
Abstract SINGLE-COATED OPTICAL FIBER 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 mole-cular weight of from 400 to 5000; and (2) from 5% to 25% 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, phenyl, and mixtures thereof. Ethoxyethoxyethyl acrylate is particularly pre-ferred. 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
CA
Data Source
google_patents
Last Synchronized
2026-11-04 20:28
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: 10
Claim 1
Independent Claim
139 words
A method of producing coated 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 coating composition of a diacrylate-terminated polyurethane, said polyurethane being based on a having an average molecular weight of from 800 to 2500 and which is the reaction product of an organic diisocyanate with an aliphatic diol, said polyurethane-containing from 2-4 urethane groups, (2) from 5% to 25% of the coating composition of an ether of a C2-C4 alkylene glycol monoester of acrylic acid, the ether being selected from the group consisting of ethoxyethyl, dicyclopentenyl and phenyl ethers, and mixtures of said ethers, and (3) from 1% to 15% of the coating composition of a triacrylate ester, and then exposing the wet-coated fiber to radiation to cure the coating.
Claim 2
Independent Claim
139 words
A method of producing coated 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 coating composition of a diacrylate-terminated polyurethane, said polyurethane being based on a having an average molecular weight of from 800 to 2500 and which is the reaction product of an organic diisocyanate with an aliphatic diol, said polyurethane-containing from 2-4 urethane groups, (2) from 5% to 25% of the coating composition of an ether of a C2-C4 alkylene glycol monoester of acrylic acid, the ether being selected from the group consisting of ethoxyethyl, dicyclopentenyl and phenyl ethers, and mixtures of said ethers, and (3) from 1% to 15% of the coating composition of a triacrylate ester, and then exposing the wet-coated fiber to radiation to cure the coating.
Claim 3
Dependent Claim
35 words
A method as recited in claim 1 in which said composition further includes a photoinitiator rendering the composition sensitive to ultraviolet light and the wet-coated fiber is exposed to ultraviolet light to cure the coating.
Claim 4
Dependent Claim
30 words
A method as recited in claim 1 in which said diacrylate-terminated polyurethane is obtained from an hydroxyalkyl acrylate in which the alkyl group contains from 2 to 6 carbon atoms.
Claim 5
Dependent Claim
14 words
A method as recited in claim 3 in which said acrylate is hydroxyethyl acrylate.
Claim 6
Dependent Claim
16 words
A method as recited in claim 1 in which said alkylene glycol is the ethylene glycol.
Claim 7
Dependent Claim
19 words
A method as recited in claim 1 in which said alkylene glycol monoester of acrylic acid is ethoxyethoxyethyl acrylate.
Claim 8
Dependent Claim
15 words
A method as recited in claim 1 in which said triacrylate is trimathylol propane triacrylate.
Claim 9
Dependent Claim
26 words
A method as recited in claim 1 in which said alkylene glycol monoester of acrylic acid is present in an amount of from 5% to 15%.
Claim 10
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.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.