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US5111526A
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Plastic optical fibers and process for the production thereof
Assignee: Mitsubishi Chemical Corp
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Filing: 1991-01-18
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Granted: 1992-05-05
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Expires: 2011-01-18
Abstract
Abstract A plastic optical fiber comprising a core polymer having a refractive index of n 1 , which comprises a polymer of α, β-unsaturated carboxylic acid fluoroalkylester represented by the general formula [I] as the main monomer, and a clad copolymer having a refractive index of n 2 , which comprises perfluoro(2,2-dimethyl-1,3-dioxole) as the main monomer, and which satisfies the relationship of (n 1 -n 2 ≧0.01): ##STR1## wherein X represents CH 3 , H, D, F, Cl, or CF 3 , Y represents H or D, and Rf represents a fluoroalkyl group having a linear or branched chain. The optical fiber is prepared by a melt-extrusion method. The optical fiber has excellent light transmitting properties, and it is suitable as an optical fiber for long distance light communication.
Inventors
- 👤 Takashi Yamamoto
- 👤 Tsuruyoshi Matsumoto
- 👤 Katsuhiko Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:20
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; G02B1/00; G02B1/04; G02B1/045; G02B1/046; G02B1/048; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A plastic optical fiber comprising (a) a core polymer having a refractive index of N 1 and obtained by polymerizing a monomer represented by the general formula as the main monomer, and (b) a clad polymer comprising a polymer having a refractive index of n 2 and obtained by polymerizing perfluoro (2,2-dimethyl-1,3-dioxole) as the main monomer, and which satisfies the relation (n 1 -n 2 ≧0.01): ##STR6## wherein X represents CH 3 , H, D, F, Cl, or CF 3 , Y represents H or D, and Rf represents a fluoroalkyl group having a linear or branched chain.
Claim 2
Dependent Claim
98 words
A plastic optical fiber comprising (a) a core polymer having a refractive index of N 1 and obtained by polymerizing a monomer represented by the general formula as the main monomer, and (b) a clad polymer comprising a polymer having a refractive index of n 2 and obtained by polymerizing perfluoro (2,2-dimethyl-1,3-dioxole) as the main monomer, and which satisfies the relation (n 1 -n 2 ≧0.01): ##STR6## wherein X represents CH 3 , H, D, F, Cl, or CF 3 , Y represents H or D, and Rf represents a fluoroalkyl group having a linear or branched chain.
Claim 3
Dependent Claim
38 words
The plastic optical fiber as claimed in claim 1, wherein said clad polymer is formed of a mixture comprising 50 to 99% by weight of a copolymer of perfluoro(2,2-dimethyl-1,3-dioxole) and 1 to 50% by weight of a perfluoroalkylether.
Claim 4
Dependent Claim
35 words
The plastic optical fiber as claimed in claim 1, wherein said core polymer is a bulk polymer obtained by conducting a polymerization in a completely sealed system having a cleanliness of not less than 100.
Claim 5
Dependent Claim
54 words
The plastic optical fiber as claimed in claim 1, wherein said core polymer is a polymer having a refractive index n 1 of 1.33 to 1.46; and said clad polymer is a polymer having a refractive index n 2 of 1.29 to 1.35; and which satisfies the relationship of (n 1 -n 2 ≧0.03).
Claim 6
Dependent Claim
20 words
The plastic optical fiber as claimed in claim 1, wherein said monomer represented by the general formula is an α-fluoro-fluoroalkylacrylate.
Claim 7
Dependent Claim
113 words
A process for the production of a plastic optical fiber comprising (a) using, as a core polymer, a polymer having a refractive index n 1 and composed of the main monomer represented by the general formula, (b) using, as a clad polymer, a polymer having a refractive index n 2 and composed of the main monomer of perfluoro(2,2-dimethyl-1,3-dioxole), (c) selecting the difference (n 1 -n 2 ) to be 0.01 or more, and (d) forming the fiber by a melt-extrusion method: ##STR7## wherein X represents CH 3 , H, D, F, Cl, or CF 3 , Y represents H or D, and Rf represents a fluoroalkyl group having a linear or branched chain.
Claim 8
Dependent Claim
113 words
A process for the production of a plastic optical fiber comprising (a) using, as a core polymer, a polymer having a refractive index n 1 and composed of the main monomer represented by the general formula, (b) using, as a clad polymer, a polymer having a refractive index n 2 and composed of the main monomer of perfluoro(2,2-dimethyl-1,3-dioxole), (c) selecting the difference (n 1 -n 2 ) to be 0.01 or more, and (d) forming the fiber by a melt-extrusion method: ##STR7## wherein X represents CH 3 , H, D, F, Cl, or CF 3 , Y represents H or D, and Rf represents a fluoroalkyl group having a linear or branched chain.
Claim 9
Dependent Claim
35 words
The process as claimed in claim 6, wherein said clad polymer is a mixture comprising 50 to 99% by weight of a polymer comprising perfluoro(2,2-dimethyl -1,3-dioxole) and 1 to 50% by weight of a perfluoroalkylether.
Claim 10
Dependent Claim
17 words
The process as claimed in claim 6, wherein a ram-extrusion method is employed as said melt-extrusion method.
Claim 11
Dependent Claim
18 words
The process as claimed in claim 6, wherein said monomer represented by the general formula is an α-fluoro-fluoroalkylacrylate.
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