EP0154339A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical fiber
Assignee: Daikin Industries Ltd
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Filing: 1985-03-06
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Granted: —
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Expires: 2005-03-06
Abstract
Abstract An optical fiber comprising a core and a cladding, wherein the core is made of a polymer comprising units of methyl methacrylate, and the cladding is made of a copolymer comprising units of vinylidene fluoride and 0.5 to 10 % by mole of units of hexafluoropropene, which has good heat resistance and flexibility and is excellent in adhesivity between the core and the cladding.
Inventors
- 👤 Yoshiharu Tatsukami
- 👤 Toshiki Doi
- 👤 Masahiko Oka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 09:51
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/045; G02B1/046; B; B29; B29D; B29D11/00; B29D11/00663; G02B1/048; B29C; B29C48/00; B29C48/03; B29C48/05; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2964; Y10T428/2967
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
An optical fiber comprising a core and a cladding, wherein the core is made of a polymer comprising units of methyl methacrylate, and the cladding is made of a copolymer comprising units of vinylidene fluoride and 0.5 to 10 % by mole of units of hexafluoropropene.
Claim 2
Dependent Claim
46 words
An optical fiber comprising a core and a cladding, wherein the core is made of a polymer comprising units of methyl methacrylate, and the cladding is made of a copolymer comprising units of vinylidene fluoride and 0.5 to 10 % by mole of units of hexafluoropropene.
Claim 3
Dependent Claim
87 words
An optical fiber according to claim 1, wherein the polymer comprising units of methyl methacrylate of the core is selected from the group consisting of a homopolymer of methyl methacrylate and a copolymer comprising at least 60 % by mole of units of methyl methacrylate and units of at least one comonomer selected from the group consisting of ethyl methacrylate, propyl methacrylate, butyl methacrylate, isobutyl methacrylate, cyclohexyl methacrylate and methacrylic esters the ester moiety of which has an alicyclic hydrocarbon group having more than 8 carbon atoms.
Claim 4
Dependent Claim
21 words
An optical fiber according to claim 2, wherein the polymer comprising units of methyl methacrylate is the homopolymer of methyl methacrylate.
Claim 5
Dependent Claim
52 words
An optical fiber according to claim 2, wherein the polymer comprising units of methyl methacrylate is the copolymer comprising at least 60 % by mole of units of methyl methacrylate and units of the methacrylic ester the ester moiety of which has the alicyclic hydrocarbon group having more than 8 carbon atoms.
Claim 6
Dependent Claim
29 words
An optical fiber according to claim 4, wherein the methacrylic ester is one the ester moiety of which has an alicyclic hydrocarbon group having 10 to 18 carbon atoms.
Claim 7
Dependent Claim
38 words
An optical fiber according to claim 4, wherein the methacrylic ester is one selected from the group consisting of 1-adamantyl methacrylate, 2-adamantyl methacrylate, 3,5-dimethyl-I-adamantyl methacrylate, bornyl methacrylate, p-menthan methacrylate, 2-methylcamphan methacrylate, fenchyl methacrylate, A-menthyl methacrylate and 2,2,5-trimethylcyclohexy methacrylate.
Claim 8
Dependent Claim
30 words
An optical fiber according to claims 1 to 6, wherein the polymer comprising units of methyl methacrylate of the core further comprises up to 10 % of an alkyl acrylate.
Claim 9
Dependent Claim
26 words
An optical fiber according to claim 1, wherein the cladding is made of a copolymer comprising vinylidene fluoride and 1 to 9 % by mole hexafluoropropene.
Claim 10
Dependent Claim
26 words
An optical fiber according to claim 1, wherein the copolymer of vinylidene fluoride and hexafluoropropene has a number average molecular weight of about 10,000 to 500,000.
Claim 11
Dependent Claim
23 words
An optical fiber according to claim 1, wherein the copolymer of vinylidene fluoride and hexafluoropropene has a refractive index of 1.35 to 1.42.
Claim 12
Dependent Claim
38 words
An optical fiber according to claim 3, wherein the copolymer of the cladding further comprises at least a comonomer selected from the group consisting of tetrafluoroethylene, trifluoroethylene, trifluorochloroethylene, trifluoropropene, pentafluoropropene, perfluoro(methyl vinyl ether), perfluoro(propyl vinyl ether) and hexafluoroisobutylene.
References Cited (Backward Citations)
No citation records indexed.
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