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US5022737A
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Plastic cladding composition for plastic core optical fiber, and plastic core optical fiber prepared therefrom
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-11-22
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Granted: 1991-06-11
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Expires: 2009-11-22
Abstract
Abstract Disclosed is a cladding composition for a plastic clad plastic core optical fiber, which comprises (a) an ultraviolet ray-curable monofunctional acrylic or α-fluoroacrylic monomer, (b) a polyfunctional acrylate or α-fluoroacrylate having at least two acryloyl or α-fluoroacryloy radicals in the molecule and (c) a photoinitiator. The difference (n 1 -n 2 ) between the refractive index n 1 of the plastic core and the refractive index n 2 of a cured product of the cladding composition is at least 0.01. The plastic clad plastic core optical fiber inhibits an enhanced heat resistance.
Inventors
- 👤 Takashi Yamamoto
- 👤 Tsuruyoshi Matsumoto
- 👤 Katsuhiko Shimada
- 👤 Yoshihiro Uozu
- 👤 Ryuji Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:24
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; D; D01; D01F; D01F8/00; D01F8/04; D01F8/10; B; B29; B29D; B29D11/00; B29D11/00663; C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/105; G02B1/00; G02B1/04; G02B1/045; G02B1/048; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
A plastic clad plastic core optical fiber comprising a plastic core with a reflective index n 1 and an ultraviolet ray-cured cladding composition with a refractive index n 2 , wherein said ultraviolet ray-cured cladding composition is a cured product of a cladding composition comprising: (a) an ultraviolet ray-curable monofunctional acrylic monomer mixture comprising a highly fluorinated monofunctional acrylate or α-fluoroacrylate represented by the following formula (I): ##STR8## wherein X and Y represent H or F, l is an integer of from 1 to 12 and m is an integer of from 5 to 12, and a lowly fluorinated monofunctional acrylate or α-fluoroacrylate represented by the following formula (II): ##STR9## wherein X and Y represent H or F and n is an integer of from 1 to 3, (b) a polyfunctional acrylate or α-fluoroacrylate having at least two acryloyl or α-fluoroacryloyl radicals in the molecule, and (c) a photoinitiator, and the difference (n 1 -n 2 ) between the refractive index n 1 of the plastic core and the refractive index n 2 of the cured cladding composition is at least 0.01.
Claim 2
Dependent Claim
182 words
A plastic clad plastic core optical fiber comprising a plastic core with a reflective index n 1 and an ultraviolet ray-cured cladding composition with a refractive index n 2 , wherein said ultraviolet ray-cured cladding composition is a cured product of a cladding composition comprising: (a) an ultraviolet ray-curable monofunctional acrylic monomer mixture comprising a highly fluorinated monofunctional acrylate or α-fluoroacrylate represented by the following formula (I): ##STR8## wherein X and Y represent H or F, l is an integer of from 1 to 12 and m is an integer of from 5 to 12, and a lowly fluorinated monofunctional acrylate or α-fluoroacrylate represented by the following formula (II): ##STR9## wherein X and Y represent H or F and n is an integer of from 1 to 3, (b) a polyfunctional acrylate or α-fluoroacrylate having at least two acryloyl or α-fluoroacryloyl radicals in the molecule, and (c) a photoinitiator, and the difference (n 1 -n 2 ) between the refractive index n 1 of the plastic core and the refractive index n 2 of the cured cladding composition is at least 0.01.
Claim 3
Dependent Claim
28 words
A plastic clad plastic core optical fiber as set forth in claim 1, wherein the ultraviolet raycurable monofuncitonal acrylic monomer mixture has a refractive index smaller than 1.38.
Claim 4
Dependent Claim
31 words
A plastic clad plastic core optical fiber as set forth in claim 1, wherein the cladding composition comprises at least 50% by weight of the ultraviolet ray-curable monofunctional acrylic monomer mixture.
Claim 5
Dependent Claim
73 words
A plastic clad plastic core optical fiber as set forth in claim 1, wherein the cladding composition comprises 50 to 98% by weight of the ultraviolet ray-curable monofunctional acrylic monomer mixture, 1 to 20% by weight of the polyfunctional acrylate or α-fluoroacrylate, 0.01 to 10% by weight of a photoinitiator and 0.05 to 10% by weight of at least one stabilizer selected from the group consisting of thiodicarboxylic acid esters and hindered phenols.
Claim 6
Dependent Claim
32 words
A plastic clad plastic core optical fiber as set forth in claim 1, wherein the plastic core is composed of a polymer having a glass transition temperature of at least 100° C.
Claim 7
Dependent Claim
32 words
A plastic clad plastic core optical fiber as set forth in claim 5, wherein the plastic core is composed of a polymer having a glass transition temperature of at least 120° C.
Claim 8
Dependent Claim
72 words
A plastic clad plastic core optical fiber as set forth in claim 6, wherein the plastic core is composed of a polymer selected from the group consisting of polycarbonates, polymers having recurring base units represented by the following formula (III): ##STR10## wherein R represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms or a phenyl group, and 4-methylpentene-1 polymers.
Claim 9
Dependent Claim
46 words
A plastic clad plastic core optical fiber as set forth in claim 1, wherein, in the monofunctional acrylic monomer mixture, m in the formula (I) is an integer of from 7 to 10 and n in the formula (II) is an integer of 1 or 2.
Claim 10
Dependent Claim
57 words
A plastic clad plastic core optical fiber as set forth in claim 1, wherein the ultraviolet ray-curable monofunctional acrylic monomer mixture comprises 1 to 60% by weight of the highly fluorinated monofunctional acrylate or α-fluoracrylate of the formula (I) and 99 to 40% by weight of the lowly fluorinated monofunctional acrylate or α-fluoroacrylate of the formula (II).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |