US5363468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber optic rod and production thereof
Assignee: Kobe Steel Ltd
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Filing: 1993-10-28
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Granted: 1994-11-08
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Expires: 2013-10-28
Abstract
Abstract Disclosed herein is a fiber optic rod having good mechanical properties (such as tensile strength and tensile modulus) and good water resistance and a process for producing the same. The fiber optic rod is formed by impregnating, followed by curing, a fibrous reinforcement with a resin composition composed of epoxy (meth)acrylate oligomer and xylene-formaldehyde resin, or epoxy (meth)acrylate oligomer and acid anhydride-modified epoxy (meth)acrylate (which is obtained by modifying epoxy (meth)acrylate oligomer with an organic acid intramolecular anhydride) as curable components and a reactive diluent of monofunctional and/or multifunctional (meth)acrylate and ultraviolet-sensitive polymerization initiator as essential components.
Inventors
- 👤 Eiichiro Yoshikawa
- 👤 Koji Yamamoto
- 👤 Hiroshi Kawashima
- 👤 Mika Anzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:15
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; C; C03; C03C; C03C25/00; C03C25/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
78 words
A fiber optic rod which comprises an ultraviolet transmitting fibrous reinforcement impregnated, followed by curing, with a resin composition composed of, as essential components, (a) 40-70 parts by weight of epoxy (meth)acrylate oligomer, (b) 60-30 parts by weight of reactive diluent of mono-functional and/or multifunctional (meth)acrylate, (c) 5-20 parts by weight of xylene-formaldehyde resin, and (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a), (b), and (c)) of ultraviolet-sensitive polymerization initiator.
Claim 2
Dependent Claim
78 words
A fiber optic rod which comprises an ultraviolet transmitting fibrous reinforcement impregnated, followed by curing, with a resin composition composed of, as essential components, (a) 40-70 parts by weight of epoxy (meth)acrylate oligomer, (b) 60-30 parts by weight of reactive diluent of mono-functional and/or multifunctional (meth)acrylate, (c) 5-20 parts by weight of xylene-formaldehyde resin, and (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a), (b), and (c)) of ultraviolet-sensitive polymerization initiator.
Claim 3
Dependent Claim
44 words
A fiber optic rod as defined in claim 1, wherein the epoxy (meth)acrylate oligomer is one which is formed by adding (meth)acrylic acid to an epoxy compound and has two or more (meth)acryloyl groups in the molecule and a number-average molecular weight of 500-5000.
Claim 4
Dependent Claim
46 words
A fiber optic rod as defined in claim 2, wherein the epoxy compound is at least one species selected from the group consisting of bisphenol-A type epoxy compound, hydrogenated bisphenol-A epoxy compound, modified bisphenol-A type epoxy compound, epoxy compound of (poly)alkylene glycol, and novolak-type epoxy compound.
Claim 5
Dependent Claim
36 words
A fiber optic rod as defined in any of claims 1 to 3, wherein the xylene-formaldehyde resin is one which is formed by addition-condensation of m-xylene and formaldehyde and has a number-average molecular weight of 250-700.
Claim 6
Dependent Claim
89 words
A process for producing a fiber optic rod which comprises impregnating an ultraviolet transmitting fibrous reinforcement with a resin composition composed of, as essential components, (a) 40-70 parts by weight of epoxy (meth)acrylate oligomer, (b) 60-30 parts by weight of reactive diluent of monofunctional and/or multifunctional (meth)acrylate, (c) 5-20 parts by weight of xylene-formaldehyde resin, and (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a), (b), and (c)) of ultraviolet-sensitive polymerization initiator, and curing the resin composition by irradiation with ultraviolet rays.
Claim 7
Dependent Claim
89 words
A process for producing a fiber optic rod which comprises impregnating an ultraviolet transmitting fibrous reinforcement with a resin composition composed of, as essential components, (a) 40-70 parts by weight of epoxy (meth)acrylate oligomer, (b) 60-30 parts by weight of reactive diluent of monofunctional and/or multifunctional (meth)acrylate, (c) 5-20 parts by weight of xylene-formaldehyde resin, and (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a), (b), and (c)) of ultraviolet-sensitive polymerization initiator, and curing the resin composition by irradiation with ultraviolet rays.
Claim 8
Dependent Claim
48 words
A process for producing a fiber optic rod as defined in claim 5, wherein the epoxy (meth)acrylate oligomer is one which is formed by adding (meth)acrylic acid to an epoxy compound and has two or more (meth)acryloyl groups in the molecule and a number-average molecular weight of 500-5000.
Claim 9
Dependent Claim
50 words
A process for producing a fiber optic rod as defined in claim 6, wherein the epoxy compound is at least one species selected from the group consisting of bis-phenol-A type epoxy compound, hydrogenated bisphenol-A epoxy compound, modified bisphenol-A type epoxy compound, epoxy compound of (poly)-alkylene glycol, and novolak-type epoxy compound.
Claim 10
Dependent Claim
40 words
A process for producing a fiber optic rod as defined in any of claims 5 to 7, wherein the xylene-formaldehyde resin is one which is formed by addition-condensation of m-xylene and formaldehyde and has a number-average molecular weight of 250-700.
Claim 11
Dependent Claim
83 words
A fiber optic rod which comprises an ultraviolet transmitting fibrous reinforcement impregnated, followed by curing, with a resin composition composed of, as essential components, (a 1 ) 30-70 parts by weight of acid anhydride-modified epoxy (meth)acrylate obtained by reaction between epoxy (meth)acrylate oligomer and organic acid intra-molecular anhydride, (b) 70-30 parts by weight of reactive diluent of mono-functional and/or multifunctional (meth)acrylate, (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a) and (b)) of ultraviolet-sensitive polymerization initiator.
Claim 12
Dependent Claim
83 words
A fiber optic rod which comprises an ultraviolet transmitting fibrous reinforcement impregnated, followed by curing, with a resin composition composed of, as essential components, (a 1 ) 30-70 parts by weight of acid anhydride-modified epoxy (meth)acrylate obtained by reaction between epoxy (meth)acrylate oligomer and organic acid intra-molecular anhydride, (b) 70-30 parts by weight of reactive diluent of mono-functional and/or multifunctional (meth)acrylate, (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a) and (b)) of ultraviolet-sensitive polymerization initiator.
Claim 13
Dependent Claim
59 words
A fiber optic rod as defined in claim 9, wherein the acid anhydride-modified epoxy (meth)acrylate is one which is obtained by the reaction of an organic acid intramolecular anhydride with an oligomer having two or more (meth)acryloyl groups in the molecule and a number-average molecular weight of 500-5000 which is formed by adding (meth)acrylic acid to an epoxy compound.
Claim 14
Dependent Claim
41 words
A fiber optic rod as defined in claim 9 or 10, wherein the acid anhydride-modified epoxy (meth)acrylate is one which is obtained by modifying more than 30 mol % of the hydroxyl groups in epoxy (meth)acrylate oligomer with an acid anhydride.
Claim 15
Dependent Claim
94 words
A process for producing a fiber optic rod which comprises impregnating an ultraviolet transmitting fibrous reinforcement with a resin composition composed of, as essential components, (a 1 ) 30-70 parts by weight of acid anhydride-modified epoxy (meth)acrylate obtained by reaction between epoxy (meth)acrylate oligomer and organic acid intramolecular anhydride, (b) 70-30 parts by weight of reactive diluent of mono-functional and/or multifunctional (meth)acrylate, (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a) and (b)) of ultraviolet-sensitive polymerization initiator, and curing the resin composition by irradiation with ultraviolet rays.
Claim 16
Dependent Claim
94 words
A process for producing a fiber optic rod which comprises impregnating an ultraviolet transmitting fibrous reinforcement with a resin composition composed of, as essential components, (a 1 ) 30-70 parts by weight of acid anhydride-modified epoxy (meth)acrylate obtained by reaction between epoxy (meth)acrylate oligomer and organic acid intramolecular anhydride, (b) 70-30 parts by weight of reactive diluent of mono-functional and/or multifunctional (meth)acrylate, (d) 1-10 parts by weight (for 100 parts by weight of the total amount of (a) and (b)) of ultraviolet-sensitive polymerization initiator, and curing the resin composition by irradiation with ultraviolet rays.
Claim 17
Dependent Claim
63 words
A process for producing a fiber optic rod as defined in claim 12, wherein the acid anhydride-modified epoxy (meth)acrylate is one which is obtained by the reaction of an organic acid intramolecular anhydride with an oligomer having two or more (meth)acryloyl groups in the molecule and a number-average molecular weight of 500-5000 which is formed by adding (meth)acrylic acid to an epoxy compound.
Claim 18
Dependent Claim
45 words
A process for producing a fiber optic rod as defined in claim 12 or 13, wherein the acid anhydride-modified epoxy (meth)acrylate is one which is obtained by modifying more than 30 mol % of the hydroxyl groups in epoxy (meth)acrylate oligomer with an acid anhydride.
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) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |