US4915997A
Expired / Lapsed
US
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Optical information recording medium
Assignee: Ricoh Co Ltd
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Filing: 1988-10-03
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Granted: 1990-04-10
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Expires: 2008-10-03
Abstract
Abstract An optical information recording medium is disclosed which comprises a pair of substrates at least one of which has a recording layer on one side thereof and which are placed opposingly to each other so that said recording layer is positioned on the inside and are bonded to each other by adhesive layer(s) with or without spacer(s) therebetween to form a sealed structure, wherein said adhesive layer is composed of a cured adhesive material formed from (a) an epoxy resin, (b) a photolyzable organosilicon compound and (c) an aluminum complex compound, said photolyzable organosilicon compound being a silicon compound having at least one phenyl group which has at least one fluorine atom and at least one o-nitrobenzyloxy group which may have a substituent. The said photolyzable oganosilicon compound may be replaced by a mixture of (b-1) a silicon compound having at least one phenyl group having at least one fluorine atom and at least one o-nitrobenzyloxy group which may have a substituent, and (b-2) a silicon compound having at least one phenyl group having no substituents and at least one o-nitrobenzyloxy group which may have a substituent.
Inventors
- 👤 Tetsu Yamamuro
- 👤 Yutaka Ueda
- 👤 Eiji Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:22
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0755; C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; G11; G11B; G11B7/00; G11B7/24; G11B7/24015; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/149
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
227 words
An optical information recording medium comprising a pair of substrates at least one of which has a recording layer on a part of one side thereof, which are placed opposingly to each other so that said recording layer is positioned on the inside and which are bonded to each other by photopolymerizable adhesive layer(s) with or without spacer(s) therebetween to form a sealed structure, said adhesive layer being composed of a cured adhesive formed from a composition comprising (a) an epoxy resin, (b) a photolyzable organosilicon compound of 0.5 to 15% by weight based on the epoxy resin, which is represent by the following formula (I): ##STR14## (wherein R 1 represents a fluorine atom; R 2 represents a lower alkyl group, a lower unsaturated alkyl group and aromatic group, and is the same or different from each other when m is 2; R 3 , R 4 , R 5 and R 6 are the same or different from each other and represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a nitro group, a cyano group and an alkoxy group; l is an integer of 1 to 5; m is 0, 1 and 2; and n is an integer of 1 to 3, but m+n≦3), and (c) an aluminum complex compound of 0.01 to 10% by weight based on the epoxy resin.
Claim 2
Dependent Claim
227 words
An optical information recording medium comprising a pair of substrates at least one of which has a recording layer on a part of one side thereof, which are placed opposingly to each other so that said recording layer is positioned on the inside and which are bonded to each other by photopolymerizable adhesive layer(s) with or without spacer(s) therebetween to form a sealed structure, said adhesive layer being composed of a cured adhesive formed from a composition comprising (a) an epoxy resin, (b) a photolyzable organosilicon compound of 0.5 to 15% by weight based on the epoxy resin, which is represent by the following formula (I): ##STR14## (wherein R 1 represents a fluorine atom; R 2 represents a lower alkyl group, a lower unsaturated alkyl group and aromatic group, and is the same or different from each other when m is 2; R 3 , R 4 , R 5 and R 6 are the same or different from each other and represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a nitro group, a cyano group and an alkoxy group; l is an integer of 1 to 5; m is 0, 1 and 2; and n is an integer of 1 to 3, but m+n≦3), and (c) an aluminum complex compound of 0.01 to 10% by weight based on the epoxy resin.
Claim 3
Dependent Claim
47 words
An optical information recording medium according to claim 1, wherein an amount of the photolyzable organosilicon compound is 0.5 to 12% by weight based on the epoxy resin and an amount of the aluminum complex compound is 0.5 to 5% by weight based on the epoxy resin.
Claim 4
Dependent Claim
290 words
An optical information recording medium comprising a pair of substrates at least one of which has a recording layer on a part of one side thereof, which are placed opposingly to each other so that said recording layer is positioned on the inside and which are bonded to each other by photopolymerizable adhesive layer(s) with or without spacer(s) therebetween to form a sealed structure, said adhesive layer being composed of a cured adhesive formed from a composition comprising (a) an epoxy resin, (b) a photolyzable organosilicon composition of 0.55 to 37.5% by weight based on the epoxy resin, which the photolyzable organosilicon composition comprises a mixture of (b-1) a photolyzable organosilicon compound represented by the following formula (I): ##STR15## (wherein R 1 represents a fluorine atom: R 2 represents a lower alkyl group, a lower unsaturated alkyl group and aromatic group, and is the same or different from each other when m is 2; R 3 , R 4 , R 5 and R 6 are the same or different from each other, and represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a nitro group, a cyano group and an alkoxy group; l is an integer of 1 to 5; m is 0, 1 and 2; and n is an integer of 1 to 3, but m+n≦3), and (b-2) a silicon compound having at least one phenyl group having no substituents and at least one o-nitrobenzyloxy group having a substituent or no substituents, the amount of the silicon compound being in the range of from 0.1 to 1.5 times by weight as large as the photolyzable organosilicon compound, and (c) an aluminum complex compound of 0.01 to 10% by weight based on the epoxy resin.
Claim 5
Dependent Claim
290 words
An optical information recording medium comprising a pair of substrates at least one of which has a recording layer on a part of one side thereof, which are placed opposingly to each other so that said recording layer is positioned on the inside and which are bonded to each other by photopolymerizable adhesive layer(s) with or without spacer(s) therebetween to form a sealed structure, said adhesive layer being composed of a cured adhesive formed from a composition comprising (a) an epoxy resin, (b) a photolyzable organosilicon composition of 0.55 to 37.5% by weight based on the epoxy resin, which the photolyzable organosilicon composition comprises a mixture of (b-1) a photolyzable organosilicon compound represented by the following formula (I): ##STR15## (wherein R 1 represents a fluorine atom: R 2 represents a lower alkyl group, a lower unsaturated alkyl group and aromatic group, and is the same or different from each other when m is 2; R 3 , R 4 , R 5 and R 6 are the same or different from each other, and represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a nitro group, a cyano group and an alkoxy group; l is an integer of 1 to 5; m is 0, 1 and 2; and n is an integer of 1 to 3, but m+n≦3), and (b-2) a silicon compound having at least one phenyl group having no substituents and at least one o-nitrobenzyloxy group having a substituent or no substituents, the amount of the silicon compound being in the range of from 0.1 to 1.5 times by weight as large as the photolyzable organosilicon compound, and (c) an aluminum complex compound of 0.01 to 10% by weight based on the epoxy resin.
Claim 6
Dependent Claim
47 words
An optical information recording medium according to claim 3, wherein an amount of the photolyzable organosilicon composition is 0.60 to 30% by weight based on the epoxy resin and an amount of the aluminum complex compound is 0.5 to 5% by weight based on the epoxy resin.
Claim 7
Dependent Claim
19 words
An optical information recording medium according to claim 3, wherein the silicon compound (b-2) is and o-nitrobenzylsilyl ether compound.
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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |