US4861637A
Expired / Lapsed
US
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Optical information recording medium
Assignee: Ricoh Co Ltd
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Filing: 1988-02-12
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Granted: 1989-08-29
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Expires: 2008-02-12
Abstract
Abstract An optical information recording medium comprises a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that the recording layer comes between the substrates, the adhesive agent comprising: (a) a compound of formula (I), ##STR1## wherein L 1 represents ##STR2## L 2 represents ##STR3## R 1 represents a methyl group or an ethyl group, and k is an integer of 1 to 4; and (b) one compound of selected from the group consisting of: a compound of formula (II), ##STR4## wherein R 2 represents hydrogen or a methyl group, and l is an integer of 3 to 15, a compound of formula (III), CH.sub.2 ═CHCOO--CH.sub.2).sub.l' OCOCH═CH.sub.2 (III) wherein l' is an integer of 4 to 6, and a mixture of the two compounds.
Inventors
- 👤 Yutaka Ueda
- 👤 Eiji Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:26
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/256; G11B7/242; G11B7/244; G11B7/246; G11B7/247; G11B7/245; G11B7/2472; G11B7/2475; G11B7/248; G11B7/253; G11B7/2531; G11B7/2532; G11B7/2533; G11B7/2534; G11B7/2535; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
An optical information recording medium comprising a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that said recording layer comes between said substrates, said adhesive agent comprising: (a) a compound of formula (I), ##STR113## wherein L 1 represents ##STR114## L 2 represents ##STR115## R 1 represents a methyl group or an ethyl group, and k is an integer of 1 to 4; and (b) (b) one compound selected from the group consisting of a compound of formula (II), ##STR116## wherein R 2 represents hydrogen or a methyl group, and l is an integer of 3 to 15, a compound of formula (III) CH.sub.2 ═CHCOO--CH.sub.2).sub.l' OCOCH═CH.sub.2 (III) wherein l' is an integer of 4 to 6, and a mixture of said compound of formula (II) and said compound of formula (III).
Claim 2
Dependent Claim
162 words
An optical information recording medium comprising a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that said recording layer comes between said substrates, said adhesive agent comprising: (a) a compound of formula (I), ##STR113## wherein L 1 represents ##STR114## L 2 represents ##STR115## R 1 represents a methyl group or an ethyl group, and k is an integer of 1 to 4; and (b) (b) one compound selected from the group consisting of a compound of formula (II), ##STR116## wherein R 2 represents hydrogen or a methyl group, and l is an integer of 3 to 15, a compound of formula (III) CH.sub.2 ═CHCOO--CH.sub.2).sub.l' OCOCH═CH.sub.2 (III) wherein l' is an integer of 4 to 6, and a mixture of said compound of formula (II) and said compound of formula (III).
Claim 3
Dependent Claim
26 words
The optical information recording medium as claimed in claim 1, wherein said adhesive agent further comprises an acrylate monomer having one acryloyl group (CH 2 ═CHCOO--).
Claim 4
Dependent Claim
47 words
The optical information recording medium as claimed in claim 1, wherein said adhesive agent comprises said compound of formula (I) in an amount of 40 wt. % to 70 wt. %, and said one component or a in an amount of not more than 40 wt. %.
Claim 5
Dependent Claim
28 words
The optical information recording medium as claimed in claim 2, wherein the amount of said acrylate monomer in said adhesive agent is not more than 30 wt. %.
Claim 6
Dependent Claim
22 words
The optical information recording medium as claimed in claim 4, wherein said acrylate monomer is selected from the group consisting of: ##STR117##
Claim 7
Dependent Claim
22 words
The optical information recording medium as claimed in claim 1, wherein said recording layer comprises as the main component a polymethine dye.
Claim 8
Dependent Claim
23 words
The optical information recording medium as claimed in claim 1, wherein said spacer comprises an inner circumferential spacer and an outer circumferential spacer.
References Cited (Backward Citations)
US4711798A
Cited
JPH111638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |