Patent US4443588A successfully refreshed from Google Patents.
US4443588A
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Highly refractive urethane polymers for use in optical lenses and lenses prepared therefrom
Assignee: Toray Industries Inc
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Filing: 1982-02-17
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Granted: 1984-04-17
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Expires: 2002-02-17
Abstract
Abstract Highly refractive urethane polymers for use in optical lenses and the lenses produced therefrom are obtained by polymerizing at least one unsaturated urethane compound which is the reaction product of at least one xylylene diisocyanate and at least one compound selected from the group comprising: ##STR1## where: R 1 is either H or CH 3 R 2 is a remnant radical of a substituent or non-substituent hydrocarbon having 2-4 carbon atoms; ##STR2## where: R 3 is either H or CH 3 m=2-5; CH.sub.2 =CH--CH.sub.2 --OH; and 3 (CH.sub.2 =CH--CH.sub.2 --O--CH.sub.2).sub.2 CHOH. 4
Inventors
- 👤 Tadanori Fukuda
- 👤 Tadayo Matsunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:31
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; C; C08; C08F; C08F18/00; C08F18/22; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A lens having a refractive index n D 20 of more than 1.55 comprising a highly refractive, highly uniformly refractive, hard, thermosetting polymerization product of at least one unsaturated urethane compound, said unsaturated urethane compound being a reaction product of at least one xylylene diisocyanate with at least one compound selected from the group consisting of: ##STR7## where: R 1 is either H or CH 3 ; and R 2 is a remnant radical of a substituent or non-substituent hydrocarbon having 2-4 carbon atoms; ##STR8## where: R 3 is either H or CH 3 ; and m=2-5; CH.sub.2 ═CH--CH.sub.2 --OH; (c) and (CH.sub.2 ═CH--CH.sub.2 --O--CH.sub.2).sub.2 --CHOH (d).
Claim 2
Dependent Claim
107 words
A lens having a refractive index n D 20 of more than 1.55 comprising a highly refractive, highly uniformly refractive, hard, thermosetting polymerization product of at least one unsaturated urethane compound, said unsaturated urethane compound being a reaction product of at least one xylylene diisocyanate with at least one compound selected from the group consisting of: ##STR7## where: R 1 is either H or CH 3 ; and R 2 is a remnant radical of a substituent or non-substituent hydrocarbon having 2-4 carbon atoms; ##STR8## where: R 3 is either H or CH 3 ; and m=2-5; CH.sub.2 ═CH--CH.sub.2 --OH; (c) and (CH.sub.2 ═CH--CH.sub.2 --O--CH.sub.2).sub.2 --CHOH (d).
Claim 3
Dependent Claim
33 words
A lens as defined in claim 1, wherein said polymer is the co-polymerization product of a mixture comprising at least one of said unsaturated urethane compounds and at least one radically polymerizable monomer.
Claim 4
Dependent Claim
41 words
A lens as defined in claim 1, wherein said polymer is the polymerization and polyaddition product of a mixture comprising at least one of said unsaturated urethane compounds, and at least one compounds having at least two hydroxyl groups per molecule.
Claim 5
Dependent Claim
47 words
A lens as defined in claim 1, wherein said polymer is the copolymerization and poly-addition product of a mixture comprising at least one of said unsaturated urethane compounds, at least one radically polymerizable monomer and at least one compound having at least two hydroxyl groups per molecule.
Claim 6
Dependent Claim
25 words
The lens as described in claim 1, 2, 3 or 4, wherein said unsaturated urethane compound comprises at least 40% by weight of said mixture.
Claim 7
Dependent Claim
35 words
The lens as described in claim 2 or 3, wherein said radically polymerizable monomers are selected from the group consisting of styrene, phenyl(meth)acrylate, benzyl(meth)acrylate, diallyl phthalate, triallyl trimellitate, phenylacrylate, benzylacrylate, phenoxyethylmethacrylate, phenoxyethylacrylate and mixtures thereof.
Claim 8
Dependent Claim
33 words
A lens as defined in claim 3 or 4, wherein said compound having at least two hydroxyl groups per molecule is selected from the group consisting of glycerol, ethylene glycol and cyclohexane dimethanol.
References Cited (Backward Citations)
US3553174A
Cited
US3907865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |