Patent US4487904A successfully refreshed from Google Patents.
US4487904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethanized acrylic resin material for plastic lens and lens composed thereof
Assignee: Toray Industries Inc
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Filing: 1983-09-21
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Granted: 1984-12-11
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Expires: 2003-09-21
Abstract
Abstract A polymer obtained by polymerizing a urethanized acrylic or methacrylic monomer obtained by reacting the hydroxyl group of an acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring and a hydroxyl group with the isocyanate group of a polyfunctional isocyanate is excellent and has a high refractive index. Accordingly, this polymer is valuable as a resin material for a plastic lens.
Inventors
- 👤 Tadanori Fukuda
- 👤 Sadayuki Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:46
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
213 words
A resin material for a plastic lens, having a refractive index of at least 1.58 and comprising a homopolymer formed by polymerizing a urethanized acrylic or methacrylic monomer or a copolymer formed by copolymerizing a urethanized acrylic or methacrylic monomer with another vinyl monomer having an aromatic ring, said urethanized acrylic or methacrylic monomer being a product of a reaction of a hydroxyl group of an acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring with an isocyanate group of a polyfunctional isocyanate, said acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring and a hydroxyl group in the molecule being at least one member selected from the group consisting of compounds, represented by the following general formulae (I), (II) and (III): ##STR2## wherein X is chlorine, bromine or iodine, each of R 1 and R 2 is hydrogen or a methyl group, n is an integer of from 1 to 4, and l and m are integers of from 0 to 4, with the proviso that the sum of l and m is from 0 to 4, and the amount of the vinyl monomer having an aromatic ring to be copolymerized with the urethanized acrylic or methacrylic monomer being up to 70% by weight based on the total weight of the monomers.
Claim 2
Dependent Claim
213 words
A resin material for a plastic lens, having a refractive index of at least 1.58 and comprising a homopolymer formed by polymerizing a urethanized acrylic or methacrylic monomer or a copolymer formed by copolymerizing a urethanized acrylic or methacrylic monomer with another vinyl monomer having an aromatic ring, said urethanized acrylic or methacrylic monomer being a product of a reaction of a hydroxyl group of an acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring with an isocyanate group of a polyfunctional isocyanate, said acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring and a hydroxyl group in the molecule being at least one member selected from the group consisting of compounds, represented by the following general formulae (I), (II) and (III): ##STR2## wherein X is chlorine, bromine or iodine, each of R 1 and R 2 is hydrogen or a methyl group, n is an integer of from 1 to 4, and l and m are integers of from 0 to 4, with the proviso that the sum of l and m is from 0 to 4, and the amount of the vinyl monomer having an aromatic ring to be copolymerized with the urethanized acrylic or methacrylic monomer being up to 70% by weight based on the total weight of the monomers.
Claim 3
Dependent Claim
209 words
A plastic lens, having a refractive index of at least 1.58 and comprising a homopolymer formed by cast-polymerizing a urethanized acrylic or methacrylic monomer or a copolymer formed by copolymerizing a urethanized acrylic or methacrylic monomer with another vinyl monomer having an aromatic ring, said urethanized acrylic or methacrylic monomer being a product of a reaction of a hydroxyl group of an acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring with an isocyanate group of a polyfunctional isocyanate, said acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring and a hydroxyl group in the molecule being at least one member selected from the group consisting of compounds represented by the following general formulae (I), (II) and (III): ##STR3## wherein X is chlorine, bromine or iodine, each of R 1 and R 2 is hydrogen or a methyl group, n is an integer of from 1 to 4, and l and m are integers of from 0 to 4, with the proviso that the sum of l and m is from 0 to 4, and the amount of the vinyl monomer having an aromatic ring to be copolymerized with the urethanized acrylic or methacrylic monomer being up to 70% by weight based on the total weight of the monomers.
Claim 4
Dependent Claim
209 words
A plastic lens, having a refractive index of at least 1.58 and comprising a homopolymer formed by cast-polymerizing a urethanized acrylic or methacrylic monomer or a copolymer formed by copolymerizing a urethanized acrylic or methacrylic monomer with another vinyl monomer having an aromatic ring, said urethanized acrylic or methacrylic monomer being a product of a reaction of a hydroxyl group of an acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring with an isocyanate group of a polyfunctional isocyanate, said acrylic or methacrylic monomer having a nucleus-halogen-substituted aromatic ring and a hydroxyl group in the molecule being at least one member selected from the group consisting of compounds represented by the following general formulae (I), (II) and (III): ##STR3## wherein X is chlorine, bromine or iodine, each of R 1 and R 2 is hydrogen or a methyl group, n is an integer of from 1 to 4, and l and m are integers of from 0 to 4, with the proviso that the sum of l and m is from 0 to 4, and the amount of the vinyl monomer having an aromatic ring to be copolymerized with the urethanized acrylic or methacrylic monomer being up to 70% by weight based on the total weight of the monomers.
Claim 5
Dependent Claim
25 words
A resin material for a plastic lens according to claim 1, wherein said other vinyl monomer having an aromatic ring has a nucleus-halogen-substituted aromatic ring.
Claim 6
Dependent Claim
29 words
A resin material for a plastic lens according to claim 3, wherein the halogen is at least one member selected from the group consisting of chlorine, bromine and iodine.
Claim 7
Dependent Claim
38 words
A resin material for a plastic lens according to claim 1, wherein said other vinyl monomer having an aromatic ring gives a polymer having a refractive index of at least 1.55 when said other vinyl monomer is homopolymerized.
Claim 8
Dependent Claim
18 words
A resin material for a plastic lens according to claim 1, wherein the polyfunctional isocyanate is a diisocyanate.
Claim 9
Dependent Claim
20 words
A resin material for a plastic lens according to claim 1, which has a refractive index of at least 1.60.
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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |