US4309484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated safety glass
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1980-10-16
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Granted: 1982-01-05
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Expires: 2000-10-16
Abstract
Abstract A laminated safety glass comprising at least two glass plates and an interlayer, said interlayer comprising a crosslinked product of a hydration reaction product of an ethylene copolymer comprising (1) 60 to 95% by weight of ethylene, (2) 5 to 40% by weight of glycidyl acrylate or methacrylate, (3) 0 to 20% by weight of one or more comonomer selected from the group consisting of a vinyl ester having 4 to 10 carbon atoms and an ester of acrylic or methacrylic acid with an alcohol having 1 to 12 carbon atoms, said hydration reaction product having a hydration rate of epoxy group of preferably 5 to 80% by mole, more preferably 30 to 70% by mole.
Inventors
- 👤 Tadayuki Ohmae
- 👤 Yoshinori Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:02
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10743; B32B17/10009; B32B17/10036; B32B17/10697; C; C08; C08F; C08F8/00; C08F8/12; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/50; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649; Y10T428/31855; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A laminated safety glass comprising at least two glass plates and an interlayer, said interlayer comprising a crosslinked product of a hydration reaction product of an ethylene copolymer comprising (1) 60 to 95% by weight of ethylene, (2) 5 to 40% by weight of glycidyl acrylate or methacrylate, and (3) 0 to 20% by weight of one or more comonomer selected from the group consisting of a vinyl ester having 4 to 10 carbon atoms and an ester of acrylic or methacrylic acid with an alcohol having 1 to 12 carbon atoms wherein said hydration reaction product has a hydration rate of the epoxy group of 5 to 80% per mole and said ethylene copolymer has a melt index of 10 to 500.
Claim 2
Dependent Claim
123 words
A laminated safety glass comprising at least two glass plates and an interlayer, said interlayer comprising a crosslinked product of a hydration reaction product of an ethylene copolymer comprising (1) 60 to 95% by weight of ethylene, (2) 5 to 40% by weight of glycidyl acrylate or methacrylate, and (3) 0 to 20% by weight of one or more comonomer selected from the group consisting of a vinyl ester having 4 to 10 carbon atoms and an ester of acrylic or methacrylic acid with an alcohol having 1 to 12 carbon atoms wherein said hydration reaction product has a hydration rate of the epoxy group of 5 to 80% per mole and said ethylene copolymer has a melt index of 10 to 500.
Claim 3
Dependent Claim
28 words
A laminated safety glass according to claim 1, wherein the hydration rate of epoxy group of the product is in the range of 30 to 70% by mole.
Claim 4
Dependent Claim
47 words
A laminated safety glass according to claim 1, wherein the ethylene copolymer is a three-component ethylene copolymer consisting essentially of 70 to 90% by weight of ethylene, 10 to 30% by weight of glycidyl methacrylate, and 3 to 15% by weight of vinyl acetate or methyl acrylate.
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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |