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US3855055A
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US
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Laminated safety glass and interlayer therefor
Assignee: Sekisui Chemical Co Ltd
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Filing: 1974-01-22
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Granted: 1974-12-17
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Expires: 1994-01-22
Abstract
Abstract An interlayer for laminated safety glass comprising (1) a mixture of a plasticized polyvinyl acetal resin with a specific norbornane compound or (2) a sheet of the plasticized polyvinyl acetal resin and a coating of the norbornane compound adhering thereto, and a laminated safety glass comprising at least two sheets of glass bonded together with said interlayer.
Inventors
- 👤 I Kanno
- 👤 T Takashima
- 👤 Y Bokuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:05
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/3163
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
47 words
A LAMINATED SAFETY GLASS COMPRISING AT LEAST TWO SHEETS OF GLASS BONDED TOGETHER WITH AN INTERLAYER CONSISTING OF A MIXTURE OF A PLASTICIZED POLYVINYL ACETAL RESIN AND 0.005-0.5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE POLYVINYL ACETAL RESIN, OF A NORBORNACE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
47 words
A LAMINATED SAFETY GLASS COMPRISING AT LEAST TWO SHEETS OF GLASS BONDED TOGETHER WITH AN INTERLAYER CONSISTING OF A MIXTURE OF A PLASTICIZED POLYVINYL ACETAL RESIN AND 0.005-0.5 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE POLYVINYL ACETAL RESIN, OF A NORBORNACE COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
25 words
A laminated safety glass according to claim 1 wherein R1 and R2 in the formula of said norbornane compound are each a lower alkyl group.
Claim 4
Dependent Claim
22 words
A laminated safety glass according to claim 1 wherein R1 and R2 in the formula of said norbornane compound are methyl groups.
Claim 5
Dependent Claim
19 words
A laminated safety glass according to claim 1 wherein said norbornane compound is a cadmium salt of 2-methyl-norbornane-2-carboxylic acid.
Claim 6
Dependent Claim
30 words
A laminated safety glass according to claim 1 wherein said norbornane compound is contained in an amount of 0.01 - 0.15 percent by weight based on the polyvinyl Acetal resin.
Claim 7
Dependent Claim
20 words
A laminated safety glass according to claim 1 wherein said plasticized polyvinyl acetal resin is a plasticized polyvinyl butyral resin.
Claim 8
Dependent Claim
20 words
A laminated safety glass according to claim 1 wherein the moisture content thereof is 0.2 - 0.8 percent by weight.
Claim 9
Dependent Claim
53 words
A LAMINATED SAFETY GLASS COMPRISING AT LEAST TWO SHEETS OF GLASS BONDED TOGETHER WITH AN INTERLAYER, SAID INTERLAYER, SAID I SISTING OF A SHEET OF PLASTICIZED POLYVINYL ACETAL RESIN, TO THE SURFACE OF WHICH HAS BEEN ADHERED BETWEEN 30-150 MG PER SSQUARE METER OF THE SHEET OF A NORBORNANE COMPOUND OF THE FORMULA
Claim 10
Dependent Claim
53 words
A LAMINATED SAFETY GLASS COMPRISING AT LEAST TWO SHEETS OF GLASS BONDED TOGETHER WITH AN INTERLAYER, SAID INTERLAYER, SAID I SISTING OF A SHEET OF PLASTICIZED POLYVINYL ACETAL RESIN, TO THE SURFACE OF WHICH HAS BEEN ADHERED BETWEEN 30-150 MG PER SSQUARE METER OF THE SHEET OF A NORBORNANE COMPOUND OF THE FORMULA
Claim 11
Dependent Claim
25 words
A laminated safety glass according to claim 8 wherein R1 and R2 in the formula of said norbornane compound are each a lower alkyl group.
Claim 12
Dependent Claim
22 words
A laminated safety glass according to claim 8 wherein R1 and R2 in the formula of said norbornane compound are methyl groups.
Claim 13
Dependent Claim
19 words
A laminated safety glass according to claim 8 wherein said norbornane compound is a cadmium salt of 2-methyl-norbornane-2-carboxylic acid.
Claim 14
Dependent Claim
30 words
A laminated safety glass according to claim 8 wherein the amount of said norbornane compound to be adhered ranges between 40 - 80 mg per square meter of the sheet.
Claim 15
Dependent Claim
20 words
A laminated safety glass according to claim 8 wherein said plasticized polyvinyl acetal resin is a plasticized polyvinyl butyral resin.
Claim 16
Dependent Claim
20 words
A laminated safety glass according to claim 8 wherein the moisture content thereof is 0.2 - 0.8 percent by weight.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |