US4374890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive-sheet for the reinforcement of metal plates and method of reinforcing metal plates
Assignee: Nitto Denko Corp
•
Filing: 1981-11-25
•
Granted: 1983-02-22
•
Expires: 2001-11-25
Abstract
Abstract An adhesive-sheet for the reinforcement of metal plate, and a method of reinforcing metal plates using an adhesive-sheet, are described. The adhesive-sheet comprises a first epoxy resin composition layer and a second epoxy resin composition layer laminated thereon wherein the first epoxy resin composition layer, when cured by heating, has a modulus of elasticity in tension sufficient to increase the stiffness of the metal plate, whereas the second epoxy resin composition layer, when cured by heating, has a modulus of elasticity in tension insufficient to increase the stiffness of the metal plate.
Inventors
- 👤 Masato Shimizu
- 👤 Eishi Asoshina
- 👤 Takashi Tominaga
- 👤 Tadahiro Muguruma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:27
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/092; B32B27/00; B32B27/38; B32B15/18; B32B27/18; B32B27/20; B32B7/00; B32B7/02; B32B7/04; B32B7/12; C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; B32B38/00; B32B2038/0052; B32B2038/0076; B32B2262/00; B32B2262/10; B32B2262/101; B32B2264/00; B32B2264/10; B32B2264/102; B32B2264/104; B32B2307/00; B32B2307/50; B32B2307/51; B32B2315/00; B32B2315/12; B32B2605/00; B32B2605/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/28; Y10T428/2804; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2848; Y10T428/2852; Y10T428/287; Y10T428/31504; Y10T428/31511; Y10T428/31678
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
An adhesive-sheet for the reinforcement of metal plate, comprising a first epoxy resin composition layer and a second epoxy resin composition layer laminated thereon wherein the first epoxy resin composition layer is prepared so that when provided on the metal plate and cured by heating, it has a modulus of elasticity in tension sufficient to increase the stiffness of the metal plate, and the second epoxy resin composition layer is prepared so that when provided on and adhered to the metal plate and cured by heating, it has a modulus of elasticity in tension insufficient to increase the stiffness of the metal plate.
Claim 2
Dependent Claim
103 words
An adhesive-sheet for the reinforcement of metal plate, comprising a first epoxy resin composition layer and a second epoxy resin composition layer laminated thereon wherein the first epoxy resin composition layer is prepared so that when provided on the metal plate and cured by heating, it has a modulus of elasticity in tension sufficient to increase the stiffness of the metal plate, and the second epoxy resin composition layer is prepared so that when provided on and adhered to the metal plate and cured by heating, it has a modulus of elasticity in tension insufficient to increase the stiffness of the metal plate.
Claim 3
Dependent Claim
52 words
The adhesive-sheet as in claim 1, wherein the modulus of elasticity in tension of the heat-cured first epoxy resin composition layer is from 30 to 500 kg/mm 2 , and the modulus of elasticity in tension of the heat-cured second epoxy resin composition layer is from 0.1 to 22 kg/mm 2 .
Claim 4
Dependent Claim
40 words
The adhesive-sheet as in claim 1 or 2, wherein the thickness of said first epoxy resin composition layer is from 0.01 to 10 mm, and the thickness of the second epoxy resin composition layer is from 0.1 to 30 mm.
Claim 5
Dependent Claim
20 words
The adhesive-sheet as in claim 1 or 2, wherein a reinforcement is embedded in the first epoxy resin composition layer.
Claim 6
Dependent Claim
14 words
The adhesive sheet as in claim 4, wherein the reinforcement is a glass fiber.
Claim 7
Dependent Claim
20 words
The adhesive-sheet as in claim 1 or 2, wherein at least the second epoxy resin composition layer has adhesive properties.
Claim 8
Dependent Claim
20 words
The adhesive-sheet as in claim 1 or 2, wherein the metal plate is a body steel plate of a vehicle.
Claim 9
Independent Claim
130 words
A method for reinforcing a metal plate comprising applying thereto an adhesive-sheet comprising a first epoxy resin composition layer and a second epoxy resin composition layer laminated thereon, wherein the first epoxy resin composition layer is prepared so that when provided on the metal plate and cured by heating, it has a modulus of elasticity in tension sufficient to increase the stiffness of the metal plate, and the second epoxy resin composition layer is prepared so that when provided on the metal plate and cured by heating, it has a modulus of elasticity in tension insufficient to increase the stiffness of the metal plate, in such a manner that the second epoxy resin composition layer comes into contact with the metal plate, and, thereafter, curing the adhesive sheet by heating.
Claim 10
Independent Claim
130 words
A method for reinforcing a metal plate comprising applying thereto an adhesive-sheet comprising a first epoxy resin composition layer and a second epoxy resin composition layer laminated thereon, wherein the first epoxy resin composition layer is prepared so that when provided on the metal plate and cured by heating, it has a modulus of elasticity in tension sufficient to increase the stiffness of the metal plate, and the second epoxy resin composition layer is prepared so that when provided on the metal plate and cured by heating, it has a modulus of elasticity in tension insufficient to increase the stiffness of the metal plate, in such a manner that the second epoxy resin composition layer comes into contact with the metal plate, and, thereafter, curing the adhesive sheet by heating.
Claim 11
Dependent Claim
49 words
The method as in claim 8, wherein the modulus of elasticity in tension of the heat-cured first epoxy resin composition layer is 30 to 500 kg/mm 2 and the modulus of elasticity in tension of the heat-cured second epoxy resin composition layer is 0.1 to 22 kg/mm 2 .
Claim 12
Dependent Claim
40 words
The method as in claim 8 or 9, wherein the thickness of the first epoxy resin composition layer is from 0.01 to 10 mm, and the thickness of the second epoxy resin composition layer is from 0.1 to 30 mm.
Claim 13
Dependent Claim
20 words
The method as in claim 8 or 9, wherein at least the second epoxy resin composition layer has adhesive properties.
Claim 14
Dependent Claim
20 words
The method as in claim 8 or 9, wherein a reinforcement is embedded in the first epoxy resin composition layer.
Claim 15
Dependent Claim
40 words
The method as in claim 8 or 9, wherein a reinforcement is embedded in the first epoxy resin composition layer, and the reinforcement and the adhesive-sheet are applied as a unitary material onto the metal plate and cured by heating.
Claim 16
Dependent Claim
13 words
The method as in claim 12, wherein the reinforcement is a glass fiber.
Claim 17
Dependent Claim
41 words
The method as in claim 8 or 9, wherein the metal plate is a steel plate forming part of the body of a vehicle, and the adhesive-sheet is applied to the back surface of the steel plate and cured by heating.
References Cited (Backward Citations)
US4158713A
Cited
US4343843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |