Patent US4820580A successfully refreshed from Google Patents.
US4820580A
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Process for the production of a composite system of a highly elastic material and a polyurethane foam layer and product formed thereby
Assignee: Bayer AG
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Filing: 1988-04-12
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Granted: 1989-04-11
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Expires: 2008-04-12
Abstract
Abstract Composite materials are formed by subjecting a highly elastic material to a plasma treatment and then allowing a polyurethane foam forming mixture to foam on the plasma treated surface. These composites are particularly useful as shoe soles and as insulating materials.
Inventors
- 👤 Jurgen Hocker
- 👤 Jurgen Faehndrich
- 👤 Hans Hespe
- 👤 Kirkor Sirinyan
- 👤 Dieter Wecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/045; A; A43; A43B; A43B9/00; A43B9/12; B32B25/12; B32B25/16; B32B27/00; B32B27/16; B32B5/00; B32B5/18; B32B5/20; B32B7/00; B32B7/04; B32B7/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4238; C08G18/48; C08G18/4804; C08G18/4812; C08L; C08L75/00; C08L75/04; C08L75/06; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2307/00; B32B2307/20; B32B2307/206; B32B2307/50; B32B2307/536; B32B2307/70; B32B2307/72; B32B2310/00; B32B2310/04; B32B2310/0409; B32B2310/14; B32B2317/00; B32B2317/22; B32B2437/00; B32B2437/02; B32B2457/00; B32B2457/04; C08G2110/00; C08G2110/0008; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
A process for the production of a composite system of a highly elastic material and a polyurethane foam layer in which the surface of the highly elastic material is subjected to a plasma treatment and a polyurethane foam layer is then foamed thereon.
Claim 2
Dependent Claim
43 words
A process for the production of a composite system of a highly elastic material and a polyurethane foam layer in which the surface of the highly elastic material is subjected to a plasma treatment and a polyurethane foam layer is then foamed thereon.
Claim 3
Dependent Claim
24 words
The process of claim 1 in which the surface of the highly elastic material is degreased with a non-etching solvent before the plasma treatment.
Claim 4
Dependent Claim
30 words
The process of claim 1 in which the plasma treatment is carried out in a high-frequency plasma with microwaves or in a high frequency plasma supported by a magnetic field.
Claim 5
Dependent Claim
55 words
The process of claim 1 in which the highly elastic material used has a glass transition temperature T G of from -80° C. to +40° C. and the polyurethane foam layer is based on a polyurethane having a density of 0.2 to 0.8 g/cm 3 and a Shore A hardness of from 30 to 90.
Claim 6
Dependent Claim
41 words
The process of claim 1 in which Ar, He, O 2 , O 3 , N 2 , SO 3 , SO 2 , CF 4 or CF 2 ═CF 2 or a mixture thereof is used as the plasma gas.
Claim 7
Dependent Claim
19 words
A composite of a highly elastic material and a polyurethane foam layer produced by the process of claim 1.
Claim 8
Dependent Claim
18 words
A composite of a highly elastic material and a polyurethane layer produced by the process of claim 4.
Claim 9
Dependent Claim
10 words
A shoe sole formed from the composite of claim 6.
Claim 10
Dependent Claim
10 words
A shoe sole formed from the composite of claim 7.
References Cited (Backward Citations)
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US4263408A
Cited
GB2053026A
Cited
US4563086A
Cited
DE3514864A1
Cited
US4714650A
Cited
EP0249198A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |