US4307133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the application of a polymer coating to a metal surface and polymer powder suitable for the method
Assignee: Stamicarbon BV
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Filing: 1980-06-09
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Granted: 1981-12-22
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Expires: 2000-06-09
Abstract
Abstract Compositions of polyolefins having from 0.5 to 80% by weight of unstabilized polyethylene powder and from 20% to 99.5% by weight of a stabilized polyolefin powder. These powdered compositions have superior adhesion to metallic objects and can be applied directly to heated metallic objects to provide the protective coating.
Inventors
- 👤 Frans J. J. Haselier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:04
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/06; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
In a method for the application of a polymer coating to a metal surface, wherein a powder of at least one polyolefin is applied to a heated metal surface to form such coating, the improvement consisting essentially in employing a polymer powder mixture consisting essentially of from 0.5 to 80% by weight of unstabilized polyethylene powder and 20 to 99.5% by weight of a stabilized polyolefin powder.
Claim 2
Dependent Claim
67 words
In a method for the application of a polymer coating to a metal surface, wherein a powder of at least one polyolefin is applied to a heated metal surface to form such coating, the improvement consisting essentially in employing a polymer powder mixture consisting essentially of from 0.5 to 80% by weight of unstabilized polyethylene powder and 20 to 99.5% by weight of a stabilized polyolefin powder.
Claim 3
Dependent Claim
11 words
The method according to claim 1, wherein said polyolefin is polyethylene.
Claim 4
Dependent Claim
23 words
The method according to either claim 1 or 2, wherein said polyethylene has a density of between 905 and 940 kg/m 3 .
Claim 5
Dependent Claim
19 words
The method according to claim 2, wherein the stabilized powder contains from 0.01 to 5.0% by weight of stabilizer.
Claim 6
Independent Claim
33 words
The method according to claims 1, 2 or 4, wherein from 1 to 30% by weight of unstabilized polyethylene powder and from 70 to 99% by weight of stabilized polyolefin powder are used.
Claim 7
Independent Claim
27 words
The method according to claims 1, 2, or 4, wherein the powder used has an average particle size (d 50 ) of between 0.1 and 0.5 mm.
Claim 8
Dependent Claim
26 words
A polymer powder consisting of from 0.5 to 80% by weight of unstabilized polyethylene powder and from 20 to 99.5% by weight of stabilized polyolefin powder.
Claim 9
Dependent Claim
26 words
A polymer powder consisting of from 0.5 to 80% by weight of unstabilized polyethylene powder and from 20 to 99.5% by weight of stabilized polyolefin powder.
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) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |