Patent US4774137A successfully refreshed from Google Patents.
US4774137A
Expired / Lapsed
US
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Synthetic resin powders for coatings with reduced surface resistance
Assignee: Bayer AG
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Filing: 1987-07-13
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Granted: 1988-09-27
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Expires: 2007-07-13
Abstract
Abstract This invention relates to synthetic resin powders for coating agents and the use thereof for the production of coatings with reduced surface resistance.
Inventors
- 👤 Heinrich Alberts
- 👤 Hans-Heribert Burgdorfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08J; C08J3/00; C08J3/20; C08J3/203; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 words
In a synthetic resin powder for a coating composition containing electrically conductive additives, the improvement comprises incorporating 0.01 to 1.5% by weight of the conductive additives in the synthetic resin powder in an intensive mixer at an elevated temperature until the surface of the synthetic resin powder thermoplastically softens and the additive is bound on the surface of the polymer.
Claim 2
Dependent Claim
60 words
In a synthetic resin powder for a coating composition containing electrically conductive additives, the improvement comprises incorporating 0.01 to 1.5% by weight of the conductive additives in the synthetic resin powder in an intensive mixer at an elevated temperature until the surface of the synthetic resin powder thermoplastically softens and the additive is bound on the surface of the polymer.
Claim 3
Dependent Claim
65 words
Synthetic resin powder according to claim 1, containing from 0.01 to 0.5% by weight of conductive additives, characterised in that the incorporation of the conductive additives in the synthetic resin powder takes place in an intensive mixer, continuing the mixing process at an elevated temperature until the surface of the synthetic powder thermoplastically softens and the additive is bound on the surface of the polymer.
Claim 4
Dependent Claim
18 words
Synthetic resin powders according to claim 1, characterised in that conductive carbon black is used as conductive additive.
Claim 5
Dependent Claim
22 words
Synthetic resin powders according to claim 1, characterised in that a saponified ethylene vinyl acetate copolymer is used as synthetic resin powder.
Claim 6
Dependent Claim
25 words
Synthetic resin powders according to claim 4, characterised in that from 0.01 to 1.5% by weight of conductive carbon black is used as conductive additive.
Claim 7
Dependent Claim
22 words
Synthetic resin powders according to claim 5, characterised in that from 0.1 to 0.5% by weight of conductive carbon black is used.
Claim 8
Dependent Claim
22 words
Synthetic resin powders according to claim 4 characterized in that from 0.1 to 0.5% by weight of conductive carbon black is used.
Claim 9
Dependent Claim
17 words
Synthetic resin powders according to claim 1 wherein the electrical surface resistance is at most 10 ohm.cm.
Claim 10
Dependent Claim
16 words
Synthetic resin powders according to claim 8 wherein the resistance is less than 10 6 ohm.cm.
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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |