US5372749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for surface treating conductive copper powder with a treating agent and coupler
Assignee: BEIJING TECHNOLOGY OF PRINTING RESEARCH
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Filing: 1993-03-18
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Granted: 1994-12-13
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Expires: 2013-03-18
Abstract
Abstract A method for surface treating conductive copper powder comprises dispersing pure copper powder or silver-coated copper powder in a solution of coupling agent selected from the group consisting of silane, titanate, aluminate and zirconate and a ZB-3 treating agent which is the reaction products of peanut oil fatty acids, boric acid and triethanolamine in a molar ratio of 1:1:2 in an organic solvent, the total amount of the coupling agent and ZB-3 treating agent being controlled in the range of from 0.1% to 10%, based on the weight of the copper powder, filtering after 1 hour standing and drying at 40°-60° C. under vacuum.
Inventors
- 👤 Jiang Li
- 👤 Xijin Pan
- 👤 Shoudong You
- 👤 Shixiong Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:30
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; H01B1/026; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A method for surface treating conductive copper powder which comprises dispersing pure copper powder or silver-coated copper powder in a dilute solution of treating agent which is the reaction products of peanut oil fatty acids, boric acid and triethanolamine in a molar ratio of 1:1:2 and a coupler selected from the group consisting of silane, titanate, aluminate and zirconate in an organic solvent, filtering after 1 hour standing and then drying at 40° to 60° C. under vacuum.
Claim 2
Independent Claim
78 words
A method for surface treating conductive copper powder which comprises dispersing pure copper powder or silver-coated copper powder in a dilute solution of treating agent which is the reaction products of peanut oil fatty acids, boric acid and triethanolamine in a molar ratio of 1:1:2 and a coupler selected from the group consisting of silane, titanate, aluminate and zirconate in an organic solvent, filtering after 1 hour standing and then drying at 40° to 60° C. under vacuum.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the ratio of coupler to ZB-3 ranges from 5:95 to 95:5 by weight.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein the total amount of coupling agent and ZB-3 is from 0.1 to 10% based on the weight of the copper powder.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein the ratio of coupler to ZB-3 ranges from 30:70 to 70:30 by weight.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein the total amount of coupling agent and ZB-3 is from 0.5 to 5% based on the weight of the copper powder.
Claim 7
Dependent Claim
11 words
Conductive copper powder obtained by the method according to claim 1.
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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) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |