US4882090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophoretically overcoatable coatings applied by electrocoating
Assignee: BASF Farben und Fasern AG
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Filing: 1986-10-13
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Granted: 1989-11-21
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Expires: 2006-10-13
Abstract
Abstract The invention relates to cathodically depositable aqueous electropaints which contain cationic amine-modified epoxy resins and are pigmented with electroconductive carbon black and which, on deposition and crosslinking, provide electrophoretically overcoatable coatings and contain as electroconductive carbon black a carbon black having an iodine absorption of 870-930 mg/g, a specific surface area (BET/N 2 ) of 850-1,000 m 2 /g, a pore volume (DBP) of 330-390 ml/100 g and an average particle size of 25-35 nm in an amount of 1.5 to 5.1% by weight - based on total solids.
Inventors
- 👤 Wolfgang Batzill
- 👤 Ulrich Heilmann
- 👤 Hans J. Streitberger
- 👤 Harald Guder
- 👤 Fritz Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:05
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/52; B05D7/54; B05D7/546; C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4457; C09D5/4488; C09D5/4492; B05D1/00; B05D1/007
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
A cathodically depositable aqueous electropaint which contains a cationic amine-modified epoxy resin and is pigmented with electroconductive carbon black and which, on deposition and crosslinking, provides an electrophoretically overcoatable coating, which contains as electroconductive carbon black a carbon black having an iodine absorption of 870-930 mg/g, a specific surface area (BET/N 2 ) of 850-1,000 m 2 /g, a pore volume (DBP) of 330-390 ml/100 g and an average particle size of 25 to 35 nm in an amount of 1.5 to 5.1% by weight--based on total solids.
Claim 2
Dependent Claim
88 words
A cathodically depositable aqueous electropaint which contains a cationic amine-modified epoxy resin and is pigmented with electroconductive carbon black and which, on deposition and crosslinking, provides an electrophoretically overcoatable coating, which contains as electroconductive carbon black a carbon black having an iodine absorption of 870-930 mg/g, a specific surface area (BET/N 2 ) of 850-1,000 m 2 /g, a pore volume (DBP) of 330-390 ml/100 g and an average particle size of 25 to 35 nm in an amount of 1.5 to 5.1% by weight--based on total solids.
Claim 3
Dependent Claim
64 words
An aqueous electropaint as claimed in claim 1, which contains as electroconductive carbon black a carbon black having an iodine absorption of 900 mg/g, a specific surface area (BET/N 2 ) of 950 m 2 /g, a pore volume (DBP) of 360 ml/100 g and an average particle size of 30 mm in an amount of 1.5 to 5.1% by weight--based on total solids.
References Cited (Backward Citations)
US4610811A
Cited
US4575523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |