US5047451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding corrosion inhibiting coating
Assignee: Depor Industries Inc
•
Filing: 1988-11-28
•
Granted: 1991-09-10
•
Expires: 2008-11-28
Abstract
Abstract A corrosive resistant coating composition with improved weldability characteristics which is applied to a metal substrate as a wet film and then heated to dry and initiate curing to provide a protective coating tenaciously bonded to the substrate. The composition has corrosion inhibiting finely divided aluminum or stainless steel, a weldability agent of finely divided nickel, a primary bonding resin, and a vehicle of solvents. Preferably, the composition also has a secondary organic resin and thixotropic, metal suspension and hydroscopic agents.
Inventors
- 👤 L. Donald Barrett
- 👤 Dale R. Hahn
- 👤 Peter E. Pelloski
- 👤 Richard W. Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:44
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/10; B; B23; B23K; B23K35/00; B23K35/22; B23K35/226
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
281 words
A corrosion resistant liquid coating composition for application to and curing on a steel substrate to a dry film and being electric resistance weldable after curing, comprising: a finely divided metal selected from the group consisting of aluminum, stainless steel and alloys and blends thereof, and having an average particle size not greater than about 60 microns and a maximum individual particle size not greater than about 100 microns; a resin system at least 50% by weight consisting essentially of primary bonding resin; a weldability agent consisting essentially of a quantity of finely divided nickel equal to at least 15% by weight of all solids of the composition; the quantity of said resin system being about 10% to 525% by weight of said finely divided metal and nickel; a vehicle comprising an active organic solvent compatible with said resin system and dissolving said primary bonding resin into a liquid solution, and said vehicle being of sufficient total quantity for the composition to have a viscosity in the range of 20 to 280 seconds in a Ford No. 4 cup, said coating composition having essentially no zinc therein, said finely divided metal and nickel being suspended and disbursed in said liquid resin and said resin system being curable to a dry film tenaciously adhered to a steel substrate with said finely divided metal an nickel dispersed therein by heating a thin wet film of said coating composition to a temperature not greater than about 500° F. to provide such a dry film coating which is electric resistance weldable after curing and protects the metal substrate, form corrosion after being welded and is highly resistant to petrol chemicals and a neutral salt spray.
Claim 2
Dependent Claim
281 words
A corrosion resistant liquid coating composition for application to and curing on a steel substrate to a dry film and being electric resistance weldable after curing, comprising: a finely divided metal selected from the group consisting of aluminum, stainless steel and alloys and blends thereof, and having an average particle size not greater than about 60 microns and a maximum individual particle size not greater than about 100 microns; a resin system at least 50% by weight consisting essentially of primary bonding resin; a weldability agent consisting essentially of a quantity of finely divided nickel equal to at least 15% by weight of all solids of the composition; the quantity of said resin system being about 10% to 525% by weight of said finely divided metal and nickel; a vehicle comprising an active organic solvent compatible with said resin system and dissolving said primary bonding resin into a liquid solution, and said vehicle being of sufficient total quantity for the composition to have a viscosity in the range of 20 to 280 seconds in a Ford No. 4 cup, said coating composition having essentially no zinc therein, said finely divided metal and nickel being suspended and disbursed in said liquid resin and said resin system being curable to a dry film tenaciously adhered to a steel substrate with said finely divided metal an nickel dispersed therein by heating a thin wet film of said coating composition to a temperature not greater than about 500° F. to provide such a dry film coating which is electric resistance weldable after curing and protects the metal substrate, form corrosion after being welded and is highly resistant to petrol chemicals and a neutral salt spray.
Claim 3
Dependent Claim
49 words
The coating composition of claim 1 which also comprises a quantity of a secondary resin equal to about 1% to 50% by weight of said primary bonding resin, said secondary resin comprising at least one of the resins of phenolic, triazine, amino, urea-formaldehyde, titanates, ketimines, hexo-methoxymethyl-melamine or benzoguanamine resins.
Claim 4
Dependent Claim
48 words
The coating composition of claim 1 which also comprises a quantity of a secondary resin equal to about 5% to 30% by weight of said primary bonding resin, said secondary resin consisting essentially of at least one of phenolic, triazine, amino, urea-formaldehyde, titanates, ketimines, hexo-methoxymethyl-melamine or benzoguanamine resins.
Claim 5
Dependent Claim
30 words
The coating composition of claim 1 wherein said primary bonding resin comprises at least one of the resins of the family of epoxy, phenoxy, polyvinylidene chloride, polyester, isocyanate or acrylic.
Claim 6
Dependent Claim
28 words
The coating composition of claim 1 wherein said primary bonding resin is selected from the group consisting of resins of epoxy, phenoxy, polyvinylidene chloride, polyester, isocyanate and acrylic.
Claim 7
Dependent Claim
29 words
The coating composition of claim 1 which also comprises a quantity of thixotropic agent equal to about 0.4% to 12% by weight of said finely divided metal and nickel.
Claim 8
Dependent Claim
30 words
The coating composition of claim 1 which also comprises a quantity of a suspension agent equal to about 0.2% to 5% by weight of said finely divided metal and nickel.
Claim 9
Dependent Claim
28 words
The coating composition of claim 1 which also comprises a quantity of a hygroscopic agent equal to about 0.2% to 12% by weight of said finely divided metal.
Claim 10
Dependent Claim
34 words
The coating composition of claim 1 which also comprises a drawable polymeric component consisting essentially of a quantity of polytetrafluorethylene equal to at least 1% by weight of the total solids of the composition.
Claim 11
Dependent Claim
32 words
The coating composition of claim 1 wherein said active solvent is acetone, cellosolve acetate, methyl ethyl ketone, methyl isobutyl ketone, dimethyl-formamide, xylene, toluene, dibasic ester, naphtha, propylene glycol acetate or blends thereof.
Claim 12
Dependent Claim
40 words
The coating composition of claim 1 which also comprises an inactive organic solvent selected from a group comprising aromatic hydrocarbons, alcohols or blends thereof in a quantity equal to about 10% to 40% by weight of the active organic solvents.
Claim 13
Dependent Claim
26 words
The coating composition of claim 1 wherein said organic solvents comprise a quantity equal to about 20% to 300% by weight of all of said resins.
Claim 14
Dependent Claim
26 words
The coating composition of claim 1 wherein said weldable nickel is in a form comprising at least one selected from the group of flakes or granules.
Claim 15
Dependent Claim
17 words
The coating composition of claim 1 wherein said weldable nickel is essentially in the form of granules.
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) | 1994-09-09 | 1995-03-11 | 1995-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-09 | 1999-03-11 | 1999-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-09 | 2003-03-11 | 2003-09-10 | $7700.00 | Window Closed / Lapsed |