US3976613A
Expired / Lapsed
US
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Composition and process for treating and repairing metallic and non-metallic surfaces
Assignee: DURWELD Corp NV CURACAO NETHERLANDS-ANTILLES A NETHERLANDS-ANTILLES CORP
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Filing: 1975-03-28
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Granted: 1976-08-24
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Expires: 1995-03-28
Abstract
Abstract A hardenable, liquid film forming composition capable of being applied as a uniform coating and hardening to a smooth tough and adherent coating on metal and non-metal substrates. The hardened coating possesses good mechanical properties and solvent and acid resistant properties. The composition comprises: A. a liquid epoxy resin having terminable epoxy groups and an epoxy equivalent from about 185 to 210; B. a filler material in an amount between about 20 and 50 weight percent of said epoxy; C. an effective amount of a dispersing agent for said filler material; and D. a hardening additive for said epoxy resin of the structural formula: ##SPC1## Wherein n has a value of at least 2.
Inventors
- 👤 Rainer Schinabeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:31
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/623
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
105 words
A hardenable, liquid film forming composition that is capable of being applied as a uniform coating and hardening to a smooth, tough and adherent coating and possessing good mechanical and solvent resistant properties comprising: A. a liquid epoxy resin having terminable epoxy groups and an epoxy equivalent from about 185 to 210; B. a filler material in an amount between about 20 and 50 weight percent of said epoxy resin; C. an effective amount of a dispersing agent for said filler material; and D. a hardening additive for said epoxy resin of the structural formula: ##SPC4## wherein n has a value of at least 2.
Claim 2
Dependent Claim
105 words
A hardenable, liquid film forming composition that is capable of being applied as a uniform coating and hardening to a smooth, tough and adherent coating and possessing good mechanical and solvent resistant properties comprising: A. a liquid epoxy resin having terminable epoxy groups and an epoxy equivalent from about 185 to 210; B. a filler material in an amount between about 20 and 50 weight percent of said epoxy resin; C. an effective amount of a dispersing agent for said filler material; and D. a hardening additive for said epoxy resin of the structural formula: ##SPC4## wherein n has a value of at least 2.
Claim 3
Dependent Claim
27 words
The composition of claim 1, wherein said filler material is selected from the group consisting of stainless steel flakes, steel powder, titaniferrous magnetite oxide or mixtures thereof.
Claim 4
Dependent Claim
18 words
The composition of claim 2, wherein said filler material has a particle size up to about 50 microns.
Claim 5
Dependent Claim
28 words
The composition of claim 1, wherein said dispersing agent is fumed silica and is present in an amount between 5 and 20 weight percent of said epoxy resin.
Claim 6
Dependent Claim
14 words
The composition of claim 1, wherein n has a value from 2 to 5.
Claim 7
Dependent Claim
22 words
The composition of claim 1 further comprising silicic acid in an amount between 1 and 7 weight percent of said epoxy resin.
Claim 8
Dependent Claim
22 words
The composition of claim 1, further comprising between about 1 and 2 ounces of silicon oil per 120 pounds of said composition.
Claim 9
Dependent Claim
97 words
The composition of claim 1, wherein said liquid epoxy resin has an approximate molecular weight of about 380 and a viscosity of below about 900 c.p.s at 25°C; said filler material is steel powder and is present in an amount of about 33 weight percent of said epoxy resin; and dispersing agent is fumed silica; said dispersing agent being present in an amount of about 10 weight percent of said epoxy resin; said hardening additive is present in an amount of about 35 weight percent based on the weight of said epoxy resin, and n = 2.
Claim 10
Dependent Claim
22 words
The composition of claim 8, further comprising silicic acid in an amount between 1 and 7 weight percent of said epoxy resin.
Claim 11
Dependent Claim
22 words
The composition of claim 8, further comprising between about 1 and 2 ounces of silicon oil per 120 pounds of said composition.
Claim 12
Dependent Claim
18 words
A cured composition comprising the reaction product of said epoxy resin and said hardening additive of claim 1.
Claim 13
Dependent Claim
18 words
A cured composition comprising the reaction product of said epoxy resin and said hardening additive of claim 8.
Claim 14
Dependent Claim
38 words
A method for forming a corrosion-resistant coating on a metal surface while the surface is immersed in water which comprises applying to said surface the composition of claim 1, and allowing said mixture to harden under said water.
Claim 15
Dependent Claim
16 words
The method of claim 13, wherein said filler material is steel powder and n = 2.
Claim 16
Dependent Claim
46 words
A method for repairing a defect in a metal or non-metal surface which comprises applying to said surface the composition of claim 1, and then allowing said composition to harden to form a smooth, tough and adherent coating and possessing good mechanical and solvent resistant properties.
Claim 17
Dependent Claim
16 words
The method of claim 15, wherein said filler material is steel powder and n = 2.
References Cited (Backward Citations)
US3850661A
Cited
US3852240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |