GB2369790A - Method of protecting a surface - Google Patents
Method of protecting a surface Download PDFInfo
- Publication number
- GB2369790A GB2369790A GB0029930A GB0029930A GB2369790A GB 2369790 A GB2369790 A GB 2369790A GB 0029930 A GB0029930 A GB 0029930A GB 0029930 A GB0029930 A GB 0029930A GB 2369790 A GB2369790 A GB 2369790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- protecting
- layer
- resin blend
- polyester resin
- curing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A method of protecting a surface including the steps of applying a first curable material to the surface, partially curing the layer, applying a second curable material to the partially cured layer, and then subjecting the layers to full curing to form an integrated layer. The first curable material may be an epoxy resin blend, and the second curable material a polyester resin blend. The epoxy resin blend may comprise epichlorohydrin (bisphenol A), amine condensate curing agents, mineral extenders, zinc and various additives. The polyester blend may comprise a saturated carboxylated polyester resin, a TGIC curing agent, mineral extenders, pigments, and various additives.
Description
A METHOD OF PROTECTING A SURFACE The present invention relates to a method of protecting a surface, particularly but not exclusively the protection of metal surfaces which have been subjected to a high performance metal surface preparation.
In order to protect such high performance metal surfaces, the surfaces are coated. However, the coating itself may be subject to wear leading eventually to damage to the prepared high performance metal surface. An object of the invention is to overcome or mitigate this disadvantage.
According to the present invention there is provided a method of protecting a surface including the steps of applying a first layer of a first curable material to the surface, partially curing the layer, applying a second layer of a second curable material to the partially cured layer, and curing the superposed layers to form a integrated layer.
In a preferred embodiment of the invention, the first layer comprises an epoxy resin. Advantageously, this is specifically blended for the purpose comprising, for example, bisphenol A (epichlorohydrin), amine condensate curing agents, mineral extenders, zinc and various additives. Similarly, the curable material of the second layer is also advantageously specifically
blended comprising, for example, saturated carboxylate polyester resin, TGIC curing agent, mineral extenders, pigments and various additives. The first layer may be partially cured by rapid heading to 120 C for between
two and six minutes before application of the second layer. After application of the second layer, the superposed layers are advantageously fully cured together at a temperature of between 200 and 2400C for a period of between fifteen and twenty-five minutes to produce a completely integrated layer which combines the corrosion resistance of the epoxy first layer with the weather resistance of the polyester layer. The partial curing of the first layer enables thorough cross linking with the material of the second layer to produce the integrated combined layer during the further curing. The method is suitable for metals generally and is particularly suitable for carbon steel, and aluminium and zinc coated steels.
In order that the invention may be more fully understood, one embodiment of the invention will now be described, by way of example.
In this embodiment the surface to be coated is subjected to a high performance surface preparation in a conventional manner. A specifically formulated epoxy blend of bisphenol A (epichlorohydrin), amine condensate curing agents, mineral extenders, zinc and various additives is applied as a first layer to the prepared surface. This epoxy blend layer is then subject to a partial intermediate curing by rapidly heating the layer up to 120oC and maintaining this temperature for a period of two to six minutes. A second layer comprising a polyester resin is then applied to the first layer. The polyester resin is a blend of saturated carboxylate polyester resin, TGIC/PYRAMID/OTHER curing agent, mineral extenders, pigments and
various additives. The superposed layers are then subjected to a further curing by heating the layers to a temperature of between 200 to 240C and maintaining that temperature for a period of between fifteen and twenty five minutes to form a single integrated layer which combines the corrosion resistance of the epoxy layer with the weather resistance of the polyester.
The partial curing of the first layer promotes a thorough cross linking between the materials of the two layers to facilitate the homogenous layer formation in the final curing step.
The method may be used on any suitable substrate and is particularly suitable for the coating of carbon steel, and aluminium and zinc coated steels.
It will be appreciated that the above embodiment has been described by way of example only and that many variations are possible without departing from the scope of the invention.
Claims (17)
1. A method of protecting a surface including the steps of applying a first layer of a first curable material to the surface, partially curing the layer, applying a second layer of a second curable material to the partially cured layer, and curing the superposed layers to form a integrated layer.
2. A method of protecting a surface as claimed in claim 1, in which the first layer comprises an epoxy resin blend.
3. A method of protecting a surface as claimed in claim 2, in which the epoxy resin blend comprises epichlorhydrin (bisphenol A).
4. A method of protecting a surface as claimed in claim 2 or 3, in which the epoxy resin blend includes amine condensate curing agents.
5. A method of protecting a surface as claimed in claim 2,3 or 4, in which the epoxy resin blend includes mineral extenders.
6. A method of protecting a surface as claimed in any of claims 2 to 5, in which the epoxy resin blend includes zinc and various additives.
7. A method of protecting a surface as claimed in any preceding claim, in which the first layer is partially cured by heating up to a temperature of 120oC.
8. A method of protecting a surface as claimed in any preceding claim, in which the partial curing comprises maintaining the first layer at a raised temperature for between two and six minutes.
9. A method of protecting a surface as claimed in any preceding claim, in which the second layer comprises a polyester resin blend.
10. A method of protecting a surface as claimed in claim 9, in which the polyester resin blend comprises saturated carboxylate polyester resin.
11. A method of protecting a surface as claimed in claim 9 or 10, in which the polyester resin blend comprises TGIC curing agent.
12. A method of protecting a surface as claimed in claim 9,10 or 11, in which the polyester resin blend comprises mineral extenders.
13. A method of protecting a surface as claimed in claim 9, 10, 11 or 12, in which the polyester resin blend comprises pigments.
14. A method of protecting a surface as claimed in claim 9,10, 11,12 or 13, in which the polyester resin blend comprises various additives.
15. A method of protecting a surface as claimed in any preceding claim, in which the superposed layers are cured by heating to a temperature of between 200 and 240oC.
16. A method of protecting a surface as claimed in any preceding claim, in which the superposed layers are cured by maintaining the layers at a raised temperature for between fifteen and twenty five minutes.
17. A protected surface protected by the method as claimed in any preceding claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0029930A GB2369790A (en) | 2000-12-08 | 2000-12-08 | Method of protecting a surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0029930A GB2369790A (en) | 2000-12-08 | 2000-12-08 | Method of protecting a surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0029930D0 GB0029930D0 (en) | 2001-01-24 |
| GB2369790A true GB2369790A (en) | 2002-06-12 |
Family
ID=9904678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0029930A Withdrawn GB2369790A (en) | 2000-12-08 | 2000-12-08 | Method of protecting a surface |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2369790A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3877970A (en) * | 1973-09-26 | 1975-04-15 | Phillips Petroleum Co | Selective curing of multiple layers of polyarylene sulfide coatings |
| US3911178A (en) * | 1974-02-19 | 1975-10-07 | Mccord Corp | Painting of a molded urethane part |
| GB1558464A (en) * | 1975-07-29 | 1980-01-03 | Metal Box Co Ltd | Method and apparatus for providing flame cured coatings |
| EP0525867A1 (en) * | 1991-07-26 | 1993-02-03 | Akzo Nobel N.V. | Two-layer coating systems for wheels and architectural applications |
| US5334631A (en) * | 1991-07-22 | 1994-08-02 | Akzo N.V. | Powder coating composition containing a resin, a curing agent and zinc |
-
2000
- 2000-12-08 GB GB0029930A patent/GB2369790A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3877970A (en) * | 1973-09-26 | 1975-04-15 | Phillips Petroleum Co | Selective curing of multiple layers of polyarylene sulfide coatings |
| US3911178A (en) * | 1974-02-19 | 1975-10-07 | Mccord Corp | Painting of a molded urethane part |
| GB1558464A (en) * | 1975-07-29 | 1980-01-03 | Metal Box Co Ltd | Method and apparatus for providing flame cured coatings |
| US5334631A (en) * | 1991-07-22 | 1994-08-02 | Akzo N.V. | Powder coating composition containing a resin, a curing agent and zinc |
| EP0525867A1 (en) * | 1991-07-26 | 1993-02-03 | Akzo Nobel N.V. | Two-layer coating systems for wheels and architectural applications |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0029930D0 (en) | 2001-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |