CN116144244A - Corrosion-resistant aluminum alloy door and window - Google Patents
Corrosion-resistant aluminum alloy door and window Download PDFInfo
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- CN116144244A CN116144244A CN202211670440.9A CN202211670440A CN116144244A CN 116144244 A CN116144244 A CN 116144244A CN 202211670440 A CN202211670440 A CN 202211670440A CN 116144244 A CN116144244 A CN 116144244A
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- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
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- 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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
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- 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
- B05D7/14—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 to metal, e.g. car bodies
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- 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
- B05D7/542—No clear coat specified the two layers being cured or baked together
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention discloses a corrosion-resistant aluminum alloy door and window, which comprises an aluminum alloy door and window substrate layer, wherein the aluminum alloy door and window substrate layer is provided with a curing coating, and the curing coating is obtained by spraying and curing a primer thermosetting powder coating composition and a top thermosetting powder coating composition and then molding; wherein, the primer thermosetting powder coating composition comprises the following raw materials: 30-40wt% of an epoxy resin; 10-30wt% of a primer polyester resin; 20-35wt% zinc powder; 10-25wt% of a primer filler; the top-coat thermosetting powder coating composition comprises the following raw materials: 30-45wt% of a top-coat polyester resin; 30-45wt% of a GMA acrylic resin; 10-40wt% of a top-coat filler; the invention can obtain the cured coating with excellent weather resistance and corrosion resistance, and has excellent adhesive force performance with the aluminum alloy door and window substrate layer.
Description
Technical Field
The invention belongs to the field of aluminum alloy doors and windows, and particularly relates to a corrosion-resistant aluminum alloy door and window.
Background
Aluminum alloys are generally known for use in the field of doors and windows. Since doors and windows need to be exposed to outdoor environments for a long time, aluminum alloys are generally required to have excellent weather resistance.
In order to ensure excellent weather resistance of aluminum alloy doors and windows, people adopt fluorocarbon resin coating with high cost to coat and protect aluminum alloy, and the cost is too high, so the prior art proposes to adopt super weather-resistant resin coating to replace fluorocarbon resin coating, but the prior art has the defect of poor corrosion resistance. Since aluminum alloy doors and windows are often subjected to impacts such as rain, it is desirable that the aluminum alloy doors and windows have good corrosion resistance.
For this reason, the applicant has desired to solve the above-mentioned problems by seeking a technical solution.
Disclosure of Invention
In view of the above, the present invention aims to provide a corrosion-resistant aluminum alloy door and window, which can obtain a cured coating layer having excellent weather resistance and corrosion resistance at the same time, and has excellent adhesion performance with an aluminum alloy door and window substrate layer.
The technical scheme adopted by the invention is as follows:
the corrosion-resistant aluminum alloy door and window comprises an aluminum alloy door and window substrate layer, wherein the aluminum alloy door and window substrate layer is provided with a curing coating, and the curing coating is obtained by spraying and curing a primer thermosetting powder coating composition and a top thermosetting powder coating composition and then molding; wherein, the primer thermosetting powder coating composition comprises the following raw materials:
30-40wt% of an epoxy resin;
10-30wt% of a primer polyester resin;
20-35wt% zinc powder;
10-25wt% of a primer filler;
the top-coat thermosetting powder coating composition comprises the following raw materials:
30-45wt% of a top-coat polyester resin;
30-45wt% of a GMA acrylic resin;
10-40wt% of top-coat filler.
Preferably, the epoxy resin has an epoxy equivalent weight in the range of 700 to 900g/eq.
Preferably, the acid value of the primer polyester resin is in the range of 25 to 60 mgKOH/g, and the viscosity at 200℃is in the range of 1500 to 3000 Pa.s.
Preferably, the basecoat thermosetting powder coating composition further comprises 0.5 to 2 weight percent leveling agent and 0.2 to 1 weight percent deaerating agent.
Preferably, the primer filler comprises mica powder and the topcoat filler comprises nanosilica; wherein the average particle size of the nano silicon dioxide ranges from 30 nm to 60nm.
Preferably, the mica powder accounts for 2-6wt% of the base coat thermosetting powder coating composition, and the nano silicon dioxide accounts for 1-5wt% of the base coat thermosetting powder coating composition.
Preferably, the top coat polyester resin is the same as the bottom coat polyester resin.
Preferably, the GMA acrylic resin has an epoxy equivalent weight in the range of 300-500g/eq.
Preferably, the topcoat thermosetting powder coating composition further comprises a silicone resin in a weight ratio ranging from 5 to 15wt%, the silicone resin being self-crosslinking curable.
Preferably, spraying the primer thermosetting powder coating composition and the top thermosetting powder coating composition on the aluminum alloy door and window substrate layer sequentially through an electrostatic spraying mode, and then obtaining a cured coating through one-step curing and forming; wherein the curing heating temperature is 180-220 ℃ and the heating time is 10-15 minutes; and the cured coating has a thickness in the range of 140-220 microns.
The application provides a primer thermosetting powder coating composition with excellent anti-corrosion effect and a top coating thermosetting powder coating composition with excellent weather-proof effect to prepare a cured coating of an aluminum alloy door and window, meanwhile, the primer thermosetting powder coating composition and the top coating thermosetting powder coating composition have excellent compatibility, and the primer thermosetting powder coating composition and the top coating thermosetting powder coating composition can be respectively sprayed and cured and molded at one time to obtain the cured coating with excellent weather-proof and anti-corrosion performance, and have excellent adhesive force performance with an aluminum alloy door and window substrate layer.
Detailed Description
The embodiment of the invention discloses a corrosion-resistant aluminum alloy door and window, which comprises an aluminum alloy door and window substrate layer, wherein the aluminum alloy door and window substrate layer is provided with a curing coating, and the curing coating is obtained by spraying and curing a primer thermosetting powder coating composition and a top thermosetting powder coating composition and then molding; wherein, the primer thermosetting powder coating composition comprises the following raw materials:
30-40wt% of an epoxy resin;
10-30wt% of a primer polyester resin;
20-35wt% zinc powder;
10-25wt% of a primer filler;
the top-coat thermosetting powder coating composition comprises the following raw materials:
30-45wt% of a top-coat polyester resin;
30-45wt% of a GMA acrylic resin;
10-40wt% of top-coat filler.
Preferably, in order to obtain a good primer coating effect, and zinc powder can be well dispersed in a primer coating system to realize the anti-corrosion effect on a substrate, in the embodiment, the epoxy equivalent weight of the epoxy resin ranges from 700 g/eq to 900g/eq; the acid value of the undercoating polyester resin is in the range of 25-60 mgKOH/g, and the viscosity at 200 ℃ is in the range of 1500-3000 Pa.s.
Preferably, to further facilitate melt flow and dispersion degassing of the primer system, in this embodiment, the primer thermosetting powder coating composition further comprises 0.5 to 2wt% leveling agent and 0.2 to 1wt% degassing agent.
Preferably, to further enhance the corrosion resistance to the substrate, in this embodiment, the primer filler comprises mica powder and the topcoat filler comprises nanosilica; wherein the average particle size of the nano silicon dioxide ranges from 30 nm to 60nm; when the method is applied practically, the mica powder can be compounded and combined with zinc powder in a synergistic way, after the zinc powder is corroded, the mica powder can form a compact corrosion-resistant layer, and meanwhile, the nano silicon dioxide can fill gaps of a base material, so that the whole cured coating has more excellent weather resistance and corrosion resistance. Further preferably, in this embodiment, the mica powder is 2 to 6wt% of the base coat thermosetting powder coating composition and the nano silica is 1 to 5wt% of the base coat thermosetting powder coating composition.
Preferably, in order to ensure efficient compatibility between the basecoat and topcoat systems upon curing, and to ensure adhesion of the coating, in this embodiment the topcoat polyester resin is the same as the basecoat polyester resin.
Preferably, in order to obtain a more excellent weather-resistant effect, in the present embodiment, the GMA acrylic resin has an epoxy equivalent weight in the range of 300 to 500g/eq; the top-coat thermosetting powder coating composition further comprises a silicone resin in an amount ranging from 5 to 15wt% based on the weight of the composition, the silicone resin being capable of self-crosslinking curing.
Preferably, in the present embodiment, a primer thermosetting powder coating composition and a top thermosetting powder coating composition are sequentially sprayed on a substrate layer of an aluminum alloy door and window by means of electrostatic spraying, and then a cured coating is obtained by one-time curing molding; wherein the heating temperature adopted in the curing is 180-220 ℃ and 10-15 minutes; and the cured coating has a thickness in the range of 140-220 microns.
In order to better understand the technical solutions of the present invention, the following description will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Example 1: the corrosion-resistant aluminum alloy door and window comprises an aluminum alloy door and window substrate layer, wherein the aluminum alloy door and window substrate layer is provided with a curing coating, and the curing coating is obtained by spraying and curing a primer thermosetting powder coating composition and a top thermosetting powder coating composition and then molding; wherein, the primer thermosetting powder coating composition consists of the following raw materials:
35wt% of epoxy resin, wherein the epoxy equivalent weight range is 700-900g/eq;25wt% of a primer polyester resin having an acid value in the range of 25 to 60 mgKOH/g and a viscosity in the range of 1500 to 3000mPa.s at 200 ℃;33wt% zinc powder; 5wt% of mica powder; 1wt% of a leveling agent; 1% by weight of degassing agent.
The top-coat thermosetting powder coating composition consists of the following raw materials:
40wt% top coat polyester resin (same type as the bottom coat polyester resin); 40wt% of GMA acrylic resin, wherein the epoxy equivalent weight is 300-500g/eq;3wt% of nanosilica (average particle size in the range 30-60 nm); 17wt% of barium sulfate filler.
Spraying the above-mentioned base coating thermosetting powder coating composition and the above-mentioned thermosetting powder coating composition on the aluminium alloy door and window base material layer in turn by means of electrostatic spraying, and then curing and forming once so as to obtain a cured coating; wherein the curing heating temperature is 220 ℃ and the heating time is 10 minutes; and the cured coating thickness was in the range of 160 microns.
Example 2: the remaining technical solutions of this example 2 are the same as those of example 1, except that the top-coat thermosetting powder coating composition of this example 2 is composed of the following raw materials:
35wt% top coat polyester resin (same type as the bottom coat polyester resin); 35wt% GMA acrylic resin having an epoxy equivalent weight in the range of 300-500g/eq;10wt% silicone resin; 3wt% of nanosilica (average particle size in the range 30-60 nm); 17wt% of barium sulfate filler.
Example 3: the remaining technical solutions of this example 3 are the same as those of example 1, except that the primer thermosetting powder coating composition of this example 3 consists of the following raw materials:
30wt% of epoxy resin, wherein the epoxy equivalent weight range is 700-900g/eq;15wt% of a primer polyester resin having an acid value in the range of 25 to 60 mgKOH/g and a viscosity in the range of 1500 to 3000mPa.s at 200 ℃;33wt% zinc powder; 5wt% of mica powder; 1wt% of a leveling agent; 1wt% of a degassing agent; 15wt% of barium sulphate filler.
Example 4: the remaining technical solutions of this example 4 are the same as those of example 1, except that the primer thermosetting powder coating composition of this example 4 consists of the following raw materials:
35wt% of epoxy resin, wherein the epoxy equivalent weight range is 700-900g/eq;25wt% of a primer polyester resin having an acid value in the range of 25 to 60 mgKOH/g and a viscosity in the range of 1500 to 3000mPa.s at 200 ℃;33wt% zinc powder; 5wt% of barium sulfate filler; 1wt% of a leveling agent; 1% by weight of degassing agent.
Example 5: the remaining technical solutions of this example 5 are the same as those of example 1, except that the top-coat thermosetting powder coating composition of this example 5 is composed of the following raw materials:
40wt% top coat polyester resin (same type as the bottom coat polyester resin); 40wt% of GMA acrylic resin, wherein the epoxy equivalent weight is 300-500g/eq;20wt% of barium sulphate filler.
Comparative example 1: the remaining technical solutions of this comparative example 1 are identical to example 1, except that the primer thermosetting powder coating composition of this comparative example 1 consists of the following raw materials:
40wt% top coat polyester resin (same type as the bottom coat polyester resin); 40wt% of GMA acrylic resin, wherein the epoxy equivalent weight is 300-500g/eq;3wt% of nanosilica (average particle size in the range 30-60 nm); 17wt% of barium sulfate filler.
Comparative example 2: the remaining technical solutions of this comparative example 2 are the same as example 1, except that the top-coat thermosetting powder coating composition of this comparative example 2 consists of the following raw materials:
35wt% of epoxy resin, wherein the epoxy equivalent weight range is 700-900g/eq;25wt% of a primer polyester resin having an acid value in the range of 25 to 60 mgKOH/g and a viscosity in the range of 1500 to 3000mPa.s at 200 ℃;33wt% zinc powder; 5wt% of mica powder; 1wt% of a leveling agent; 1% by weight of degassing agent.
Comparative example 3: the other technical scheme of the comparative example 3 is the same as that of the example 1, except that in the comparative example 3, the above primer thermosetting powder coating composition is sprayed on the aluminum alloy door and window substrate layer by an electrostatic spraying mode, the adopted curing heating temperature is 220 ℃, the heating time is 10 minutes, and the thickness range of the primer curing coating is 60 micrometers; then spraying the thermosetting powder coating composition on the base coat solidified coating through an electrostatic spraying mode, and then obtaining the top coat solidified coating through one-step solidification forming; wherein the curing heating temperature is 220 ℃ and the heating time is 10 minutes; and the top-coat cured coating thickness ranges from 100 microns.
To verify the effect of the present example and comparative example, the present application conducted the relevant performance tests on the cured coatings, respectively, and in particular conducted the performance comparisons shown in the following table 1:
TABLE 1
| Adhesion force | Acid-resistant salt fog for 500 hours | UVB resistance for 1000 hours | Moisture and heat resistance | |
| Test standard | ISO 2409-2020 | GB/T 1771-2007 | ISO4892.3-2006 | BS EN 12721-1997 |
| Example 1 | Level 0 | Single side corrosion width less than 2mm, no rust and no falling off | The light retention rate is more than or equal to 90 percent | Rating by P1 |
| Example 2 | Level 0 | Single side corrosion width less than 2mm, no rust and no falling off | The light retention rate is more than or equal to 90 percent | Rating by P1 |
| Example 3 | Level 0 | Single side corrosion width less than 2mm, no rust and no falling off | The light retention rate is more than or equal to 90 percent | Rating by P1 |
| Example 4 | Level 0 | Single side corrosion width is less than 5mm, and a small amount of rust is generated | The light retention rate is 75-80% | Rating by P1 |
| Example 5 | Level 0 | Single side corrosion width is less than 5mm, and a small amount of rust is generated | The light retention rate is 75-80% | Rating by P1 |
| Comparative example 1 | Level 0 | Coating film falls off and rust | Light retention<40% | Failure to rate by P1 |
| Comparative example 2 | Level 0 | Coating film falls off and rust | Light retention<70% | Failure to rate by P1 |
| Comparative example 3 | Level 2 | Coating film falls off and rust | Light retention<70% | Failure to rate by P1 |
As is clear from table 1 above, the present example can provide a cured coating having both excellent weather resistance and corrosion resistance, and has very excellent adhesion performance with an aluminum alloy door and window substrate layer.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The corrosion-resistant aluminum alloy door and window comprises an aluminum alloy door and window substrate layer, and is characterized in that the aluminum alloy door and window substrate layer is provided with a curing coating, and the curing coating is obtained by spraying and curing a primer thermosetting powder coating composition and a top thermosetting powder coating composition and then forming; wherein, the primer thermosetting powder coating composition comprises the following raw materials:
30-40wt% of an epoxy resin;
10-30wt% of a primer polyester resin;
20-35wt% zinc powder;
10-25wt% of a primer filler;
the top-coat thermosetting powder coating composition comprises the following raw materials:
30-45wt% of a top-coat polyester resin;
30-45wt% of a GMA acrylic resin;
10-40wt% of top-coat filler.
2. The corrosion resistant aluminum alloy door and window of claim 1, wherein the epoxy resin has an epoxy equivalent weight in the range of 700-900g/eq.
3. The corrosion resistant aluminum alloy door and window according to claim 1, wherein the acid value of the primer polyester resin ranges from 25 to 60 mgKOH/g and the viscosity at 200 ℃ ranges from 1500 to 3000mpa.s.
4. The corrosion resistant aluminum alloy door and window of claim 1 wherein said basecoat thermosetting powder coating composition further comprises 0.5 to 2 weight percent leveling agent and 0.2 to 1 weight percent degassing agent.
5. The corrosion resistant aluminum alloy door and window of claim 1, wherein the primer filler comprises mica powder and the topcoat filler comprises nano-silica; wherein the average particle size of the nano silicon dioxide ranges from 30 nm to 60nm.
6. The corrosion resistant aluminum alloy door and window of claim 1, wherein the mica powder is present in an amount of 2 to 6 weight percent of the primer thermosetting powder coating composition and the nanosilica is present in an amount of 1 to 5 weight percent of the primer thermosetting powder coating composition.
7. The corrosion resistant aluminum alloy door and window of claim 1, wherein said top coat polyester resin is the same as said bottom coat polyester resin.
8. The corrosion resistant aluminum alloy door and window of claim 1, wherein the GMA acrylic resin has an epoxy equivalent weight in the range of 300-500g/eq.
9. The corrosion resistant aluminum alloy door and window of claim 1 wherein said topcoat thermosetting powder coating composition further comprises a silicone resin in the range of 5 to 15 weight percent thereof, said silicone resin being self-crosslinking curable.
10. The corrosion-resistant aluminum alloy door and window according to claim 1, wherein the base-coating thermosetting powder coating composition and the top-coating thermosetting powder coating composition are sprayed on the aluminum alloy door and window substrate layer sequentially through an electrostatic spraying mode, and then a cured coating is obtained through one-time curing molding; wherein the curing heating temperature is 180-220 ℃ and the heating time is 10-15 minutes; and the cured coating has a thickness in the range of 140-220 microns.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211670440.9A CN116144244A (en) | 2022-12-26 | 2022-12-26 | Corrosion-resistant aluminum alloy door and window |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211670440.9A CN116144244A (en) | 2022-12-26 | 2022-12-26 | Corrosion-resistant aluminum alloy door and window |
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| CN116144244A true CN116144244A (en) | 2023-05-23 |
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| CN112745741A (en) * | 2020-12-29 | 2021-05-04 | 老虎表面技术新材料（苏州）有限公司 | Bottom-coating anti-corrosion powder coating for coating base material, base material capable of avoiding chemical pretreatment and coating system |
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2022
- 2022-12-26 CN CN202211670440.9A patent/CN116144244A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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