CN108192433B - Modified fluorocarbon powder coating for aluminum surface and preparation method thereof - Google Patents
Modified fluorocarbon powder coating for aluminum surface and preparation method thereof Download PDFInfo
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- 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
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- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- 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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Abstract
The invention discloses a modified fluorocarbon powder coating for an aluminum surface and a preparation method thereof, wherein two curing systems of fluorocarbon and acrylic resin are respectively used as base materials, and materials such as a leveling agent, a toughening agent, a dispersing agent, a coupling agent, an inorganic ceramic pigment and the like are matched to prepare a single-component powder coating, and then the powder of the two components is subjected to a new thermal bonding and mixing process according to the weight ratio of 1: 9-9: 1 to prepare the modified fluorocarbon powder coating. The preparation method adopted by the invention is green, environment-friendly, safe and low in cost, and can obviously increase the content of the fluorocarbon system migrating to the surface of the coating, thereby giving full play to the advantages of the fluorocarbon system. Therefore, the modified fluorocarbon powder coating disclosed by the invention not only maintains the excellent weather resistance and chemical corrosion resistance of the fluorocarbon coating, but also can enhance the adhesive force of a coating film and improve the storage stability of the powder, and the decorative effect of the powder coating is not influenced, so that the comprehensive cost is relatively low.
Description
Technical Field
The invention belongs to the field of powder coatings, and particularly relates to a modified fluorocarbon powder coating for an aluminum surface and a preparation method thereof.
Background
Most fluorocarbon coatings in the market belong to solvent-based coatings, a large amount of volatile organic compounds are discharged in the production and coating processes of the fluorocarbon coatings, and along with the gradual improvement of environmental protection laws and regulations, the environmental protection requirements of the fluorocarbon coatings are more and more strict, the fact that the VOC discharge amount of the fluorocarbon coatings is reduced as much as possible in the production and coating processes of the fluorocarbon coatings is very important, but the fluorocarbon coatings have VOC discharge in different degrees no matter how the fluorocarbon coatings are improved as solvent-based fluorocarbon coatings. The powder coating is used as a green environment-friendly coating without VOC, in particular to a thermosetting fluorocarbon powder coating, and the production, manufacturing and coating processes of the powder coating are basically similar to those of common powder coatings, so the powder coating gradually becomes one of the preferential development directions of the coating industry.
The thermosetting pure fluorocarbon powder coating has extremely excellent weather resistance, and can be applied outdoors for 20-30 years. However, the current domestic technology is not mature, and the popularization and application of the thermosetting pure fluorocarbon powder coating on the market are slow due to the aspects of adhesion, impact resistance, pigment and filler dispersibility and the like and high material cost.
Disclosure of Invention
The invention aims to overcome the problems of poor adhesion, poor impact resistance, poor pigment and filler dispersibility and the like of the existing thermosetting fluorocarbon powder coating, and provides a modified fluorocarbon powder coating for an aluminum surface, which has excellent weather resistance, outstanding chemical corrosion resistance, good adhesion, good impact resistance and other mechanical properties and does not influence the decoration property, and a preparation method thereof.
The adhesive is prepared from A, B components in a weight ratio of 1: 9-9: 1 through a thermal bonding mixing process, wherein the component A comprises the following raw materials in percentage by weight:
the sum of the weight percentages of the components is 100 percent;
the component B comprises the following raw materials in percentage by weight:
the sum of the weight percentages of the components is 100 percent.
Preferably, the thermosetting fluorocarbon resin comprises a copolymer of one of alkyl vinyl ether such as cyclohexyl vinyl ether, hydroxybutyl vinyl ether, ethyl vinyl ether and glycidyl vinyl ether or one of alkyl vinyl ester such as vinyl acetate, vinyl caproate, vinyl pivalate, vinyl neononanoate and vinyl neodecanoate with fluoroolefin.
Preferably, the fluoroolefin comprises chlorotrifluoroethylene or tetrafluoroethylene.
Preferably, the isocyanate curing agent comprises one of blocked trimethylolpropane diisocyanate adduct, blocked isophorone diisocyanate trimer, hexamethylene diisocyanate adduct and diethyl ketone diisocyanate adduct; the coupling agent comprises one or more of titanate coupling agent, zirconate coupling agent, aluminate coupling agent, bimetallic coupling agent and rare earth coupling agent.
Preferably, the inorganic ceramic pigment comprises one or more of cobalt blue, cobalt green, cobalt black, copper chromium black, titanium nickel yellow and cadmium tanning.
Preferably, the acrylic resin is a thermosetting resin or a thermoplastic resin; wherein the thermosetting resin comprises one or more of epoxy acrylic acid, hydroxy acrylic acid and carboxyl acrylic resin.
Preferably, in the polycarboxylic acid or the polybasic acid anhydride, the polycarboxylic acid comprises one or more of adipic acid, dodecanedioic acid, tetradecanedioic acid and octadecanedioic acid.
In addition, the invention also provides a preparation method of the modified fluorocarbon powder coating for the aluminum surface, which comprises the following steps:
(1) premixing raw materials of the A, B component formula according to the corresponding weight percentage respectively;
(2) respectively melting and mixing the raw materials of the A, B components after premixing;
(3) tabletting the extruded A, B component material, and respectively crushing and finely crushing after cooling;
(4) respectively carrying out classification screening on the A, B component powder after the fine crushing;
(5) and (3) carrying out a thermal bonding mixing process on the A, B component powder subjected to classified screening according to the weight ratio of 1: 9-9: 1 to obtain the modified fluorocarbon powder coating.
Preferably, the thermal bonding mixing process in the step (5) comprises the steps of adding A, B component powder into a mixing device according to the weight percentage, adjusting the temperature to the bonding temperature, preserving the temperature for 3-10 minutes, mixing and stirring, cooling and packaging to obtain the modified fluorocarbon powder coating; the weight percentage of the bonding temperature to the added powder coating and the glass transition temperature TgIt is related.
Preferably, the mixing device comprises a batch mixer, a ball mill or a high speed mixer.
Compared with the prior art, the design principle and the main advantages of the modified fluorocarbon powder coating for the aluminum surface are as follows:
(1) the modified fluorocarbon powder coating is prepared by the following steps according to compatible thermodynamics of a blend and a polymer self-layering technology: the coating material utilizes differences in surface tension or other physical properties between different binders during film formation to produce a change in binder concentration from the surface of the coating to the interface of the phases. Namely polymer T according to the compatibility between two systems of fluorocarbon powder coating and acrylic powder coating, the melt surface tension and the relative molecular massgAnd the like, so that the fluorocarbon powder coating system in a molten state is more prone to migrate to the surface of the coating and gather on the surface in contact with air, and a very excellent weather-resistant effect is achieved.
(2) The new process of thermal bonding and mixing of A, B components used in the invention is different from the process of co-extruding A, B raw materials to prepare powder and is further different from the conventional process of dry mixing A, B component powder, so that not only can two different powder systems of fluorocarbon and acrylic acid be fully and uniformly mixed, but also certain bonding force can be provided between the two powder systems, and the spraying stability of the recovered powder can be enhanced; most importantly, compared with the other two conventional processes, the hot bonding mixing process can obviously improve the adhesion and the aging resistance of the coating, and can also greatly reduce the cost.
(3) The silane modified metal oxide adopted by the invention is used as a dispersing agent of a powder coating formula, so that on one hand, powder particles can be protected from agglomeration, the probability of powder adhesion caused by van der Waals force, moisture absorption, static electricity or particle friction and the like is reduced, and the storage stability of the powder coating is improved; on the other hand, due to the reasons of large specific surface area, high activity and the like, the coating is easy to generate bonding action with the oxophilic group in the system, and the intermolecular bonding force is improved, so that the flexibility of the coating is improved.
(4) The coupling agent adopted by the invention can obviously improve the interface action of organic matters (such as resin, auxiliary agents and the like) on inorganic matters (such as fillers, pigments and the like) and increase the bonding strength among various materials, namely, the mechanical property and the appearance of a coating can be improved, wherein the influence of the coupling agent on a powder system containing a pigment with large oil absorption is particularly obvious.
(5) The inorganic ceramic pigment adopted by the invention has higher levels of weather resistance, light resistance and heat resistance than the common inorganic pigment, and for fluorocarbon powder coating with extremely strong weather resistance, the weather resistance and the light resistance of the used pigment must be the highest, otherwise, the weather resistance of the coating is influenced. Meanwhile, the invention uses the coupling agent, so that the use of the inorganic ceramic pigment does not affect the mechanical property and appearance of the coating.
(6) The modified fluorocarbon powder coating disclosed by the invention takes a fluorocarbon resin and acrylic resin dual-curing system as a base material, overcomes the problems of poor adhesion, poor impact resistance, poor pigment and filler dispersibility and the like of thermosetting fluorocarbon powder on the basis of keeping the super-strong weather resistance of the fluorocarbon system, improves the storage stability of the powder, has relatively low comprehensive cost, and is more easily accepted by users on the basis of meeting customer requirements.
(7) The invention is suitable for the production of the existing powder coating production equipment and has strong operability.
Drawings
FIG. 1 is a flow chart of the preparation method of the modified fluorocarbon powder coating for aluminum surface of the present invention.
Detailed Description
The invention is described in further detail below with reference to fig. 1 and examples, but the embodiments of the invention are not limited thereto. The process is conventional unless otherwise specified, and the starting materials are commercially available from published sources. The following examples are all in parts by mass.
The modified fluorocarbon powder coating for the aluminum surface is characterized by comprising the following components in parts by weight: the adhesive is prepared by A, B components according to the weight ratio of 1: 9-9: 1 through a thermal bonding mixing process,
the component A comprises the following raw materials in percentage by weight:
the sum of the weight percentages of the components is 100 percent;
the component B comprises the following raw materials in percentage by weight:
the sum of the weight percentages of the components is 100 percent.
The thermosetting fluorocarbon resin comprises a copolymer of one of alkyl vinyl ether such as cyclohexyl vinyl ether, hydroxybutyl vinyl ether, ethyl vinyl ether and glycidyl vinyl ether or one of alkyl vinyl ester such as vinyl acetate, vinyl caproate, vinyl pivalate, vinyl neononanoate and vinyl neodecanoate and fluoroolefin. The thermosetting fluorocarbon resin is preferably copolymer of alkyl vinyl ether and chlorotrifluoroethylene, and comprises one or more of polymer of Lumiflon series and SRF series, wherein the hydroxyl value of the Lumiflon series polymer is 50 +/-5 mgKOH/g, and the glass transition temperature of the Lumiflon series polymer is 50-54 ℃.
The fluoroolefin comprises chlorotrifluoroethylene or tetrafluoroethylene.
The isocyanate curing agent comprises one of blocked trimethylolpropane diisocyanate adduct, blocked isophorone diisocyanate trimer, hexamethylene diisocyanate adduct and diethyl ketone diisocyanate adduct, and is preferably caprolactam blocked isophorone diisocyanate, and the NCO content of the isocyanate curing agent is 14.8-15.7%.
The coupling agent comprises one or more of titanate coupling agent, zirconate coupling agent, aluminate coupling agent, bimetallic coupling agent, rare earth coupling agent and the like, the coupling agent is preferably silane coupling agent, wherein the non-hydrolytic group is preferably one or more of amino, isocyanate and epoxy, and the particle size of the coupling agent is generally 15-25 mu m.
The dispersing agent is silane modified metal oxide, and the specific surface area is 120-140 m2(ii)/g, the mass loss is 0.5 to 2.0% when the mixture is heated to 105 ℃.
The filler comprises magnesium silicate such as talcum powder, meta-aluminate such as kaolin, mica powder and the like, and the filler is preferably inorganic sulfate such as barite or carbonate such as calcium carbonate and the like;
the inorganic ceramic pigment is a non-ferrous metal oxide or an insoluble metal salt which is subjected to calcination at different temperatures, such as 600-1300 ℃, and has high stability, such as light resistance of grade 8 and weather resistance of grade 5.
The inorganic ceramic pigment comprises one or more of cobalt blue, cobalt green, cobalt black, copper chromium black, titanium nickel yellow and cadmium tanning.
The toughening agent is an acrylate modified polymer coated by rubber silicon, preferably contains one or more of hydroxyl, carboxyl and amino and has a small oil absorption and a particle size of 0.5-5.0 mu m.
The other auxiliary agents comprise one or more of degasifier, antioxidant, anti-scratching agent, curing accelerator, anti-yellowing agent, charge enhancer, antistatic agent, light stabilizer, ultraviolet absorbent, antibacterial agent, flow flatting agent, gloss improvement additive and anti-blocking agent. The degassing agent is preferably benzoin; the curing accelerator is preferably dibutyl tin laurate or stannous octoate. The other adjuvants may significantly improve certain properties of the powder or coating.
The acrylic resin is thermosetting resin or thermoplastic resin; wherein the thermosetting resin comprises one or more of epoxy acrylic acid, hydroxy acrylic acid and carboxyl acrylic resin.
In the polycarboxylic acid or the polybasic acid anhydride, the polycarboxylic acid comprises one or more of adipic acid, dodecanedioic acid, tetradecanedioic acid and octadecanedioic acid.
The preparation method of the modified fluorocarbon powder coating for the aluminum surface has the flow shown in the attached figure 1, and comprises the following steps:
(1) premixing raw materials of the A, B component formula according to the corresponding weight percentage respectively;
(2) respectively melting and mixing the raw materials of the A, B components after premixing;
(3) tabletting the extruded A, B component material, and respectively crushing and finely crushing after cooling;
(4) respectively carrying out classification screening on the A, B component powder after the fine crushing;
(5) and (3) carrying out a thermal bonding mixing process on the A, B component powder subjected to classified screening according to the weight ratio of 1: 9-9: 1 to obtain the modified fluorocarbon powder coating.
The hot bonding mixing process in the step (5) comprises the steps of adding A, B component powder into a mixing device according to the weight percentage, adjusting the temperature to the bonding temperature, preserving the heat for 3-10 minutes, mixing and stirring, stirring uniformly, cooling and packaging to obtain the modified fluorocarbon powder coating; the weight percentage of the bonding temperature to the added powder coating and the glass transition temperature TgIt is related.
The mixing device comprises a batching mixer, a ball mill or a high-speed stirrer.
Example 1
Preparing 1-6 parts of modified fluorocarbon powder coating sample powder for the aluminum surface according to the following steps:
firstly, respectively premixing A, B raw materials according to the weight percentage,
| component A ingredient name | By weight% | Name of component B | By weight% |
| Thermosetting fluorocarbon resin | 64.0 | Acrylic resin | 62.0 |
| Isocyanate curing agent | 16.0 | Polycarboxylic acids (anhydrides) | 14.6 |
| Leveling agent | 1.2 | Leveling agent | 1.0 |
| Toughening agent | 0.3 | Dispersing aid | 0.3 |
| Dispersing agent | 0.3 | Other auxiliaries | 1.7 |
| Coupling agent | 1.0 | Filler material | 8.4 |
| Other auxiliaries | 1.5 | Inorganic ceramic pigments | 12.0 |
| Filler material | 3.7 | ||
| Inorganic ceramic pigments | 12.0 |
Secondly, melting, mixing and extruding the pre-mixed A, B component raw materials by using a double-screw extruder respectively, wherein the temperature of an extruder I area is 110 ℃, and the temperature of an extruder II area is 110 ℃, wherein the extruder I area is an extruder melting and mixing section, and the extruder II area is an extruder feeding section;
thirdly, tabletting, cooling and crushing the extruded A, B component materials, and respectively carrying out fine crushing on the crushed materials by using an ACM (acid-milling and mechanical grinding) until the particle size of the powder is 10-100 microns;
fourthly, sieving the finely pulverized powder coating to obtain powder coating sample powder A, B by using a rotary sieve with a 180-mesh sieve screen, wherein the particle size of the powder coating is 20-80 microns;
and fifthly, thermally bonding and mixing the A, B component powder according to the weight ratio of 3:7, 5:5 and 7:3 respectively by using a high-speed stirrer at the temperature of 62-65 ℃ for 6 minutes, and uniformly mixing to obtain 1-3 modified fluorocarbon powder coating sample powder.
And sixthly, dry mixing the A, B component powder according to the weight ratio of 3:7, 5:5 and 7:3 respectively, and uniformly mixing to obtain the modified fluorocarbon powder coating sample powder 4-6.
Example 2
Preparing modified fluorocarbon powder coating sample powder 7-9 according to the following steps:
firstly, premixing the raw materials in percentage by weight,
| sample powder ingredient name | Sample powder 7% by weight | Sample powder 8% by weight | Sample powder 9% by weight |
| Thermosetting fluorocarbon resin | 44.8 | 32.0 | 19.2 |
| Isocyanate curing agent | 11.2 | 8.0 | 4.8 |
| Acrylic resin | 19.4 | 32.4 | 45.4 |
| Polycarboxylic acids (anhydrides) | 4.6 | 7.6 | 10.6 |
| Leveling agent | 1.2 | 1.2 | 1.2 |
| Toughening agent | 0.3 | 0.3 | 0.3 |
| Dispersing agent | 0.3 | 0.3 | 0.3 |
| Coupling agent | 1.0 | 1.0 | 1.0 |
| Other auxiliaries | 1.5 | 1.5 | 1.5 |
| Filler material | 3.7 | 3.7 | 3.7 |
| Inorganic ceramic pigments | 12.0 | 12.0 | 12.0 |
Secondly, melting, mixing and extruding the premixed raw materials by using a double-screw extruder, wherein the temperature of an extruder I area is 110 ℃, and the temperature of an extruder II area is 110 ℃, wherein the extruder I area is an extruder melting and mixing section, and the extruder II area is an extruder feeding section;
thirdly, tabletting, cooling and crushing the extruded material, and finely crushing the crushed material by using an ACM (acid-activated metal) mill until the particle size of the powder is 10-100 micrometers;
and fourthly, screening the finely ground powder coating to the particle size of 20-80 microns by using a rotary screen with a 180-mesh screen to prepare the pure modified powder coating sample powder 7-9.
The sample powder A and the sample powders 1-9 prepared in the examples 1-2 are respectively coated according to the following coating methods: coating the sample powder on a treated aluminum plate by a high-voltage electrostatic method or a fluidized bed method, wherein the thickness of the coating is 50-70 mu m, curing is carried out for 15 minutes at 200 ℃ by adopting a hot baking oven to obtain corresponding coating sample plates, the coatings of the corresponding coating sample plates obtained by the sample powder A prepared in the examples 1 and 2 and the sample powders 1-9 are respectively subjected to related performance tests, and the sample powder coating sample plates prepared in the examples 1 and 2 are tested according to a related standard (GSB AL631), and the obtained results can be shown as follows:
TABLE 1
TABLE 2
TABLE 3
The comparison of the embodiments shows that the coating coated by the sample powder 1-3 prepared by the thermal bonding mixing process has better coating appearance and more excellent weather resistance and other performances than the coating coated by the sample powder 4-6 prepared by the pure dry mixing process; compared with a coating coated by sample powder 7-9 adopting a co-extrusion process, the sample powder prepared by adopting a thermal bonding mixing process has better coating comprehensive performance. More importantly, under the condition that the content of fluorocarbon in a powder system is ensured to a certain extent, the modified fluorocarbon powder coating prepared by the thermal bonding mixing process has the weather resistance level equivalent to that of a coating coated by pure fluorocarbon powder sample powder A, and has better performances such as coating smoothness, adhesive force and the like.
Example 3
According to the method of the embodiment 1, modified fluorocarbon powder sample powder is prepared by using C, D component raw materials, wherein the modified fluorocarbon powder sample powder comprises C, D prepared component powder, and the modified fluorocarbon powder sample powder is prepared by respectively carrying out thermal bonding and mixing according to the weight ratio of 2:8, 5:5 and 8:2, and the sample powder is 10-12, and the specific formula of the raw materials is as follows:
according to the coating method used in example 2, the sample powders 10 to 12 prepared in example 3 were coated, and the coating sample coated with the prepared sample powders was tested according to the relevant standard (GSB AL631), and the results are shown in the following table:
TABLE 4
Example 4
According to the method of the embodiment 1, E, F parts of raw materials are used for preparing modified fluorocarbon powder sample powder, wherein the method comprises the following steps of respectively carrying out thermal bonding and mixing on E, F prepared component powder according to the weight ratio of 1:9, 5:5 and 9:1 to prepare sample powder 13-15, and the specific formula of the raw materials is as follows:
the coating methods used to prepare the powder samples of example 2 were used to coat the powder samples 13-15 of this example and the powder coating samples were tested according to the relevant standard (GSB AL631) and the results are shown in the following table:
TABLE 5
Example 5
According to the method of the embodiment 1, G, H parts of raw materials are used for preparing modified fluorocarbon powder sample powder, wherein the method comprises the following steps of respectively carrying out thermal bonding and mixing on G, H prepared component powder according to the weight ratio of 4:6, 5:5 and 6:4 to prepare sample powder 16-18, and the specific formula of the raw materials is as follows:
the coating methods used to prepare the powder samples of example 2 were used to coat the powder samples 16-18 of this example and the powder coating samples were tested according to the relevant standard (GSB AL631) and the results are shown in the following table:
TABLE 6
According to the comparison of the embodiments 3 to 5, the sample powder prepared by adopting the raw materials with different weight percentages is subjected to the coating treatment by the thermal bonding mixing process from low to high to obtain the coating coated with the corresponding sample powder 10 to 18, and the test is carried out according to the relevant standard (GSB AL631), so that the coating coatings of the sample powder 10 to 18 finally prepared by adopting the raw materials with different weight percentages and performing the thermal bonding mixing process from low to high have the performances of good coating appearance, excellent weather resistance and the like; meanwhile, under the condition that the content of fluorocarbon in the system is ensured to a certain extent, the coating coated by the invention has the weather resistance level equivalent to that of the coating coated by the pure fluorocarbon powder sample powder A, and has good performances of coating smoothness, adhesive force and the like; namely, the formula and the preparation method have better universality; finally, on the basis of keeping the super-strong weather resistance of a fluorocarbon system, the modified fluorocarbon powder coating prepared by the invention overcomes the problems of poor adhesion, poor impact resistance, poor pigment and filler dispersibility and the like of thermosetting fluorocarbon powder, improves the storage stability of the powder, reduces the comprehensive cost, and is more easily accepted by users on the basis of meeting the requirements of customers.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. If various changes or modifications to the present invention are made without departing from the spirit and scope of the present invention, it is intended that the present invention encompass such changes and modifications as fall within the scope of the claims and the equivalent technology of the present invention.
Claims (8)
1. The modified fluorocarbon powder coating for the aluminum surface is characterized by comprising the following components in parts by weight: the adhesive is prepared by A, B components according to the weight ratio of 1: 9-9: 1 through a thermal bonding mixing process,
the component A comprises the following raw materials in percentage by weight:
the sum of the weight percentages of the components is 100 percent;
the component B comprises the following raw materials in percentage by weight:
the sum of the weight percentages of the components is 100 percent;
the preparation method of the modified fluorocarbon powder coating for the aluminum surface comprises the following steps:
(1) premixing raw materials of the A, B component formula according to the corresponding weight percentage respectively;
(2) respectively melting and mixing the raw materials of the A, B components after premixing;
(3) tabletting the extruded A, B component material, and respectively crushing and finely crushing after cooling;
(4) respectively carrying out classification screening on the A, B component powder after the fine crushing;
(5) the modified fluorocarbon powder coating is prepared from A, B component powder subjected to classified screening through a thermal bonding mixing process according to the weight ratio of 1: 9-9: 1, wherein the thermal bonding mixing process comprises the steps of adding A, B component powder into a mixing device according to the weight percentage, adjusting the temperature to the bonding temperature, preserving the temperature for 3-10 minutes, mixing and stirring, cooling and packaging to obtain the modified fluorocarbon powder coating; the weight percentage of the bonding temperature to the added powder coating and the glass transition temperature TgIt is related.
2. The modified fluorocarbon powder coating for aluminum surfaces as set forth in claim 1, wherein: the thermosetting fluorocarbon resin comprises a copolymer of alkyl vinyl ether and fluoroolefin or a copolymer of alkyl vinyl ester and fluoroolefin, and the alkyl vinyl ether is one of cyclohexyl vinyl ether, hydroxybutyl vinyl ether, ethyl vinyl ether and glycidyl vinyl ether; the alkyl vinyl ester is one of vinyl acetate, vinyl caproate, vinyl pivalate, vinyl neononanoate and vinyl neodecanoate.
3. The modified fluorocarbon powder coating for aluminum surfaces as set forth in claim 2, wherein: the fluoroolefin comprises chlorotrifluoroethylene or tetrafluoroethylene.
4. The modified fluorocarbon powder coating for aluminum surfaces as set forth in claim 1, wherein: the isocyanate curing agent comprises one of blocked trimethylolpropane diisocyanate adduct, blocked isophorone diisocyanate trimer, hexamethylene diisocyanate adduct and diethyl ketone diisocyanate adduct; the coupling agent comprises one or more of titanate coupling agent, zirconate coupling agent, aluminate coupling agent, bimetallic coupling agent and rare earth coupling agent.
5. The modified fluorocarbon powder coating for aluminum surfaces as set forth in claim 1, wherein: the inorganic ceramic pigment comprises one or more of cobalt blue, cobalt green, cobalt black, copper chromium black, titanium nickel yellow and cadmium tanning.
6. The modified fluorocarbon powder coating for aluminum surfaces as set forth in claim 1, wherein: the acrylic resin is thermosetting resin or thermoplastic resin; wherein the thermosetting resin comprises one or more of epoxy acrylic acid, hydroxy acrylic acid and carboxyl acrylic resin.
7. The modified fluorocarbon powder coating for aluminum surfaces as set forth in claim 1, wherein: in the polycarboxylic acid or the polybasic acid anhydride, the polycarboxylic acid comprises one or more of adipic acid, dodecanedioic acid, tetradecanedioic acid and octadecanedioic acid.
8. The modified fluorocarbon powder coating for aluminum surfaces as set forth in claim 1, wherein: the mixing device is a batching mixer, a ball mill or a high-speed stirrer.
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| CN201711403659.1A CN108192433B (en) | 2017-12-22 | 2017-12-22 | Modified fluorocarbon powder coating for aluminum surface and preparation method thereof |
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| CN201711403659.1A CN108192433B (en) | 2017-12-22 | 2017-12-22 | Modified fluorocarbon powder coating for aluminum surface and preparation method thereof |
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| CN110791182A (en) * | 2019-11-08 | 2020-02-14 | 甘肃西部邦奇装饰材料科技有限公司 | Heat-preservation and heat-insulation powder coating for aluminum alloy doors and windows and preparation method thereof |
| CN111040525B (en) * | 2019-12-19 | 2021-12-21 | 广东西敦千江粉漆科学研究有限公司 | PVDF metal powder coating for metal surface and preparation method thereof |
| CN111154351B (en) * | 2019-12-26 | 2021-10-15 | 中航百慕新材料技术工程股份有限公司 | Self-layering FEVE fluorocarbon coating and preparation method thereof |
| CN114085574A (en) * | 2021-11-22 | 2022-02-25 | 擎天材料科技有限公司 | Powder coating and preparation method and application thereof |
| CN114011672A (en) * | 2021-11-23 | 2022-02-08 | 上海金泛斯标识有限公司 | Aluminum profile spraying process |
| CN116606577B (en) * | 2023-04-26 | 2024-07-23 | 广东美涂士建材股份有限公司 | Easily-scrubbed waterproof stone-like coating and preparation method thereof |
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