CN115322628A - High-wear-resistance fluorocarbon powder coating and preparation method thereof - Google Patents
High-wear-resistance fluorocarbon powder coating and preparation method thereof Download PDFInfo
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- CN115322628A CN115322628A CN202210766358.XA CN202210766358A CN115322628A CN 115322628 A CN115322628 A CN 115322628A CN 202210766358 A CN202210766358 A CN 202210766358A CN 115322628 A CN115322628 A CN 115322628A
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- 238000000576 coating method Methods 0.000 title claims abstract description 94
- 239000011248 coating agent Substances 0.000 title claims abstract description 84
- 239000000843 powder Substances 0.000 title claims abstract description 53
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 39
- 239000010431 corundum Substances 0.000 claims abstract description 39
- 239000002245 particle Substances 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 13
- 239000000919 ceramic Substances 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 9
- 239000011325 microbead Substances 0.000 claims abstract description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 69
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 9
- 238000000967 suction filtration Methods 0.000 claims description 9
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 239000012153 distilled water Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000002530 phenolic antioxidant Substances 0.000 claims 1
- 239000006087 Silane Coupling Agent Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 7
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 125000000962 organic group Chemical group 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 4
- -1 polychlorotrifluoroethylene Polymers 0.000 description 4
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 4
- 239000013638 trimer Substances 0.000 description 4
- 244000137852 Petrea volubilis Species 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000004005 microsphere Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- 150000001263 acyl chlorides Chemical class 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical class [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- 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
-
- 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
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
Abstract
The invention discloses a high wear-resistant fluorocarbon powder coating and a preparation method thereof, belonging to the technical field of powder coatings and comprising the following raw materials in parts by weight: 50-60 parts of FEVE resin, 3-4 parts of wear-resistant particles, 2.5-3 parts of wear-resistant auxiliary agents, 4-5 parts of curing agents, 0.2-0.3 part of flatting agents and 0.2-0.3 part of antioxidants, and the raw materials are mixed at high speed, extruded and tableted, crushed and sieved to prepare the high-wear-resistant fluorocarbon powder coating. The invention adds modified corundum as wear-resistant particles into the coating, and adds ceramic micro-beads and nano SiO 570 treated by silane coupling agent 2 As a wear-resistant auxiliary agent, the wear-resistant performance of the powder coating can be remarkably improved, and the negative influence on the comprehensive performance of a coating is avoided; the obtained powder coating can be suitable for the field with high requirement on wear resistance, and the application range of the fluorocarbon powder coating is expanded.
Description
Technical Field
The invention belongs to the technical field of powder coatings, and particularly relates to a high-wear-resistance fluorocarbon powder coating and a preparation method thereof.
Background
The powder coating is widely applied to various fields because of the advantages of no organic solvent, good environmental protection, convenient storage and transportation, and the like. The fluorocarbon powder coating is a powder coating which takes fluororesin as a main film forming substance, has particularly excellent weather resistance, heat resistance, low temperature resistance and chemical resistance, and has unique non-adhesiveness and low friction. The fluorocarbon powder coating does not contain volatile compounds (VOC), reduces the harm to human bodies, accords with ROHS, does not contain toxic heavy metals, and belongs to environment-friendly coatings.
However, pure fluorocarbon powder coatings have defects in wear resistance, and in some special occasions, higher requirements are put on the wear resistance of the powder coatings, so that the wear resistance of the powder coatings needs to be improved. In the prior art, inorganic wear-resistant particles such as corundum and carborundum are mostly adopted as reinforcing fillers to be added into fluorocarbon powder coating to improve the wear-resistant performance of the fluorocarbon powder coating. Although the inorganic wear-resistant particles can play a certain role, the wettability of the fluorocarbon resin to the inorganic nanoparticles is poor, and the binding force between the inorganic nanoparticles and the fluorocarbon resin is weak, so that the inorganic wear-resistant particles are difficult to uniformly disperse in the coating, the wear-resistant enhancement characteristic is difficult to better play, and the comprehensive performance of the coating is influenced. Therefore, the abrasion resistance of fluorocarbon powder coatings needs to be further improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-wear-resistance fluorocarbon powder coating and a preparation method thereof.
The invention adds modified corundum as wear-resistant particles into the coating, and adds ceramic micro-beads and nano SiO which are treated by silane coupling agent KH570 2 As a wear-resistant auxiliary agent, the wear-resistant performance of the powder coating can be remarkably improved, and the negative influence on the comprehensive performance of a coating is avoided; the obtained powder coating can be suitable for the field with high requirement on wear resistance, and the application range of the fluorocarbon powder coating is expanded.
The purpose of the invention can be realized by the following technical scheme:
a high wear-resistant fluorocarbon powder coating comprises the following raw materials in parts by weight: 50-60 parts of FEVE resin (polychlorotrifluoroethylene/vinyl ether resin), 3-4 parts of wear-resistant particles, 2.5-3 parts of wear-resistant auxiliary agent, 4-5 parts of curing agent, 0.2-0.3 part of flatting agent and 0.2-0.3 part of antioxidant;
the preparation method of the fluorocarbon powder coating comprises the following steps:
firstly, weighing the raw materials according to the weight ratio, and mixing the raw materials by adopting a high-speed mixer for 6-10min;
and secondly, extruding and tabletting the mixed raw materials in the first step in an extruder, and then cooling, crushing and sieving to obtain the fluorocarbon powder coating.
Further, the leveling agent is a leveling agent RB788, which may not use benzoin.
Further, the antioxidant is hindered phenol antioxidant KY-1010.
Further, the curing agent was a trimer 755K curing agent (polyisocyanate).
Further, the wear-resistant auxiliary agent is prepared from ceramic microspheres and nano SiO 2 The adhesive is compounded according to the mass ratio of 1;
the specific treatment process is as follows:
mixing ceramic micro-beads and nano SiO 2 Adding into toluene, performing ultrasonic dispersion for 1h, adding 20% KH570 toluene solution, reacting at 60 deg.C for 6h, filtering immediately after reaction, repeatedly washing with anhydrous ethanol, and vacuum drying at 45 deg.C to obtain the final product;
ceramic micro-beads and nano SiO 2 The dosage ratio of the toluene to the toluene solution of KH570 is 1g;
ceramic micro-beads and nano SiO 2 After KH570 treatment, the modified silicon carbide particles are added into the coating, so that the compatibility with a coating matrix can be improved, a Si-0-Si covalent bond network with good wear resistance is formed and uniformly mixed with a resin system, and a compact coating is formed, thereby assisting in improving the wear resistance of the coating.
Further, the wear resistant particles are prepared by the steps of:
s1, mixing corundum and NaOH aqueous solution (mass fraction is 40%) according to a solid-to-liquid ratio of 0.1g; the granularity of the corundum is 10-20 mu m;
after the corundum is subjected to alkali treatment by NaOH aqueous solution, more-OH is formed on the surface of the corundum, and reaction sites are laid for subsequent modification;
s2, mixing the pretreated corundum with toluene, performing ultrasonic dispersion for 10min, adding triethylamine, dropping a toluene solution (the mass fraction of 10%) of 3-phenyl-2-acryloyl chloride into a reaction system by using a constant-pressure dropping funnel, raising the temperature, reacting for 4-5h under the conditions of stirring and 55 ℃, performing suction filtration, and sequentially washing for 3-4 times by using ethanol and distilled water to obtain wear-resistant particles; the dosage ratio of the toluene solution of pretreated corundum, toluene, triethylamine and 3-phenyl-2-acryloyl chloride is 1g;
reacting-OH on the surface of the corundum with acyl chloride on 3-phenyl-2-acryloyl chloride molecules to generate ester groups, and grafting the 3-phenyl-2-acryloyl chloride molecules on the surface of the corundum;
the organic group is introduced on the corundum surface through modification, and the organic group contains a benzene ring, so that the agglomeration phenomenon among corundum particles can be reduced, the compatibility of the corundum particles and a fluorocarbon resin matrix can be improved, the uniform dispersion of the corundum particles in the coating is promoted, the corundum particles are particles with extremely high wear resistance, and are uniformly distributed in the coating, so that the wear resistance is effectively exerted, and the coating is endowed with good wear resistance; in addition, benzene rings introduced into the surface of the corundum belong to rigid groups, so that the strength of the coating can be effectively improved, and the wear resistance of the coating is improved; furthermore, the corundum surface is introduced with-C = C, and can generate crosslinking reaction with C = C double bonds in resin in the curing process of the powder coating to generate a tighter inorganic/organic coating, so that the wear resistance of the coating is greatly enhanced.
The invention has the beneficial effects that:
in order to improve the wear resistance of the fluorocarbon coating, the wear-resistant particles are added into the coating, the wear-resistant particles are corundum subjected to modification treatment, organic groups are introduced on the surface of the corundum through modification, and the organic groups contain benzene rings, so that the agglomeration phenomenon among the corundum particles can be reduced, the compatibility of the corundum particles and a fluorocarbon resin matrix can be improved, the uniform dispersion of the corundum particles in the coating is promoted, the corundum particles are particles with extremely high wear resistance and are uniformly distributed in the coating, the wear-resistant characteristic is effectively exerted, and the coating is endowed with good wear resistance; in addition, the benzene ring introduced into the corundum surface belongs to a rigid group, so that the strength of the coating can be effectively improved, and the wear resistance of the coating is improved; furthermore, the corundum surface is introduced with-C = C, and can generate cross-linking reaction with C = C double bonds in resin in the curing process of the powder coating to generate a tighter inorganic/organic coating, so that the wear resistance of the coating is greatly enhanced;
and wear-resistant auxiliary agents are added into the coating, wherein the wear-resistant auxiliary agents are ceramic microspheres and nano SiO 2 The coating is obtained by KH570 treatment, and can be added into a coating to improve the compatibility with a coating matrix, form a Si-0-Si covalent bond network with good wear resistance and uniformly mix with a resin system to form a compact coating, thereby assisting in improving the wear resistance of the coating;
the powder coating obtained by the invention can obviously improve the wear resistance of the powder coating, and does not have negative influence on the comprehensive performance of the coating; the obtained powder coating can be suitable for the field with high requirement on wear resistance, and the application range of the fluorocarbon powder coating is expanded.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Preparing a wear-resistant auxiliary agent:
1g of ceramic micro-beads and 1g of nano SiO 2 Adding the mixture into 60mL of toluene, performing ultrasonic dispersion for 1h, adding 20mL of toluene solution with the mass fraction of 20% KH570, reacting for 6h at 60 ℃, performing suction filtration immediately after the reaction is finished, repeatedly washing with absolute ethyl alcohol, and performing vacuum drying on the product at 45 ℃ to obtain the wear-resistant auxiliary agent.
Example 2
Preparing a wear-resistant auxiliary agent:
2g of ceramic microspheres and 2g of nano SiO 2 Adding the mixture into 120mL of toluene, carrying out ultrasonic dispersion for 1h, adding 40mL of toluene solution with the mass fraction of 20% KH570, reacting for 6h at 60 ℃, immediately carrying out suction filtration after the reaction is finished, repeatedly washing with absolute ethyl alcohol, and carrying out vacuum drying on the product at 45 ℃ to obtain the wear-resistant auxiliary agent.
Example 3
Preparing wear-resistant particles:
s1, mixing 1g of corundum with the granularity of 10 microns with 100mL of NaOH aqueous solution (mass fraction is 40%), raising the temperature to 60 ℃, stirring for 30min, carrying out suction filtration, and repeatedly washing with distilled water until the pH value of washing liquor is neutral to obtain pretreated corundum;
s2, mixing 1g of pretreated corundum with 180mL of toluene, performing ultrasonic dispersion for 10min, adding 0.03g of triethylamine, dropping 9.5mL of toluene solution (mass fraction is 10%) of 3-phenyl-2-acryloyl chloride into the reaction system by using a constant-pressure dropping funnel, raising the temperature, reacting for 4h under the conditions of stirring and 55 ℃, performing suction filtration, and sequentially washing with ethanol and distilled water for 3 times to obtain the wear-resistant particles.
Example 4
Preparing wear-resistant particles:
s1, mixing 2g of corundum with the granularity of 20 microns with 200mL of NaOH aqueous solution (mass fraction is 40%), raising the temperature to 60 ℃, stirring for 30min, carrying out suction filtration, and repeatedly washing with distilled water until the pH value of washing liquor is neutral to obtain pretreated corundum;
s2, mixing 2g of pretreated corundum with 360mL of toluene, carrying out ultrasonic dispersion for 10min, adding 0.06g of triethylamine, dropping 19mL of toluene solution (mass fraction is 10%) of 3-phenyl-2-acryloyl chloride into a reaction system by using a constant-pressure dropping funnel, raising the temperature, reacting for 5h under the conditions of stirring and 55 ℃, carrying out suction filtration, and sequentially washing for 4 times by using ethanol and distilled water to obtain the wear-resistant particles.
Example 5
A high wear-resistant fluorocarbon powder coating comprises the following raw materials: 50g of FEVE resin (polychlorotrifluoroethylene/vinyl ether resin), 3g of the wear-resistant particles prepared in example 3, 2.5g of the wear-resistant assistant prepared in example 1, 4g of trimer 755K curing agent, 80.2g of flatting agent RB7880, and 0.2g of hindered phenol antioxidant KY-1010;
the preparation method of the fluorocarbon powder coating comprises the following steps:
firstly, mixing the raw materials by adopting a high-speed mixer for 6min;
and secondly, extruding and tabletting the raw materials mixed in the first step in an extruder, and then cooling, crushing and sieving to obtain the fluorocarbon powder coating.
Example 6
A high wear-resistant fluorocarbon powder coating comprises the following raw materials: 55g of FEVE resin (polychlorotrifluoroethylene/vinyl ether resin), 3.5g of the wear-resistant particles prepared in example 3, 2.8g of the wear-resistant auxiliary prepared in example 1, 4.5g of trimer 755K curing agent, 80.25g of flatting agent RB78, and KY-10100.25g of hindered phenol antioxidant;
the preparation method of the fluorocarbon powder coating comprises the following steps:
firstly, mixing the raw materials by adopting a high-speed mixer for 8min;
and secondly, extruding and tabletting the mixed raw materials in the first step in an extruder, and then cooling, crushing and sieving to obtain the fluorocarbon powder coating.
Example 7
A high wear-resistant fluorocarbon powder coating comprises the following raw materials: 60g of FEVE resin (polychlorotrifluoroethylene/vinyl ether resin), 4g of the wear-resistant particles prepared in example 3, 3g of the wear-resistant assistant prepared in example 1, 5g of trimer 755K curing agent, 80.3g of flatting agent RB78, and KY-10100.3g of hindered phenol antioxidant;
the preparation method of the fluorocarbon powder coating comprises the following steps:
firstly, mixing the raw materials by adopting a high-speed mixer for 10min;
and secondly, extruding and tabletting the raw materials mixed in the first step in an extruder, and then cooling, crushing and sieving to obtain the fluorocarbon powder coating.
Comparative example 1
The wear-resistant particles in example 5 were changed to corundum, and the remaining raw materials and preparation process were unchanged.
Comparative example 2
The raw materials of the abrasion-resistant auxiliary agent in the embodiment 5 are removed, and the rest raw materials and the preparation process are unchanged.
The powder coatings obtained in examples 5 to 7 and comparative examples 1 to 2 were electrostatically sprayed on the surface of an aluminum plate and then cured in a hot air oven at 160 ℃ for 15 minutes to form a coating, and the following performance tests were performed:
the hardness of the coatings was tested according to GB/T6739-1996;
the adhesion of the coating was tested according to GB/T9286-1998;
and (3) wear resistance test: selecting S-33 type sand paper as a friction material, converting new sand paper into the sand paper every test of 100 g, and measuring the abrasion loss of 200 rotating coatings, wherein the test load is 500 g;
the results obtained are shown in the following table:
| example 5 | Example 6 | Example 7 | Comparative example 1 | Comparative example 2 | |
| Hardness of | >H | >H | >H | - | - |
| Adhesion/grade | 0 | 0 | 0 | - | - |
| Mass loss/mg | 94.9 | 93.8 | 94.5 | 108.4 | 98.8 |
As can be seen from the data in the table above, the hardness and the adhesive force of the powder coating prepared by the invention can meet the use requirements, and after a wear-resistant test, the mass loss is small, which indicates that the powder coating has high wear resistance; the data of the comparative example 1 show that the corundum can be uniformly dispersed in the coating after being modified, so that the wear-resisting property can be better exerted, and the data of the comparative example 2 show that the wear-resisting additive can assist in improving the wear-resisting property of the coating.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. The high wear-resistant fluorocarbon powder coating is characterized by comprising the following raw materials in parts by weight: 50-60 parts of FEVE resin, 3-4 parts of wear-resistant particles, 2.5-3 parts of wear-resistant auxiliary agent, 4-5 parts of curing agent, 0.2-0.3 part of flatting agent and 0.2-0.3 part of antioxidant;
wherein the wear resistant particles are prepared by the following steps:
s1, mixing corundum and a NaOH aqueous solution according to a solid-to-liquid ratio of 0.1g to 10mL, raising the temperature to 60 ℃, stirring for 30min, carrying out suction filtration, and repeatedly washing with distilled water until the pH value of washing liquor is neutral to obtain pretreated corundum;
s2, mixing the pretreated corundum with toluene, performing ultrasonic dispersion for 10min, adding triethylamine, dripping a toluene solution of 3-phenyl-2-acryloyl chloride into a reaction system by using a constant-pressure dropping funnel, raising the temperature, reacting for 4-5h under the conditions of stirring and 55 ℃, performing suction filtration, and sequentially washing with ethanol and distilled water for 3-4 times to obtain the wear-resistant particles.
2. A highly wear-resistant fluorocarbon powder coating as claimed in claim 1, characterized in that said NaOH aqueous solution in step S1 is in mass fraction of 40%, and the corundum has a particle size of 10-20 μm.
3. A highly wear-resistant fluorocarbon powder coating as claimed in claim 1, wherein the mass fraction of the toluene solution of 3-phenyl-2-acryloyl chloride in step S2 is 10%, and the dosage ratio of the toluene solution of pretreated corundum, toluene, triethylamine, 3-phenyl-2-acryloyl chloride is 1g.
4. The high wear-resistant fluorocarbon powder coating as claimed in claim 1, wherein the antioxidant is hindered phenolic antioxidant KY-1010.
5. The high wear-resistant fluorocarbon powder coating as claimed in claim 1, wherein said wear-resistant assistant is composed of ceramic micro-beads and nano SiO 2 The coating is compounded according to the mass ratio of 1.
6. The high wear-resistant fluorocarbon powder coating as claimed in claim 5, characterized in that the specific treatment process is as follows:
mixing ceramic micro-beads and nano SiO 2 Adding into toluene, ultrasonically dispersing for 1h, adding 20% KH570 toluene solution, reacting at 60 deg.C for 6h, filtering immediately after reaction, repeatedly washing with anhydrous ethanol, vacuum drying at 45 deg.C, and finishing the treatment process.
7. The preparation method of high wear-resistant fluorocarbon powder coating as claimed in claim 1, characterized by comprising the following steps:
firstly, weighing the raw materials according to the weight ratio, and mixing the raw materials by adopting a high-speed mixer for 6-10min;
and secondly, extruding and tabletting the mixed raw materials in the first step in an extruder, and then cooling, crushing and sieving to obtain the fluorocarbon powder coating.
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| CN202210766358.XA CN115322628B (en) | 2022-06-30 | 2022-06-30 | High-wear-resistance fluorocarbon powder coating and preparation method thereof |
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| CN202210766358.XA CN115322628B (en) | 2022-06-30 | 2022-06-30 | High-wear-resistance fluorocarbon powder coating and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007005249A2 (en) * | 2005-06-29 | 2007-01-11 | Hyperbranch Medical Technology, Inc. | Nanoparticles and dendritic-polymer-based hydrogels comprising them |
| CN101469141A (en) * | 2007-12-28 | 2009-07-01 | 中国科学院兰州化学物理研究所 | Method for preparing multi-wall carbon nano-tube composite material |
| CN103483942A (en) * | 2013-08-26 | 2014-01-01 | 广州擎天材料科技有限公司 | Perfluorocarbon powder paint with texture effect and preparation method thereof |
| CN103849260A (en) * | 2014-02-21 | 2014-06-11 | 广东华江粉末科技有限公司 | Pure fluorocarbon powder coating for aluminum profile and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007005249A2 (en) * | 2005-06-29 | 2007-01-11 | Hyperbranch Medical Technology, Inc. | Nanoparticles and dendritic-polymer-based hydrogels comprising them |
| CN101469141A (en) * | 2007-12-28 | 2009-07-01 | 中国科学院兰州化学物理研究所 | Method for preparing multi-wall carbon nano-tube composite material |
| CN103483942A (en) * | 2013-08-26 | 2014-01-01 | 广州擎天材料科技有限公司 | Perfluorocarbon powder paint with texture effect and preparation method thereof |
| CN103849260A (en) * | 2014-02-21 | 2014-06-11 | 广东华江粉末科技有限公司 | Pure fluorocarbon powder coating for aluminum profile and preparation method thereof |
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| CN115322628B (en) | 2023-04-11 |
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Denomination of invention: A high wear-resistant fluorocarbon powder coating and its preparation method Granted publication date: 20230411 Pledgee: China Construction Bank Co.,Ltd. Anqing Chengzhong Branch Pledgor: Anhui dengwang Chemical Co.,Ltd. Registration number: Y2024980014784 |