CN107652795A - A kind of super-hydrophobic powdery paints and its preparation method and application - Google Patents

A kind of super-hydrophobic powdery paints and its preparation method and application Download PDF

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Publication number
CN107652795A
CN107652795A CN201710886318.8A CN201710886318A CN107652795A CN 107652795 A CN107652795 A CN 107652795A CN 201710886318 A CN201710886318 A CN 201710886318A CN 107652795 A CN107652795 A CN 107652795A
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super
hydrophobic
powder
coating
resin
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张友法
刘承志
余新泉
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Southeast University
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Southeast University
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D127/00Coating 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
    • C09D127/02Coating 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
    • C09D127/12Coating 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
    • C09D127/18Homopolymers or copolymers of tetrafluoroethene
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D167/00Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D175/00Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03Powdery paints
    • C09D5/033Powdery paints characterised by the additives
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/16Antifouling paints; Underwater paints
    • C09D5/1606Antifouling paints; Underwater paints characterised by the anti-fouling agent
    • C09D5/1612Non-macromolecular compounds
    • C09D5/1618Non-macromolecular compounds inorganic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/34Silicon-containing compounds
    • C08K3/36Silica
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00Use of pretreated ingredients
    • C08K9/04Ingredients treated with organic substances
    • C08K9/06Ingredients treated with organic substances with silicon-containing compounds

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses a kind of super-hydrophobic powdery paints and its preparation method and application, the coating includes hydrophobic powder and needs the resin-oatmeal of hot setting, and the mass ratio of hydrophobic powder and resin-oatmeal is 1:1~4;Wherein, hydrophobic powder is at least one of the polytetrafluoroethylene (PTFE) that particle diameter is 10~50 μm, Kynoar, hydrophobically modified silica, hydrophobically modified titanium dioxide, hydrophobically modified CNT, carbon black, and resin-oatmeal is that particle diameter is 10~50 μm and can be used at least one of epoxy or polyesters powder of electrostatic plastic spraying.The method of the invention is simple and convenient, prepares rapidly, can be rapidly completed the preparation of super-hydrophobic coat on matrix surface;The coating that the present invention prepares has super-hydrophobicity and super-high wear-resistant concurrently.

Description

A kind of super-hydrophobic powdery paints and its preparation method and application
Technical field
The invention belongs to technical field of material chemistry, is related to a kind of coating and coating technology, and specially a kind of super-hydrophobic powder applies Material and its preparation method and application.
Background technology
Many natural materials in nature being present, itself shows certain hydrophobic performance due to special structure, It is typically include lotus leaf and insect wing etc..People are earliest from the surface observation of lotus leaf to this phenomenon, and by studying lotus The planform and material of leaf surface, it is proposed that super-hydrophobic concept, and have developed super-hydrophobic surface coating.By largely grinding Study carefully discovery, the super hydrophobic surface of nature often has coarse nanostructured and low-surface energy substance, thus in low-surface-energy Rough surface is built on material and the material of low-surface-energy is modified on coarse surface texture, super hydrophobic surface can be prepared Bionic coating.However, at present in prepared super-hydrophobic coat, the wearability of coating and the ultra-hydrophobicity of coating are often one To the concept runed counter to simultaneously, it is difficult to improve.While strengthening coating abrasion performance, the decline of coating hydrophobic performance is usually associated with; It is otherwise also such.Such as Guo Yong just wait by PMMA add tetrahydrofuran in, after being completely dissolved addition hydrophobic silica powder, stir It is coated in after mixing 2h with dropper on clean slide, PMMA/SiO is obtained after being dried at 40 DEG C2Composite coating.The table of the coating Face contact angle is up to more than 150 °, and roll angle is less than 3 °.But its wearability is bad, can not ensure upon wear still with very strong Hydrophobic effect.
The content of the invention
The technical problem of solution:The defects of in order to overcome prior art, obtain one kind and have super-hydrophobicity and super-high wear-resistant concurrently Property coating, and a kind of operation is easy, and cost is low, simple effective method, and the invention provides a kind of super-hydrophobic powder to apply Material and its preparation method and application.
Technical scheme:A kind of super-hydrophobic powdery paints, the coating include hydrophobic powder and need the resin-oatmeal of hot setting, dredges The mass ratio of pigment and resin-oatmeal is 1:1~4;Wherein, hydrophobic powder is the polytetrafluoroethylene (PTFE), polyvinylidene fluoride that particle diameter is 10~50 μm At least one of alkene, hydrophobically modified silica, hydrophobically modified titanium dioxide, hydrophobically modified CNT, carbon black, resin-oatmeal is Particle diameter is 10~50 μm and can be used at least one of epoxy or polyesters powder of electrostatic plastic spraying.
Preferably, methods described is that hydrophobic powder and resin-oatmeal are blended in proportion;Or by the two be blended in proportion after pass through again Melting stirring, extrusion, tabletting, broken, efflorescence process prepare.
Further, methods described is specially:
(1) powder is mixed:Hydrophobic powder is mixed with resin-oatmeal by proportioning, 5-10min is mixed in high-speed mixer;
(2) melting extrusion:Mixed-powder puts into double-screw agitator, in 120~140 DEG C of screw sleeve temperature, rotating speed 100 Extruded under the conditions of~300r/m;
(3) tabletting and broken:By the slurry of extrusion directly cooled down with twin-roll machine and roll to 1~3mm of thickness, length and width 3~ 5mm irregular shape thin slice;
(4) efflorescence:Thin slice after broken is ground, sieving, sieve mesh number is 300 mesh, obtains super-hydrophobic powder.
Application of the described super-hydrophobic powdery paints in super-high wear-resistant super-hydrophobic coat is prepared.
Preferably, the coating is made by following methods:By super-hydrophobic powdery paints organic solvent it is dispersed after match somebody with somebody Into dispersion liquid, roller coat, brush or be sprayed at workpiece surface;Or workpiece surface is directly coated on by electrostatic spraying mode, then It is heated to more than solidification temperature, makes its melting, levelling, reaction film-forming, after cooling, you can there is super-high wear-resistant described in obtaining The coating of property and super-hydrophobicity;The organic solvent is at least one of ethanol, isopropanol, butyl acetate;Dispersion liquid concentration For 0.1g/mL~1g/mL.
Preferably, the solidification temperature is 150~330 DEG C, and hardening time is 10~30min.
Preferably, the input voltage of the electrostatic spraying mode is 220V, and the output of spray gun electrostatic is 10~100KV, for powder 0.4~0.5MPa of air pressure, spray distance are 150~250mm.
Preferably, the thickness that film is prepared using powdery paints solution roller coat, brushing or spraying is 10~200 μm;Utilize The coating thickness of electrostatic plastic spraying film forming is 40~120 μm.
Coating described in any of the above, the coating include super-hydrophobic powdery paints.
The specific preparation method of above-mentioned coating is as follows:
(1) preparation of hydrophobically modified powder:The selection of hydrophobically modified powder have a lot, can be silicon fluoride be modified Ludox Silicon dioxide powder or the gas phase hydrophobic titanium dioxide silica flour of modification, comparatively the former performance is more preferable, and powder diameter is 10~50 μm, hydrophobically modified powder adds Ludox and changed by silicon fluoride and tetraethyl orthosilicate using absolute ethyl alcohol as solvent Property, dry, pulverize after stirring 24h;
(2) hydrophobically modified powder and resin-oatmeal blending:Resin is heated into melting temperature melts toner, adds thin Water modified powder simultaneously continues to stir, and by melting extrusion, as being dried at 80 DEG C of baking oven, dried object tabletting, broken is finally ground Grinds, particle diameter are 10~50 μm.Obtained mixed-powder is dispersed in organic solvent, organic solvent can be second Alcohol, isopropanol, butyl acetate etc., mixed solution is in slightly thick, the drop of dropwise addition 3~4 silicon fluorides into solution, placement ultrasonoscope Ultrasound 5~10 minutes in device;
(3) super-hydrophobic coat is prepared in substrate surface:The good solution of ultrasound is uniformly brushed onto substrate, substrate can be Sheet glass, tinplate sheet and aluminium flake etc.;In addition solution can also be fitted into spray gun, powder solution is sprayed on substrate surface;
(4) resin hot melt solidification:The substrate sample brushed is placed in baking oven and heated, temperature is adjusted to resin solidification temperature Degree, the toner in coating is set to melt solidify afterwards, hydrophobically modified powder bonding is good, sample can also be placed in thermal station and added Heat, cooling is taken off after 10~30min, you can obtain the super-hydrophobic coat with excellent wear.
Heating-up temperature is not fixed described in step (4), depending on toner solidification temperature used, when being heating and curing Between with resin process is different and difference.
Beneficial effect:
(1) the method for the invention is simple and convenient, prepares the system that rapidly, can be rapidly completed super-hydrophobic coat on matrix surface It is standby.
(2) hydrophobically modified powder can migrate to surface certainly when coating is heated and solidified, and form super-hydrophobic coat (such as Fig. 1 institutes Show), cold coating then act as good binding agent, coating is had very high anti-wear performance.In addition, prepared with the method Coating has all advantages of powdery paints, such as reduces environmental pollution, saves the energy, has excellent endurance quality, and applies Material has very high utilization rate etc.;Meanwhile also with all advantages of super-hydrophobic coat, such as waterproof, antifouling, grease proofing, dust-proof, anti- Corruption etc., can be applied to road guardrail, building inside and outside wall, house ornamentation furred ceiling of metal material etc., it may also be used for aircraft, naval vessel, high ferro, The large-scale plant such as automobile surface, application field are wide.
(3) the hydrophobically modified particle in coating is firmly bonded after resin mixes with hydrophobically modified powder, during heating and melting Firmly, the resin that uppermost particle is cured is clung, and improves surface roughness to a certain extent.The silicon prepared based on the method Sol-gel modified SiO 2 powder and toner mixing hot melt solidify afterwards, obtained super-hydrophobic coat, by various ways Abrasion, such as finger friction are thousands of secondary, or after the polishing of long-time sand paper or abrasion instrument abrasion, coating surface is still super-hydrophobic, is connect Feeler is remained to reach more than 155 °, and water droplet roll angle is controlled below 10 °, shows excellent anti-wear performance.
(4) it is powder coating based on the coating prepared by the method, when being molded by electrostatic plastic spraying, avoids organic solvent The various unsafe factors brought, while also prevent the pollution that organic solvent is brought to environment;Simultaneously in construction application, no Need to adjust viscosity with seasonal variations, simplify constructing operation.
Brief description of the drawings
Fig. 1 is sample surface scan picture in embodiment 1;
Fig. 2 is the aspect graph that sample stands the μ L water droplets of surface 5 in air after 500 sand paper wear in embodiment 2;
Fig. 3 is the aspect graph that sample stands the μ L water droplets of surface 5 in air after 700 sand paper wear in embodiment 3;
Fig. 4 is sample coating surface macro morphology figure after 700 sand paper wear in embodiment 3;
Fig. 5 is the coating surface macro morphology figure of tinplate sample in embodiment.
Embodiment
Following examples further illustrate present disclosure, but should not be construed as limiting the invention.Without departing substantially from In the case of spirit and essence of the invention, the modification and replacement made to the inventive method, step or condition, the present invention is belonged to Scope.Unless otherwise specified, the conventional meanses that technological means used in embodiment is well known to those skilled in the art.
Embodiment 1
(1) preparation of hydrophobically modified powder:The Ludox SiO 2 powder being modified using silicon fluoride and TEOS is as thin Water modified powder, using absolute ethyl alcohol as solvent, water silica sol is added dropwise after adding ammoniacal liquor and deionized water, is added dropwise when being stirred Silicon fluoride and TEOS, dry and clay into power after stirring 24h, 10~50 μm of powder diameter;
(2) hydrophobically modified powder and resin-oatmeal blending:Resin uses the PTFE resin of solid powder, and mesh number is 250 mesh, will Toner is heated to after fusing point is allowed to melting, according to " hydrophobically modified powder:Resin=1:4 " mass ratio, add drainage powder And continue to stir, by melting extrusion, as being dried at 80 DEG C of baking oven, dried object tabletting, broken is finally pulverized, grain Footpath is 10~50 μm, is scattered in butyl acetate solution, the drop silicon fluorides of dropwise addition 3~4, ultrasonic 5 in placement ultrasonic instrument~ 10min;
(3) super-hydrophobic coat is prepared in substrate surface:The good solution of ultrasound is uniformly brushed at glass chip bottom with brush On, sample is brushed once;
(4) resin hot melt solidification:The sample brushed is placed and heated in baking oven, temperature is adjusted to 330 DEG C, and hardening time is 10~30min, sample is taken off into cooling after resin solidification is complete, you can obtain wearability super-hydrophobic surface coating.
The coating sample that embodiment 1 prepares is polished with 1200 mesh sand paper, counts the change of its roll angle, as a result such as Shown in table 1:
In the embodiment 1 of table 1 super-hydrophobic coat sample with Sandpapering number rolling angular data
Embodiment 2
(1) preparation of hydrophobically modified powder:The Ludox SiO 2 powder being modified using silicon fluoride and TEOS is as thin Water modified powder, using absolute ethyl alcohol as solvent, water silica sol is added dropwise after adding ammoniacal liquor and deionized water, is added dropwise when being stirred Silicon fluoride and TEOS, dry and clay into power after stirring 24h, 10~50 μm of powder diameter;
(2) hydrophobically modified powder and resin-oatmeal blending:Resin uses the TPU of solid powder, and mesh number is 800 mesh, toner is heated to after fusing point is allowed to melting, according to " hydrophobically modified powder:Resin=1:1 " mass ratio, addition Drainage powder simultaneously continues to stir, and by melting extrusion, as being dried at 80 DEG C of baking oven, dried object tabletting, broken is finally ground Cheng Fen, particle diameter are 10~50 μm, are scattered in butyl acetate solution, and 3~4 drop silicon fluorides are added dropwise, places in ultrasonic instrument and surpasses 5~10min of sound;
(3) super-hydrophobic coat is prepared in substrate surface:The good solution of ultrasound is uniformly brushed at glass chip bottom with brush On, sample is brushed once;
(4) resin hot melt solidification:The sample brushed is placed and heated in baking oven, temperature is adjusted to 152 DEG C, and hardening time is 10~30min, sample is taken off into cooling after resin solidification is complete, you can obtain wearability super-hydrophobic surface coating.
Fig. 2 stands the form of the μ L water droplets of surface 5 in air, sand paper model for the coating after 500 sand paper wear 1200 mesh, abrasion pressure 200g, horizontal and vertical each polishing 10cm is a circle.
The coating sample Sandpapering that embodiment 2 is prepared, counts the change of its roll angle, as a result such as the institute of table 2 Show:
In the embodiment 2 of table 2 super-hydrophobic coat sample with Sandpapering number rolling angular data
Embodiment 3
(1) preparation of hydrophobically modified powder:The Ludox SiO 2 powder being modified using silicon fluoride and TEOS is as thin Water modified powder, using absolute ethyl alcohol as solvent, water silica sol is added dropwise after adding ammoniacal liquor and deionized water, is added dropwise when being stirred Silicon fluoride and TEOS, dry and clay into power after stirring 24h, 10~50 μm of powder diameter;
(2) hydrophobically modified powder and resin-oatmeal blending:Resin uses a kind of polyester resin of solid powder, and mesh number is 500 mesh, toner is heated to after fusing point is allowed to melting, according to " hydrophobically modified powder:Resin=2:1 " mass ratio, addition Drainage powder simultaneously continues to stir, and by melting extrusion, as being dried at 80 DEG C of baking oven, dried object tabletting, broken is finally ground Cheng Fen, particle diameter are 10~50 μm, are scattered in butyl acetate solution, and 3~4 drop silicon fluorides are added dropwise, places in ultrasonic instrument and surpasses 5~10min of sound;
(3) super-hydrophobic coat is prepared in substrate surface:The good solution of ultrasound is uniformly brushed at glass chip bottom with brush On, sample is brushed once;
(4) resin hot melt solidification:The sample brushed is placed and heated in baking oven, temperature is adjusted to 200 DEG C, and hardening time is 10~30min, sample is taken off into cooling after resin solidification is complete, you can obtain wearability super-hydrophobic surface coating.
Fig. 3 stands the form of the μ L water droplets of surface 5 in air, sand paper model for the coating after 700 sand paper wear 1200 mesh, abrasion pressure 200g, horizontal and vertical each polishing 10cm is a circle.
Fig. 4 is coating coating surface macro morphology after 700 sand paper wear.
The coating surface macro morphology of Fig. 5 positions tinplate sample.
Table 4 is the rolling angular data that the coating is polished with abrasion instrument.Abrasion instrument wheel is rubber wheels, abrasion pressure position 250g。
The coating sample Sandpapering that embodiment 3 is prepared, counts the change of its roll angle, as a result such as the institute of table 3 Show:
In the embodiment 3 of table 3 super-hydrophobic coat sample with Sandpapering number rolling angular data
The rolling angular data that the floating coat sample of 4 embodiment of table 3 is polished with abrasion instrument

Claims (9)

1. a kind of super-hydrophobic powdery paints, it is characterised in that the coating includes hydrophobic powder and needs the resin-oatmeal of hot setting, dredges The mass ratio of pigment and resin-oatmeal is 1:1~4;Wherein, hydrophobic powder is the polytetrafluoroethylene (PTFE), polyvinylidene fluoride that particle diameter is 10~50 μm At least one of alkene, hydrophobically modified silica, hydrophobically modified titanium dioxide, hydrophobically modified CNT, carbon black, resin-oatmeal is Particle diameter is 10~50 μm and can be used at least one of epoxy or polyesters powder of electrostatic plastic spraying.
2. the preparation method of a kind of super-hydrophobic powdery paints described in claim 1, it is characterised in that methods described is will be hydrophobic Powder and resin-oatmeal are blended in proportion;Or again through melting stirring, extrusion, tabletting, broken, efflorescence process after being blended in proportion by both Prepare.
3. the preparation method of a kind of super-hydrophobic powdery paints according to claim 2, it is characterised in that methods described is specific For:
(1) powder is mixed:Hydrophobic powder is mixed with resin-oatmeal by proportioning, 5-10min is mixed in high-speed mixer;
(2) melting extrusion:Mixed-powder puts into double-screw agitator, in 120~140 DEG C of screw sleeve temperature, rotating speed 100~ Extruded under the conditions of 300r/m;
(3) tabletting and broken:The slurry of extrusion is directly cooled down with twin-roll machine and rolled to 1~3mm of thickness, length and width 3~5mm Irregular shape thin slice;
(4) efflorescence:Thin slice after broken is ground, sieving, sieve mesh number is 300 mesh, obtains super-hydrophobic powder.
4. application of the super-hydrophobic powdery paints in super-high wear-resistant super-hydrophobic coat is prepared described in claim 1.
5. application according to claim 4, it is characterised in that the coating is made by following methods:By super-hydrophobic powder Coating with organic solvent it is dispersed after be made into dispersion liquid, roller coat, brush or be sprayed at workpiece surface;Or directly pass through electrostatic Painting mode is coated on workpiece surface, is subsequently heated to more than solidification temperature, makes its melting, levelling, reaction film-forming, cooling Afterwards, you can obtain the coating with super-high wear-resistant and super-hydrophobicity;The organic solvent is ethanol, isopropanol, acetic acid At least one of butyl ester;Dispersion liquid concentration is 0.1g/mL~1g/mL.
6. application according to claim 5, it is characterised in that the solidification temperature is 150~330 DEG C, and hardening time is 10~30min.
7. application according to claim 5, it is characterised in that the input voltage of the electrostatic spraying mode is 220V, spray The output of rifle electrostatic is 10~100KV, and for powder 0.4~0.5MPa of air pressure, spray distance is 150~250mm.
8. application according to claim 5, it is characterised in that prepared using powdery paints solution roller coat, brushing or spraying The thickness of film is 10~200 μm;Coating thickness using electrostatic plastic spraying film forming is 40~120 μm.
9. any described coating of claim 4~8, it is characterised in that the coating includes super-hydrophobic powdery paints.
CN201710886318.8A 2017-09-27 2017-09-27 A kind of super-hydrophobic powdery paints and its preparation method and application Pending CN107652795A (en)

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