CN117820936A - Preparation method and application of diffuse reflection powder coating - Google Patents
Preparation method and application of diffuse reflection powder coating Download PDFInfo
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- CN117820936A CN117820936A CN202410250847.9A CN202410250847A CN117820936A CN 117820936 A CN117820936 A CN 117820936A CN 202410250847 A CN202410250847 A CN 202410250847A CN 117820936 A CN117820936 A CN 117820936A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 45
- 238000000576 coating method Methods 0.000 title claims abstract description 41
- 239000011248 coating agent Substances 0.000 title claims abstract description 40
- 239000000843 powder Substances 0.000 title claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 67
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000003607 modifier Substances 0.000 claims abstract description 32
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims abstract description 24
- 239000000049 pigment Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 70
- 238000002156 mixing Methods 0.000 claims description 42
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 31
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 29
- 238000011282 treatment Methods 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 24
- 238000000498 ball milling Methods 0.000 claims description 19
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 18
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 18
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 claims description 15
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 239000004115 Sodium Silicate Substances 0.000 claims description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 14
- 239000001509 sodium citrate Substances 0.000 claims description 13
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 13
- 239000004593 Epoxy Substances 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 9
- 230000004048 modification Effects 0.000 claims description 9
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 9
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 9
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 5
- 239000003973 paint Substances 0.000 abstract 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 235000012222 talc Nutrition 0.000 description 2
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The invention relates to the technical field of paint, and in particular discloses a preparation method and application of diffuse reflection powder paint, wherein the preparation method comprises the following steps: weighing raw materials: 10-15 parts of bisphenol A epoxy resin, 3-5 parts of curing agent, 2-5 parts of pigment, 8-12 parts of whisker modified double-regulating modifier, 5-9 parts of flaky talcum powder regulator and 1-3 parts of flatting agent. The diffuse reflection powder coating is prepared by matching bisphenol A epoxy resin, a curing agent, pigment and a leveling agent with a whisker-modified double-regulation modifier and a flaky talcum powder modifier, and the bisphenol A epoxy resin, the curing agent, the pigment and the leveling agent are mutually matched, mutually regulated and synergistic, so that the reflection performance and the wear resistance of the obtained coating can be coordinately improved, and the acid corrosion resistance stability of the product is obviously improved.
Description
Technical Field
The invention relates to the technical field of powder coatings, in particular to a preparation method and application of a diffuse reflection powder coating.
Background
The powder coating is mainly solid powder coating composed of 5 parts of resin, curing agent, pigment, filler, auxiliary agent and the like. The diffuse reflection coating formed by the diffuse reflection coating can homogenize light and eliminate glare or light spots, so that the diffuse reflection coating is widely applied to components such as display back plates and LED lamps, and in the prior art, the powder coating has general reflectivity performance on diffuse reflection performance, so that in order to improve the reflectivity, the wear resistance of a product is reduced, the reflectivity and the wear resistance of the product are difficult to coordinate and improve, the product is placed under the acid corrosion condition, the stability of the product is poor, and the use efficiency of the product is limited.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method and application of diffuse reflection powder coating to solve the problems in the prior art.
The invention solves the technical problems by adopting the following technical scheme:
the invention provides a preparation method of a diffuse reflection powder coating, which comprises the following steps:
step one: weighing raw materials: 10-15 parts of bisphenol A epoxy resin, 3-5 parts of curing agent, 2-5 parts of pigment, 8-12 parts of whisker modified double-regulating modifier, 5-9 parts of flaky talcum powder regulator and 1-3 parts of flatting agent;
step two: adding the raw materials in the first step into a stirrer, and stirring and uniformly mixing to obtain a first mixing agent;
step three: feeding the first mixing agent into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 100-102 ℃, and the extrusion is finished to obtain a second mixing agent;
step four: grinding the second mixture for 1-2h at a rotating speed of 1000-1500r/min, and sieving to obtain the diffuse reflection powder coating.
Preferably, the bisphenol a epoxy resin has an epoxy value of 0.1 to 0.12; the softening point of bisphenol A epoxy resin is 80-90 ℃; the curing agent is hydroxyalkylamide; the pigment is one of iron oxide red, iron oxide yellow and carbon black; the leveling agent is glycidyl acrylate copolymer with epoxy value of 0.05-0.12.
Preferably, the preparation method of the whisker-modified double-regulating modifier comprises the following steps:
s01: adding 2-5 parts by weight of a silane coupling agent KH560 into 10-15 parts by weight of an ethanol solvent, then adding 1-3 parts by weight of glycolic acid and 2-4 parts by weight of lanthanum chloride solution, and stirring and uniformly mixing to obtain a pre-mixed solution;
s02: preheating silicon carbide whisker at 55-60 ℃ for 5-10min, adding the silicon carbide whisker into preset liquid which is 4-5 times of the total amount of the silicon carbide whisker, performing ultrasonic dispersion treatment, and washing and drying after ultrasonic treatment to obtain a preset silicon carbide whisker agent;
s03: mixing the preset silicon carbide whisker agent and the coordination liquid according to the weight ratio of 5:2, performing ball milling treatment at the ball milling rotating speed of 1000-1500r/min for 1-2h, and performing water washing and drying after ball milling to obtain the double-regulation modifier based on whisker modification.
Preferably, the lanthanum chloride solution has a mass fraction of 4-7%.
Preferably, the ultrasonic power of the ultrasonic dispersion treatment is 300-350W, and the ultrasonic time is 1-2h.
Preferably, the preparation method of the coordination liquid comprises the following steps:
adding 3-6 parts by weight of nano titanium dioxide and 1-3 parts by weight of yttrium nitrate solution into 10-15 parts by weight of sodium citrate solution, then adding 2-4 parts by weight of sodium dodecyl benzene sulfonate and 0.25-0.45 part by weight of nano silica sol, and stirring and uniformly mixing to obtain a coordination solution.
Preferably, the yttrium nitrate solution has a mass fraction of 2-5%; the mass fraction of the sodium citrate solution is 10-15%.
Preferably, the preparation method of the flaky talcum powder regulator comprises the following steps:
s11: the preparation method comprises the steps of firstly placing flaky talcum powder into hydrochloric acid solution with the mass fraction of 5% and the total amount of the flaky talcum powder being 2-5 times, uniformly stirring, and then washing and drying to obtain pretreated flaky talcum powder;
s12: immersing the pretreated flaky talcum powder into a sodium silicate solution which is 3-5 times of the total amount of the pretreated flaky talcum powder for immersing treatment, wherein the immersing pressure is 10-15MPa, the immersing time is 1-2h, and the flaky talcum powder regulator is obtained after immersing, washing and drying.
Preferably, the mass fraction of the sodium silicate solution is 10-15%.
The invention also provides an application of the preparation method of the diffuse reflection powder coating on the display backboard.
Compared with the prior art, the invention has the following beneficial effects:
the diffuse reflection powder coating is prepared from bisphenol A epoxy resin, a curing agent, pigment and a leveling agent, wherein the bisphenol A epoxy resin, the curing agent, the pigment and the leveling agent are matched with a whisker-modified double-regulation improver and a flaky talcum powder regulator, and the bisphenol A epoxy resin, the curing agent, the pigment and the leveling agent are mutually matched and regulated to mutually synergize, the reflection performance and the wear resistance of the obtained coating can be improved in a coordinated manner, the acid corrosion resistance stability of the product is obviously improved, the whisker-modified double-regulation improver takes silicon carbide whiskers as a matrix, the silane coupling agent KH560, glycolic acid and lanthanum chloride solution raw materials are adopted for carrying out the preset improvement, the activity efficiency and the interfacial property of the whiskers are optimized, and then the coordination liquid obtained by the coordination of nano titanium dioxide, yttrium nitrate solution, sodium citrate solution, sodium dodecyl benzene sulfonate and nano silica sol raw materials is matched, so that the flaky talcum powder in the flaky talcum powder regulator can be better regulated with flaky talcum powder in the flaky structure, the flaky talcum powder is mutually matched with the whisker structure, the flaky structure is improved, the system structure performance is further improved.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The preparation method of the diffuse reflection powder coating comprises the following steps:
step one: weighing raw materials: 10-15 parts of bisphenol A epoxy resin, 3-5 parts of curing agent, 2-5 parts of pigment, 8-12 parts of whisker modified double-regulating modifier, 5-9 parts of flaky talcum powder regulator and 1-3 parts of flatting agent;
step two: adding the raw materials in the first step into a stirrer, and stirring and uniformly mixing to obtain a first mixing agent;
step three: feeding the first mixing agent into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 100-102 ℃, and the extrusion is finished to obtain a second mixing agent;
step four: grinding the second mixture for 1-2h at a rotating speed of 1000-1500r/min, and sieving to obtain the diffuse reflection powder coating.
The epoxy value of the bisphenol A epoxy resin of the embodiment is 0.1-0.12; the softening point of bisphenol A epoxy resin is 80-90 ℃; the curing agent is hydroxyalkylamide; the pigment is one of iron oxide red, iron oxide yellow and carbon black; the leveling agent is glycidyl acrylate copolymer with epoxy value of 0.05-0.12.
The preparation method of the whisker-modified double-regulating modifier comprises the following steps:
s01: adding 2-5 parts by weight of a silane coupling agent KH560 into 10-15 parts by weight of an ethanol solvent, then adding 1-3 parts by weight of glycolic acid and 2-4 parts by weight of lanthanum chloride solution, and stirring and uniformly mixing to obtain a pre-mixed solution;
s02: preheating silicon carbide whisker at 55-60 ℃ for 5-10min, adding the silicon carbide whisker into preset liquid which is 4-5 times of the total amount of the silicon carbide whisker, performing ultrasonic dispersion treatment, and washing and drying after ultrasonic treatment to obtain a preset silicon carbide whisker agent;
s03: mixing the preset silicon carbide whisker agent and the coordination liquid according to the weight ratio of 5:2, performing ball milling treatment at the ball milling rotating speed of 1000-1500r/min for 1-2h, and performing water washing and drying after ball milling to obtain the double-regulation modifier based on whisker modification.
The mass fraction of the lanthanum chloride solution in the embodiment is 4-7%.
The ultrasonic power of the ultrasonic dispersion treatment of the embodiment is 300-350W, and the ultrasonic time is 1-2h.
The preparation method of the coordination liquid in the embodiment comprises the following steps:
adding 3-6 parts by weight of nano titanium dioxide and 1-3 parts by weight of yttrium nitrate solution into 10-15 parts by weight of sodium citrate solution, then adding 2-4 parts by weight of sodium dodecyl benzene sulfonate and 0.25-0.45 part by weight of nano silica sol, and stirring and uniformly mixing to obtain a coordination solution.
The mass fraction of the yttrium nitrate solution in the embodiment is 2-5%; the mass fraction of the sodium citrate solution is 10-15%.
The preparation method of the flaky talcum powder regulator in the embodiment comprises the following steps:
s11: the preparation method comprises the steps of firstly placing flaky talcum powder into hydrochloric acid solution with the mass fraction of 5% and the total amount of the flaky talcum powder being 2-5 times, uniformly stirring, and then washing and drying to obtain pretreated flaky talcum powder;
s12: immersing the pretreated flaky talcum powder into a sodium silicate solution which is 3-5 times of the total amount of the pretreated flaky talcum powder for immersing treatment, wherein the immersing pressure is 10-15MPa, the immersing time is 1-2h, and the flaky talcum powder regulator is obtained after immersing, washing and drying.
The mass fraction of the sodium silicate solution of the embodiment is 10-15%.
The preparation method of the diffuse reflection powder coating is applied to a display backboard.
Example 1
The preparation method of the diffuse reflection powder coating comprises the following steps:
step one: weighing raw materials: 10 parts of bisphenol A epoxy resin, 3 parts of curing agent, 2 parts of pigment, 8 parts of whisker-modified double-regulating modifier, 5 parts of flaky talcum powder modifier and 1 part of flatting agent;
step two: adding the raw materials in the first step into a stirrer, and stirring and uniformly mixing to obtain a first mixing agent;
step three: feeding the first mixing agent into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 100 ℃, and the extrusion is finished to obtain a second mixing agent;
step four: and grinding the second mixture for 1h at a rotating speed of 1000r/min, and screening to obtain the diffuse reflection powder coating.
The bisphenol a epoxy resin of this example has an epoxy value of 0.1; bisphenol A epoxy resin has a softening point of 80 ℃; the curing agent is hydroxyalkylamide; the pigment is iron oxide red; the leveling agent is glycidyl acrylate copolymer with an epoxy value of 0.05.
The preparation method of the whisker-modified double-regulating modifier comprises the following steps:
s01: adding 2 parts by weight of a silane coupling agent KH560 into 10 parts by weight of an ethanol solvent, then adding 1 part by weight of glycolic acid and 2 parts by weight of lanthanum chloride solution, and stirring and uniformly mixing to obtain a pre-mixed solution;
s02: preheating silicon carbide whisker at 55 ℃ for 5min, adding the silicon carbide whisker into preset liquid which is 4 times of the total amount of the silicon carbide whisker, carrying out ultrasonic dispersion treatment, and washing and drying after ultrasonic treatment to obtain a preset silicon carbide whisker agent;
s03: and (3) mixing the preset silicon carbide whisker agent and the coordination liquid according to a weight ratio of 5:2, performing ball milling at a ball milling rotating speed of 1000r/min for 1h, performing water washing and drying after ball milling is finished, and obtaining the double-regulation modifier based on whisker modification.
The lanthanum chloride solution of this example was 4% by mass.
The ultrasonic power of the ultrasonic dispersion treatment in this embodiment was 300W, and the ultrasonic time was 1h.
The preparation method of the coordination liquid in the embodiment comprises the following steps:
adding 3 parts by weight of nano titanium dioxide and 1 part by weight of yttrium nitrate solution into 10 parts by weight of sodium citrate solution, then adding 2 parts by weight of sodium dodecyl benzene sulfonate and 0.255 part by weight of nano silica sol, and stirring and uniformly mixing to obtain a coordination solution.
The mass fraction of the yttrium nitrate solution in the embodiment is 2%; the mass fraction of the sodium citrate solution is 10%.
The preparation method of the flaky talcum powder regulator in the embodiment comprises the following steps:
s11: the preparation method comprises the steps of firstly placing flaky talcum powder into hydrochloric acid solution with mass fraction of 5% and 2 times of the total amount of the flaky talcum powder, uniformly stirring, and then washing and drying to obtain pretreated flaky talcum powder;
s12: immersing the pretreated flaky talcum powder into a sodium silicate solution which is 3 times of the total amount of the pretreated flaky talcum powder for immersing treatment, wherein the immersing pressure is 10MPa, the immersing time is 1h, and the flaky talcum powder regulator is obtained after immersing, washing and drying.
The mass fraction of the sodium silicate solution of this example was 10%.
The preparation method of the diffuse reflection powder coating is applied to a display backboard.
Example 2
The preparation method of the diffuse reflection powder coating comprises the following steps:
step one: weighing raw materials: 15 parts of bisphenol A epoxy resin, 5 parts of curing agent, 5 parts of pigment, 12 parts of whisker-modified double-regulating modifier, 9 parts of flaky talcum powder modifier and 3 parts of leveling agent;
step two: adding the raw materials in the first step into a stirrer, and stirring and uniformly mixing to obtain a first mixing agent;
step three: feeding the first mixing agent into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 102 ℃, and the extrusion is finished to obtain a second mixing agent;
step four: and grinding the second mixture for 2 hours at a rotating speed of 1500r/min, and screening to obtain the diffuse reflection powder coating.
The bisphenol a epoxy resin of this example has an epoxy value of 0.12; bisphenol A epoxy resin has a softening point of 90 ℃; the curing agent is hydroxyalkylamide; the pigment is iron oxide yellow; the leveling agent is glycidyl acrylate copolymer with an epoxy value of 0.12.
The preparation method of the whisker-modified double-regulating modifier comprises the following steps:
s01: adding 5 parts by weight of a silane coupling agent KH560 into 15 parts by weight of an ethanol solvent, then adding 3 parts by weight of glycolic acid and 4 parts by weight of lanthanum chloride solution, and stirring and uniformly mixing to obtain a pre-mixed solution;
s02: preheating silicon carbide whisker at 60 ℃ for 10min, adding the silicon carbide whisker into preset liquid which is 5 times of the total amount of the silicon carbide whisker, carrying out ultrasonic dispersion treatment, and washing and drying after ultrasonic treatment to obtain a preset silicon carbide whisker agent;
s03: and (3) mixing the preset silicon carbide whisker agent and the coordination liquid according to a weight ratio of 5:2, performing ball milling at a ball milling rotating speed of 1500r/min for 2 hours, performing water washing and drying after ball milling, and obtaining the double-regulation modifier based on whisker modification.
The lanthanum chloride solution of this example was 7% by mass.
The ultrasonic power of the ultrasonic dispersion treatment in this embodiment is 350W, and the ultrasonic time is 2h.
The preparation method of the coordination liquid in the embodiment comprises the following steps:
adding 6 parts by weight of nano titanium dioxide and 3 parts by weight of yttrium nitrate solution into 15 parts by weight of sodium citrate solution, then adding 4 parts by weight of sodium dodecyl benzene sulfonate and 0.45 part by weight of nano silica sol, and stirring and uniformly mixing to obtain a coordination solution.
The mass fraction of the yttrium nitrate solution in the embodiment is 5%; the mass fraction of the sodium citrate solution is 15%.
The preparation method of the flaky talcum powder regulator in the embodiment comprises the following steps:
s11: the preparation method comprises the steps of firstly placing flaky talcum powder into 5% hydrochloric acid solution with the mass fraction of 5 times of the total amount of the flaky talcum powder, uniformly stirring, and then washing and drying to obtain pretreated flaky talcum powder;
s12: immersing the pretreated flaky talcum powder into a sodium silicate solution which is 5 times of the total amount of the pretreated flaky talcum powder for immersing treatment, wherein the immersing pressure is 15MPa, the immersing time is 2 hours, and after immersing, washing and drying are carried out to obtain the flaky talcum powder regulator.
The mass fraction of the sodium silicate solution of this example was 15%.
The preparation method of the diffuse reflection powder coating is applied to a display backboard.
Example 3
The preparation method of the diffuse reflection powder coating comprises the following steps:
step one: weighing raw materials: 12.5 parts of bisphenol A epoxy resin, 4 parts of curing agent, 3.5 parts of pigment, 10 parts of whisker modified double-regulating modifier, 7 parts of flaky talcum powder regulator and 2 parts of flatting agent;
step two: adding the raw materials in the first step into a stirrer, and stirring and uniformly mixing to obtain a first mixing agent;
step three: feeding the first mixing agent into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 101 ℃, and the extrusion is finished to obtain a second mixing agent;
step four: and grinding the second mixture for 1.5 hours at the rotating speed of 1250r/min, and then sieving to obtain the diffuse reflection powder coating.
The bisphenol a epoxy resin of this example has an epoxy value of 0.11; bisphenol a epoxy resin has a softening point of 85 ℃; the curing agent is hydroxyalkylamide; the pigment is iron oxide red; the leveling agent is glycidyl acrylate copolymer with an epoxy value of 0.07.
The preparation method of the whisker-modified double-regulating modifier comprises the following steps:
s01: adding 3.5 parts by weight of a silane coupling agent KH560 into 12.5 parts by weight of an ethanol solvent, then adding 2 parts by weight of glycolic acid and 3 parts by weight of a lanthanum chloride solution, and stirring and uniformly mixing to obtain a pre-mixed solution;
s02: preheating silicon carbide whisker at 57 ℃ for 7.5min, adding the silicon carbide whisker into preset liquid which is 4.5 times of the total amount of the silicon carbide whisker, performing ultrasonic dispersion treatment, and after ultrasonic treatment, washing and drying to obtain a preset silicon carbide whisker agent;
s03: and (3) mixing the preset silicon carbide whisker agent and the coordination liquid according to a weight ratio of 5:2, performing ball milling treatment, wherein the ball milling rotating speed is 1250r/min, the ball milling time is 1.5h, and performing water washing and drying after ball milling is finished to obtain the double-regulation modifier based on whisker modification.
The lanthanum chloride solution of this example was 5.5% by mass.
The ultrasonic power of the ultrasonic dispersion treatment of this example was 325W and the ultrasonic time was 1.5h.
The preparation method of the coordination liquid in the embodiment comprises the following steps:
adding 4.5 parts by weight of nano titanium dioxide and 2 parts by weight of yttrium nitrate solution into 12.5 parts by weight of sodium citrate solution, then adding 3 parts by weight of sodium dodecyl benzene sulfonate and 0.30 part by weight of nano silica sol, and stirring and uniformly mixing to obtain a coordination solution.
The mass fraction of the yttrium nitrate solution in the embodiment is 3.5%; the mass fraction of the sodium citrate solution is 12.5%.
The preparation method of the flaky talcum powder regulator in the embodiment comprises the following steps:
s11: the preparation method comprises the steps of firstly placing flaky talcum powder into hydrochloric acid solution with the mass fraction of 5% and the total amount of 3.5 times of the flaky talcum powder, uniformly stirring, and then washing and drying to obtain pretreated flaky talcum powder;
s12: immersing the pretreated flaky talcum powder into a sodium silicate solution which is 4 times of the total amount of the pretreated flaky talcum powder for immersing treatment, wherein the immersing pressure is 12.5MPa, the immersing time is 1.5 hours, and the flaky talcum powder regulator is obtained after immersing, washing and drying.
The mass fraction of the sodium silicate solution of this example was 12.5%.
The preparation method of the diffuse reflection powder coating is applied to a display backboard.
Comparative example 1.
The difference from example 3 is that no twin modifier based on whisker modification was added.
Comparative example 2.
The difference from example 3 is that no preconditioning liquid treatment is used in the preparation of the dual modifier based on whisker modification.
Comparative example 3.
Unlike example 3, no glycolic acid or lanthanum chloride solution was added to the pre-mixed solution.
Comparative example 4.
Unlike example 3, no conditioning liquid treatment was used in the preparation of the dual modifier based on whisker modification.
Comparative example 5.
The difference from example 3 is that no nano titanium dioxide or yttrium nitrate solution is added into the coordination solution.
Comparative example 6.
The difference from example 3 is that sodium dodecyl benzene sulfonate and nano silica sol are not added into the coordination liquid.
Comparative example 7.
Unlike example 3, no platy talc modifier was added.
Comparative example 8.
The difference from example 3 is that the flaky talc modifier is not immersed in a sodium silicate solution.
The products of examples 1-3 and comparative examples 1-8 were coated on a substrate, tested for their reflective and abrasion resistance properties, and then placed under 2% hydrochloric acid corrosion conditions for 12 hours to test for acid corrosion resistance properties; the performance test is as follows:
from examples 1-3 and comparative examples 1-8, it can be seen that the reflectivity and wear resistance of example 3 of the present invention can be improved in a coordinated manner, and the product has excellent performance stability under the acid corrosion condition;
the product of the invention is not added with one of a whisker modified double-regulation modifier and a flaky talcum powder regulator, the performance of the product has obvious trend of deterioration, only the two components are adopted to cooperate together, and the performance effect of the product is most obvious;
the preparation of the whisker-modified double-regulating modifier is carried out without adopting pre-regulating liquid treatment, without adding glycolic acid and lanthanum chloride solution into the pre-regulating liquid, without adopting coordination liquid treatment, without adding nano titanium dioxide and yttrium nitrate solution into the coordination liquid, without adding sodium dodecyl benzene sulfonate and nano silica sol into the coordination liquid, the performance of the product is in a trend of deterioration, the performance effect of the product is most obvious only by adopting the coordination liquid prepared by adopting the method to match with the whisker-modified double-regulating modifier obtained by adopting the pre-regulating liquid treatment of the invention, the effect of the product is not as obvious as that of the invention by adopting other methods, meanwhile, the performance of the product is in a trend of deterioration by adopting the tablet talcum powder modifier obtained by adopting the specific sodium silicate solution immersed treatment.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The preparation method of the diffuse reflection powder coating is characterized by comprising the following steps of:
step one: weighing raw materials: 10-15 parts of bisphenol A epoxy resin, 3-5 parts of curing agent, 2-5 parts of pigment, 8-12 parts of whisker modified double-regulating modifier, 5-9 parts of flaky talcum powder regulator and 1-3 parts of flatting agent;
step two: adding the raw materials in the first step into a stirrer, and stirring and uniformly mixing to obtain a first mixing agent;
step three: feeding the first mixing agent into a double-screw extruder for melt extrusion, wherein the extrusion temperature is 100-102 ℃, and the extrusion is finished to obtain a second mixing agent;
step four: grinding the second mixture for 1-2h at a rotating speed of 1000-1500r/min, and sieving to obtain the diffuse reflection powder coating.
2. The method for preparing a diffuse reflection powder coating according to claim 1, wherein the bisphenol a epoxy resin has an epoxy value of 0.1 to 0.12; the softening point of bisphenol A epoxy resin is 80-90 ℃; the curing agent is hydroxyalkylamide; the pigment is one of iron oxide red, iron oxide yellow and carbon black; the leveling agent is glycidyl acrylate copolymer with epoxy value of 0.05-0.12.
3. The preparation method of the diffuse reflection powder coating according to claim 1, wherein the preparation method of the whisker-modified double-regulating modifier comprises the following steps:
s01: adding 2-5 parts by weight of a silane coupling agent KH560 into 10-15 parts by weight of an ethanol solvent, then adding 1-3 parts by weight of glycolic acid and 2-4 parts by weight of lanthanum chloride solution, and stirring and uniformly mixing to obtain a pre-mixed solution;
s02: preheating silicon carbide whisker at 55-60 ℃ for 5-10min, adding the silicon carbide whisker into preset liquid which is 4-5 times of the total amount of the silicon carbide whisker, performing ultrasonic dispersion treatment, and washing and drying after ultrasonic treatment to obtain a preset silicon carbide whisker agent;
s03: mixing the preset silicon carbide whisker agent and the coordination liquid according to the weight ratio of 5:2, performing ball milling treatment at the ball milling rotating speed of 1000-1500r/min for 1-2h, and performing water washing and drying after ball milling to obtain the double-regulation modifier based on whisker modification.
4. A method for preparing a diffuse reflection powder coating according to claim 3, wherein the lanthanum chloride solution has a mass fraction of 4-7%.
5. A method for preparing a diffuse reflection powder coating according to claim 3, wherein the ultrasonic power of the ultrasonic dispersion treatment is 300-350W and the ultrasonic time is 1-2h.
6. A method for preparing a diffuse reflective powder coating according to claim 3, wherein the method for preparing the coordinating liquid comprises the following steps:
adding 3-6 parts by weight of nano titanium dioxide and 1-3 parts by weight of yttrium nitrate solution into 10-15 parts by weight of sodium citrate solution, then adding 2-4 parts by weight of sodium dodecyl benzene sulfonate and 0.25-0.45 part by weight of nano silica sol, and stirring and uniformly mixing to obtain a coordination solution.
7. The method for preparing a diffuse reflection powder coating according to claim 6, wherein the mass fraction of the yttrium nitrate solution is 2-5%; the mass fraction of the sodium citrate solution is 10-15%.
8. The method for preparing the diffuse reflection powder coating according to claim 1, wherein the preparation method of the flaky talcum powder regulator comprises the following steps:
s11: the preparation method comprises the steps of firstly placing flaky talcum powder into hydrochloric acid solution with the mass fraction of 5% and the total amount of the flaky talcum powder being 2-5 times, uniformly stirring, and then washing and drying to obtain pretreated flaky talcum powder;
s12: immersing the pretreated flaky talcum powder into a sodium silicate solution which is 3-5 times of the total amount of the pretreated flaky talcum powder for immersing treatment, wherein the immersing pressure is 10-15MPa, the immersing time is 1-2h, and the flaky talcum powder regulator is obtained after immersing, washing and drying.
9. The method for preparing the diffuse reflection powder coating according to claim 8, wherein the mass fraction of the sodium silicate solution is 10-15%.
10. Use of a method for the preparation of a diffusely reflective powder coating as claimed in any one of claims 1 to 9, in a display back panel.
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