CN116694218A - Matte powder coating for perfume display rack and preparation method and application thereof - Google Patents
Matte powder coating for perfume display rack and preparation method and application thereof Download PDFInfo
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- CN116694218A CN116694218A CN202310849579.8A CN202310849579A CN116694218A CN 116694218 A CN116694218 A CN 116694218A CN 202310849579 A CN202310849579 A CN 202310849579A CN 116694218 A CN116694218 A CN 116694218A
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- polyester resin
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- 238000000576 coating method Methods 0.000 title claims abstract description 57
- 239000011248 coating agent Substances 0.000 title claims abstract description 50
- 239000000843 powder Substances 0.000 title claims abstract description 50
- 239000002304 perfume Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 67
- 229920001225 polyester resin Polymers 0.000 claims description 62
- 239000004645 polyester resin Substances 0.000 claims description 62
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 60
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 46
- 239000012948 isocyanate Substances 0.000 claims description 31
- 150000002513 isocyanates Chemical class 0.000 claims description 31
- 239000002518 antifoaming agent Substances 0.000 claims description 26
- 239000000945 filler Substances 0.000 claims description 26
- 244000028419 Styrax benzoin Species 0.000 claims description 23
- 235000000126 Styrax benzoin Nutrition 0.000 claims description 23
- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 23
- 229960002130 benzoin Drugs 0.000 claims description 23
- 235000019382 gum benzoic Nutrition 0.000 claims description 23
- 239000000049 pigment Substances 0.000 claims description 23
- 239000001993 wax Substances 0.000 claims description 21
- 230000009477 glass transition Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 150000001408 amides Chemical group 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910052664 nepheline Inorganic materials 0.000 claims description 4
- 239000010434 nepheline Substances 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims 4
- 238000012360 testing method Methods 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 239000013530 defoamer Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000006224 matting agent Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of powder coating, in particular to a matte powder coating for a perfume display rack, and a preparation method and application thereof.
Description
Technical Field
The invention relates to the technical field of powder coatings, in particular to a matte powder coating for a perfume display rack and a preparation method and application thereof.
Background
The powder coating is 100% solid powder without organic solvent, does not use solvent or water as dispersion medium during coating, uses air as dispersion medium, can be uniformly coated on the surface of a workpiece (perfume display rack), and forms a coating film layer structure with special functions after heating, and is widely applied to various fields of production and life at present, such as: food, medical equipment, daily necessities, and the like.
The matte powder coating is one of powder coatings, and is classified into an indoor matte powder coating and an outdoor matte powder coating according to application environments. Indoor matte powder coatings are typically prepared by adding a chemical matting agent XG603-1A and outdoor matte powder coatings are typically prepared by adding an acrylic matting agent T-308. However, with the lankoog perfume resistance test for the two types of matt powder coatings described above, it was found that: the coating is extremely easy to soften, lose light, change color and have poor adhesive force, and the coating has poor scratch resistance, wear resistance, hardness, mechanical property and the like.
Based on the characteristics, the researcher combines practical production and research of the powder coating, combines the defects of the matt powder coating in the aspect of the lankoog perfume resistance in the prior art, makes research on the powder coating for the perfume display rack, and provides a new thought for the powder coating for the perfume display rack.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a matte powder coating for a perfume display rack, and a preparation method and application thereof.
The method is realized by the following technical scheme:
the invention provides a matte powder coating for a perfume display rack, which comprises, by weight, 36-50 parts of hydroxyl polyester resin, 20-30 parts of isocyanate curing agent, 1-1.2 parts of leveling agent, 0.3-0.5 part of benzoin, 0.3-0.5 part of hardening wax, 0.3-0.5 part of defoaming agent, 30-37 parts of filler and 1.4-1.6 parts of pigment.
Preferably, the raw material components comprise 36.9 parts by weight of hydroxyl polyester resin, 23 parts by weight of isocyanate curing agent, 1.2 parts by weight of leveling agent, 0.4 part by weight of benzoin, 0.3 part by weight of hardening wax, 0.3 part by weight of defoaming agent, 36.4 parts by weight of filler and 1.5 parts by weight of pigment.
Preferably, the hydroxyl polyester resin is formed by mixing high hydroxyl polyester resin and low hydroxyl polyester resin according to the mass ratio of 27-35:9-15.
More preferably, the hydroxyl polyester resin is formed by mixing high hydroxyl polyester resin and low hydroxyl polyester resin according to the mass ratio of 27.8:9.1.
Preferably, the hydroxyl value of the Gao Qiangji polyester resin is from 280 to 320mgKOH/g and the hydroxyl value of the low-hydroxyl polyester resin is from 35 to 45mgKOH/g.
Preferably, the glass transition temperature of the Gao Qiangji polyester resin is more than or equal to 60 ℃, the softening point is 100-120 ℃, and the viscosity is 320-500 Pa.s at the temperature of 165 ℃; and/or the glass transition temperature of the low hydroxyl polyester resin is more than or equal to 64 ℃, the softening point is 115-125 ℃, and the viscosity is 280-480 Pa.s at 165 ℃.
Preferably, the isocyanate curing agent has an NCO equivalent weight of 275-285g/mol.
Preferably, the leveling agent is an acrylic leveling agent and/or a polyether leveling agent; and/or the defoaming agent is an amide defoaming agent; and/or the filler is nepheline with a median particle size of 4-6 μm.
The second object of the invention is to provide a preparation method of the matt powder coating for the perfume display rack, which comprises the following steps:
(1) Sequentially adding hydroxyl polyester resin, isocyanate curing agent, leveling agent, benzoin, hardening wax, defoaming agent, filler and pigment into a stirrer for stirring and premixing to obtain premix;
(2) Melting and extruding the premix, and cooling and crushing to obtain a sheet material;
(3) Grinding the sheet material by a vertical mill, and sieving with a 180-mesh sieve to obtain the product.
The invention further provides application of the matte powder coating for the perfume display rack in the coating of the perfume display rack.
Compared with the prior art, the invention has the technical effects that:
the invention adopts hydroxyl polyester resin, isocyanate curing agent, flatting agent, benzoin, hardening wax, defoamer, filler and pigment as raw materials to realize the mutual matching of the hydroxyl polyester resin and the isocyanate curing agent, and utilizes hydroxyl polyester resin with high and low hydroxyl value to compound, so that after the hydroxyl polyester resin is prepared into powder coating, the powder coating can pass perfume-resistant test for 240 hours, and the conditions of discoloration, light loss, film softening, low hardness and adhesive force reduction are not found, thus the powder coating has excellent perfume-resistant performance.
The invention has the advantages of easily available raw materials, low manufacturing cost and easy industrialized popularization and implementation.
Drawings
FIG. 1 is a photograph showing the perfume resistance test result of the powder coating material of inventive example 1.
FIG. 2 is a photograph showing the perfume resistance test results of the powder coating material obtained in inventive example 2.
FIG. 3 is a photograph showing the perfume resistance test result of the powder coating material of inventive example 3.
FIG. 4 is a report of the electrostatic coating film detection of the powder coating material obtained in inventive example 3.
Detailed Description
The technical scheme of the present invention is further defined below in conjunction with the specific embodiments, but the scope of the claimed invention is not limited to the description.
In certain embodiments, a method of preparing a matte powder coating for a perfume display stand comprises the steps of:
(1) Sequentially adding hydroxyl polyester resin, isocyanate curing agent, leveling agent, benzoin, hardening wax, defoaming agent, filler and pigment into a stirrer for stirring and premixing to obtain premix;
(2) Melting and extruding the premix, and cooling and crushing to obtain a sheet material;
(3) Grinding the sheet material by a vertical mill, and sieving with a 180-mesh sieve to obtain the product.
In the step (1), raw materials are sequentially put into a stirrer, and are stirred and premixed for 170-190s at a stirring speed of 1200r/min, for example: 170s,180s,190s, etc., to obtain a premix.
In the step (2), the premix is put into a screw extruder, the rotation speed of the screw is controlled to be 45Hz, the melt extrusion is carried out, the extrusion temperature is 100-110 ℃, for example, 100 ℃, 105 ℃, 110 ℃ and the like, and the mixture is cooled and crushed to prepare the tablet.
In the step (3), the sheet materials are put into a vertical mill for grinding, and the main grinding rotating speed of the vertical mill is controlled to be 50Hz, and the auxiliary grinding rotating speed is controlled to be 38Hz.
The powder coating prepared by the preparation method can be sprayed by using an electrostatic gun.
In addition, the present inventors have added alumina to the slurry in an amount of 0.2% by mass of the slurry when grinding the slurry with a vertical mill, thereby avoiding agglomeration and improving the dispersibility of the powder coating from the vertical mill.
Aiming at the defects that the service life of a traditional powder coating is shortened, the using effect is reduced, the perfume display rack is damaged and cannot be reused, and the like caused by poor perfume resistance of the traditional powder coating, the invention develops the research of the powder coating suitable for the perfume display rack.
In some embodiments, the matte powder coating for the perfume display stand comprises, by weight, 36-50 parts of hydroxyl polyester resin, 20-30 parts of isocyanate curing agent, 1-1.2 parts of leveling agent, 0.3-0.5 part of benzoin, 0.3-0.5 part of hardening wax, 0.3-0.5 part of defoaming agent, 30-37 parts of filler and 1.4-1.6 parts of pigment. For example: 36 parts of hydroxyl polyester resin, 20 parts of isocyanate curing agent, 1 part of leveling agent, 0.3 part of benzoin, 0.3 part of hardening wax, 0.3 part of defoaming agent, 30 parts of filler and 1.4 parts of pigment; for another example: 50 parts of hydroxyl polyester resin, 30 parts of isocyanate curing agent, 1.2 parts of leveling agent, 0.5 part of benzoin, 0.5 part of hardening wax, 0.5 part of defoaming agent, 37 parts of filler and 1.6 parts of pigment; for another example: 36 parts of hydroxyl polyester resin, 30 parts of isocyanate curing agent, 1 part of leveling agent, 0.5 part of benzoin, 0.3 part of hardening wax, 0.5 part of defoaming agent, 30 parts of filler and 1.6 parts of pigment; for another example: 50 parts of hydroxyl polyester resin, 20 parts of isocyanate curing agent, 1.2 parts of leveling agent, 0.3 part of benzoin, 0.5 part of hardening wax, 0.3 part of defoaming agent, 37 parts of filler and 1.4 parts of pigment; for another example: 36 parts of hydroxyl polyester resin, 20 parts of isocyanate curing agent, 1.2 parts of leveling agent, 0.5 part of benzoin, 0.3 part of hardening wax, 0.3 part of defoaming agent, 37 parts of filler and 1.6 parts of pigment; for another example: 50 parts of hydroxyl polyester resin, 30 parts of isocyanate curing agent, 1 part of leveling agent, 0.3 part of benzoin, 0.5 part of hardening wax, 0.5 part of defoaming agent, 30 parts of filler and 1.4 parts of pigment; for another example: 50 parts of hydroxyl polyester resin, 30 parts of isocyanate curing agent, 1.2 parts of leveling agent, 0.3 part of benzoin, 0.3 part of hardening wax, 0.3 part of defoaming agent, 30 parts of filler and 1.6 parts of pigment; for another example: 36 parts of hydroxyl polyester resin, 20 parts of isocyanate curing agent, 1 part of leveling agent, 0.3 part of benzoin, 0.5 part of hardening wax, 0.5 part of defoaming agent, 37 parts of filler and 1.6 parts of pigment; for another example: 36.9 parts of hydroxyl polyester resin, 23 parts of isocyanate curing agent, 1.2 parts of leveling agent, 0.4 part of benzoin, 0.3 part of hardening wax, 0.3 part of defoaming agent, 36.4 parts of filler, 1.5 parts of pigment and the like.
In certain embodiments, the hydroxyl polyester resin is formed by mixing a high hydroxyl polyester resin and a low hydroxyl polyester resin in a mass ratio of 27-35:9-15, for example: 3:1, 9:5, 27.8:9.1, 28:9, 28:9.5, 28:10, 28:11, 28:12.1, 28:13, 28:14, 28:15, 29:11, 29:13, 29:15, 30:9.1, 30:11, 30:12, 30:13, 2:1, 33:10, 33:13, 33:15, 35:9.7, 35:11, 35:12, 35:12.5, 35:13, 35:13.7, 35:14.3, 35:14.8, 7:3, etc.
In certain embodiments, the Gao Qiangji polyester resin has a hydroxyl number of from 280 to 320mgKOH/g, for example: 280mgKOH/g, 290mgKOH/g, 300mgKOH/g, 310mgKOH/g, 320mgKOH/g, etc., and the hydroxyl value of the low-hydroxyl polyester resin is 35 to 45mgKOH/g, for example: 35mgKOH/g, 36mgKOH/g, 37mgKOH/g, 38mgKOH/g, 39mgKOH/g, 40mgKOH/g, 41mgKOH/g, 42mgKOH/g, 43mgKOH/g, 44mgKOH/g, 45mgKOH/g, etc.
In certain embodiments, the Gao Qiangji polyester resin has a glass transition temperature of 60 ℃ or greater and a softening point of 100 to 120 ℃, for example: 100 ℃, 110 ℃, 120 ℃, etc., and a viscosity of 320-500pa·s at a temperature of 165 ℃, for example: 320 Pa.s, 380 Pa.s, 410 Pa.s, 440 Pa.s, 470 Pa.s, 500 Pa.s, etc.; and/or the low hydroxyl polyester resin has a glass transition temperature of at least 64 ℃ and a softening point of 115 to 125 ℃, for example: 115 ℃, 120 ℃, 125 ℃, etc., and a viscosity of 280-480pa·s at 165 ℃, for example: 280 Pa.s, 300 Pa.s, 340 Pa.s, 370 Pa.s, 400 Pa.s, 430 Pa.s, 450 Pa.s, 480 Pa.s, etc.
In certain embodiments, the isocyanate curing agent has an-NCO equivalent weight of 275 to 285g/mol, for example: 275g/mol, 280g/mol, 285g/mol, etc.
In certain embodiments, the leveling agent is an acrylic leveling agent and/or a polyether leveling agent; and/or the defoaming agent is an amide defoaming agent; and/or the filler is nepheline with a median particle size of 4-6 μm.
In order to better verify the technical effects that the present invention has been created to bring, the present researchers have conducted the following experimental study.
Example 1
The raw materials comprise 50.5kg of phenolic epoxy resin, 14.5kg of phenolic curing agent, 1.2kg of polyether leveling agent (TF-620), 0.3kg of benzoin, 0.3kg of amide defoamer (TP-39), 0.3kg of hardening wax (HD-520), 5kg of flatting agent (XG 603-1A), 26.4kg of nepheline particles with the medium particle diameter of 4-6 mu m as filler and 1.5kg of pigment. The glass transition temperature of the phenolic epoxy resin is more than or equal to 55 ℃, the softening point is 110 ℃, the epoxy equivalent is 800g/mol, and the viscosity is 200 Pa.s at 165 ℃; the phenolic curing agent is linear bisphenol A phenolic resin, and the hydroxyl equivalent is 245g/mol.
The preparation method comprises stirring the raw materials in a stirrer at 1200r/min for 180s, extruding at 90-100deg.C, cooling, pulverizing, grinding in a vertical mill, and sieving with 180 mesh sieve.
Example 2
The raw material components comprise 48.6kg of carboxyl polyester resin, 19kg of acrylic extinction resin, 1kg of flatting agent, 0.3kg of benzoin, 0.3kg of hardening wax, 0.3kg of defoamer, 29kg of filler and 1.5kg of pigment; the adopted carboxyl polyester resin has a glass transition temperature of 65 ℃, a softening point of 110 ℃, an acid value of 34mg KOH/g and a viscosity of 342 Pa.s at a temperature of 165 ℃; the acrylic matting resin had an epoxy equivalent of 700g/mol, otherwise identical to that of example 1.
Example 3
The raw material components comprise 27.8kg of high hydroxyl polyester resin, 9.1kg of low hydroxyl polyester resin, 23kg of isocyanate curing agent, 1.2kg of leveling agent, 0.4kg of benzoin, 0.3kg of hardening wax, 0.3kg of defoaming agent, 36.4kg of filler and 1.5kg of pigment; the glass transition temperature of the adopted high-hydroxyl polyester resin is more than or equal to 60 ℃, the softening point is 110 ℃, the hydroxyl value is 320mg/KOH/g, and the viscosity is 320 Pa.s at 165 ℃; the glass transition temperature of the low-hydroxyl polyester resin is more than or equal to 64 ℃, the softening point is 115 ℃, the hydroxyl value is 35mg/KOH/g, and the viscosity is 400 Pa.s at 165 ℃; the isocyanate curing agent was a blocked isocyanate curing agent, the NCO equivalent was 275g/mol, and the same procedure was followed as in example 1.
Example 4
The raw material components comprise 27kg of high hydroxyl polyester resin, 15kg of low hydroxyl polyester resin, 20kg of isocyanate curing agent, 1kg of leveling agent, 0.3kg of benzoin, 0.5kg of hardening wax, 0.3kg of defoaming agent, 30kg of filler and 1.4kg of pigment; the glass transition temperature of the adopted high-hydroxyl polyester resin is more than or equal to 60 ℃, the softening point is 120 ℃, the hydroxyl value is 280mg/KOH/g, and the viscosity is 500 Pa.s at 165 ℃; the glass transition temperature of the low-hydroxyl polyester resin is more than or equal to 64 ℃, the softening point is 125 ℃, the hydroxyl value is 45mg/KOH/g, and the viscosity is 480 Pa.s at 165 ℃; the isocyanate curing agent was a blocked isocyanate curing agent, -NCO equivalent was 285g/mol, and the same procedure as in example 1 was followed.
Example 5
The raw material components comprise 35kg of high hydroxyl polyester resin, 9kg of low hydroxyl polyester resin, 30kg of isocyanate curing agent, 1.1kg of leveling agent, 0.4kg of benzoin, 0.4kg of hardening wax, 0.4kg of defoaming agent, 35kg of filler and 1.6kg of pigment; the glass transition temperature of the adopted high-hydroxyl polyester resin is more than or equal to 60 ℃, the softening point is 120 ℃, the hydroxyl value is 280mg/KOH/g, and the viscosity is 500 Pa.s at 165 ℃; the glass transition temperature of the low-hydroxyl polyester resin is more than or equal to 64 ℃, the softening point is 125 ℃, the hydroxyl value is 45mg/KOH/g, and the viscosity is 480 Pa.s at 165 ℃; the isocyanate curing agent is a blocked isocyanate curing agent, and the NCO equivalent is 285g/mol; the leveling agent was acrylic resin, and the other materials were the same as in example 1.
The powder coatings for perfume display frames prepared in examples 1 to 5 were cured at 200℃for 10 minutes after being sprayed with an electrostatic gun, and the sprayed film thickness was 60 to 80. Mu.m, and the performance of the sprayed film was tested, the results of which are shown in Table 1 below.
TABLE 1 film Performance test
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Gloss (60 °) is between/% | 6.0±1 | 6.0±1 | 6.0±1 | 6.0±1 | 6.0±1 |
| Adhesion (hundred lattice method)/grade | 0 | 0 | 0 | 0 | 0 |
| Impact resistance test (QCJ impact instrument)/kg cm | 50 | 20 | 50 | 50 | 50 |
After the powder coatings prepared in examples 1 to 3 were applied to form coating films, the coating film layers were observed to change by treatment with a lanuginose water for 240 hours, and the results are shown in Table 2 and FIGS. 1, 2 and 3.
Table 2 lankoog resistant perfume 240h test
| 240h test condition of lankoog resistant perfume | |
| Example 1 | The perfume is absorbed by the coating film, the coating layer becomes soft, the adhesive force is poor, and the color is slightly changed |
| Example 2 | The perfume is absorbed by the coating film, the coating layer becomes soft, the adhesive force is poor, and the color is seriously changed |
| Example 3 | The perfume is not absorbed by the coating film, the coating film has no corrosion, no softening, no color change and good adhesive force |
As is clear from tables 1 and 2, the gloss (60 ℃) was 5 to 7%, and the impact resistance was 50kg cm by the QCJ impact machine forward impact test; after 240h of perfume resistance test, the conditions of color change, light loss, film softening, low hardness and reduced adhesive force are not found, the perfume has excellent perfume resistance, is suitable for being applied to the application of perfume showing frames, and can still keep better mechanical property and scratch resistance under lower gloss.
In addition, the present inventors examined the powder coating obtained in example 3 by electrostatic spraying on an aluminum veneer having a thickness of 0.5mm for color, gloss, thickness, impact strength, pencil hardness, adhesion (dicing method), bending test, and the like, and the results are shown in fig. 4.
The invention is realized by conventional technical means with reference to the prior art or common general knowledge known to a person skilled in the art.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The matte powder coating for the perfume display rack is characterized by comprising, by weight, 36-50 parts of hydroxyl polyester resin, 20-30 parts of isocyanate curing agent, 1-1.2 parts of leveling agent, 0.3-0.5 part of benzoin, 0.3-0.5 part of hardening wax, 0.3-0.5 part of defoaming agent, 30-37 parts of filler and 1.4-1.6 parts of pigment.
2. The matte powder coating for perfume display frames according to claim 1, wherein the raw material components comprise, by weight, 36.9 parts of hydroxyl polyester resin, 23 parts of isocyanate curing agent, 1.2 parts of leveling agent, 0.4 part of benzoin, 0.3 part of hardening wax, 0.3 part of defoaming agent, 36.4 parts of filler and 1.5 parts of pigment.
3. The matte powder coating for perfume display frames according to claim 1 or 2, wherein the hydroxyl polyester resin is formed by mixing high hydroxyl polyester resin and low hydroxyl polyester resin according to a mass ratio of 27-35:9-15.
4. A matte powder paint for a perfume display stand according to claim 3, wherein the hydroxyl polyester resin is formed by mixing a high hydroxyl polyester resin and a low hydroxyl polyester resin according to a mass ratio of 27.8:9.1.
5. A matte powder paint for a perfume display stand according to claim 3, wherein said Gao Qiangji polyester resin has a hydroxyl value of 280 to 320mgKOH/g and said low hydroxyl polyester resin has a hydroxyl value of 35 to 45mgKOH/g.
6. A matte powder paint for a perfume display stand according to claim 3, wherein said Gao Qiangji polyester resin has a glass transition temperature of at least 60 ℃, a softening point of 100-120 ℃ and a viscosity of 320-500 Pa-s at 165 ℃; and/or the glass transition temperature of the low hydroxyl polyester resin is more than or equal to 64 ℃, the softening point is 115-125 ℃, and the viscosity is 280-480 Pa.s at 165 ℃.
7. A matte powder coating for a perfume display stand according to claim 1 or 2, characterized in that the isocyanate curing agent has an NCO equivalent weight of 275-285g/mol.
8. A matte powder coating for a perfume display stand according to claim 1 or 2, characterized in that the leveling agent is an acrylic leveling agent and/or a polyether leveling agent; and/or the defoaming agent is an amide defoaming agent; and/or the filler is nepheline with a median particle size of 4-6 μm.
9. A method for preparing a matte powder paint for a perfume display stand according to any of claims 1-8, comprising the steps of:
(1) Sequentially adding hydroxyl polyester resin, isocyanate curing agent, leveling agent, benzoin, hardening wax, defoaming agent, filler and pigment into a stirrer for stirring and premixing to obtain premix;
(2) Melting and extruding the premix, and cooling and crushing to obtain a sheet material;
(3) Grinding the sheet material by a vertical mill, and sieving with a 180-mesh sieve to obtain the product.
10. Use of a matt powder coating for perfume display frames according to any of claims 1-8 or prepared by a process according to claim 9 in the coating of perfume display frames.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310849579.8A CN116694218A (en) | 2023-07-12 | 2023-07-12 | Matte powder coating for perfume display rack and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310849579.8A CN116694218A (en) | 2023-07-12 | 2023-07-12 | Matte powder coating for perfume display rack and preparation method and application thereof |
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| CN116694218A true CN116694218A (en) | 2023-09-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004018547A (en) * | 2002-06-12 | 2004-01-22 | Japan U-Pica Co Ltd | Powder coating resin composition |
| CN103409044A (en) * | 2013-07-08 | 2013-11-27 | 中国科学院宁波材料技术与工程研究所 | Powder coating with high pencil hardness |
| CN104356371A (en) * | 2014-11-25 | 2015-02-18 | 安徽神剑新材料股份有限公司 | Preparation method of hydroxyl-terminated polyester resin for co-extruding extinction powder coating |
| CN115678405A (en) * | 2022-11-11 | 2023-02-03 | 擎天材料科技有限公司 | Matte and transparent powder coating for skin, and preparation method and application thereof |
| CN116285636A (en) * | 2023-03-28 | 2023-06-23 | 安徽神剑新材料股份有限公司 | Low-gloss polyurethane powder coating and preparation method thereof |
-
2023
- 2023-07-12 CN CN202310849579.8A patent/CN116694218A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004018547A (en) * | 2002-06-12 | 2004-01-22 | Japan U-Pica Co Ltd | Powder coating resin composition |
| CN103409044A (en) * | 2013-07-08 | 2013-11-27 | 中国科学院宁波材料技术与工程研究所 | Powder coating with high pencil hardness |
| CN104356371A (en) * | 2014-11-25 | 2015-02-18 | 安徽神剑新材料股份有限公司 | Preparation method of hydroxyl-terminated polyester resin for co-extruding extinction powder coating |
| CN115678405A (en) * | 2022-11-11 | 2023-02-03 | 擎天材料科技有限公司 | Matte and transparent powder coating for skin, and preparation method and application thereof |
| CN116285636A (en) * | 2023-03-28 | 2023-06-23 | 安徽神剑新材料股份有限公司 | Low-gloss polyurethane powder coating and preparation method thereof |
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