CN113861810A - High-hardness wear-resistant scratch-resistant MDF powder coating and preparation method thereof - Google Patents
High-hardness wear-resistant scratch-resistant MDF powder coating and preparation method thereof Download PDFInfo
- Publication number
- CN113861810A CN113861810A CN202111215289.5A CN202111215289A CN113861810A CN 113861810 A CN113861810 A CN 113861810A CN 202111215289 A CN202111215289 A CN 202111215289A CN 113861810 A CN113861810 A CN 113861810A
- Authority
- CN
- China
- Prior art keywords
- resistant
- mdf
- scratch
- coating
- powder coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 112
- 238000000576 coating method Methods 0.000 title claims abstract description 103
- 239000011248 coating agent Substances 0.000 title claims abstract description 100
- 230000003678 scratch resistant effect Effects 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000003822 epoxy resin Substances 0.000 claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- 229920001225 polyester resin Polymers 0.000 claims abstract description 15
- 239000004645 polyester resin Substances 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 4
- 239000000945 filler Substances 0.000 claims abstract description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 16
- 150000003512 tertiary amines Chemical class 0.000 claims description 14
- 238000005299 abrasion Methods 0.000 claims description 11
- 238000007873 sieving Methods 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 16
- 239000000049 pigment Substances 0.000 abstract description 8
- 239000004408 titanium dioxide Substances 0.000 abstract description 8
- 238000004132 cross linking Methods 0.000 abstract description 5
- 238000001723 curing Methods 0.000 description 22
- 238000010438 heat treatment Methods 0.000 description 21
- 238000001816 cooling Methods 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000011094 fiberboard Substances 0.000 description 9
- 239000006229 carbon black Substances 0.000 description 7
- 238000000227 grinding Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 238000005498 polishing Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 238000005303 weighing Methods 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 5
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000013035 low temperature curing Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004383 yellowing 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/68—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used
- C08G59/686—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a high-hardness, wear-resistant and scratch-resistant MDF powder coating and a preparation method thereof, wherein the MDF powder coating comprises the following raw materials in parts by weight: 35-45 parts of polyester resin, 25-30 parts of epoxy resin, 0.2-0.4 part of curing accelerator, 0.4-1 part of degassed wax powder, 0.2-0.5 part of sand grain wax powder, 0.5-1.5 parts of hardening wax powder, 20-30 parts of filler, 1-25 parts of titanium dioxide and 0-5 parts of pigment, and the coating can be rapidly cured at a low temperature of 130 ℃, has high crosslinking density after curing, can reach 5H in hardness of the final coating, has excellent wear resistance, and effectively prevents the occurrence of scratch damage in the use process.
Description
Technical Field
The invention belongs to the technical field of solid powder, and particularly relates to a high-hardness wear-resistant scratch-resistant MDF powder coating and a preparation method thereof.
Background
Medium Density Fiberboard (MDF) powder coating is the mainstream of green home coating currently and in the future. Considering that furniture special use environment, such as office tables, desks, tea tables and the like are easily scratched by hard objects in daily use, the coating is damaged, and the appearance and the use are affected, so that the development of the MDF powder coating with high hardness, wear resistance and scratch resistance meets the market demand.
The hardness of a mainstream MDF powder coating in the current market is only 2-3H generally, and although the hardness meets the standard requirement, the scratch resistance is still not excellent enough. The medium-density fiberboard belongs to a heat-sensitive substrate and is easily damaged by high temperature, so a low-temperature curing technology is required when powder electrostatic coating is adopted, and powder coating is usually required to be rapidly melted, leveled and cured at 130-150 ℃. In the case of powder coating, the hardness of the coating film is often affected by insufficient curing crosslinking density during low-temperature curing, and the conventional hardening aid is difficult to migrate to the surface of the coating film under low-temperature conditions, so that the hardening effect is difficult to exert.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-hardness wear-resistant scratch-resistant MDF powder coating and a preparation method thereof. The coating can be quickly cured at a low temperature of 130 ℃, the crosslinking density of the cured coating is high, the hardness of the final coating can reach 5H, and the wear resistance is excellent.
The technical scheme adopted by the invention is as follows:
a high-hardness wear-resistant scratch-resistant MDF powder coating comprises the following raw materials in parts by weight:
the high-hardness, wear-resistant and scratch-resistant MDF powder coating preferably comprises the following raw materials in parts by weight:
the acid number of the polyester resin is 73-85mg KOH/g, and the polyester resin in the acid number range has higher reactivity under the powder coating system of the invention.
The epoxy equivalent of the epoxy resin is 700-750g/eq, and the reactivity of the epoxy resin under the powder coating system of the invention is higher in the equivalent range.
The curing accelerator is a long-chain tertiary amine accelerator, the accelerator has a low melting point, the reactivity of polyester resin and epoxy resin in the powder coating can be effectively improved under the low-temperature curing condition, and the curing temperature of the powder can be effectively reduced to 130 ℃.
The preparation method of the long-chain tertiary amine accelerator comprises the following steps: 4L of dodecanol and 500mg of catalyst Cu 60/8P were put into a reaction vessel. Introducing enough nitrogen into the reaction kettle to replace air in the reaction kettle, introducing hydrogen to replace the nitrogen after the air is completely replaced, heating the environment of the reaction kettle to 190 ℃ and preserving heat to activate the catalyst, introducing hydrogen again in the heating process to supplement the consumed hydrogen, starting to introduce dimethylamine gas after the catalyst is activated, and continuously introducing for 4 hours. After reacting for 4 hours, introducing enough nitrogen into the reaction kettle to remove residual gas in the reaction, stopping heating, cooling the temperature of the reaction kettle to room temperature, taking out liquid reaction products, and carrying out reduced pressure distillation to obtain the long-chain type tertiary amine accelerator with higher purity. The preparation method is simple to operate and is suitable for industrial production.
The degassed wax powder is perfluorinated wax powder, can effectively eliminate pinholes and resist yellowing, and is excellent in wear resistance; the sand grain wax powder is polytetrafluoroethylene wax powder, has uniform grains and excellent wear resistance; both of them provide the functions of degassing and texture, and also have the functions of hardening and wear resistance.
The type of the hardening wax powder is PEW-0602F, the hardening wax powder can not only obviously improve the hardness of a coating, but also improve the smoothness of the coating, and the powder is very easy to migrate to the surface of a coating film during melting and curing, so that the hardening wax powder is suitable for preparing a sand pattern formula.
The filler is at least one of barium sulfate, calcium carbonate and wollastonite.
The preparation method of the high-hardness, wear-resistant and scratch-resistant MDF powder coating comprises the following steps: the raw materials with the formula ratio are fully and uniformly mixed, melted and extruded by an extruder, and crushed and sieved by a mill.
The extrusion temperature of the extruder is 80 ℃, and the sieving is carried out by a 220-mesh sieve.
The invention also provides a high-hardness, wear-resistant and scratch-resistant MDF coating which is formed by spraying the high-hardness, wear-resistant and scratch-resistant MDF powder coating on the MDF and then curing the MDF powder coating.
The curing method comprises the following steps: curing by infrared heating at 130 deg.C for 3 min.
The MDF powder coating with high hardness, wear resistance and scratch resistance provided by the invention has the coating hardness of 5H, and can effectively avoid scratch damage in daily use. At the same time, the results of the abrasion resistance test carried out in accordance with standard Taber ASTM D4060/84, 750g load 1000 revolutions, show that the abrasion resistance of the coating is likewise excellent, and the result of the abrasion test is only 3 mg. The MDF powder provided by the invention has the other characteristics that the powder coating can realize low-temperature rapid curing at a temperature of 130 ℃/3min, the coating curing rate is high, and the improvement of hardness is facilitated.
The high-hardness wear-resistant scratch-resistant MDF powder coating provided by the invention has the advantages that the hardness of the coating can reach 5H, the wear-resistant scratch-resistant MDF powder coating has excellent wear-resistant scratch-resistant performance, and the main reasons are as follows:
firstly, a high-activity resin is adopted: the polyester resin adopted by the invention has an acid value of 73-85mgKOH/g and an epoxy resin equivalent of 700-750g/eq, and is characterized by high reaction activity and contribution to improving the crosslinking density.
Secondly, the long-chain tertiary amine accelerator is adopted, the melting point of the accelerator is low, and the accelerator is liquid at normal temperature, so that the accelerator can play a role in promoting under a low-temperature curing environment, and the crosslinking density of the coating is improved.
Thirdly, the hardening wax powder is adopted to improve the hardness of the coating, the content of effective substances reaches 15%, and the floating rate is high. And the degassed wax powder and the sand grain wax powder have the wear-resisting function.
Compared with the prior art, the invention has the following advantages:
the MDF powder coating provided by the invention can reach a coating hardness of 5H after being cured into a film, has excellent wear-resistant and scratch-resistant performances, and can effectively prevent the condition of scratch and damage in the using process. The MDF powder coating provided by the invention can realize low-temperature rapid curing at 130 ℃ for 3min, and has the same curing conditions as the MDF powder coating commonly used in the current market, so that a user can directly use the MDF powder coating without changing a coating process.
Detailed Description
The present invention will be described in detail with reference to examples.
The polyester resin used in each example has an acid value of 73-85mg KOH/g and a type of CryLCOAT1506-6, and is manufactured by Zhan Xin company;
the epoxy equivalent of the epoxy resin is 700-750g/eq, the model is HY 903L, and the manufacturer is a constant new material;
the preparation method of the long-chain tertiary amine accelerator comprises the following steps: 4L of dodecanol and 500mg of catalyst Cu 60/8P were put into a reaction vessel. Introducing enough nitrogen into the reaction kettle to replace air in the reaction kettle, introducing hydrogen to replace the nitrogen after the air is completely replaced, heating the environment of the reaction kettle to 190 ℃ and preserving heat to activate the catalyst, introducing hydrogen again in the heating process to supplement the consumed hydrogen, starting to introduce dimethylamine gas after the catalyst is activated, and continuously introducing for 4 hours. After reacting for 4 hours, introducing enough nitrogen into the reaction kettle to remove residual reaction gas, stopping heating, cooling the temperature of the reaction kettle to room temperature, taking out a liquid reaction product, and carrying out reduced pressure distillation to obtain the product; the manufacturer of the chemical agent Cu 60/8P is Solvay investment Co., Ltd;
the degassed wax powder is perfluorinated wax powder; the sand grain wax powder is polytetrafluoroethylene wax powder;
the type of the hardening wax powder is PEW-0602F, and the manufacturer is Nanjing Tianshi New Material science and technology company Limited;
in each example and comparative example, and each raw material is not specifically described, the same batch of the same type of raw material was used.
Example 1
The MDF powder coating with high hardness, wear resistance and scratch resistance comprises the following raw materials in parts by weight: 640 parts of polyester resin 1506-containing organic silicon-rubber, 28 parts of epoxy resin HY 903L, 0.2 part of long-chain tertiary amine accelerator, 0.5 part of degassed wax powder, 0.3 part of sand grain wax powder, 0.5 part of hardening wax powder, 28 parts of barium sulfate, 3 parts of titanium dioxide and 1 part of carbon black pigment.
The powder coating is prepared by accurately weighing and uniformly mixing the raw materials of the components, performing melt extrusion, tabletting and cooling by a double-screw extruder at the extrusion temperature of 80 ℃, crushing by a mill and sieving by a 220-mesh sieve. After edge sealing, polishing and grinding are carried out on a Medium Density Fiberboard (MDF), powder coating is sprayed on the surface of the MDF board by using an electrostatic spray gun, and the MDF board is placed in an infrared heating furnace for heating and curing after being sprayed, wherein the set temperature is 130 ℃ and the time is 3 min. And naturally cooling after the coating is solidified to obtain the coating.
Example 2
The MDF powder coating with high hardness, wear resistance and scratch resistance comprises the following raw materials in parts by weight: 640 parts of polyester resin CRYLCOAT 1506-one, 28 parts of epoxy resin HY 903L, 0.2 part of long-chain tertiary amine accelerator, 0.5 part of degassed wax powder, 0.3 part of sand grain wax powder, 1 part of hardening wax powder, 28 parts of barium sulfate, 3 parts of titanium dioxide and 1 part of carbon black pigment.
The powder coating is prepared by accurately weighing and uniformly mixing the raw materials of the components, performing melt extrusion, tabletting and cooling by a double-screw extruder at the extrusion temperature of 80 ℃, crushing by a mill and sieving by a 220-mesh sieve. After edge sealing, polishing and grinding are carried out on a Medium Density Fiberboard (MDF), powder coating is sprayed on the surface of the MDF board by using an electrostatic spray gun, and the MDF board is placed in an infrared heating furnace for heating and curing after being sprayed, wherein the set temperature is 130 ℃ and the time is 3 min. And naturally cooling after the coating is solidified to obtain the coating.
Example 3
The MDF powder coating with high hardness, wear resistance and scratch resistance comprises the following raw materials in parts by weight: 640 parts of polyester resin CRYLCOAT 1506-one, 28 parts of epoxy resin HY 903L, 0.2 part of long-chain tertiary amine accelerator, 0.5 part of degassed wax powder, 0.3 part of sand grain wax powder, 1.5 parts of hardening wax powder, 28 parts of barium sulfate, 3 parts of titanium dioxide and 1 part of carbon black pigment.
The powder coating is prepared by accurately weighing and uniformly mixing the raw materials of the components, performing melt extrusion, tabletting and cooling by a double-screw extruder at the extrusion temperature of 80 ℃, crushing by a mill and sieving by a 220-mesh sieve. After edge sealing, polishing and grinding are carried out on a Medium Density Fiberboard (MDF), powder coating is sprayed on the surface of the MDF board by using an electrostatic spray gun, and the MDF board is placed in an infrared heating furnace for heating and curing after being sprayed, wherein the set temperature is 130 ℃ and the time is 3 min. And naturally cooling after the coating is solidified to obtain the coating.
Example 4
The MDF powder coating with high hardness, wear resistance and scratch resistance comprises the following raw materials in parts by weight: 640 parts of polyester resin CRYLCOAT 1506-one, 28 parts of epoxy resin HY 903L, 0.3 part of long-chain tertiary amine accelerator, 0.5 part of degassed wax powder, 0.3 part of sand grain wax powder, 1.5 parts of hardening wax powder, 28 parts of barium sulfate, 3 parts of titanium dioxide and 1 part of carbon black pigment.
The powder coating is prepared by accurately weighing and uniformly mixing the raw materials of the components, performing melt extrusion, tabletting and cooling by a double-screw extruder at the extrusion temperature of 80 ℃, crushing by a mill and sieving by a 220-mesh sieve. After edge sealing, polishing and grinding are carried out on a Medium Density Fiberboard (MDF), powder coating is sprayed on the surface of the MDF board by using an electrostatic spray gun, and the MDF board is placed in an infrared heating furnace for heating and curing after being sprayed, wherein the set temperature is 130 ℃ and the time is 3 min. And naturally cooling after the coating is solidified to obtain the coating.
Example 5
The MDF powder coating with high hardness, wear resistance and scratch resistance comprises the following raw materials in parts by weight: 640 parts of polyester resin CRYLCOAT 1506-one, 28 parts of epoxy resin HY 903L, 0.4 part of long-chain tertiary amine accelerator, 0.5 part of degassed wax powder, 0.3 part of sand grain wax powder, 1.5 parts of hardening wax powder, 28 parts of barium sulfate, 3 parts of titanium dioxide and 1 part of carbon black pigment.
The powder coating is prepared by accurately weighing and uniformly mixing the raw materials of the components, performing melt extrusion, tabletting and cooling by a double-screw extruder at the extrusion temperature of 80 ℃, crushing by a mill and sieving by a 220-mesh sieve. After edge sealing, polishing and grinding are carried out on a Medium Density Fiberboard (MDF), powder coating is sprayed on the surface of the MDF board by using an electrostatic spray gun, and the MDF board is placed in an infrared heating furnace for heating and curing after being sprayed, wherein the set temperature is 130 ℃ and the time is 3 min. And naturally cooling after the coating is solidified to obtain the coating.
Comparative example 1
The MDF powder coating comprises the following raw materials in parts by weight: polyester resin CRYLCOAT 1506-640 parts, epoxy resin HY 903L 28 parts, commercially available accelerator imidazole 0.4 part, degassed wax powder 0.5 part, sand grain wax powder 0.3 part, hardening wax powder 1.5 parts, barium sulfate 28 parts, titanium dioxide 3 parts and carbon black pigment 1 part.
The powder coating is prepared by accurately weighing and uniformly mixing the raw materials of the components, performing melt extrusion, tabletting and cooling by a double-screw extruder at the extrusion temperature of 80 ℃, crushing by a mill and sieving by a 220-mesh sieve. After edge sealing, polishing and grinding are carried out on a Medium Density Fiberboard (MDF), powder coating is sprayed on the surface of the MDF board by using an electrostatic spray gun, and the MDF board is placed in an infrared heating furnace for heating and curing after being sprayed, wherein the set temperature is 130 ℃ and the time is 3 min. And naturally cooling after the coating is solidified to obtain the coating.
Comparative example 2
The MDF powder coating comprises the following raw materials in parts by weight: polyester resin CRYLCOAT 1620-040 parts with acid value of 48-55mg KOH/g, epoxy resin E1228 parts with epoxy equivalent of 800-850g/eq, tertiary amine accelerator 0.4 parts, degassed wax powder 0.5 parts, sand grain wax powder 0.3 parts, hardening wax powder 1.5 parts, barium sulfate 28 parts, titanium dioxide 3 parts and carbon black pigment 1 part.
The powder coating is prepared by accurately weighing and uniformly mixing the raw materials of the components, performing melt extrusion, tabletting and cooling by a double-screw extruder at the extrusion temperature of 80 ℃, crushing by a mill and sieving by a 220-mesh sieve. After edge sealing, polishing and grinding are carried out on a Medium Density Fiberboard (MDF), powder coating is sprayed on the surface of the MDF board by using an electrostatic spray gun, and the MDF board is placed in an infrared heating furnace for heating and curing after being sprayed, wherein the set temperature is 130 ℃ and the time is 3 min. And naturally cooling after the coating is solidified to obtain the coating.
The obtained coatings described in all the above embodiments were tested for their properties, and the results are shown in table 1:
TABLE 1
| Case(s) | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 |
| Hardness of pencil | 2H | 3H | 3H | 4H | 5H | 2H | 1H |
| Wear and tear | 8 mg | 8mg | 6mg | 5mg | 3mg | 20mg | 28mg |
Remarking: the abrasion test was carried out according to the standard Taber ASTM D4060/84, with a load of 750g and a 1000-turn test.
The high-hardness wear-resistant scratch-resistant MDF powder coating disclosed by the embodiment of the invention has excellent hardness and wear resistance after film forming. In the formula range of the invention, the hardness and the wear resistance of the coating can be improved along with the increase of the dosage of the hardening wax powder; the use amount of the tertiary amine accelerator is increased, so that the hardness and the wear resistance of the coating can be improved; the curing accelerating effect is deteriorated if the long-chain tertiary amine accelerator in the examples is replaced with imidazole; if the polyester resin and the epoxy resin in the examples are replaced with the low acid number polyester and the high equivalent weight epoxy resin in comparative example 2, the hardness and abrasion resistance of the coating layer are deteriorated.
The high-hardness wear-resistant scratch-resistant powder coating provided by the invention has high bonding force with a substrate, has excellent scratch-resistant performance, and effectively prevents the situation of scratch damage in the using process. Meanwhile, the powder coating can still realize rapid curing at 130 ℃ for 3min, and the curing conditions are consistent with the curing conditions of the MDF powder coating which is the mainstream in the market, so that a customer does not need to change the coating process.
The above detailed description of a high hardness, abrasion and scratch resistant MDF powder coating and its method of preparation with reference to the examples is illustrative and not restrictive, and several examples are listed within the limits, and therefore variations and modifications without departing from the general inventive concept are intended to be within the scope of the present invention.
Claims (10)
1. The high-hardness wear-resistant scratch-resistant MDF powder coating is characterized by comprising the following raw materials in parts by weight:
2. the high-hardness, wear-resistant and scratch-resistant MDF powder coating as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight:
3. the high hardness, abrasion resistant, scratch resistant MDF powder coating of claim 1, wherein said polyester resin has an acid number of 73-85mg KOH/g.
4. The high hardness, abrasion resistant, scratch resistant MDF powder coating of claim 1, wherein said epoxy resin has an epoxy equivalent weight of 700-750 g/eq.
5. The high hardness, abrasion and scratch resistant MDF powder coating of claim 1, wherein said cure accelerator is a long chain tertiary amine accelerator.
6. The high hardness, abrasion resistant, scratch resistant MDF powder coating of claim 1, wherein said degassed wax powder is a perfluorinated wax powder; the sand grain wax powder is polytetrafluoroethylene wax powder; the type of the hardening wax powder is PEW-0602F.
7. The high hardness, wear and scratch resistant MDF powder coating of claim 1, wherein said filler is one of barium sulfate, calcium carbonate, wollastonite.
8. The process for the preparation of the high hardness, abrasion and scratch resistant MDF powder coating according to any of claims 1 to 7, characterized in that it comprises the following steps: the raw materials with the formula ratio are fully and uniformly mixed, melted and extruded by an extruder, and crushed and sieved by a mill.
9. The method as claimed in claim 8, wherein the extruder has an extrusion temperature of 80 ℃ and the sieving is performed by a 220-mesh sieve.
10. A high-hardness, wear-resistant and scratch-resistant MDF coating, which is characterized in that the coating is formed by spraying the high-hardness, wear-resistant and scratch-resistant MDF powder coating as claimed in any one of claims 1 to 7 on MDF and then curing the MDF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215289.5A CN113861810A (en) | 2021-10-19 | 2021-10-19 | High-hardness wear-resistant scratch-resistant MDF powder coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215289.5A CN113861810A (en) | 2021-10-19 | 2021-10-19 | High-hardness wear-resistant scratch-resistant MDF powder coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113861810A true CN113861810A (en) | 2021-12-31 |
Family
ID=79000230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111215289.5A Pending CN113861810A (en) | 2021-10-19 | 2021-10-19 | High-hardness wear-resistant scratch-resistant MDF powder coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113861810A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093776A (en) * | 2022-07-08 | 2022-09-23 | 广东睿智环保科技有限责任公司 | Antibacterial powder coating for MDF heat transfer printing and application method thereof |
| CN115286982A (en) * | 2022-09-05 | 2022-11-04 | 老虎涂料(江苏)有限公司 | MDF density board and wood board low-temperature powder coating composition and coating thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948409A (en) * | 2006-10-25 | 2007-04-18 | 广州电器科学研究院 | Low temperature solidified powder paint used for coating medium density fiber board and its production technology |
| CN107304326A (en) * | 2016-04-25 | 2017-10-31 | 江门市东健粉末涂装科技有限公司 | Powdery paints and preparation method thereof and the application in wood surface spraying |
| CN109517494A (en) * | 2017-09-17 | 2019-03-26 | 立邦涂料（天津）有限公司 | A kind of high rigidity epoxy-polyester type powder paint compositions, preparation method and applications |
| CN112831247A (en) * | 2021-01-07 | 2021-05-25 | 浙江中法新材料有限公司 | High-toughness low-temperature curing powder coating and preparation method and application thereof |
-
2021
- 2021-10-19 CN CN202111215289.5A patent/CN113861810A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948409A (en) * | 2006-10-25 | 2007-04-18 | 广州电器科学研究院 | Low temperature solidified powder paint used for coating medium density fiber board and its production technology |
| CN107304326A (en) * | 2016-04-25 | 2017-10-31 | 江门市东健粉末涂装科技有限公司 | Powdery paints and preparation method thereof and the application in wood surface spraying |
| CN109517494A (en) * | 2017-09-17 | 2019-03-26 | 立邦涂料（天津）有限公司 | A kind of high rigidity epoxy-polyester type powder paint compositions, preparation method and applications |
| CN112831247A (en) * | 2021-01-07 | 2021-05-25 | 浙江中法新材料有限公司 | High-toughness low-temperature curing powder coating and preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093776A (en) * | 2022-07-08 | 2022-09-23 | 广东睿智环保科技有限责任公司 | Antibacterial powder coating for MDF heat transfer printing and application method thereof |
| CN115286982A (en) * | 2022-09-05 | 2022-11-04 | 老虎涂料(江苏)有限公司 | MDF density board and wood board low-temperature powder coating composition and coating thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113861810A (en) | High-hardness wear-resistant scratch-resistant MDF powder coating and preparation method thereof | |
| EP2989140B1 (en) | Vinyl functionalized urethane resins for powder coating compositions | |
| CN112538293A (en) | Vibration wear-resistant coating and preparation method and spraying process thereof | |
| CN106398482B (en) | A kind of low-temperature setting mallear stria powdery paints and preparation method thereof | |
| CN104710593B (en) | A kind of construction technology of the preparation method of colorful polyurethane plastic and colorful polyurethane plastic runway | |
| CN111732711B (en) | Preparation method and application of bio-based modified polyurethane resin | |
| CN112646355A (en) | High-strength wear-resistant thermoplastic polyurethane elastomer and preparation method thereof | |
| CN106675257B (en) | Safe environment-friendly semi-matte varnish for automotive interior parts and preparation method thereof | |
| CN110028675B (en) | Modified epoxy ester resin, coating composition and preparation method | |
| WO2021088147A1 (en) | Preparation method for composite material containing ultra-wear-resistant and easy-to-clean pvc pre-coated film | |
| CN110256949B (en) | High-adhesion extinction powder coating and preparation method thereof | |
| CN111057466A (en) | High-temperature-resistant powder coating | |
| CN101497764B (en) | Formula and production process of polyethersulfone water soluble paint | |
| CN104788997B (en) | Modified oxide, powdery paints and its preparation method and application | |
| CN112724798B (en) | Powder coating with metal effect and preparation method thereof | |
| CN112457748B (en) | High-toughness low-temperature-resistant powder coating and preparation method thereof | |
| CN109503823B (en) | Low-temperature curing type polyester resin and preparation method and application thereof | |
| CN110183617B (en) | A transparent powder with excellent wear resistance is prepared from (A) 50: 50 polyester resin and preparation method and application thereof | |
| CN111205750A (en) | High-temperature-resistant powder coating and preparation method thereof | |
| CN109575259B (en) | Flame-retardant polyester resin for HAA system and preparation method and application thereof | |
| CN114015008A (en) | Polyurethane emulsion, preparation method thereof, printing coating and preparation method thereof | |
| CN112048055A (en) | Polyether ester type polyurethane coating material and controlled release fertilizer prepared from same | |
| CN112480794A (en) | Mixed extinction powder coating and preparation method thereof | |
| CN111186180A (en) | High-film-separation VCM color-coated sheet for furniture | |
| CN112322155B (en) | Polyester resin with low TGIC consumption and excellent low-temperature resistance for powder coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211231 |