CN112322188A - Environment-friendly aging-resistant electrostatic plastic powder coating and preparation and spraying process thereof - Google Patents
Environment-friendly aging-resistant electrostatic plastic powder coating and preparation and spraying process thereof Download PDFInfo
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- CN112322188A CN112322188A CN202011206957.3A CN202011206957A CN112322188A CN 112322188 A CN112322188 A CN 112322188A CN 202011206957 A CN202011206957 A CN 202011206957A CN 112322188 A CN112322188 A CN 112322188A
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- 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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
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- 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
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- 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
- C09D5/24—Electrically-conducting paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention provides an environment-friendly aging-resistant electrostatic plastic powder coating, and a preparation and spraying process thereof, wherein the plastic powder coating comprises the following components in percentage by weight: 53-57% of hydroxyl resin, 16-22% of nano precipitated barium sulfate, 16-20% of nano silicon dioxide micropowder, 0.5-0.8% of TGIC, 0.6-0.9% of brightener, 0.001-0.003% of nano graphene, 0.4-0.6% of nano polytetrafluoroethylene and 0.4-0.6% of degasifier. The nano-grade material is applied to the electrostatic plastic powder, the oxidation process of the coating, the metal component and the outside is isolated by utilizing the compactness of the nano-grade material, the service life of the metal component is prolonged, and in addition, the wear resistance of the coating can be enhanced only by adding 0.001-0.003% of nano-graphene. The prepared molding powder coating is wear-resistant and superhard, has good stability, is easy to operate, reduces energy consumption and saves cost.
Description
Technical Field
The invention belongs to the field of surface treatment protection of metal members, and particularly relates to an environment-friendly aging-resistant electrostatic plastic powder coating, and preparation and spraying processes thereof.
Background
The metal component is one of the most widely applied metal materials at present, and is widely applied to the fields of automobile manufacturing, three-dimensional storage, three-dimensional garage and the like. Common metals generally have relatively active chemical properties, so most of the metals are easy to corrode and cause great loss to human beings, and therefore, the surfaces of the metals need to be subjected to anticorrosion treatment.
The corrosion of metals is different in form and method of corrosion prevention due to different use environments and corrosion mechanisms. Wherein the surface coating corrosion prevention is an economical and practical corrosion prevention measure with simple and convenient operation. The powder coating is a novel solvent-free 100% solid powder environment-friendly coating, has the advantages of high coating efficiency, good protective property and decorative property and the like, receives wide attention all over the world, and thus is continuously and rapidly developed.
However, due to the double reasons of large external temperature and alkalinity and the corrosion of the metal member from inside to outside, the surface coating of the metal member has poor aging resistance and does not take more than several years.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides an environment-friendly aging-resistant electrostatic plastic powder coating and preparation and spraying processes thereof. The service life of the electrostatic plastic powder coating prepared by the process can be prolonged for years, more energy consumption, manpower and material resources are saved for the society, and the purposes of environmental protection, consumption reduction and energy conservation are achieved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
1. the invention provides an environment-friendly aging-resistant electrostatic plastic powder coating which comprises the following components in percentage by weight:
53-57% of hydroxyl resin,
16 to 22 percent of nano precipitated barium sulfate,
16 to 20 percent of nano silicon dioxide micro powder,
TGIC 0.5-0.8%，
0.6 to 0.9 percent of brightener,
0.001-0.003% of nano graphene,
0.4 to 0.6 percent of nano polytetrafluoroethylene,
0.4 to 0.6 percent of degasifier.
Optionally, the nanoscale material comprises nano precipitated barium sulfate, nano silica micropowder, nano graphene and nano polytetrafluoroethylene, and the particle size is 0.1-0.5 μm.
Hydroxyl resin is matrix resin, TGIC is curing agent, brightener is methyl methacrylate, and degassing agent is polyamide wax.
2. The invention also provides a preparation process of the environment-friendly aging-resistant electrostatic plastic powder coating, which comprises the following steps:
s1, weighing the following raw materials in parts by weight:
55-57% of hydroxyl resin,
20 to 22 percent of nano precipitated barium sulfate,
19 to 20 percent of nano silicon dioxide micro powder,
TGIC 0.5-0.8%，
0.6 to 0.9 percent of brightener,
0.001-0.003% of nano graphene,
0.4 to 0.6 percent of nano polytetrafluoroethylene,
0.4 to 0.6 percent of degasifier.
S2, mixing the raw material components weighed in the step S1 to obtain a mixture, melting and mixing the mixture at a high speed to obtain a fluid, cooling, tabletting and crushing to obtain a sheet material;
s3, grinding and sieving the flakes obtained in the step S2 to obtain the electrostatic molding powder coating.
3. The invention also provides a spraying process of the environment-friendly aging-resistant electrostatic plastic powder coating, which comprises the steps of spraying the electrostatic plastic powder coating by an automatic spray gun, enabling powder particles to generate charged load by an electrostatic generator, forming magnetic field charged particles between an electrode and a sprayed metal component, uniformly adsorbing the magnetic field charged particles to the surface of the component to be sprayed under the action of electrostatic attraction, and heating, melting and solidifying the component by a closed heating furnace to form a protective coating. The prepared electrostatic molding powder coating has the advantages of no solvent, no VOC (volatile organic compounds) emission, no water pollution, high repeated utilization rate (more than 98 percent) and the like, and is one of the most energy-saving, environment-friendly and most popular coatings for the current social development.
Optionally, the method comprises the following steps:
s1, pretreating the surface of the metal component;
s2, electrostatic plastic powder spraying
Moving the metal component to a dust-free spraying room through an automatic chain, and spraying electrostatic plastic powder on the surface of the metal component pretreated in the step S1 by using an automatic spray gun in a closed environment;
s3, curing and naturally cooling the sprayed coating
And (4) transferring the metal component sprayed in the step (S2) into a high-temperature furnace through a transmission chain, melting, self-leveling and solidifying the electrostatic plastic powder on the surface of the metal component to the surface of the metal component, then moving out of the high-temperature furnace, placing the metal component into a closed chamber, and cooling to the natural normal temperature.
Optionally, in step S1, the metal member surface pretreatment is performed by a physical method, which specifically includes:
s1.1, placing the metal component into polishing equipment for derusting and descaling;
s1.2, removing surface dirt impurities of the metal component treated in the step S1.1 by adopting a cloth bag type decontamination method, so that the metal component and the coating have better bonding strength.
Optionally, the distance between the automatic spray gun and the sprayed metal component is controlled to be 10-15cm, the temperature of the high-temperature furnace is controlled to be 160-220 ℃, and the heat preservation time is controlled to be 20-40 minutes.
Compared with the prior art, the environment-friendly aging-resistant electrostatic plastic powder coating, and the preparation and spraying processes thereof have the following beneficial effects:
according to the invention, the nano-grade material is applied to the electrostatic plastic powder, the super-strong compactness of the nano-grade material is utilized, the oxidation process of the partition between the coating and the metal component and the outside can be achieved, the effect of prolonging the service life of the metal component is achieved, and in addition, the wear resistance of the coating can be enhanced only by adding 0.001-0.003% of nano-graphene. The prepared molding powder coating is wear-resistant and super-hard, has good stability, is easy to operate, reduces energy consumption, saves cost, is suitable for automobile parts, building equipment, energy equipment, storage logistics and the like, and is super-strong and durable.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides an environment-friendly aging-resistant electrostatic plastic powder coating which comprises the following components in percentage by weight:
57 percent of hydroxyl resin,
21 percent of nano precipitated barium sulfate,
20 percent of nano silicon dioxide micro powder,
TGIC 0.5%，
0.6 percent of brightening agent,
0.003 percent of nano graphene,
0.4 percent of nano polytetrafluoroethylene,
0.5 percent of degasifier.
Wherein the nano-scale material comprises nano precipitated barium sulfate, nano silicon dioxide micropowder, nano graphene and nano polytetrafluoroethylene, and the particle size is 0.1-0.5 mu m.
The preparation process of the environment-friendly aging-resistant electrostatic plastic powder coating provided by the embodiment comprises the following steps:
s1, weighing the following raw materials in parts by weight:
s2, mixing the raw material components weighed in the step S1 to obtain a mixture, melting and mixing the mixture at a high speed to obtain a fluid, cooling, tabletting and crushing to obtain a sheet material;
s3, grinding and sieving the flakes obtained in the step S2 to obtain the electrostatic molding powder coating.
The spraying process of the environment protecting aging resistant electrostatic plastic powder paint includes spraying electrostatic plastic powder paint with automatic spray gun, electrostatic generator to make the powder particle produce charged load, forming magnetic field charged particle between the electrode and the sprayed metal member, electrostatic attraction to adsorb the charged particle onto the surface of the member, and heating in sealed heating furnace to melt and solidify to form the protecting coating. The method specifically comprises the following steps:
s1 surface pretreatment of metal member
The method for pretreating the surface of the metal component by using a physical method comprises the following steps:
s1.1, placing the metal component into polishing equipment for derusting and descaling;
s1.2, removing surface dirt impurities of the metal component treated in the step S1.1 by adopting a cloth bag type decontamination method, so that the metal component and the coating have better bonding strength;
s2, electrostatic plastic powder spraying
Moving the metal component to a dust-free spraying room through an automatic chain, and spraying electrostatic plastic powder on the surface of the metal component pretreated in the step S1 by using an automatic spray gun in a closed environment;
s3, curing and naturally cooling the sprayed coating
And (4) transferring the metal component sprayed in the step (S2) into a high-temperature furnace through a transmission chain, melting, self-leveling and solidifying the electrostatic plastic powder on the surface of the metal component to the surface of the metal component, then moving out of the high-temperature furnace, placing the metal component into a closed chamber, and cooling to the natural normal temperature.
In step S2, the distance between the automatic spray gun and the sprayed metal component is controlled at 10cm, the temperature of the high-temperature furnace is controlled at 160 ℃, and the heat preservation time is controlled at 20 minutes.
Example two
The invention provides an environment-friendly aging-resistant electrostatic plastic powder coating which comprises the following components in percentage by weight:
57 percent of hydroxyl resin,
21 percent of nano precipitated barium sulfate,
19.1 percent of nano silicon dioxide micro powder,
TGIC 0.8%，
0.9 percent of brightening agent,
0.001 percent of nano graphene,
0.6 percent of nano poly tetrafluoro,
0.6 percent of degasifier.
Wherein the nano-scale material comprises nano precipitated barium sulfate, nano silicon dioxide micropowder, nano graphene and nano polytetrafluoroethylene, and the particle size is 0.1-0.5 mu m.
The preparation process of the environment-friendly aging-resistant electrostatic plastic powder coating provided by the embodiment comprises the following steps:
s1, weighing the following raw materials in parts by weight:
the method for pretreating the surface of the metal component by using a physical method comprises the following steps:
s1.1, placing the metal component into polishing equipment for derusting and descaling;
s1.2, removing surface dirt impurities of the metal component treated in the step S1.1 by adopting a cloth bag type decontamination method, so that the metal component and the coating have better bonding strength;
s2, mixing the raw material components weighed in the step S1 to obtain a mixture, melting and mixing the mixture at a high speed to obtain a fluid, cooling, tabletting and crushing to obtain a sheet material;
s3, grinding and sieving the flakes obtained in the step S2 to obtain the electrostatic molding powder coating.
The spraying process of the environment protecting aging resistant electrostatic plastic powder paint includes spraying electrostatic plastic powder paint with automatic spray gun, electrostatic generator to make the powder particle produce charged load, forming magnetic field charged particle between the electrode and the sprayed metal member, electrostatic attraction to adsorb the charged particle onto the surface of the member, and heating in sealed heating furnace to melt and solidify to form the protecting coating. The method specifically comprises the following steps:
s1, pretreating the surface of the metal component;
s2, electrostatic plastic powder spraying
Moving the metal component to a dust-free spraying room through an automatic chain, and spraying electrostatic plastic powder on the surface of the metal component pretreated in the step S1 by using an automatic spray gun in a closed environment;
s3, curing and naturally cooling the sprayed coating
And (4) transferring the metal component sprayed in the step (S2) into a high-temperature furnace through a transmission chain, melting, self-leveling and solidifying the electrostatic plastic powder on the surface of the metal component to the surface of the metal component, then moving out of the high-temperature furnace, placing the metal component into a closed chamber, and cooling to the natural normal temperature.
In step S2, the distance between the automatic spray gun and the sprayed metal component is controlled at 12cm, the temperature of the high-temperature furnace is controlled at 200 ℃, and the holding time is controlled at 30 minutes.
EXAMPLE III
The invention provides an environment-friendly aging-resistant electrostatic plastic powder coating which comprises the following components in percentage by weight:
55.5 percent of hydroxyl resin,
22 percent of nano precipitated barium sulfate,
20 percent of nano silicon dioxide micro powder,
TGIC 0.7%，
0.8 percent of brightening agent,
0.002 percent of nano graphene,
0.5 percent of nano polytetrafluoroethylene,
0.5 percent of degasifier.
Wherein the nano-scale material comprises nano precipitated barium sulfate, nano silicon dioxide micropowder, nano graphene and nano polytetrafluoroethylene, and the particle size is 0.1-0.5 mu m.
The preparation process of the environment-friendly aging-resistant electrostatic plastic powder coating provided by the embodiment comprises the following steps:
s1, weighing the following raw materials in parts by weight:
s2, mixing the raw material components weighed in the step S1 to obtain a mixture, melting and mixing the mixture at a high speed to obtain a fluid, cooling, tabletting and crushing to obtain a sheet material;
s3, grinding and sieving the flakes obtained in the step S2 to obtain the electrostatic molding powder coating.
The spraying process of the environment protecting aging resistant electrostatic plastic powder paint includes spraying electrostatic plastic powder paint with automatic spray gun, electrostatic generator to make the powder particle produce charged load, forming magnetic field charged particle between the electrode and the sprayed metal member, electrostatic attraction to adsorb the charged particle onto the surface of the member, and heating in sealed heating furnace to melt and solidify to form the protecting coating. The method specifically comprises the following steps:
s1, pretreating the surface of the metal component;
the method for pretreating the surface of the metal component by using a physical method comprises the following steps:
s1.1, placing the metal component into polishing equipment for derusting and descaling;
s1.2, removing surface dirt impurities of the metal component treated in the step S1.1 by adopting a cloth bag type decontamination method, so that the metal component and the coating have better bonding strength;
s2, electrostatic plastic powder spraying
Moving the metal component to a dust-free spraying room through an automatic chain, and spraying electrostatic plastic powder on the surface of the metal component pretreated in the step S1 by using an automatic spray gun in a closed environment;
s3, curing and naturally cooling the sprayed coating
And (4) transferring the metal component sprayed in the step (S2) into a high-temperature furnace through a transmission chain, melting, self-leveling and solidifying the electrostatic plastic powder on the surface of the metal component to the surface of the metal component, then moving out of the high-temperature furnace, placing the metal component into a closed chamber, and cooling to the natural normal temperature.
In step S2, the distance between the automatic spray gun and the sprayed metal component is controlled at 15cm, the temperature of the high-temperature furnace is controlled at 220 ℃, and the heat preservation time is controlled at 40 minutes.
Comparative example 1
And the powder coating without nano graphene and nano polytetrafluoroethylene is taken as a comparative example I.
The light-retaining rates of the first embodiment and the first comparative example are measured by a photometer, and the test result shows that the light-retaining rate of the first embodiment is 75-80% and the light-retaining rate of the first comparative example is 65-70%.
The hardness of the first and the first comparative examples was tested with a 2mm cutting knife, and the test results showed that the examples had no significant drop of < 2% and the first comparative example had a drop rate of greater than 7%.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The environment-friendly aging-resistant electrostatic plastic powder coating is characterized by comprising the following components in percentage by weight:
53-57% of hydroxyl resin,
16 to 22 percent of nano precipitated barium sulfate,
16 to 20 percent of nano silicon dioxide micro powder,
TGIC 0.5-0.8％，
0.6 to 0.9 percent of brightener,
0.001-0.003% of nano graphene,
0.4 to 0.6 percent of nano polytetrafluoroethylene,
0.4 to 0.6 percent of degasifier.
2. The environment-friendly aging-resistant electrostatic plastic powder coating as claimed in claim 1, wherein the nanoscale material comprises nano precipitated barium sulfate, nano silica micropowder, nano graphene and nano polytetrafluoroethylene, and the particle size is 0.1-0.5 μm.
3. A preparation process of an environment-friendly aging-resistant electrostatic plastic powder coating is characterized by comprising the following steps:
s1, weighing the following raw materials in parts by weight:
53-57% of hydroxyl resin,
16 to 22 percent of nano precipitated barium sulfate,
16 to 20 percent of nano silicon dioxide micro powder,
TGIC 0.5-0.8％，
0.6 to 0.9 percent of brightener,
0.001-0.003% of nano graphene,
0.4 to 0.6 percent of nano polytetrafluoroethylene,
0.4 to 0.6 percent of degassing agent;
s2, mixing the raw material components weighed in the step S1 to obtain a mixture, melting and mixing the mixture at a high speed to obtain a fluid, cooling, tabletting and crushing to obtain a sheet material;
s3, grinding and sieving the flakes obtained in the step S2 to obtain the electrostatic molding powder coating.
4. The spraying process of environment protecting aging resistant electrostatic plastic powder paint features that the electrostatic plastic powder paint is sprayed via automatic spray gun, and the electrostatic generator makes the powder particle produce charged load to form magnetic field charged particle between the electrode and the sprayed metal member, which is adsorbed to the surface of the member to be sprayed under the action of electrostatic attraction and heated in sealed heating furnace to form the protecting coating.
5. The spraying process of the environment-friendly aging-resistant electrostatic plastic powder coating as claimed in claim 4, wherein the spraying process comprises the following steps:
s1, pretreating the surface of the metal component;
s2, electrostatic plastic powder spraying
Spraying electrostatic molding powder on the surface of the metal component pretreated in the step S1 by using an automatic spray gun in a closed environment;
s3, curing and naturally cooling the sprayed coating
And (4) transferring the metal component sprayed in the step (S2) into a high-temperature furnace, melting, self-leveling and solidifying the electrostatic plastic powder on the surface of the metal component to the surface of the metal component, then moving out of the high-temperature furnace, placing the metal component into a closed chamber, and cooling to the natural normal temperature.
6. The spraying process of the environmental protection aging resistant type electrostatic plastic powder coating as claimed in claim 4, wherein in step S1, the surface pretreatment of the metal member is performed by a physical method, which specifically comprises:
s1.1, placing the metal component into polishing equipment for derusting and descaling;
s1.2, removing surface dirt impurities of the metal component treated in the step S1.1 by adopting a cloth bag type decontamination method, so that the metal component and the coating have better bonding strength.
7. The spraying process of the environmental-friendly aging-resistant electrostatic plastic powder coating as claimed in claim 4, wherein the distance between the automatic spray gun and the sprayed metal member is controlled to be 10-15cm, the temperature of the high temperature furnace is controlled to be 160-220 ℃, and the heat preservation time is controlled to be 20-40 minutes.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140275409A1 (en) * | 2013-03-15 | 2014-09-18 | Ppg Industries Ohio, Inc. | Hard coatings containing graphenic carbon particles |
| CN106118389A (en) * | 2016-06-27 | 2016-11-16 | 广西平果宝信涂料有限公司 | A kind of sand streak pure polyester-type weather-resistant powder paint and preparation method thereof |
| CN109082212A (en) * | 2018-08-15 | 2018-12-25 | 常州纳美生物科技有限公司 | Modified pure polyester powdery paints of a kind of graphene and preparation method thereof |
| CN110819215A (en) * | 2018-08-14 | 2020-02-21 | 福建宏宇石墨烯新材料有限公司 | Modified graphene antistatic powder coating |
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2020
- 2020-11-03 CN CN202011206957.3A patent/CN112322188A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140275409A1 (en) * | 2013-03-15 | 2014-09-18 | Ppg Industries Ohio, Inc. | Hard coatings containing graphenic carbon particles |
| CN106118389A (en) * | 2016-06-27 | 2016-11-16 | 广西平果宝信涂料有限公司 | A kind of sand streak pure polyester-type weather-resistant powder paint and preparation method thereof |
| CN110819215A (en) * | 2018-08-14 | 2020-02-21 | 福建宏宇石墨烯新材料有限公司 | Modified graphene antistatic powder coating |
| CN109082212A (en) * | 2018-08-15 | 2018-12-25 | 常州纳美生物科技有限公司 | Modified pure polyester powdery paints of a kind of graphene and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 仵海东主编: "《金属材料工程实验教程》", 31 July 2017, 冶金工业出版社 * |
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Application publication date: 20210205 |