CN112724726A - Powder coating composition with light energy storage effect, preparation method thereof and coating - Google Patents
Powder coating composition with light energy storage effect, preparation method thereof and coating Download PDFInfo
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- CN112724726A CN112724726A CN202011599597.8A CN202011599597A CN112724726A CN 112724726 A CN112724726 A CN 112724726A CN 202011599597 A CN202011599597 A CN 202011599597A CN 112724726 A CN112724726 A CN 112724726A
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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
- C09D5/032—Powdery paints characterised by a special effect of the produced film, e.g. wrinkle, pearlescence, matt finish
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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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- 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
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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
- C09D5/22—Luminous paints
-
- 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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Abstract
The invention discloses a powder coating composition with a light energy storage effect, which comprises a powder coating base powder composition and noctilucent powder, wherein the noctilucent powder is bonded and compounded on the particle surface of the powder coating base powder composition by a thermal bonding process; the invention also discloses a preparation method of the powder coating composition, in the heat bonding process, after the bonding machine reaches the bonding temperature, the rotating speed range of the bonding machine is set to 1500-3500 rpm, and the bonding time range is set to 1-5 minutes; the invention also discloses a coating with the light energy storage effect, which is formed by spraying the powder coating on a substrate and then curing; the cured coating prepared by the invention has concentrated spontaneous light intensity, high light intensity and long self-luminous time, and is very suitable for being applied to the coating application field with self-luminous requirements.
Description
Technical Field
The invention belongs to the field of powder coating, and particularly relates to a powder coating composition with a light energy storage effect, a preparation method of the powder coating composition and a coating with the light energy storage effect.
Background
The thermosetting powder coating has the advantages of environmental protection, low energy consumption, convenient construction, no VOC emission and the like, so the thermosetting powder coating is widely used for replacing paint and water-based paint to realize protection and decoration of products in various fields.
However, when applied to certain product fields with specific requirements, the conventional powder coating products cannot meet the requirements generally. In particular, due to specific requirements, products coated with the powder coating have a light energy storage effect (specifically, the products can self-emit light in a dark environment after being illuminated). There are some powder coating products with light energy storage effect (commonly called noctilucent effect) and some technical publications, for example, patent application with publication number CN104130680A discloses a noctilucent powder coating, whose principle includes: 700 parts by mass of alkyd resin 550-containing carboxyl, 35-50 parts by mass of triglycidyl isocyanurate, 10-20 parts by mass of light-induced energy storage luminous powder, 400 parts by mass of filler 210-containing carboxyl and 10 parts by mass of an auxiliary agent; and crushing and mixing the alkyd resin containing carboxyl, triglycidyl isocyanurate, the photoinduced energy storage luminous powder, the filler and the auxiliary agent, then performing melt extrusion, cooling, crushing and grading to obtain the luminous powder coating. The applicant finds through experiments that the light energy storage effect of the scheme is poor, and after the light is irradiated for a certain time, the light emitting time of the luminous powder coating under the dark environment is not more than 15 minutes, which is difficult to be accepted by users, so that the application of the luminous powder coating product is obviously limited.
Therefore, the applicant wishes to seek new technical solutions to solve the above technical problems.
Disclosure of Invention
In view of the above, the present invention provides a powder coating composition with a light energy storage effect, a preparation method thereof and a coating, wherein the prepared cured coating has concentrated spontaneous light intensity, high light intensity and long spontaneous light time, and is very suitable for application in the field of coating application with self-luminescence requirements.
The technical scheme adopted by the invention is as follows:
the powder coating composition with the light energy storage effect comprises a powder coating base powder composition and noctilucent powder, wherein the noctilucent powder is bonded and compounded on the surfaces of particles of the powder coating base powder composition through a thermal bonding process.
Preferably, the noctilucent powder accounts for not less than 5 wt% of the powder coating base powder composition.
Preferably, the noctilucent powder accounts for 10-25 wt% of the powder coating base powder composition.
Preferably, the average particle size of the noctilucent powder is 8-30 microns; the average particle size in the present application refers to the D50 particle size data obtained from a Malvern particle size Analyzer 2000.
Preferably, the powder coating primer composition comprises a thermosetting resin and a curing agent for cross-linking and curing the thermosetting resin.
Preferably, the thermosetting resin comprises an epoxy resin and/or a polyester resin and/or an acrylic resin and/or a fluorocarbon resin.
Preferably, in the preparation method of the powder coating composition, after the bonding machine reaches the bonding temperature in the thermal bonding process, the rotating speed range of the bonding machine is set to 1500-.
Preferably, the method for preparing the powder coating composition comprises the following steps:
s10), placing the powder coating base powder composition in a bonding machine;
s20), when the bonding machine reaches the bonding temperature, adding the noctilucent powder into the bonding machine to enable noctilucent powder particles to be bonded and compounded on the surfaces of the powder coating base powder composition particles;
s30), taking out the powder coating with the light energy storage effect from the bonding equipment.
Preferably, the bonding temperature is 5-20 ℃ higher than the glass transition temperature of the powder coating primer composition. The vitrification temperature can be obtained by detection through a METTLER thermal analyzer, a Differential Scanning Calorimetry (DSC) is adopted as a detection method, and the heating temperature-rise speed parameter is set at 20 ℃/min.
Preferably, the coating with the light energy storage effect is formed by spraying the powder coating on a substrate and then curing.
Because the existing noctilucent powder coating products realize the dispersion and mixing of noctilucent powder with a light energy storage effect in the powder coating through a melting co-extrusion process, the applicant surprisingly finds that the melting extrusion process can greatly cause the damage to the particle size and the structure of the noctilucent powder, and finally causes a great negative effect on the light energy storage effect of a cured coating of the noctilucent powder, the spontaneous light intensity is very weak, and the sustainable self-luminous time is very short; therefore, the applicant creatively proposes that a powder coating composition is prepared in advance to serve as base powder, and then noctilucent powder is bonded and compounded on the surfaces of particles of the powder coating base powder composition through a thermal bonding process, the bonding process cannot damage the structure of the noctilucent powder, the optical energy storage performance of the noctilucent powder is kept, and meanwhile, the noctilucent powder of the thermal bonding structure is intensively distributed on the surface of a cured coating of the noctilucent powder, so that the cured coating prepared by the invention is centralized in spontaneous light intensity, high in light intensity and long in spontaneous light emitting time, and is very suitable for being applied to the coating application field with the self-luminous requirement.
Detailed Description
The embodiment provides a powder coating composition with a light energy storage effect, which comprises a powder coating base powder composition and noctilucent powder, wherein the noctilucent powder is bonded and compounded on the particle surface of the powder coating base powder composition through a thermal bonding process; generally, the optical energy storage effect is enhanced along with the addition amount of the noctilucent powder, and the expected self-luminous effect cannot be realized by the noctilucent powder with low addition amount, but when the addition amount of the noctilucent powder reaches a certain proportion, the optical energy storage effect cannot be increased any more, and the basic performance of the cured coating film is affected by an excessively high proportion of the noctilucent powder, and the raw material cost is high, so that preferably, in the embodiment, the noctilucent powder accounts for not less than 5 wt%, preferably 10-25 wt%, and more preferably 15-25 wt% of the powder coating base powder composition; preferably, the average particle size of the luminescent powder is 8-30 microns, more preferably 10-20 microns, specifically, a long-acting luminescent material sold in the market can be adopted, specifically, the product types of the luminescent powder including HL-XP6, HL-XP11, HL-P3 series and YG-4126 series can be directly adopted, and other luminescent powder with similar light energy storage and self-luminous effects can also be adopted, which is not particularly limited in the application.
Preferably, the powder coating base powder composition comprises a thermosetting resin and a curing agent for crosslinking and curing the thermosetting resin; further preferably, the thermosetting resin comprises an epoxy resin and/or a polyester resin and/or an acrylic resin and/or a fluorocarbon resin; the resin curing system used in the powder coating base powder composition may specifically include a pure epoxy resin curing system, a polyester-epoxy curing system, a polyester-TGIC and/or HAA and/or isocyanate compound curing system, an acrylic resin curing system, a fluorocarbon resin curing system, and the like, and the present application is not particularly limited thereto. The skilled person can select the resin curing system and the resin itself according to the needs of the actual application field, which is not intended to be a specific limitation of the present application, and the replacement of the resin curing system does not affect the core technical effect to be achieved by the present application.
The embodiment also provides a preparation method of the above powder coating composition, and the specific adopted thermal bonding process can be directly referred to the thermal bonding process adopted by the conventional metal powder coating, preferably, in the thermal bonding process, after the bonding machine reaches the bonding temperature, the rotating speed range of the bonding machine is set at 3500 rpm of 1500-; the bonding time is set in the range of 1-5 minutes, more preferably 2-5 minutes;
further specifically, preferably, in this embodiment, the thermal bonding process includes the following operation steps:
s10), placing the powder coating base powder composition in a bonding machine;
s20), when the bonding machine reaches the bonding temperature, adding noctilucent powder into the bonding machine to enable noctilucent powder particles to be bonded and compounded on the surfaces of the powder coating base powder composition particles; preferably, the bonding temperature is 5-20 ℃, preferably 5-10 ℃ higher than the glass transition temperature of the powder coating base powder composition, which is beneficial to realizing efficient thermal bonding effect on the noctilucent powder;
s30), taking the powder coating with the optical energy storage effect out of the bonding equipment.
It should be noted that adding the noctilucent powder after the bonding machine reaches the bonding temperature is a preferred embodiment proposed in the present application, which is more favorable for maintaining the characteristics of the noctilucent powder, minimizing the damage to the structure thereof, and further favorable for thermally bonding and compounding the noctilucent powder on the surface of the powder coating base powder composition particles in an efficient and concentrated manner, which is further favorable for the spontaneous light effect of the cured coating thereof.
The embodiment also provides a coating with the light energy storage effect, and the coating is formed by spraying the powder coating on a substrate and then curing. The coating thickness of the embodiment can be specifically selected according to actual needs, and the recommended coating thickness range is 60-120 μm (the test standard is according to ISO 2360 and 2017).
To verify the technical effect of the present application, the following examples and comparative examples were specifically compared as formulation raw materials for powder coating compositions:
example 1: a powder coating composition with light energy storage effect comprises 80 wt% of powder coating base powder composition and 20 wt% of noctilucent powder, wherein the noctilucent powder is bonded and compounded on the particle surface of the powder coating base powder composition through a thermal bonding process; the product model of the noctilucent powder is HL-XP6, and the powder coating base powder composition is prepared from the following raw materials in the following table 1:
TABLE 1 formulation raw materials Table for powder coating base powder composition of example 1
Example 2: the rest of the technical solutions in this example 2 are the same as those in example 1, except that the powder coating composition with the optical energy storage effect in this example 2 comprises 95 wt% of the powder coating base powder composition and 5 wt% of the luminescent powder.
Example 3: the rest of the technical solutions in this example 3 are the same as those in example 1, except that the powder coating composition with the optical energy storage effect in this example 3 includes 90 wt% of the powder coating base powder composition and 10 wt% of the luminescent powder.
Example 4: the rest of the technical solutions in this example 4 are the same as those in example 1, except that the powder coating composition with the optical energy storage effect in this example 4 includes 85 wt% of the powder coating base powder composition and 15 wt% of the luminescent powder.
Example 5: the rest of the technical solutions in this example 5 are the same as those in example 1, except that the powder coating composition with the optical energy storage effect in this example 5 comprises 75 wt% of the powder coating base powder composition and 25 wt% of the luminescent powder.
Example 6: the rest of the technical solutions in this example 6 are the same as those in example 1, except that the powder coating composition with the optical energy storage effect in this example 6 includes 70 wt% of the powder coating base powder composition and 30 wt% of the luminescent powder.
Example 7: the remaining technical solution of this embodiment 7 is the same as that of embodiment 1, except that in this embodiment 7, the noctilucent powder with the product type of YG-4126 is used instead of the noctilucent powder with the product type of HL-XP6 in embodiment 1.
Example 8: the remaining technical solution of this example 8 is the same as that of example 1, except that in this example 8, 06970355 pure epoxy series powder coating product manufactured by tiger corporation is used instead of the powder coating base powder composition of example 1.
Example 9: the remaining technical solution of this example 9 is the same as that of example 1, except that in this example 9, 00911448 epoxy-polyester series powder coating products manufactured by tiger corporation are used instead of the powder coating base powder composition in example 1.
Example 10: the remaining technical solution of this example 10 is the same as that of example 1, except that in this example 10, 05972507 polyester-HAA series powder coating products manufactured by Tiger company are used instead of the powder coating base powder composition of example 1.
Example 11: the remaining technical solution of this example 11 is the same as that of example 1, except that in this example 11, 25000108C1 acrylic powder coating product manufactured by Tiger company is used instead of the powder coating base powder composition of example 1.
Example 12: the remaining technical solution of this example 12 is the same as that of example 1, except that in this example 12, 08670165 fluorocarbon series powder coating products manufactured by tiger corporation are used instead of the powder coating base powder composition in example 1.
Comparative example 1: the other technical scheme of the comparative example 1 is the same as that of the example 1, except that in the comparative example 1, the noctilucent powder and the powder coating base powder composition are mixed into a whole through a melt coextrusion process.
Comparative example 2: the remaining technical solution of the comparative example 2 is the same as that of the example 1, except that in the comparative example 2, the noctilucent powder and the powder coating base powder composition are mixed into a whole by dry mixing.
The application provides powder coating compositions prepared respectively for the above examples 1-12 and comparative examples 1-2, wherein coatings are respectively obtained after spraying and curing on aluminum substrates with the same specification (the curing conditions can be selected according to the adaptive resin curing conditions in a conventional manner), and the coatings are subjected to optical energy storage effect test comparison, and the optical energy storage effect test conditions adopt: each of the aluminum substrates having a coating layer was placed in a color comparison box, irradiated by using 2D 65 light source tubes each having a power of 20W, and after irradiating the coating layer for 1 hour, placed in a light-tight dark room, and the self-luminous effect and the self-luminous time of each coating layer were observed by the naked human eye at intervals of 10 minutes. The test results of the optical energy storage effect are shown in the following table 2:
table 2 comparison table for testing optical energy storage effect of each embodiment and each proportion of the application
The term "strong" in table 2 above means that the self-luminous effect of the coating can be observed significantly, and the difference from the black environment is strong; the term "strong" means that the self-luminous effect of the coating can be observed obviously, and the difference between the self-luminous effect and the black environment is obvious; "weak" means that the self-luminous effect of the coating is observed, and has no obvious difference from the black environment; "very weak" means that the self-luminous effect of the coating can be observed implicitly, and is almost not different from the black environment; "none" means that no self-luminous effect of the coating is observed, no difference from the black environment.
It should be noted that HAA in the present application is an english abbreviation of β -hydroxyalkylamide, and chinese means β -hydroxyalkylamide; TGIC is referred to as Triglycidyl isocyanurate, the English abbreviation of Triglycidyl isocyanurate and Chinese meaning Triglycidyl isocyanurate.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The powder coating composition with the light energy storage effect is characterized by comprising a powder coating base powder composition and noctilucent powder, wherein the noctilucent powder is bonded and compounded on the surfaces of particles of the powder coating base powder composition through a thermal bonding process.
2. A powder coating composition as claimed in claim 1, wherein the luminescent powder is present in an amount of not less than 5% by weight of the powder coating base powder composition.
3. A powder coating composition as claimed in claim 1, wherein the luminescent powder is present in the powder coating base powder composition in a proportion by weight in the range of from 10 to 25 wt%.
4. A powder coating composition as claimed in claim 1, wherein the mean particle size of the luminescent powder is in the range of 8 to 30 microns.
5. The powder coating composition of claim 1, wherein the powder coating primer composition comprises a thermosetting resin and a curing agent for cross-linking and curing the thermosetting resin.
6. A powder coating composition as claimed in claim 5, wherein the thermosetting resin comprises an epoxy resin and/or a polyester resin and/or an acrylic resin and/or a fluorocarbon resin.
7. A method for preparing a powder coating composition according to any of claims 1-6, characterized in that in the thermal bonding process, after the bonding machine has reached the bonding temperature, the speed of the bonding machine is set in the range of 1500-3500 rpm, and the bonding time is set in the range of 1-5 minutes.
8. A process for preparing a powder coating composition according to any one of claims 1 to 6, wherein the thermal bonding process comprises the following operating steps:
s10), placing the powder coating base powder composition in a bonding machine;
s20), when the bonding machine reaches the bonding temperature, adding the noctilucent powder into the bonding machine to enable noctilucent powder particles to be bonded and compounded on the surfaces of the powder coating base powder composition particles;
s30), taking out the powder coating with the light energy storage effect from the bonding equipment.
9. A method of manufacturing as claimed in claim 7 or 8, wherein the bonding temperature is 5-20 ℃ above the glass transition temperature of the powder coating primer composition.
10. Coating with an optical energy storage effect, characterized in that a substrate is spray-coated with a powder coating according to any of claims 1 to 7 and then cured to form the coating.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276740A (en) * | 2021-11-22 | 2022-04-05 | 科浦勒塑料粉末(佛山)有限公司 | Weather-resistant light energy storage metal powder coating and preparation method thereof |
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2020
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| CN114276740A (en) * | 2021-11-22 | 2022-04-05 | 科浦勒塑料粉末(佛山)有限公司 | Weather-resistant light energy storage metal powder coating and preparation method thereof |
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Application publication date: 20210430 |