CN110684460A - Low-cost high-wear-resistance UV (ultraviolet) curing coating and preparation method and application thereof - Google Patents
Low-cost high-wear-resistance UV (ultraviolet) curing coating and preparation method and application thereof Download PDFInfo
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention relates to a low-cost high-wear-resistance UV curing coating, and a preparation method and application thereof, wherein the low-cost high-wear-resistance UV curing coating comprises the following components in percentage by weight: 20-35% of 6-functional polyurethane acrylate; 3-8% of 9-15 functional polyurethane acrylate; 0.7-1% of nano powder; 0.5-1% of anti-fingerprint auxiliary agent; 0.3-1% of a leveling agent; 0.2 to 2 percent of stabilizer; 0.5 to 2 percent of photoinitiator; 50 to 75 percent of solvent. And the wear-resistant UV curing coating is sprayed, sprayed or manually coated on the PMMA surface of the PMMA/PC composite base material, so that the wear resistance of the surface of the PMMA/PC plate is enhanced. After the low-cost high-wear-resistance UV curing coating is cured by UV ultraviolet light, a tough coating layer can be formed on the surface of the PMMA/PC composite substrate, the coating has good adhesion to the PMMA/PC composite substrate, high surface hardness, good wear resistance and low cost, can effectively ensure that a product is not easily scratched in the using process, and has the characteristics of good hydrophobicity, oleophobicity and easy cleaning.
Description
Technical Field
The invention relates to the field of ultraviolet curing coatings, in particular to a low-cost high-wear-resistance UV curing coating for the surface of a PMMA/PC composite base material, and a preparation method and application thereof.
Background
With the advent of the 5G era, the rear cover of a mobile phone made of metal is gradually replaced by plastic. The PMMA/PC composite material has high transparency, and a visual vitrification effect can be obtained through surface treatment, so that the PMMA/PC composite material is a poor choice for replacing metal. Unlike the current hotter plastic alloys, PMMA/PC composite panels are composites made by co-extrusion of two raw materials, PMMA and PC. One surface of the PMMA/PC composite board is made of PMMA, has higher hardness and wear resistance, and is used for the outer layer of the mobile phone cover plate; the other surface is made of PC material, the texture is soft, and the PC material is used as an inner layer to improve the toughness of the whole material. However, the hardness and the wear resistance of the PMMA/PC composite base material are difficult to meet the market requirements only by means of hardness and wear resistance of the PMMA/PC composite base material, so that the hardness and the wear resistance of the PMMA/PC composite base material can be effectively improved by means of hardening treatment of the surface of the composite base material.
The UV coating has the advantages of simple process, convenient operation, high construction speed, environmental protection, economy and the like, is widely applied to the modern society, and can effectively improve the hardness and the wear resistance when being used for the surface hardening treatment of the PMMA/PC composite base material. However, the hardness and abrasion resistance of the existing UV coating cannot meet the increasing market demand, and particularly, the steel wool friction resistance needs to be further improved.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an abrasion-resistant UV curing coating, and a preparation method and application thereof. The low-cost high-wear-resistant UV curing coating provided by the invention is a UV ultraviolet curing UV coating with high hardness, good wear resistance and low cost, and aims to solve the problem of hardness and wear resistance of the existing UV ultraviolet curing coating hardened PMMA/PC composite base material.
In order to achieve the purpose, the invention adopts the following technical scheme:
the low-cost high-wear-resistance UV curing coating comprises the following components in percentage by weight:
20-35% of 6-functional polyurethane acrylate; 3-8% of 9-15 functional polyurethane acrylate; 0.7-1% of nano powder; 0.5-1% of anti-fingerprint auxiliary agent; 0.3-1% of a leveling agent; 0.2 to 2 percent of stabilizer; 0.5 to 2 percent of photoinitiator; 50 to 75 percent of solvent.
In the above technical solution, further, the preferable functionality of the 9-15 urethane acrylate is 9-12.
Further, the nano powder is nano calcium carbonate, nano aluminum oxide, nano silicon powder, quartz powder and the like; the anti-fingerprint auxiliary agent is a fluorine-containing acrylic compound.
Further, the leveling agent is organic silicon modified polyacrylate (with functional hydroxyl), polyether modified polydimethylsiloxane, polyether modified siloxane, organic silicon modified polyacrylic acid polymer, polysiloxane-polyether copolymer and the like.
Further, the stabilizer is one or two of a urethane copolymer, a high molecular weight block copolymer, an unsaturated polycarboxylic acid modified polysiloxane, a high molecular acid ester polymer, and the like.
Further, the photoinitiator is any one or two of (2-ethylhexyl) peroxydicarbonate hydroxyl (EHP), phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide (819), cyclohexylphenyl ketone (IRGACURE 184), 2-hydroxy-2-methyl-1-phenyl-1-propanone (DAROCUR 1173), 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide (TPO), and the like.
Further, the solvent is two to five of ethyl acetate, butyl acetate, acetone, methyl isobutyl ketone, diisobutyl ketone, propylene glycol methyl ether acetate, dipropylene glycol methyl ether, propylene glycol methyl ether, isopropyl alcohol, and the like.
The invention also provides a preparation method of the wear-resistant UV curing coating, which comprises the following steps: adding the nano powder, the stabilizer and the solvent into a container according to the weight percentage, stirring for 10-20min at the rotating speed of 1000-2000 r/min, then performing ultrasonic treatment for 10-30min, adding the anti-fingerprint auxiliary agent, stirring for 10-20min at the rotating speed of 1000-2000 r/min, adding the leveling agent, stirring for 10-20min at the rotating speed of 1000-2000 r/min, and performing ultrasonic treatment for 10-20 min; the 6-functional polyurethane acrylate and the 9-15-functional polyurethane acrylate are mixed uniformly with the solvent. And uniformly mixing the two, adding a photoinitiator, and stirring at the rotating speed of 1000-2000 r/min for 10-30min to obtain the wear-resistant UV curing coating.
The invention also provides an application of the wear-resistant UV curing coating, wherein the coating is applied to the PMMA surface of the PMMA/PC composite substrate, and the specific method comprises the following steps: spraying the coating on the PMMA surface of the PMMA/PC composite substrate, and baking for 3-5min at the temperature of 60-70 ℃; UV curing energy: 1000 to 2100mj/cm2。
According to the invention, the nano-powder is added, and the content of the nano-powder is respectively controlled within the range of 0.7-1%, so that a tough coating layer can be formed on the surface of the PMMA/PC composite substrate after the UV curing coating is cured by UV ultraviolet light, the hardness of the PMMA surface can reach 1Kg force of 5H, the hardness of the PC surface can reach 1Kg force of H, and the wear resistance is excellent.
And (3) wear resistance test: the surface condition was visually inspected under light by rubbing the coating with 1kg, 0000# steel wool, phi 1cm, a grinder head, to and fro 10000 times. Through testing, the wear-resistant UV curing coating prepared by the invention has no scratch on the surface after being rubbed.
Compared with the prior art, the invention has at least the following beneficial effects:
the wear-resistant UV curing coating provided by the invention is sprayed on the PMMA surface of the PMMA/PC composite base material, and after being cured by a UV curing machine, a tough wear-resistant paint film can be formed on the surface of the PMMA/PC composite base material, the wear-resistant UV curing coating has good adhesion to the PMMA/PC composite base material, excellent bending performance and high surface hardness: 1Kg of force on PMMA up to 5H; the PC can reach 1Kg force 1H, and the wear resistance is good: the steel wool friction resistance can reach more than 10000 without scratches. In addition, the wear-resistant UV curing coating has the advantages of low odor, no methylbenzene, no halogen, no heavy metal and the like, meets the RoHS standard, and has small harm to the environment.
In the prior art, the hardness/wear resistance of the material is generally improved by adopting a large amount of high-functional resin (the mass fraction is 20-40%, and the functionality is more than 6), but the material can only be worn for 3000 times, the cost is greatly increased, and the coating is easy to crack. The invention reduces the dosage (mass fraction is 3-8%) of the high-functional resin (9-15 functional polyurethane acrylate) by adding a proper amount of nano powder and anti-fingerprint auxiliary agent in the formula for the first time, thereby effectively reducing the coating cost; and the components can generate a synergistic effect, so that the wear resistance of the coating is remarkably improved (the wear resistance reaches 10000 times).
Drawings
FIG. 1 is an initial hydrophobic angle for different coatings;
FIG. 2 shows the surface condition of the coating after 10000 times of steel wool friction.
Detailed Description
The invention provides a wear-resistant UV curing coating and a preparation method and application thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and more clear. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The wear-resistant UV curing coating provided by the invention is a protective coating for PMMA/PC composite base materials, can be used for hardening and wear resistance in the use process of a mobile phone back cover product, and has the following advantages:
1. the adhesive force is good, the surface hardness is high, the wear resistance is good, the bending performance is excellent, the smoothness is good, and the stain resistance is good;
2. low odor, no toluene, no halogen, no heavy metal, and meets RoHS standard.
Examples 1 to 3
The wear-resistant UV curing coating comprises the following components in percentage by weight as shown in Table 1:
TABLE 1
The preparation method of the wear-resistant coating specifically comprises the following steps:
weighing the raw materials according to the formula of the wear-resistant coating, adding the nano calcium carbonate powder, the stabilizer and the 30% ethyl acetate solvent into a container according to the weight percentage, stirring for 10-20min at the rotating speed of 1500r/min, then carrying out ultrasonic treatment for 10-30min, adding the anti-fingerprint auxiliary agent, stirring for 10-20min at the rotating speed of 1500r/min, adding the leveling agent, stirring for 10-20min at the rotating speed of 1500r/min, and carrying out ultrasonic treatment for 10-20 min; mixing the hexafunctional polyurethane acrylate, the nonafunctional polyurethane acrylate and 30% isopropanol solvent uniformly. And uniformly mixing the two, adding a photoinitiator, and stirring at the rotating speed of 1500r/min for 10-30min to obtain the wear-resistant UV curing coating.
The wear-resistant UV curing coating is sprayed on the PMMA surface of the PMMA/PC composite substrate and baked for 3-5min at 70 ℃; then the passing energy is 1000-2100 mJ/cm2The uv curing machine of (1) was allowed to cure to form a clear paint film, and the physical testing was carried out on the painted surface, the results of which are shown in table 2.
Comparative examples 1 to 3:
the fabrication process was the same as example 1, the formulation composition is shown in table 1, and the test results are shown in table 2.
The initial water drop angle, oil drop angle, abrasion resistance, hardness, adhesion, light transmittance, haze, and gloss of the coatings obtained in examples 1 to 3 and comparative examples 1 to 3 were measured, and the results are shown in table 2.
Table 2: physical property test meter for painted surface
As can be seen from Table 2, the wear-resistant UV curing coating prepared in the embodiments 1-3 is tested to have wear resistance of 10000 times of reciprocating friction on the coating by using 1Kg and 0000# steel wool and a phi 1cm grinding head, and the hardness of the PMMA substrate can reach 1Kg force of 5H, and has excellent hydrophobic and oleophobic properties, good toughness, light transmittance, haze and the like. In comparative examples 1 to 3, scratches were present after 10000 times of grinding, and the hardness was also reduced in comparative examples 1 and 2. Compared with the existing wear-resistant coating on the market, the wear-resistant water-repellent oil-repellent coating has obvious advantages in wear resistance and water-repellent oil-repellent property.
In FIG. 1, (1) is the initial hydrophobic angle of example 1; (2) initial hydrophobic angle for comparative example 1; (3) the initial hydrophobic angle is the initial hydrophobic angle of the existing wear-resistant product on the market; it can be seen from the figure that the initial hydrophobic angle of the coating prepared by the example of the present invention is superior to that of the comparative example and the existing product in the market;
in FIG. 2, (1) shows the surface condition of the steel wool coating of example 1 after 10000 times of friction; (2) 10000 times of steel wool friction of the coating surface condition in comparative example 1; (3) the surface condition of the coating is 10000 times of steel wool friction of the existing wear-resistant product in the market; it can be seen from the figure that the scratch of the existing product in the market is very serious, and the requirement of high wear resistance can not be met at all, while the obvious scratch of the anti-fingerprint auxiliary agent is not added in the comparative example 1, which shows that the anti-fingerprint auxiliary agent has an effect of improving the wear resistance, and the scratch of the example 1 shows that the wear resistance of the coating can reach the best through the synergistic effect of the high-functionality resin, the nano powder, the anti-fingerprint auxiliary agent and the 6-functionality resin.
In conclusion, the low-cost high-wear-resistance UV curing coating is coated on the PMMA surface of the PMMA/PC composite base material in a spraying manner, and after the coating is cured by the UV curing machine, a tough paint film can be formed on the surface of the composite base material, so that the coating has the advantages of good adhesive force, high surface hardness and good wear resistance, and the product is effectively prevented from being scratched in the using process. In addition, the wear-resistant UV curing coating has the advantages of low odor, no toluene, no halogen, no heavy metal, accordance with RoHS standard, and little harm to the environment.
The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (9)
1. The low-cost high-wear-resistance UV curing coating is characterized by comprising the following components in percentage by weight: 20-35% of 6-functional polyurethane acrylate; 3-8% of 9-15 functional polyurethane acrylate; 0.7-1% of nano powder; 0.5-1% of anti-fingerprint auxiliary agent; 0.3-1% of a leveling agent; 0.2 to 2 percent of stabilizer; 0.5 to 2 percent of photoinitiator; 50 to 75 percent of solvent.
2. The low-cost high abrasion resistant UV curable coating according to claim 1, wherein said 9-15 functional urethane acrylate has a functionality of 9-12.
3. The low-cost high-wear-resistance UV-curable coating according to claim 1, wherein the nano powder is nano calcium carbonate, nano alumina, nano silica powder or quartz powder, and the anti-fingerprint auxiliary agent is a fluorine-containing acrylic compound.
4. The low-cost high-wear-resistance UV-curable coating according to claim 1, wherein the leveling agent is a hydroxyl-containing silicone-modified polyacrylate, a polyether-modified polydimethylsiloxane, a polyether-modified siloxane, a silicone-modified polyacrylic polymer or a polysiloxane-polyether copolymer.
5. The low-cost high-abrasion-resistance UV-curable coating according to claim 1, wherein the stabilizer is one or two of a urethane copolymer, a high molecular weight block copolymer, an unsaturated polycarboxylic acid modified polysiloxane, and a high molecular acid ester polymer.
6. The low-cost high abrasion-resistant UV-curable coating according to claim 1, wherein said photoinitiator is any one or two of (2-ethylhexyl) peroxydicarbonate hydroxy, phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide, cyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, and 2,4,6 (trimethylbenzoyl) diphenylphosphine oxide.
7. The low-cost high-wear-resistance UV-curable coating according to claim 1, wherein the solvent is two to five of ethyl acetate, butyl acetate, acetone, methyl isobutyl ketone, diisobutyl ketone, propylene glycol methyl ether acetate, dipropylene glycol methyl ether, propylene glycol methyl ether and isopropanol.
8. The method for preparing the low-cost high-abrasion-resistance UV-curable coating according to any one of claims 1 to 7, comprising the steps of: adding the nano powder, the stabilizer and the solvent into a container according to the weight percentage, stirring for 10-20min at the rotating speed of 1000-2000 r/min, then performing ultrasonic treatment for 10-30min, adding the anti-fingerprint auxiliary agent, stirring for 10-20min at the rotating speed of 1000-2000 r/min, adding the leveling agent, stirring for 10-20min at the rotating speed of 1000-2000 r/min, and performing ultrasonic treatment for 10-20 min; uniformly mixing 6-functional polyurethane acrylate, 9-15-functional polyurethane acrylate and a solvent; and uniformly mixing the two, adding a photoinitiator, and stirring at the rotating speed of 1000-2000 r/min for 10-30min to obtain the low-cost high-wear-resistant UV curing coating.
9. The use of a wear-resistant UV-curable coating according to any of claims 1 to 7, wherein the coating is applied to the PMMA surface of a PMMA/PC composite substrate by: spraying the coating on the PMMA surface of the PMMA/PC composite substrate, and baking for 3-5min at the temperature of 60-70 ℃; UV curing energy: 1000 to 2100mj/cm2。
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| CN111823675A (en) * | 2020-07-29 | 2020-10-27 | 西南科技大学 | Composite board based on PMMA/PC and preparation method and application thereof |
| CN113150677A (en) * | 2021-04-12 | 2021-07-23 | 广州申威新材料科技有限公司 | High-temperature-resistant injection-molding anti-fouling UV coating and preparation method and application thereof |
| CN113549279A (en) * | 2021-07-29 | 2021-10-26 | 三联泵业股份有限公司 | Wear-resistant and corrosion-resistant lining material and wear-resistant and corrosion-resistant pump with same |
| CN114350246A (en) * | 2021-12-23 | 2022-04-15 | 广东立邦长润发科技材料有限公司 | Multifunctional finish paint for SPC (SPC) floor |
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