CN113897105A - Single-component matte water-based varnish for graffiti film and preparation method thereof - Google Patents
Single-component matte water-based varnish for graffiti film and preparation method 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
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D7/42—Gloss-reducing agents
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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
- C09D7/65—Additives macromolecular
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a single-component matte water-based varnish for a doodling film, which comprises the following components in percentage by weight: 400 parts of water 230-containing organic matting agent, 3-5 parts of bactericide, 3-5 parts of mildew preventive, 1-3 parts of defoaming agent, 0.5-4 parts of surfactant, 0.5-10 parts of dispersant, 5-20 parts of thickener, 0.5-3 parts of pH regulator, 80-300 parts of low film-forming temperature aqueous resin, 400 parts of high film-forming temperature aqueous resin, 10-60 parts of special auxiliary agent and 0.5-15 parts of special organic matting powder. By compounding two emulsions which are self-crosslinked at room temperature and have different glass transition temperatures, the balance between low VOC, film forming performance and excellent anti-graffiti performance is solved; the balance between the ultralow VOC and the film forming performance is realized by using the special auxiliary agent; the special extinction powder is matched with the dispersing agent, so that the balance of scrawling resistance and luster under the matte price adjustment is solved, and the storage stability is excellent.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a single-component matte water-based varnish for a graffiti film and a preparation method thereof.
Background
The childhood period is an important period for intelligence development and artistic ability germination, and one main expression form is graffiti which is very beneficial to developing intelligence. The graffiti-resistant film coated on the site is produced by brushing a white board on the wall on the site under the condition of not influencing indoor decoration, and the graffiti-resistant film can be produced in any size, can be produced in one piece, can be a wall or even can be a room for children to write, calculate and draw at will. The white board and the doodle film are coated and manufactured on site and used for replacing the conventional teaching blackboard and teaching white board. The blackboard writing chalk avoids pollution caused by chalk writing, saves waste caused by purchasing a finished whiteboard and a projection curtain, and is environment-friendly in manufacturing and construction processes. The popularization and application of the water-based doodle film make certain contributions to environmental protection, energy conservation and emission reduction at present when energy is in shortage and the environment is worsened. Meanwhile, the doodle film can also be widely applied to the fields of office walls, production workshops, billboards and the like, and can be used as a white board, a projection curtain and the like. The white board paint is used for painting the billboard in a production workshop, so that the limitation of task writing is reduced, and the accuracy of production communication is ensured.
The common preparation method for the doodle film is mainly high-performance transparent varnish, a film-forming resin system can be divided into polyurethane, polyacrylate, polysiloxane and the like, a solvent type can be divided into a traditional solvent type and a water-based two type, and the solvent type can be divided into a single component, a double component and a multi-component. The high-performance transparent varnish applied to the preparation of the doodle film and the white board meets the environmental protection requirement of on-site painting; secondly, the construction is easy, convenient and fast, and the method has wide adaptability to base materials; long service life is also needed, for example, the surface hardness is high, the paint cannot be peeled off and cracked, and the paint is easy to recoat and renovate; most importantly, the anti-graffiti whiteboard pen has good anti-graffiti performance, and the writing of the whiteboard pen is easy to clean without leaving any trace.
The main problems of the prior art are as follows: 1. environmental protection property: in order to ensure good film-forming properties of conventional transparent varnishes, a large amount of cosolvents or film-forming auxiliaries are usually used, and volatile organic compounds of the cosolvents or film-forming auxiliaries have great influence on human health. When the VOC in a room reaches a certain concentration, people can feel headache, nausea, vomiting, hypodynamia and the like in a short time, and can be convulsion and coma in severe cases, and the liver, the kidney, the brain and the nervous system of people can be injured, so that serious consequences such as hypomnesis are caused. In China, the latest release of the certification requirements of the product of the environmental sign of the water-based interior wall coating by the State environmental protection administration requires that the VOC (volatile organic Compounds) of the interior wall matte finish paint is not higher than 50 grams per liter, and the VOC of the highlight finish paint is not higher than 80 grams per liter. Solvent-based transparent varnish products have been gradually eliminated, and the reduction of VOC in aqueous products, the development of low-VOC and even 'zero-VOC' products is a centralized demand and technical difficulty of the market. Common low-film-forming-temperature resin hardly meets the requirements of surface hardness and anti-graffiti performance, and the water-based resin with higher film-forming temperature needs higher addition of film-forming auxiliary agent to help film formation; in addition, the stimulation and damage of the aqueous isocyanate curing agent on eyes and upper respiratory tract, which are generally adopted by the mainstream two-component transparent varnish product in the market at present: low concentrations cause tearing and coughing, and high concentrations can cause red swelling and chemical burns. It also can destroy nasal mucosa, and cause olfactory loss, and upper respiratory mucosa may cause chemical injury. Concentrations in excess of 50mg/m ^3 can cause edema in the skin and necrosis of the tissue. In addition, it can also cause respiratory tract allergic reactions, aggravate dyspnea and pulmonary edema. Therefore, the graffiti film products applied to the child room decoration and the indoor after-loading market are in urgent need of upgrading the environmental protection performance.
2. Construction property: common double-component doodle varnish products in the market need to be premixed before construction, construction is carried out after on-site stirring, the final construction quality is difficult to control due to the short pot life of a double-component system (within 2-4 hours in common), if high-hydroxyl resin is used, the curing and drying time is long, the rapid curing and use are difficult, and a plurality of paint film defects in on-site stirring construction are difficult to avoid, such as bubbles, shrinkage cavities, fish eyes and the like. The varnish with high graffiti resistance and easy construction is also an outstanding technical difficulty.
3. The application performance is as follows: the final doodling effect and performance are the most main performance indexes for measuring doodling varnish products, and a series of relevant standards and methods in other product fields are used for detecting the stain resistance of the coating, such as HG/T4756 inner wall stain-resistant latex paint, children water-based inner wall paint, children furniture graffiti-resistant detection methods and the like.
4. Gloss: in the process of preparing the water-based matte doodle film, in order to achieve the final matte effect (the 60-degree gloss is less than 10), a certain amount of matting assistant is usually added into the formula, and the matting powder for common water-based varnish is an inorganic functional filler, such as diatomite, kaolin, fumed silica and the like. When the coating film is dried, the fine particles form a fine rough surface on the surface of the coating film, and the reflection of light is reduced to obtain a matte appearance. The matting agents have the problems of difficult dispersion, easy sedimentation in the storage process, low film-forming transparency, poor surface effect and the like, and most importantly, the porous inorganic matting powder greatly influences the final graffiti effect and performance. And if the organic suspension type flatting agent such as the delustering wax is adopted, after the coating construction is finished, the wax in the coating film is separated along with the evaporation of the solvent, so that the coating film can be endowed with better hand feeling and anti-fouling performance. However, the wax layer also inhibits evaporation of water and permeation of gas after the coating film is formed on the surface, and affects the drying and recoating properties of the coating film.
The present application thus provides a one-component matte water varnish for graffiti films and a process for the preparation thereof.
Disclosure of Invention
The invention aims to provide a single-component matte water-based varnish for a doodle film and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: the single-component matte water-based varnish for the scrawling film comprises the following components in percentage by weight: 400 parts of water 230-containing organic matting agent, 3-5 parts of bactericide, 3-5 parts of mildew preventive, 1-3 parts of defoaming agent, 0.5-4 parts of surfactant, 0.5-10 parts of dispersant, 5-20 parts of thickener, 0.5-3 parts of pH regulator, 80-300 parts of low film-forming temperature aqueous resin, 400 parts of high film-forming temperature aqueous resin, 10-60 parts of special auxiliary agent and 0.5-15 parts of special organic matting powder.
Preferably, the single-component matte water-based varnish for the doodle film comprises the following components in parts by weight: 300 parts of water, 4 parts of bactericide, 4 parts of mildew preventive, 2 parts of defoamer, 3 parts of surfactant, 8 parts of dispersant, 18 parts of thickener, 4 parts of pH regulator, 200 parts of low film-forming temperature aqueous resin, 300 parts of high film-forming temperature aqueous resin, 50 parts of special assistant and 10 parts of special organic matting powder.
Preferably, the low film-forming temperature water-based resin is acrylate copolymer emulsion, polyurethane dispersion or water-based acrylate polyurethane hybrid emulsion, and has good film-forming performance, excellent surface hardness and excellent stain resistance.
Further preferably, the aqueous acrylate copolymer emulsion comprises, but is not limited to, Opadry AC2025, AC2360, AC2403, AC2523, AC2518, AC2736/2737/2739, Dismann XK-98, Dow chemical TX-100, TX-010, SF268 and SF 155.
Preferably, the high film-forming temperature water-based resin is acrylate copolymer emulsion, polyurethane dispersion or water-based acrylate polyurethane hybrid emulsion, and has excellent surface hardness, chemical resistance and graffiti resistance.
Further preferably, the aqueous acrylate copolymer emulsion comprises, but is not limited to, Opadry AC2742, AC3626, AC3640, AC3660 or Dismanty XK-12, XK-14, XK-15, XK252 Dow chemical AC-818, DS-K2, DS-12;
preferably, the low film-forming temperature aqueous resin and the high film-forming temperature aqueous resin are subjected to a crosslinking reaction in a film-forming process through an ambient temperature self-crosslinking reaction, and the self-crosslinking functional group includes, but is not limited to, room temperature self-crosslinking of N-methylolacrylamide and derivatives thereof, room temperature hydrolytic polycondensation self-crosslinking of siloxane, room temperature self-crosslinking based on an epoxy group and room temperature self-oxidative crosslinking of double bonds in unsaturated fatty acids, ketocarbonyl and hydrazide-based crosslinking systems, acetoacetyl and polyamine-based crosslinking systems, aziridinyl and carboxyl crosslinking systems, and isocyanate and polyamine crosslinking systems.
Preferably, the thickening agent is a polyacrylic thickening agent, a polyurethane thickening agent or an associated thickening agent; more preferably, the polyurethane thickener is any one of SN-612, Dow RM8W, RM12W, RM-2020 and Haimines 299; the thickener has the functions of ensuring that the single-component matte water-based varnish for the scrawling film has proper shear viscosity and excellent splashing resistance in dispersion, and simultaneously ensuring that the varnish has excellent tank opening effect and has excellent sagging resistance and leveling property in the construction process;
preferably, the dispersant is an organic polymer dispersant or a hydrophobically modified polycarboxylate dispersant, and in a dispersion system, an adsorption double electric layer can be uniformly formed on the surface of a material, so that the tendency of secondary flocculation of particles is reduced, and the storage stability of the coating is improved.
Preferably, the defoaming agent is mineral oil defoaming agent, organic lipid defoaming agent, silicone defoaming agent or siloxane defoaming agent.
Further preferably, the silicone-based defoaming agent is any one of BYK024, BKY028 or Tego 810, and the function of the defoaming agent is to impart excellent storage defoaming property and excellent construction defoaming property to the finished paint
Preferably, the matting powder is organic matting powder, further preferably, the organic matting powder is 5-30 micron polymer type organic matting powder, polyacrylate and polystyrene type organic matting powder, the refractive index of the organic matting powder is close to that of the bulk resin, the transparency is high after film forming, the organic matting powder is easy to disperse, and the graffiti resistance after final film forming is facilitated.
A preparation method of single-component matte water-based varnish for a graffiti film comprises the following steps:
step one, adding water, a bactericide and a mildew preventive into a dispersion machine according to the weight part ratio of raw materials of the single-component matte water-based varnish for the graffiti film, and stirring and dispersing at a first rotating speed;
setting the rotating speed of a dispersion machine as a second rotating speed, and sequentially adding a defoaming agent, a surfactant, a dispersing agent and organic matting powder;
setting the rotating speed of the dispersion machine as a third rotating speed, and sequentially adding the special auxiliary agent, the pH regulator, the low film-forming temperature water-based resin and the high film-forming temperature water-based resin to stir and disperse;
and step four, uniformly mixing the thickening agent and water, adding the mixture into a dispersing machine, and stirring and dispersing at a third rotating speed to obtain the single-component matte water-based varnish for the graffiti film.
Wherein the first rotation speed is 400-500 rpm, the second rotation speed is 1200-1800 rpm, and the third rotation speed is 800-1000 rpm.
Compared with the prior art, the invention has the beneficial effects that: 1) by compounding two emulsions which are self-crosslinked at room temperature and have different glass transition temperatures, the balance between low VOC, film forming performance and excellent anti-graffiti performance is solved;
2) the balance between the ultralow VOC and the film forming performance is realized by using the special auxiliary agent;
3) the special extinction powder is matched with the dispersing agent, so that the balance of scrawling resistance and luster under the matte price adjustment is solved, and the storage stability is excellent.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Referring to fig. 1, the present embodiment provides a technical solution: a preparation method of single-component matte water-based varnish for a graffiti film comprises the following steps:
step one, adding water, a bactericide and a mildew preventive into a dispersion machine according to the weight part ratio of raw materials of the single-component matte water-based varnish for the graffiti film, and stirring and dispersing at a first rotating speed;
setting the rotating speed of a dispersion machine as a second rotating speed, and sequentially adding a defoaming agent, a surfactant, a dispersing agent and organic matting powder;
setting the rotating speed of the dispersion machine as a third rotating speed, and sequentially adding the special auxiliary agent, the pH regulator, the low film-forming temperature water-based resin and the high film-forming temperature water-based resin to stir and disperse;
and step four, uniformly mixing the thickening agent and water, adding the mixture into a dispersing machine, and stirring and dispersing at a third rotating speed to obtain the single-component matte water-based varnish for the graffiti film.
Wherein the first rotation speed is 400-500 rpm, the second rotation speed is 1200-1800 rpm, and the third rotation speed is 800-1000 rpm.
Wherein, the raw materials of the examples 1 to 3 and the comparative examples 1 to 5 are shown in the following table 1 in parts by weight:
TABLE 1
Each of examples and comparative examples was prepared according to a method for preparing a single-component matte aqueous varnish for a graffiti film, and the prepared graffiti film was subjected to performance testing using the single-component matte aqueous varnish, the performance testing results of which are shown in Table 2:
TABLE 2
Thus, the single-component matte water-based varnish for the graffiti film prepared in the examples 1 to 3 has high surface transparency, strong glossiness, no VOC and better graffiti resistance, and solves the balance among low VOC, film-forming property and excellent graffiti resistance; the special extinction powder is matched with the dispersing agent, so that the balance of scrawling resistance and luster under the matte price adjustment is solved, and the storage stability is excellent.
Those not described in detail in this specification are within the skill of the art.
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 (10)
1. The single-component matte water-based varnish for the doodling film is characterized in that: the single-component matte water-based varnish for the scrawling film comprises the following components in percentage by weight: 400 parts of water 230-containing organic matting agent, 3-5 parts of bactericide, 3-5 parts of mildew preventive, 1-3 parts of defoaming agent, 0.5-4 parts of surfactant, 0.5-10 parts of dispersant, 5-20 parts of thickener, 0.5-3 parts of pH regulator, 80-300 parts of low film-forming temperature aqueous resin, 400 parts of high film-forming temperature aqueous resin, 10-60 parts of special auxiliary agent and 0.5-15 parts of special organic matting powder.
2. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the single-component matte water-based varnish for the scrawling film comprises the following components in percentage by weight: 300 parts of water, 4 parts of bactericide, 4 parts of mildew preventive, 2 parts of defoamer, 3 parts of surfactant, 8 parts of dispersant, 18 parts of thickener, 4 parts of pH regulator, 200 parts of low film-forming temperature aqueous resin, 300 parts of high film-forming temperature aqueous resin, 50 parts of special assistant and 10 parts of special organic matting powder.
3. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the low film-forming temperature water-based resin is acrylate copolymer emulsion, polyurethane dispersion or water-based acrylate polyurethane hybrid emulsion, wherein the water-based acrylate copolymer emulsion comprises but is not limited to European Teddy AC2025, AC2360, AC2403, AC2523, AC2518, AC2736/2737/2739, Disemann XK-98, Dow chemical TX-100, TX-010, SF268 and SF 155.
4. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the high film-forming temperature water-based resin is acrylate copolymer emulsion, polyurethane dispersion or water-based acrylate polyurethane hybrid emulsion, wherein the water-based acrylate copolymer emulsion comprises but is not limited to European Teddy AC2742, AC3626, AC3640, AC3660 or Disemann XK-12, XK-14, XK-15, XK252 Tao's chemical AC-818, DS-K2 and DS-12.
5. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the low film-forming temperature water-based resin and the high film-forming temperature water-based resin are subjected to a crosslinking reaction in a film-forming process through a normal-temperature self-crosslinking reaction, and self-crosslinking functional groups include but are not limited to room-temperature self-crosslinking of N-methylolacrylamide and derivatives thereof, room-temperature hydrolysis polycondensation self-crosslinking of siloxane, room-temperature self-crosslinking based on epoxy groups and room-temperature self-oxidation crosslinking of double bonds in unsaturated fatty acids, ketone carbonyl and hydrazide crosslinking systems, acetoacetyl and polyamine crosslinking systems, aziridinyl and carboxyl crosslinking systems, and isocyanate and polyamine crosslinking systems.
6. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the thickening agent adopts polyacrylic acid thickening agent, polyurethane thickening agent or association type thickening agent; wherein the polyurethane thickener is any one of SN-612, Dow RM8W, RM12W, RM-2020 and Haimines 299.
7. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the dispersant is an organic polymer dispersant or a hydrophobic modified polycarboxylate dispersant.
8. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the defoaming agent is mineral oil defoaming agent, organic lipid defoaming agent, silicone defoaming agent or siloxane defoaming agent, wherein the silicone defoaming agent is any one of BYK024, BKY028 or TeGo 810.
9. The single-component matte water-based varnish for the doodle film, according to claim 1, characterized in that: the matting powder is organic matting powder, wherein the organic matting powder is 5-30 micron polymer type organic matting powder, polyacrylate and polystyrene type organic matting powder.
10. A preparation method of single-component matte water-based varnish for a graffiti film is characterized by comprising the following steps: in particular to
The method comprises the following steps: step one, adding water, a bactericide and a mildew preventive into a dispersion machine according to the weight part ratio of raw materials of the single-component matte water-based varnish for the graffiti film, and stirring and dispersing at a first rotating speed;
setting the rotating speed of a dispersion machine as a second rotating speed, and sequentially adding a defoaming agent, a surfactant, a dispersing agent and organic matting powder;
setting the rotating speed of the dispersion machine as a third rotating speed, and sequentially adding the special auxiliary agent, the pH regulator, the low film-forming temperature water-based resin and the high film-forming temperature water-based resin to stir and disperse;
step four, uniformly mixing the thickening agent with water, adding the mixture into a dispersing machine, and stirring and dispersing at a third rotating speed to obtain the single-component matte water-based varnish for the graffiti film;
wherein the first rotation speed is 400-500 rpm, the second rotation speed is 1200-1800 rpm, and the third rotation speed is 800-1000 rpm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116376427A (en) * | 2023-04-03 | 2023-07-04 | 福融新材料(江苏)有限公司 | Scratch-resistant multilayer composite matte film and preparation process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107573790A (en) * | 2017-09-15 | 2018-01-12 | 上海伯栎新材料科技有限公司 | One kind scribble film one pack system dumb light water varnish and preparation method thereof |
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2021
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107573790A (en) * | 2017-09-15 | 2018-01-12 | 上海伯栎新材料科技有限公司 | One kind scribble film one pack system dumb light water varnish and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116376427A (en) * | 2023-04-03 | 2023-07-04 | 福融新材料(江苏)有限公司 | Scratch-resistant multilayer composite matte film and preparation process thereof |
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