CN114736590A - UV-cured mirror back protective coating and preparation process thereof - Google Patents
UV-cured mirror back protective coating and preparation process 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
- 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
- C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
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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
- C09D163/10—Epoxy resins modified by unsaturated compounds
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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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- 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
- C09D7/63—Additives non-macromolecular organic
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- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The application relates to the field of coatings, and particularly discloses a UV-cured mirror back protective coating and a preparation process thereof. The UV-cured mirror back protective coating comprises the following raw materials in parts by weight: 10-40 parts of polyester acrylate, epoxy acrylate: 5-20 parts of aliphatic epoxy acrylate, 15-35 parts of aliphatic epoxy acrylate, 5-20 parts of reactive diluent, 1-3 parts of photoinitiator, 0.2-2 parts of polymerization inhibitor, 20-35 parts of pigment and filler, 0.5-1 part of methacrylic acid phosphate, 0.5-1 part of titanate coupling agent, 0.5-1 part of silane coupling agent, 78-12 parts of nano SiO27, 0.5-1 part of nano Al2O37 and 0.5-1 part of stearic acid.
Description
Technical Field
The application relates to the field of coatings, in particular to a UV-cured mirror back protective coating and a preparation process thereof
Background
The aluminum mirror is also called an aluminum-plated glass mirror, an aluminum film is sputtered on the back of the glass in a vacuum mode to serve as a reflecting layer, so that the effect of irradiating a portrait is achieved, a layer of protective coating is coated on the surface of the aluminum mirror, the aluminum mirror is also called mirror back paint, and the mirror back paint can prevent the surface, contacting air, of the aluminum mirror from being oxidized and blackened.
The mirror back paint is generally a photocuring paint, the photocuring paint is a paint which is rapidly cured under the action of illumination, and compared with other types of paints, the photocuring paint has a high curing speed, and can be completely cured within only a few seconds or tens of seconds under the radiation of an ultraviolet lamp with a power of several kilowatts, so that the use requirement of the mirror back paint is met. The light-cured coating can save baking energy and improve the production efficiency of the aluminum mirror.
After the photo-curing coating is coated on the back of the aluminum mirror, the surface of the aluminum is smooth, the binding force between the photo-curing coating and the aluminum surface is difficult to meet the requirement, the photo-curing coating is easy to fall off, certain damage can be caused to the mirror, and the overall aesthetic degree of the mirror can be influenced.
Disclosure of Invention
In order to improve the adhesive force between the photocureable coating and the aluminum surface, the application provides the UV-cured mirror back protective coating and the preparation process thereof.
The application provides a UV-cured mirror back protective coating and a preparation process thereof, and the following technical scheme is adopted:
in a first aspect, the application provides a UV-curable mirror back protective coating, which adopts the following technical scheme:
the UV-cured mirror back protective coating comprises the following raw materials in parts by weight: 10-40 parts of polyester acrylate, epoxy acrylate: 5-20 parts of aliphatic epoxy acrylate, 15-35 parts of aliphatic epoxy acrylate, 5-20 parts of reactive diluent, 1-3 parts of photoinitiator, 0.2-2 parts of polymerization inhibitor, 20-35 parts of pigment and filler, 0.5-1 part of methacrylic acid phosphate, 0.5-1 part of titanate coupling agent, 0.5-1 part of silane coupling agent, and nano SiO27-12 parts of nano Al2O37 to 12 portions of stearic acid and 0.5 to 1 portion of stearic acid.
By adopting the technical scheme, the nano silicon dioxide and the nano aluminum oxide are small in particle, high in surface energy and good in adhesive force to the surface of the aluminum film, the nano silicon dioxide and the nano aluminum oxide are attached to the surface of the aluminum film, so that the roughness of the aluminum film is increased, the binding force between the photocureable coating and the aluminum film is increased, the thixotropy of the coating is improved by the nano silicon dioxide, the coating can be rolled more easily in the roll coating construction process, the splashing condition in the roll coating process is prevented, the wear resistance and the scratch resistance of the paint film are improved to a certain extent, the nano aluminum oxide is used as a filler in the paint film, a layer of compact passivation film can be formed by being attached to the surface of the aluminum film of the aluminum mirror, the paint film such as external water, oxygen and the like in the mirror post-processing process can replace a base material to react with the aluminum film when the paint film is corroded, and the aluminum mirror is protected from being oxidized;
the aluminum mirror is made by covering a layer of thin aluminum-plated film on glass, the aluminum-plated film is very thin, the density is not high, glass micropores with a certain area can leak out, the surface of the glass has rich silicon hydroxyl structures, the siloxane groups of the silane coupling agent and the silicon hydroxyl groups on the surface of the glass can form a Si-O-Si structure, the adhesion force of the coating and the surface of the glass is increased, in addition, the silane coupling agent and the nano silicon dioxide can also form a stable Si-O-Si structure, and the silane coupling agent and the nano aluminum oxide can form a stable Si-O-Al structure, and finally a stable space grid structure is formed, so that the binding force between the coating and the aluminum film is further increased.
The methacrylic acid phosphate can slightly react with the surface of the aluminum metal to form a complex, so that the adhesive force of the coating is enhanced, and meanwhile, the methacrylic acid phosphate has a slight phosphorization effect on the surface of a base material and the water penetration resistance is improved.
The long-chain molecular structure unit of the titanate coupling agent can be chemically crosslinked or physically wound with polymer molecules, and finally, the inorganic filler and the polymer are well combined, so that the compactness of the surface of a paint film is improved, and the stearic acid can reduce the surface energy of an aluminum film and is beneficial to improving the adhesive force of the paint and the aluminum film.
Preferably, the reactive diluent is one or more of tripropylene glycol diacrylate, beta-hydroxyethyl methacrylate and dipropylene glycol diacrylate.
By adopting the technical scheme, the tri-propylene glycol diacrylate, the beta-hydroxyethyl methacrylate or the dipropylene glycol diacrylate ensure low shrinkage rate, good adhesive force and good water resistance of the coating.
Preferably, the photoinitiator is one of 2-hydroxy-2-methyl-1-phenyl acetone and 2-hydroxy-2-methyl-1-phenyl-1 acetone.
By adopting the technical scheme, the 2-hydroxy-2-methyl-1-phenyl acetone is easy to blend with other coating raw materials, and the 2-hydroxy-2-methyl-1-phenyl-1 acetone has the advantages of high initiation rate and yellowing resistance.
Preferably, the polymerization inhibitor is one of benzenediol and benzoquinone.
By adopting the technical scheme, the p-benzoquinone can still be used under the anoxic condition, and both the benzenediol and the p-benzoquinone do not need to be matched with other polymerization inhibitors, so that the polymerization inhibitor has an excellent polymerization inhibition effect.
Preferably, the pigment and filler is one or more of rutile titanium dioxide, talcum powder and kaolin.
By adopting the technical scheme, the rutile titanium dioxide is an excellent white pigment, has high dispersion, high weather resistance, high covering power and excellent stability; the talcum powder has high natural whiteness, generally does not need bleaching by chemical substances, and can improve the whiteness, softness, smoothness and glossiness of the coating; kaolin has good hiding power in the coating.
Preferably, the silane coupling agent is a methacryloyloxy silicone coupling agent.
By adopting the technical scheme, the acryloyloxy on the methacryloyloxy silicone coupling agent is beneficial to the generation of the coating polymerization reaction.
Preferably, the nano SiO2And nano Al2O3The mass ratio of (A) to (B) is 1: 3.
By adopting the technical scheme, the nano SiO2And nano Al2O3When the mass ratio of (A) to (B) is 1:3, the nano particles can be distributed in the coating more uniformly, and the function of the nano particles can be exerted without causing secondary agglomeration.
In a second aspect, the application provides a preparation process of a UV-curable mirror back protective coating, which adopts the following technical scheme:
a preparation process of a UV-cured mirror back protective coating comprises the following preparation steps:
step 1: mixing polyester acrylate, epoxy acrylate and aliphatic epoxy acrylate, and uniformly stirring to obtain a mixture A;
step 2: active diluent, photoinitiator, polymerization inhibitor, pigment and filler, methacrylic acid phosphate, titanate coupling agent, silane coupling agent and nano SiO2Nano Al2O3And sequentially adding stearic acid and the mixture A to mix, and uniformly stirring to obtain the finished product of the UV curing mirror back protective coating.
In summary, the present application has the following beneficial effects:
1. the nano silicon dioxide and the nano aluminum oxide are small in particle and high in surface energy, have good adhesive force to the surface of the aluminum film, are attached to the surface of the aluminum film, increase the roughness of the aluminum film, increase the binding force between the photocuring coating and the aluminum film, improve the thixotropy of the coating, enable the coating to roll on the roller more easily in the roll coating construction process, prevent the splashing condition during roll coating, and improve the wear resistance and the scratch resistance of a paint film to a certain degree. The nano aluminum oxide is used as a filler in a paint film, can be attached to the surface of an aluminum film of the aluminum mirror to form a layer of compact passivation film, and can replace a base material aluminum film to react with the paint film when the paint film is corroded by external water, oxygen and the like in the mirror post-processing process, so that the aluminum mirror is protected from oxidation;
2. the aluminum mirror is made by covering a layer of thin aluminum-plated film on glass, the aluminum-plated film is very thin, the density is not so high, glass micropores with a certain area can leak out, the surface of the glass has rich silicon hydroxyl structures, siloxane groups of the silane coupling agent and the silicon hydroxyl groups on the surface of the glass can form a Si-O-Si structure, the adhesion force of the coating and the surface of the glass is increased, in addition, the silane coupling agent and the nano silicon dioxide can generate a stable Si-O-Si structure and a stable Si-O-Al structure, a stable space grid structure is finally formed, and the bonding force between the coating and the aluminum film is further increased.
Detailed Description
The present application will be described in further detail with reference to examples.
Source of raw materials
The polyester acrylate is from Guangdong Haohao new material Co., Ltd, model CR 890161;
epoxy acrylate was from the Guangdong Hao Hai New Material Co., Ltd, model number HE 421T;
the aliphatic epoxy acrylate is from Sanchen chemical industry Co., Ltd, Nanxiong city, model RU-6127B;
the tripropylene glycol diacrylate is from Henghu trade company, Inc. of Guangzhou city, model TPGDA;
beta-hydroxyethyl methacrylate is from Jining Liduo chemical company, model 11;
dipropylene glycol diacrylate was from Jiangsu New materials Co., Ltd, model 333;
2-hydroxy-2-methyl-1-phenylacetone from Wuhanhao Biotechnology Ltd;
2-hydroxy-2-methyl-1-phenyl-1-propanone was obtained from Shanghai-derived PhylloBiotech Ltd;
gamma- (methacryloyloxy) propyltrimethoxysilane from caruncle morning photonics, ltd;
the titanate coupling agent is from Guangzhou City double chemical engineering technology Co., Ltd, model 101;
the methacrylate phosphate is from Jining Binyao chemical Co., Ltd, model PM-2.
Examples
Examples 1 to 5
A preparation process of a UV-cured mirror back protective coating comprises the following preparation steps:
step 1: mixing polyester acrylate, epoxy acrylate and aliphatic epoxy acrylate, and uniformly stirring to obtain a mixture A;
step 2: active diluent, photoinitiator, polymerization inhibitor, pigment and filler, defoaming agent, methacrylic acid phosphate, titanate coupling agent, silane coupling agent and nano SiO2Nano Al2O3And sequentially adding stearic acid and the mixture A to mix, and uniformly stirring to obtain the finished product of the UV curing mirror back protective coating.
Wherein the active diluent is tripropylene glycol diacrylate, the photoinitiator is 2-hydroxy-2-methyl-1-phenyl acetone, the polymerization inhibitor is benzenediol, the pigment and filler are rutile titanium dioxide, and the silane coupling agent is gamma- (methacryloyloxy) propyl trimethoxy silane.
TABLE 1 materials and amounts (kg) of materials of examples 1-5
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Polyester acrylate | 10 | 15 | 25 | 35 | 40 |
| Epoxy acrylate | 5 | 8 | 12 | 16 | 20 |
| Aliphatic epoxy acrylate | 15 | 20 | 25 | 30 | 35 |
| Reactive diluent | 5 | 10 | 15 | 18 | 20 |
| Photoinitiator | 1 | 3 | 1 | 3 | 1 |
| Polymerization inhibitor | 0.2 | 0.6 | 1 | 1.4 | 2 |
| Pigment and filler | 20 | 24 | 28 | 32 | 35 |
| Methacrylic acid phosphoric ester | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Titanate coupling agent | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Silane coupling agent | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Nano SiO2 | 7 | 7 | 7 | 7 | 7 |
| Nano Al2O3 | 7 | 7 | 7 | 7 | 7 |
| Stearic acid | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
Example 6
A UV-curable mirror-back protective coating, which differs from example 4 in that the reactive diluent is beta-hydroxyethyl methacrylate.
Example 7
A UV-curable mirror back protective coating that differs from example 4 in that the reactive diluent is dipropylene glycol diacrylate.
Example 8
A UV-curable mirror back protective coating is different from that in example 4 in that the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-propanone.
Example 9
A UV-curable mirror-back protective coating, which is different from example 8 in that the polymerization inhibitor is p-benzoquinone.
Example 10
The difference between the UV-cured mirror back protective coating and the example 8 is that the pigment and filler is talcum powder.
Example 11
The UV-cured mirror back protective coating is different from the coating in example 8 in that the pigment and filler are kaolin.
Example 12
A UV-curable coating for protecting the back of a mirror, which is different from that of example 8 in that 0.8kg of phosphoric methacrylate was used.
Example 13
A UV-curable coating for protecting the back of a mirror, which is different from that of example 12 in that 1.0kg of phosphoric methacrylate was used.
Example 14
A UV-curable mirror-back protective coating, which differs from example 13 in that 0.8kg of titanate coupling agent.
Example 15
A UV-curable mirror-back protective coating, which differs from example 14 in that the titanate coupling agent was 1.0 kg.
Example 16
A UV-curable mirror-back protective coating was prepared in a manner different from that of example 15 in that the amount of the silane coupling agent was 0.8 kg.
Example 17
A UV-curable mirror-back protective coating was prepared in a manner different from that of example 16 in that the silane coupling agent was 1.0 kg.
Example 18
A UV-curable mirror back protective coating is different from that in example 17 in that nano SiO210 kg.
Example 19
A UV-curable mirror back protective coating is different from that in example 18 in that nano SiO2It was 12 kg.
Example 20
A UV-curable mirror back protective coating, which is different from example 19 in that nano Al2O3The mass of (2) is 10 kg.
Example 21
The difference between the UV-cured mirror back protective coating and the example 20 is that the nano Al2O3The mass of (2) is 12 kg.
Example 22
A UV-curable mirror back protective coating is different from example 20 in that nano Al2O3Has a mass of 18kg and is nano SiO2The mass of (2) is 6 kg.
Comparative example
Comparative example 1
A UV-curable mirror back protective coating is different from the UV-curable mirror back protective coating in example 4 in that nano SiO is not added2。
Comparative example 2
The difference between the UV-cured mirror back protective coating and the example 4 is that nano Al is not added2O3。
Comparative example 3
A UV-curable mirror-back protective coating, which differs from example 4 in that no methacrylic acid phosphate was added.
Comparative example 4
A UV-curable mirror-back protective coating, which differs from example 4 in that no titanate coupling agent is added.
Comparative example 5
A UV-curable mirror-back protective coating, which differs from example 4 in that no alkylsilicon coupling agent was added.
Comparative example 6
A UV-curable mirror-back protective coating, which is different from example 4 in that stearic acid is not added.
Performance test
Detection method
The coating is evenly sprayed on the surface of an aluminum mirror, after standing and curing for 7 days, the adhesive force is tested according to the standard GB/T5210-1985, and the hardness of the paint film is determined according to the national standard GB/T6739 'Pencil test method for hardness of the paint film'.
TABLE 1 examination results of examples 1 to 22 and comparative examples 1 to 6
| Film thickness μm | Hardness of | adhesion/Mpa | |
| Example 1 | 20 | 3H | 10.1 |
| Example 2 | 21 | 4H | 10.5 |
| Example 3 | 20 | 3H | 11 |
| Example 4 | 22 | 4H | 11.8 |
| Example 5 | 23 | 3H | 11.5 |
| Example 6 | 21 | 3H | 11.2 |
| Example 7 | 22 | 4H | 11.2 |
| Example 8 | 22 | 4H | 12 |
| Example 9 | 21 | 3H | 11.8 |
| Example 10 | 23 | 3H | 11.4 |
| Example 11 | 24 | 4H | 11.5 |
| Example 12 | 22 | 3H | 12.3 |
| Example 13 | 23 | 4H | 12.7 |
| Example 14 | 21 | 3H | 13.4 |
| Example 15 | 20 | 3H | 13.6 |
| Example 16 | 22 | 4H | 13.8 |
| Example 17 | 21 | 4H | 14 |
| Example 18 | 21 | 3H | 14.2 |
| Example 19 | 22 | 3H | 14.6 |
| Example 20 | 20 | 3H | 14.8 |
| Example 21 | 21 | 4H | 15 |
| Example 22 | 21 | 4H | 15.2 |
| Comparative example 1 | 21 | 4H | 7.3 |
| Comparative example 2 | 20 | 3H | 7.8 |
| Comparative example 3 | 22 | 3H | 8.3 |
| Comparative example 4 | 20 | 4H | 7.9 |
| Comparative example 5 | 20 | 3H | 7.6 |
| Comparative example 6 | 21 | 3H | 7.3 |
As can be seen from the data in Table 1, the mirror back protective coating prepared by the method is prepared by adding methacrylic acid phosphate, titanate coupling agent, silane coupling agent and nano SiO in the preparation process of the mirror back protective coating2Nano Al2O3And stearic acid, the strength of the mirror back protective coating attached to the aluminum mirror is improved.
According to the detection data of the embodiments 1 to 5, the raw material formula of the embodiment 4 is excellent, and the prepared mirror back protective coating has strong adhesive force on the aluminum mirror;
by combining the detection data of the example 8, the examples 12 to 13 and the comparative example 3, it can be seen that the adhesive force of the mirror back protective coating to the aluminum mirror can be effectively improved by adding the methacrylic acid phosphate into the mirror back protective coating in the document, and when the addition amount of the methacrylic acid phosphate is 1kg, the adhesive force of the mirror back coating to the aluminum mirror reaches 12.7 Mpa;
by combining the detection data of examples 13 to 15 and comparative example 4, it can be seen that the adhesive force of the mirror back protective coating to the aluminum mirror in the present application document can be effectively improved by adding the titanate coupling agent to the mirror back protective coating in the present application document, and when the addition amount of the titanate coupling agent is 1kg, the adhesive force of the mirror back coating to the aluminum mirror reaches 13.6 Mpa;
by combining the detection data of examples 15 to 17 and comparative example 5, it can be seen that when the silane coupling agent is added to the mirror back protective coating in the present application, the silane coupling agent, the nano silica and the nano alumina form a stable spatial structure, which can effectively improve the adhesion of the mirror back protective coating in the present application to the aluminum mirror;
as can be seen by combining the detection data of examples 16-19 and comparative example 2, the nano SiO2The nano silicon dioxide is added into the mirror back protective coating in the application document, the nano silicon dioxide is attached to the surface of the aluminum film, so that the roughness of the aluminum film is increased, and the adhesive force of the mirror back protective coating in the application document to the aluminum mirror can be effectively improved;
as can be seen by combining the test data of examples 19-21 and comparative example 1, nano Al is added2O3The adhesive force of the mirror back protective coating to the aluminum mirror can be effectively improved by adding the coating to the mirror back protective coating in the document;
as can be seen by combining the test data of examples 21 and 22, the nano SiO2And nano Al2O3When the mass ratio of (1: 3) is higher, the dispersion performance of the filler is better, so that the adhesive force of the mirror back protective coating in the application document to the aluminum mirror is improved.
By combining the detection data of example 1 and comparative example 6, it can be seen that the addition of stearic acid to the mirror back protective coating in the present document reduces the surface tension of the aluminum mirror, and facilitates the adsorption of nano-silica and alumina on the surface of the aluminum mirror, thereby improving the adhesion of the mirror back protective coating in the present document to the aluminum mirror.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The UV-cured mirror back protective coating is characterized by comprising the following raw materials in parts by weight: 10-40 parts of polyester acrylate, epoxy acrylate: 5-20 parts of aliphatic epoxy acrylate, 15-35 parts of aliphatic epoxy acrylate, 5-20 parts of reactive diluent, 1-3 parts of photoinitiator, 0.2-2 parts of polymerization inhibitor, 20-35 parts of pigment and filler, 0.5-1 part of methacrylic acid phosphate, 0.5-1 part of titanate coupling agent, 0.5-1 part of silane coupling agent, 78-12 parts of nano SiO27, 0.5-1 part of nano Al2O37 and 0.5-1 part of stearic acid.
2. The UV-curable mirror back protective coating according to claim 1, wherein: the active diluent is one or more of tripropylene glycol diacrylate, beta-hydroxyethyl methacrylate and dipropylene glycol diacrylate.
3. The UV-curable mirror back protective coating according to claim 1, wherein: the photoinitiator is one of 2-hydroxy-2-methyl-1-phenyl acetone and 2-hydroxy-2-methyl-1-phenyl-1 acetone.
4. The UV-curable mirror back protective coating according to claim 1, wherein: the polymerization inhibitor is one of benzenediol and p-benzoquinone.
5. The UV-curable mirror back protective coating according to claim 1, wherein: the pigment and filler is one or more of rutile type titanium dioxide, talcum powder and kaolin.
6. The UV-curable mirror back protective coating according to claim 1, wherein: the silane coupling agent is a methacryloxy silicone coupling agent.
7. The UV-curable mirror back protective coating according to claim 1, wherein: the mass ratio of the nano SiO2 to the nano Al2O3 is 1: 3.
8. A process for preparing a UV-curable mirror back protective coating according to any one of claims 1 to 7, characterized in that: the preparation method comprises the following preparation steps:
step 1: mixing polyester acrylate, epoxy acrylate and aliphatic epoxy acrylate, and uniformly stirring to obtain a mixture A;
step 2: and sequentially adding an active diluent, a photoinitiator, a polymerization inhibitor, a pigment filler, a defoaming agent, methacrylic acid phosphate, a titanate coupling agent, a silane coupling agent, nano SiO2, nano Al2O3 and stearic acid into the mixture A, mixing, and uniformly stirring to obtain the finished product of the UV-cured mirror back protective coating.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114736590B (en) | 2023-06-09 |
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