CN114736590B - UV (ultraviolet) curing mirror back protective coating and preparation process thereof - Google Patents
UV (ultraviolet) curing mirror back protective coating and preparation process thereof Download PDFInfo
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- CN114736590B CN114736590B CN202210299079.7A CN202210299079A CN114736590B CN 114736590 B CN114736590 B CN 114736590B CN 202210299079 A CN202210299079 A CN 202210299079A CN 114736590 B CN114736590 B CN 114736590B
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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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- 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
- C08K3/20—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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The application relates to the field of coatings, and particularly discloses a UV (ultraviolet) curing mirror back protective coating and a preparation process thereof. The UV curing mirror back protective coating comprises the following raw materials in parts by weight: 10-40 parts of polyester acrylate and epoxy acrylate: 5-20 parts of aliphatic polyurethane acrylic ester, 15-35 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 SiO 2 7-12 parts of nano Al 2 O 3 7-12 parts of stearic acid and 0.5-1 part of stearic acid, and has the advantages of improving the adhesive force between the paint and the aluminum mirror, and the like.
Description
Technical Field
The application relates to the field of coatings, in particular to a UV (ultraviolet) curing mirror back protective coating and a preparation process thereof
Background
The aluminum mirror is also called as an aluminum-plated glass mirror, and an aluminum film is sputtered on the back surface of the glass in vacuum to serve as a reflecting layer, so that the effect of illuminating a human image is achieved, and a layer of protective paint, also called as mirror back paint, is coated on the surface of the aluminum mirror, and can prevent the surface of the aluminum mirror, which is contacted with air, from being oxidized and blackened.
The mirror back paint is generally a photo-curing paint, the photo-curing paint is a paint which is cured rapidly under the action of illumination, and compared with other paint types, the photo-curing paint has a fast curing rate, and can be cured completely in a few seconds or tens of seconds under the irradiation of an ultraviolet lamp with a power of a plurality of kilowatts, so that the use requirement of the mirror back paint is met. The photocuring coating can save baking energy and improve the production efficiency of the aluminum mirror.
After the photo-curing coating is coated on the back surface of the aluminum mirror, the aluminum surface is smooth, the binding force between the photo-curing coating and the aluminum surface is difficult to meet the requirement, and the photo-curing coating is easy to fall off, so that the mirror can be damaged to a certain extent, and the overall aesthetic degree of the mirror can be influenced.
Disclosure of Invention
In order to improve the adhesive force between the photo-curing coating and the aluminum surface, the application provides a UV-curing mirror back protective coating and a preparation process thereof.
The application provides a UV curing mirror back protective coating and a preparation process thereof, which adopts the following technical scheme:
in a first aspect, the present application provides a UV-curable mirror back protective coating, which adopts the following technical scheme:
the UV curing mirror back protective coating comprises the following raw materials in parts by weight: 10-40 parts of polyester acrylate, 5-20 parts of epoxy acrylate, 15-35 parts of aliphatic polyurethane 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 SiO 2 7-12 parts of nano Al 2 O 3 7-12 parts and 0.5-1 part of stearic acid.
By adopting the technical scheme, the nano silicon dioxide and nano aluminum oxide have small particles and extremely high surface energy, have better adhesive force on the surface of the aluminum film, the nano silicon dioxide and nano aluminum oxide are adhered on the surface of the aluminum film, the roughness of the aluminum film is increased, the binding force between the photo-curing coating and the aluminum film is increased, the nano silicon dioxide promotes the thixotropy of the coating, the coating is easier to roll in the roll coating construction process, meanwhile, the splashing condition during the roll coating is prevented, the wear resistance and scratch resistance of a 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 is formed on the surface of the aluminum film of the aluminum mirror, and the nano aluminum oxide can be used for replacing the reaction of a base material aluminum film 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 oxidization;
the aluminum mirror is made by covering a thin aluminized film on glass, the aluminized film is very thin, the density is not so high, glass micropores with a certain area can leak out, the surface of the glass is provided with rich silicon hydroxyl structures, siloxane groups of the silane coupling agent can form Si-O-Si structures with silicon hydroxyl groups on the surface of the glass, and the adhesive force between the paint and the surface of the glass is increased.
The methacrylic acid phosphate can slightly react with the aluminum metal surface to form a complex, so that the adhesive force of the coating is enhanced, and meanwhile, the methacrylic acid phosphate has a slight phosphating effect on the substrate surface, so that the water penetration resistance is improved.
The long-chain molecular structural unit of the titanate coupling agent can be chemically crosslinked or physically entangled with polymer molecules, so that the inorganic filler and the polymer are well combined, the compactness of the surface of a paint film is improved, the surface energy of an aluminum film can be reduced by stearic acid, and the adhesive force of the paint and the aluminum film is improved.
Preferably, the reactive diluent is one or more of propylene glycol diacrylate, beta-hydroxyethyl methacrylate and dipropylene glycol diacrylate.
By adopting the technical scheme, the tri-shrinkage propylene glycol diacrylate, the methacrylic acid beta-hydroxyethyl or the dipropylene glycol diacrylate ensures that the paint has low shrinkage, good adhesive force and good water resistance.
Preferably, the photoinitiator is 2-hydroxy-2-methyl-1-phenylpropionic acid.
By adopting the technical scheme, the 2-hydroxy-2-methyl-1-phenylpropion is easy to blend with other coating raw materials.
Preferably, the polymerization inhibitor is one of benzene diphenol and p-benzoquinone.
By adopting the technical scheme, the p-benzoquinone can still be used under the anoxic condition, and the benzene diphenol and the p-benzoquinone do not need to be matched with other polymerization inhibitors, so that the anti-polymerization agent 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 and high covering power, and has excellent stability; talcum powder has high natural whiteness, does not need to bleach by chemical substances generally, 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 methacryloxy silicone coupling agent.
By adopting the technical scheme, the acryloyloxy group on the methacryloyloxy type silica coupling agent is favorable for the occurrence of the polymerization reaction of the coating.
Preferably, the nano SiO 2 And nano Al 2 O 3 The mass ratio of (2) is 1:3.
By adopting the technical scheme, the nano SiO 2 And nano Al 2 O 3 When the mass ratio of the nano particles is 1:3, the nano particles can be distributed more uniformly in the coating, and the nano particles can play a role without causing secondary agglomeration.
In a second aspect, the present application provides a process for preparing a UV-curable mirror back protective coating, which adopts the following technical scheme:
a preparation process of a UV curing mirror back protective coating comprises the following preparation steps:
step 1: mixing polyester acrylic ester, epoxy acrylic ester and aliphatic polyurethane acrylic ester, and uniformly stirring to obtain a mixture A;
step 2: reactive diluent, photoinitiator, polymerization inhibitor, pigment and filler, methacrylic acid phosphate, titanate coupling agent, silane coupling agent and nano SiO 2 Nano Al 2 O 3 And sequentially adding the ultraviolet-curing glass back protective coating and stearic acid into the mixture A, mixing, and stirring uniformly to obtain the finished ultraviolet-curing glass back protective coating.
In summary, the present application has the following beneficial effects:
1. the nano silicon dioxide and nano aluminum oxide have small particles and extremely high surface energy, have better adhesive force on the surface of the aluminum film, and the nano silicon dioxide and nano aluminum oxide are adhered on the surface of the aluminum film to increase the roughness of the aluminum film, increase the binding force between the photo-curing coating and the aluminum film, and improve the thixotropic property of the coating, so that the coating is easier to roll in the roll coating construction process, meanwhile, the splashing during the roll coating is prevented, and meanwhile, the wear resistance and scratch resistance of a paint film are improved to a certain extent. The nano aluminum oxide is used as a filler in a paint film, a layer of compact passivation film can be formed on the surface of the aluminum film of the aluminum mirror, and the nano aluminum oxide 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 post-processing process of the mirror, so that the aluminum mirror is protected from oxidization;
2. the aluminum mirror is made by covering a thin aluminized film on glass, the aluminized film is very thin, the density is not so high, glass micropores with a certain area can leak out, the surface of the glass is provided with rich silicon hydroxyl structures, siloxane groups of the silane coupling agent can form Si-O-Si structures with silicon hydroxyl groups on the surface of the glass, and the adhesive force between the paint and the surface of the glass is increased.
Detailed Description
The present application is described in further detail below with reference to examples.
Raw material source
Polyester acrylate is from Guangdong Haohui New Material Co., ltd., model CR890161;
epoxy acrylate is from Guangdong Haohui New Material Co., ltd., model HE421T;
the aliphatic urethane acrylate is from Sanchiensis chemical industry Co., ltd, model RU-6127B;
the propylene glycol diacrylate is from Henghu trade Co., guangzhou, model TPGDA;
beta-hydroxyethyl methacrylate is from Ji Ning Duoduo chemical Co., ltd., model 11;
dipropylene glycol diacrylate was from Jiangsu New Material Co., ltd., model 333;
2-hydroxy-2-methyl-1-phenylpropion is available from the company of wuhan biosciences, inc;
gamma- (methacryloyloxy) propyltrimethoxysilane was from mongolian photonics, inc;
the titanate coupling agent is from Guangzhou double chemical engineering Co., ltd, model 101;
the methacrylic acid phosphate is from Jining Malus asiatica chemical industry Co., ltd., model PM-2.
Examples
Examples 1 to 5
A preparation process of a UV curing mirror back protective coating comprises the following preparation steps:
step 1: mixing polyester acrylic ester, epoxy acrylic ester and aliphatic polyurethane acrylic ester, and uniformly stirring to obtain a mixture A;
step 2: reactive diluent, photoinitiator, polymerization inhibitor, pigment and filler, defoamer, methacrylic acid phosphate, titanate coupling agent, silane coupling agent and nano SiO 2 Nano Al 2 O 3 And sequentially adding the ultraviolet-curing glass back protective coating and stearic acid into the mixture A, mixing, and stirring uniformly to obtain the finished ultraviolet-curing glass back protective coating.
Wherein the reactive diluent is tripropylene glycol diacrylate, the photoinitiator is 2-hydroxy-2-methyl-1-phenyl acetone, the polymerization inhibitor is benzenediol, the pigment filler is rutile titanium dioxide, and the silane coupling agent is gamma- (methacryloyloxy) propyl trimethoxysilane.
TABLE 1 raw materials and amounts (kg) of the raw materials in examples 1 to 5
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Polyester acrylic ester | 10 | 15 | 25 | 35 | 40 |
| Epoxy acrylates | 5 | 8 | 12 | 16 | 20 |
| Aliphatic urethane acrylate | 15 | 20 | 25 | 30 | 35 |
| Reactive diluents | 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 acid 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, different from example 4, in that the reactive diluent is beta-hydroxyethyl methacrylate.
Example 7
A UV-curable mirror back protective coating, different from example 4, in that the reactive diluent is dipropylene glycol diacrylate.
Example 8
A UV-curable mirror back protective coating, differing from example 4 in that the photoinitiator was 2-hydroxy-2-methyl-1 phenyl-1 propanone.
Example 9
A UV-curable mirror back protective coating differing from example 8 in that the polymerization inhibitor is p-benzoquinone.
Example 10
A UV-curable mirror back protective coating, different from example 8 in that the pigment filler was talc.
Example 11
A UV-curable mirror back protective coating, different from example 8, in that the pigment filler was kaolin.
Example 12
A UV-curable mirror-back protective coating differing from example 8 in that the phosphoric methacrylate was 0.8kg.
Example 13
A UV-curable mirror-back protective coating was different from example 12 in that the phosphate methacrylate was 1.0kg.
Example 14
A UV-curable mirror-back protective coating differing from example 13 in that the titanate coupling agent was 0.8kg.
Example 15
A UV-curable mirror-back protective coating was different from example 14 in that the titanate coupling agent was 1.0kg.
Example 16
A UV-curable mirror-back protective coating was different from example 15 in that the silane coupling agent was 0.8kg.
Example 17
A UV-curable mirror-back protective coating was different from example 16 in that the silane coupling agent was 1.0kg.
Example 18
A UV-curable mirror back protective coating, different from example 17, is nano SiO 2 10kg.
Example 19
A UV-curable mirror back protective coating, different from example 18, is nano SiO 2 12kg.
Example 20
A UV-curable mirror back protective coating, different from example 19, is nano Al 2 O 3 The mass of (2) was 10kg.
Example 21
A UV-curable mirror back protective coating, different from example 20, is nano Al 2 O 3 The mass of (2) was 12kg.
Example 22
A UV-curable mirror back protective coating, different from example 20, is nano Al 2 O 3 The mass of (2) is 18kg, nano SiO 2 The mass of (2) was 6kg.
Comparative example
Comparative example 1
A UV-curable mirror back protective coating, different from example 4 in that no nano SiO was added 2 。
Comparative example 2
A UV-curable mirror back protective coating, different from example 4 in that no nano Al was added 2 O 3 。
Comparative example 3
A UV-curable mirror back protective coating was different from example 4 in that no phosphoric methacrylate was added.
Comparative example 4
A UV-curable mirror back protective coating, different from example 4 in that a titanate coupling agent was not added.
Comparative example 5
A UV-curable mirror back protective coating, different from example 4 in that no silicone coupling agent was added.
Comparative example 6
A UV-curable mirror back protective coating was different from example 4 in that stearic acid was not added.
Performance test
Detection method
The paint is evenly sprayed on the surface of an aluminum mirror, kept stand and maintained for 7 days, and then tested for adhesive force according to the standard GB/T5210-1985, and the paint film hardness is measured by referring to the national standard GB/T6739 pencil test for paint film hardness.
TABLE 1 detection results for examples 1-22 and comparative examples 1-5
| 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 in this application,by adding methacrylic acid phosphate, titanate coupling agent, silane coupling agent and nano SiO in the preparation process of the mirror back protective coating 2 Nano Al 2 O 3 And stearic acid, which improves the adhesion strength of the mirror back protective coating on the aluminum mirror.
According to the detection data of the examples 1-5, the raw material preparation of the example 4 is better, and the prepared mirror back protective coating has stronger adhesive force on an aluminum mirror;
as can be seen by combining the detection data of examples 8, 12-13 and comparative example 3, the addition of the phosphoric acid methacrylate to the mirror back protective coating in the present application document can effectively improve the adhesion of the mirror back protective coating in the present application document to the aluminum mirror, and when the addition amount of the phosphoric acid methacrylate is 1kg, the adhesion of the mirror back coating to the aluminum mirror reaches 12.7Mpa;
as can be seen from the detection data of examples 13-15 and comparative example 4, the addition of the titanate coupling agent to the mirror back protective coating in the present application document can effectively improve the adhesion of the mirror back protective coating in the present application document to the aluminum mirror, and when the addition amount of the titanate coupling agent is 1kg, the adhesion of the mirror back coating to the aluminum mirror reaches 13.6Mpa;
as can be seen from the detection data of examples 15-17 and comparative example 5, the silane coupling agent is added into the mirror back protective coating in the application document, and the silane coupling agent forms a stable space structure with the nano silicon dioxide and the nano aluminum oxide, so that the adhesion force of the mirror back protective coating in the application document to an aluminum mirror can be effectively improved;
as can be seen from the examination data of examples 16-19 and comparative example 2, nano SiO was used 2 In the mirror back protective coating added in the application document, the nano silicon dioxide is attached to the surface of the aluminum film to increase the roughness of the aluminum film, so that 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 from the examination data of examples 19 to 21 and comparative example 1, nano Al was used 2 O 3 The additive is added into the mirror back protective coating in the application document, so that the mirror back protection in the application document can be effectively improvedAdhesion of the protective coating to the aluminum mirror;
as can be seen from the examination data of examples 21 and 22, nano SiO 2 And nano Al 2 O 3 When the mass ratio of the aluminum mirror back protective coating is 1:3, the dispersion performance of the filler is better, so that the adhesive force of the mirror back protective coating to the aluminum mirror is improved.
As can be seen from the detection data of the combination of the example 1 and the comparative example 6, the addition of stearic acid to the mirror back protective coating in the present application reduced the surface tension of the aluminum mirror, which is favorable for the adsorption of nano silicon oxide and aluminum oxide on the surface of the aluminum mirror, thereby improving the adhesion of the mirror back protective coating in the present application to the aluminum mirror.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (6)
1. The UV curing mirror back protective coating is characterized by comprising the following raw materials in parts by weight: 10-40 parts of polyester acrylate, 5-20 parts of epoxy acrylate, 15-35 parts of aliphatic polyurethane 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 SiO 2 7-12 parts of nano Al 2 O 3 7-12 parts of stearic acid and 0.5-1 part of stearic acid;
the nano SiO 2 And nano Al 2 O 3 The mass ratio of (2) is 1:3;
the silane coupling agent is a methacryloxy silica coupling agent.
2. The UV-curable backside protective paint according to claim 1, wherein: the reactive diluent is one or more of tripropylene glycol diacrylate, beta-hydroxyethyl methacrylate and dipropylene glycol diacrylate.
3. The UV-curable backside protective paint according to claim 1, wherein: the photoinitiator is 2-hydroxy-2-methyl-1-phenylpropionic acid.
4. The UV-curable backside protective paint according to claim 1, wherein: the polymerization inhibitor is one of benzene diphenol and p-benzoquinone.
5. The UV-curable backside protective paint according to claim 1, wherein: the pigment and filler is one or more of rutile type titanium dioxide, talcum powder and kaolin.
6. A process for preparing the UV-curable backside protective coating according to any one of claims 1 to 5, characterized in that: the preparation method comprises the following preparation steps:
step 1: mixing polyester acrylic ester, epoxy acrylic ester and aliphatic polyurethane acrylic ester, and uniformly stirring to obtain a mixture A;
step 2: reactive diluent, photoinitiator, polymerization inhibitor, pigment and filler, defoamer, methacrylic acid phosphate, titanate coupling agent, silane coupling agent and nano SiO 2 Nano Al 2 O 3 And sequentially adding the ultraviolet-curing glass back protective coating and stearic acid into the mixture A, mixing, and stirring uniformly to obtain the finished ultraviolet-curing glass back protective coating.
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749666A (en) * | 2011-04-20 | 2012-10-24 | 国家纳米科学中心 | Preparation method for reflection-deducting coating |
| CN112574455A (en) * | 2019-09-27 | 2021-03-30 | 新恒东薄膜材料（常州）有限公司 | High-hardness high-wear-resistance transparent polyimide hardened film with good coating adhesion |
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