CN116200085B - High-reflection photo-curing coating and preparation method and application thereof - Google Patents

Abstract

The invention provides a high-reflection photo-curing coating and a preparation method and application thereof, wherein the high-reflection photo-curing coating comprises the following components in parts by weight: 20-60 parts of first acrylic resin, 1-5 parts of second acrylic resin, 0.05-1 part of photoinitiator, 0.01-1 part of auxiliary agent, 5-15 parts of aluminum paste and 30-70 parts of solvent. The high-reflection photo-curing coating is matched with each other through the components, so that the formed coating is excellent in performance, high in reflectivity and fine in appearance, and the prepared projection film picture is excellent in display; when the method is applied to the preparation of the projection film, the continuous production can be realized, the production speed is more than 25M/min, the back and forth spraying is not needed for many times, the spraying stroke is not larger than the size of the material, the waste of the material is avoided, and the cost is reduced.

Description

A high-reflective light-curing coating and its preparation method and application

Technical Field

The invention belongs to the technical field of laser projection display preparation, and in particular relates to a high-reflective light-curing coating and a preparation method and application thereof.

Background technique

Projection screen is one of the essential accessories for laser TV display. Whether it is traditional projection, smart projection or laser TV, it uses light to project the image onto the screen or wall, and then the screen or wall reflects it to our eyes, becoming the image we see. Among them, the ultra-short-throw laser projection in the projection screen must use a circular Fresnel structure, and then a micron-level reflective aluminum layer needs to be coated on the circular Fresnel structure.

Currently, photocurable coatings generally contain both acrylic reactive monomers and acrylic resins, or require the addition of ultraviolet light absorbers, and have relatively complex compositions. The coatings made from the above-mentioned photocurable coatings have low reflectivity, and after being coated on projection films, the finished product images are poor.

The prior art mainly coats an aluminum layer on a circular Fresnel structure by spraying or printing, wherein the method of spraying aluminum is: spraying aluminum paste evenly on the surface of the material, and after the aluminum paste is completely sprayed on the entire surface of the material, the material is dried. In order to improve adhesion, it is generally baked in an oven at 80° for more than 30 minutes. Because the spraying method uses one piece of spraying, the spraying time is long, resulting in low production efficiency, and the spraying method uses multiple back and forth spraying. In order to prevent uneven spraying, the spraying stroke will be greater than the material size, resulting in waste of aluminum paste. The method of printing aluminum is: screen printing is used to print aluminum paste on the material, and after the aluminum paste is fully printed, the material is dried. In order to improve adhesion, it is generally baked in an oven at 80° for more than 30 minutes. Because the printing method requires precise alignment and a long baking time, the production efficiency is low, and there is screen printing after printing, and the appearance is uneven.

In view of the above problems, it is crucial to develop a photocurable coating with excellent performance and a coating method that is efficient, low-cost, capable of continuous coating and has uniform coating appearance.

Summary of the invention

The object of the present invention is to provide a highly reflective light-curing coating and a preparation method and application thereof. The highly reflective light-curing coating has high reflectivity and low cost, and the prepared projection film has a delicate appearance and excellent picture, and can be produced continuously with high production efficiency.

In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

In a first aspect, the present invention provides a highly reflective photocurable coating, which comprises the following components in parts by weight: 20-60 parts of a first acrylic resin, 1-5 parts of a second acrylic resin, 0.05-1 parts of a photoinitiator, 0.01-1 parts of an auxiliary agent, 5-15 parts of aluminum silver paste, and 30-70 parts of a solvent.

The highly reflective light-curing coating of the present invention has the advantages of low viscosity, rapid curing, etc. The highly reflective light-curing coating is prepared by the mutual coordination of various components, so that the coating has excellent performance, high reflectivity and delicate appearance.

In the present invention, the highly reflective light-curing coating comprises the following components in parts by weight: the first acrylic resin has a weight of 20-60 parts, for example, 20 parts, 24 parts, 28 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts or 60 parts; the second acrylic resin has a weight of 1-5 parts, for example, 1 part, 2 parts, 3 parts, 4 parts or 5 parts; the photoinitiator has a weight of 0.05-1 part, for example, 0.05 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.9 part or 1 parts; the weight portion of the auxiliary agent is 0.01-1 part, for example, it can be 0.01 part, 0.05 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.9 part or 1 part, etc.; the weight portion of the aluminum silver paste is 5-15 parts, for example, it can be 5 parts, 6 parts, 7 parts, 9 parts, 10 parts, 11 parts, 12 parts, 14 parts or 15 parts, etc.; the weight portion of the solvent is 30-70 parts, for example, it can be 30 parts, 40 parts, 50 parts, 60 parts or 70 parts, etc., but is not limited to the listed values, and other values not listed within the numerical range are equally applicable.

As a preferred technical solution of the present invention, the highly reflective light-curing coating comprises the following components in parts by weight: 30-40 parts of a first acrylic resin, 2-3 parts of a second acrylic resin, 0.05-0.08 parts of a photoinitiator, 0.01-0.06 parts of an auxiliary agent, 7-10 parts of an aluminum silver paste and 40-55 parts of a solvent.

As a preferred technical solution of the present invention, the molecular weight of the first acrylic resin is ≥50000 g/mol, for example, it can be 55000 g/mol, 60000 g/mol, 65000 g/mol, 70000 g/mol or 80000 g/mol, but is not limited to the listed values. Other unlisted values within the numerical range are also applicable, preferably 70000-125000 g/mol.

Preferably, the Tg point of the first acrylic resin is ≥80°C, for example, it can be 85°C, 90°C, 95°C, 100°C, 105°C or 110°C, but is not limited to the listed values. Other unlisted values within the numerical range are also applicable, preferably 95-105°C.

Preferably, the first acrylic resin comprises a thermoplastic acrylic resin, preferably a pure acrylic resin.

The present invention selects thermoplastic acrylic resin because thermoplastic resin has a large molecular weight and has a better silver powder arrangement effect.

In the present invention, the pure acrylic resin can be selected from Dow Chemical's A21, A11 or A14.

Preferably, the viscosity of the second acrylate resin is 50000-280000 Cp, for example, 70000 Cp, 90000 Cp, 100000 Cp, 150000 Cp, 200000 Cp or 250000 Cp, but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

Preferably, the second acrylate resin includes urethane acrylate resin.

The reason why the present invention selects polyurethane acrylic resin is that it has a higher hardness after curing and can have a better scratch resistance effect.

In the present invention, the polyurethane acrylic resin can be selected from Songda SD1119, SD7919, Changxing DR-U076 or DR-U145.

Preferably, the polyurethane acrylic resin has a functional group number of 6-9, for example, 6, 7, 8 or 9.

As a preferred technical solution of the present invention, the photoinitiator includes any one or a combination of at least two of 1-hydroxycyclohexyl phenyl ketone (PI 184), 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone (PI 907), ethyl 2,4,6-trimethylbenzoylphenylphosphonate (PI TPO), benzophenone (PI BP), phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide (PI 819) or 2-hydroxy-2-methylpropiophenone (PI 1173), and typical but non-limiting combinations of the combinations include: a combination of 1-hydroxycyclohexyl phenyl ketone and 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, a combination of ethyl 2,4,6-trimethylbenzoylphenylphosphonate and benzophenone, or a combination of benzophenone and 2-hydroxy-2-methylpropiophenone, etc.

Preferably, the auxiliary agent includes an organosilicon auxiliary agent and/or a modified organosilicon auxiliary agent.

In the present invention, the auxiliary agent includes any one of BYK373, BYK315, BYK325, BYK331, BYK3500, BYK3510, BYK3530, BYK3535, BYK3570, BYK3575, ZG400, TEGO410 or TEGO450, or a combination of at least two of them, preferably any one of BYK373, BYK315, BYK325, TEGO410 or TEGO450, or a combination of at least two of them.

Preferably, the aluminum-silver paste comprises any one of silver-white aluminum-silver paste, electroplated aluminum-silver paste or imitation electroplated aluminum-silver paste, or a combination of at least two of them. Typical but non-limiting combinations of the combinations include: a combination of silver-white aluminum-silver paste and electroplated aluminum-silver paste, a combination of electroplated aluminum-silver paste and imitation electroplated aluminum-silver paste, or a combination of silver-white aluminum-silver paste, electroplated aluminum-silver paste and imitation electroplated aluminum-silver paste, etc., preferably electroplated aluminum-silver paste and/or imitation electroplated aluminum-silver paste.

Preferably, the solvent comprises any one of butyl acetate, acetone, methyl isobutyl ketone, isopropyl alcohol or toluene, or a combination of at least two thereof. Typical but non-limiting combinations of the combinations include: a combination of butyl acetate and acetone, a combination of methyl isobutyl ketone and isopropyl alcohol, a combination of isopropyl alcohol and toluene, and the like.

In a second aspect, the present invention provides a method for preparing the highly reflective photocurable coating described in the first aspect, the preparation method comprising: mixing a second acrylic resin and a photoinitiator, then adding the first acrylic resin, an auxiliary agent, aluminum silver paste and a solvent thereto, and filtering to obtain the highly reflective photocurable coating.

As a preferred technical solution of the present invention, the mixing method includes stirring.

Preferably, the stirring speed is 500-2000 rpm, for example, it can be 500 rpm, 600 rpm, 800 rpm, 1000 rpm, 1200 rpm, 1400 rpm, 1600 rpm, 1800 rpm or 2000 rpm, but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

Preferably, the stirring time is 30-120 min, for example, 30 min, 50 min, 70 min, 90 min, 100 min, 110 min or 120 min, etc., but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

In the present invention, the filtering comprises: filtering the mixed material through a 200-mesh filter cloth.

In a third aspect, the present invention provides an application of the highly reflective light-curable coating according to the first aspect, wherein the highly reflective light-curable coating is applied to the preparation of a projection film, comprising the following steps:

(1) coating and transferring the prepared highly reflective light-curing coating onto the surface of the projection film through a micro-concave coating roller to form a pre-coating layer;

(2) The pre-coating layer of step (1) is sequentially dried and photocured to obtain the projection film.

The invention applies a highly reflective light-curing coating by means of a micro-concave coating roller, transfers the coating to a projection film structure, and then the material enters a temperature-increasing oven to volatilize the solvent, and then the surface pre-coating layer is completely cured by irradiation with a whole-surface UV lamp, so that the obtained projection film has a uniform and delicate appearance. The preparation method can be produced continuously, with a production speed of more than 25 M/min, and does not require multiple spraying back and forth, and the spraying stroke will not be larger than the material size, thereby avoiding material waste and reducing costs.

In the present invention, the projection film is firstly conveyed to the micro-concave coating roller via an unwinding device, and then the projection film is collected via a winding device after light curing.

As a preferred technical solution of the present invention, the oblique angle of the micro-concave coating roller in step (1) is 60°-70°, for example, it can be 60°, 62°, 64°, 66°, 68° or 70°, but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

Preferably, the number of oblique lines of the micro-concave coating roller in step (1) is 20-30 inches, for example, it can be 20 inches, 22 inches, 24 inches, 26 inches, 28 inches or 30 inches, but is not limited to the listed values, and other values not listed within the numerical range are also applicable.

Preferably, the depth of the micro-concave coating roller in step (1) is 200-300 μm, for example, 200 μm, 220 μm, 240 μm, 260 μm, 280 μm or 300 μm, etc., but is not limited to the listed values, and other values not listed within the numerical range are also applicable.

As a preferred technical solution of the present invention, the transfer amount of the coating transfer in step (1) is 30-50g, for example, it can be 30g, 34g, 38g, 40g, 44g, 48g or 50g, but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

Preferably, the thickness of the pre-coating layer in step (1) is 40-60 μm, for example, 40 μm, 44 μm, 48 μm, 50 μm, 54 μm, 58 μm or 60 μm, etc., but is not limited to the listed values, and other values not listed within the numerical range are also applicable.

Preferably, the reflectivity of the pre-coating layer in step (1) is ≥90%, for example, it can be 90%, 91%, 92%, 93%, 94%, 95% or 98%, etc., but is not limited to the listed values, and other values not listed within the numerical range are also applicable.

As a preferred technical solution of the present invention, the drying temperature in step (2) is 75-80°C, for example, it can be 75°C, 76°C, 77°C, 78°C, 79°C or 80°C, but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

Preferably, the drying time in step (2) is 40-100 s, for example, 40 s, 50 s, 60 s, 70 s, 80 s, 90 s or 100 s, etc., but is not limited to the listed values, and other values not listed within the numerical range are also applicable.

Compared with the prior art which requires baking at a temperature above 80° C. for more than 30 minutes, the present invention greatly shortens the drying time.

Preferably, the photocuring in step (2) includes ultraviolet light curing.

Preferably, the wavelength of ultraviolet light in the ultraviolet light curing is 320-400nm, for example, it can be 320nm, 330nm, 340nm, 350nm, 360nm, 370nm, 380nm, 390nm or 400nm, but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

Preferably, the energy of the UV curing is 150-300 mj, for example, it can be 150 mj, 170 mj, 200 mj, 220 mj, 240 mj, 260 mj, 280 mj or 300 mj, but is not limited to the listed values, and other unlisted values within the numerical range are also applicable.

The numerical range described in the present invention not only includes the point values listed above, but also includes any point values between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values included in the range.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The highly reflective light-curing coating of the present invention has excellent coating performance, high reflectivity and delicate appearance through the cooperation of various components, and the obtained projection film has excellent image display;

(2) The method for preparing the projection film provided by the present invention can be produced continuously with a production speed of more than 25 M/min, and does not require multiple spraying back and forth, and the spraying stroke will not be larger than the material size, thereby avoiding material waste and reducing costs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow chart of a method for preparing a projection film provided in Application Example 1.

Detailed ways

The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only used to help understand the present invention and should not be regarded as specific limitations of the present invention.

Example 1

The present embodiment provides a highly reflective light-curable coating and a preparation method thereof, wherein the highly reflective light-curable coating comprises the following components in parts by weight: 40 parts of a first acrylic resin, 3 parts of a second acrylic resin, 0.07 parts of a photoinitiator (PI 184), 0.05 parts of an organosilicon additive (BYK 373), 9 parts of an electroplated aluminum silver paste (ZL-8000), and 50 parts of ethyl acetate;

The first acrylic resin is pure acrylic resin (Dow Chemical A11), with a molecular weight of 125,000 g/mol and a Tg point of 100° C.; the second acrylic resin is polyurethane acrylic resin (Songda SD1119), with a functional group number of 9 and a viscosity of 200,000 Cp;

The preparation method of the highly reflective light-curing coating comprises: stirring the second acrylic resin and the photoinitiator at a rotation speed of 1000 rpm for 60 minutes, then adding the first acrylic resin, the silicone auxiliary agent, the electroplated aluminum silver paste and the ethyl acetate thereto and continuing to stir at a rotation speed of 1000 rpm for 60 minutes, and filtering through a 200-mesh filter cloth after mixing evenly to obtain the highly reflective light-curing coating.

Example 2

The present embodiment provides a highly reflective light-curable coating and a preparation method thereof, wherein the highly reflective light-curable coating comprises the following components in parts by weight: 35 parts of a first acrylic resin, 2 parts of a second acrylic resin, 0.05 parts of a photoinitiator (PI TPO), 0.06 parts of an organosilicon additive (BYK 315), 8 parts of an electroplating aluminum silver paste (ZF-5003A), and 40 parts of acetone;

The first acrylic resin is pure acrylic resin (A14), with a molecular weight of 70,000 g/mol and a Tg point of 95° C.; the second acrylic resin is polyurethane acrylic resin (Changxing DR-U076), with a functional group number of 6 and a viscosity of 70,000 Cp;

The preparation method of the highly reflective light-curing coating comprises: stirring the second acrylic resin and the photoinitiator at a rotation speed of 800 rpm for 80 minutes, then adding the first acrylic resin, the silicone auxiliary agent, the electroplating aluminum silver paste and acetone thereto, and continuing to stir at a rotation speed of 800 rpm for 80 minutes, and filtering through a 200-mesh filter cloth after mixing evenly to obtain the highly reflective light-curing coating.

Example 3

The present embodiment provides a highly reflective light-curable coating and a preparation method thereof, wherein the highly reflective light-curable coating comprises the following components in parts by weight: 50 parts of a first acrylic resin, 5 parts of a second acrylic resin, 0.09 parts of a photoinitiator (PI 819), 1 part of an organosilicon additive (TEGO 410), 12 parts of an electroplated aluminum silver paste (ZF-6103), and 60 parts of toluene;

The first acrylic resin is pure acrylic resin (A21), with a molecular weight of 120,000 g/mol and a Tg of 105° C.; the second acrylic resin is polyurethane acrylic resin (Changxing DR-U145), with a functional group number of 6 and a viscosity of 60,000 Cp;

The preparation method of the highly reflective light-curing coating comprises: stirring the second acrylic resin and the photoinitiator at a rotation speed of 2000 rpm for 40 minutes, then adding the first acrylic resin, the silicone auxiliary agent, the electroplating aluminum silver paste and toluene thereto and continuing to stir at a rotation speed of 2000 rpm for 40 minutes, and filtering through a 200-mesh filter cloth after mixing evenly to obtain the highly reflective light-curing coating.

Example 4

This embodiment provides a highly reflective light-curing coating and a preparation method thereof. Except that "pure acrylic resin" is replaced by "epoxy acrylic resin", other conditions are the same as those in Example 1.

Example 5

This embodiment provides a highly reflective photocurable coating and a preparation method thereof. Except that "polyurethane acrylic resin" is replaced by "polycarbonate acrylic resin", other conditions are the same as those in Example 1.

Comparative Example 1

This comparative example provides a photocurable coating and a preparation method thereof. Except that the "pure acrylic resin" is replaced by "o-phenylphenoxyethyl acrylate", other conditions are the same as those in Example 1.

Comparative Example 2

This comparative example provides a photocurable coating and a preparation method thereof. Except that "35 parts of the first acrylic resin and 2 parts of the second acrylic resin" are replaced by "37 parts of the first acrylic resin", other conditions are the same as those in Example 1.

Comparative Example 3

This comparative example provides a photocurable coating and a preparation method thereof. Except that "35 parts of the first acrylic resin and 2 parts of the second acrylic resin" are replaced by "37 parts of the second acrylic resin", other conditions are the same as those in Example 1.

Comparative Example 4

This comparative example provides a photocurable coating and a preparation method thereof. Except that the photocurable coating includes the following components in parts by weight: 70 parts of a first acrylic resin, 3 parts of a second acrylic resin, 0.07 parts of a photoinitiator (PI 184), 0.05 parts of an organosilicon additive (BYK 373), 9 parts of an electroplated aluminum silver paste (ZL-8000) and 20 parts of ethyl acetate, other conditions are the same as those in Example 1.

Comparative Example 5

This comparative example provides a photocurable coating and a preparation method thereof. Except that the photocurable coating includes the following components in parts by weight: 15 parts of a first acrylic resin, 3 parts of a second acrylic resin, 0.07 parts of a photoinitiator (PI 184), 0.05 parts of an organosilicon additive (BYK 373), 9 parts of an electroplated aluminum silver paste (ZL-8000) and 75 parts of ethyl acetate, other conditions are the same as those in Example 1.

Comparative Example 6

This comparative example provides a photocurable coating and a preparation method thereof. Except that the photocurable coating includes the following components in parts by weight: 46 parts of a first acrylic resin, 3 parts of a second acrylic resin, 0.07 parts of a photoinitiator (PI 184), 0.05 parts of an organosilicon additive (BYK 373), 3 parts of an electroplated aluminum silver paste (ZL-8000) and 20 parts of ethyl acetate, other conditions are the same as those in Example 1.

Comparative Example 7

This comparative example provides a photocurable coating and a preparation method thereof. Except that the photocurable coating includes the following components in parts by weight: 51 parts of a first acrylic resin, 3 parts of a second acrylic resin, 0.07 parts of a photoinitiator (PI 184), 0.05 parts of an organosilicon additive (BYK 373), 20 parts of an electroplated aluminum silver paste (ZL-8000) and 20 parts of ethyl acetate, other conditions are the same as those in Example 1.

Application Examples 1-5

This application example provides a method for preparing a projection film, and the preparation method flow chart is shown in FIG1 . The preparation method comprises the following steps:

(1) The projection film is conveyed to a micro-concave coating roller via an unwinding device, and then 40 g of the highly reflective light-curing coating prepared in the above Examples 1-5 is transferred to the surface of the projection film via the micro-concave coating roller to form a pre-coating layer with a thickness of 50 μm;

The diagonal angle of the micro-dimpled coating roller in step (1) is 65°, the number of diagonal lines is 25 inches, and the depth is 250 μm;

(2) The pre-coating layer in step (1) is dried at 80° C. for 60 seconds, and then photocured under the condition of ultraviolet light with a wavelength of 380 nm and an energy of 250 mj, and then rolled up to obtain the projection film.

Application Example 6

This application example provides a method for preparing a projection film. The preparation method is the same as that of Application Example 1, except that 25 g of the highly reflective light-curing coating prepared in the above-mentioned Example 1 is transferred to the surface of the projection film by a micro-concave coating roller to obtain a pre-coating layer with a thickness of 30 μm.

Application Example 7

This application example provides a method for preparing a projection film. The preparation method is the same as that of Application Example 1, except that 70 g of the highly reflective light-curing coating prepared in the above-mentioned Example 1 is transferred to the surface of the projection film by coating with a micro-concave coating roller to obtain a pre-coating layer with a thickness of 80 μm.

Comparative Application Examples 1-7

This comparative application example provides a method for preparing a projection film. The preparation method is the same as that of Application Example 1 except that in step (1), "40 g of highly reflective photocurable coating prepared in Example 1-5" is replaced by "photocurable coating prepared in Comparative Example 1-7".

The prepared projection film was tested for production speed, finished product image and reflectivity. The test results are shown in Table 1.

Table 1

From Table 1, we can draw the following conclusions:

(1) The projection film made of the highly reflective light-curing coating provided in Examples 1-3 of the present invention has a reflectivity of >90%, an excellent finished product image, a coating speed of >30 M/min, and a shortened production cycle;

(2) By comparing Application Example 1 with Application Examples 4-5, it can be seen that the performance of Application Examples 4-5 is worse than that of Application Example 1, which indicates that the projection film made by using pure acrylic resin as the first acrylic resin and polyurethane acrylic resin as the second acrylic resin has better performance;

(3) From the comparison between Application Example 1 and Application Examples 6-7, it can be seen that when the thickness of the applied pre-coating layer is too thin, the light transmittance is too high, resulting in a decrease in the reflectivity of the prepared projection film; when the thickness of the applied pre-coating layer is too thick, the leveling property of the image is deteriorated, resulting in a deterioration in the image of the prepared projection film;

(4) From the comparison between Application Example 1 and Comparative Application Examples 1-5, it can be seen that when the first acrylic resin is replaced with o-phenylphenoxyethyl acrylate, the production speed of the obtained projection film is slowed down due to the slow leveling, and the arrangement of the aluminum layer is disordered, resulting in a decrease in optical performance; when the raw material of the photocurable coating does not contain the first acrylic resin or the second acrylic resin, the viscosity difference is too large, resulting in a poor image of the obtained projection film; when the content of the first acrylic resin is too high or too low, the coating image is abnormal, resulting in a low reflectivity of the obtained projection film;

(5) From the comparison between Application Example 1 and Comparative Application Examples 6-7, it can be seen that when the content of aluminum-silver paste is too low, the reflectivity of the obtained projection film is low due to insufficient aluminum reflection; when the content of aluminum-silver paste is too high, the aluminum layer cannot be arranged, resulting in poor image quality of the obtained projection film and a slow coating speed.

The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned detailed structural features, that is, it does not mean that the present invention must rely on the above-mentioned detailed structural features to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the components selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims (27)

1. A highly reflective light-curing coating, characterized in that the highly reflective light-curing coating comprises the following components in parts by weight: 20-60 parts of a first acrylic resin, 1-5 parts of a second acrylic ester resin, 0.05-1 parts of a photoinitiator, 0.01-1 parts of an auxiliary agent, 5-15 parts of aluminum silver paste, and 30-70 parts of a solvent; The molecular weight of the first acrylic resin is ≥50000 g/mol; the first acrylic resin is a thermoplastic acrylic resin; The viscosity of the second acrylic resin is 50000-280000 Cp; the second acrylic resin is polyurethane acrylic resin. 2. The highly reflective light-curing coating according to claim 1 is characterized in that the highly reflective light-curing coating comprises the following components in parts by weight: 30-40 parts of a first acrylic resin, 2-3 parts of a second acrylate resin, 0.05-0.08 parts of a photoinitiator, 0.01-0.06 parts of an auxiliary agent, 7-10 parts of an aluminum paste, and 40-55 parts of a solvent. 3. The highly reflective light-curing coating according to claim 1 or 2, characterized in that the molecular weight of the first acrylic resin is 70,000-125,000 g/mol. 4 . The highly reflective light-curing coating according to claim 1 , wherein the Tg point of the first acrylic resin is ≥ 80° C. 5 . The highly reflective light-curing coating according to claim 1 , wherein the Tg point of the first acrylic resin is 95-105° C. 6 . The highly reflective light-curing coating according to claim 1 , wherein the first acrylic resin is pure acrylic resin. 7. The highly reflective light-curing coating according to claim 1, characterized in that the number of functional groups of the polyurethane acrylic resin is 6-9. 8. The highly reflective photocurable coating according to claim 1, characterized in that the photoinitiator comprises any one of 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, benzophenone, phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide or 2-hydroxy-2-methylpropiophenone, or a combination of at least two thereof. 9 . The highly reflective light-curing coating according to claim 1 , wherein the auxiliary agent comprises an organic silicon auxiliary agent and/or a modified organic silicon auxiliary agent. 10. The highly reflective light-curing coating according to claim 1, characterized in that the aluminum-silver paste comprises any one of silver-white aluminum-silver paste, electroplated aluminum-silver paste or imitation electroplated aluminum-silver paste, or a combination of at least two thereof. 11. The highly reflective light-curing coating according to claim 1, characterized in that the solvent comprises any one of butyl acetate, acetone, methyl isobutyl ketone, isopropyl alcohol or toluene, or a combination of at least two thereof. 12. A method for preparing the highly reflective light-curing coating according to any one of claims 1 to 11, characterized in that the preparation method comprises: mixing a second acrylic resin and a photoinitiator, then adding the first acrylic resin, an auxiliary agent, aluminum silver paste and a solvent thereto, and filtering to obtain the highly reflective light-curing coating. 13. The preparation method according to claim 12, characterized in that the mixing method includes stirring. 14. The preparation method according to claim 13, characterized in that the stirring speed is 500-2000 rpm. 15. The preparation method according to claim 13, characterized in that the stirring time is 30-120 min. 16. An application of the highly reflective light-curable coating according to any one of claims 1 to 11, characterized in that the highly reflective light-curable coating is applied to the preparation of a projection film, comprising the following steps: (1) coating and transferring the prepared highly reflective light-curing coating onto the surface of the projection film through a micro-concave coating roller to form a pre-coating layer; (2) The pre-coating layer of step (1) is dried and photocured in sequence to obtain the projection film. 17. The use according to claim 16, characterized in that the oblique angle of the micro-concave coating roller in step (1) is 60°-70°. 18. The use according to claim 16, characterized in that the number of oblique lines of the micro-concave coating roller in step (1) is 20-30 inches. 19. The use according to claim 16, characterized in that the depth of the micro-concave coating roller in step (1) is 200-300 μm. 20. The use according to claim 16, characterized in that the transfer amount of the coating transfer in step (1) is 30-50g. 21. The use according to claim 16, characterized in that the thickness of the pre-coating layer in step (1) is 40-60 μm. 22. The use according to claim 16, characterized in that the reflectivity of the pre-coating layer in step (1) is ≥ 90%. 23. The use according to claim 16, characterized in that the drying temperature in step (2) is 75-80°C. 24. The use according to claim 16, characterized in that the drying time in step (2) is 40-100 seconds. 25. The use according to claim 16, characterized in that the light curing in step (2) comprises ultraviolet light curing. 26. The use according to claim 25, characterized in that the wavelength of ultraviolet light in the ultraviolet light curing is 320-400nm. 27. The use according to claim 25, characterized in that the energy of the ultraviolet light curing is 150-300 mj.