CN106893463B

CN106893463B - Anti-fouling, anti-dazzle and anti-blue-light radiation curing coating composition and preparation method thereof

Info

Publication number: CN106893463B
Application number: CN201710055241.XA
Authority: CN
Inventors: 朱卫彪; 虞若昀; 蒋天龙
Original assignee: Shanghai Weikai Optoelectronic New Materials Co Ltd; Shanghai Chengying New Material Co Ltd; Jiangsu Chengying New Material Co Ltd
Current assignee: Shanghai Weikai Optoelectronic New Materials Co Ltd; Shanghai Chengying New Material Co Ltd; Jiangsu Chengying New Material Co Ltd
Priority date: 2017-01-24
Filing date: 2017-01-24
Publication date: 2020-04-21
Anticipated expiration: 2037-01-24
Also published as: CN106893463A

Abstract

The invention provides an anti-fouling, anti-dazzle and anti-blue-light radiation curing coating composition and a preparation method thereof, wherein the coating composition comprises the following components in parts by weight: 70-85 parts of acrylate oligomer, 3-8 parts of acrylate monomer, 7-10 parts of photoinitiator, 1-3 parts of blue light prevention auxiliary agent, 0.1-2 parts of anti-fouling auxiliary agent, 1-3 parts of anti-glare particles and 0.5-2 parts of other auxiliary agents. The coating composition disclosed by the invention does not need to use a fogging roller in the coating and curing process, can be suitable for multiple coating modes such as roller coating, spraying, dip coating and the like to obtain multiple functions such as stain resistance, anti-glare, blue light prevention and the like at one time, is suitable for various plastic coiled materials or plates, is simple and convenient to operate and low in cost, and can be used for fully retaining and playing the synergistic effect of the three functions such as stain resistance, anti-glare and blue light prevention because the surface layer of the coating is not damaged by the fogging roller during curing, so that the related problems in the field can be effectively solved.

Description

Anti-fouling, anti-dazzle and anti-blue-light radiation curing coating composition and preparation method thereof

Technical Field

The invention relates to the field of UV (ultraviolet) photocureable coating, in particular to an anti-fouling, anti-dazzle and anti-blue-light radiation photocureable coating composition and a preparation method thereof.

Background

The eyes are injured when being irradiated and stimulated by too strong light, namely glare, and adverse reactions such as dizziness and the like are also caused. With the rapid development of electronic products, people are in more and more contact with the display, the self-luminescence of the display and the reflected light of the external light on the screen often cause eye fatigue, and the phenomenon is particularly obvious when the outdoor strong light irradiates. In addition, because light-emitting elements in the display emit blue light, and a lot of eye diseases are caused by long-term exposure to the blue light, it is becoming more and more important to perform anti-glare and anti-blue light treatment on the surface of a display screen or other transparent protective covers to reduce the damage of glare to eyes and bodies.

At present, the blue light absorbent is mainly added to achieve the effect of preventing blue light, but when the blue light absorbent achieves better blue light prevention, the coating can obviously yellow due to yellow of the blue light absorbent, and certain color deviation is caused. One approach to anti-glare treatments is to coat or adhere a protective film of a matte, high-hardness coating to the surface of the display, which is increasingly achieved by radiation curing (electron beam curing or ultraviolet light curing, also EB curing or UV light curing). The matte effect is usually formed by adding particles into the coating or rolling the matte roller, and the surface of the coating is uneven. When the anti-fouling coating is used in a touch screen display, due to the unevenness of the surface of the matte coating, a large amount of grease in fingerprints is adhered to the concave parts, so that the coating is difficult to clean, the appearance is influenced, and the light transmittance of the coating is also influenced, so that the anti-fouling performance of the coating is also necessary while the anti-fouling treatment is carried out.

Patents CN101299073 and CN101235244 mention that when anti-glare particles are added into a UV coating and cured, an anti-fouling and anti-glare coating can be obtained, which does not have blue light prevention performance; patent No. CN1084774C mentions an antistatic and anti-glare coating, but the coating does not have anti-fouling performance, and after the coating is adhered on the coating, the coating is difficult to wipe clean, and the dirt area tends to be larger as the coating is wiped, and in addition, the coating is thermally cured and is not UV cured, so that the efficiency is low, and the energy consumption is large; CN101251608, CN101354454, and CN102762644 adopt organic particles to achieve the purpose of anti-glare, but in the presence of a monomer or a solvent, the organic particles swell, and the anti-glare effect of the coating is reduced after swelling, that is, the storage time of the coating is reduced, in addition, after the organic particles are settled, a hard block is formed at the bottom of the container due to the swelling effect, and is difficult to be fully stirred again, in addition, effective combination of the performances of anti-glare, anti-fouling, and blue light prevention is not achieved, and the common synergistic effect cannot be expressed; CN101679798, CN102959020 and CN102676004 have anti-glare function, but do not have anti-fouling or anti-blue light; CN103351677 adds fluorine, silicon assistant, antistatic assistant and antifouling resin into UV photocureable coating, after the matte effect is printed by matte rolling, the coating has three performances of antistatic, antifouling and anti-dazzle, but the anti-dazzle performance is obtained by adopting rolling, and the antifouling and antistatic effects are obviously reduced, because the anti-fouling assistant migrates to the surface after coating, the effect can be fully expressed, but the integral structure of the anti-fouling assistant distributed on the surface of the coating is destroyed when the anti-dazzle assistant is printed by the matte roller, in addition, the method has higher requirements on the precision and the uniformity of the matte roller, the haze and the anti-dazzle effect can be changed along with the abrasion of the produced matte roller, and the product stability is influenced, and finally, the method can not further realize the anti-dazzle effect by the coating modes without the matte roller, such as spraying, dip-coating, and the like, for example, acrylic, thicker or hard plates, it is difficult to use matte rolls to print matte structures.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a stain-resistant, anti-dazzle and blue-light-resistant radiation curing coating composition and a preparation method thereof. The coating composition disclosed by the invention does not need to use a fogging roller in the coating and curing process, can be suitable for multiple coating modes such as roller coating, spraying, dip coating and the like to obtain multiple functions such as stain resistance, anti-glare, blue light prevention and the like at one time, is suitable for various plastic coiled materials or plates, is simple and convenient to operate and low in cost, and can be used for fully retaining and playing the synergistic effect of the three functions such as stain resistance, anti-glare and blue light prevention because the surface layer of the coating is not damaged by the fogging roller during curing, so that the related problems in the field can be effectively solved.

The purpose of the invention is realized by the following technical scheme:

the invention relates to an anti-fouling, anti-dazzle and blue light radiation-proof curing coating composition, which comprises the following components in parts by weight:

preferably, the acrylate oligomer is one or a mixture of more of polyester acrylate, aliphatic polyurethane acrylate, aromatic polyurethane acrylate and epoxy acrylate; the acrylate oligomer has a functionality of 6 to 15, and a viscosity of greater than 50000cps, more preferably greater than 75000cps at 25 ℃. The acrylate oligomer mainly has a crosslinking effect, and can be used for adjusting the viscosity and the curing speed of the coating and adjusting the hardness, flexibility, scratch resistance and other comprehensive properties of the coating after the coating is cured. The resin with the viscosity of more than 5000cps (25 ℃) is adopted, and the high viscosity and high shearing force are mainly utilized, so that the uniform dispersion of the anti-dazzle particles is more facilitated.

Preferably, the acrylate monomer is an acrylic monomer having a functionality greater than 3, including at least one of DPHA, PET4A, DP2CAHA, DP6 CAHA. The acrylic monomer with the molecular weight of more than 3 is mainly used for reducing the viscosity, satisfying the related coating process and improving the adhesive force, improving the curing speed and reducing the influence on the final performance of the coating due to insufficient curing caused by the shielding of anti-glare particles.

Preferably, the photoinitiator is 184 and TPO composite photoinitiator system; (ii) a Wherein the weight ratio of 184 to TPO is 1-2: 1, and the weight ratio is more preferably 3: 2. TPO is added to increase the deep curing degree, so that the problem that the final performance of the coating is influenced due to insufficient curing caused by shielding of anti-glare particles is avoided. If the weight ratio is too large or too small, the final properties of the coating layer may be deteriorated, failing to achieve the effects of the present invention.

Preferably, the blue light prevention auxiliary agent is at least one of a commercially available ketone blue light absorber and an inorganic blue light absorber.

Preferably, the anti-fouling aid is a fluorine-containing or silicon-containing aid. In the coating process, the fluorine-containing anti-fouling auxiliary agent is easier to migrate to the surface than resin, so that the coating has better anti-fouling capability.

Preferably, the anti-glare particles are white carbon black anti-glare particles, and more preferably fluorine-modified white carbon black anti-glare particles. The addition of the white carbon black anti-dazzle particles can effectively reduce yellow color difference caused by the blue-light-proof absorbent. On one hand, the whiteness of the anti-dazzle particles and the shielding of a coating layer below the particles reduce the yellow color difference, and on the other hand, due to the cavity structure of the anti-dazzle particles, the anti-blue light absorber can be stored in a cavity in the stirring process of the coating, so that the leakage of the anti-blue light absorber is reduced, and the yellow color difference is reduced. According to the invention, compared with PMMA organic extinction powder for many times at the early stage, the use of PMMA extinction powder is found to be more serious than the yellow color difference of white carbon black anti-glare particles. The black extinction powder is selected, the yellow color difference is obviously improved, but the light transmittance of the coating is obviously reduced, and when the coating is used in a display protection paste, the screen becomes dark. The anti-fouling performance of the coating can be further improved by using the fluorine modified anti-glare particles.

Preferably, the auxiliary agent is one or more of a polymerization inhibitor, a leveling agent and a dispersing agent. The auxiliary agent can facilitate the operations of transportation, storage, coating construction and the like of the coating.

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

1. three functions of stain resistance, anti-dazzle and blue light prevention can be obtained by coating and curing once, and the three functions have obvious synergistic action and low yellow chromatic value.

2. The coating has low requirements on equipment, strong operability and wider coating mode.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating, which comprises the components in parts by weight shown in table 1; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 1

The implementation effect is as follows:

mixing the prepared coating with butyl ester according to the mass ratio of 1: 1.5 mixing, spraying on an acrylic plate, baking at 45 ℃ for 3-5 minutes, and then carrying out UV photocuring to obtain a plate, wherein the curing energy is 900mJ/cm²The test results for the radiation-cured coatings of this formulation are shown below:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 108 degrees and 72 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the antifouling property and the blue light resistance are durable, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 103 and 70 ℃; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 85.3 percent;

3. the full light transmittance and the haze of the coating are tested according to the standard of JIS K7105-1981, namely, the test method of the optical performance of the plastic, and the coating has the light transmittance of 91.8 percent and the haze of 10.7 percent;

4. blue light resistance test the transmittance at a wavelength of 400nm was measured in accordance with JIS K7105-1981, "test method for optical Properties of plastics". The blue light absorption rate of the coating curing coating of the invention at the wave band of 380-420nm is 96.6 percent;

5. yellow color difference test according to the standard of JIS Z8722-2009 color measurement method, the yellow color difference delta b of the coating after the anti-fouling, anti-dazzle and anti-blue light radiation curing coating provided by the invention is cured is 2.0.

The contact angles (water and oil) of the conventional anti-glare coating non-anti-fouling coating are respectively lower than 90 degrees and 45 degrees; after the oily pen is marked on the coating, the oily pen cannot be wiped off by dust-free cloth. The coating varnish without the anti-glare particles has the haze of less than 1 percent after being cured, and does not have the anti-glare function. When the absorptivity of the conventional blue light-proof UV coating in a 400nm wave band reaches 96% in a blue light-proof effect, delta b is more than 3.

Example 2

The embodiment relates to an anti-fouling, anti-glare and blue light radiation-resistant curing coating, which comprises the components in parts by weight shown in table 2; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 2

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 107.5 degrees and 72 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the antifouling property and the blue light resistance are durable, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 103.5 and 70 ℃; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 85.9 percent;

3. the matte surface is uniform, the light transmittance is 90.2 percent, and the haze is 15.5 percent;

4. blue light prevention performance, the blue light absorptivity of 380-420nm waveband is 97.3 percent

5. Yellow color difference colorimeter test Δ b ═ 2.4.

Example 3

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating which comprises the components in parts by weight shown in Table 3; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 3

The implementation effect is as follows:

mixing the prepared coating with butyl ester according to the mass ratio of 1: 1.5, performing roller coating on PET by using a No. 6 coating rod, baking for 3-5 minutes at the temperature of 45 ℃, and then performing UV (ultraviolet) photocuring to obtain a plate, wherein the curing energy is 900mJ/cm²The test results for the radiation-cured coatings of this formulation are shown below:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 109 and 73 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the antifouling property and the blue light resistance are durable, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 105 and 71 degrees; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 85.2 percent;

3. the matte surface is uniform, the light transmittance is 91.8 percent, and the haze is 10.4 percent;

4. blue light prevention performance, the blue light absorption rate of 380-400nm waveband is 97.1 percent

5. Yellow color difference colorimeter test Δ b is 2.3.

Example 4

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating which comprises the components in parts by weight shown in Table 4; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 4

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 107 degrees and 71 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the antifouling property and the blue light resistance are durable, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 104 and 70 ℃; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 85.5 percent;

3. the matte surface is uniform, the light transmittance is 92.2 percent, and the haze is 9.5 percent;

4. blue light prevention performance, the blue light absorption rate of 380-400nm waveband is 97.6 percent

5. Yellow color difference colorimeter test Δ b is 2.5.

Example 5

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating, which comprises the components in parts by weight shown in table 5; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 5

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 107 degrees and 72 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the antifouling property and the blue light resistance are durable, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 103.5 and 70.5 degrees; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 85.4 percent;

3. the matte surface is uniform, the light transmittance is 91.3 percent, and the haze is 13.6 percent;

5. Yellow color difference colorimeter test Δ b is 2.3.

Comparative example 1

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating which comprises the components in parts by weight shown in Table 6; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 6

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 106 degrees and 74 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the anti-pollution performance and the anti-blue light durability are realized, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 101 and 69 ℃; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 53.8 percent;

3. the matte surface is uniform, the light transmittance is 92.5 percent, and the haze is 0.7 percent;

4. blue light prevention performance, and the blue light absorptivity of 380-420nm waveband is 84.9 percent

5. Yellow color difference colorimeter test Δ b is 4.1.

Comparing the performance of the coating composition of example 1 with that of the comparative example, it can be seen that when no white carbon black is added to the comparative example, the anti-glare effect of the coating disappears, the yellow color difference of the coating is severe, and the durability of the blue light prevention is poor, because the white carbon black extinction powder is lacking in the covering of the whiteness of the white carbon black extinction powder to the yellow color, and on the other hand, the storage function of the extinction powder blue light absorber is lacking, and the blue light prevention auxiliary agent is completely exposed in the coating, so that the coating is relatively yellow, and the blue light prevention auxiliary agent is also rapidly aged and decomposed. In addition, the extinction powder is used, so that light rays are subjected to a certain diffuse reflection effect, and the transmission rate of blue light vertically passing through the coating is reduced.

Comparative example 2

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating which comprises the components in parts by weight shown in Table 7; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 7

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 108.3 degrees and 72 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the anti-pollution performance and the anti-blue light durability are realized, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 103.2 and 70 ℃; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 10.8 percent;

3. the matte surface is uniform, the light transmittance is 92.2 percent, and the haze is 10.9 percent;

4. blue light prevention performance, the blue light absorption rate of 380-420nm wave band is 11.0 percent

5. Yellow colour difference colorimeter test delta b is 0.1

Comparing the performance of the coating composition of example 1 with that of the comparative example, it can be seen that when the blue light prevention aid is not added to the comparative example, the coating still has stain resistance and anti-glare performance, but has less blue light absorption and cannot achieve the blue light emission effect.

Comparative example 3

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating, which comprises the components in parts by weight shown in Table 8; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 8

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 86 degrees and 43 degrees; drawing a transverse line on the coating by the oil pen, wiping the transverse line by dust-free cloth, and repeatedly testing, wherein the trace of the oil pen cannot be wiped clean after wiping for 2 times;

2. the anti-fouling and anti-blue light durability is realized, when the plate is placed for 180 days at room temperature and 50% humidity, more dust is adsorbed on the surface of the coating, and the water contact angle, the oily pen and the anti-blue light related tests cannot be accurately tested;

3. the matte surface is uniform, the light transmittance is 85.8 percent, and the haze is 21.5 percent;

4. blue light prevention performance, the blue light absorptivity of 380-420nm waveband is 96.6 percent

5. Yellow colour difference colorimeter testing delta b is 2.0

Comparing the performance of the coating composition of example 1 with that of the comparative example, it can be seen that the comparative example does not add an anti-fouling aid, and the coating is easy to adsorb dirt in the using process, resulting in a decrease in light transmittance, and the water contact angle, the oil pen and the blue light resistance related tests cannot be accurately tested.

Comparative example 4

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating which comprises the components in parts by weight shown in table 9; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 9

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 106.8 degrees and 71 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 35 times, and the oil pen still has oil resistance;

2. the antifouling property and the blue light resistance are durable, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 104.2 and 70 ℃; the oil pen is scratched to be transverse on the coating, the coating is wiped off by dust-free cloth, and the test is repeatedly carried out, wherein the wiping frequency can reach more than 30 times, and the oil pen still has oil resistance; the blue light absorption rate of 380-420nm waveband is 85.7 percent;

3. the matte surface is uniform, the light transmittance is 92.6 percent, and the haze is 9.3 percent;

4. blue light prevention performance, the blue light absorption rate of 380-400nm waveband is 97.5 percent

5. Yellow color difference colorimeter test Δ b is 3.6.

Comparing the performance of the coating composition of example 4 with that of the comparative example, it can be seen that the performance of the comparative example using the extinction powder of PMMA is equivalent to that of the comparative example using the inorganic extinction powder in terms of anti-fouling, anti-glare and anti-blue light, but Δ b is increased to 3.6, the yellow color difference is significantly increased, and the visual effect is seriously affected. This is probably caused by the fact that the original white color is weakened and the yellow covering power is reduced after the PMMA extinction powder is easily soaked and swelled by a solvent or a monomer.

Comparative example 5

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating, which comprises the components in parts by weight shown in table 10; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

Watch 10

The implementation effect is as follows:

1. the coating has good stain resistance, and contact angles (water and oil-measured by diiodomethane) respectively reach 105 degrees and 70 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the oil pen does not have the oil resistance when the wiping frequency reaches 23 times;

2. the antifouling property and the blue light resistance are durable, the plate is placed for 180 days at room temperature under the condition of 50% humidity, and contact angles (water and oil-measured by diiodomethane) respectively reach 102 and 68.5 degrees; the oil pen is scratched to form a transverse line on the coating, the transverse line is wiped off by using dust-free cloth, and the test is repeatedly carried out, wherein the oil pen does not have the oil resistance when the wiping frequency reaches 20 times; the blue light absorption rate of 380-420nm waveband is 85.7 percent;

3. the matte surface is uniform, the light transmittance is 92.8 percent, and the haze is 9.1 percent;

5. Yellow color difference colorimeter test Δ b is 2.6.

Comparing the performance of the coating composition of example 4 with that of the present comparative example, it can be seen that when the low-functionality acrylate monomer is used in the present comparative example, the fingerprint resistance of the coating is reduced, mainly because the curing speed of the coating is reduced due to the low-functionality acrylate monomer, and the anti-glare particles are added to further reduce the curing speed, so that the density of the surface of the coating is reduced, the scratch resistance of the coating is affected, and the anti-fouling performance of the coating is further affected.

Comparative example 6

The embodiment relates to an anti-fouling, anti-glare and blue-light-resistant radiation curing coating which comprises the components in parts by weight shown in Table 11; the components are taken according to the parts by weight, the acrylate oligomer and the anti-glare particles are stirred at a high speed of 1000 revolutions per minute for half an hour, and then the rest components are uniformly mixed to obtain the coating composition.

TABLE 11

The implementation effect is as follows:

3. the fog surface is not uniform, and the granular feeling formed by the agglomeration of the anti-dazzle particles is transparent;

5. Yellow color difference colorimeter test Δ b is 2.5.

Comparing the performance of the coating composition of example 4 with that of the comparative example, it can be seen that when the acrylate oligomer with a viscosity of less than 50000cps (25 ℃) is used in the comparative example, the non-uniform haze of the coating occurs when the coating is sprayed under the same process, which is mainly because the acrylate oligomer and the anti-glare particles are dispersed by high-speed stirring, the low viscosity results in low shearing force, the agglomerated anti-glare particles are not sufficiently and uniformly dispersed, and the apparent haze of the coating is not good.

The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.

Claims

1. The anti-fouling, anti-glare and anti-blue-light radiation curing coating composition is characterized by comprising the following components in parts by weight:

the acrylate monomer is an acrylic acid monomer with the functionality of more than 3; comprises at least one of dipentaerythritol hexaacrylate, pentaerythritol tetraacrylate and 2 mol caprolactone modified dipentaerythritol hexaacrylate;

the blue light prevention auxiliary agent is at least one of a ketone blue light absorbent and an inorganic blue light absorbent;

the acrylate oligomer is one or a mixture of polyester acrylate, aliphatic polyurethane acrylate, aromatic polyurethane acrylate and epoxy acrylate;

the acrylate oligomer has a functionality of 6-15 and a viscosity of greater than 50000cps at 25 ℃.

2. The anti-smudge, anti-glare, anti-blue radiation curable coating composition of claim 1, wherein the photoinitiator is a composite photoinitiator system of 184 and TPO; wherein the weight ratio of 184 to TPO is 1-2: 1.

3. The anti-fouling, anti-glare and anti-blue-light radiation curable coating composition according to claim 1, wherein the anti-fouling auxiliary agent is a fluorine-containing or silicon-containing auxiliary agent.

4. The anti-fouling, anti-glare and blue-light-radiation-curable coating composition according to claim 1, wherein the anti-glare particles are white carbon black anti-glare particles.

5. The anti-fouling, anti-glare and anti-blue-light radiation curing coating composition as claimed in claim 1, wherein the other additives are one or more of a polymerization inhibitor, a leveling agent and a dispersing agent.

6. A method of preparing an anti-smudge, anti-glare, anti-blue light radiation curable coating composition according to any one of claims 1 to 5, comprising the steps of: and (3) stirring and mixing the acrylate oligomer and the blue light prevention auxiliary agent at a high speed, adding other components, and mixing uniformly.