Imaging coating based on transparent display screen and preparation method thereof

Abstract

The invention relates to the technical field of imaging coatings, and discloses an imaging coating based on a transparent display screen and a preparation method thereof.The imaging coating of the transparent display screen is obtained by adding modified bentonite, acrylic resin and a radiation absorbent into a stirrer and stirring uniformly; the preparation method comprises the following steps: reacting bentonite with KH560 to obtain epoxy modified bentonite; the preparation method comprises the following steps: reacting cardanol with 2, 2-bis (bromomethyl)-1, 3-propylene glycol to obtain an intermediate A, enabling the cardanol to form disubstitution on the 2, 2-bis (bromomethyl)-1, 3-propylene glycol, and continuously reacting the intermediate A with phosphorus tribromide to obtain bromine modified cardanol; the epoxy modified bentonite, the bromine modified cardanol, polyhedral oligomeric silsesquioxane and ethylenediamine are subjected to a reaction, and modified bentonite is obtained; long chains in the modified bentonite cardanol can be wound with bentonite and polyhedral oligomeric silsesquioxane to form network interpenetration, so that the mechanical properties of the bentonite and the polyhedral oligomeric silsesquioxane are improved, and the mechanical strength of the imaging coating is improved.

Description

Technical Field

[0001] This invention relates to the field of imaging coating technology, specifically to an imaging coating based on a transparent display screen and its preparation method. Background Technology

[0002] Transparent displays integrate microelectronics, optoelectronics, computer technology, and information processing technology. The surface of a liquid crystal display (LCD) screen has a soft layer called a polarizer, which filters light. In other words, when the LCD screen is working, it filters out light in the X or Y directions, leaving only parallel light. Without the polarization of the light by the polarizer, no display would be visible to the naked eye. In the production process, circuitry is first printed onto two ultra-thin transparent substrates made of ITO material. Then, the two substrates are aligned and pressed together. Next, liquid crystal is poured between the two transparent substrates and the opening is sealed. Finally, polarizers are attached to the outside of the transparent substrates. The key to solving this problem is ensuring that the imaging coating adheres well to the transparent display screen. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an imaging coating based on a transparent display screen and its preparation method, which has better imaging effects and mechanical properties.

[0004] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: an imaging coating based on a transparent display screen, wherein the imaging coating based on the transparent display screen comprises the following weight components: 2-5 parts by weight of modified bentonite, 10-15 parts by weight of acrylic resin, and 8-16 parts by weight of radiation absorber.

[0005] Preferably, the modified bentonite is prepared by: (1) Add bentonite to hydrochloric acid solution for acidification to obtain acid-modified bentonite, disperse it in ethanol, add KH560 and stir to react, filter, wash and dry to obtain epoxy-modified bentonite; (2) Add cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol to acetone solvent and stir until homogeneous. Then add sodium hydroxide solution with a molar concentration of 4-6 mol / L dropwise. React at 30-70℃ for 3-8 h. After the reaction is completed, add dilute hydrochloric acid dropwise to neutralize. Concentrate, filter, wash and dry to obtain intermediate A. (3) Add acetone solvent to the reactor, purge with nitrogen for protection, add intermediate A and phosphorus tribromide, react for 2-6 hours at 30-50 min, add ice water after reaction, concentrate, extract with ethyl acetate, dry the organic phase with anhydrous magnesium sulfate, concentrate the filtrate, wash with diethyl ether, and recrystallize with ethyl acetate to obtain bromine-modified cashew phenol. (4) Add epoxy-modified bentonite and bromine-modified cashew phenol to N,N-dimethylformamide solvent, stir evenly, and then continue to add cage-type silsesquioxane and ethylenediamine. React at 50-80℃ for 6-12h. After the reaction, distill under reduced pressure, filter and dry to obtain modified bentonite.

[0006] Preferably, the mass fraction of hydrochloric acid in (1) is 1-2%.

[0007] Preferably, the mass ratio of bentonite to KH560 in (1) is 1:1.2-1.5.

[0008] Preferably, the mass ratio of cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol in (2) is 1.1-1.3:1.

[0009] Preferably, the mass ratio of intermediate A to phosphorus tribromide in (3) is 1:1.5-2.1.

[0010] Preferably, the mass ratio of epoxy-modified bentonite, bromine-modified cashew phenol, cage-type silsesquioxane, and ethylenediamine in (4) is 1:1.2-1.3:0.8-1.1:0.9-1.3.

[0011] Preferably, the radiation absorber is nano-silica.

[0012] Preferably, the method for preparing the imaging coating based on the transparent display screen includes the following steps: adding modified bentonite, acrylic resin and radiation absorber to a stirrer, stirring evenly, and stirring at 40-80℃ for 2-4 hours to obtain the imaging coating of the transparent display screen.

[0013] (iii) Beneficial technical effects This invention involves adding modified bentonite, acrylic resin, and radiation absorber to a stirrer, stirring until homogeneous, and then obtaining an imaging coating for a transparent display screen.

[0014] Bentonite and KH560 were reacted to obtain epoxy-modified bentonite; cashew phenol was reacted with 2,2-di(bromomethyl)-1,3-propanediol to obtain intermediate A, which caused cashew phenol to form a disubstituted product on 2,2-di(bromomethyl)-1,3-propanediol. Intermediate A was further reacted with phosphorus tribromide to obtain bromine-modified cashew phenol; epoxy-modified bentonite, bromine-modified cashew phenol, cage-like silsesquioxane, and ethylenediamine were reacted to obtain modified bentonite; the long chains in the modified bentonite cashew phenol would entangle with bentonite and cage-like silsesquioxane to form an interpenetrating network, which would increase the mechanical properties of each other and increase the mechanical strength of the imaging coating. Detailed Implementation Example

[0015] (1) Add bentonite to a 1% hydrochloric acid solution for acidification to obtain acid-modified bentonite, disperse it in ethanol, add KH560 and stir to react, wherein the mass ratio of bentonite to KH560 is 1:1.2, filter, wash and dry to obtain epoxy-modified bentonite; (2) Add cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol to acetone solvent and stir until homogeneous. The mass ratio of cashew phenol to 2,2-di(bromomethyl)-1,3-propanediol is 1.1:1. Then add sodium hydroxide solution with a molar concentration of 4 mol / L dropwise. React at 30°C for 3 h. After the reaction is completed, add dilute hydrochloric acid dropwise to neutralize. Concentrate, filter, wash and dry to obtain intermediate A. (3) Add acetone solvent to the reactor, purge with nitrogen for protection, add intermediate A and phosphorus tribromide, the mass ratio of intermediate A to phosphorus tribromide is 1:1.5, react for 2 hours at 30 min, add ice water after reaction, concentrate, add ethyl acetate for extraction, dry the organic phase with anhydrous magnesium sulfate, concentrate the filtrate, wash with diethyl ether, and then recrystallize with ethyl acetate to obtain bromine-modified cashew phenol; (4) Epoxy-modified bentonite and bromine-modified cashew phenol were added to N,N-dimethylformamide solvent and stirred evenly. Then, cage-type silsesquioxane and ethylenediamine were added. The mass ratio of epoxy-modified bentonite, bromine-modified cashew phenol, cage-type silsesquioxane and ethylenediamine was 1:1.2:0.8:0.9. The reaction was carried out at 50℃ for 6 hours. After the reaction, the mixture was distilled under reduced pressure, filtered and dried to obtain modified bentonite. (5) Add 2 parts by weight of modified bentonite, 10 parts by weight of acrylic resin and 8 parts by weight of nano silica radiation absorber to a stirrer, stir evenly, and stir at 40°C for 2 hours to obtain the imaging coating of the transparent display screen. Example

[0016] (1) Add bentonite to a 2% hydrochloric acid solution to acidify it, and then disperse it in ethanol. Add KH560 and stir to react. The mass ratio of bentonite to KH560 is 1:1.5. Filter, wash and dry to obtain epoxy-modified bentonite. (2) Add cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol to acetone solvent and stir until homogeneous. The mass ratio of cashew phenol to 2,2-di(bromomethyl)-1,3-propanediol is 1.3:1. Then add sodium hydroxide solution with a molar concentration of 6 mol / L dropwise. React at 70°C for 8 h. After the reaction is completed, add dilute hydrochloric acid dropwise to neutralize. Concentrate, filter, wash and dry to obtain intermediate A. (3) Add acetone solvent to the reactor, purge with nitrogen for protection, add intermediate A and phosphorus tribromide, the mass ratio of intermediate A to phosphorus tribromide is 1:2.1, react for 6 hours at 50 min, add ice water after reaction, concentrate, add ethyl acetate for extraction, dry the organic phase with anhydrous magnesium sulfate, concentrate the filtrate, wash with diethyl ether, and then recrystallize with ethyl acetate to obtain bromine-modified cashew phenol; (4) Epoxy-modified bentonite and bromine-modified cashew phenol were added to N,N-dimethylformamide solvent and stirred evenly. Then, cage-type silsesquioxane and ethylenediamine were added. The mass ratio of epoxy-modified bentonite, bromine-modified cashew phenol, cage-type silsesquioxane and ethylenediamine was 1:1.3:1.1:1.3. The reaction was carried out at 80℃ for 12h. After the reaction, the mixture was distilled under reduced pressure, filtered and dried to obtain modified bentonite. (5) Add 5 parts by weight of modified bentonite, 15 parts by weight of acrylic resin and 16 parts by weight of nano-silica radiation absorber to a stirrer, stir evenly, and stir at 80°C for 4 hours to obtain the imaging coating of the transparent display screen. Example

[0017] (1) Add bentonite to a 1.5% hydrochloric acid solution for acidification to obtain acid-modified bentonite, disperse it in ethanol, add KH560 and stir to react, wherein the mass ratio of bentonite to KH560 is 1:1.35, filter, wash and dry to obtain epoxy-modified bentonite; (2) Add cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol to acetone solvent and stir until homogeneous. The mass ratio of cashew phenol to 2,2-di(bromomethyl)-1,3-propanediol is 1.1-1.3:1. Then add sodium hydroxide solution with a molar concentration of 5 mol / L dropwise and react at 50°C for 5.5 h. After the reaction is completed, add dilute hydrochloric acid dropwise to neutralize, concentrate, filter, wash and dry to obtain intermediate A. (3) Add acetone solvent to the reactor, purge with nitrogen for protection, add intermediate A and phosphorus tribromide, the mass ratio of intermediate A to phosphorus tribromide is 1:1.8, react for 4 hours at 40 min, add ice water after reaction, concentrate, add ethyl acetate for extraction, dry the organic phase with anhydrous magnesium sulfate, concentrate the filtrate, wash with diethyl ether, and then recrystallize with ethyl acetate to obtain bromine-modified cashew phenol; (4) Epoxy-modified bentonite and bromine-modified cashew phenol were added to N,N-dimethylformamide solvent and stirred evenly. Then, cage-type silsesquioxane and ethylenediamine were added. The mass ratio of epoxy-modified bentonite, bromine-modified cashew phenol, cage-type silsesquioxane and ethylenediamine was 1:1.25:0.95:1.1. The reaction was carried out at 65℃ for 9 hours. After the reaction, the mixture was distilled under reduced pressure, filtered and dried to obtain modified bentonite. (5) Add 3.5 parts by weight of modified bentonite, 12.5 parts by weight of acrylic resin and 12 parts by weight of nano silica radiation absorber to a stirrer, stir evenly, and stir at 60°C for 3 hours to obtain the imaging coating of the transparent display screen. Example

[0018] (1) Add bentonite to a 1% hydrochloric acid solution for acidification to obtain acid-modified bentonite, disperse it in ethanol, add KH560 and stir to react, wherein the mass ratio of bentonite to KH560 is 1:1.2, filter, wash and dry to obtain epoxy-modified bentonite; (2) Add cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol to acetone solvent and stir until homogeneous. The mass ratio of cashew phenol to 2,2-di(bromomethyl)-1,3-propanediol is 1.1:1. Then add sodium hydroxide solution with a molar concentration of 4 mol / L dropwise. React at 30°C for 3 h. After the reaction is completed, add dilute hydrochloric acid dropwise to neutralize. Concentrate, filter, wash and dry to obtain intermediate A. (3) Add acetone solvent to the reactor, purge with nitrogen for protection, add intermediate A and phosphorus tribromide, the mass ratio of intermediate A to phosphorus tribromide is 1:2.1, react for 6 hours at 50 min, add ice water after reaction, concentrate, add ethyl acetate for extraction, dry the organic phase with anhydrous magnesium sulfate, concentrate the filtrate, wash with diethyl ether, and then recrystallize with ethyl acetate to obtain bromine-modified cashew phenol; (4) Epoxy-modified bentonite and bromine-modified cashew phenol were added to N,N-dimethylformamide solvent and stirred evenly. Then, cage-type silsesquioxane and ethylenediamine were added. The mass ratio of epoxy-modified bentonite, bromine-modified cashew phenol, cage-type silsesquioxane and ethylenediamine was 1:1.3:1.1:1.3. The reaction was carried out at 80℃ for 12h. After the reaction, the mixture was distilled under reduced pressure, filtered and dried to obtain modified bentonite. (5) Add 3.5 parts by weight of modified bentonite, 12.5 parts by weight of acrylic resin and 12 parts by weight of nano silica radiation absorber to a stirrer, stir evenly, and stir at 60°C for 3 hours to obtain the imaging coating of the transparent display screen. Example

[0019] (1) Add bentonite to a 2% hydrochloric acid solution to acidify it, and then disperse it in ethanol. Add KH560 and stir to react. The mass ratio of bentonite to KH560 is 1:1.5. Filter, wash and dry to obtain epoxy-modified bentonite. (2) Add cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol to acetone solvent and stir until homogeneous. The mass ratio of cashew phenol to 2,2-di(bromomethyl)-1,3-propanediol is 1.3:1. Then add sodium hydroxide solution with a molar concentration of 6 mol / L dropwise. React at 70°C for 8 h. After the reaction is completed, add dilute hydrochloric acid dropwise to neutralize. Concentrate, filter, wash and dry to obtain intermediate A. (3) Add acetone solvent to the reactor, purge with nitrogen for protection, add intermediate A and phosphorus tribromide, the mass ratio of intermediate A to phosphorus tribromide is 1:1.8, react for 4 hours at 40 min, add ice water after reaction, concentrate, add ethyl acetate for extraction, dry the organic phase with anhydrous magnesium sulfate, concentrate the filtrate, wash with diethyl ether, and then recrystallize with ethyl acetate to obtain bromine-modified cashew phenol; (4) Epoxy-modified bentonite and bromine-modified cashew phenol were added to N,N-dimethylformamide solvent and stirred evenly. Then, cage-type silsesquioxane and ethylenediamine were added. The mass ratio of epoxy-modified bentonite, bromine-modified cashew phenol, cage-type silsesquioxane and ethylenediamine was 1:1.25:0.95:1.1. The reaction was carried out at 65℃ for 9 hours. After the reaction, the mixture was distilled under reduced pressure, filtered and dried to obtain modified bentonite. (5) Add 2 parts by weight of modified bentonite, 10 parts by weight of acrylic resin and 8 parts by weight of nano silica radiation absorber to a stirrer, stir evenly, and stir at 40°C for 2 hours to obtain the imaging coating of the transparent display screen.

[0020] Comparative Example 1 Compared to Example 5, no modified bentonite was added and the other raw material components were the same.

[0021] Table 1: Imaging coating test.

[0022] As shown in Table 1, the present invention has a good imaging rate.

[0023] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An imaging coating based on a transparent display screen, characterized in that, The imaging coating based on the transparent display screen comprises the following components by weight: 2-5 parts by weight of modified bentonite, 10-15 parts by weight of acrylic resin, and 8-16 parts by weight of radiation absorber.

2. The imaging coating based on a transparent display screen according to claim 1, characterized in that, The modified bentonite is prepared by: (1) Add bentonite to hydrochloric acid solution for acidification to obtain acid-modified bentonite, disperse it in ethanol, add KH560 and stir to react, filter, wash and dry to obtain epoxy-modified bentonite; (2) Add cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol to acetone solvent and stir until homogeneous. Then add sodium hydroxide solution with a molar concentration of 4-6 mol / L dropwise. React at 30-70℃ for 3-8 h. After the reaction is completed, add dilute hydrochloric acid dropwise to neutralize. Concentrate, filter, wash and dry to obtain intermediate A. (3) Add acetone solvent to the reactor, purge with nitrogen for protection, add intermediate A and phosphorus tribromide, react for 2-6 hours at 30-50 min, add ice water after reaction, concentrate, extract with ethyl acetate, dry the organic phase with anhydrous magnesium sulfate, concentrate the filtrate, wash with diethyl ether, and recrystallize with ethyl acetate to obtain bromine-modified cashew phenol. (4) Add epoxy-modified bentonite and bromine-modified cashew phenol to N,N-dimethylformamide solvent, stir evenly, and then continue to add cage-type silsesquioxane and ethylenediamine. React at 50-80℃ for 6-12h. After the reaction, distill under reduced pressure, filter and dry to obtain modified bentonite.

3. The imaging coating based on a transparent display screen according to claim 2, characterized in that, The mass fraction of hydrochloric acid in (1) is 1-2%.

4. The imaging coating based on a transparent display screen according to claim 2, characterized in that, The mass ratio of bentonite to KH560 in (1) is 1:1.2-1.

5.

5. The imaging coating based on a transparent display screen according to claim 2, characterized in that, The mass ratio of cashew phenol and 2,2-di(bromomethyl)-1,3-propanediol in (2) is 1.1-1.3:

1.

6. The imaging coating based on a transparent display screen according to claim 2, characterized in that, In (3), the mass ratio of intermediate A to phosphorus tribromide is 1:1.5-2.

1.

7. The imaging coating based on a transparent display screen according to claim 1, characterized in that, The mass ratio of epoxy-modified bentonite, bromine-modified cashew phenol, cage-type silsesquioxane, and ethylenediamine in (4) is 1:1.2-1.3:0.8-1.1:0.9-1.

3.

8. The imaging coating based on a transparent display screen according to claim 1, characterized in that, The radiation absorber is nano-silica.

9. A method for preparing an imaging coating based on a transparent display screen as described in any one of claims 1-8, characterized in that, The method for preparing the imaging coating based on the transparent display screen includes the following steps: adding modified bentonite, acrylic resin and radiation absorber to a stirrer, stirring evenly, and stirring at 40-80℃ for 2-4 hours to obtain the imaging coating of the transparent display screen.