CN113897104A - Preparation method of ultraviolet-proof coating for PC glass plate - Google Patents
Preparation method of ultraviolet-proof coating for PC glass plate Download PDFInfo
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- CN113897104A CN113897104A CN202111087626.7A CN202111087626A CN113897104A CN 113897104 A CN113897104 A CN 113897104A CN 202111087626 A CN202111087626 A CN 202111087626A CN 113897104 A CN113897104 A CN 113897104A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
- C07C303/22—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; from sulfonic halides by reactions not involving the formation of halosulfonyl groups
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- C07D249/16—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms condensed with carbocyclic rings or ring systems
- C07D249/18—Benzotriazoles
- C07D249/20—Benzotriazoles with aryl radicals directly attached in position 2
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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- C08K2003/265—Calcium, strontium or barium carbonate
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The invention relates to a preparation method of an ultraviolet-proof coating for a PC glass plate, which comprises the following steps: firstly, weighing the following raw materials in parts by weight: 35-45 parts of acrylic resin emulsion, 5-10 parts of filler, 3-5 parts of auxiliary agent, 3-5 parts of ultraviolet-resistant emulsion and 30-50 parts of deionized water; secondly, adding the filler into the acrylic resin emulsion, adding deionized water, stirring, mixing and grinding until the particle size is less than 10 microns, then adding the auxiliary agent and the ultraviolet-resistant emulsion, sealing and stirring for 30min to prepare the ultraviolet-resistant coating; the ultraviolet-resistant emulsion can endow the coating with excellent ultraviolet resistance, avoid the yellowing phenomenon of the prepared coating, prolong the service life of the coating, reduce the permeability of surface pores by adding the blended nano filler, and improve the sealing effect of the coating.
Description
Technical Field
The invention belongs to the technical field of high polymer coatings, and particularly relates to a preparation method of an ultraviolet-proof coating for a PC glass plate.
Background
The paint is a material which can be coated on the surface of an object by different construction processes to form a continuous solid film with firm adhesion and certain strength, and the film formed by the method is generally called a coating film, also called a paint film or a coating.
The acrylic resin is a general name of polymers of acrylic acid, methacrylic acid and derivatives thereof, the acrylic resin is prepared by copolymerizing acrylic esters, methacrylic esters and other olefinic monomers, and the acrylic resin with different types, different performances and different application occasions can be synthesized by selecting different resin structures, different formulas, different production processes and different solvents.
Disclosure of Invention
In order to solve the technical problems, the invention provides a preparation method of an ultraviolet-proof coating for a PC glass plate.
The purpose of the invention can be realized by the following technical scheme:
a preparation method of an ultraviolet-proof coating for a PC glass plate comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 35-45 parts of acrylic resin emulsion, 5-10 parts of filler, 3-5 parts of auxiliary agent, 3-5 parts of ultraviolet-resistant emulsion and 30-50 parts of deionized water;
secondly, adding a filler into the acrylic resin emulsion, adding deionized water, stirring, mixing and grinding until the particle size is less than 10 microns, then adding the auxiliary agent and the ultraviolet-resistant emulsion, sealing and stirring at the stirring speed of 800-;
the ultraviolet resistant emulsion is prepared by the following steps:
adding cyanuric chloride into the mixed solution, stirring at a constant speed for 15min, then adding a triazine compound, stirring at a constant speed and reacting for 2h, after the reaction is finished, dropwise adding a 25% sodium hydroxide aqueous solution by mass fraction to adjust the pH until the pH is 5, slowly adding hindered amine piperidinol, heating to 45 ℃, stirring and reacting for 2h, adjusting the pH of the system to be 5 every half an hour in the reaction process, distilling and removing acetone to prepare the ultraviolet-resistant emulsion, wherein the dosage ratio of the cyanuric chloride, the mixed solution, the triazine compound and the hindered amine piperidinol is 2 g: 20 mL: 10-15 g: 1.5-1.6 g.
The preparation method comprises the steps of preparing an anti-ultraviolet emulsion, wherein the anti-ultraviolet emulsion contains an anti-ultraviolet base material, reacting cyanuric chloride with a triazine compound firstly in the preparation process, reacting the triazine compound with hindered amine piperidinol to prepare the anti-ultraviolet base material, introducing hindered amine light stabilizing groups into the triazine compound to prepare the anti-ultraviolet base material, and endowing the emulsion with excellent anti-ultraviolet performance through the triazine compound and the hindered amine light stabilizing groups.
Further: the triazine compound is prepared by the following steps:
step S1, adding 3-amino-4-hydroxybenzenesulfonic acid and 35 mass percent hydrochloric acid into deionized water, stirring at a constant speed until the mixture is dissolved, placing the mixture into an ice water bath, slowly dropwise adding 32 mass percent sodium nitrite aqueous solution, reacting for 30min in the ice water bath, filtering, collecting filtrate, namely the aqueous solution of the intermediate 1, and controlling the dosage ratio of the 3-amino-4-hydroxybenzenesulfonic acid, the hydrochloric acid, the deionized water and the sodium nitrite aqueous solution to be 7.5 g: 10 mL: 35 mL: 6 mL;
in step S1, 3-amino-4-hydroxybenzenesulfonic acid reacts with sodium nitrite and hydrochloric acid to generate intermediate 1, and the reaction process is as follows:
step S2, adding m-phenylenediamine and 35% by mass of hydrochloric acid into deionized water, stirring at a constant speed until the m-phenylenediamine and the hydrochloric acid are dissolved, adding an aqueous solution of an intermediate 1, slowly dropwise adding an aqueous solution of sodium acetate trihydrate after the addition, maintaining the temperature of the system to be 10 ℃ in the dropwise adding process, keeping the temperature for reaction for 2h after the dropwise addition is finished, then heating to room temperature for continuous reaction for 2h, and filtering to obtain an intermediate 2, wherein the dosage ratio of the m-phenylenediamine, the hydrochloric acid, the aqueous solution of the intermediate 1, the aqueous solution of sodium acetate trihydrate and the deionized water is controlled to be 4.5-4.8 g: 4 mL: 49.8-52 mL: 45 mL: 90 mL;
in the step S2, m-phenylenediamine reacts with the intermediate 1 to generate an intermediate 2, and the reaction process is as follows:
step S3, adding copper sulfate pentahydrate and concentrated ammonia water into deionized water, stirring at a constant speed and reacting for 2 hours to obtain a product a, pouring the product a into a reaction kettle, adding an intermediate 2, heating to 95 ℃, keeping the temperature and reacting for 2 hours, cooling to room temperature, filtering, adding a filter cake into a hydrochloric acid solution with the mass fraction of 15%, stirring for 1 hour, filtering, drying, placing into deionized water to obtain a suspension, adding concentrated ammonia water dropwise to adjust the pH until the pH is 9, decolorizing with activated carbon, filtering, adjusting the system to be neutral, crystallizing, filtering, and drying to obtain a triazine compound, controlling the dosage ratio of copper sulfate pentahydrate, concentrated ammonia water and deionized water to be 25.6 g: 105 mL: 60mL, and the dosage ratio of the product a, the intermediate 2 and the hydrochloric acid solution to be 180 mL: 6.8-8.4 g: 50 mL;
in the step S3, the copper sulfate pentahydrate and the concentrated ammonia water react to generate a product a, and then the product a reacts with the intermediate 2 to prepare an intermediate 3, namely the triazine compound, wherein the reaction process is as follows:
further: the mixed liquid is formed by mixing acetone and ice water according to the volume ratio of 1: 1.
Further: the auxiliary agent is prepared by mixing the following components in parts by weight: 1-1.5 parts of film-forming additive, 0.4-0.6 part of defoaming agent, 0.1-0.5 part of thickening agent, 0.1-0.3 part of preservative and 0.4-0.8 part of dispersing agent.
Further: the filler is formed by mixing nano calcium carbonate, nano silicon dioxide and superfine talcum powder according to the weight ratio of 1: 1.
The invention has the beneficial effects that:
the ultraviolet-resistant emulsion is prepared and then is blended to prepare the coating, the ultraviolet-resistant emulsion can endow the coating with excellent ultraviolet-resistant performance, the ultraviolet-resistant emulsion contains an ultraviolet-resistant base material, cyanuric chloride firstly reacts with a triazine compound in the preparation process, the triazine compound is an intermediate 3, and then the intermediate is reacted with hindered amine piperidinol to prepare the ultraviolet-resistant base material, a hindered amine light stabilizing group is introduced into the triazine compound to prepare the ultraviolet-resistant base material, the emulsion is endowed with excellent ultraviolet-resistant performance through the triazine compound and the hindered amine light stabilizing group, the yellowing phenomenon of the prepared coating is avoided, the service life of the coating is prolonged, and the permeability of surface pores can be reduced through adding the blended nano filler, so that the sealing effect of the coating is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The ultraviolet resistant emulsion is prepared by the following steps:
step S1, adding 3-amino-4-hydroxybenzenesulfonic acid and 35 mass percent hydrochloric acid into deionized water, stirring at a constant speed until the mixture is dissolved, placing the mixture into an ice water bath, slowly dropwise adding 32 mass percent sodium nitrite aqueous solution, reacting for 30min in the ice water bath, filtering, collecting filtrate, namely the aqueous solution of the intermediate 1, and controlling the dosage ratio of the 3-amino-4-hydroxybenzenesulfonic acid, the hydrochloric acid, the deionized water and the sodium nitrite aqueous solution to be 7.5 g: 10 mL: 35 mL: 6 mL;
step S2, adding m-phenylenediamine and 35% by mass of hydrochloric acid into deionized water, stirring at a constant speed until the m-phenylenediamine and the hydrochloric acid are dissolved, adding an aqueous solution of an intermediate 1, slowly dropwise adding an aqueous solution of sodium acetate trihydrate after the addition, maintaining the temperature of the system to be 10 ℃ in the dropwise adding process, keeping the temperature for reaction for 2h after the dropwise addition is finished, then heating to room temperature to continue the reaction for 2h, and filtering to obtain an intermediate 2, wherein the dosage ratio of the m-phenylenediamine, the hydrochloric acid, the aqueous solution of the intermediate 1, the aqueous solution of sodium acetate trihydrate and the deionized water is controlled to be 4.5 g: 4 mL: 49.8 mL: 45 mL: 90 mL;
step S3, adding copper sulfate pentahydrate and concentrated ammonia water into deionized water, stirring at a constant speed and reacting for 2 hours to obtain a product a, pouring the product a into a reaction kettle, adding an intermediate 2, heating to 95 ℃, keeping the temperature and reacting for 2 hours, cooling to room temperature, filtering, adding a filter cake into a hydrochloric acid solution with the mass fraction of 15%, stirring for 1 hour, filtering, drying, placing into deionized water to obtain a suspension, adding concentrated ammonia water dropwise to adjust the pH until the pH is 9, decolorizing with activated carbon, filtering, adjusting the system to be neutral, crystallizing, filtering, and drying to obtain a triazine compound, controlling the dosage ratio of copper sulfate pentahydrate, concentrated ammonia water and deionized water to be 25.6 g: 105 mL: 60mL, and the dosage ratio of the product a, the intermediate 2 and the hydrochloric acid solution to be 180 mL: 6.8 g: 50 mL;
step S4, adding cyanuric chloride into the mixed solution, stirring at a constant speed for 15min, then adding a triazine compound, stirring at a constant speed and reacting for 2h, after the reaction is finished, dropwise adding a 25% sodium hydroxide aqueous solution by mass fraction to adjust the pH until the pH is 5, slowly adding 2,2,6, 6-tetramethyl piperidinol, heating to 45 ℃, stirring and reacting for 2h, adjusting the pH of the system to 5 every half hour in the reaction process, distilling and removing acetone to prepare the ultraviolet-resistant emulsion, wherein the dosage ratio of the cyanuric chloride, the mixed solution, the triazine compound and the 2,2,6, 6-tetramethyl piperidinol is 2 g: 20 mL: 10 g: 1.5 g.
The mixed liquid is formed by mixing acetone and ice water according to the volume ratio of 1: 1.
Example 2
The ultraviolet resistant emulsion is prepared by the following steps:
step S1, adding 3-amino-4-hydroxybenzenesulfonic acid and 35 mass percent hydrochloric acid into deionized water, stirring at a constant speed until the mixture is dissolved, placing the mixture into an ice water bath, slowly dropwise adding 32 mass percent sodium nitrite aqueous solution, reacting for 30min in the ice water bath, filtering, collecting filtrate, namely the aqueous solution of the intermediate 1, and controlling the dosage ratio of the 3-amino-4-hydroxybenzenesulfonic acid, the hydrochloric acid, the deionized water and the sodium nitrite aqueous solution to be 7.5 g: 10 mL: 35 mL: 6 mL;
step S2, adding m-phenylenediamine and 35% by mass of hydrochloric acid into deionized water, stirring at a constant speed until the m-phenylenediamine and the hydrochloric acid are dissolved, adding an aqueous solution of an intermediate 1, slowly dropwise adding an aqueous solution of sodium acetate trihydrate after the addition, maintaining the temperature of the system to be 10 ℃ in the dropwise adding process, keeping the temperature for reaction for 2h after the dropwise addition is finished, then heating to room temperature to continue the reaction for 2h, and filtering to obtain an intermediate 2, wherein the dosage ratio of the m-phenylenediamine, the hydrochloric acid, the aqueous solution of the intermediate 1, the aqueous solution of sodium acetate trihydrate and the deionized water is controlled to be 4.6 g: 4 mL: 51 mL: 45 mL: 90 mL;
step S3, adding copper sulfate pentahydrate and concentrated ammonia water into deionized water, stirring at a constant speed and reacting for 2 hours to obtain a product a, pouring the product a into a reaction kettle, adding an intermediate 2, heating to 95 ℃, keeping the temperature and reacting for 2 hours, cooling to room temperature, filtering, adding a filter cake into a hydrochloric acid solution with the mass fraction of 15%, stirring for 1 hour, filtering, drying, placing into deionized water to obtain a suspension, adding concentrated ammonia water dropwise to adjust the pH until the pH is 9, decolorizing with activated carbon, filtering, adjusting the system to be neutral, crystallizing and separating out, filtering and drying to obtain a triazine compound, controlling the dosage ratio of copper sulfate pentahydrate, concentrated ammonia water and deionized water to be 25.6 g: 105 mL: 60mL, and controlling the dosage ratio of the product a, the intermediate 2 and the hydrochloric acid solution to be 180 mL: 7.6 g: 50 mL;
step S4, adding cyanuric chloride into the mixed solution, stirring at a constant speed for 15min, then adding a triazine compound, stirring at a constant speed and reacting for 2h, after the reaction is finished, dropwise adding a 25% sodium hydroxide aqueous solution by mass fraction to adjust the pH until the pH is 5, slowly adding 2,2,6, 6-tetramethyl piperidinol, heating to 45 ℃, stirring and reacting for 2h, adjusting the pH of the system to 5 every half hour in the reaction process, distilling and removing acetone to prepare the ultraviolet-resistant emulsion, wherein the dosage ratio of the cyanuric chloride, the mixed solution, the triazine compound and the 2,2,6, 6-tetramethyl piperidinol is 2 g: 20 mL: 14 g: 1.6 g.
The mixed liquid is formed by mixing acetone and ice water according to the volume ratio of 1: 1.
Example 3
The ultraviolet resistant emulsion is prepared by the following steps:
step S1, adding 3-amino-4-hydroxybenzenesulfonic acid and 35 mass percent hydrochloric acid into deionized water, stirring at a constant speed until the mixture is dissolved, placing the mixture into an ice water bath, slowly dropwise adding 32 mass percent sodium nitrite aqueous solution, reacting for 30min in the ice water bath, filtering, collecting filtrate, namely the aqueous solution of the intermediate 1, and controlling the dosage ratio of the 3-amino-4-hydroxybenzenesulfonic acid, the hydrochloric acid, the deionized water and the sodium nitrite aqueous solution to be 7.5 g: 10 mL: 35 mL: 6 mL;
step S2, adding m-phenylenediamine and 35% by mass of hydrochloric acid into deionized water, stirring at a constant speed until the m-phenylenediamine and the hydrochloric acid are dissolved, adding an aqueous solution of an intermediate 1, slowly dropwise adding an aqueous solution of sodium acetate trihydrate after the addition, maintaining the temperature of the system to be 10 ℃ in the dropwise adding process, keeping the temperature for reaction for 2h after the dropwise addition is finished, then heating to room temperature to continue the reaction for 2h, and filtering to obtain an intermediate 2, wherein the dosage ratio of the m-phenylenediamine, the hydrochloric acid, the aqueous solution of the intermediate 1, the aqueous solution of sodium acetate trihydrate and the deionized water is controlled to be 4.8 g: 4 mL: 52 mL: 45 mL: 90 mL;
step S3, adding copper sulfate pentahydrate and concentrated ammonia water into deionized water, stirring at a constant speed and reacting for 2 hours to obtain a product a, pouring the product a into a reaction kettle, adding an intermediate 2, heating to 95 ℃, keeping the temperature and reacting for 2 hours, cooling to room temperature, filtering, adding a filter cake into a hydrochloric acid solution with the mass fraction of 15%, stirring for 1 hour, filtering, drying, placing into deionized water to obtain a suspension, adding concentrated ammonia water dropwise to adjust the pH until the pH is 9, decolorizing with activated carbon, filtering, adjusting the system to be neutral, crystallizing, filtering, and drying to obtain a triazine compound, controlling the dosage ratio of copper sulfate pentahydrate, concentrated ammonia water and deionized water to be 25.6 g: 105 mL: 60mL, and the dosage ratio of the product a, the intermediate 2 and the hydrochloric acid solution to be 180 mL: 8.4 g: 50 mL;
step S4, adding cyanuric chloride into the mixed solution, stirring at a constant speed for 15min, then adding a triazine compound, stirring at a constant speed and reacting for 2h, after the reaction is finished, dropwise adding a 25% sodium hydroxide aqueous solution by mass fraction to adjust the pH until the pH is 5, slowly adding 2,2,6, 6-tetramethyl piperidinol, heating to 45 ℃, stirring and reacting for 2h, adjusting the pH of the system to 5 every half hour in the reaction process, distilling and removing acetone to prepare the ultraviolet-resistant emulsion, wherein the dosage ratio of the cyanuric chloride, the mixed solution, the triazine compound and the 2,2,6, 6-tetramethyl piperidinol is 2 g: 20 mL: 15 g: 1.6 g.
The mixed liquid is formed by mixing acetone and ice water according to the volume ratio of 1: 1.
Example 4
A preparation method of an ultraviolet-proof coating for a PC glass plate comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 35 parts of acrylic resin emulsion, 5 parts of filler, 3 parts of auxiliary agent, 3 parts of the ultraviolet-resistant emulsion prepared in example 1 and 30 parts of deionized water;
and secondly, adding the filler into the acrylic resin emulsion, adding deionized water, stirring, mixing, grinding until the particle size is less than 10 microns, adding the auxiliary agent and the ultraviolet-resistant emulsion, sealing and stirring at the stirring speed of 800r/min for 30min to obtain the ultraviolet-resistant coating.
The auxiliary agent is prepared by mixing the following components in parts by weight: 1 part of ethylene glycol, 0.4 part of butanol, 0.1 part of dibutyl phthalate, 0.1 part of methylisothiazolinone and 0.4 part of sodium dodecyl sulfate.
The filler is formed by mixing nano calcium carbonate, nano silicon dioxide and superfine talcum powder according to the weight ratio of 1: 1.
Example 5
A preparation method of an ultraviolet-proof coating for a PC glass plate comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 40 parts of acrylic resin emulsion, 8 parts of filler, 4 parts of auxiliary agent, 4 parts of ultraviolet-resistant emulsion prepared in example 1 and 40 parts of deionized water;
and secondly, adding the filler into the acrylic resin emulsion, adding deionized water, stirring, mixing, grinding until the particle size is less than 10 microns, adding the auxiliary agent and the ultraviolet-resistant emulsion, sealing and stirring at the stirring speed of 1000r/min for 30min to obtain the ultraviolet-resistant coating.
The auxiliary agent is prepared by mixing the following components in parts by weight: 1.2 parts of ethylene glycol, 0.5 part of butanol, 0.3 part of dibutyl phthalate, 0.2 part of methylisothiazolinone and 0.5 part of sodium dodecyl sulfate.
The filler is formed by mixing nano calcium carbonate, nano silicon dioxide and superfine talcum powder according to the weight ratio of 1: 1.
Example 6
A preparation method of an ultraviolet-proof coating for a PC glass plate comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 45 parts of acrylic resin emulsion, 10 parts of filler, 5 parts of auxiliary agent, 5 parts of ultraviolet-resistant emulsion prepared in example 1 and 50 parts of deionized water;
and secondly, adding the filler into the acrylic resin emulsion, adding deionized water, stirring, mixing, grinding until the particle size is less than 10 microns, adding the auxiliary agent and the ultraviolet-resistant emulsion, sealing and stirring at the stirring speed of 1000r/min for 30min to obtain the ultraviolet-resistant coating.
The auxiliary agent is prepared by mixing the following components in parts by weight: 1.5 parts of ethylene glycol, 0.6 part of butanol, 0.5 part of dibutyl phthalate, 0.3 part of methylisothiazolinone and 0.8 part of sodium dodecyl sulfate.
The filler is formed by mixing nano calcium carbonate, nano silicon dioxide and superfine talcum powder according to the weight ratio of 1: 1.
Comparative example 1
This comparative example compares to example 4 without the addition of an ultraviolet resistant emulsion.
Comparative example 2
This comparative example is an acrylic coating produced by a commercially available company.
The PC board was cut into five pieces of the same size and thickness, each of which was 30mmX30mmX2mm, sterilized, and electrically discharged at a voltage of 15kV and a frequency of 350Hz for 10 seconds, each of which was coated with the coatings of examples 4-6 and comparative examples 1-2, and the UV-shielding rates were measured according to the standard of GBA2680-1994, and the results are shown in the following table:
it can be seen from the above table that the uv resistant coating prepared by the present invention has excellent uv shielding properties.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. A preparation method of an ultraviolet-proof coating for a PC glass plate is characterized by comprising the following steps: the method comprises the following steps:
firstly, weighing the following raw materials in parts by weight: 35-45 parts of acrylic resin emulsion, 5-10 parts of filler, 3-5 parts of auxiliary agent, 3-5 parts of ultraviolet-resistant emulsion and 30-50 parts of deionized water;
secondly, adding a filler into the acrylic resin emulsion, adding deionized water, stirring, mixing and grinding until the particle size is less than 10 microns, then adding the auxiliary agent and the ultraviolet-resistant emulsion, sealing and stirring at the stirring speed of 800-;
the ultraviolet resistant emulsion is prepared by the following steps:
adding cyanuric chloride into the mixed solution, stirring at a constant speed for 15min, then adding triazine compounds, stirring at a constant speed and reacting for 2h, after the reaction is finished, dropwise adding a sodium hydroxide aqueous solution to adjust the pH until the pH is 5, slowly adding hindered amine piperidinol, heating to 45 ℃, stirring and reacting for 2h, adjusting the pH of the system to 5 every half hour in the reaction process, distilling and removing acetone to prepare the ultraviolet-resistant emulsion.
2. The method for preparing the ultraviolet-proof coating for the PC glass plate according to claim 1, wherein the ultraviolet-proof coating comprises the following steps: the triazine compound is prepared by the following steps:
step S1, adding 3-amino-4-hydroxybenzenesulfonic acid and hydrochloric acid into deionized water, stirring at a constant speed until the mixture is dissolved, placing the mixture into an ice water bath, slowly dropwise adding a sodium nitrite water solution, reacting in the ice water bath for 30min, filtering, and collecting filtrate, namely the water solution of the intermediate 1;
step S2, adding m-phenylenediamine and hydrochloric acid into deionized water, stirring at a constant speed until the m-phenylenediamine and the hydrochloric acid are dissolved, adding an aqueous solution of the intermediate 1, slowly dropwise adding an aqueous solution of sodium acetate trihydrate after the addition, maintaining the temperature of the system to be 10 ℃ in the dropwise adding process, keeping the temperature for reaction for 2 hours after the dropwise adding is finished, then heating to room temperature, continuing the reaction for 2 hours, and filtering to obtain an intermediate 2;
step S3, adding copper sulfate pentahydrate and concentrated ammonia water into deionized water, stirring at a constant speed and reacting for 2 hours to obtain a product a, pouring the product a into a reaction kettle, adding the intermediate 2, heating to 95 ℃, keeping the temperature and reacting for 2 hours, cooling to room temperature, filtering, adding a filter cake into a hydrochloric acid solution, stirring for 1 hour, filtering, drying, placing into deionized water to obtain a suspension, adding the concentrated ammonia water dropwise to adjust the pH until the pH is 9, decolorizing with activated carbon, filtering, adjusting the system to be neutral, crystallizing, precipitating, filtering, and drying to obtain the triazine compound.
3. The method for preparing the ultraviolet-proof coating for the PC glass plate according to claim 1, wherein the ultraviolet-proof coating comprises the following steps: the dosage ratio of the cyanuric chloride to the mixed liquid to the triazine compound to the hindered amine piperidinol is controlled to be 2g to 20mL to 10-15g to 1.5-1.6 g.
4. The method for preparing the ultraviolet-proof coating for the PC glass plate according to claim 2, wherein the ultraviolet-proof coating comprises the following steps: in step S1, the dosage ratio of the 3-amino-4-hydroxybenzenesulfonic acid, the hydrochloric acid, the deionized water and the sodium nitrite aqueous solution is controlled to be 7.5 g: 10 mL: 35 mL: 6mL, in step S2, the dosage ratio of the m-phenylenediamine, the hydrochloric acid, the intermediate 1 aqueous solution, the sodium acetate trihydrate aqueous solution and the deionized water is controlled to be 4.5-4.8 g: 4 mL: 49.8-52 mL: 45 mL: 90mL, in step S3, the dosage ratio of the copper sulfate pentahydrate, the concentrated ammonia water and the deionized water is controlled to be 25.6 g: 105 mL: 60mL, and the dosage ratio of the product a, the intermediate 2 and the hydrochloric acid solution is 180 mL: 6.8-8.4 g: 50 mL.
5. The method for preparing the ultraviolet-proof coating for the PC glass plate according to claim 1, wherein the ultraviolet-proof coating comprises the following steps: the mixed liquid is formed by mixing acetone and ice water according to the volume ratio of 1: 1.
6. The method for preparing the ultraviolet-proof coating for the PC glass plate according to claim 1, wherein the ultraviolet-proof coating comprises the following steps: the auxiliary agent is prepared by mixing the following components in parts by weight: 1-1.5 parts of film-forming additive, 0.4-0.6 part of defoaming agent, 0.1-0.5 part of thickening agent, 0.1-0.3 part of preservative and 0.4-0.8 part of dispersing agent.
7. The method for preparing the ultraviolet-proof coating for the PC glass plate according to claim 1, wherein the ultraviolet-proof coating comprises the following steps: the filler is formed by mixing nano calcium carbonate, nano silicon dioxide and superfine talcum powder according to the weight ratio of 1: 1.
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