Rapid preparation method of water-based UV-cured epoxy acrylate coating
Through precise analysis and high-speed disperser, premix of epoxy resin, acrylic and photoinitiator, and optimized esterification reaction in the microreactor. Combined with microwave radiation and UV curing technology, the problems of long reaction time and unstable quality during the preparation of traditional coatings are solved, and efficient and stable preparation of aqueous UV cured epoxy acrylate coatings are achieved.
Patent Information
- Application Number
- CN202510512391.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-05-30
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The preparation process of traditional aqueous UV cured epoxy acrylate coatings has a long reaction time and the control of reaction conditions is not accurate enough, resulting in unstable product quality.
A uniform premixed liquid was prepared by accurately analyzing the premix ratio of epoxy resin, acrylic acid and photoinitiator and reversed by a high-speed disperser. The inverted homogeneous premix is integrated into the micro reactor and configured with optimized esterification reaction parameters, including esterification reaction temperature and flow rate. Use microwave radiation technology to accurately control the reaction temperature and speed up the reaction rate. Finally, a cured coating with excellent adhesion was prepared by UV curing technology.
It significantly improves the mixing uniformity of reactants and the efficiency of esterification reaction, shortens the production cycle, improves the performance and adhesion of the coating, and ensures the stability of product quality.
Smart Images
Figure CN120059565A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a rapid preparation method of a waterborne UV-curable epoxy acrylate coating, belonging to the field of radiation curing technology. Background Art
[0002] The waterborne UV-curable epoxy acrylate coating refers to a coating that uses waterborne epoxy acrylate resin as the main film-forming substance and undergoes a curing reaction triggered by ultraviolet light (UV) irradiation to form a high-performance coating. It combines the low VOC (volatile organic compound) characteristics of waterborne coatings and the high efficiency of UV curing technology.
[0003] Currently, the preparation of traditional waterborne UV-curable epoxy acrylate coatings is to carry out an esterification reaction between epoxy resin and acrylic acid under preset heating conditions to generate epoxy acrylate resin; then a neutralizing agent and water are added for waterborne treatment to form a stable emulsion; finally, a photoinitiator and other additives are added, and after stirring evenly, the finished coating is obtained. This method has a long reaction time (usually several hours) and the control of reaction conditions is not precise enough, which easily leads to unstable product quality. Summary of the Invention
[0004] The present invention provides a rapid preparation method of a waterborne UV-curable epoxy acrylate coating, and its main purpose is to improve the performance of the cured epoxy acrylate coating.
[0005] To achieve the above object, a rapid preparation method of a waterborne UV-curable epoxy acrylate coating provided by the present invention includes: Analyze the premixing ratio of epoxy resin, acrylic acid, and photoinitiator. Based on the premixing ratio, premix the epoxy resin, acrylic acid, and photoinitiator to obtain a premixed solution, and use a preset high-speed disperser to perform inversion on the premixed solution to obtain a uniformly inverted premixed solution; Integrate the uniformly inverted premixed solution into a preset microreactor, and configure the esterification reaction parameters of the microreactor. Among them, the esterification reaction parameters include: esterification reaction temperature and esterification reaction flow rate. Based on the esterification reaction parameters, perform the esterification reaction of the uniformly inverted premixed solution in the microreactor to obtain an esterification reactant; Analyze the viscosity coefficient and pH value of the esterification reactant. According to the viscosity coefficient and pH value, optimize the esterification reaction parameters to obtain optimized esterification reaction parameters. Based on the optimized esterification reaction parameters, determine the finally formed epoxy acrylate of the esterification reactant; The epoxy acrylate is subjected to microwave radiation to obtain a radiation epoxy acrylate, the local heat of the radiation epoxy acrylate is calculated, based on the local heat, the neutralizer ratio of the radiation epoxy acrylate is analyzed, and the radiation epoxy acrylate is hydrophilized by the neutralizer ratio to obtain an aqueous epoxy acrylate emulsion; The aqueous epoxy acrylate emulsion is subjected to UV curing to obtain a cured coating, the adhesion of the cured coating is calculated, and when the adhesion meets a preset adhesion threshold, the cured coating is used as a target cured coating.
[0006] Optionally, the analysis of the premixing ratio of the epoxy resin, acrylic acid, and photoinitiator includes: Defining an experimental matrix for the epoxy resin, acrylic acid, and photoinitiator; Based on the experimental matrix, constructing a mixing ratio group for the epoxy resin, acrylic acid, and photoinitiator; Collecting mixing data of the mixing ratio group; Based on the mixing data, establishing a ratio analysis model for the mixing ratio group; According to the ratio analysis model, determining the premixing ratio of the epoxy resin, acrylic acid, and photoinitiator.
[0007] Optionally, the use of a preset high-speed disperser to reverse the premixed liquid to obtain a reversely uniform premixed liquid includes: Defining the disperser parameters of the high-speed disperser; According to the disperser parameters, dispersing the premixed liquid to obtain a dispersed premixed liquid; Integrating a preset emulsifier into the dispersed premixed liquid to obtain an emulsified premixed liquid; Determining the inversion point of the emulsified premixed liquid; According to the inversion point, reversing the emulsified premixed liquid to obtain a reversed premixed liquid; Removing the undispersed particles of the reversed premixed liquid to obtain the reversely uniform premixed liquid.
[0008] Optionally, the determination of the inversion point of the emulsified premixed liquid includes: Determining the oil phase and water phase of the premixed liquid of the emulsified premixed liquid; Respectively determining the volume of the oil phase of the premixed liquid, the viscosity of the oil phase of the premixed liquid, the volume of the water phase of the premixed liquid, and the viscosity of the water phase of the premixed liquid; Based on the volume of the oil phase of the premixed liquid, the viscosity of the oil phase of the premixed liquid, the volume of the water phase of the premixed liquid, and the viscosity of the water phase of the premixed liquid, the inversion point of the emulsified premixed liquid is calculated using the following formula: Wherein, represents the inversion point of the emulsified premix, represents the volume of the oil phase of the premix, represents the volume of the aqueous phase of the premix, represents the viscosity of the aqueous phase of the premix, represents the viscosity of the oil phase of the premix.
[0009] Optionally, based on the esterification reaction parameters, performing the esterification reaction of the inverted homogeneous premix in the microreactor to obtain an esterification reactant, including: analyzing the premix characteristics of the inverted homogeneous premix; determining the channel parameters of the microreactor; constructing a channel geometry design of the microreactor according to the premix characteristics and the channel parameters; calculating the mixing efficiency of the inverted homogeneous premix in the channel geometry design; When the mixing efficiency meets a preset mixing threshold, based on the channel geometry design, integrating the inverted homogeneous premix into the microreactor, and performing the esterification reaction of the inverted homogeneous premix in the microreactor through the esterification reaction parameters to obtain an esterification reactant.
[0010] Optionally, the analyzing the viscosity coefficient and pH value of the esterification reactant includes: filtering the esterification reactant to obtain a filtered esterification reactant; determining a rotational viscometer and a pH electrode for the filtered esterification reactant; determining the viscosity coefficient of the filtered esterification reactant based on the rotational viscometer; calibrating the pH electrode to obtain a calibrated pH electrode; analyzing the electrode response characteristics of the calibrated pH electrode; determining a pH calibration curve of the esterification reactant according to the calibrated pH electrode and the electrode response characteristics; combining the electrode response characteristics and the pH calibration curve to determine the pH value of the esterification reactant.
[0011] Optionally, the combining the electrode response characteristics and the pH calibration curve to determine the pH value of the esterification reactant includes: determining the electrode potential of the esterification reactant according to the electrode response characteristics; defining the equilibrium potential of the esterification reactant based on the pH calibration curve; Based on the electrode potential and the equilibrium potential, calculating the pH value of the esterification reactant using the following formula: Among them, represents the pH value of the esterification reactant, represents the electrode potential, represents the equilibrium potential, represents the gas constant of the esterification reactant, represents the absolute temperature, represents the number of electron transfers, represents the Faraday constant, represents the standard pH value of the esterification reactant.
[0012] Optionally, calculating the local heat of the radiation epoxy acrylate includes: defining the physical properties of the radiation epoxy acrylate, where the physical properties include the mass of the epoxy acrylate and the specific heat capacity of the epoxy acrylate; analyzing the local temperature change of the radiation epoxy acrylate based on the physical properties; analyzing the local heat of the radiation epoxy acrylate through the local temperature change, the mass of the epoxy acrylate, and the specific heat capacity of the epoxy acrylate.
[0013] Optionally, analyzing the neutralizer ratio of the radiation epoxy acrylate based on the local heat includes: analyzing the neutralization reaction equation of the radiation epoxy acrylate; establishing a neutralizer ratio model of the radiation epoxy acrylate according to the neutralization reaction equation; analyzing the neutralization reaction state of the radiation epoxy acrylate under different neutralizer ratios according to the local heat by using the neutralizer ratio model; determining the neutralizer ratio of the radiation epoxy acrylate based on the neutralization reaction state.
[0014] To solve the above problems, the present invention also provides an electronic device, which includes: at least one processor; and, a memory communicatively connected to the at least one processor; among them, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the above-mentioned rapid preparation method of the waterborne UV-curable epoxy acrylate coating.
[0015] To solve the above problems, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored, and the at least one instruction is executed by a processor in an electronic device to implement the above-mentioned rapid preparation method of the waterborne UV-curable epoxy acrylate coating.
[0016] Compared with the problems described in the background art, first, by precisely analyzing the premixing ratio of epoxy resin, acrylic acid, and photoinitiator and using a high-speed disperser for phase inversion, a uniform premixed liquid was prepared. This step significantly improved the mixing uniformity of the reactants, laying a foundation for the smooth progress of the subsequent esterification reaction. The uniformity of the premixed liquid ensured the quality and performance consistency of the final product. The inverted uniform premixed liquid was integrated into a microreactor, and optimized esterification reaction parameters were configured, including appropriate esterification reaction temperature and flow rate, effectively improving the efficiency and selectivity of the esterification reaction. The microreactor technology not only accelerated the reaction rate but also reduced the generation of by-products, thereby enhancing the purity and performance of epoxy acrylate. By analyzing the viscosity coefficient and pH value of the esterification reactants, the esterification reaction parameters were optimized, further ensuring that the molecular weight and molecular structure of epoxy acrylate met the expectations, which is crucial for the final performance of the coating. The application of microwave radiation technology and the calculation of the local heat of the irradiated epoxy acrylate could precisely control the reaction temperature, accelerate the reaction rate, and maintain the stability of the product quality. By analyzing the neutralizer ratio and implementing waterborne treatment, a stable waterborne epoxy acrylate emulsion was successfully prepared. This emulsion had good dispersibility and storage stability. Finally, through UV curing technology, a cured coating with excellent adhesion was obtained. When the adhesion of the coating met the preset adhesion threshold, the target cured coating was established. This cured coating not only had good mechanical properties such as abrasion resistance and chemical resistance but also had the characteristics of rapid curing, greatly shortening the production cycle and improving the production efficiency. Therefore, the present invention can improve the performance of cured epoxy acrylate coatings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic flow chart of a method for rapidly preparing a waterborne UV-curable epoxy acrylate coating provided by an embodiment of the present invention; The realization, functional features, and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0019] An embodiment of the present application provides a rapid preparation method for a waterborne UV-curable epoxy acrylate coating. The execution subject of the rapid preparation method for the waterborne UV-curable epoxy acrylate coating includes, but is not limited to, at least one of electronic devices such as a server, a terminal, etc. that can be configured to execute the method provided by the embodiment of the present application. In other words, the rapid preparation method for the waterborne UV-curable epoxy acrylate coating can be executed by software or hardware installed on a terminal device or a server device. The server includes, but is not limited to: a single server, a server cluster, a cloud server, or a cloud server cluster, etc.
[0020] Example 1: Refer to Figure 1 As shown, it is a schematic flowchart of a rapid preparation method for a waterborne UV-curable epoxy acrylate coating provided by an embodiment of the present invention. In this embodiment, the rapid preparation method for the waterborne UV-curable epoxy acrylate coating includes: S1. Analyze the premixing ratio of epoxy resin, acrylic acid, and photoinitiator. Based on the premixing ratio, premix the epoxy resin, acrylic acid, and photoinitiator to obtain a premixed solution, and use a preset high-speed disperser to perform inversion on the premixed solution to obtain a uniformly inverted premixed solution.
[0021] Analyzing the premixing ratio of epoxy resin, acrylic acid, and photoinitiator can analyze in detail the premixing ratio of epoxy resin, acrylic acid, and photoinitiator, and determine an appropriate mixing ratio to prepare a high-performance waterborne UV-curable epoxy acrylate coating.
[0022] Specifically, the analysis of the premixing ratio of epoxy resin, acrylic acid, and photoinitiator includes: Define the experimental matrix of the epoxy resin, acrylic acid, and photoinitiator; Based on the experimental matrix, construct a mixing ratio group of the epoxy resin, acrylic acid, and photoinitiator; Collect the mixing data of the mixing ratio group; Based on the mixing data, establish a ratio analysis model of the mixing ratio group; According to the ratio analysis model, determine the premixing ratio of the epoxy resin, acrylic acid, and photoinitiator.
[0023] Among them, the experimental matrix refers to the specific proportion of each component used in different experiments. The mixing ratio group refers to a series of mixed combinations of epoxy resin, acrylic acid, and photoinitiator with different ratios designed according to the experimental matrix. The mixing data refers to the information collected during the experiment on the mixing ratio group, including but not limited to the appearance, viscosity, curing time, hardness, chemical resistance, etc. of the mixture. The ratio analysis model refers to a model used to analyze the ratios of epoxy resin, acrylic acid, and photoinitiator. The premixed ratio refers to the optimal mixing ratio of epoxy resin, acrylic acid, and photoinitiator determined according to the ratio analysis model.
[0024] Optionally, the ratio analysis model of the mixing ratio group established based on the mixing data can be obtained by using the response surface method (RSM) and multi-scale simulation to analyze the mixing data.
[0025] The present invention uses a preset high-speed disperser to reverse the premixed liquid, and a uniformly reversed premixed liquid can be obtained. Through the reverse technique, a uniform and stable aqueous UV-curable epoxy acrylate premixed liquid can be obtained, laying a good foundation for subsequent coating preparation.
[0026] Specifically, the process of using a preset high-speed disperser to reverse the premixed liquid to obtain a uniformly reversed premixed liquid includes: Defining the disperser parameters of the high-speed disperser; Dispersing the premixed liquid according to the disperser parameters to obtain a dispersed premixed liquid; Integrating a preset emulsifier into the dispersed premixed liquid to obtain an emulsified premixed liquid; Determining the inversion point of the emulsified premixed liquid; Reversing the emulsified premixed liquid according to the inversion point to obtain a reversed premixed liquid; Removing the undispersed particles in the reversed premixed liquid to obtain the uniformly reversed premixed liquid.
[0027] Among them, the disperser parameters refer to the technical parameters that need to be set or adjusted during the operation of the high-speed disperser, including parameters such as rotation speed, dispersion time, temperature, etc. The dispersed premixed liquid refers to the premixed liquid processed by the high-speed disperser, in which the solid particles have been preliminarily dispersed to form a uniform mixture. The emulsified premixed liquid refers to the mixture obtained by adding a preset emulsifier to the dispersed premixed liquid and further processing it by the high-speed disperser. The inversion point refers to the specific moment when the emulsified premixed liquid changes from the water-in-oil (W / O) type to the oil-in-water (O / W) type during the high-speed dispersion process. The reversed premixed liquid refers to the premixed liquid that has been processed through the reverse process. The uniformly reversed premixed liquid refers to the final uniform mixture obtained after the reverse process and removing the undispersed particles.
[0028] Further, determining the inversion point of the emulsified premix includes: Determining the oil phase and water phase of the premix of the emulsified premix; Respectively determining the volume of the oil phase of the premix, the viscosity of the oil phase of the premix, the volume of the water phase of the premix, and the viscosity of the water phase of the premix; Based on the volume of the oil phase of the premix, the viscosity of the oil phase of the premix, the volume of the water phase of the premix, and the viscosity of the water phase of the premix, calculate the inversion point of the emulsified premix by using the following formula: Wherein, represents the inversion point of the emulsified premix, represents the volume of the oil phase of the premix, represents the volume of the water phase of the premix, represents the viscosity of the water phase of the premix, represents the viscosity of the oil phase of the premix.
[0029] Wherein, the oil phase of the premix refers to the oil components that will ultimately be dispersed into the water phase to form an emulsion during the emulsification process, the water phase of the premix refers to the phase containing water and other water-soluble components during the emulsification process, the volume of the oil phase of the premix refers to the volume occupied by the oil phase of the premix during the emulsification process, the viscosity of the oil phase of the premix refers to the viscosity of the oil phase of the premix, the volume of the water phase of the premix refers to the volume occupied by the water phase of the premix during the emulsification process, and the viscosity of the water phase of the premix refers to the viscosity of the water phase of the premix.
[0030] Wherein, represents the volume ratio of the oil phase of the premix and the water phase of the premix, reflecting the relative content of the oil phase of the premix and the water phase of the premix, represents the viscosity ratio of the viscosity of the oil phase of the premix and the viscosity of the water phase of the premix, and the viscosity ratio affects the stability of the emulsified premix.
[0031] S2. Integrate the inverted homogeneous premix into a preset microreactor, and configure the esterification reaction parameters of the microreactor. Wherein, the esterification reaction parameters include: the esterification reaction temperature and the esterification reaction flow rate. Based on the esterification reaction parameters, perform the esterification reaction of the inverted homogeneous premix in the microreactor to obtain an esterification reactant.
[0032] It should be explained that the esterification reaction temperature refers to the set temperature of the esterification reaction carried out in the microreactor, and the esterification reaction flow rate refers to the flow rate of the inverted homogeneous premix in the microreactor.
[0033] Based on the esterification reaction parameters, the present invention performs the esterification reaction of the inverted homogeneous premix in the microreactor to obtain an esterification reactant, which can improve the esterification reaction effect.
[0034] Specifically, based on the esterification reaction parameters, the esterification reaction of the reverse homogeneous premixed liquid in the microreactor is carried out to obtain esterification reactants, including: Analyze the characteristics of the premixed liquid of the reverse homogeneous premixed liquid; Determine the channel parameters of the microreactor; According to the characteristics of the premixed liquid and the channel parameters, construct the channel geometry design of the microreactor; Calculate the mixing efficiency of the reverse homogeneous premixed liquid in the channel geometry design; When the mixing efficiency meets the preset mixing threshold, based on the channel geometry design, integrate the reverse homogeneous premixed liquid into the microreactor, and carry out the esterification reaction of the reverse homogeneous premixed liquid in the microreactor through the esterification reaction parameters to obtain esterification reactants.
[0035] Among them, the characteristics of the premixed liquid refer to the characteristics of the reverse homogeneous premixed liquid in chemical and physical properties, including parameters such as viscosity, density, surface tension, etc. The channel parameters refer to the design parameters of the microreactor channel, such as channel diameter, channel length, etc. The channel geometry design refers to the specific layout and structural design of the internal channel of the microreactor. The mixing efficiency refers to the effective mixing of the reverse homogeneous premixed liquid in the channel geometry design. The esterification reactants refer to the products obtained by the esterification reaction of the reverse homogeneous premixed liquid in the microreactor through a catalyst.
[0036] Optionally, the construction of the channel geometry design of the microreactor according to the characteristics of the premixed liquid and the channel parameters can be obtained through 3Dmax software modeling analysis.
[0037] S3. Analyze the viscosity coefficient and pH value of the esterification reactants, optimize the esterification reaction parameters according to the viscosity coefficient and pH value to obtain optimized esterification reaction parameters, and determine the finally formed epoxy acrylate of the esterification reactants based on the optimized esterification reaction parameters.
[0038] The analysis of the viscosity coefficient and pH value of the esterification reactants in the present invention can accurately measure the viscosity coefficient and pH value of the esterification reactants, providing basic data for subsequent analysis and research.
[0039] Specifically, the analysis of the viscosity coefficient and pH value of the esterification reactants includes: Filter the esterification reactants to obtain filtered esterification reactants; Determine the rotational viscometer and pH electrode of the filtered esterification reactants; Based on the rotational viscometer, determine the viscosity coefficient of the filtered esterification reactants; Calibrate the pH electrode to obtain a calibrated pH electrode; Analyze the electrode response characteristics of the calibrated pH electrode; Determine the pH calibration curve of the esterification reactant based on the calibrated pH electrode and the electrode response characteristics; Combine the electrode response characteristics and the pH calibration curve to determine the pH value of the esterification reactant.
[0040] Among them, the filtered esterification reactant refers to the clear esterification reactant obtained by removing solid impurities or insoluble substances through a filtration operation. The rotational viscometer refers to an instrument for measuring the viscosity of a fluid. The pH electrode refers to a sensor for measuring the pH value of a solution, usually including a glass electrode and a reference electrode. The viscosity coefficient refers to a physical quantity describing the flow resistance of a fluid. The calibrated pH electrode refers to a pH electrode that has been calibrated with a standard buffer solution. The electrode response characteristics refer to the potential response of the pH electrode at a specific pH value. The pH calibration curve refers to a curve representing the relationship between the electrode potential and the pH value of the solution. The pH value refers to the numerical value of the acidity or alkalinity of the solution.
[0041] Further, the combining the electrode response characteristics and the pH calibration curve to determine the pH value of the esterification reactant includes: Determine the electrode potential of the esterification reactant according to the electrode response characteristics; Define the equilibrium potential of the esterification reactant based on the pH calibration curve; Based on the electrode potential and the equilibrium potential, calculate the pH value of the esterification reactant using the following formula: Among them, represents the pH value of the esterification reactant, represents the electrode potential, represents the equilibrium potential, represents the gas constant of the esterification reactant, represents the absolute temperature, represents the number of electron transfers, represents the Faraday constant, represents the standard pH value of the esterification reactant.
[0042] Among them, the electrode potential refers to the potential value measured by the pH electrode in the esterification reactant, and the equilibrium potential refers to the reference potential of the pH electrode under standard conditions (usually 25°C and pH value of 7). It is determined by the pH calibration curve and corresponds to the response of the electrode in the standard solution. The gas constant refers to a physical constant with a value of 8.314 J / (mol·K). The absolute temperature refers to the absolute measure of temperature. The number of electron transfers refers to that in pH measurement, usually one electron transfer is involved, so the value of n is 1. The Faraday constant refers to an electrochemical constant with a value of 96485 C / mol, representing the electric charge carried by each mole of electrons. The standard pH value refers to the pH value of the buffer solution used to calibrate the pH electrode under standard conditions (usually 25°C).
[0043] Among them, in the formula the influence of temperature on the electrode potential is considered.
[0044] The present invention optimizes the esterification reaction parameters to obtain optimized esterification reaction parameters. Based on the optimized esterification reaction parameters, the esterification effect of the esterification reactant can be improved. Among them, the optimized esterification reaction parameters refer to the parameters obtained by finely adjusting the conditions of the esterification reaction to improve the reaction efficiency, yield, selectivity or product quality, such as reaction temperature, reaction time, catalyst dosage and other parameters. The epoxy acrylate refers to a compound containing epoxy groups and acrylate groups formed by the final reaction of the esterification reactant.
[0045] S4. Microwave irradiate the epoxy acrylate to obtain irradiated epoxy acrylate, calculate the local heat of the irradiated epoxy acrylate, analyze the neutralizer ratio of the irradiated epoxy acrylate based on the local heat, and hydrophilize the irradiated epoxy acrylate through the neutralizer ratio to obtain an aqueous epoxy acrylate emulsion.
[0046] Microwave irradiating the epoxy acrylate to obtain irradiated epoxy acrylate can further increase the reaction rate and improve the effect of subsequent coating preparation. Among them, the irradiated epoxy acrylate refers to the epoxy acrylate after microwave irradiation treatment. Specifically, the microwave irradiation of the epoxy acrylate can be realized through a microwave reactor. The present invention calculates the local heat of the irradiated epoxy acrylate to provide a data basis for the subsequent hydrophilization.
[0047] Specifically, the calculation of the local heat of the irradiated epoxy acrylate includes:[[]]END]] defining the physical properties of the irradiated epoxy acrylate, among which the physical properties include the mass of epoxy acrylate and the specific heat capacity of epoxy acrylate; Analyze the local temperature change of the radiation epoxy acrylate based on the physical properties; Analyze the local heat of the radiation epoxy acrylate through the local temperature change, the mass of the epoxy acrylate, and the specific heat capacity of the epoxy acrylate.
[0048] Wherein, the mass of the epoxy acrylate refers to the total mass of the epoxy acrylate in the sample, the specific heat capacity of the epoxy acrylate refers to the heat required for a unit mass of the substance to increase the temperature by 1 degree Celsius, the local temperature change refers to the temperature change in a specific area of the epoxy acrylate during microwave radiation, and the local heat refers to the heat absorbed or released by a specific area of the epoxy acrylate during microwave radiation.
[0049] The present invention analyzes the neutralizer ratio of the radiation epoxy acrylate to optimize the entire chemical reaction process.
[0050] Specifically, the analysis of the neutralizer ratio of the radiation epoxy acrylate based on the local heat includes: Analyze the neutralization reaction equation of the radiation epoxy acrylate; Establish a neutralizer ratio model of the radiation epoxy acrylate according to the neutralization reaction equation; According to the local heat, use the neutralizer ratio model to analyze the neutralization reaction state of the radiation epoxy acrylate under different neutralizer ratios; Based on the neutralization reaction state, determine the neutralizer ratio of the radiation epoxy acrylate.
[0051] Wherein, the neutralization reaction equation describes the chemical change equation of the reaction between an acid and a base to form a salt and water. For example, for the neutralization reaction of epoxy acrylate, the neutralization reaction equation may be as follows: epoxy acrylate + neutralizer → salt + water. The neutralizer ratio model refers to a model based on the neutralization reaction equation and experimental data used to predict the reaction results under different neutralizer ratios. The neutralization reaction state refers to the change of the concentration, temperature, pH value, etc. of the reactants and products over time during the neutralization reaction. The neutralizer ratio refers to the molar ratio of the neutralizer to the epoxy acrylate. The neutralizer refers to a substance that can undergo a neutralization reaction with acidic or basic substances, such as hydrochloric acid (HCl), sodium hydroxide (NaOH), etc.
[0052] It should be explained that the aqueous epoxy acrylate emulsion refers to an emulsion obtained by mixing epoxy acrylate and a neutralizer in a certain proportion, so that the originally water-insoluble epoxy acrylate is transformed into an emulsion that can be stably dispersed in water. Specifically, the water-based modification of the radiation epoxy acrylate by adjusting the neutralizer ratio can improve the stability of the later coating.
[0053] S5. Perform UV curing on the waterborne epoxy acrylate emulsion to obtain a cured coating, calculate the adhesion of the cured coating, and when the adhesion meets the preset adhesion threshold, use the cured coating as the target cured coating.
[0054] In the present invention, performing UV curing on the waterborne epoxy acrylate emulsion to obtain a cured coating can result in a uniform, firm and cured coating with excellent properties.
[0055] Specifically, performing UV curing on the waterborne epoxy acrylate emulsion to obtain a cured coating includes: Construct a UV-cured liquid coating of the waterborne epoxy acrylate emulsion through a preset UV curing agent; Perform pre-drying on the UV-cured liquid coating to obtain a pre-dried UV-cured liquid coating; Construct a UV curing environment for the pre-dried UV-cured liquid coating; Based on the UV curing environment, perform curing of the UV-cured liquid coating to obtain a coating curing state; According to the coating curing state, analyze the coating thickness of the initial cured coating, and according to the coating thickness, define a power adaptation function of the UV lamp tube corresponding to the UV curing environment; Through the power adaptation function, continuously cure the UV-cured liquid coating to obtain the cured coating.
[0056] Wherein, the UV curing agent refers to a compound that can initiate a chemical reaction under ultraviolet light irradiation, usually a photoinitiator. The UV-cured liquid coating refers to a liquid coating layer formed by mixing a waterborne epoxy acrylate emulsion and a UV curing agent. The pre-dried UV-cured liquid coating refers to a UV-cured liquid coating that has undergone preliminary drying treatment, aiming to remove solvents or moisture in the coating to facilitate the subsequent UV curing process. The UV curing environment refers to the environment set for the UV curing process, including UV lamp tubes, reflectors, cooling systems, conveyor belts, etc. The coating curing state refers to the state in which the UV-cured liquid coating is cured. The coating thickness refers to the thickness generated when the UV-cured liquid coating is cured. The power adaptation function refers to a function used to automatically adjust the power of the UV lamp tube according to the thickness of the coating. The cured coating refers to the final coating after UV curing, which has changed from a liquid state to a solid state.
[0057] Optionally, defining the power adaptation function of the UV lamp tube corresponding to the UV curing environment according to the coating thickness can analyze the relationship between the coating thickness and the UV lamp tube power through a proportional-integral-derivative (PID) control algorithm and adjust the power output accordingly.
[0058] Finally, the present invention calculates the adhesion of the cured coating. When the adhesion meets the preset adhesion threshold, taking the cured coating as the target cured coating can ensure that the quality of the cured coating meets specific application standards, thereby guaranteeing the reliability and performance of the product. Among them, the adhesion refers to an index used to describe the bonding strength between the coating and the substrate, the adhesion threshold refers to the adhesion standard value used as a benchmark for judging whether the coating has sufficient bonding strength, and the target cured coating refers to the cured coating whose adhesion meets or exceeds the preset adhesion threshold after UV curing.
[0059] First, by precisely analyzing the premixing ratio of epoxy resin, acrylic acid, and photoinitiator and performing inversion using a high-speed disperser, a uniform premixed solution was prepared. This step significantly improved the mixing uniformity of the reactants, laying a foundation for the smooth progress of the subsequent esterification reaction. The uniformity of the premixed solution ensured the quality and performance consistency of the final product. The inverted and uniform premixed solution was integrated into a microreactor, and optimized esterification reaction parameters, including appropriate esterification reaction temperature and flow rate, were configured, effectively improving the efficiency and selectivity of the esterification reaction. The microreactor technology not only accelerated the reaction rate but also reduced the generation of by-products, thereby enhancing the purity and performance of epoxy acrylate. By analyzing the viscosity coefficient and pH value of the esterification reactants, the esterification reaction parameters were optimized, further ensuring that the molecular weight and molecular structure of epoxy acrylate met the expectations, which was crucial for the final performance of the coating. The application of microwave radiation technology and the calculation of the local heat of the irradiated epoxy acrylate could precisely control the reaction temperature, accelerate the reaction rate, and maintain the stability of the product quality. By analyzing the neutralizer ratio and implementing water-based treatment, a stable water-based epoxy acrylate emulsion was successfully prepared. The emulsion had good dispersibility and storage stability. Finally, through UV curing technology, a cured coating with excellent adhesion was obtained. When the adhesion of the coating met the preset adhesion threshold, the target cured coating was established. This cured coating not only had good mechanical properties such as abrasion resistance and chemical resistance but also had the characteristics of rapid curing, greatly shortening the production cycle and improving the production efficiency. Therefore, the present invention can improve the performance of the cured epoxy acrylate coating.
Claims
1. A method for rapidly preparing a waterborne UV-curable epoxy acrylate coating, characterized in that: The method comprises: Analyzing the premixing ratio of epoxy resin, acrylic acid and photoinitiator, premixing the epoxy resin, acrylic acid and photoinitiator based on the premixing ratio to obtain a premixed liquid, and performing phase inversion on the premixed liquid using a preset high-speed disperser to obtain an inverted uniform premixed liquid; Integrating the inverted uniform premixed liquid into a preset microreactor, and configuring the esterification reaction parameters of the microreactor, wherein the esterification reaction parameters include: esterification reaction temperature and esterification reaction flow rate, and performing the esterification reaction of the inverted uniform premixed liquid in the microreactor based on the esterification reaction parameters to obtain an esterification reactant; Analyzing the viscosity coefficient and pH value of the esterification reactant, optimizing the esterification reaction parameters according to the viscosity coefficient and pH value to obtain optimized esterification reaction parameters, and determining the epoxy acrylate finally generated by the esterification reactant based on the optimized esterification reaction parameters; The epoxy acrylate is subjected to microwave radiation to obtain irradiated epoxy acrylate, local heat of the irradiated epoxy acrylate is calculated, a neutralizer ratio of the irradiated epoxy acrylate is analyzed based on the local heat, and the irradiated epoxy acrylate is water-based according to the neutralizer ratio to obtain a water-based epoxy acrylate emulsion; The waterborne epoxy acrylate emulsion is UV cured to obtain a cured coating, and the adhesion of the cured coating is calculated. When the adhesion meets a preset adhesion threshold, the cured coating is used as a target cured coating.
2. The method for rapidly preparing a water-based UV-curable epoxy acrylate coating according to claim 1, wherein: The analysis of the premix ratio of epoxy resin, acrylic acid and photoinitiator includes: defining an experimental matrix of the epoxy resin, acrylic acid, and photoinitiator; Based on the experimental matrix, constructing a mixing ratio group of the epoxy resin, acrylic acid and photoinitiator; collecting mixing data of the mixing ratio group; Based on the mixing data, establishing a ratio analysis model of the mixing ratio group; According to the proportion analysis model, the premixing ratio of the epoxy resin, acrylic acid and photoinitiator is determined.
3. The rapid preparation method of water-based UV curing epoxy acrylate coating according to claim 2, characterized in that: The method of using a preset high-speed disperser to phase-invert the premixed liquid to obtain an inverted uniform premixed liquid comprises: Defining disperser parameters of the high-speed disperser; Dispersing the premixed liquid according to the disperser parameters to obtain a dispersed premixed liquid; Integrating a preset emulsifier into the dispersed premixed liquid to obtain an emulsified premixed liquid; Determining a phase inversion point of the emulsified premix; According to the phase inversion point, the emulsified premix is phase inverted to obtain an inverted premix; The undispersed particles of the inversion premix are removed to obtain the inversion uniform premix.
4. The method for rapidly preparing a water-based UV-curable epoxy acrylate coating according to claim 3, wherein: Determining the phase turning point of the emulsified premix comprises: Determining a premixed liquid oil phase and a premixed liquid water phase of the emulsified premixed liquid; Determining the premix oil phase volume, premix oil phase viscosity, premix water phase volume and premix water phase viscosity of the premix oil phase and the premix water phase, respectively; Based on the volume of the premixed liquid oil phase, the viscosity of the premixed liquid oil phase, the volume of the premixed liquid water phase and the viscosity of the premixed liquid water phase, the phase inversion point of the emulsified premixed liquid is calculated using the following formula: in, Indicates the phase inversion point of the emulsified premix. represents the volume of the oil phase of the premix, represents the volume of the aqueous phase of the premix, Indicates the viscosity of the aqueous phase of the premix, Indicates the viscosity of the oil phase of the premix.
5. The method for rapidly preparing a water-based UV-curable epoxy acrylate coating according to claim 4, wherein: The method of performing an esterification reaction of the inverted uniform premixed liquid in the microreactor based on the esterification reaction parameters to obtain an esterification reactant comprises: Analyzing the premix characteristics of the inverted uniform premix; Determining channel parameters of the microreactor; Constructing a channel geometry design of the microreactor according to the characteristics of the premixed liquid and the channel parameters; Calculating the mixing efficiency of the inverted uniform premixed liquid in the channel geometry design; When the mixing efficiency meets the preset mixing threshold, based on the channel geometry design, the inverted uniform premixed liquid is integrated into the microreactor, and the esterification reaction of the inverted uniform premixed liquid in the microreactor is performed according to the esterification reaction parameters to obtain the esterification reactant.
6. The rapid preparation method of water-based UV curing epoxy acrylate coating according to claim 5, characterized in that: The analyzing the viscosity coefficient and pH value of the esterification reactant comprises: filtering the esterification reaction product to obtain a filtered esterification reaction product; Determine the rotational viscometer and pH electrode of the filtered esterification reaction product; Determining the viscosity coefficient of the filtered esterification reaction product based on the rotational viscometer; Calibrate the pH electrode to obtain a calibrated pH electrode; Analyzing the electrode response characteristics of the calibrated pH electrode; Determining a pH calibration curve of the esterification reactant according to the calibration pH electrode and the electrode response characteristics; The pH value of the esterification reactant is determined by combining the electrode response characteristics and the pH calibration curve.
7. The method for rapidly preparing a water-based UV-curable epoxy acrylate coating according to claim 6, wherein: The step of combining the electrode response characteristics with the pH calibration curve to determine the pH value of the esterification reactant comprises: Determining the electrode potential of the esterification reactant according to the electrode response characteristics; Based on the pH calibration curve, defining the equilibrium potential of the esterification reactant; Based on the electrode potential and the equilibrium potential, the pH value of the esterification reactant is calculated using the following formula: in, Indicates the pH value of the esterification reaction. represents the electrode potential, represents the equilibrium potential, represents the gas constant of the esterification reactants, represents absolute temperature, represents the number of electron transfers, is the Faraday constant, Indicates the standard pH value of the esterification reaction.
8. The method for rapidly preparing a water-based UV-curable epoxy acrylate coating according to claim 7, wherein: The calculating of the local heat of the radiant epoxy acrylate comprises: Defining the physical properties of the radiated epoxy acrylate, wherein the physical properties include the mass of epoxy acrylate and the specific heat capacity of epoxy acrylate; Based on the physical properties, analyzing the local temperature change of the irradiated epoxy acrylate; The local heat of the radiated epoxy acrylate is analyzed by the local temperature change, the epoxy acrylate mass and the epoxy acrylate specific heat capacity.
9. The method for rapidly preparing a water-based UV-curable epoxy acrylate coating according to claim 8, wherein: The neutralizing agent ratio of the radiation epoxy acrylate is analyzed based on the local heat, comprising: Analyzing the neutralization reaction equation of the radiation epoxy acrylate; According to the neutralization reaction equation, a neutralizer ratio model of the radiation epoxy acrylate is established; According to the local heat, using the neutralizer ratio model to analyze the neutralization reaction state of the radiation epoxy acrylate at different neutralizer ratios; Based on the neutralization reaction state, the neutralizing agent ratio of the radiation epoxy acrylate is determined.
10. The method for rapidly preparing a waterborne UV curing epoxy acrylate coating according to claim 9, characterized in that: The step of UV curing the waterborne epoxy acrylate emulsion to obtain a cured coating comprises: Constructing a UV-curable liquid coating of the waterborne epoxy acrylate emulsion by using a preset UV curing agent; Pre-drying the UV-curable liquid coating to obtain a pre-dried UV-curable liquid coating; Constructing a UV curing environment for the pre-dried UV curing liquid coating; Based on the UV curing environment, curing of the UV curing liquid coating is performed to obtain a curing state of the coating; Analyzing the coating thickness of the initial cured coating according to the coating curing state, and defining a power adaptive function of the UV lamp corresponding to the UV curing environment according to the coating thickness; The UV curable liquid coating is continuously cured by the power adaptive function to obtain the cured coating.