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CN-121991608-A - High-temperature-resistant white latex material and preparation method thereof

CN121991608ACN 121991608 ACN121991608 ACN 121991608ACN-121991608-A

Abstract

The invention discloses a high-temperature-resistant white latex material and a preparation method thereof, and belongs to the technical field of high polymer materials. The high-temperature-resistant white latex material is prepared by uniformly mixing modified polyvinyl acetate emulsion, a flame retardant, modified sepiolite, modified basalt fiber, zinc oxide, castor oil, ammonium persulfate and deionized water, performing ultrasonic dispersion for 15-20min, stirring for 20-30min at 60-80 ℃, preserving heat, and discharging. The N-methylol acrylamide can greatly improve the creep resistance and the thermal strength at high temperature by virtue of covalent bond crosslinking, the synergistic effect of the N-methylol acrylamide and the N-methylol acrylamide can obviously enhance the high temperature resistance of the white latex material, the triazine ring in the flame retardant has higher thermal stability, the imine bond and the adjacent benzene ring can form a conjugated system to enhance the high temperature resistance of the white latex material, and the sepiolite and basalt fiber form a stable three-dimensional network by virtue of the coupling agent and the modified polyvinyl acetate emulsion, so that the high temperature resistance of the white latex material is further improved.

Inventors

  • HE JUNCHENG
  • HE JUNFU

Assignees

  • 山东双俊机械设备制造有限公司

Dates

Publication Date
20260508
Application Date
20260228

Claims (10)

  1. 1. The preparation method of the high-temperature-resistant white latex material is characterized by comprising the following steps of: (1) Preparing modified polyvinyl acetate emulsion; (2) Preparing a flame retardant; (3) Uniformly mixing modified polyvinyl acetate emulsion, a flame retardant, modified sepiolite, modified basalt fiber, zinc oxide, castor oil, ammonium persulfate and deionized water, performing ultrasonic dispersion for 15-20min, stirring for 20-30min at 60-80 ℃, preserving heat, and discharging to obtain the high-temperature-resistant white latex material.
  2. 2. The method for preparing the high temperature resistant white latex material according to claim 1, wherein the preparation method of the modified polyvinyl acetate emulsion in the step (1) is characterized in that 4.3-4.4g of polyvinyl alcohol and 48-50g of deionized water are added into a reactor, stirred and dissolved for 1-2 hours at 90-95 ℃, then cooled to 60-65 ℃, 0.6-0.7g of surfactant, 3.5-3.6g of vinyl acetate, 0.04-0.05g of ammonium persulfate and 0.15-0.18g of sodium acetate are added into the reactor, uniformly mixed, heated to 80-90 ℃, after reflux is stopped, the main reaction materials are dripped at the same time, the reaction temperature is kept at 76-80 ℃, the temperature is kept for 1-1.5 hours after dripping, 0.12-0.15g of sodium acetate is added into the reactor for regulating the pH to be neutral, and then the modified polyvinyl acetate emulsion is obtained after discharging.
  3. 3. The method for preparing a high temperature resistant white latex material according to claim 1, wherein the method for preparing a flame retardant in the step (2) comprises the following steps: S1, adding vanillin and anhydrous sodium carbonate into an acetone solvent, stirring and mixing, then adding cyanuric chloride, reacting for 6-10h at 80-100 ℃, cooling to room temperature after the reaction is finished, filtering, washing, and drying for 22-26h in a 50-60 ℃ oven to obtain an intermediate 1; s2, adding the intermediate 1, 1- (3-aminopropyl) imidazole into the N, N-dimethylformamide solvent under the protection of nitrogen gas, uniformly stirring, reacting for 5-8 hours at 50-60 ℃, filtering, washing, drying and purifying after the reaction is finished, thus obtaining the flame retardant.
  4. 4. The method for preparing the high temperature resistant white latex material according to claim 1, wherein the preparation method of the modified sepiolite in the step (3) is characterized in that 20-25mL of deionized water, 30-35mL of absolute ethyl alcohol and 5.02-5.06g of sepiolite are added into a reactor, ultrasonic treatment is carried out for 10-15min, then 2.13-2.17g of gamma-aminopropyl triethoxysilane is dropwise added into the sepiolite, the reaction is carried out for 4-6h at 75-85 ℃, and after the reaction is finished, the sepiolite is obtained by washing and drying.
  5. 5. The method for preparing the high temperature resistant white latex material according to claim 1, wherein the preparation method of the modified basalt fiber in the step (3) is characterized in that 2.34-2.38g of basalt fiber is firstly placed in 28-30mL of acetone solution for ultrasonic washing for 10-15min, then 20-25mL of deionized water, 30-35mL of absolute ethyl alcohol and the basalt fiber after ultrasonic washing are added into a reactor, 1.12-1.16g of gamma-aminopropyl triethoxysilane is dropwise added into the basalt fiber, the reaction is carried out for 8-12h at 35-45 ℃, washing is carried out after the reaction is finished, and drying is carried out in a 110-120 ℃ oven for 1-2h, thus obtaining the modified basalt fiber.
  6. 6. The method for preparing the high temperature resistant white latex material according to claim 2, wherein the main reaction materials comprise two parts, the first part is a mixed monomer obtained by uniformly mixing 8-10g of vinyl acetate, 0.1-0.15g of diallyl phthalate and 0.3-0.5g of vinyltrimethoxysilane, and the second part is an aqueous solution obtained by dissolving 0.08-0.1g of ammonium persulfate and 0.6-0.8g of N-methylolacrylamide in 5-6g of deionized water.
  7. 7. The method for preparing the high temperature resistant white latex material according to claim 3, wherein the dosage ratio of the acetone, the vanillin, the anhydrous sodium carbonate and the cyanuric chloride in the S1 is 40-50mL:10.64-10.68g:7.62-7.66g:3.68-3.72g.
  8. 8. The method for preparing the high temperature resistant white latex material according to claim 3, wherein the dosage ratio of N, N-dimethylformamide, intermediate 1 and 1- (3-aminopropyl) imidazole in S2 is 35-45mL:5.32-5.36g:3.75-3.8g.
  9. 9. The preparation method of the high temperature resistant white latex material according to claim 1, wherein the components in the step (3) comprise, by weight, 40-50 parts of modified polyvinyl acetate emulsion, 3-5 parts of flame retardant, 2-3 parts of modified sepiolite, 1-2 parts of modified basalt fiber, 0.5-0.8 part of zinc oxide, 1-1.5 parts of castor oil, 0.3-0.5 part of ammonium persulfate and 10-12 parts of deionized water.
  10. 10. A high temperature resistant white latex material, characterized in that it is prepared by the preparation method according to any one of claims 1-9.

Description

High-temperature-resistant white latex material and preparation method thereof Technical Field The invention belongs to the technical field of high polymer materials, and particularly relates to a high-temperature-resistant white latex material and a preparation method thereof. Background The white latex is widely applied to the fields of wood processing, architectural decoration, artwork manufacturing and the like by virtue of the characteristics of innocuity, good initial adhesion, convenient use and the like, but the adhesive layer of the traditional white latex is easy to soften in the high-temperature environment in summer or around a specific heating device, so that the problems of adhesive joint failure, degumming and the like occur, the application of the white latex in occasions needing certain heat resistance is severely limited, and therefore, how to avoid the phenomenon is the key for solving the problem, and the development of the white latex material with the characteristics of simple process, stable storage and obvious high temperature resistance becomes an important subject. The bio-based modified construction white emulsion has excellent film forming performance, strong bonding strength and wide application range, but the high temperature resistance is to be improved. Disclosure of Invention Technical problem to be solved Aiming at the defects of the prior art, the invention provides a high-temperature-resistant white latex material and a preparation method thereof. Technical proposal In order to solve the problems, the technical scheme adopted by the invention is as follows: The invention relates to a preparation method of a high-temperature-resistant white latex material, which comprises the following steps: (1) Preparing modified polyvinyl acetate emulsion; (2) Preparing a flame retardant; (3) Uniformly mixing modified polyvinyl acetate emulsion, a flame retardant, modified sepiolite, modified basalt fiber, zinc oxide, castor oil, ammonium persulfate and deionized water, performing ultrasonic dispersion for 15-20min, stirring for 20-30min at 60-80 ℃, preserving heat, and discharging to obtain the high-temperature-resistant white latex material. Further, the preparation method of the modified polyvinyl acetate emulsion in the step (1) comprises the steps of adding 4.3-4.4g of polyvinyl alcohol and 48-50g of deionized water into a reactor, stirring and dissolving for 1-2h at 90-95 ℃, then cooling to 60-65 ℃, adding 0.6-0.7g of surfactant, 3.5-3.6g of vinyl acetate, 0.04-0.05g of ammonium persulfate and 0.15-0.18g of sodium acetate into the reactor, uniformly mixing, heating to 80-90 ℃, after stopping reflux, starting to dropwise add main reaction materials at the same time, keeping the dropwise adding time at 4-4.5h, keeping the reaction temperature at 76-80 ℃, keeping the temperature for 1-1.5h after the dropwise adding, cooling, adding 0.12-0.15g of sodium acetate to adjust the pH to be neutral, and discharging to obtain the modified polyvinyl acetate emulsion. Further, the preparation method of the flame retardant in the step (2) comprises the following steps: S1, adding vanillin and anhydrous sodium carbonate into an acetone solvent, stirring and mixing, then adding cyanuric chloride, reacting for 6-10h at 80-100 ℃, cooling to room temperature after the reaction is finished, filtering, washing, and drying for 22-26h in a 50-60 ℃ oven to obtain an intermediate 1; s2, adding the intermediate 1, 1- (3-aminopropyl) imidazole into the N, N-dimethylformamide solvent under the protection of nitrogen gas, uniformly stirring, reacting for 5-8 hours at 50-60 ℃, filtering, washing, drying and purifying after the reaction is finished, thus obtaining the flame retardant. Further, the preparation method of the modified sepiolite in the step (3) comprises the steps of adding 20-25mL of deionized water, 30-35mL of absolute ethyl alcohol and 5.02-5.06g of sepiolite into a reactor, carrying out ultrasonic treatment for 10-15min, then dropwise adding 2.13-2.17g of gamma-aminopropyl triethoxysilane into the reactor, reacting for 4-6h at 75-85 ℃, and washing and drying after the reaction is finished to obtain the modified sepiolite. Further, the preparation method of the modified basalt fiber in the step (3) comprises the steps of firstly placing 2.34-2.38g of basalt fiber in 28-30mL of acetone solution for ultrasonic washing for 10-15min, then adding 20-25mL of deionized water, 30-35mL of absolute ethyl alcohol and the basalt fiber after ultrasonic washing into a reactor, dropwise adding 1.12-1.16g of gamma-aminopropyl triethoxysilane into the basalt fiber, reacting for 8-12h at 35-45 ℃, washing after the reaction is finished, and drying for 1-2h in a 110-120 ℃ oven to obtain the modified basalt fiber. Further, the main reaction materials comprise two parts, wherein the first part is a mixed monomer obtained by uniformly mixing 8-10g of vinyl acetate, 0.1-0.15g of diallyl phthalate and 0.3-0.5g of vinyl t