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CN-121517177-B - Indoor moistureproof waterproof gypsum board and preparation method thereof

CN121517177BCN 121517177 BCN121517177 BCN 121517177BCN-121517177-B

Abstract

The invention discloses an indoor dampproof and waterproof gypsum board and a preparation method thereof, belonging to the technical field of gypsum board preparation; the preparation method of the indoor moistureproof and waterproof gypsum board comprises the following steps of S1, uniformly mixing building gypsum, modified fluorogypsum, deionized water, a polyester adhesive, a composite water reducing agent, blast furnace slag powder and the like to obtain gypsum slurry, S2, paving the gypsum slurry on a first layer of facing paper, paving a second layer of facing paper on the gypsum slurry, compacting, final setting, drying and curing to obtain the indoor moistureproof and waterproof gypsum board, wherein the composite water reducing agent is obtained by reacting ethyl vinyl ether, trichloroethylene and allyl trimethoxysilane, and the polyester adhesive is obtained by reacting allyl alcohol, phthalic anhydride and triallyl cyanurate.

Inventors

  • CUI CHUANQING
  • ZHAO CHENGBIN
  • ZHOU BO
  • WANG ZHIPENG
  • WANG HUI
  • WANG TENG

Assignees

  • 阜新泰山石膏建材有限公司

Dates

Publication Date
20260512
Application Date
20260114

Claims (8)

  1. 1. The preparation method of the indoor moistureproof and waterproof gypsum board is characterized by comprising the following steps of: s1, uniformly mixing building gypsum, modified fluorine gypsum, deionized water, a polyester adhesive, calcium dihydrogen phosphate, a composite water reducing agent and blast furnace slag powder to prepare gypsum slurry; S2, spreading gypsum slurry on the first layer of facing paper, spreading a second layer of facing paper on the gypsum slurry, compacting, and final setting to obtain a sample; the preparation method of the composite water reducer comprises the following steps: A1, uniformly mixing ethyl vinyl ether, trichlorofluoroethylene, allyl trimethoxy silane and an initiator IPP to obtain a mixture, heating the mixture to 40-50 ℃, carrying out polymerization reaction at the temperature for 2-4 hours, and collecting a solid polymer; A2, uniformly mixing the methallyl polyoxyethylene ether-2400, the vinylidene fluoride polymer, the 2-acrylamide-2-methylpropanesulfonic acid and the triethoxymethane, stirring and dissolving to form a monomer mixed solution, respectively dripping a potassium persulfate solution and a ferrous sulfate solution into the monomer mixed solution, heating to 70-80 ℃, and reacting for 2-4 hours at the temperature; Continuously dropwise adding a potassium persulfate solution and a ferrous sulfate solution into the three-neck flask, and reacting for 1-2 hours at 50-80 ℃ after the dropwise adding is finished to obtain a product, wherein the pH value of the product is regulated to 7-8 to obtain the compound water reducer; The preparation method of the polyester adhesive comprises the following steps: Adding allyl alcohol into a reaction kettle, heating to 100-105 ℃, continuously adding phthalic anhydride, hydroquinone and p-toluene sulfinic acid into the reaction kettle under the inert gas atmosphere, uniformly mixing to obtain a reactant, heating the reactant to 160-170 ℃, and continuously reacting for 10-12 hours at the temperature to form an esterified substance, wherein the first-stage reaction is finished; And B2, continuously adding triallyl cyanurate into the reaction kettle, dropwise adding a potassium persulfate solution, heating to 180-200 ℃, maintaining the temperature for 3-6h, and discharging while the reaction kettle is hot to obtain the prepared polyester adhesive.
  2. 2. The method for preparing the indoor moistureproof and waterproof gypsum board according to claim 1, wherein in the step S1, the modified fluorogypsum is prepared by the following steps: adding quick lime into the fluorine gypsum solution, stirring uniformly to obtain a fluorine gypsum mixture, adding citric acid into the fluorine gypsum mixture, mixing uniformly, standing, and removing deionized water by rotary evaporation to obtain the modified fluorine gypsum.
  3. 3. The method for preparing the indoor moistureproof and waterproof gypsum board according to claim 2, wherein the concentration of the fluorogypsum solution is 70-80wt%, and the weight ratio of the fluorogypsum solution, the quicklime and the citric acid is 100:0.5-1.2:0.3-0.5.
  4. 4. The method for preparing the indoor moistureproof and waterproof gypsum board according to claim 1, wherein in the step A1, the dosage ratio of ethyl vinyl ether, trichlorofluoroethylene, allyl trimethoxysilane and initiator is 50-100mL:20-30 mL:0.3-0.5g, and the solid-liquid ratio of solid polymer and n-hexane is 1:3.
  5. 5. The method for preparing the indoor moistureproof and waterproof gypsum board according to claim 1, wherein in the step A2, the dosage ratio of methyl allyl polyoxyethylene ether-2400, vinylidene fluoride polymer, 2-acrylamide-2-methylpropanesulfonic acid, triethoxymethane, potassium persulfate solution and ferrous sulfate solution is 100-200mL:20-30g:10-20g:200-300mL:3-5mL, and in the step A3, the dosage ratio of continuously dropwise added potassium persulfate solution and ferrous sulfate solution is 3-5mL:3-5mL.
  6. 6. The method for preparing the indoor moistureproof and waterproof gypsum board according to claim 1, wherein the dosage ratio of allyl alcohol, phthalic anhydride, hydroquinone, p-toluene sulfinic acid, triallyl cyanurate and potassium persulfate solution is 120-240mL:300-500g:1-3g:3-5g:20-30g:5-10mL.
  7. 7. The preparation method of the indoor moistureproof and waterproof gypsum board is characterized in that in the step S1, the weight ratio of building gypsum, modified fluorogypsum, deionized water, polyester adhesive, monocalcium phosphate, composite water reducer and blast furnace slag powder is 60-80:20-30:70-80:5-10:0.25-1:5-10:3-5, and in the step S2, the specific drying and curing steps are that the drying and curing temperature is set to 150-160 ℃ at first, the drying and curing time is 25-35min, the drying is carried out at 105-110 ℃ for 1-1.5h, and the drying is carried out at 45-50 ℃ to constant weight.
  8. 8. A moisture-proof and water-proof gypsum board for indoor use, which is characterized in that the gypsum board is prepared by the preparation method of the moisture-proof and water-proof gypsum board for indoor use according to any one of claims 1 to 7.

Description

Indoor moistureproof waterproof gypsum board and preparation method thereof Technical Field The invention relates to the technical field of gypsum boards, in particular to an indoor moistureproof waterproof gypsum board and a preparation method thereof. Background The gypsum board is a building material made of building gypsum as a main raw material, and is one of the new light boards which are developed in an important way at present. The gypsum board is an important gypsum building material product, has the advantages of low production energy consumption, heat preservation, heat insulation and good fireproof performance, and is an ideal interior wall material. The main raw material of the gypsum board is building gypsum, and fiber, admixture, proper amount of light filler and the like are also added for improving the performance of the gypsum board. Patent application CN114920535A discloses a gypsum board and a preparation method thereof. Mixing desulfurized gypsum, basalt fiber, sepiolite fiber, etc. to obtain a component A, and mixing modified starch, APAO emulsion grafted polymethyl methacrylate, etc. to obtain a component B. And uniformly mixing the component A, the component B and related auxiliary agents to obtain a mixture, and carrying out post-process treatment on the mixture to obtain the prepared gypsum board. Wherein, the desulfurized gypsum, basalt fiber and sepiolite fiber integrally form a composite framework, and the APAO emulsion and modified starch improve the weather resistance and strength of the gypsum board. However, the gypsum board itself has poor moisture resistance and water resistance, and how to improve the water resistance of the gypsum board is still a technical problem to be solved. In addition, along with the accelerated exhaustion of the global natural gypsum resources and lower overall utilization rate of the waste gypsum, the doping of the waste gypsum in the preparation of the gypsum board is also an important means for reducing environmental pollution and improving the utilization rate of the resources. Therefore, the invention provides an indoor moistureproof and waterproof gypsum board and a preparation method thereof, so as to solve the technical problems. Disclosure of Invention The invention aims to provide an indoor moistureproof and waterproof gypsum board and a preparation method thereof, and the prepared gypsum board not only has good moistureproof and waterproof performance, but also has good mechanical properties, prolongs the service life to a certain extent, and ensures the quality. The aim of the invention can be achieved by the following technical scheme: the invention provides an indoor dampproof and waterproof gypsum board and a preparation method thereof, wherein the method comprises the following steps: s1, uniformly mixing building gypsum, modified fluorine gypsum, deionized water, a polyester adhesive, calcium dihydrogen phosphate, a composite water reducing agent and blast furnace slag powder to prepare gypsum slurry; S2, spreading gypsum slurry on the first layer of facing paper, spreading the second layer of facing paper on the gypsum slurry, compacting, final setting to obtain a sample, and drying and solidifying the sample to prepare the indoor moistureproof waterproof gypsum board. Further, in the step S1, the modified fluorogypsum is prepared by the following steps: adding quick lime into the fluorine gypsum solution, stirring uniformly to obtain a fluorine gypsum mixture, adding citric acid into the fluorine gypsum mixture, mixing uniformly, standing, and removing deionized water by rotary evaporation to obtain the modified fluorine gypsum. Further, the concentration of the fluorine gypsum solution is 70-80wt%, and the weight ratio of the fluorine gypsum solution, the quicklime and the citric acid is 100:0.5-1.2:0.3-0.5. Further, the preparation method of the composite water reducer comprises the following steps: A1, uniformly mixing ethyl vinyl ether, trichlorofluoroethylene, allyl trimethoxy silane and an initiator IPP to obtain a mixture, heating the mixture to 40-50 ℃, carrying out polymerization reaction at the temperature for 2-4 hours, and collecting a solid polymer; A2, uniformly mixing the methallyl polyoxyethylene ether-2400, the vinylidene fluoride polymer, the 2-acrylamide-2-methylpropanesulfonic acid and the triethoxymethane, stirring and dissolving to form a monomer mixed solution, respectively dripping a potassium persulfate solution and a ferrous sulfate solution into the monomer mixed solution, heating to 70-80 ℃, and reacting for 2-4 hours at the temperature; And A3, continuously dropwise adding a potassium persulfate solution and a ferrous sulfate solution into the three-neck flask, reacting for 1-2h at 50-80 ℃ after the dropwise adding is finished to obtain a product, and regulating the pH value of the product to 7-8 to obtain the composite water reducer. Further, in the step A1, the dosage ratio of the ethyl vinyl ether