Low-Tg acrylate emulsion for cement-based building materials, and preparation method thereof
A technology of alkyl methacrylate and acrylate, which is applied in the field of acrylate emulsion for building materials, to achieve the effect of improving compatibility and reducing water-cement ratio
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Embodiment 1
[0043] a. Preparation of nuclear pre-emulsion: Dissolve 1 part of sodium lauryl sulfate, 1 part of alkyol polyether, and 3 parts of sodium methacrylamide isopropyl sulfonate in 105 parts of deionized water, stir well, Add mixed monomer I: 100 parts of methyl methacrylate, 12 parts of styrene, 194 parts of butyl acrylate, and 3 parts of methacrylic acid, and stir for 10 to 40 minutes to obtain the core pre-emulsion;
[0044] Preparation of nuclear initiator solution: Add 1.2 parts of ammonium persulfate and 1.2 parts of sodium bicarbonate into 53 parts of deionized water, stir to dissolve, and obtain the nuclear initiator solution;
[0045] b. Preparation of shell pre-emulsion: Dissolve 0.06 parts of sodium lauryl sulfate, 0.06 parts of alkyl alcohol polyether, and 0.17 parts of sodium methacrylamide isopropyl sulfonate in 11 parts of deionized water, stir well, Add mixed monomer II: 6 parts of methyl methacrylate, 2 parts of styrene, 8 parts of butyl acrylate, 0.4 part of meth...
Embodiment 2
[0056] a. Preparation of nuclear pre-emulsion: Dissolve 1.3 parts of sodium lauryl sulfate, 1.3 parts of alkyol polyether, and 2.4 parts of sodium methacrylamide isopropyl sulfonate in 105 parts of deionized water, and stir evenly. Add mixed monomer I: 70 parts of methyl methacrylate, 42 parts of styrene, 194 parts of butyl acrylate, 2.6 parts of methacrylic acid, and stir for 10 to 40 minutes to obtain the core pre-emulsion;
[0057] Preparation of nuclear initiator solution: add 1.4 parts of ammonium persulfate and 1.4 parts of sodium bicarbonate to 60 parts of deionized water, stir to dissolve, and obtain the nuclear initiator solution;
[0058] b. Preparation of shell pre-emulsion: Dissolve 0.08 part of sodium lauryl sulfate, 0.08 part of alkanol polyether, and 0.20 part of sodium methacrylamide isopropyl sulfonate in 11 parts of deionized water, and stir evenly. Add mixed monomer II: 3 parts of methyl methacrylate, 5 parts of styrene, 8 parts of butyl acrylate, 0.5 part o...
Embodiment 3
[0069] a. Preparation of nuclear pre-emulsion: 1.5 parts of alkylphenol ether ammonium sulfate, 1.5 parts of alkylphenol polyoxyethylene ether, 1.1 parts of double bond-containing polyether ammonium sulfate, 1.1 parts of allyl alkoxy The base polyether sulfate was dissolved in 105 parts of deionized water, stirred evenly, and mixed monomer I was added: 70 parts of methyl methacrylate, 42 parts of styrene, 194 parts of butyl acrylate, 2.6 parts of methacrylic acid, and stirred for 10 ~40 minutes to get the nuclear pre-emulsion;
[0070] Preparation of nuclear initiator solution: add 1.4 parts of potassium persulfate and 1.4 parts of sodium bicarbonate to 60 parts of deionized water, stir to dissolve, and obtain the nuclear initiator solution;
[0071] b. Preparation of shell pre-emulsion: 0.09 part of alkylphenol ether ammonium sulfate, 0.09 part of alkylphenol polyoxyethylene ether, 0.1 part of double bond-containing polyether ammonium sulfate, 0.1 part of allyl alkoxy The ba...
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