Multifunctional dry-mixed mortar additive and preparation method thereof
A dry-mixed mortar and admixture technology, which is applied in the fields of high molecular polymers and building materials, can solve the problems of product quality fluctuation, difficulty in homogenization of the mixture, and complicated dry-mixed mortar equipment, so as to simplify the production equipment and improve the dispersion performance. Effect
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Embodiment 1
[0016] Step 1: Put 198g of methacrylic acid in the container and place it in a cold water bath, neutralize it with 10% sodium carbonate solution until the pH is close to 7. After the neutralization reaction is completed, add 402g of 2-acrylamide-2-methylpropylsulfonic acid into the container, mix and stir for later use.
[0017] The second step: weigh 100g of carboxymethylcellulose and put it into a reaction vessel with a stirrer, a nitrogen conduit and a thermometer, and add 400g of deionized water. In a constant temperature water bath, pass nitrogen to drive oxygen, heat and stir to completely dissolve carboxymethyl cellulose.
[0018] Step 3: In the dissolved carboxymethyl cellulose solution, add the neutralized mixed solution of methacrylic acid and 2-acrylamide-2-methylpropylsulfonic acid, stir and heat up to 70°C, 1.5 g of initiator ammonium persulfate was added, and the polymerization reaction was stirred for 10 hours while insulated and cooled to room temperature.
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Embodiment 2
[0025] Step 1: Put 118g of methacrylic acid in the container and place it in a cold water bath, neutralize it with 10% sodium carbonate solution until the pH is close to 7. After the neutralization reaction is completed, add 682g of 2-acrylamide-2-methylpropylsulfonic acid into the container, mix and stir for later use.
[0026] The second step: weigh 100g of carboxymethylcellulose and put it into a reaction vessel with a stirrer, a nitrogen conduit and a thermometer, and add 600g of deionized water. In a constant temperature water bath, pass nitrogen to drive oxygen, heat and stir to completely dissolve carboxymethyl cellulose.
[0027] Step 3: Add the neutralized methacrylic acid and 2-acrylamide-2-methylpropylsulfonic acid mixture into the dissolved carboxymethyl cellulose solution, stir and heat up to 75°C, Add 2.0 g of initiator ammonium persulfate, insulate and stir the polymerization reaction for 12 hours, and cool to room temperature.
[0028] Step 4: Add ethanol to ...
Embodiment 3
[0035] The first step: put 104g of methacrylic acid in the container and place it in a cold water bath, neutralize it with 10% sodium carbonate solution until the pH is close to 7. After the neutralization reaction is completed, add 846g of 2-acrylamide-2-methylpropylsulfonic acid into the container, mix and stir for later use.
[0036] Step 2: Weigh 100 g of carboxymethyl cellulose and put it into a reaction vessel with a stirrer, a nitrogen conduit and a thermometer, and add 1000 g of deionized water. In a constant temperature water bath, pass nitrogen to drive oxygen, heat and stir to completely dissolve carboxymethyl cellulose.
[0037] Step 3: Add the neutralized methacrylic acid and 2-acrylamide-2-methylpropylsulfonic acid mixture into the dissolved carboxymethyl cellulose solution, stir and heat up to 75°C, 2.5 g of initiator ammonium persulfate was added, and the polymerization reaction was stirred for 12 hours while insulated and cooled to room temperature.
[0038]...
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