Water dispersion type emulsion of crylic acid, preparation method and usage
An acrylic emulsion and dispersion technology, which is applied in textiles and papermaking, chemical instruments and methods, anion exchange, etc., can solve the problems of large amount of organic solvent usage and poor solvent resistance of resin, and achieve low cost, not easy to deform, and easy to promote Effect
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Embodiment 1
[0037] First, mix 100 parts of acrylic monomer with 195 parts of butyl acrylate, 97 parts of methyl methacrylate, and 14 parts of vinyl acetate, and mix 1 / 3 of the total amount of the mixed monomer with 120 parts Ionized water, stirred for 50-60min for pre-emulsification. Adjust the pH to about 4-6 with sodium bicarbonate. Raise the temperature to 78°C, add 0.3 parts of ammonium persulfate to initiate the reaction, keep stirring for 50 minutes, and react until the product shows blue light and no monomer refluxes. Add the remaining mixed monomers and 200 parts of deionized water in batches in the reactor, and control the dropping rate within 1-2 hours. When the reaction temperature rises to 78°C, add 1 part of initiator ammonium persulfate and adjust it at any time. The pH is about 7.5 and the temperature is kept at 72°C, and the stirring speed is 80-100r / min.
[0038] Finally, add 0.05 part of initiator to kill residual monomer, cool down and discharge.
[0039] An emulsion...
Embodiment 2
[0041] Mix 100 parts of acrylic monomers, 270 parts of butyl acrylate, 100 parts of methyl methacrylate, 4 parts of acrylonitrile, and 20 parts of vinyl acetate monomers, and mix 1 / 3 of the total amount of monomers with 170 parts Parts of deionized water, stirred for 60min for pre-emulsification.
[0042] Adjust the pH to about 4-6 with sodium bicarbonate. When the temperature was raised to 81°C, 0.7 parts of potassium persulfate was added to initiate the reaction, and kept stirring for 70 minutes until there was no monomer reflux in the reaction, and the product showed blue light at this time. Add the remaining mixed monomers and 380 parts of deionized water in batches to the reaction kettle, control the dropping speed within 1-2 hours, and add 1.5 parts of initiator at the same time when the reaction temperature rises to 80°C, adjust the pH to about 7 at any time, and keep it warm 76°C, the stirring speed is 80r / min.
[0043] Finally, add 0.08 initiator to kill residual mo...
Embodiment 3
[0046] First, mix 100 parts of acrylic monomer with 300 parts of butyl acrylate, 140 parts of methyl methacrylate, 9 parts of acrylonitrile, and 19 parts of vinyl acetate, and take 1 / 3 of the total amount of the mixed monomer to mix with 200 parts of deionized water, stirred for 60 minutes for pre-emulsification.
[0047] Adjust the pH to about 4-6 with sodium bicarbonate. Raise the temperature to 80°C and add 0.5 parts of ammonium persulfate to initiate the reaction, and keep stirring for 70 minutes until there is no monomer reflux, and the product shows blue light. Add the remaining 2 / 3 mixed monomer and 400 parts of water in batches at the same time in the reaction kettle, control the dropping speed within 1-2 hours, add 2 parts of the initiator while the reaction temperature rises to 80 °C, and oxidize with hydrogen Adjust the pH to 8.5 with sodium at any time, keep warm at 80°C, and stir at a speed of 90r / min.
[0048] Finally, 0.05 part of initiator is added to kill re...
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