3 lines
4.3 KiB
JSON
3 lines
4.3 KiB
JSON
{
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"protocol": "(1) Synthesis of sulfonate-containing polyacrylate: Mix all acrylic monomers with chain transfer agents to prepare mixture I. Dissolve vinyl sulfonate monomers, initiators, and organic solvents to prepare mixture II. Add 10-30% mixture I and 10‰ mixture II to the reaction vessel, stir and heat to 80-95°C for 30-60 minutes. Gradually add the remaining mixture I and mixture II into the reaction vessel over 4-6 hours. Maintain temperature for 0.5-2 hours, cool down to below 40-70°C, and add a neutralizing agent to obtain sulfonate-containing polyacrylate. (2) Preparation of aqueous dispersion: Add 1-3 times the mass of the obtained sulfonate-containing polyacrylate in water for emulsification until the solid content is 20%, thus obtaining the sulfonate-containing polyacrylate aqueous dispersion.本发明涉及一种聚丙烯酸酯水分散体及其制备方法，特别是含磺酸盐的聚丙烯酸酯水分散体的合成。亲水性防雾涂料的合成包含两层涂料：底层涂料和面层涂料。底漆和面漆均为聚丙烯酸酯乳液。面层涂料通过使用极性亲水基团如羟基、羧基等以提供亲水性。对基材的附着力通过两层涂料的组合来提高，但需注意二层涂料会影响涂膜的透明性和增加施工成本。(1) Preparation of sulfonate-containing polyacrylate: Mix all acrylic monomers with chain transfer agents to prepare mixture I. Dissolve vinyl sulfonate monomers, initiators, and organic solvents to prepare mixture II. Add 10-30% of mixture I and 10‰ of mixture II into the reactor, stir and heat to 80-95°C for 30-60 minutes. Add the remaining mixture I and mixture II into the reactor over 4-6 hours, then maintain the temperature for 0.5-2 hours. Cool down to below 40-70°C, add neutralizing agent to neutralize, obtaining sulfonate-containing polyacrylate; (2) Preparation of water dispersion: Add 1-3 times the mass of sulfonate-containing polyacrylate in water, emulsify to a solid content of 20%, yielding sulfonate-containing polyacrylate water dispersion.含磺酸盐的聚丙烯酸酯水分散体的制备：按照质量份计，将相应质量份的甲基丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸羟乙酯、丙烯酸、链转移剂巯基乙醇混合制备混合液I；将相应质量份的2-丙烯酰胺-2-甲基丙磺酸、引发剂偶氮二异丁腈加入至N,N-二甲基甲酰胺和丙酮溶剂中，搅拌至完全溶解制备混合液II；向反应釜中加入10%质量的混合液I和10%质量的混合液II，搅拌，升温至80°C保温30分钟，控制剩余混合液I和II在6小时内滴加完成，保温2小时，降温至40°C后加入3.6份的2-氨基-2-甲基丙醇中和，得到含磺酸盐的聚丙烯酸酯。(1) Synthesis of hydrophilic polymer: First, prepare the raw material formulation with the following composition by weight: Solvent: acetone 25 parts; Acrylate monomers: Butyl methacrylate 15 parts, Methyl methacrylate 15 parts, Octyl acrylate 25 parts, Itaconic acid 1.0 parts, Hydroxypropyl methacrylate 11.5 parts, Allyl ether sulfate 4 parts; Initiator: azobisisobutyronitrile hydrochloride 1.0 parts; Neutralizing agent: triethylamine 1.5 parts; Chain transfer agents: dodecyl mercaptan 0.5 parts, thioglycol 0.5 parts; Total: 100 parts. (2) Prepare the sulfonate-containing polyacrylate by mixing the appropriate amounts of butyl methacrylate, methyl methacrylate, octyl acrylate, hydroxypropyl methacrylate, itaconic acid, thioglycol, and dodecyl mercaptan to make mixture I; In another container, dissolve the appropriate amounts of ally ether sulfate and azobisisobutyronitrile hydrochloride in acetone to make mixture II; Add 10% by weight of mixture I and 20% by weight of mixture II into the reaction kettle, stir, heat to 90°C and maintain for 60 min, then control the remaining mixtures I and II to be added dropwise within 4 hours, hold for 1.5 hours, cool to 50°C, and add 1.5 parts of triethylamine for neutralization to obtain sulfonate-containing polyacrylate. (3) Prepare the aqueous dispersion: Add 1.3 times the weight of deionized water to the obtained sulfonate-containing polyacrylate to emulsify, resulting in sulfonate-containing polyacrylate aqueous dispersion with a white, translucent appearance, solid content of 35%, average particle size of 176 nm, and viscosity at 25°C of 5000 CP."
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