Preparation method of composite emulsion of cation-nonionic waterborne polyurethane-polyacrylate
A technology of polyacrylate and waterborne polyurethane, which is applied in the field of cationic-nonionic waterborne polyurethane-polyacrylate composite emulsion, and can solve the problems of not being able to provide reliable preparation methods
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[0022] ①Preparation of polyacrylate containing terminal hydroxyl groups
[0023] The mixture of all monomers, chain transfer agents and initiators is evenly added dropwise into the solvent for free radical polymerization.
[0024] A) The formula is shown in Table 1.
[0025] Table 1
[0026]
[0027]
[0028] B) specific operation
[0029]According to the formula given in Table 1, a solvent is added to a four-necked flask equipped with a stirrer, a thermometer, a dry nitrogen conduit and a reflux condenser tube as a primer, and the ethylene containing cationic hydrophilic groups is added at 75 to 85 ° C. Base monomers, acrylate monomers containing non-ionic segments, acrylate monomers containing larger steric hindrance groups, other monomers containing vinyl structures, mercapto-containing diol chain transfer agents and initiators and stir the mixture evenly, and evenly drop it into the solvent in the four-necked flask within 3 hours, and keep it warm at 80°C for 5 ho...
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