首页> 外国专利> Free-radical polymerization process producing aqueous polymer dispersion with low residual monomer content utilizing oil and water soluble initiators

Free-radical polymerization process producing aqueous polymer dispersion with low residual monomer content utilizing oil and water soluble initiators

机译:自由基聚合工艺利用油和水溶性引发剂生产残留单体含量低的水性聚合物分散体

摘要

The present invention provides a novel one-step process for preparing an aqueous polymer dispersion by the free radical aqueous emulsion polymerization comprising mixing at least water, a dispersant, and an oil-soluble initiator; raising a temperature from the starting to the end reaction temperature while metering at least ethylenically unsaturated monomers and a water-soluble initiator into a reaction vessel, conducting polymerization of the monomers in the presence of the water-soluble initiator at a temperature up to the end reaction temperature, and when the temperature has reached the end reaction temperature, conducting polymerization by the oil-soluble initiator. The oil-soluble initiator is inactive at the starting reaction temperature and becomes more active as a temperature approaches the end reaction temperature at which the oil-soluble initiator is fully active.
机译:本发明提供了一种通过自由基水乳液聚合制备聚合物水分散体的新颖的一步法,该方法包括至少混合水,分散剂和油溶性引发剂。从反应温度开始到结束提高温度,同时将至少烯键式不饱和单体和水溶性引发剂计量加入反应容器中,在水溶性引发剂的存在下,在直至终点的温度下进行单体的聚合反应温度,并且当温度达到最终反应温度时,通过油溶性引发剂进行聚合。油溶性引发剂在起始反应温度下是惰性的,并且随着温度接近油溶性引发剂完全活性的最终反应温度而变得更具活性。

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