Small particle size polyester/acrylic hybrid latexes
    10.
    发明授权
    Small particle size polyester/acrylic hybrid latexes 失效
    小粒度聚酯/丙烯酸混合胶乳

    公开(公告)号:US6001922A

    公开(公告)日:1999-12-14

    申请号:US911702

    申请日:1997-08-15

    摘要: This invention provides the preparation of water-dispersible polyester/acrylic hybrids via a two-stage emulsion polymerization process. For example, methacrylic acid and/or 2-hydroxyethyl methacrylate are copolymerized with styrene/acrylic monomers to yield a relatively hydrophilic and hydro-plasticized first stage. Subsequent additions of hydrophobic monomers to this first stage "seed" results in an inversion of the latex such that the more hydrophilic first stage is at the particle surface. This results not only in improved stability of the resulting latex without the use of additional surfactants, as evidenced by the production of reduced amounts of coagulum, while it also offers relatively low minimum filming temperatures due to the hydroplasticization of the shell of the particle. Furthermore, the use of the water-dispersible polyester results in extremely fine latex particle sizes which can significantly enhance coating properties such as film gloss and clarity.

    摘要翻译: 本发明通过两步乳液聚合方法提供了水分散性聚酯/丙烯酸杂化物的制备。 例如,甲基丙烯酸和/或甲基丙烯酸2-羟乙酯与苯乙烯/丙烯酸单体共聚以产生相对亲水和加氢的第一级。 随后向第一阶段“种子”中加入疏水性单体导致胶乳反转,使得亲水性较高的第一级位于颗粒表面。 这不仅导致所得胶乳的稳定性在不使用附加表面活性剂的情况下得到改善,如通过生产减少量的凝结物所证明的,同时由于颗粒的壳体的水力化也提供了相对较低的最低成膜温度。 此外,使用水分散性聚酯导致极细的胶乳粒径,其可以显着增强涂层性能,例如膜光泽度和透明度。