High acid content latexes can be produced through the use of novel polyethyleneoxy sulfonates surfactants. An aqueous emulsion can be produced from the reaction product of vinyl acid monomer and another copolymerizable monomer or monomers. The vinyl acid monomer being present in an amount equal to about 5% to about 50% by weight based on total weight of the monomers and the surfactant is present in an amount equal to about 0.1 to about 10 weight percent based on the total weight of monomers and is represented by the formula:
wherein:
R1 is an alkyl or dialkyl having at least 6 carbon atoms;
R2 is hydrogen or an aryl group;
n is at least 3; and
Me is NH4, Na, Li or K.
High solids content aqueous vinyl acetate emulsions having long term stability are provided by polymerizing vinyl acetate in the presence of the above surfactant and water wherein R2 is an aryl group and n is greater than 9. The quantity of water is predetermined so as to produce a latex having at least 40% solids.
通过使用新型聚乙氧基
磺酸盐表面活性剂,可以生产出高酸含量的胶乳。
乙烯基酸单体和另一种或多种可共聚单体的反应产物可制成
水性乳液。
乙烯基酸单体的存在量相当于单体总重量的约 5%至约 50%,表面活性剂的存在量相当于单体总重量的约 0.1%至约 10%,并由式表示:
其中
R1 是至少有 6 个碳原子的烷基或二烷基;
R2 是氢或芳基
n 至少为 3;以及
Me 是 NH4、Na、Li 或 K。
通过在上述表面活性剂和
水的存在下聚合
醋酸乙烯酯,其中 R2 为芳基,n 大于 9,可得到具有长期稳定性的高固体含量
醋酸乙烯酯
水乳液。
水的数量是预先确定的,以便生产出固体含量至少为 40% 的胶乳。