Absorption of low molecular weight compounds in aqueous dispersions of polymer‐oligomer particles, 2. A two step swelling process of polymer particles giving an enormous increase in absorption capacity
Absorption of low molecular weight compounds in aqueous dispersions of polymer‐oligomer particles, 2. A two step swelling process of polymer particles giving an enormous increase in absorption capacity
复制标题
DOI：
10.1002/macp.1979.021800317
复制
发表时间：
1979-03
影响因子：
2.5
通讯作者：
J. Ugelstad;K. Kaggerud;F. K. Hansen;A. Berge
中科院分区：
文献类型：
--
作者：
J. Ugelstad;K. Kaggerud;F. K. Hansen;A. Berge
描述了一种制备微水溶性化合物的稳定乳液的新方法。该方法意味着微水溶性化合物通过水扩散并被吸收到聚合物颗粒中，该聚合物颗粒在前面的步骤中已经被吸收了水不溶性的、相对低分子量的化合物。通过该两步溶胀过程，可以使聚合物颗粒吸收超过其自身体积100倍的低分子量化合物，以形成后者的稳定的水包油乳液，具有高油含量，并且具有完全由最初施加的胶乳中的聚合物颗粒的尺寸决定的液滴尺寸和尺寸分布。可以很容易地制备具有大液滴尺寸的单分散乳液。当第二步中添加的微水溶性化合物是可随后聚合的乙烯基单体时，该方法代表了一种种子技术，其特别有利于制备具有高固体含量的大粒径胶乳，包括单分散胶乳。
A novel method for preparation of stable emulsions of slightly water soluble compounds is described. The method implies that the slightly water soluble compound diffuses through water and becomes absorbed into polymer particles which in a previous step have been brought to absorb a water insoluble, relatively low molecular weight compound. By this two step swelling process the polymer particles can be brought to absorb more than 100 times their own volume of the low molecular weight compounds to form stable o/w emulsions of the latter, with high oil content, and with a droplet size and size distribution which is completely determined by the size of the polymer particles in the latex applied initially. Monodisperse emulsions with large droplet size could easily be prepared. When the slightly water soluble compound added in the second step is a vinyl monomer which may subsequently be polymerized, the method represents a seed technique which is especially favourable for preparation of latexes with large particles size, including monodisperse latexes, with high solid content.