Process for thickening a composition, through the use of a direct emulsion in water, which is alkali-swellable, of a polymer of the ASE or HASE type, which is both rich in acrylic acid and which has a certain quantity of AMPS. The use of such emulsions simultaneously allows there to be no obligation to use surfactants and organic solvents other than water, and allows the thickening phenomenon to be activated for pHs of less than 7: this latter characteristic is particularly advantageous for formulations intended to be used in contact with skin.
通过在
水中使用可碱溶的 A
SE 或 HA
SE 型聚合物的直接乳液来增稠组合物的工艺,这种聚合物既富含
丙烯酸,又含有一定量的
AMPS。同时使用这种乳液,就不必再使用除
水以外的表面活性剂和有机溶剂,而且可以在 pH 值小于 7 的情况下激活增稠现象:后一种特性对于用于与皮肤接触的配方尤其有利。