Emulsion of an associative acrylic polymer polymerized in the presence of polyglycerols and use of same as a thickening agent in an aqueous composition

摘要

The invention relates to novel emulsions containing associative acrylic thickeners that when polymerized in the presence of specific polyglycerols have a remarkably stable thickening power over time. The visometric shift resulting from said type of thickener is thus considerably reduced in particular in low VOC (Volatile Organic Compound) paints or paints having no VOCs which shift occurs very quickly after several days of storage. The user is thus ensured of identical application properties with regard to the respective paint i.e. a rheological profile that is preserved for the paint formulated and applied irrespective of the storage time of said paint and over a potential time period of several months.