Aqueous polymeric dispersions are used extensively as
thickeners in cosmetics and pharmaceutical products to improve
their rheological properties (1–3). The cross-linked
thickeners can form a networked microgel structure in solutions
and are very useful as platforms in drug delivery applications
because controlled release of medicaments are possible
(4,5). Also, the microgel network can resist the physiological
stress caused by body or skin movement and can
adopt the shape of the application area