Under the conditions modeling the modification of LBK-3 butyl rubber latex by polysaccharide (carrageenane) the effect of polymeric phase on the properties of interphase adsorption layer is observed. It is shown that the formation of surfactant- polysaccharide complexes in a thin interphase layer is the main factor of additional structure-mechanical stability. Structure of polysaccharides determines the complexes stability degree.