Patent ID: 7459186
Filing Date: 2008-12-02
Classification: C04B,C08F,C08L,C09D

Abstract:
1. In a process for providing water repellency and stain resistance to a masonry surface wherein an aqueous based polymeric coating is applied to the masonry surface and the water removed thereby leaving a polymeric coating adhered to the masonry surface, the improvement in such process which comprises the aqueous based polymeric coating is an aqueous-based ethylene-vinyl acetate polymer emulsion, wherein the ethylene-vinyl acetate polymer is comprised of crystalline ethylene segments and is prepared by emulsion polymerizing ethylene and vinyl acetate in the presence of a stabilizing system, said ethylene-vinyl acetate polymer having: (a) a crystalline melting point ranging from 35 to 110° C. measured at a heat rate of 20° C. per minute; and, (b) a tensile storage modulus of at least 1×10