Patent ID: 8258228

Claim:
A composition intended to be applied to the surfaces of freshly placed or freshly demolded mortars and/or concretes, before the beginning of setting, in order to prevent the evaporation of the water necessary for their setting and for their hardening and to create, on said surfaces, high adhesiveness to finishing materials intended to cover surfaces, which composition is provided in the form of an aqueous emulsion comprising: a) at least one paraffin wax of petroleum or synthetic origin including, as a mixture, saturated and unsaturated aliphatic hydrocarbons of general formulae C n H 2n+2 and C n H 2n for which n is at least equal to 30 and for which the melting point is between 40° C. and 75° C.; b) at least one hydrocarbon compound which is a linear or cyclic hydrocarbon oil of aliphatic or naphthenic origin formed of hydrocarbon chains, alone or as a mixture, of general formulae C n H 2n+2 and C n H 2n for which n is less than 30; c) at least one ester-containing formed of at least one ester resulting from the condensation reaction of a saturated or unsaturated fatty acid with an alcohol having from one to five hydric functional groups; d) at least one latex which is formed of a colloidal aqueous emulsion of at least one polymer or copolymer chosen from the group consisting of homopolymers of acrylic acid, of methacrylic acid and of the esters of these acids, the ester group of which is a C 1 to C 12 alkyl group, copolymers of acrylic acid, of methacrylic acid or of the esters of these acids, the ester group of which is a C 1 to C 12 alkyl group, copolymers of vinyl and of acrylic acid or of methacrylic acid, copolymers of vinyl and of C 1 to C 12 esters, copolymers of acrylic acid or of methacrylic acid and acrylic or methacrylic esters, styrene/acrylic or methacrylic copolymers, copolymers of ethylene and of vinyl acetate, copolymers of ethylene and of acrylic or methacrylic acid, acrylic/urethane copolymers and styrene/butadiene copolymers; and e) at least one pulverulent filler of inorganic or organic origin.