Patent ID: 8703846

Claim:
An aqueous formulation, comprising a hydraulic binder base and a) at least one comb-branched (meth)acrylic copolymer having at least one side-chain bearing at least one alkoxy- or hydroxy-polyalkylene glycol hydrophilic group, b) at least one comb-branched (meth)acrylic copolymer having at least one side-chain bearing at least one alkoxy- or hydroxy-polyalkylene glycol hydrophobic group, wherein said comb-branched copolymer a) comprises, expressed as a percentage by weight of each of its monomers, the sum of those percentages being equal to 100%: a1) 5% to 30% of (meth)acrylic acid, a2) 70% to 95% of at least one monomer having the formula (I): where: m, n, p and q are whole numbers and m, n, p are less than 150, q is greater than 0, and at least one whole number of m, n and p is not 0; R is a radical that includes a polymerizable unsaturated function; R 1 and R 2 are identical or different, and represent hydrogen or alkyl, R′ represents hydrogen or a hydrocarbon radical having 1 to 3, or an ionic or ionizable group, and a3) 0% to 50% of at least one monomer different from monomers a1) and a2), and which is selected from the group consisting of an ester, an amide, an ether, a styrenic monomer, a cationic monomer, a sulfonated monomer, and a phosphated monomer.