Use as an agent improving the workability of an aqueous formulation with a hydraulic binder base, of a (meth)acrylic comb-branched copolymer and an associative acrylic thickener
AssigneeCoatex
InventorsDavid PLATEL, Jean MORO, Olivier GUERRET
Life of this patent
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Abstract
The present invention pertains to the use, in the manufacture of an aqueous formulation with a hydraulic binder base, of a combination of at least one comb-branched copolymer having a (meth)acrylic skeleton, onto which are grafted side-chains terminated by a hydrophilic group, and at least one ASE acrylic polymer. This results in improving the workability of said formulation, without causing a segregation phenomenon.
Claims16
1-22. (canceled)
A combination useful for improving the workability of an aqueous formulation with a hydraulic binder base, the combination comprising:
- an aqueous solution comprising water and a comb-branched (meth)acrylic copolymer having at least one side-chain bearing at least one alcoxy- or hydroxy-polyalkylene glycol hydrophilic group;
- and
- an aqueous solution comprising water and an ASE acrylic polymer consisting of 55 wt. % methacrylic acid and 45% wt. % ethyl acrylate.
The combination of claim 1, wherein the comb-branched (meth)acrylic copolymer comprises, expressed as a percentage by weight of each of its monomers:
- a1) 5% to 30% of (meth)acrylic acid,
- a2) 70% to 95% of at least one monomer of formula (I):
- wherein:
- m, n, p, and q are whole numbers and m, n, and p are less than 150, q is greater than 0, and at least one whole numbers among m, n, and p is nonzero;
- R is a radical comprising a polymerizable unsaturated function;
- R1 and R2 are identical or different, and represent a hydrogen atom or an alkyl group,
- R′ represents hydrogen, or a hydrocarbonated radical having 1 to 40 carbon atoms, or an ionic or ionizable group;
- a3) 0% to 50% of at least one monomer different from monomers a1) and a2),
- wherein a sum of percentages equals 100%.
Dependencies are inferred from the claim text.