Use in a hydraulic binder composition of a dry-ground calcium carbonate with a copolymer of (meth) acrylic acid and an alkoxy or hydroxy polyalkyleneglycol group

Abstract

A dry-ground calcium carbonate obtained by dry-grinding calcium carbonate in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alkoxy or hydroxy polyalkyleneglycol group, and compositions of the dry-ground calcium carbonate with a hydraulic binder base.

1 - 8 . (canceled) 
     
     
         9 . A dry-ground calcium carbonate, obtained by dry-grinding a first calcium carbonate in the presence of a grinding aid agent comprising a copolymer which comprises:
 a) at least one anionic monomer selected from the group consisting of acrylic acid and methacrylic acid,   b) at least one non-ionic monomer of formula (I)   
       
         
           
           
               
               
           
         
         
           wherein
 m, n, p, and q are integers such that m, n, and p≦150, q≧1, and 5≦(m+n+p)q≦150, 
 
           R 1  and R 2  independently represent hydrogen or a methyl or ethyl radical, 
           R represents a radical containing an unsaturated polymerizable function selected from the group consisting of a vinylic, an acrylic ester, a methacrylic ester, a maleic ester, an acrylurethane, a methacrylurethane, an α-α′ dimethyl-isopropenyl-benzylurethane, an allylurethane, an optionally substituted allylic ether, an optionally substituted vinylic ether, an ethylenically unsaturated amide, an ethylenically unsaturated imide, an acrylamide, and a methacrylamide, and 
           R′ represents hydrogen or a hydrocarbon radical with 1 to 40 carbon atoms; and 
         
         c) optionally, at least one other monomer selected from the group consisting of (meth)acrylic anhydride, (meth)acrylamide, a (meth)acrylic ester with 1 to 20 carbon atoms in its ester radical, a hydroxylated methacrylate, an aromatic vinylic monomer, and an organophosphate monomer. 
       
     
     
         10 . The calcium carbonate according to  claim 9 , wherein the copolymer comprises, expressed as a percentage by weight of the monomers, wherein the sum of the percentages by weight of all the monomers equals 100%:
 a) 0.5% to 50% of the at least one anionic monomer;   b) 50% to 99.5% of the at least one non-ionic monomerof formula (I); and   (c) 0% to 50% of the at least one other monomer.   
     
     
         11 . The calcium carbonate of  claim 9 , wherein the copolymer is in acidic form and optionally distilled, and, optionally, is partially or totally neutralized at least one neutralization agent having a monovalent or polyvalent cation, wherein the at least one neutralization agent is selected from the group consisting of ammonia, calcium hydroxide, calcium oxide, magnesium hydroxide, magnesium oxide, sodium hydroxide, potassium hydroxide, lithium hydroxide an aliphatic primary amine, an aliphatic secondary amine, an aliphatic tertiary amine, a cyclic secondary amine, and a cyclic tertiary amine. 
     
     
         12 . The calcium carbonate of  claim 9 , wherein the copolymer is obtained by
 radical polymerization in solution, in a direct or reverse emulsion, in suspension or precipitation in a solvent, in the presence of at least one selected from the group consisting of a catalytic system and a chain transfer agent,   controlled radical polymerization by nitroxide mediated polymerization (NMP) or by a cobaloxime,   atom transfer radical polymerization (ATRP), or   by controlled radical polymerization by at least one sulphurated derivative selected from the group consisting of a carbamate, a dithioester, a trithiocarbonate, and a xanthate.   
     
     
         13 . The calcium carbonate of  claim 11 , wherein said copolymer is completely or partially neutralized and, before or after the total or partial neutralization reaction, is treated and separated into several phases, according to static or dynamic processes by at least one polar solvent selected from the group consisting of water, methanol, ethanol, propanol, isopropanol, a butanol, acetone, and tetrahydrofuran. 
     
     
         14 . The calcium carbonate of  claim 9 , wherein 0.05% to 5% by dry weight of the copolymer relative to a dry weight of the first calcium carbonate is used during the dry grinding. 
     
     
         15 . A composition, comprising:
 a hydraulic binder base; and   the calcium carbonate of  claim 9 .   
     
     
         16 . The composition of  claim 15 , in the form of cement, a concrete, or a mortar. 
     
     
         17 . The calcium carbonate of  claim 9 , wherein, in the copolymer, m, n, p, and q are integers such that: 15≦(m+n+p)q≦120. 
     
     
         18 . The calcium carbonate of  claim 9 , wherein, in the copolymer, R′ is a hydrocarbon radical with 1 to 4 carbon atoms 
     
     
         19 . The calcium carbonate of  claim 9 , wherein, in the copolymer, R′ is a methyl radical 
     
     
         20 . The calcium carbonate of  claim 9 , wherein, in the copolymer, the at least one other monomer is present and is methyl acrylate, ethyl acrylate, isopropyl acrylate, n-propyl acrylate, isobutyl acrylate, n-butyl acrylate, tert-butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, or ethyl methacrylate. 
     
     
         21 . The calcium carbonate of  claim 9 , wherein, in the copolymer, the at least one other monomer is present and is hydroxyethyl methacrylate, hydroxypropyl methacrylate, styrene, α-methylstyrene, styrene sulfonate, or acrylamido-2-methyl-2-propane-sulfonic acid. 
     
     
         22 . The calcium carbonate of  claim 9 , wherein, in the copolymer, the at least one anionic monomer is present in 1% to 25% by weight, based on a sum of percentages by weight of all monomers being 100%. 
     
     
         23 . The calcium carbonate of  claim 9 , wherein, in the copolymer, the at least one anionic monomer is present in 5% to 20% by weight, based on a sum of percentages by weight of all monomers being 100%. 
     
     
         24 . The calcium carbonate of  claim 9 , wherein, in the copolymer, the at least one non-ionic monomer of formula (I) is present in 75% to 99% by weight, based on a sum of percentages by weight of all monomers being 100%. 
     
     
         25 . The calcium carbonate of  claim 9 , wherein, in the copolymer, the at least one non-ionic monomer of formula (I) is present in 80% to 95% by weight, based on a sum of percentages by weight of all monomers being 100%. 
     
     
         26 . The calcium carbonate of  claim 9 , wherein 0.1% to 3% by dry weight of the copolymer relative to a dry weight of the first calcium carbonate is used during the dry grinding. 
     
     
         27 . The calcium carbonate of  claim 9 , wherein 0.1% to 1% by dry weight of the copolymer relative to a dry weight of the first calcium carbonate is used during the dry grinding. 
     
     
         28 . The calcium carbonate of  claim 9 , having 74.5% to 47.1% by weight of particles with an average diameter of 2 μm, and 44.1% to 30.0% by weight of particles with an average diameter of 2 μm, wherein the average diameter is measured with a Sedigraph™ 5100.