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

Abstract

A paint comprising a calcium carbonate that is obtained by dry-grinding in the presence of a grinding aid agent comprising a copolymer of (meth)acrylic acid with a monomer containing an alkoxy or hydroxy polyalkyleneglycol group.

1 - 7 . (canceled) 
     
     
         8 . A paint, comprising a calcium carbonate which is dry-ground in the presence of a grinding aid agent comprising a copolymer comprising:
 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; 
         R′ represents hydrogen or a hydrocarbon radical with 1 to 40 carbon atoms; and 
         c) optionally, at least one other monomer selected from (meth)acrylic anhydride, a (meth)acrylamide, an acrylate with 1 to 20 carbon atoms in its ester radical, a methacrylate with 1 to 20 carbon atoms in its ester radical, a hydroxylated methacrylate, an aromatic vinylic monomer, an acrylate phosphate of ethylene glycol, an acrylate phosphate of oxyethylene glycol, an acrylate phosphate of oxypropylene glycol, an acrylate phosphate of oxyethylene and oxypropylene glycol, a methacrylate phosphate of ethylene glycol, a methacrylate phosphate of oxyethylene glycol, a methacrylate phosphate of oxypropylene glycol, and a methacrylate phosphate of oxyethylene and oxypropylene glycol. 
       
     
     
         9 . The paint of  claim 8 , wherein said copolymer comprises, expressed as a percentage by weight of the monomers in which 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 monomer of formula (I); and   c) 0% to 50% of the at least one other monomer.   
     
     
         10 . The paint of  claim 8 , wherein said copolymer is obtained in acidic form and optionally distilled, and is, optionally, partially or totally neutralized by at least one neutralization agent having a monovalent or polyvalent cation, wherein the neutralization agent is at least one 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. 
     
     
         11 . The paint of  claim 8 , wherein said 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   controlled radical polymerization by at least one sulphurated derivative selected from the group consisting of a carbamate, a dithioester, a trithiocarbonate, RAFT, and a xanthate.   
     
     
         12 . The paint of  claim 10 , wherein said copolymer is totally 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. 
     
     
         13 . The paint of  claim 8 , wherein 0.05% to 5% by dry weight of the copolymer relative to a dry weight of calcium carbonate is used during a dry grinding of said calcium carbonate. 
     
     
         14 . The paint of  claim 8 , wherein, in the copolymer, m, n, p, and q are integers such that: 15≦(m+n+p)q≦120. 
     
     
         15 . The paint of  claim 8 , wherein, in the copolymer, R′ is a hydrocarbon radical with 1 to 4 carbon atoms 
     
     
         16 . The paint of  claim 8 , wherein, in the copolymer, R′ is a methyl radical 
     
     
         17 . The paint of  claim 8 , 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. 
     
     
         18 . The paint of  claim 8 , 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. 
     
     
         19 . The paint of  claim 8 , wherein, in the copolymer, the at least one other monomer is present and is an acrylate phosphate of ethylene glycol, a methacrylate phosphate of ethylene glycol, an acrylate phosphate of oxyethylene glycol, an acrylate phosphate of oxypropylene glycol, an acrylate phosphate of oxyethylene and oxypropylene glycol, a methacrylate phosphate of oxyethylene glycol, a methacrylate phosphate of oxypropylene glycol, or a methacrylate phosphate of oxyethylene and oxypropylene glycol. 
     
     
         20 . The paint of  claim 8 , 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%. 
     
     
         21 . The paint of  claim 8 , 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%. 
     
     
         22 . The paint of  claim 8 , 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%. 
     
     
         23 . The paint of  claim 8 , 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%. 
     
     
         24 . The paint of  claim 8 , wherein 0.1% to 3% by dry weight of the copolymer relative to a dry weight of the calcium carbonate is used in dry grinding. 
     
     
         25 . The paint of  claim 8 , wherein 0.1% to 1% by dry weight of the copolymer relative to a dry weight of the calcium carbonate is used in dry grinding. 
     
     
         26 . The paint of  claim 8 , wherein 1% to 5% by dry weight of the copolymer relative to a dry weight of the calcium carbonate is used in dry grinding. 
     
     
         27 . The paint of  claim 8 , wherein the copolymer is partially or totally neutralized and the neutralization agent is triethanolamine or sodium hydroxide.