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COMPOSITION COMPRENANT DES MICROPARTICULES POLYMÈRES ORGANIQUES, ANIONIQUES RÉTICULÉES, SA PRÉPARATION ET SON UTILISATION DANS DES PROCÉDÉS DE FABRICATION DE PAPIER ET DE CARTON
COMPOSITION COMPRENANT DES MICROPARTICULES POLYMÈRES ORGANIQUES, ANIONIQUES RÉTICULÉES, SA PRÉPARATION ET SON UTILISATION DANS DES PROCÉDÉS DE FABRICATION DE PAPIER ET DE CARTON
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摘要
The present invention concerns a composition being an inverse emulsion comprising cross-linked anionic, organic polymeric microparticles, said microparticles having an unswollen z-average particle size diameter of less than 0.75 μm, wherein the organic polymeric microparticles are formed from a monomer mixture comprising (a) an ethylenically unsaturated carboxylic acid, or a salt thereof; (b) an ethylenically unsaturated non-ionic monomer; and (c) from 1 to 10 mole % of 2-acrylamido-2-methylpropanesulphonic acid, or a salt thereof. The invention also provides a process for preparing the composition, the use of the composition in a paper or paperboard making process and methods of making paper or paperboard employing said composition.
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