Patent ID: 8088251

Claim:
A process for preparing a paper or paper board which comprises the steps of: i) providing a cellulosic thick stock, ii) diluting the thick stock of step i) to form a thin stock, iii) draining the thin stock of step ii) on a wire to form a web, and iv) drying the web of step iii) to form paper or paper board, wherein the cellulosic thick stock of step (i) comprises anionic organic polymeric microparticles, wherein the organic polymeric microparticles are formed from a composition comprising at least one acrylic anionic monomer and at least one acrylic non-ionic monomer, wherein the acrylic non-ionic monomer is at least one of (meth)acrylamide; an N—C 1-4 -alkyl (meth)acrylamide; an N,N-di(C 1-4 -alkyl) (meth)acrylamide; or a C 1-4 -alkyl(meth)acrylate, and the acrylic anionic monomer is at least one of (meth)acrylic acid; 2-acrylamido-2-methyl-1-propanesulfonic acid; or salts thereof, and wherein the acrylic anionic monomer and the acrylic non-ionic monomer are present in the composition in a weight ratio of 80/20 to 20/80.