Patent ID: 6881761
Filing Date: 2005-04-19
Classification: B01J,C08F,C08J,G01N,Y10T

Abstract:
1. A porous polymer particle comprising a polymer substrate having ester bonds, wherein the polymer substrate having ester bonds is (1) a polyvinyl alcohol substrate comprising a copolymer of a carboxylic acid vinyl ester and an isocyanurate-base crosslinking monomer, a part of the ester groups being saponified into a hydroxyl group or hydroxyl groups, (2) a substrate obtained by polymerizing one or more monomers selected from the group consisting of acrylate- and methacrylate-base crosslinking monomers each having a hydroxyl group, or (3) a substrate comprising a copolymer having a hydroxyl group obtained by saponifying a part of a copolymer of an alkanoyloxystyrene and divinylbenzene, and wherein a group containing a quaternary ammonium structure is connected to the substrate through a spacer molecule having three or more atoms between the surface of the substrate and an ion exchange group.