Patent ID: 7721898
Filing Date: 2010-05-25
Classification: A61M,A61P,B32B,C12N

Abstract:
1. A filter for removing leukocytes and platelets, said filter having a polymer consisting of: 5-45 mol % of a unit originating from a hydrophobic polymerizable monomer selected from the group consisting of: methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, phenyl acrylate, phenyl methacrylate, ethylhexyl acrylate, ethylhexyl methacrylate, trichloroethyl acrylate, and trichloroethyl methacrylate; 1-15 mol % of a unit originating from a polymerizable monomer containing a basic nitrogen-containing part, wherein said polymerizable monomer is selected from the group consisting of: dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, 3-dimethylamino-2-hydroxypropyl acrylate, and 3-dimethylamino-2-hydroxy propyl methacrylate; and the balance of a unit originating from a polymerizable monomer containing a protonic neutral hydrophilic part, wherein said polymerizable monomer is 2-hydroxyethyl methacrylate or hydroxypropyl methacrylate, wherein the filter has an average pore diameter of 1-60 μm, and said polymer is present on the entire surface of the filter in an amount of 5-50 mg/m