MACROPOROUS GEL, ITS PREPARATION AND ITS USE

摘要

A macroporous gel is disclosed which is obtainable by a) polymerizing an aqueous solution of one or more water-soluble monomers selected from the group consisting of:N-substituted and non-substituted (meth)acrylamides;N-alkyl substituted N-vinylamides; hydroxyalkyl (meth)acrylates; vinylacetate;alkylethers of vinyl alcohol;ringsubstituted styrene derivatives; vinyl monomers; (meth)acrylic acid and salts thereof;silicic acid; andmonomers capable of forming polymers via polycondensation,under freezing at a temperature below the solvent crystallization point, at which solvent in the system is partially frozen with the dissolved substances concentrated in the non-frozen fraction of solvent to the formation of a cryogel, and b1) modifying the cryogel by introducing a member selected from the group consisting of ligands, charged groups, dyes and hydrophobic groups thereinto (i) in one or more steps by methods known per se subsequent to thawing of the cryogel or (ii), when appropriate, by using appropriately substituted monomers in the polymerization reaction; or b2) carrying out the polymerization in the presence of a filler, or; b3) carrying out the polymerization in the presence of a filler and, after thawing of the cryogel, modifying the cryogel as set forth under b1) above. A method for its preparation is also disclosed as is also some uses thereof.