Patent ID: 7197887
Filing Date: 2007-04-03
Classification: F24F,F28D,Y02B

Abstract:
1. A method of making a polymeric hydrogel comprising an anhydride or acid-polymer, maleic anhydride or maleic acid polymer, or copolymer thereof, with an alkylvinylether or olefin, or copolymer thereof, crosslinked with a crosslinking agent having at least 2 crosslinkable groups, where the crosslinkable group is selected from the group consisting of an alcohol (—OH), amine (—NH 2 ) or alcohol-amine (—OH) (—NH 2 ), and water, which method comprises reacting a maleic anhydride or maleic acid polymer with a crosslinking agent having at least 2 crosslinkable groups in the presence of an esterification or amidation catalyst, in water as solvent.