Patent ID: 6706778
Filing Date: 2004-03-16
Classification: C08F,C08G

Abstract:
A process for the production of molded particles for microbial cell-immobilization which is characterized in that:an aqueous liquid composition which comprises: (a) an ethylenically unsaturated group-containing hydrophilic urethane resin which is obtained by making tertiary amino group-containing diol (i), which is selected from the group consisting of product (i-1) from a reaction between a diglycidyl compound and a secondary amine which is free of hydroxyl group and product (i-2) from a reaction between a monoglycidyl compound and a secondary amine which has hydroxyl group, react with polyisocyanate compound (ii) so that isocyanate group may exceed hydroxyl group in said diol (i), and further by making thus produced isocyanate group-containing urethane resin (iii) react with compound (v) which has both ethylenically unsaturated group and hydroxyl group; (b) a polymerization initiator; and (c) water-soluble macromolecular polysaccharides which are capable of gelation by contact with metal ion; is gelatinized, in an aqueous medium which contains metal ion, to be particulate gel, which is then subjected to photopolymerization and/or thermopolymerization by which to cause the crosslinking reaction of ethylenically unsaturated group in said particulate gel.