GRAFTS POLYMERS

摘要

A water-soluble graft copolymer of a polyalkylene glycol and a water-soluble ethylenically unsaturated monomer said graft polymer having a weight average molecular weight of above 100,000, wherein the graft polymer is obtainable by the reaction of the polyalkylene glycol with the water-soluble ethylenically unsaturated monomer in which the reaction is conducted in the presence of a type II photo initiator and by the action of actinic radiation. The polymer may be used as a flocculant. It is particularly suitable as a clay and/or shale inhibitor.