Branched polymer dispersant

摘要

The present invention relates to the use of a branched addition copolymer as a dispersant in a gaseous, liquid or solid formulation in a range of applications and branched addition copolymers suitable for same wherein the copolymer is obtainable by an addition polymerisation process, wherein said copolymer comprises: at least two chains which are covalently linked by a bridge other than at their ends; and wherein the at least two chains comprise at least one ethyleneically monounsaturated monomer, and wherein the bridge comprises at least one ethyleneically polyunsaturated monomer; and wherein the polymer comprises a residue of a chain transfer agent and wherein the mole ratio of polyunsaturated monomer(s) to monounsaturated monomer(s) is in a range of from 1:100 to 1:4; and wherein the branched copolymer dispersant contains anchoring, solubilising or stabilising moieties and wherein the resulting copolymer comprises at least 10% styrenic monomer, brancher or chain transfer agent.