USE OF A HYDROPHILIC-HYDROPHOBIC BLOCK COPOLYMER AS A DEMULSIFYING AGENT AND DEMULSIFYING COMPOSITION MADE FROM SUCH A COPOLYMER

摘要

The invention relates to the use, as a demulsifying agent for aqueous emulsions, of a block copolymer of general formula (I): poly(HB)_y-b-[poly(G)_x]_n (I), wherein n represents a non-zero number, x represents a number between 1 and 60, y represents a number between 5 and 60, poly(HB) represents a polymer or copolymer block with a hydrophobic character, and poly(G) represents a linear or branched polymer or copolymer block, the units of which carry free hydroxyl functions, and which is likely to be prepared from an optionally protected glycidol monomer, or from an epichlorohydrin monomer. A composition comprising such a block copolymer has particularly advantageous demulsifying properties.