Copolymers of hydrophobic acrylates or methacrylates and hydrophilic comonomers, their preparation and their use as oil demulsifiers

Abstract From the Canadian patent

Abstract of the Disclosure: Copolymers of hydrophobic acrylates or methacrylates, whose alcohol component is derived from a mixture of polyglycols and polyglycol ethers, with hydrophilic ethylenically unsaturated comonomers are suitable as oil demulsifiers and, in the, said copolymers, (i) all or virtually all of the free OH groups are etherified, esterified or converted to urethane groups and/or (ii) the acid used as a catalyst in the esterification is neutralized by adding an amine.