Terpolymers based on alpha , beta -unsaturated dicarboxylic anhydrides, alpha , beta -unsaturated compounds and polyoxyalkylene ethers of lower unsaturated alcohols

摘要

Terpolymers based on alpha , beta -unsaturated dicarboxylic anhydrides, alpha , beta -unsaturated compounds and polyoxyalkylene ethers of lower unsaturated alcohols. The present invention relates to terpolymers based on alpha , beta -unsaturated dicarboxylic anhydrides, alpha , beta -unsaturated compounds and polyoxyalkylene ethers as defined in claim 1, and also a process for preparing the same as defined in claim 5. The invention likewise relates to a mixture of at least one terpolymer as defined in claim 1 and at least one ethylene-vinyl ester copolymer. The terpolymers of the invention, and mixtures thereof, are used as paraffin inhibitors in crude oils and petroleum products.