MULTIFUNCTIONAL ADDITIVE FOR LUBRIFICATING OILS AND PROCESS FOR THE PREPARATION THEREOF

摘要

"MULTIFUNCTIONAL ADDITIVE FOR LUBRIFICATING OILS AND PROC ESS FOR THE PREPARATION THEREOF" Multifunctional additive for lubrificating oils consisting of a base copolymer and of monomers grafted to said base copolymer; - said base copolymer being the product of copolymerization of at least an alkyl metacrylate containing from 1 to 4 carbon atoms in its alkyl group, with at least an alkyl metacrylate containing from 10 to 18 carbon atoms in its alkyl group; - said graft monomers comprising at least a member select ed from the class consisting of N-vinylimidazoles, Nvinylpyrrolidones, vinylpyridines and N,N-dialkylamino-ethyl-metacrylates; and at least a member selected in the class of compounds definable by means of the general formula: CH3 O CH2 = C - C - ¢O-CH2CH2!n- NHR wherein : ? is O or 1; R is a group selected from: < IMG >