Process of manufacturing comb polymers by drying and then functionalization of the main (meth) acrylic chain, polymers obtained and their use

摘要

Process for manufacturing comb polymers having a (meth) acrylic main chain and polyoxyalkylated side groups, characterized in that it consists of: a) making a solution containing at least one homopolymer of (meth) acrylic acid and / or at least a copolymer of the (meth) acrylic acid with at least one other monomer, b) drying the solution obtained in step a), in order to obtain a homopolymer of the (meth) acrylic acid in the dry state and / or a copolymer of the acid ( met) acrylic with at least one other monomer in the dry state, c) mixing the product in the dry state obtained according to step b) with at least one molten alkoxypolyoxyalkylene glycol and / or at least one molten alkoxypolyoxyalkylene amine and / or at least one alkylene oxide in a liquid or gaseous state, d) then functionalize the homopolymer and / or the copolymer of (meth) acrylic acid by: - esterification with at least one alkoxypolyoxyalkylene glycol, which is preferred It is a methoxy polyoxyalkylene glycol, most preferably a methoxy polyoxyethylene glycol, - and / or amidification with at least one alkoxypolyoxyalkylene amine, which is preferably a methoxy polyoxyalkylene amine, most preferably a methoxy polyoxyethylene amine, - and / or ethoxylation with at least one alkylene oxide, which is preferably an ethylene oxide, or propylene oxide, or mixtures thereof.