Patent ID: 9102767
Filing Date: 2015-08-11
Classification: C08F,C10L,C10M,C10N

Abstract:
1. A method for synthesizing C 8 or higher, linear or branched fatty chain alkyl polyacrylates comprising at least one ethylene unsaturation, of weight average molecular weight Mw of less than 20,000 g/mole, free of sulphur-containing metallic and halogenated compounds, by radical polymerization in solution and whose residual monomer content measured by GPC is no more than 10 by weight, wherein the method comprises: (a) to a reactor, a starter being added consisting of the entirety of the acrylates monomer(s) either alone or optionally in solution in an organic solvent, and the reaction medium being placed under agitation (b) the starter derived from step (a) being brought to the polymerization temperature; (c) at the polymerization temperature, a radical initiator being continuously added optionally in solution in an organic solvent; (d) the reaction medium derived from step (c) is held at the polymerization temperature for several tens of minutes; (e) the reaction medium being cooled down to a temperature of between 50 and 60° C., and at least one polymerization inhibitor being added; and (f) the polymer in solution in the organic solvent being collected.