CPC C09K 8/588 (2013.01) [C08F 220/56 (2013.01); C09K 8/584 (2013.01); E21B 43/16 (2013.01); C08F 2800/20 (2013.01)] | 20 Claims |
1. A method for preparing a dispersion of a hydrophilic phase, comprising at least one water-soluble (co)polymer, in a lipophilic phase, comprising the following steps:
a) preparing a lipophilic phase comprising a lipophilic solvent and at least one monomer of formula (I):
wherein,
R1, R2, R3 are separately chosen from the group consisting of a hydrogen atom, a methyl group, a carboxylate group and Z—X,
Z is chosen from the group consisting of C(═O)—O; C(═O)—NH; O—C(═O); NH—C(═O)—NH; NH—C(═O)—O; and a saturated or unsaturated, substituted or unsubstituted carbon chain comprising 1 to 20 carbon atoms capable of comprising one or more heteroatoms chosen from nitrogen and oxygen,
X is a group chosen from the alkanolamides, sorbitan esters, ethoxylated sorbitan esters, glyceryl esters, and polyglycosides; and comprising a saturated or unsaturated, linear, branched or cyclic, optionally aromatic, hydrocarbon chain,
b) preparing a hydrophilic phase comprising at least one monomer different from the monomer of formula (I),
c) introducing the hydrophilic phase into the lipophilic phase with stirring in order to form a dispersion of hydrophilic phase in lipophilic phase, and
d) once the dispersion is formed, polymerization of the monomers of the hydrophilic phase and polymerization of at least one monomer of formula (I).
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