Patent ID: 11912812
Assignee: REPSOL, S.A.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. The process according to claim 8 wherein the process comprises:
i) mixing at least one hydroxyalkylphosphonium salt (THPX) with an aqueous or alcoholic solution of a base;
ii) optionally filtering out the resulting solution;
iii) distilling off the solvent and volatiles, thus obtaining the mixture a.2) of compounds bearing a phosphorus atom;
iv) optionally filtering out the resulting solution;
v) optionally oxidizing the product obtained in iii) or the solution obtained in iv);
vi) mixing the at least one base polyol with the at least one monofunctional polyetheramine, thus obtaining the liquid polyol mixture;
vii) preparing the polymeric particles in the presence of the liquid polyol mixture obtained in vii by the reaction resulting from adding to the liquid polyol mixture obtained in vi), simultaneously or sequentially in any order
the at least one compound a.1) bearing at least one basic-nitrogen atom characterized by the presence in the molecule of at least one hydrogen atom attached to a nitrogen atom and is selected from melamine, trimethylol melamine, the compound of formula (I), the compound of formula (II), and mixtures thereof; and
the mixture a.2) of compounds bearing a phosphorus atom obtained in iii) or iv), the oxidized mixture obtained in v), or mixtures thereof mixtures thereof.