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

Claim 11:
12. The process according to claim 7, wherein the process comprises:
i) mixing at least one tetrakis(hydroxymethyl) phosphonium 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) reacting
the mixture of compounds a.2) obtained in iii) or iv), the oxidized mixture as obtained in v) or mixtures thereof, with
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,
thus obtaining a mixture of condensation products a.3);

vii) mixing the at least one base polyol with the at least one monofunctional polyetheramine, thus obtaining the liquid polyol mixture;
viii) 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 vii), 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 of condensation products a.3) obtained in vi).