Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1993-02-19
1995-06-20
Lovering, Richard D.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
25218314, 252314, 264 43, 264 46, 430138, 430568, 430617, 502347, 502527, B01J 1320, B01J 1312, G03C 1725
Patent
active
054259932
ABSTRACT:
Process for obtaining submicronic particles, for example, pigments in the presence of lipidic vesicles having a lamellar structure, starting with at least one precursor of said particles involves preparing a dispersion of vesicles starting with at least one lipid capable of forming the walls of the vesicles and an aqueous phase E intended to be encapsulated in the said vesicles, and optionally an aqueous phase D, intended to form a dispersion medium of the said vesicles, at least one precursor of the said vesicles being dissolved in phase E and/or D, before and/or during and/or after the preparation of the vesicular phase, at least one agent capable of transforming the said precursor(s) into sought after particles being reacted with it (them) after introduction into the preparation medium.
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Tricot et al, "Colloidal catalyst-coated semiconductors in surfactant vesicles: in situ generation of rh-coated cds particles in dihexadecylphosphate vesicles and their utilization for photosensitized charge separation and hydrogen generation", J. Am. Chem. Soc., vol. 106, 1984 pp. 7359-7366.
Torchilin et al, "Polymerization of liposome-encapsulated hydrophilic monomers", Markomol. Chem., Rapid Commun., vol. 8, 1987, pp. 457-460.
Lety Alain
Morancais Jean-Luc
Vanlerbergue Guy
"L'Oreal"
Lovering Richard D.
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