| 摘要 |
<p>Cosmetic or pharmaceutical composition comprises, in a medium, at least a polycondensate obtained by the reaction of: at least a polyol (10-30 wt.%) comprising 3-6 hydroxyl groups; at least 10-32C non-aromatic monocarboxylic acid (22-80 wt.% and 0.1-35 wt.%) having a melting temperature of >= 25[deg] C; at least 7-11C aromatic monocarboxylic acid (0.1-10 wt.%) optionally substituted by 1-3 alkyl radical comprising 1-32C; and at least polycarboxylic acid (5-40 wt.%) comprising at least 2 carboxylic (COOH) groups, preferably 2-4 COOH groups and/or cyclic anhydride of polycarboxylic acid. An independent claim is included for a preparation of the polycondensate comprising mixing the polyol and aromatic and non-aromatic monocarboxylic acids, heating the mixture under inert atmosphere, until the melting temperature (generally 100-130[deg] C) and a temperature of 150-220[deg] C until the complete consumption of monocarboxylic acids, then optionally cooling the mixture at a temperature of 90-150[deg] C, adding polycarboxylic acid and/or cyclic anhydride, and then heating at a temperature = 220[deg] C.</p> |
