CROSSLINKABLE SILICONE COMPOSITION USEFUL, IN PARTICULAR FOR PRODUCING WATER-REPELLENT AND/OR OIL-REPELLENT COATING AND/OR IMPREGNATION, WITH LOW SURFACE ENERGY

摘要

The invention concerns an improved perfluorinated silicone composition to obtain antifouling coating and/or impregnation provided with improved properties for adhering to substrates and with increased life span. The invention concerns a crosslinkable silicone composition useful for making various supports water-repellent and/or oil-repellent to provide them with low surface energy. Said composition comprises: at least a POS A perfluorinated by radicals selected among the carboxylic diacid perfluorinated esters capable of forming anhydrides (e.g. maleic acid- bifid graft Gf); at least a crosslinking agent B (divinyltetramethyldisiloxane) perfluorinated or not and capable of reacting with the POS A; optionally a catalyst C; optionally one or several functional additives D. The selected crosslinking system is, for example, of the SiH/Sivinyl or the COOR/oxazolidine type with R = H, alkyl, NH4<+> of Na<+>. The invention also concerns the method for producing water-repellent and/or oil-repellent coating and/or impregnation on a support, method which consists in using said A, B, C, D composition. The invention is applicable to waterproof antifouling and/or spot-repellent coating for various bases such as textiles.