| abstract |
Process for the preparation of a redispersible, free-flowing dispersion powder from a vinylpyrrolidone-vinyl acetate copolymer containing 15 to 40% by weight of copolymerized vinylpyrrolidone, the mixture of the monomers being copolymerized in organic solution, the solution thus obtained being subjected to a solvent exchange for water after the addition of a surfactant and the dispersion thus obtained is spray-dried or freeze-dried, the dispersion powder as such and its use for the production of paints and coatings, glues and adhesives and, in particular, of matrix and / or coating of solid pharmaceutical slow-release forms and of hairspray formulations. |