A process produces microporous powders or shaped articles, in particular membranes in the form of flat films, tubular films or hollow fibers, which may be used for controlled release of an active compound, for dialysis, gas separation, ultrafiltration or microfiltration, from polyvinylidene fluoride...http://www.google.es/patents/US4968733?utm_source=gb-gplus-sharePatente US4968733 - Process for producing microporous powders and membranes
Process for producing microporous powders and membranes
