y, but crosslinkabe in neutral or alkalinityUS5902832 *20 ao???t 199611 mai 1999Menlo Care, Inc.Contacting a plurality of hydrophilic crosslinked particles formed from a polymer including polyoxyethylene glycol, polyvinylpyrrolidone, polyvinyl alcohol with an aqueous medium containing water soluble polymerEP0376931A1 *17 d???c. 19854 juil. 1990Collagen CorporationProcess for making collagen membra