| abstract |
Process for the preparation of aqueous alkalisnsoluble polyvinyl alcohol by partial acetalizationna polyvinyl alcohol (PVAL) with a sulfonic acid groupnPen-containing aldehyde in an aqueous medium by upnto a maximum of 10 mol% of the hydroxyl groups of the PVAL,nbased on the PVAL, with a (C₃-C₇) alkanal-3-sulfonenacid and the reaction product if necessarynconverted with bases into water-soluble salts.n n n Use of the thus prepared and in aqueous Alnkalien soluble PVAL derivatives as textile sizing agents, fernner for the production of cast films, foils, coatingsnof substrates or as an emulsifying and / or dispersing agentntel and / or as a protective colloid. |