Verfahren zur Herstellung von Polyvinylbutyral und erhaltene Produkte.

摘要

Process for the manufacture of polyvinylbutyral by reaction of polyvinyl alcohol in aqueous solution with butyraldehyde. According to the invention an emulsifier is employed, chosen from sodium dodecylbenzenesulphonate, sodium lauryl sulphate and sodium sulphosuccinates, in a quantity of more than 0.4 % by weight of polyvinyl alcohol in the case of sodium dodecylbenzenesulphonate and sodium lauryl sulphate and more than 0.3 % in the case of sodium sulphosuccinates. The polyvinylbutyral obtained is employed in the manufacture of laminated glazing.