PVB FILM CONTAINING A PLASTIFYING AGENT

摘要

Previously, the use of triethylenglycol-di-2-ethylhexanoate otherwise known as 3G8 or 3GEH as a plastifying agent having a low polarity for polyvinylbutyral films (PVB films) was restricted to PVB types having a polyvinylalcohol content (PVOH) of less than19.5 wt. %. According to the invention, one or several surfactants is/are used as an additive in order to increase the solubility or compatibility of the low-polarity plastifying agent in PVB resin, thereby enabling the use of low-polarity plastifying agents such as 3G8, particularly in standard-PVD-based mixtures. A multiple ethoxylated aliphatic or aromatic alcohol is used as a non-ionic surfactant, containing at least 6 carbon atoms in the alcohol proportion thereof, having an average ethoxylation degree which is greater than or equal to 2. The invention is used for PVB preparations containing a plastifying agent, especially a standard-PVD-based plastifying agent, in the production of films for composite security glass.