in table 2 with the resin base vinyl acetate ethylene 4 630 g of water 78 g of polyvinylalcohol w 25 140 wacker chemie gmbh munich and 230 g of polyvinylalcohol m 05 140 wacker chemie gmbh munich 800 g of ethylene and a portion of a monomer mixture of 2 430 g of vinylacetate and silane type and amount according to table 2 were initially introduced into a 15 l stirred autoclave and the initial mixture was heated to 50 u00b0 c the catalyst solutions a 6 0 strength aqueous sodium persulfate solution and a 3 strength aqueous sodium formaldehyde sulphoxylate solution 1 1 were now introduced after a reaction time of 1 hour metering of the remaining amount of the vinyl acetate silane mixture was started the duration of metering was about 5 hours after an after polymerization of 2 hours the autoclave was let down the solids content was between 50 and 51 the residual monomer content was about 0 3 no silane was incorporated in the comparison examples 4 and 5 these were used to determine the 34 0 value 34 for powder solubility and film crosslinking before the spraying operation 10 by weight solid for solid of polyvinylalcohol m 13 140 wacker chemie gmbh munich was admixed to the dispersion in the form of an 11 strength aqueous solution and the mixture was diluted to 33 with water the dispersions were sprayed in a nubilosa spray dryer under the abovementioned conditions the solubility of the dispersion powders was determined analogously to the determination in table 1 with the difference that dimethylformamide was employed as the solvent and the solubility was evaluated qualitatively in addition the crosslinkability of films which are obtained by redispersing the powder.