used for the mechanical tests film thickness 2 mm the odor of the aldehydes or of the polyaldimines or of the compositions respectively was assessed by nasal odor sampling at a distance of 10 cm on the material applied as a film at room temperature for compositions this was performed a first time on the material applied immediately beforehand and a second time 7 days thereafter on the material cured at 23 u00b0 c and 50 relative humidity the hydrolysis of the polyaldimines was carried out by adding the stoichiometric amount of 0 1n hcl relative to the aldimine groups to 10 ml of each polyaldimine and briefly mixing it in after one hour the odor of the hydrolyzed polyaldimine was assessed by nasal odor sampling at a distance of 10 cm on the material applied as a film at room temperature polyaldimines pa1 to pa7 were prepared using aldehydes a1 to a6 whose preparation is described below a round bottomed flask with reflux condenser thermometer and water separator dean stark was charged with 40 5 g of formaldehyde 37 in water methanol free 36 0 g of isobutyraldehyde 100 0 g of lauric acid and 1 0 g of 4 toluenesulfonic acid and placed under a nitrogen atmosphere the mixture was heated in an oil bath at 90 u00b0 c with vigorous stirring until the reflux rate had dropped significantly at that point the bath temperature was raised to 120 u00b0 c and the mixture was.