The Composition of β-Aminoaldehyde Acetal of Polyvinyl Alcohol

Abstract

Polyvinyl alcohol was acetalized by β-cyclohexylamino-n-butyraldehyde dimethyl acetal with H2SO4 catalyst. The composition of so obtained β-amino-acetalized polyvinyl alcohol was studied. In the case of α-aminoacetalized polyvinyl alcohol half-acetal linkage had been reported, but in the present case the existence of half-acetal linkage was denied. Sulfate combined with amino group in mol ratio of 1: 2 can not be removed by dialysis, if the concentration of the polymer is kept higher than 3% in dialysis.