Polyvinyl alcohol used as dispersion agent for polyvinyl chloride suspension polymerization, dispersant containing polyvinyl alcohol, and method for producing polyvinyl chloride using polyvinyl alcohol

摘要

Poly (vinyl alcohol) used as a dispersion agent for suspension polymerization of polyvinyl chloride60 to 80 mol%Block character from 0.4 to 0.6In the 1H NMR spectrum, the following (a) is 0.04 to 0.1.The poly (vinyl alcohol) isThe UV absorbance of a wavelength of 320 nm of 0.1 mass% aqueous solution is less than 0.18 and greater than 0.3Polyvinyl alcohol used as a dispersant for polyvinyl chloride suspension polymerization.(a) an integral value of 5.42 to 5.62 ppm of peak confirmed at 5.50 to 5.54 ppm when the integration value from 3.65 to 4.05 ppm of peak confirmed at 3.83 to 3.87 ppm is 100.(b) the integral value from 5.76 to 5.98 ppm at the peak confirmed at 5.86 to 5.90 ppm when the integral value from 3.65 to 4.05 ppm at peak detected at 3.83 to 3.87 ppm is 100.