It has been thought to be almost impossible to obtain waterresistance and solution stability at once, however, Kuraray EXCEVAL™ realized the compatibility of both performance, based on Kuraray’s accumulated PVOH technology.   Conventional PVOH EXCEVAL™ Fully hydrolyzed Partially hydrolyzed Fully & medium hydrolyzed Properties Water resistance Solution stability Gas barrier

Grade name Specification Appearance Viscosity (1) (mPa.s) DH (mol%) Volatiles (%max) Ash (2) (%max) pH RS-1117 White powder 23-30 97.5-98.5 5.0 0.7 5.0-7.0 RS-1717 White powder 23-30 92-94 5.0 0.7 5.0-7.0 RS-1113 White powder 15.5-21.0 97-98 5.0 0.7 5.0-7.0 RS-1713 White powder 15-21 92-94 5.0 0.7 5.0-7.0 RS-2117 White powder 25-30 97.5-99 5.0 0.7 5.0-7.0 HR-3010 White powder 12-16 99-99.4 5.0 0.7 5.0-7.0 (1) Viscosity is measured at 4% aqueous solution at 20(68) determined by Brookfield viscometer. (2) Ash content is measured at dry basis as Na2O. (3) Tentative specifioation.