XB1968: Appearance light yellow granule Color(50%DMF liquid) <<2 Acid number(mgKOH/g) 28-36 Softening point (Ring& Ball) 110-120 Vitrification temperature(℃) 62-66 ICI viscosity(175℃Pa.s) 150-210 XB2968: Appearance light yellow granule Color( 50%DMF liquor) <<3 Acid number(mgKOH/g) 27-32 Softening point (Ring& Ball) 110-122 Vitrification temperature (℃) 63-66 ICI viscosity(175℃Pa.s) 130-160 XB3968: Appearance light yellow granule Color( 50%DMF liquor) <<3 Acid value(mgKOH/g) 32-38 Softening point (Ring& Ball) 110-122 Vitrification temperature(℃)63-66 ICI viscosity(175℃Pa.s) 110-150