高缩醛度pvb树脂 指标 挥发份含量 不挥发份含量 醇 缩丁醛基 基 含量 10%粘度 酸值 单位 wt-% wt-% wt-% wt-% wt-% mpa.s mgkoh/g sdl-28b ≤2.0 ≥98.0 76-85 ≤3.0 12-17 9-14 ≤0.5 sdl-18b ≤2.0 ≥98.0 76-85 ≤3.0 14-20 ≤0.5 sdl-08b ≤2.0 ≥98.0 76-85 ≤3.0 12-17 20-30 ≤0.5 sdl-04b ≤2.0 ≥98.0 76-85 ≤3.0 12-17 30-35 ≤0.5 sdl-05b ≤2.0 ≥98.0 76-85 ≤3.0 12-17 35-60 ≤0.5 sdl-06b ≤2.0 ≥98.0 76-85 ≤3.0 12-17 80-110 ≤0.5 sdm-01 ≤2.0 ≥98.0 76-85 ≤3.0 12-17 160-260 ≤0.5 sd-98 ≤2.0 ≥98.0 76-85 ≤3.0 12-17 50-80 ≤0.05 sd-76 ≤2.0 ≥98.0 76-85 ≤3.0 12-17 160-260 ≤0.05 sd-75c ≤2.0 ≥98.0 76-85 ≤3.0 12-17 850-1200 ≤0.03 sd-75a ≤2.0 ≥98.0 76-85 ≤3.0 12-17 1200-1500 ≤0.03 ?