美國伊士曼 CAB 531-1 抗紫外線涂料級(醋酸丁酸纖維素)重要物性參數:
Butyryl Content 50 wt %
Acetyl Content 2.8 wt %
Hydroxyl Content 1.7%
Viscosity a 5.6 poise
Color b 50 ppm
Haze b 15 ppm
Acidity as Acetic Acid 0.02 wt %
Ash Content 0.05%
Refractive Index 1.475
Heat Test @ 160°C for 8 hr Tan melt
Melting Point 135-150°C
Glass Transition Temperature (Tg)
115°C
Specific Gravity 1.17
Wt/Vol (Cast Film) 1.17 kg/L (9.75 lb/gal)
Poured
480 kg/m3 (30 lb/ft3 )
Tapped
576 kg/m3 (36 lb/ft3 )
Dielectric Strength 787-984 kv/cm (2-2.5 kv/mil)
Molecular Weight c Mn
40000
Tukon Hardness 15 Knoops
醋酸丁酸纖維素 Cellulose Acetate Butyrate 簡稱CAB。
CAB主要功能
1、 改善流平;
2.、抑制流掛和縮孔從而減少表面缺陷;
3、縮短干燥時間;
4、促進金屬顏料的定向排列;
5、耐溶劑侵蝕;