Eastman Cellulose acetate butyrate CAB-381-20
| Property | Numerical value,unit |
| Butyryl content | 38% |
| Acetyl content | 13.5% |
| Hydroxyl group content | 1.30% |
| Viscosity | 2 seconds per 7.6 pokes |
| Colour | 125 ppm |
| Light fog | 35 ppm |
| Refractive index | 1.475 |
| Melting point | 171-184℃（340-363℉） |
| Specific gravity | 1.2 |
| Weight/volume ratio (cast film) | 1.2 kg/l(10 lb/gal) |
| casting | 352 kg/m3(22 lb /ft3) |
| Dielectric strength | 787-984 kv/cm |
| Glass transition temperature(TG) | 133-271℃ |
| Molecular weight Mnf | 20000 |
1.The addition of CAB to metal coating can accelerate the release of solvent from the film and shorten the drying time
2.CAB as a leveling agent, can improve the leveling, eliminate paint film shrinkage
3.CAB added to plastic coating, can enhance wear resistance, color stability, increase toughness;
4.the addition of CAB in the car primer helps to better promote the shrinkage of the primer and the directional arrangement of aluminum powder when the solvent volatiles;
5. added in the automotive repair paint system, can shorten the drying time, improve the resistance to cold cracking, and has good polishing performance;
6. CAB added varnish, can strengthen the adhesion, gloss and light preservation, so that the system has crosslinking characteristics and drying speed
