Eastman CAB 381-20Application/Uses
Automotive OEM
Coatings
Coatings for Automotive Plastics
Coatings for cloth
Coatings for leather
Coatings for plastic
Coatings for wood
Heat seal adhesive
Lacquers for automotive
Lacquers for paper
Lacquers for plastic
Lacquers for wood
Nail care
Truck/Bus/Commercial Vehicles
伊士曼CAB 381-20Product Description
Remarkable polymers with a renewable backbone provided by nature itself.
Eastman™ Cellulose Acetate Butyrate (CAB-381-20) is a cellulose ester with high butyryl content and high ASTM(A) viscosity. Other than a higher viscosity and higher molecular weight, this cellulose ester shares the same general characteristics as CAB-381-0.1 and CAB-381-0.5. CAB-381-20 offers a combination of solubility and compatibility, moisture resistance, excellent surface hardness, and good film strength. CAB-381-20 is supplied as a dry, free-flowing powder. Eastman™ cellulose esters are based on up to sixty percent cellulose, one of the most abundant natural renewable resources.
Eastman CAB 381-20Typical Properties
| Property | Typical Value, Units | |||
| Butyryl Content | 37 wt % | |||
| Acetyl Content | 13.5 wt % | |||
| Hydroxyl Content | 1.8% | |||
| Viscosity a | 76 poise | |||
| Color b | 125 ppm | |||
| Haze b | 35 ppm | |||
| Acidity as Acetic Acid | <0.03 wt % | |||
| Ash Content | 0.05% | |||
| Refractive Index | 1.475 | |||
| Heat Test @ 160°C for 8 hr | Tan melt | |||
| Melting Point | 195-205°C | |||
| Specific Gravity | 1.2 | |||
| Wt/Vol (Cast Film) | 1.2 kg/L (10.0 lb/gal) | |||
| Bulk Density | ||||
|
336 kg/m3 (21 lb/ft3 ) | |||
|
432 kg/m3 (27 lb/ft3 ) | |||
| Dielectric Strength | 787-984 kv/cm (2-2.5 kv/mil) | |||
| Molecular Weight c Mn | 70000 | |||
| Glass Transition Temperature (Tg) | 141°C | |||
| Tukon Hardness | 18 Knoops | |||
| a Viscosity determined by ASTM Method D 1343. Results converted to poises (ASTM Method D 1343) using the solution density for Formula A as stated in ASTM Method D 817 (20% Cellulose ester, 72% acetone, 8% ethyl alcohol). b Determination of color and haze made on a solution of the cellulose ester dissolved in MIBK using Pt-Co color standards and Johns-Manville Celite (diatomaceous silica products) haze standards. c Polystyrene equivalent number average molecular weight determined by gel permeation chromatography. |
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| Comments Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given. |
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