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Technical Data Sheet
Eastman™ Cellulose Acetate Butyrate (CAB-381-20)


Applications
  • Auto OEM
  • Auto plastics
  • Auto refinish
  • Automotive
  • Automotive parts & accessories
  • Cosmetic ingredients - nails
  • Small appliances non-food contact

Product Description

Eastman Cellulose Acetate Butyrate (CAB-381-20) is a cellulose ester with medium 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. When CAB-381-20 is dissolved in appropriate solvents a clear, colorless solution is produced. CAB-381-20 is supplied as a dry, free-flowing powder.

Eastman CAB-381-20 is based on cellulose, one of the most abundant natural renewable resources. The calculated approximate bio-content value of 41% for Eastman CAB-381-20 was determined by using six bio-based carbon atoms per anhyroglucose unit divided by the total number of carbons per anhyroglucose unit. Although the value reported is not specifically measured for bio-carbon, it can be estimated based on typical partition data.

For applications that require food contact compliance, please refer to Eastman CAB-381-20, Food Contact.



Typical Properties

PropertyTypical Value, Units
General
Viscositya 
     s20
     Poise76
Acetyl Content13.5 wt %
Butyryl Content37 wt %
Hydroxyl Content1.8 wt %
Moisture Content3.0 max %
Tgb141 °C
Bulk Density 
     Poured336 kg/m3 (21 lb/ft3)
     Tapped432 kg/m3 (27 lb/ft3)
Specific Gravity1.2
Acidity 
     as Acetic Acid<0.03 wt %
Ash Content0.05 %
Refractive Index1.475
Dielectric Strength787-984 kv/cm (2-2.5 kv/mil)
Tukon Hardness18 Knoops
Wt/Vol 
     (Cast Film)1.2 kg/L (10.0 lb/gal)
Heat Test 
     @ 160°C for 8 hrTan melt

aViscosity 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).
bGlass Transiton Temperature



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.
Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

12/5/2023 11:49:28 AM