Click for PDF View TDS
Technical Data Sheet
Eastman™ Cellulose Acetate Butyrate CAB-381-20BP, 100%


Applications
  • Auto OEM
  • Auto plastics
  • Auto refinish
  • Automotive
  • Automotive parts & accessories
  • Automotive protective coatings
  • Commerical printing inks
  • Consumer electronics
  • Consumer housewares-NFC
  • General industrial coatings
  • Graphic arts
  • Industrial electronics
  • Industrial maintenance
  • Metal coatings
  • Non-medical housings & hardware for elec
  • Paints & coatings
  • Process additives
  • Protective coatings
  • Small appliances non-food contact
  • Truck/bus/RV
  • Wood coatings

Product Description

Eastman Cellulose Acetate Butyrate (CAB-381-20BP), 100% grade ester is a slight modification of the standard CAB-381-20 cellulose acetate butyrate and has a lower viscosity. The BP grade was designed primarily to meet the needs of European formulators. When CAB-381-20BP is dissolved in appropriate solvents a clear, colorless solution is produced.

Eastman CAB-381-20BP is based on cellulose, one of the most abundant natural renewable resources, from trees harvested from sustainably managed forests. The calculated approximate bio-content value of 41% for Eastman CAB-381-20BP 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.



Typical Properties

PropertyTypical Value, Units
General
Viscositya 
     s16
     Poise20.8
Acetyl Content15.5 wt %
Butyryl Content35.5 wt %
Hydroxyl Content0.8 %
Moisture Content3.0 max %
Tgb128 °C
Melting range185-195 °C
Bulk Density 
     Poured336 kg/m3 (21 lb/ft3)
     Tapped432 kg/m3 (27 lb/ft3)
Specific Gravity1.2
Acidity 
     as Acetic Acid0.03 wt % max.
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 Transition 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.


9/27/2019 4:41:18 PM