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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. Eastman cellulose esters are based on up to sixty percent cellulose, one of the most abundant natural renewable resources.

Typical Properties

PropertyTypical Value, Units
General
Butyryl Content36 wt %
Acetyl Content15.5 wt %
Colora68 ppm
Hazea7 ppm
Acidity 
     as Acetic Acid0.03 wt % max.
Moisture Content3 wt %
Ash Content0.05 %
Refractive Index1.475
Heat Test 
     @ 160°C for 8 hrTan melt
Melting Point185-195 °C
Specific Gravity1.2
Wt/Vol 
     (Cast Film)1.2 kg/L (10.0 lb/gal)
Bulk Density 
     Poured336 kg/m3 (21 lb/ft3)
     Tapped432 kg/m3 (27 lb/ft3)
Dielectric Strength787-984 kv/cm (2-2.5 kv/mil)
Glass Transition Temperature (Tg)128 °C
Molecular Weightb 
     Mn70000
Tukon Hardness18 Knoops
Hydroxyl Content0.8 %
Viscosityc20.8 poise

aDetermination of color and haze is made on CAB solution using Pt-Co color standards (color) and a monodisperse latex suspension (haze). Analysis is performed with a Gardner Model XL-835 colorimeter.
bPolystyrene equivalent number average molecular weight determined by gel permeation chromatography.
cViscosity 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).



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.