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


Chemical Synonym
  • Cellulose Acetate Butyrate
Applications
  • Aerosol coatings
  • Aerospace coatings
  • Architectural coatings
  • Auto OEM
  • Auto plastics
  • Auto refinish
  • Automotive
  • Automotive parts & accessories
  • Building materials
  • Coil coatings
  • Coil coatings-appliances
  • Commerical printing inks
  • Compensation film
  • Consumer electronics
  • Cosmetic ingredients - nails
  • Device housings
  • Exterior architectural coatings
  • Flexographic printing inks
  • General industrial coatings
  • Graphic arts
  • Gravure printing inks
  • Industrial electronics
  • Industrial maintenance
  • Leather coatings
  • Metal coatings
  • Motorcycles
  • Nonwoven substrates
  • Other-transportation
  • Pack & carton coatings
  • Packaging inks non food contact
  • Paints & coatings
  • Photographic imaging film
  • Polymer modification
  • Process additives
  • Process solvents
  • Protective coatings
  • Rubber and plastic additives
  • Small appliances non-food contact
  • Tools
  • Touch screen
  • Truck/bus/RV
  • Wood coatings
  • Wood furniture exterior

Product Description
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.

Typical Properties

PropertyTypical Value, Units
General
Butyryl Content37 wt %
Acetyl Content13.5 wt %
Hydroxyl Content1.8 %
Viscosityc76 poise
Colora125 ppm
Hazea35 ppm
Acidity 
     as Acetic Acid<0.03 wt %
Ash Content0.05 %
Refractive Index1.475
Heat Test 
     @ 160°C for 8 hrTan melt
Melting Point195-205 °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)
Molecular Weightb 
     Mn70000
Glass Transition Temperature (Tg)141 °C
Tukon Hardness18 Knoops

aDetermination 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.
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.