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Technical Data Sheet
Eastman™ Cellulose Acetate Butyrate (CAB-531-1)


Applications
  • Ace machinery & equipment
  • Adhesives/sealants-B&C
  • Apparel
  • Architectural coatings
  • Auto OEM
  • Auto plastics
  • Auto refinish
  • Automotive
  • Automotive parts & accessories
  • Automotive protective coatings
  • Coil coatings
  • Commerical printing inks
  • Compensation film
  • Consumer electronics
  • Consumer housewares-NFC
  • Device housings
  • Exterior architectural coatings
  • Flexographic printing inks
  • General industrial coatings
  • Graphic arts
  • Gravure printing inks
  • Industrial electronics
  • Leather coatings
  • Metal coatings
  • Metal furniture
  • Other-transportation
  • Pack & carton coatings
  • Paints & coatings
  • Protective coatings
  • Roofing
  • Safety glasses/shield
  • Small appliances non-food contact
  • Tac film
  • Truck/bus/RV
  • Wood coatings

Product Description
Eastman Cellulose Acetate Butyrate (CAB-531-1) is a cellulose ester with a higher butyryl level than Eastman CAB-381 type esters. Tough films with good resistance to marring and weathering are possible through combinations of cellulose acetate butyrate with thermoplastic acrylic resins. Eastman CAB-531-1 and CAB-381 esters are similar in hydroxyl content and solubility characteristics, both being soluble in a wide range of solvents. Eastman CAB-531-1 is a more flexible resin requiring lower plasticizer modification than the Eastman CAB-381 esters. 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 Content50 wt %
Acetyl Content2.8 wt %
Hydroxyl Content1.7 %
Viscosityd5.6 poise
Colorb50 ppm
Hazeb15 ppm
Acidity 
     as Acetic Acid0.02 wt %
Ash Content0.05 %
Refractive Index1.475
Heat Test 
     @ 160°C for 8 hrTan melt
Melting Point135-150 °C
Glass Transition Temperature (Tg)115 °C
Specific Gravity1.17
Wt/Vol 
     (Cast Film)1.17 kg/L (9.75 lb/gal)
Bulk Density 
     Poured480 kg/m3 (30 lb/ft3)
     Tapped576 kg/m3 (36 lb/ft3)
Dielectric Strength787-984 kv/cm (2-2.5 kv/mil)
Molecular Weightc 
     Mn40000
Tukon Hardness15 Knoops

bDetermination of color and haze made on CAB solutions using Pt-Co standard (color) and a monodisperse latex suspension (haze). Analysis performed with a Gardner Model XL-835 colorimeter.
cPolystyrene equivalent number average molecular weight determined by gel permeation chromatography.
dViscosity 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.