Eastman cellulose acetate butyrate CAB-321-0.1 is designed for use in automotive basecoats which are subsequently topcoated in typical basecoat/clearcoat automotive formulation systems.This cellulose ester is similar to CAB-381-0.1,but displays better resistance to attack and redissolve by solvents contained in typical clearcoats.Because of its redissolve resistance,CAB-321-0.1 may also be useful in wood sealers and plastic barrier coatings. Table 1 | Typical Propertiesa |
Butyryl content,avg.wt% | 32.5 | Acetyl content,avg.wt% | 17.5 | Hydroxyl content,avg.wt% | 1.3 | Viscosity,secb | 0.1 | Viscosity,mp●s(cP)b | 38 | Color,ppmc | 20 | Haze,ppmc | 5 | Free acidity,as acetic acid,wt% max. | 0.03 | Moisture content,wt% max. | 3.0 | Refractive index | 1.475 | Melting range,oC | 165-175 | (oF) | (329-347) | Specific gravity | 1.20 | Weight/volume(cast film) | | Kg/L | 1.20 | lb/gal | 10.0 | Dielectric strength | | kV/mil | 2.0-2.5 | kV/cm | 787-984 | Glass transition temperature,oC(oF) | 127(260) |
aProperties reported here are typical of average lots.Eastman makes no representation that the material in any particular shipment will conform to the listed properties.
bViscosity determined by ASTM Method D 1343 in the solution described as Formula
A,ASTM Method D 817.
cDetermination 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 product)haze standards.
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