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 that requires lower plasticizer modification than the Eastman CAB-381 esters. When CAB-531-1 is dissolved in appropriate solvents a clear, colorless solution is produced.
Eastman CAB-531-1 is based on cellulose, one of the most abundant natural renewable resources, from trees harvested from sustainably managed forests.
For applications that require food contact compliance, please refer to Eastman CAB-531-1, Food Contact.