cellulose acetate butyrate

noun

Definition of cellulose acetate butyrate

: any of several mixed esters that are formed by acylation of cellulose with a mixture of acetic and butyric acids and anhydrides and an acid catalyst, that are thermoplastic like cellulose acetates but have a wider range of solubility and are more moisture-resistant, and that are used in molded and extruded plastics and in lacquers

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