Cellulózacetátbutirát

Cellulózacetátbutirát, often abbreviated as CAB, is a thermoplastic material derived from cellulose. It is a cellulose ester, meaning it is produced by reacting cellulose with acetic anhydride and butyric anhydride. This chemical modification results in a polymer with properties distinct from pure cellulose or other cellulose esters like cellulose acetate. CAB is known for its toughness, clarity, and good weatherability. It is also resistant to a variety of chemicals, including oils and greases.

The physical properties of CAB can be tailored by adjusting the ratios of acetate and butyrate groups in its molecular structure, as well as its degree of substitution. This versatility makes it suitable for a wide range of applications. It is commonly used in the production of films, coatings, and molded articles. For instance, CAB films are employed in packaging, photographic film bases, and as protective layers. In coatings, it provides durability and gloss to surfaces. As a molded plastic, it finds use in eyeglass frames, tool handles, and consumer goods where its impact resistance and aesthetic qualities are valued.

CAB is generally considered a safe material. It is biodegradable, although the rate of degradation depends on environmental conditions. Its production involves chemical processes that require careful handling, but the final product is stable and non-toxic under normal use. The manufacturing process typically involves esterification of cellulose, followed by purification and pelletization for subsequent processing.