Cellulose acetate "safety" photographic

The manufacture of cellulose acetate involves the acetylation of cellulose from cotton linters or wood pulp by acetic anhydride and acetic acid. Production started about 30 years ago, and early products that were developed include safety photographic films, airplane dopes, and acetate fabrics. It is now also produced in the form of sheeting, rods, and tubes and is widely used as a molding compound. 

Cellulose acetate has replaced cellulose nitrate in many products, for example, in safety-type photographic films. When a solution of cellulose acetate in acetone is passed through the fine holes of a spinneret and the solvent evaporates, solid filaments are produced. Acetate rayon is prepared from threads of these filaments. Some applications and solvents of commercial cellulose acetate grades are summarized in Table 9-5. 

Chem. Descrip. Triphenyl phosphate CAS 115-86-6 EINECS/ELINCS 204-112-2 Uses Flame retardant, plasticizer for photographic safety film, sheets, cast triacetate film (primary plasticizer), molded acetate prods., nitrocellulose, ethyl cellulose, and cellulose acetate butyrate coatings, ABS, unsat. polyester, PVAc, PVC, flexible PU foam Features Mostly used combined with other plasticizers improves dimensional stability and dielec. str. 

Cellulose acetate, or mixed esters such as acetate-butyrate are widely used in photographic film, safety film, and lacquers. 

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