Nomenclature
CAS number: 9004-57-3
Cellulose ethyl ether; Ethocel.
Description and references
Prepd from wood pulp or chemical cotton by
treatment with alkali and ethylation of the alkali cellulose with
ethyl chloride. Review and bibliography: E. Ott, Cellulose and Cellulose Derivatives (New
York, 2nd ed., 1955).
Properties
White granules. Soly is dependent upon the degree
of substitution. Commercial ethyl cellulose has an ethoxy content
of 43-50%. A 47% product softens at 140° and is sol in ethyl acetate,
ethylene dichloride, benzene, toluene, xylene, butyl acetate, acetone,
methanol, ethanol, butanol, carbon tetrachloride. To avoid brittleness,
ethyl cellulose formulations usually include an antioxidant such as
hydroquinone monobenzyl ether, 4-hexylpyrocatechol, or diphenylamine.Use
In the manuf of plastics and lacquers. Pharmaceutic
aid (tablet binder).