GB402733A - Improvement in colloidised mixed cellulose ester products - Google Patents

Abstract

Colloidised cellulosic materials are produced by dissolving a mixed cellulose ester containing less than 4 and more than \ba1/3\be higher fatty acid groups per 24 carbon atoms in the cellulose molecule, and removing the solvent by evaporation. The number of lower fatty acid groups present is preferably less than 11\ba2/3\be and more than 8. As higher fatty acids there are mentioned pelargonic, capric, lauric, myristic, palmitic, stearic, and oleic acids, and as lower fatty acids, acetic, propionic, and butyric acids. There may be present plasticizers, other plastic materials, gums, waxes, heavy metal soaps, higher fatty acids or their esters, resins, or oils. On account of the waterproof properties of the colloidized esters, they are useful for the production of films or sheets for wrapping foodstuffs; as a substitute for rubber in the manufacture of raincoats or the like; for waterproofing surfaces e.g., nitrocellulose lacquer surfaces, for impregnating fabrics, threads, paper, or fabric-insulated wire. The colloidized esters may also be used in the manufacture of lacquers, artificial leather, insulated wires, shatter-proof glass, bottles, or other glassware, knife handles, combs, insulators, cigarette holders, &c. Artificial silk may be produced by spinning a solution of one or several of the mixed esters, either into a hot inert gas, or into a non-solvent.ALSO:Colloidized, cellulosic materials are produced by dissolving a mixed cellulose ester containing less than 4 and more than 1/3 higher fatty acid groups per 24 carbon atoms in the cellulose molecule, and removing the solvent by evaporation. The number of lower fatty acid groups present is preferably less than 112 and more than 8. As higher fatty acids there are mentioned pelargonic, capric, lauric, myristic, palmitic, stearic, and oleic acids, and as lower fatty acids, acetic, propionic, and butyric acids. There may be present plasticizers, other plastic materials, gums, waxes, heavy metal soaps, higher fatty acids or their esters, resins, or oils. On account of the waterproof properties of the colloidized esters, they are useful for the production of films or sheets for wrapping food-stuffs; as a substitute for rubber in the manufacture of raincoats or the like; for impregnating fabrics, threads, paper, or fabric-insulated wire. The colloidized esters may also be used in the manufacture of artificial leather, insulated wires, shatter-proof glass, bottles, or other glassware, knife handles, combs, insulators, cigarette holders, &c.