GB164386A - Improvements in or relating to the manufacture of products having a basis of cellulose derivatives - Google Patents

Abstract

In the manufacture of solutions, films, artificial filaments, celluloid-like masses, electric insulating-materials, varnishes, coating and other compositions, preparations and articles having as a basis ethyl or methyl cellulose or other ether of cellulose but not including those employed in the processes of Specifications 164,384 and 164,385, the alkylated sulphonamide derivatives or preparations of Specifications 132,283, 133,353, and 154,334 are employed as high boiling point solvents or plastic-inducing agents, the ethers may be employed singly or in admixture with each other or with cellulose acetate, and in conjunction with the sulphonamide derivative there may be used other high boiling-point solvents such as triacetin, and lower boiling point solvents or liquids such as alcohol-benzene, and other additions such as triphenyl or tricresyl phosphate, castor oil, aliphatic derivatives of urea, colouring-matters, filling-materials, &c. In an example, a celluloid is prepared from an ethyl cellulose using as a high boiling point solvent, benzene-mono-methyl sulphonamide, toluene-o-mono-ethyl sulphonamide, or mixtures of isomeric xylene mono-methyl or mono-ethyl sulphonamides, in conjunction with triphenyl or tricresyl phosphate and alcohol-benzene; the hardness of the product is adjusted by increasing and decreasing simultaneously the proportions of sulphonamide and triphenyl or tricresyl phosphate. In another example describing a solution for use in the manufacture of films or as a varnish, the ethyl cellulose is dissolved in alcohol-benzene and the sulphonamide derivative added, with or without triphenyl or tricresyl phosphate. According to the Provisional Specification, the sulphonamide derivatives above specified may be used in the manufacture of products having for a basis nitrocellulose, nitro-acetyl cellulose, or other esters of cellulose other than cellulose acetate.