Patent GB-431191-A (GB)
Title: Improvements in the production of artificial silk yarns and the likes
IPC: C08L1/08
Filed: 1933-11-01
Abstract: A composition comprises a cellulose derivative and rubber or chlorinated rubber dissolved in a solvent free from benzene or its derivatives and containing di-, tri-, or per-chlorethylene and/or methylene chloride.  The composition may be employed for the production of artificial silk, filaments, threads, films, sheets, and the like, in which case the preferred proportions are chlorinated rubber 30 to 50 parts and cellulose derivative (nitrate or acetate) 800 to 900 parts.  A typical solvent for such a mixture comprises trichlorethylene or methylene chloride 180 to 300 parts, and acetone 2000 to 3375 parts.  A further application of the composition is in the production of an odourless and grease-proof wrapping paper, and of coated textile and like sheets.  A suitable composition for this purpose comprises chlorinated rubber 15 to 20 parts, cellulose nitrate or acetate 60 to 80 parts, dissolved in a mixture of trichlorethylene 90 to 120 parts and acetone or methylene chloride 1000 to 1300 parts.  To this composition may be added a mixture of diethyl phthalate, castor oil and paraffin oil as plasticizer.  A paper base may be coated by passing it through the composition, which is maintained at a temperature of 28--38 DEG  C., and the coating dried by passing through a drying chamber.  The drying step is preferably followed by a humidifying operation by passing the coated paper through a tower containing humidified air.  In place of the cellulose acetate or nitrate there may be used benzyl cellulose.  The rubber and the cellulose derivatives may be dissolved together, or may be dissolved separately and the solutions mixed.ALSO:A composition comprises a cellulose derivative and rubber or chlorinated rubber dissolved in a solvent free from benzene or its derivatives and containing di-, tri-, or per-chlorethylene and/or methylene chloride.  The composition may be employed for the production of artificial silk, filaments, threads, films, sheets, and the like, in which case the preferred proportions are chlorinated rubber 30 to 50 parts and cellulose derivative (nitrate or acetate) 800 to 900 parts.  A typical solvent for such a mixture comprises trichlorethylene or methylene chloride 180 to 300 parts, and acetone 2000 to 3375 parts.  A further application of the composition is in the production of an odourless and grease-proof wrapping paper, and of coated textile and like sheets.  A suitable composition for this purpose comprises chlorinated rubber 15 to 20 parts, cellulose nitrate or acetate 60 to 80 parts, dissolved in a mixture of trichlorethylene 90 to 120 parts and acetone or methylene chloride 1000 to 1300 parts.  To this composition may be added a mixture of diethyl phthalate, castor oil and paraffin oil as plasticizer.  A paper base may be coated by passing it through the composition, which is maintained at a temperature of 28-38 DEG  C., and the coating dried by passing through a drying chamber.  The drying step is preferably followed by a humidifying operation by passing the coated paper through a tower containing humidified air.  In place of the cellulose acetate or nitrate there may be used benzyl cellulose.  The rubber and the cellulose derivatives may be dissolved together, or may be dissolved separately and the solutions mixed.