Method of rendering regenerated cellulose water-repellent

Claim 1

THE METHOD OF RENDERING FIBERS, YARNS AND FABRICS COMPRISING REGENERATED CELLULOSE CONTAINING THE MOISTURE NORMALLY HELD BY CELLULOSE IN EQUILIBRIUM WITH THE ATMOSPHERE AT PREVAILING AMBIENT TEMPERATURES AND HUMIDITIES COMPLETELY WATER-REPELLENT AND RESISTANT TO COLORATION BY DYESTUFFS WHICH NORMALLY DYE REGENERATED CELLULOSE, WITHOUT SUBSTANTIAL DEGRADATION OF THE CELLULOSE, WHICH COMPRISES TREATING THE FIBERS, YARNS, AND FABRICS WITH A SOLUTION OF AN ORGANO-SILICON HALIDE SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, AND ARALKYL SILICON HALIDES IN A WATERIMMISCIBLE ORGANIC SOLVENT THEREFOR FOR FROM TEN TO FIFTEEN MINUTES AT A CONTROLLED TEMPERATURE BETWEEN 0 AND 10*C., WASHING THE TREATED MATERIAL, PRIOR TO DRYING THEREOF, WITH A DILUTE AQUEOUS ALKALINE SOLUTION AT 10*C. FOR ABOUT TEN MINUTES, THEN WASHING THE MATERIAL WITH WATER AT ROOM TEMPERATURE UNTIL IT IS NEUTRAL, AND THEN DRYING THE ARTICLE.

Claim 2

THE METHOD OF RENDERING FIBERS, YARNS AND FABRICS COMPRISING REGENERATED CELLULOSE CONTAINING THE MOISTURE NORMALLY HELD BY CELLULOSE IN EQUILIBRIUM WITH THE ATMOSPHERE AT PREVAILING AMBIENT TEMPERATURES AND HUMIDITIES COMPLETELY WATER-REPELLENT AND RESISTANT TO COLORATION BY DYESTUFFS WHICH NORMALLY DYE REGENERATED CELLULOSE, WITHOUT SUBSTANTIAL DEGRADATION OF THE CELLULOSE, WHICH COMPRISES TREATING THE FIBERS, YARNS, AND FABRICS WITH A SOLUTION OF AN ORGANO-SILICON HALIDE SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, AND ARALKYL SILICON HALIDES IN A WATERIMMISCIBLE ORGANIC SOLVENT THEREFOR FOR FROM TEN TO FIFTEEN MINUTES AT A CONTROLLED TEMPERATURE BETWEEN 0 AND 10*C., WASHING THE TREATED MATERIAL, PRIOR TO DRYING THEREOF, WITH A DILUTE AQUEOUS ALKALINE SOLUTION AT 10*C. FOR ABOUT TEN MINUTES, THEN WASHING THE MATERIAL WITH WATER AT ROOM TEMPERATURE UNTIL IT IS NEUTRAL, AND THEN DRYING THE ARTICLE.