Patent GB-754473-A (GB)
Title: Improvements in or relating to the treatment of polysaccharide fibrous materials to reduce their water absorbency
IPC: D06M11/20
Filed: 1954-04-06
Abstract: Materials composed of polysaccharide fibres are treated with a solution of a titanium or zirconium compound and an aldehyde or ketone.  The materials may be yarns, fabrics or cordage of cotton, linen, hemp, jute, methyl cellulose, hydroxyethyl cellulose, cellulose acetate, nitrocellulose, or viscose or cuprammonium rayon. The metal compound may be a chloride, sulphate or chloride-acetate of titanium or zirconium, titanium citrate, chloride-citrate, gluconate or tartrate or an alkanolamine titanate or zirconate, and the aldehyde or ketone may be formaldehyde, glyoxal, acetaldehyde, probenzaldehyde, salicylaldehyde, methyl ethyl ketone, acetone or quinone.  The solvent is inert to the material treated and may be water or alcohol.  The metal and the aldehyde or ketone may be applied together in the same solution, the pH of which may be in the range 1 to 5, or in separate solutions, by dipping or spraying. After the impregnation excess solution is removed and the material is dried, or washed and dried, and heated at 50 DEG  to 150 DEG  C.  The process reduces the water absorbence of the fibres treated, improves crease and shrink resistance and may impart a desired configuration to the material treated.  The material may be held to a desired configuration during or after the impregnation.  In examples: (1) viscose rayon yarn is immersed in an aqueous solution of titanium tetrachloride, formaldehyde and sodium citrate, removed, squeezed to 100 per cent pick-up, dried in circulating air at 60 DEG  C., neutralized in a sodium carbonate solution, squeezed and dried; (3) cotton broadcloth is immersed in an aqueous solution of titanium tetrachloride and formaldehyde, squeezed to 100 per cent pick-up, dried at 80 DEG  C., cooled, cured at 80 DEG  C. in a taut condition, neutralized with a sodium carbonate solution, scoured with a solution comprising a wetting agent and sodium carbonate, washed in soap solution and dried. Metal compounds used in other examples are titanyl sulphate, titanium oxalate, glycollate, chloride-acetate, dichloride and trichloride, and zirconium tetrachloride.ALSO:Materials composed of polysaccharide fibres are treated with a solution of a titanium or zirconium compound and an aldehyde or ketone.  The materials may be yarns, fabric or cordage of cotton, linen, hemp, jute, methyl cellulose, hydroxyethyl cellulose, cellulose acetate, nitrocellulose, viscose or cuprammonium rayon, alginates or pectinats.  The metal compound may be a chloride, sulphate or chloride-acetate of titanium or zirconium, titanium citrate, chloride-citrate, gluconate or tartrate or an alkanolamine titanate or zirconate and the aldehyde or ketone may be formaldehyde, glyoxal, acetaldehyde, propionaldehyde, benzaldehyde, metahydroxybenzaldehyde, salicylalde-hyde, methyl ethyl ketone acetone or quinone, The solvent is inert to the material treated and may be water or alcohol.  The metal and the aldehyde or ketone may be applied together in the same solution, the pH of which may be in the range 1 to 5, or in separate solutions, by dipping or spraying. After the impregnation excess solution is removed and the material is dried, or washed and dried, and heated at 50 DEG C. to 150 DEG C. The process reduces the water absorbence of the fibres treated, improves crease and shrink resistance and may impart a desired configuration to the material treated.  The material may be held to a desired configuration during or after the impregnation.  In examples (1) viscose rayon yarn is immersed in an aqueous solution of titanium tetrachloride, formaldehyde and sodium citrate, removed, squeezed to 100 per cent pick-up, dried in circulating air at 60 DEG C., neutralized in a sodium carbonate solution, squeezed and dried; (3) cotton broadcloth is immersed in an aqueous solution of titanium tetrachloride and formaldehyde, squeezed to 100 per cent pick-up, dried at 80 DEG C., cooled, cured at 80 DEG C. in a taut condition, neutralized with a sodium carbonate solution, scoured with a solution comprising a wetting agent and sodium carbonate, washed in soap solution and dried.  Metal compounds used in other examples are titanyl sulphate, titanium oxalate, glycollate, chloride-acetate, dichloride and trichloride and zirconium tetrachloride.