Patent GB-790838-A (GB)
Title: Improvements in or relating to the production of anti-crease and like finishes on textile materials
Inventor: SLOAN FREDERICK RICHARD WILFRE
IPC: D06M15/423
Filed: 1955-02-04
Abstract: In a process wherein textiles are treated with an aminoaldehyde resin intermediate and a catalyst in aqueous solution and are then heated to insolubilize the resin, the aqueous solution is one obtained by condensing an amine with formaldehyde in a neutral or slightly alkaline aqueous solution employing a mol. ratio of formaldehyde to amine sufficient to produce mainly a dimethylol compound, and thereafter adding a further amount of an amine such that the molecular ratio of formaldehyde to amine groups is less than that which would be necessary to produce a dimethylol compound.  Initially the molecular ratio of formaldehyde to amino groups exceeds 0.8 to 1 and is generally 1 to 1.  The added amine reduces the ratio to less than 0.8 to 1.  The condensate may be of urea, thiourea or melamine with formaldehyde.  The added amine may be urea or melamine.  In Example (1) urea, formaldehyde and caustic soda in a solution of pH 8.5 are heated at 30 DEG  C. for 4 hours and allowed to stand for 18 hours, after which further urea is added and the mixture is stirred for a few hours.  Fibres, rovings, yarns, knitted or woven fabrics, felts or garments of cotton or linen may be treated.  Fabrics may be treated by impregnation or in localized areas.  After treatment, fabrics may be mangled, dried on an overfeed stenter at 100 DEG  C. and then steamed at 140 DEG  C.  The process may be combined with a mechanical treatment for the production of glazed or embossed effects and colours may be fixed.  Specifications 291,473, 291,474, 304,900, [all are in Class 15 (ii)], and 790,837 are referred to.ALSO:In a process wherein textiles are treated with an aminoaldehyde resin intermediate and a catalyst in aqueous solution and are then heated to insolubilize the resin, the aqueous solution is one obtained by condensing an amine with formaldehyde in a neutral or slightly alkaline aqueous solution employing a mol. ratio of formaldehyde to amine sufficient to produce mainly a dimethylol compound, and thereafter adding a further amount of an amine such that the molecular ratio of formaldehyde to amino groups is less than that which would be necessary to produce a dimethylol compound.  Initially the molecular ratio of formaldehyde to amino groups exceeds 0.8 to 1 and is generally 1 to 1.  The added amine reduces the ratio to less than 0.8 to 1.  The condensate may be of urea, thiourea or melamine with formaldehyde.  The added amine may be urea or melamine.  In Example (1), urea, formaldehyde and caustic soda in a solution of pH 8.5 are heated at 30 DEG  C. for 4 hours and allowed to stand for 18 hours, after which further urea is added and the mixture is stirred for a few hours.  Fibres, rovings, yarns, knited or woven fabrics, felts or garments of cotton or linen may be treated.  Fabrics may be treated by impregnation or in localized areas.  After treatment, fabrics may be mangled, dried on an overfeed stenter at 100 DEG  C. and then steamed at 140 DEG  C.  The process may be combined with a mechanical treatment for the production of glazed or embossed effects, and colours may be fixed.  Specifications 291,473, 291,474, 304,900, [all in Class 2(3)], and 790,837 are referred to.