Patent GB-868809-A (GB)
Title: Process of improving the resistance of textile materials and foils to the development of electrostatic charges thereon
IPC: D06M13/127
Filed: 1958-08-14
Abstract: Water-soluble or water-dispersible condensation products which, when applied to textile materials made from polyamides, polyesters, polyvinyl compounds, cellulose acetate or natural or regenerated proteins and hardened therein with the aid of catalysts, e.g. ammonium nitrate, reduce their tendency to become electrostatically charged, are produced from an aminotriazine or a derivative thereof, an aldehyde or ketone and a polyalkylene oxide.  Specified aminotriazines and their derivatives are melamine, hydroxydiaminotriazine and bimolecular condensation products, e.g. melam.  Preferred aldehydes and aldehyde-yielding compounds are formaldehyde, paraformaldehyde, trioxymethylene, hexamethylenetetramine, methylol, acetaldehyde, crotonaldehyde and benzaldehyde, and preferred ketones are acetone, acetophenone and cyclohexanone.  The polyalkylene oxide may be a polyethylene glycol with a molecular weight of at least 300 or a polymerization product of propylene oxide, or epichlorohydrin.  A preferred hardenable condensation product contains at least three moles of formaldehyde and one to three moles of polyalkylene oxide for each mole of melamine.  Part of the aminotriazine may be replaced by compounds containing amino groups linked to a CO, CS, C(NH) or CN group, e.g. urea, thiourea, urethane, guanidine, cyanamide, dicyanamide and dicyandiamidine.ALSO:Textile materials and foils made from polyamides, polyesters, polyvinyl compounds, cellulose acetate or natural or synthetic proteins, having an improved resistance to the formation of electrostatic charges thereon, are produced by forming in and/or on the surface thereof a hardened water-soluble or water-dispersible condensation product of an amino triazine or derivative thereof, an aldehyde or ketone and a polyalkylene oxide. The textile material or foil may be impregnated with an aqueous solution of a water-soluble or water-dispersible preliminary condensation product of an amino triazine or a derivative thereof, an aldehyde or ketone and a polyalkylene oxide together with a hardening catalyst, e.g. ammonium nitrate, and then dried at 60 DEG -150 DEG C. Alternatively the textile material or foil may be impregnated with an aqueous liquor containing a preliminary condensation product of an amino triazine or a derivative thereof and an aldehyde or ketone, an uncondensed polyalkylene oxide and a hardening catalyst, and then treated to condense the polyalkylene oxide with the preliminary condensate to form a hardened condensation product in and/or on the surface of the textile material or foil.  Specified amino triazines and their derivatives are melamine, hydroxydiaminotriazine and bimolecular condensation products, e.g. melam.  Preferred aldehydes and aldehyde-yielding compounds are formaldehyde, paraformaldehyde, trioxymethylene, hexamethylenetetramine, methylal, acetaldehyde, crotonaldehyde and benzaldehyde, and preferred ketones are acetone, acetophenone and cyclohexanone. The poly alkylene oxide may be a polyethylene glycol with a molecular weight of at least 300 or a polymerization product of propylene oxide or epichlorohydrin.  A preferred hardenable condensation product contains at least three moles of formaldehyde and one to three moles of polyalkylene oxide for each mole of melamine.  Part of the amino triazine may be replaced by compounds containing amino groups linked to a CO, CS, C(NH) or CN group, e.g. urea, thiourea, urethane, guanidine, cyanamide, dicyanamide and dicyandiamidine.