Patent GB-911227-A (GB)
Title: Process for producing antistatic dressings on synthetic fibres
IPC: D06M13/358
Filed: 1959-01-21
Abstract: An aqueous composition suitable for the treatment of synthetic fibres comprises (a) anions of an acid and cations of an alkylene polyamine, the two forming together a neutral salt of the alkylene polyamine, (b) a water-soluble diglycidyl ether of a diol of the formula H-[O-CH2.CH2-]k-OH in which K is a whole number of 1-15, more than one epoxy equivalent being present per equivalent of the acid of the anions, and (c) as hardening agent, either an excess of the alkylene polyamine required to form the neutral salt of the alkylene polyamine with the anions or at least one other polyamine.  The alkylene polyamines used may be those in which all the amine groups are bound to alkylene groups which are linked together directly or through -NH-, -N(Alkyl)-, -O- or -S- groups and may be substituted by saturated or unsaturated, unbranched alkyl groups which may be bound through a bridge member, e.g. -CO-, to a nitrogen atom or by residues of the formula -[CH2CH2O-]x-R in which x is a whole number and R is a hydrogen atom or an alkyl or acyl group. Reaction products of alkylene polyamines with condensation products of polyethylene glycols with epichlorhydrin which contain terminal chlorhydrin groups may be used.  The acid anions may be those of hydrochloric, sulphuric, orthophosphoric, formic, acetic, succinic or benzoic acid. The polyamine (c) used as hardening agent may be an aliphatic, aromatic, alicyclic or heterocyclic polyamine containing primary, secondary or tertiary amino groups.  The diglycidyl ether (b) preferably contains 1-11,5 epoxy equivalents per kilogram and is preferably present in concentrations between 0,2 and 8% by weight. The proportion of polyamine serving as hardening agent preferably amounts to 0,2-2 amino groups per excess epoxy group in the polyglycidyl ether.  After impregnation with the composition the fibres may be dried at 30 DEG -50 DEG C. and hardening of the finish effected by heating to 110 DEG -130 DEG C.ALSO:Synthetic fibres, e.g. cellulose di- and triacetates, polyacrylonitrile, polyester, polyamide, polyurethane, polyvinylchloride and polyvinylidene chloride fibres, are rendered anti-static by impregnating them with an aqueous preparation which contains (a) anions of an acid and cations of an alkylene polyamine, the two together forming a neutral salt of the alkylene polyamine, (b) a water-soluble diglycidyl ether of a diol of the formula in which k is a whole number of 1-15, more than one epoxy-equivalent being present per H-[O-CH2,CH2-]k-OH in which k is a whole number of 1-15, more than one epoxy-equivalent being present per equivalent of the acid of the anions, and (c) as hardening agent, either an excess of the alkylene polyamine required to form the neutral salt of the alkylene polyamine with the anions or at least one other polyamine, drying them and subjecting them to heat treatment.  The alkylene polyamines used may be those in which all the amino groups are bound to alkylene groups which are linked together directly or through -NH-, -N (Alkyl)-, -O- or -S- groups and may be substituted by saturated or unsaturated, unbranched alkyl groups which may be bound through a bridge member, e.g. -CO-, to a nitrogen atom or by residues of the formula -[CH2CH2O-]x-R in which x is a whole number and R is a hydrogen atom or an alkyl or acyl group. Reaction products of alkylene polyamines with condensation products of polyethylene glycols with epichlorhydrin which contain terminal chlorhydrin groups may be used.  The acid anions may be those of hydrochloric, sulphuric, ortho phosphoric, formic, acetic, succinic or benzoic acid.  The polyamine (c) used as hardening agent may be an aliphatic, aromatic, alicyclic or heterocyclic polyamine containing primary, secondary or tertiary amino groups.  The diglycidyl ether (b) preferably contains 1-11.5 epoxy equivalents per kilogram and is preferably present in concentrations between 0.2 and 8% by weight. The proportion of polyamine serving as hardening agent preferably amounts to 0.2-2 amino groups per excess epoxy group in the polyglycidyl ether. The fibres are preferably impregnated with the aqueous preparation at room temperature by padding, dried at 30 DEG -50 DEG C. and hardened by heating at 110 DEG -130 DEG C.