Patent GB-466734-A (GB)
Title: Improvements in processes for the treatment of textiles
IPC: D03D49/24
Filed: 1936-06-08
Abstract: Textile assistants suitable for adding to aqueous textile treating baths comprise disulphonium compounds having the formula <FORM:0466734/IV/1> in which R is an aliphatic radicle containing at least ten carbon atoms, R1 methyl, ethyl or benzyl and Ac an acid anion such as Cl, NO3, CH3COO or \ba1/2\beSO4.  The disulphonium compounds which are semi solid resinous substances have a wetting, foaming and emulsifying effect and dyeings on cellulose with substantive dyestuffs are improved as regards fastness to water, perspiration and washing.  The fastness is improved by a subsequent treatment with formaldehyde.  The resistance of wool, dyed with acid dyestuffs to alkaline fulling is increased.  The disulphonium compounds may also be used as reserves in dyeing silk and wool.  They may be prepared from the disulphides by the addition of such compounds as dimethylsulphate, benzyl chloride, chloracetone or w-bromacetophenone.  Disulphides may be obtained from olein alcohol by treatment with hydrobromic acid followed by heating with alcoholic hydrosulphide or or by heating a chlorinated paraffin wax with alcoholic sodium sulphide.  The Specification as open to inspection under Sect. 91 comprises also the manufacture and use of sulphonium compounds having the formula R1.R2.R3.SAc where R1, R2 and R3 stand for open or cyclic organic radicles which may be interrupted by sulphur, nitrogen or oxygen atoms, and where R1 and R2 together with the sulphur atom may form a heterocyclic ring.  The following sulphides, by treatment with e.g. dimethylsulphate yield sulphonium salts; octadecylmethylsulphide, didodecylsulphide, thiodiglycollic acid didodecylester, benzyletherthioglycollic acid dodecylester, p - nitrophenylcetylsulphide, p - octadecenylamidobenzylmethylsulphide and oleylamidoethylmethylsulphide.  Dimethyl-N-dimethyl stearyl amidosulphonium methosulphate is obtained by treating with dimethyl sulphate the amide of thiostearic acid which is prepared from oleic acid by treating with hydrobromic acid and potassium hydrosulphide. Aromatic sulphonium compounds, e.g. trihydroxy phenylsulphonium hydroxide are obtained by treating phenols or naphthols with the corresponding sulphoxides or with thionylchloride.  Sulphonium compounds containing sulphonic or carboxylic groups are stated to have detergent properties.  This subject-matter does not appear in the Specification as accepted.ALSO:Compounds having the following formula are stated to have emulsifying properties (R1)2S.(Ac)--R--S.(Ac)(R1)2 where R is an aliphatic radicle containing at least ten carbon atoms, R1, methyl, ethyl or benzyl and Ac an acid anion such as Cl, NO3, CH3COO or \ba1/2\beH2SO4.  They may be prepared from the corresponding disulphides by the addition of such compounds as dimethylsulphate, benzyl chloride, chloracetone or o -bromacetophenone, Disulphides may be obtained from olein alcohol by treatment with hydrobromic acid and alcoholic hydrosulphide or by treating a chlorinated paraffin wax with alcoholic sodium sulphide. The Specification as open to inspection under Sect. 91 comprises also the manufacture and use of sulphonium compounds having the formula R1.R2.R3.SAc where R1, R2 an R3 stand for open or cyclic organic radicles which may be interrupted by sulphur, nitrogen or oxygen atoms and where R1 and R2 together with the sulphur atom may form a heterocyclic ring.  The following sulphides, by treatment with, e.g. dimethylsulphate yield sulphonium compounds: octadecylmethylsulphide, didodecylsulphide, thiodiglycollic acid didodecyl ester, benzyletherthioglycollic acid dodecylester, p-nitrophenylcetylsulphide, p-octadecenylamido benzylmethylsulphide and oleylamidoethylmethyl sulphide. Dimethyl - N - dimethylstearylamidosulphonium methosulphate and aromatic sulphonium compounds such as trihydroxyphenylsulphonium hydroxide are mentioned. This subject-matter does not appear in the Specification as accepted.