Patent GB-467035-A (GB)
Title: Improvements in and relating to cleaning, wetting and dispersing agents and to the production and use thereof
IPC: C07C303/28
Filed: 1935-12-17
Abstract: Ester-sulphonic acids useful as wetting, cleansing and dispersing agents are obtained by treating alkylated or cycloalkylated aromatic or hydroaromatic polysulphonic acids containing at least 13 carbon atoms in the molecule with higher alcohols containing at least ten carbon atoms in insufficient amount for complete esterification.  In examples, dibutylnaphthalene mono sulphonic acid is further sulphonated with chlorsulphonic acid and then partly esterified with olein alcohol, coco fat alcohols and sperm oil alcohols.  The use of polysulphonic acids of the following aromatic and hydroaromatic compounds is mentioned; propylbutylnaphthalene, cyclohexylnaphthalene, cetylbenzene, alkylated and cycloalkylated chlorinated or hydrogenated aromatic hydrocarbons, phenols and hydro phenols.  Wax and naphthenyl alcohols and higher glycols such as that derived from castor oil may be used for the esterification. Phosphorus pentoxide and acetic anhydride or chloride may be used to assist esterification.  Further examples relate to the use of the products in (a) washing wool, and carpet yarn; (b) dyeing half wool with sulphur black; (c) bucking and bleaching loose cotton wool and cotton wool yarn; (d) softening viscose artificial silk goods with whale oil or hydrogenated sperm oil; (e) fulling with dilute sulphuric acid.  The ester-sulphonic acids may be used in the leather industry and in the preparation of cosmetics.  They have a protecting action in both acid and alkaline media, e.g. in dyeing with acid dyes, chrome dyeing, carbonizing, acid fulling, liming skins and hides, dyeing in the presence of sodium sulphide, washing wool, hair, silk, feathers and pelts.  Solvents, fats, fatty acids, mineral oils, fatty alcohols, pigments, and starch may be dispersed for the preparation, e.g. of spinning-greases, drilling-oils, and fat liquors.  The ester sulphonic acids have a softening action upon textiles, leathers, viscose and cellulose artificial silk and may be used in hair washes and sheep dips.ALSO:Ester-sulphonic acids useful as dispersing agents are obtained by treating alkylated or cycloalkylated aromatic or hydroaromatic polysulphonic acids containing at least 13 carbon atoms in the molecule with higher alcohols containing at least ten carbon atoms, in insufficient amount for complete esterification.  In examples, dibutylnaphthalene monosulphonic acid is further sulphonated with chlorsulphonic acid and then partly esterified with olein alcohol, cocofat alcohols and sperm oil alcohols.  The use of polysulphonic acids of the following aromatic and hydroaromatic compounds is mentioned: propylbutylnaphthalene, cyclohexylnaphthalene, cetylbenzene, alkylated and cycloalkylated chlorinated or hydrogenated aromatic hydrocarbons, phenols and hydro-phenols.  Wax and naphthenyl alcohols and higher glycols such as that derived from castor oil may be used for the esterification.  The dispersion of solvents, fats, fatty acids, mineral oils, fatty alcohols pigments and starch is mentioned.