Patent GB-926308-A (GB)
Title: Detergent compositions and process for treating textiles therewith
IPC: C11D1/22
Filed: 1961-03-03
Abstract: A detergent composition comprises (a) a water soluble condensation product of an aryl sulphonic acid, which may be substituted by amino, hydroxy, nitro, halo, or further sulphonic acid groups in the aryl nucleus, with an aldehyde or ketone, most suitably diphenyl-, dinaphthyl-, or dicresyl-methane disulphonic acids or water soluble, e.g. the sodium, potassium or ammonium salts thereof; (b) a further additional noncationic detergent to (a); and (c) a water soluble organic carboxylic acid having a molecular weight below 300 and being present in sufficient amount to impart a pH of 2-5 to an 0,5% aqueous solution of the composition.  The additional detergent (b) may be a sodium or potassium alkyl-benzene sulphonate or the free acid thereof sodium dialkyl sulphosuccinate, sodium sulphoethylphthalate, sodium-N-oleoyl-p-anisidine sulphonate, sodium alkane sulphonate, sodium diisopropylnaphthalene sulphonate, sodium alkyl sulphate, sodium octylphenoxydiethenoxy sulphate; an ethylene oxide condensates with an alkylphenol, with a fatty alcohol, or with a fatty sorbitan ester; or a fatty monoester of sorbitan or polyglycerol, or a fatty diester of glycol.  Acid (c) should have a pKa value of 5 X 10-2-1 X 10-8, preferably 1 X 10-3-1 X 10-6, and may suitably be acetic, formic, mono- or di-chloracetic, hydroxyacetic, lactic, tartaric, gluconic, oxalic, or (most preferably) citric acid.  In general the proportion by weight of (a) to (c) is 1 : 100 to 6 : 1. Sodium sulphate, sodium and potassium chloride, mono-, di- and tri-sodium phosphate, hexametaphosphate and pyrophosphate, sodium chlorite, lignin sulphonic acid, methylcellulose and those fluorescent brighteners referred to on pages 2909-2922 (Vol. 2) and 3341-3342 (Vol. 3) of the "Colour Index" (1957 Edn.) may also be included.  The compositions are stated to be particularly suitable for use with textiles (see Group IV(c)).ALSO:A detergent composition which is stated to improve the "hand", tensile and tear strength, warmth, flex abrasion resistance and elasticity of textiles washed therewith comprises (a) a water-soluble condensation product of an aryl sulphonic acid which may be substituted by amino, hydroxy, nitro, halo, or further sulphonic acid groups in the aryl nucleus, with an aldehyde or ketone, most suitably diphenyl-, dinaphthyl-, or p dicresyl-methane disulphonic acids or water-soluble, e.g. the sodium, potassium or ammonium, salts thereof; (b) a further additional non-cationic detergent to (a); and (c) a water-soluble organic carboxylic acid having a molecular weight below 300 and being present in sufficient amount to impart a pH of 2-5 to an 0,5% aqueous solution of the composition.  The additional detergent (b) may be a sodium or potassium alkyl-benzene sulphonate or the free acid thereof, sodium dialkyl sulphosuccinate, sodium sulphoethylphthalate, sodium-N-oleoyl-p-anisidine sulphonate, sodium alkane sulphonate, sodium diisopropylnaphthalene sulphonate, sodium alkyl sulphate, sodium octylphenoxydiethenoxy sulphate; an ethylene oxide condensates with an alkylphenol, with a fatty alcohol, or with a fatty sorbitan ester; or a fatty monoester of sorbitan or polyglycerol, or a fatty diester of glycol.  Acid (c) should have a pKa value of 5 X 10-2-1 X 10-8, preferably 1 X 10-3-1 X 10-6, and may suitably be acetic, formic, mono- or di-chloracetic, hydroxyacetic, lactic tartaric, gluconic, oxalic, or (most preferably) citric acid.  In general the proportion by weight of (a) to (c) is 1:100 to 6:1.  Sodium sulphate, sodium and potassium chloride, mono-, di- and tri-sodium phosphate, hexametaphosphate and pyrophosphate, sodium chlorite, lignin sulphonic acid, methylcellulose and those fluorescent brighteners referred to on pages 2909-2922 (Vol. 2) and 3341-3342 (Vol. 3) of the "Colour Index" (1957 Edn.) may also be included. The compositions are of application to textiles of natural or regenerated cellulose, cellulose acetates and ethers, nylon, polyacrylonitrile, polyvinylidene chloride, and polyesters, and particularly to materials containing 40% or more of wool.  In the case of wool it is preferred to use compositions having a pH below the isoelectric point of the wool.  The compositions are generally employed at above 60 DEG C. at a liquor ratio of 10-50:1, condensate (a) comprising 0,01-5% by weight of the dry fabric.