Patent GB-729032-A (GB)
Title: Improvements in or relating to shaving preparations and after-shave lotions
IPC: A61K8/55
Filed: 1950-11-13
Abstract: In the manufacture of a shaving or after-shave preparation, an anion-active organic derivative of ortho-, pyro-, or a poly-phosphoric acid soluble in water or capable of absorbing water whilst swelling, said derivative including one or more hydrophobic groups and one or more hydrophilic polyhydric alcohol residues, is adjusted to a pH of 3 to 9 by addition of one or more alkalis and/or organic bases.  The hydrophobic group, containing a chain of at least 8 carbon atoms, may be a saturated or unsaturated aliphatic, aliphatic-aromatic, alicyclic or heterocyclic radical, which may be linked to the phosphoric acid directly or through polyhydroxy linkages such as those derivable from sorbitol, erythritol, glycerine, glycol and their polyethers or mixed ethers.  Reference is made in the examples to (a) the secondary ester formed by reacting together molecular proportions of oleylhexaglycol ether, polyglycerine and phosphorus oxychloride; (b) the tertiary ester made by reacting oleyloctaglycol ether and phosphorus oxychloride; (c) the secondary ester formed by reacting molecular proportions of sorbitol mono-oleate, octaglycol and phosphoric acid; and (d) the ester formed by reacting molecular proportions of phosphorus oxychloride, octadecyl alcohol and pentaethylene glycol.ALSO:A shaving or after-shave preparation comprises an anion-active organic derivative of ortho-, pyro- or a poly-phosphoric acid soluble in water or capable of absorbing water whilst swelling, said derivative including one or more hydrophobic groups and one or more hydrophilic polyhydric alcohol residues, and the pH value being adjusted to between 3 and 9 and preferably between 3 and 7 by the addition of one or more alkalis and/or organic bases.  The hydrophobic group (containing a chain of at least 8 carbon atoms) may be a saturated or unsaturated aliphatic, aliphatic-aromatic, alicyclic or heterocyclic radical, which may be linked to the phosphoric acid directly or through polyhydroxy linkages such as those derivable from sorbitol, erythritol, glycerine, glycol, and their polyethers or mixed ethers.  The pH value of the phosphoric acid derivatives may be adjusted by addition of caustic potash solution, caustic soda solution, ammonia, amines, alkylolamines and their derivatives, quaternary ammonium bases and oxyethylated fatty amines.  The preparations may contain mucins, oxyethylated starch, refined petroleum jelly, oils, fats, synthetic surface-active compounds, e.g. sulphated fatty alcohols, oleyl sarcosine and ethylene oxide condensation products of fatty acids, alcohols and acid amides.  Tertiary phosphoric acid esters containing hydrophilic radicals (e.g. polyhydroxy or polyether linkages) may also be incorporated.  The preparations may be used as aqueous solutions, pastes, powders, blocks or bars.  In an example a secondary ester is prepared by reacting 1 molecular proportion of oleyl hexaglycol ether and 1 molecular proportion of polyglycerine with 1 molecular proportion of phosphorus oxychloride, and dissolved in water to give a 20 per cent solution.  The pH is adjusted to between 4 and 5 by addition of triethanolamine.