| 摘要 |
A preservative, for compositions having an aqueous phase, comprising a) 5 to 60% by weight of an organic acid selected from the group consisting of benzoic acid, 4-hydroxybenzoic acid, salicylic acid, formic acid, acetic acid, propionic acid, sorbic acid, undecylenic acid and dehydracetic acid or their mixtures including their sodium, potassium, calcium, magnesium, ammonium and ethanolamine salts b) 10 to 95% by weight of alcohols of the general formulae I, II or III <IMAGE> <IMAGE> <IMAGE> in which R1 denotes hydrogen, an n-alkyl, iso-alkyl or alkoxy radical having 1 to 3 C atoms, and R2 and R3 denote hydrogen or a CH3- or C2H5- radical and n has the value of 3 or 4, and c) 0.1 to 20% by weight of one or more poly(hexa-methylenebiguanide) salts of the general formula <IMAGE> in which Z represents hydrochloride, acetate, lactate, benzoate, propionate, 4-hydroxybenzoate, sorbate or salicylate; and n has the value of 4 to 6, in combination in a customary carrier or solvent.
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