Patent GB-344339-A (GB)
Title: Process for the protection of materials from attack by micro-organisms
Filed: 1929-10-24
Abstract: Technical materials, other than foods and pharmaceutical preparations, are protected from attack by micro-organisms such as fungi and bacteria by treatment with a mixture containing a polyhalogenated monocyclic phenol or an alkali compound or an ester thereof, and benzoic acid or a substituted benzoic acid or an alkyl ester or alkali compound thereof.  The mixtures may be added as such to liquid materials to be preserved or may be applied in aqueous solution to solid materials.  Examples specify various mixtures of trichlorophenol, trichlorocresol, tetrachlorophenol, sodium trichlorophenate, 2 : 4 : 5-trichlorophenolacetate (prepared by acetylation of 2 : 4 : 5 trichlorophenol with glacial acid and acetic anhydride), or 2 : 4 : 6 trichlorophenol acetate, with benzoic acid, sodium benzoate salicylic acid, p-hydroxybenzoic acid methyl-ester, or p-hydroxybenzoic acid-n-propyl ester or its sodium salt.  It is stated that the phenols dissolve in water more readily in the presence of the benzoic acid or its compounds.  Specification 331,274, [Class 2 (iii), Dyes &c.], is referred to.ALSO:Printing-roller compositions containing sugar are protected from attack by micro-organisms such as fungi and bacteria by treatment with a mixture containing a polyhalogenated monocyclic phenol or an alkali compound or an ester thereof, and benzoic acid or a substituted benzoic acid or an alkyl ester or alkali compound thereof.  Other active materials such as formaldehyde or substances yielding it, fluorides, and boric acid may also be added.  The mixtures may be added as such to liquid materials to be preserved or may be applied in aqueous solution to solid materials.  Examples specify various mixtures of trichlorophenol, trichlorocresol, tetrachlorophenol, sodium trichlorophenate, 2 : 4 : 5-trichlorophenolacetate (prepared by acetylation of 2 : 4 : 5-trichlorophenol with glacial acetic acid and acetic anhydride), or 2 : 4 : 6-trichlorophenolacetate, with benzoic acid, sodium benzoate salicylic acid, p-hydroxybenzoic acid methyl-ester, or p-hydroxybenzoic acid-n-propyl ester or its sodium salt.ALSO:Technical materials, other than foods and pharmaceutical preparations, are protected from attack by micro-organisms such as fungi and bacteria by treatment with a mixture containing a polyhalogenated monocyclic phenol or an alkali compound or an ester thereof, and benzoic acid or a substituted benzoic acid or an alkyl ester or alkali compound thereof.  Other active materials such as formaldehyde or substances yielding it, fluorides, and boric acid may also be added.  The mixtures may be added as such to liquid materials to be preserved or may be applied in aqueous solution to solid materials.  Examples specify various mixtures of trichlorophenol, trichlorocresol, tetrachlorophenol, sodium trichlorophenate, 2 : 4 : 5-trichlorophenolacetate (prepared by acetylation of 2 : 4 : 5 trichlorophenol with glacial acetic acid and acetic anhydride), or 2 : 4 : 6 trichlorophenol acetate, with benzoic acid, sodium benzoate, salicylic acid, p-hydroxybenzoic acid methylester, or p-hydroxybenzoic acid-n-propyl ester or its sodium salt.  It is stated that the phenols dissolve in water more readily in the presence of the benzoic acid or its compounds.  The application of the preservative mixtures to glue, sizing solutions, photographic gelatine, printing-roller compositions, fabrics, yarns, cork, and vegetable tanning extracts is specified. Specification 331,274, [Class 81 (i), Disinfecting &c.], is referred to.