Patent GB-940379-A (GB)
Title: Preservative compositions containing ªÐ-hydroxybenzoic acid esters
IPC: A23C19/10
Filed: 1960-04-11
Abstract: A liquid preservative composition comprises a homogeneous mixture of two or more p-hydroxybenzoic acid esters or one or more p-hydroxybenzoic acid esters and one or more of the substances 2-methyl-1 : 4-naphthaquinone, dehydroacetic acid, salicylic acid, sorbic acid, butyl hydroxyanisole, butyl hydroxytoluene, 2 : 4 : 5 - trichlorophenol, 2 : 4 : 6 - trichlorophenol, pentachlorophenol, n-propyl gallate and isoamyl gallate, the constituents being employed in such proportions that the homogeneous mixture is liquid at room temperature.  The compositions may be emulsified in water or dispersed in aqueous solution containing colloid protecting substances e.g. gelatin or carboxymethylcellulose.  The compositions are miscible with Nisin and 5-nitro-2-furfural semi-carbazone.  The compositions are formed by (a) melting the constituents together, (b) triturating a mixture of the constituents or (c) dissolving the constituents in an organic solvent and evaporating the solvent.ALSO:Wrapping materials, e.g. regenerated cellulose sheeting, parchment paper or polyethylene film are coated with a liquid film of a preservative composition comprising a homogeneous mixture of two or more p-hydroxybenzoic acid esters or one or more p-hydroxybenzoic acid esters and one or more of the substances 2-methyl-1:4 - napthaquinone, dehydroacetic acid, salicyclic acid, sorbic acid, butyl hydroxyanisole, butyl hydroxytoluene, 2:4:5-trichlorophenol, 2:4:6-trichlorophenol, pentachlorophenol, n-propyl gallate and iso-amyl gallate, the constituents being employed in such proportions that the homogeneous mixture is liquid at room temperature.  The composition when used may be emulsified in water or disposed in aqueous solution containing colloid protecting substances e.g. gelatin or carboxy methyl cellulose.ALSO:Wrapping materials e.g. parchment paper, regenerated cellulose sheeting or cotton cloth are preserved from attack by bacteria by impregnation with a composition comprising a homogeneous mixture of two or more p-hydroxy benzoic acid esters or one or more p-hydroxybenzoic acid esters and one or more of the substances 2-methyl-1:4-naphthaquinone, dehydroacetic acid, salicylic acid, sorbic acid, butyl hydroxyanisole butyl hydroxy toluene, 2:4:5-trichlorophenol, 2:4:6-trichlorolphenol, pentachlorophenol, n-propyl gallate and iso-amyl gallate the constituents being employed in such proportions that the homogeneous mixture is liquid at room temperature.  The compositions when used may be emulsified in water or dispersed in aqueous solution containing colloid protecting substances e.g. gelatin or carboxy-methyl cellulose.ALSO:Foods, e.g. soy sauce, apple juice, tangerines, cheese, are treated with, or wrapping materials for the foods, are impregnated or coated with, a fungicidal preservative mixture of two or more p-hydroxybenzoic acid esters or one or more p-hydroxybenzoic acid esters and one or more of the substances 2-methyl 1:4-naphthaquinone, dehydra-acetic acid, saticylic acid, sorbic acid, butyl hydroxyanisole, butyl hydroxytoluene, 2:4:5-trichlorophenol, 2:4:6-trichlorophenol, pentachlorophenol, n-propyl gallate and iso-amyl gallate, the constituents being employed in such proportions that the homogeneous mixture is liquid at room temperature.  The compositions may be emulsified with water or dispersed in aqueous solution containing colloid protecting substances e.g. gelatin or carboxymethylcellulose. The compositions may also contain nisin or 5-nitro-2-furfural-semi-carbazone.