Antimicrobial treatment

摘要

Preparations used for treating textiles and drilling oil emulsions are prepared by reacting a phenolic compound with paraformaldehyde at 90 DEG to 150 DEG C. in an organic solvent. Examples describe the reaction of paraformaldehyde, in ethylene glycol monopropyl ether as solvent and using NaOH as catalyst, with (a) pentachlorophenol; (b) 2-hydroxy diphenyl; (c) 5,51 - dichloro - 2,21 - dihydroxy - diphenylmethane; (d) 2,3,5,21,31,51-hexachloro -6,61-dihydroxydiphenylmethane; and (e) 4 - hydroxy-diphenylsulphone.ALSO:Drilling oil emulsions are antimicrobially treated with preparations obtained by heating a phenolic compound with paraformaldehyde at 90 DEG to 150 DEG C. in an organic solvent. In an Example (3) a commercial drilling oil prepared from white oil with the addition of olive oil sulphonate and nonyl phenol polyglycol ether are stirred with water to give an emulsion which is subsequently treated with an antimicrobial preparation prepared from pentachlorophenol and paraformaldehyde in ethylene glycol monopropyl ether.ALSO:Textiles are antimicrobially treated with a preparation obtained by heating a phenolic compound with paraformaldehyde at 90 to 150 DEG C in an organic solvent. The treatment is especially suitable for disinfectant dry cleaning and for the bacteriostatic finish of textiles. In Examples (1) fabrics of wool, cotton, poly-acrylonitrile fibres and polyamide fibres are infected with various bacteria and subjected to conventional dry cleaning in the presence of preparations of paraformaldehyde and (a) pentachlorophenol (b) 2-hydroxy-diphenyl (c) 5.5/sv - dichloro - 2,2/sv - dihydroxy - diphenyl-methane (d) 2,3,5,2/sv,3/sv,5/sv - hexachloro - 6.6/sv - dihydroxy - diphenylmethane and (e) 4 - hydroxy diphenylsulphone all prepared in ethylene glycol monopropyl ether and (2) a woollen fabric is treated with the preparation (c) above in an aqueous bath.