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AssigneeCiba-Geigy Corporation
InventorsBernardo de Sousa, Rene Muntwyler, Werner Schmid
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A method of protecting keratinous material, especially wool, from attack by insects that feed on keratin, which comprises treating said material with compounds of the formula ##STR1## wherein X is oxygen or sulfur, each of R.sub.1 and R.sub.2 independently is alkyl, alkenyl, benzyl or unsubstituted or substituted phenyl, R.sub.3 is halogen, nitro or trihalomethyl, R.sub.4 is hydrogen, halogen or trihalomethyl, and R.sub.5 is hydrogen, halogen, methyl or methoxy. The invention also provides novel compounds of the formula (1) wherein at least one of R.sub.1 and R.sub.2 is phenyl or substituted phenyl and X is oxygen as well as compositions containing the compounds of the formula (1) and compositions which, in addition to the compounds of formula (1), also contain synthetic pyrethroids, esters of .alpha.-alkyl-substituted phenylacetic acids or substituted sulfanilides.
A method of protecting keratinous material from attack by insects that feed on keratin and from feeding damage, which comprises treating said material with compounds of the formula ##STR126## or with tautomeric forms and salts thereof, wherein X is oxygen or sulfur, each of R.sub.1 and R.sub.2 independently is alkyl of 1 to 4 carbon atoms, alkenyl of 3 or 4 carbon atoms, benzyl, phenyl or phenyl substituted by alkyl or alkoxy, each of 1 to 4 carbon atoms, chlorine, bromine, fluorine, nitro or trihalomethyl, but at most 1 nitro and at most 2 trihalomethyl and alkoxy, R.sub.3 is halogen, nitro or trihalomethyl, R.sub.4 is hydrogen, halogen or trihalomethyl, and R.sub.5 is hydrogen, halogen, methyl or methoxy.
Dependencies are inferred from the claim text.