| abstract |
2-trihalogenomethyl-3-halogeno-4-cyano pyrrole derivatives which arensubstituted in position 5 and optionally in position 1 are used asnbarnaclecide in antifouling paints, which can therefore be formulated asnlight- or bright-coloured, particularly as bright white. n The halogens in positions 2 and 3 are independently selected from thengroup consisting of fluorine, chlorine and bromine, preferably fluorinenin position 2 and bromine in position 3. The substituent in position 5nis selected from the group consisting of C1-8 alkyl, C1-8nmonohalogenoalkyl, C5-6 cycloalkyl, C5-6 monohalogenocycloalkyl, benzyl,nphenyl, mono- and di-halogeno-benzyl or -phenyl, mono- and di-C1-4 alkylnbenzyl or phenyl, and monohalogeno mono-C1-4-alkyl benzyl or phenyl, thenhalogen being selected from the group consisting of chlorine andnbromine, preferably chlorine; the most preferred substituent innposition 5 is para -chlorophenyl. The optional substituent in position 1nis selected from the group consisting of C1-4 alkyl and C1-4 alkoxy C1-4nalkyl; it is preferred that no substituent be present in position 1. n The most preferred compound for use as barnaclecide in the invention isn2-trifluoromethyl-3-bromo-4-cyano-5- para chlorophenyl pyrrole. n Antifouling paints may contain 0.5 to 9.9 wt% of barnaclecide, based onnthe total weight of the dry mass of the composition, preferably 1 to 6nwt%, most preferably 1.5 to 4 wt%. |