Patent ID: 6974497

Claim:
A compound or a mixture of compounds of the formula (I) where R 1 is where X is a chlorine or fluorine atom, and R 2 is hydrogen; a C 1-2 -alkyl radical or a C 1-2 -alkyl which is substituted by one or more radicals from the group —OH, —NH 2 or —COOH, R 3 is a C 5-6 -cycloalkyl radical; a C 1-2 -alkyl which is substituted by one or more radicals from the group —OH, —NH 2 , —COOH and —SO 3 H; -A-SO 2 —B: where A is a C 2-4 -alkylene group; a C 2-4 -alkylene group which may be interrupted by one or more heteroatoms elected from the group consisting of —O—, —NR 4 — and —SO 2 — or a phenylene group; wherein R 4 is as defined below; B is —CH═CH 2 or —CH 2 —CH 2 -Z, where Z is any group that is detachable by alkali; R 4 is hydrogen or a C 1-4 -alkyl radical; or R 2 and R 3 may be combined with the nitrogen atom to which they are bonded to form a hetero ring of 6 atoms in which an additional heteroatom from the group consisting of O, N and S may be incorporated.