Patent ID: 7347879

Claim:
A sulfur-containing secondary para-phenylene diamine chosen from compounds of formula (I) and the addition salts thereof: wherein: X is chosen from SO 2 and sulfur; if X is SO 2 , R is chosen from linear and branched, saturated and unsaturated C 2 -C 10 alkylene radicals, which are unsubstituted or substituted with a halogen atom or with at least one group chosen from hydroxyl, alkoxy, amino, monoalkylamino, dialkylamino, alkylcarbonyl, carboxyl, amido, alkoxycarbonyl, monoalkylaminocarbonyl, and dialkylaminocarbonyl groups, wherein at least one carbon atom of the alkylene radical is optionally replaced with at least one entity chosen from carbonyl functional groups and heteroatoms chosen from oxygen, nitrogen, and sulfur; if X is sulfur, R is chosen from branched, saturated, and unsaturated C 1 -C 10 alkylene radicals, which are unsubstituted or substituted with a halogen atom or with at least one group chosen from hydroxyl, alkoxy, amino, monoalkylamino, dialkylamino, alkylcarbonyl, carboxyl, amido, alkoxycarbonyl, monoalkylaminocarbonyl, and dialkylaminocarbonyl groups, wherein at least one carbon atom of the alkylene radical is optionally replaced with at least one entity chosen from carbonyl functional groups and heteroatoms chosen from oxygen, nitrogen, and sulfur; R 1 is chosen from amino radicals, aryl radicals, and linear and branched, saturated and unsaturated C 1 -C 10 alkyl radicals, which are unsubstituted or substituted with a halogen atom or with at least one group chosen from hydroxyl, alkoxy, amino, monoalkylamino, dialkylamino, alkylcarbonyl, carboxyl, amido, alkoxycarbonyl, monoalkylaminocarbonyl, and dialkylaminocarbonyl groups, and saturated and unsaturated 5- or 6-atom heterocycles, wherein at least one carbon atom of the alkyl radical is optionally replaced with at least one entity chosen from carbonyl functional groups and heteroatoms chosen from oxygen, nitrogen, and sulfur; R 2 is chosen from hydrogen, halogen atoms, and radicals chosen from alkyl, alkoxy, alkoxyalkyl, hydroxyalkoxy, monohydroxyalkyl, and polyhydroxyalkyl; and n is an integer ranging from 1 to 4; with the proviso that the compound of formula (I) is not: 2-(4-Amino-3-methylphenylamino)ethanesulfonamide, 2-(4-Aminophenylamino)ethanesulfonic acid diethylamide, N-[2-(4-Amino-2-methylphenylamino)ethyl]methanesulfonamide, N-[2-(4-Aminophenylamino)ethyl]methanesulfonamide, 2-[3-(4-Aminophenylamino)propane-1-sulfonyl]ethanol, N-[3-(Butane-1-sulfonyl)propyl]benzene-1,4-diamine, N-[2-(4-Amino-3-methylphenylamino)ethyl]methanesulfonamide, N-[2-(4-Amino-2-methylphenylamino)ethyl]-N-ethylmethanesulfonamide [2-(4-Amino-3-methylphenylamino)ethyl]sulfamic acid, N-[2-(4-Amino-2-chlorophenylamino)ethyl]methanesulfonamide, or N-[3-(4-Aminophenylamino)propyl-3-oxo]benzenesulfonamide.