Patent ID: 7445645

Claim:
A compound chosen from ortho-substituted and/or meta-substituted N-alkylhydroxylated secondary para-phenylenediamine compounds of formula (I): wherein: R is chosen from linear and branched C 3 -C 10 alkylene radicals, which are optionally substituted with at least one group chosen from amino, monoalkylamino, dialkylamino, alkylcarbonyl, amido, monoalkylaminocarbonyl and dialkylaminocarbonyl groups, wherein the alkylene radicals are interrupted with at least one heteroatom chosen from nitrogen and oxygen, R′ is chosen from alkyl, alkoxy, hydroxyalkoxy, alkoxyalkyl, monohydroxyalkyl and polyhydroxyalkyl radicals and a chlorine atom, and n is an integer from 1 to 4.