Patent ID: 8864851

Claim:
A composition comprising: (a) one or more components selected in the group consisting of: mixtures of compounds having formula (I) NR 1 R 2 R 3 and compounds having formula (II) wherein R 1 , R 2 and R 3 , independently of each other, are selected in the group consisting of C 1 -C 6 linear or branched alkyl groups, C 3 -C 6 cycloalkyl groups, C 1 -C 6 linear or branched hydroxyalkyl groups, C 3 -C 6 hydroxycycloalkyl groups, C 1 -C 6 linear or branched alkoxyl groups; and wherein at least one among R 1 , R 2 and R 3 is a C 1 -C 6 linear or branched hydroxyalkyl group; R 4 , R 5 , R 6 , R 7 , independently of each other, are selected in the group consisting of H, C 1 -C 6 linear or branched alkyl groups, C 3 -C 6 cycloalkyl groups, C 1 -C 6 linear or branched hydroxyalkyl groups, C 3 -C 6 hydroxycycloalkyl groups; and X is selected in the group consisting of hydrogen, alkaline metals, alkaline-earth metals, ammonium or ammonium derived from a compound of formula (I); compounds of formula (III) wherein R 4 , R 5 , R 6 , R 7 , are as above defined and X′ is an ammonium derivative of a compound of formula (I); and mixtures thereof; and (b) one or more components selected among the compounds of formula (IV) wherein R 8 is selected in the group consisting of hydroxyl groups and halogen atoms; R 9 is selected in the group consisting of hydroxyl groups and aniline groups; R 10 is a phenyl group; wherein the weight quantity of the compound of formula (IV) is between 0.1 ppm and 50 ppm with respect to the sum of the weights of the compounds of formula (I), (II) and (III).