Patent ID: 7671081

Claim:
Compounds of formula (I): where: R 1 represents a direct bond; R 3 , R 4 , R 5 and R 6 are independently selected from hydrogen atoms and substituents α, defined below; R 8 , R 9 , R 10 and R 11 are independently selected from hydrogen atoms, hydroxy groups, C 1 -C 4 alkyl groups, and phenyl groups which are unsubstituted or substituted by at least one substituent selected from the group consisting of C 1 -C 4 alkyl groups and C 1 -C 4 alkoxy groups; or R 9 and R 11 are joined to form a fused ring system with the benzene rings to which they are attached; R 7 represents a direct bond, an oxygen atom or a —CH 2 — group; p is 0 or 1; said substituents α are: a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a C 2 -C 20 alkenyl group, a halogen atom, a nitrile atom, a hydroxyl group, a C 6 -C 10 aryl group, a C 7 -C 13 aralkyl group, a C 6 -C 10 aryloxy group, a C 7 -C 13 aralkyloxy group, a C 8 -C 12 arylalkenyl group, a C 3 -C 8 cycloalkyl group, a carboxy group, a C 2 -C 7 carboxyalkoxy group, a C 2 -C 7 alkoxycarbonyl group, a C 7 -C 13 aryloxycarbonyl group, a C 2 -C 7 alkylcarbonyloxy group, a C 1 -C 6 alkanesulphonyl group, a C 6 -C 10 arenesulphonyl group, a C 1 -C 6 alkanoxyl group or a C 7 -C 11 arylcarbonyl group; n is a number from 1 to 12; R 12 represents a hydrogen atom, a methyl group or an ethyl group, and, when n is greater than 1, the groups or atoms represented by R 12 may the same as or different from each other; A represents a group of formula —[O(CHR 13 CHR 14 ) a ] y —, —[O(CH 2 ) b CO] y —, or —[O(CH 2 ) b CO] (y−1) —[O(CHR 13 CHR 14 ) a ]—, where: one of R 13 and R 14 represents a hydrogen atom and the other represents a hydrogen atom, a methyl group or an ethyl group; a is a number from 1 to 2; b is a number from 4 to 5; Q is selected from the group consisting of ethylene glycol, propylene glycol, butylene glycol, glycerol, trimethylolpropane, di-trimethylolpropane, pentaerythritol and di-pentaerythritol; x is a number greater than 1 but no greater than the number of available hydroxyl groups in Q; y is a number from 1 to 10; and X − represents an anion; and esters thereof.