Patent ID: 8618321

Claim:
A derivative of tris(2-hydroxyphenyl)methane, wherein the tris(2-hydroxyphenyl)methane derivative has the general formula (I): where the radicals R 1 , R 2 and R have the following meaning: R: are independently of one another, 0 to 4 C 1 - to C 30 -hydrocarbon radicals per phenyl ring, R 1 : is a radical selected from the group consisting of H, OH, F, Cl, Br, I and C 1 - to C 30 -hydrocarbon groups, R 2 : are independently of one another, radicals of the general formula â€”(R 5 â€”Oâ€”) n â€”R 6 â€”X (III), where n is a number from 1 to 50, and where the radicals R 5 , independently of one another, are selected from the group consisting of radicals R 7 , R 8 and R 9 where R 6 , X, R 10 and R 11 , independently of one another, have the following meaning: R 6 : is a single bond or an alkylene group having 1 to 10 carbon atoms which can have optionally functional groups as substituents, X: is H or an acidic group or a radical which comprises at least one OH group, R 10 : is H or a C 1 - to C 6 -hydrocarbon radical, R 11 : is a group â€”(R 5 â€”Oâ€”) m â€”R 6 â€”X, where m is a number from 0 to 50, and where the total number z of all groups R 5 in a radical R 2 is 1 to 50, with the proviso that z is a number from 2 to 50, if at least one X is H.