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Abstract

Disclosed are compounds of formula (I)

description='In-line Formulae' end='lead'(R¹OOC)_a—R²(OH)_c—COO—(C_nH_2n—O)_m—OC—R³(OH)_d—(COOR⁴)_b  (I)description='In-line Formulae' end='tail'

wherein R¹ and R⁴ independently of one another are hydrogen, a metal cation, an ammonium cation, C₁-C₆-alkyl, cycloalkyl with three to nine ring carbon atoms, aryl with five to ten ring carbon atoms, aryl that is substituted with one or two alkyl groups, aryl that is connected via an alkylene group with the carboxyl group, —(C_nH_2n—O)_m—H or —O—R²(COOR1)_a+1,

R² and R³ independently of one another are aliphatic hydrocarbon residues with one to eight carbon atoms,

a and b independently of one another are integers from 1 to 4,

c is an integer from 0 to 4,

d is an integer from 1 to 4,

n is 2, 3 or 4, and

m is 1, 2, 3 or 4, with the proviso that

R¹ and R⁴ may be different within a molecule within the given definitions.

First Claim