| abstract |
The present invention relates to a dispersing agent for pigments or extenders which is obtainable by salt formation from an amine-functional compound by means of an acid, wherein a polyamine which contains at least three amino groups and which is from the group comprising aliphatic linear polyamines and/or aliphatic branched polyamines and/or modified polyamines, with the proviso that after modification three amino groups which can be converted into salts are still present per molecule, or a mixture of polyamines such as these, is used as the amine-functional compound, and wherein a substance from the group comprising phosphoric acid esters of general formula: (HO)3-nPO(OR1)n where n=1 or 2, sulphonic acids of general formula HOSO2R2 and acidic sulphuric acid esters of general formula HOSO3R2 is used as the acid, wherein R1 and R2 represent an alkyl, aryl or aralkyl radical containing at least 5 C atoms and/or a radical of an oxyalkylated alcohol with a number average molecular weight between 100 and 5000 g/mole and/or a radical containing at least one carboxylic acid ester group and/or a urethane group with a number average molecular weight between 100 and 5000 g/mole, or a mixture of substances such as these, wherein R1 and R2 can be the same or different. The invention also relates to the use of the dispersing agent and to a method of producing it. |