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    • 8. 发明专利
    • BRANCHED POLYESTERS WITH SULFONATE GROUPS
    • CA2836532A1
    • 2012-12-20
    • CA2836532
    • 2012-06-14
    • BASF SE
    • HABERECHT MONIKADETERING JURGENBRUCHMANN BERNDWITTELER HELMUTWEBER HEIKEKOLTER KARL
    • C08G63/688C11D3/37
    • The invention relates to branched polyesters with sulfonate groups. The polyesters can be obtained by reacting the components A, B, optionally C, and optionally D into branched polyesters, wherein the component A is selected from the group consisting of a,ß-olefinically unsaturated dicarboxylic acids, the component B is selected from the group consisting of di- or higher-functional alcohols, the optional component C is selected from the group consisting of di- or higher-functional carboxylic acids and hydroxy carboxylic acids without a,ß-olefinically unsaturated bonds, and the optional component D is selected from the compounds of formula CH3(-O-CH2-CH2)n-OH, with the proviso that if only di-functional alcohols are selected as component B, the component C is present during the reaction and is selected from the group of the tri- or higher-functional carboxylic acids and the tri- or higher-functional hydroxy carboxylic acids without a,ß-olefinically unsaturated bonds. The obtained branched polyesters are subsequently reacted with hydrogen sulfite, the molar quantity of hydrogen sulfite being at most 95 mol% with respect to the quantity of a,ß-olefinically unsaturated dicarboxylic acids.