| 摘要 |
The invention relates to a method for modifying acid group containing polymers by reacting, at temperatures of up to 250 °C, a) polymers that contain polymerized into them at least 5 wt.- % of a monomer that contain monoethylenically unsaturated acid groups, that have a molecular weight ranging between 200 to 100.000 and that are obtainable by radical polymerization of monoethylenically unsaturated acids, optionally in the presence of another monoethylenically unsaturated monomer in an aqueous solution in the presence of at least 4 wt.- %, based on the monomers used for the polymerization, of a water-soluble sulfur composition in which the sulfur has the oxidation number +4, with b) unilaterally end-group terminated polyalkylene glycols, alkylpolyalkyene glycolamines or the mixtures thereof. The invention also relates to the mixtures of at least one of said compounds with up to 30 wt.-- %, based on the mixtures, of ammonia, amines, alcohols, hydroxycarboxylic acids or aminocarboxylic acids. |
