Aminoksidgruppe inneholdende maleinsyreanhydridkopolymerer og deres anvendelse som dispergeringsmiddel for pigmenter eller fyllstoffer

摘要

Amine oxide group-containing maleic anhydride copolymers, obtained by reacting at least 1 mol% of the anhydride groups with a primary/tertiary diamine and then oxidizing the tertiary amino groups to form amine oxide groups attached to the polymer chain by half-amide and/or imide groups. Amine oxide group-containing maleic anhydride (MA) copolymers, obtained by (a) reaction of at least 1 mol% of the anhydride groups in MA copolymers with diamines of formula (I), followed by (b) oxidation to form amine oxide groups attached by half-amide and/or imide groups of formula (II) and/or (III). R1 = H or 1-24C hydrocarbyl; R2 = 2-24C alkylene; R3, R4 = 1-12C (preferably 1-6C) aliphatic and/or alicyclic alkyl groups.