| abstract |
The present invention relates to absorbents for aqueous acids or lyes comprising cross-linked, polycationic homopolymers and topolymers of quaternized, monoethylenically unsaturated carboxylic acid amino esters and/or carboxylic acid amides of the formula [CH2=C(-R1)-CO-X-(CH2)n-C(-R2, -R3)-CH2-N(-R4,-R5,-R6)](+)Y,(A), wherein R1 represents hydrogen or the methyl group, R2 and R3 represent hydrogen or the same or different alkyl groups having 1 to 4 C-atoms, R4, R5 and R6 represent the same or different alkyl groups having 1 to 4 C-atoms, n stands for 0 or 1, X stands for -O- or -NH-, and Y represents an anionic acid residue. |