| abstract |
The invention relates to compounds of formula (Ia) or (Ib). In said formulas, A represents an aliphatic, cycloaliphatic, araliphatic or aromatic radical of the value (n + 1) and n is a whole number from 0 to 5, E represents an aliphatic, cycloaliphatic, araliphatic or aromatic radical of the value (m + 1) and m is a whole number from 0 to 3, X stands for -O-, -COO-, or -CHR4-, whereby R4 and R3 together form an ethylene group, R1 and R2 independently of one another represent hydrogen or methyl, R3 represents hydrogen or R3 and R4 together form an ethylene group, and R5 represents a monovalent aliphatic, cycloaliphatic, araliphatic or aromatic radical. The inventive compounds are highly reactive hardening agents for epoxy resins and produce hardened products with improved chemical resistance. |