| 摘要 |
The invention relates to compounds of formula (Ia) or (Ib). In said formulas , A represents an aliphatic, cycloaliphatic, araliphatic or aromatic radical o f 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 o f one another represent hydrogen or methyl, R3 represents hydrogen or R3 and R 4 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.
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