| 摘要 |
<p>Compounds corresponding to the formula <IMAGE> wherein R1 and R2 represent H or C1-C4-alkyl, R3 represents H or CH3, R4 represents C7-C20-aralkyl, n represents 1 or 2, and m represents an integer of from 1 to 12, are suitable as ageing protecting agents for polymers and in particular for rubbers which are non-extractable in this form and may be added to polymers.</p> |
