abstract |
THE INVENTION CONCERNS COMPOUNDS RESPONDING TO THE FORMULA: (CF DRAWING IN BOPI) IN WHICH N 1 OR 2, R MEANS H, ALKYL, ALCOXY OR A HALOGEN, R MEANS H OR ALKYL, R MEANS A DIRECT BOND WHEN N 2 OR A -CO-NR-R GROUP WHEN N 1. THESE COMPOUNDS MAY BE USED AS STABILIZERS OF POLYMERIC MATERIALS AGAINST THE EFFECTS OF LIGHT. |