3-(DIHYDROBENZOFURAN-5-YL)BENZOFURAN-2-ONE THE USE THEREOF AS SYNTHETIC POLYMER STABILIZER, COMPOSITION FOR SYNTHETIC POLYMER STABILIZATION AND PROCESS OF STABILIZING SYNTHETIC POLYMERS

摘要

3- (Dihydrobenzofuran-5-yl) -benzofuran-2-ones of formula (1) wherein R 2 is 2. to R.sub.10.n. a R.sup.´.n..sub.9.n. have specific meanings. These materials are useful for stabilizing synthetic polymers against oxidative, thermal and light-induced degradation. The invention also relates to compositions for said stabilization and to a method of stabilizing synthetic polymers against said degradation