Process for preparing 1-oxa-3,8-diaza-4-oxo-spiro-[4,5]-decanes
1-Oxa-3,8-diaza-4-oxo-spiro-[4,5]-decane compounds of the formula STR1 are new light stabilizers for protecting polymers from the damaging effect of UV radiation.
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(2008/06/13)
Poly-bis-triazinylimides, their preparation
Poly-bis-triazinylimides of the formula STR1 are prepared from bis-(2,4-dichloro-1,3,5-triazin-6-yl)imides and polyalkylpiperidylamines. They are used as light stabilizers for polymers.