Derivatives of 1,3,5-triazacycloheptane-2,4-dione and their use as polymer stabilizers

Claim 1

A compound of formula ##STR16## in which: R 1 , R 12 , which can be the same or different, represent --O, --CN, a hydrogen liner or branched alkyl containing 1 to 20 carbon atoms, an alkynl or alkinyl containing 2 to 20 carbon atoms, benzyl, benzyl substituted by 1 to 3 alkyls containing 1 to 4 carbon atoms, hydroxybenzyl, hydroxybenzyl substituted by 1 to 3 alkyls containing 1 to 4 carbon atoms; a --COR 15 , --COOR 15 or --CONR 15 R 16 radical in which R 15 , R 16 , which can be equal or different, represent a linear or branched alkyl containing 1 to 20 carbon atoms, an alkynl containing 2 to 20 carbon atoms, a cycloalkyl containing 5 to 12 carbon atoms anaralkyl containing, 7 to 12 carbon atoms an aryl containing 7 to 12 carbon atoms, or when bonded to N they can be hydrogen, or together with the N to which they are bonded can form a nitrogenous heterocyclic ring of 5 to 8 terms; or a ##STR17## radical in which R 13 is hydrogen, methyl or phenyl, and R 14 is --OH, --CN, ##STR18## --OR 15 , --COOR 15 , --COR 15 , --OCOR 15 , --CONR 15 R 16 , --OCONR 15 R 16 , --NR 15 R 16 in which R 15 and R 16 are as heretofore defined; R 2 , R 3 , R 6 , R 7 , which can be equal or different, represent an alkyl containing 1 to 6 carbon atoms; R 4 , R 5 , which can be equal or different, represent hydrogen or an alkyl containing 1 to 6 carbon atoms; R 8 , R 9 , R 10 , R 11 , which can be equal or different, represent hydrogen or an alkyl containing 1 to 6 carbon atoms.