DERIVES DE 2,2,6,6-TETRAMETHYLPYPERIDINE ET PROCEDE DE PREPARATION

DERIVES DE 2,2,6,6-TETRAMETHYLPYPERIDINE ET PROCEDE DE PREPARATION

Derivs. of 2,2,6,6-tetra:methyl-piperidine, used as thermal and light-stabilisers for polymers of general formula (I) and of solid, white crystalline appearance are prepd. by transesterification of phenolic-acid-methyl-esters into corresponding o-benzylates with yl 4 2,2,6,6-tetra:meth-piperidine-ol...

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Bibliographische Detailangaben
Hauptverfasser: DRAGUTAN ILEANA,RO, ANDREI CONSTANTIN,RO, DRAGUTAN VALERIAN,RO
Format: Patent
Sprache:fre ; rum
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:Derivs. of 2,2,6,6-tetra:methyl-piperidine, used as thermal and light-stabilisers for polymers of general formula (I) and of solid, white crystalline appearance are prepd. by transesterification of phenolic-acid-methyl-esters into corresponding o-benzylates with yl 4 2,2,6,6-tetra:meth-piperidine-ol followed by hydrogenolysis for the removal of benzyl gps.