4-Siloxy derivatives of polyalkylated piperidines

Details 4-Siloxy derivatives of polyalkylated piperidines 4-Siloxy derivatives of polyalkylated piperidines

1978-11-17

1980-07-01

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 457PH, 260 4585B, 526265, 528 28, 528 38, 546 14, C07D21146, C07D40112, C07D40114, C08K 554

Patent

active

042105781

ABSTRACT:
4-Siloxy derivatives of sterically hindered piperidines are effective light-stabilizers for plastics. These compounds have at least five alkyl groups in the ring positions 2, 3, 5 and 6 and four alkyl groups in ring positions 2 and 6, preferably methyl and ethyl groups. The ring nitrogen may be unsubstituted or substituted with a monovalent organic residue. The new compounds can be synthesized by O-silylation of 4-hydroxy-polyalkylpiperidines, preferably by reaction with chlorosilanes.

REFERENCES:
patent: 3840494 (1974-10-01), Murayama et al.
patent: 4021432 (1977-05-01), Holt et al.
patent: 4075165 (1978-02-01), Soma et al.
patent: 4116933 (1978-09-01), Ramey et al.
patent: 4131599 (1978-12-01), Brunetti et al.

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