Substituted piperazine dione oxyls and hydroxides and polymer co

Details Substituted piperazine dione oxyls and hydroxides and polymer co Substituted piperazine dione oxyls and hydroxides and polymer co

1973-07-16

1976-02-03

Gallagher, R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252403, 260 458N, C07D24102

Patent

active

039364569

ABSTRACT:
Substituted piperazine dione oxyls and hydroxides are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds may be prepared by first preparing a substituted piperazine dione with subsequent oxidation of the piperazine dione to yield the oxyl and reduction of the oxyl to yield the hydroxide derivative. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is 15-n-octadecyl-7-oxyl-7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione.

REFERENCES:
patent: 3318876 (1967-05-01), Cignarella et al.
patent: 3329645 (1967-07-01), Childers
patent: 3461461 (1969-08-01), Anthony et al.
patent: 3549396 (1970-12-01), Dietz
Yoshioka, et al., Bull. Chem. Soc. Japan 45(6), 1855-1860, (1972).
Duynstee, Recl. Trav. Chim. Pays-Bas 1968, 87(9), 945-956.
Sudo, et al., Bull. Chem. Soc. Japan 36(1), 34-37 (1963).

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