Substituted piperazine diones and polymeric compositions stabili

Details Substituted piperazine diones and polymeric compositions stabili Substituted piperazine diones and polymeric compositions stabili

1977-09-22

1978-11-14

Tovar, Jose

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

544344, 544349, 544357, 544385, C07D24108

Patent

active

041255178

ABSTRACT:
Substituted piperazine diones are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds are prepared by the alkylation reaction between a substituted piperazine dione and an organic halide. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is 15,15'-dodecamethylene-bis(7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dion e).

REFERENCES:
patent: 3928357 (1975-12-01), Ramey et al.
patent: 4051137 (1977-09-01), Ramey et al.

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