Substituted piperazines and polymeric compositions stabilized th

Details Substituted piperazines and polymeric compositions stabilized th Substituted piperazines and polymeric compositions stabilized th

1975-06-27

1977-02-08

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260268TR, 260268R, C07D24138

Patent

active

040071570

ABSTRACT:
Substituted piperazines 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 followed by reduction with lithium aluminum hydride. Polymeric compsitions 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).

REFERENCES:
patent: 3318876 (1967-05-01), Cignarella et al.
patent: 3920659 (1975-11-01), Ramey et al.

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