Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-10-15
1976-07-06
Rollins, Alton D.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260268TR, 260268DK, C07D24108, C08K 534
Patent
active
039680789
ABSTRACT:
Alkyl alkanoate derivatives of substituted piperazinediones are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds may be formed by reacting a substituted piperazinedione with an acrylate or a crotonate, or reacting the alkali or alkaline earth salt of a substituted piperazine dione with a haloalkanoate. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is n-octadecyl-.beta.-(15{7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione}pr opionate.
REFERENCES:
patent: 3920659 (1975-11-01), Ramey et al.
Luzzi John J.
Ramey Chester E.
Ciba-Geigy Corporation
Rollins Alton D.
Tovar Jose
Vanecek Charles W.
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