Substituted piperazine diones

Details Substituted piperazine diones Substituted piperazine diones

Filed on

1978-10-06

Date issued

1980-06-17

Examiner

Tovar, Jose

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Nitrogen attached directly or indirectly to the purine ring...

Other Related Categories

C07D24108

Type

Patent

Status

active

Patent number

042085225

Description

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'-dodecamethylenebis(7,15-diazadispiro[5,1,5,3]hexadecane-14,16-dione ).

REFERENCES:
patent: 3318876 (1967-05-01), Cignarella et al.
patent: 3928357 (1975-12-01), Ramey et al.
patent: 4051137 (1977-09-01), Ramey et al.
patent: 4125517 (1978-11-01), Ramey et al.
patent: 4130711 (1978-12-01), Shier

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