3,5-Dialkyl-4-hydroxyphenylalkyl substituted piperazine diones a

Details 3,5-Dialkyl-4-hydroxyphenylalkyl substituted piperazine diones a 3,5-Dialkyl-4-hydroxyphenylalkyl substituted piperazine diones a

1976-07-02

1978-01-24

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 458B, 260 4585P, 260 4595H, 260268DK, 260268TR, C08K 534, C08K 513

Patent

active

040703355

ABSTRACT:
3,5-dialkyl-4-hydroxyphenylalkyl 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 3,5-dialkyl-4-hydroxyphenyl-alkyl halide. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is 15-(3',5'-di-t-butyl-4'-hydroxybenzyl)(7,15-diazadispiro[5,1,5,3]hexadecan e-14,16-dione).

REFERENCES:
patent: 3969316 (1976-07-01), Ramey et al.

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