Substituted piperazine diones
US4208522A · kind A · utility
6Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1978 |
| Grant date | Jun 17, 1980 |
| Priority date | — |
| Expiry date | Oct 6, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3462
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 ).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.