Alkyl alkanoate derivatives of substituted piperazine-diones and polymer compositions stabilized thereby
US3968078A · kind A · utility
4Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1975 |
| Grant date | Jul 6, 1976 |
| Priority date | — |
| Expiry date | Oct 15, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3462
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.