Acylated derivatives of substituted piperazines and polymeric compositions stabilized thereby
US4007156A · kind A · utility
4Cited by
5References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1975 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | Jun 27, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3465
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Acylated derivatives of substituted piperazines are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds are prepared by the acylation reaction between a substituted piperazine and a mono or di-acid halide, ester or isocyanate. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is 15-stearoyl-7,15-diazadispiro[5,1,5,3]hexadecane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.