High purity piperazine pyrophosphate and process of producing same
US7449577B2 · kind B2 · utility
9Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2004 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Jul 18, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D295/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides piperazine pyrophosphate represented by chemical formula (I) which has a sodium content of 10 ppm or lower and a process of producing the same. The piperazine pyrophosphate has high purity and provides a flame retardant composition exhibiting excellent flame retardancy. The process includes dehydration condensation of piperazine diphosphate and is able to produce the piperazine pyrophosphate at low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.