The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2008
Filed:
Aug. 27, 2004
Ryoji Kimura, Saitama, JP;
Hisashi Murase, Saitama, JP;
Masaru Nagahama, Saitama, JP;
Tetsuo Kamimoto, Saitama, JP;
Sinji Nakano, Saitama, JP;
Ryoji Kimura, Saitama, JP;
Hisashi Murase, Saitama, JP;
Masaru Nagahama, Saitama, JP;
Tetsuo Kamimoto, Saitama, JP;
Sinji Nakano, Saitama, JP;
Adeka Corporation, Tokyo, JP;
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.