Process for preparing dialkylphosphinate and a product thereof
US9802970B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 1, 2014 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Apr 1, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0066
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present provides a process for preparing dialkyl phosphinate, comprising: (1) firstly adding 0-99% of the total weight of phosphinic acids and/or salts thereof and a solvent into a reaction kettle; (2) in the reaction kettle in the presence of alkene and initiator, continuously adding 1-100% of the total weight of the phosphinic acids and/or salts thereof into the reaction system, during the addition process, when the mole contents of monoalkyl phosphinic acids and/or salts thereof account for 10% or less of the total molar contents of phosphorus in the reaction system, stopping adding the phosphinic acids and/or salts thereof. Also providing a dialkyl phosphinate flame retardant prepared by above preparation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.