申请人:DAIHACHI CHEMICAL INDUSTRY CO., LTD.
公开号:EP0690063A1
公开(公告)日:1996-01-03
A purification method of a phosphoric ester, which comprises treating a crude phosphoric ester with an epoxy compound, heating the resultant in the presence of water, washing the resultant with water, and removing the residual water. The obtained phosphoric esters have low acid value and are excellent in physical properties such as heat resistance, resistance to hydrolysis and storage stability, and are useful as plasticizers and/or flame-retardants.
一种磷酸酯的提纯方法,包括用环氧化合物处理粗磷酸酯,在有水的情况下加热所得产物,用水洗涤所得产物,然后除去残留的水。得到的磷酸酯酸值低,物理性能优异,如耐热性、抗水解性和储存稳定性,可用作增塑剂和/或阻燃剂。