There are disclosed a phosphorus-containing carboxylic acid derivative which has a group containing phosphorus atom and has in its molecule, a group represented by the following formula (1):
1
wherein R
1
, R
2
and R
3
are each hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms, and Y is oxygen atom or sulfur atom; a process for producing the derivative; and a flame retardant comprising the foregoing derivative as an effective ingredient. The present invention can provide the phosphorus-containing carboxylic acid derivative and a flame retardant which are each excellent in solubility in an organic solvent, compatibility with a variety of resins, stability and flame retardancy.
本发明公开了一种含
磷羧酸衍
生物,该衍
生物具有含
磷原子的基团,其分子中具有由下式(1)表示的基团:
1
其中 R
1
, R
2
和 R
3
均为氢原子或具有 1 至 18 个碳原子的烃基,Y 为氧原子或
硫原子;生产该衍
生物的工艺;以及包含上述衍
生物作为有效成分的阻燃剂。本发明所提供的含
磷羧酸衍
生物和阻燃剂在有机溶剂中的溶解性、与各种
树脂的相容性、稳定性和阻燃性都非常好。