The invention provides a fluoroethercarboxylic acid which is represented by the general formula (I):
Rf
1
OCHFCF
2
ORf
2
COOM (I)
wherein Rf
1
represents a partially or fully fluorinated alkyl group, which may optionally be interrupted with one or more oxygen atoms, Rf
2
represents a partially or fully fluorinated alkylene group, which may optionally be interrupted with one or more oxygen atoms, and M represents a monovalent alkali metal, NH
4
or H. The fluoroethercarboxylic acid can be suitably used as a surfactant and is low in bioaccumulation. The invention is also a method of fluoropolymer production and an aqueous fluoropolymer dispersion, using the fluoroethercarboxylic acid as a surfactant.
本发明提供一种由通式(I)表示的
氟醚
羧酸:Rf1OCHF
CF2ORf2COOM (I)其中,Rf1表示部分或完
全氟化的烷基,可以选择性地被一个或多个氧原子中断,Rf2表示部分或完
全氟化的亚烷基,可以选择性地被一个或多个氧原子中断,M表示一价的碱
金属、NH4或H。该
氟醚
羧酸可适当用作表面活性剂,并且
生物累积性低。本发明还涉及一种使用该
氟醚
羧酸作为表面活性剂的
氟聚合物生产方法和
水性
氟聚合物分散体。