Patent ID: 7321071

Claim:
A method for producing a water-soluble fluorine-containing vinyl ether which comprises subjecting a fluorine-containing 2-alkoxypropionic acid derivative represented by the following general formula (I): (wherein A represents —OM 1 or —OM 2 1/2 , and M 1 represents an alkali metal and M 2 represents an alkaline earth metal; X represents a halogen atom; Y 1 and Y 2 are the same or different and each represents a fluorine atom, a chlorine atom, a perfluoroalkyl group or a fluorochloroalkyl group; n represents an integer of 0 to 3, and n atoms/groups of Y 1 may be the same or different; m represents an integer of 1 to 5, and m atoms/groups of Y 2 may be the same or different; and Z represents a hydrophilic group) to thermal decomposition at a temperature of not lower than 50° C. but lower than 170° C. in the presence of a coordinating organic solvent comprising one or both of ethyl acetate and tetrahydrofuran to give a water-soluble fluorine-containing vinyl ether represented by the following general formula (II): (wherein Y 1 , y 2 , Z, n and mare as defined above), said coordinating organic solvent having a coordinating property with an ion of said M 1 or an ion of said M 2 and said coordinating organic solvent being in an amount of 10 to 1,000 parts by mass per 100 parts by mass of said fluorine-containing 2-alkoxypropionic acid derivative.