| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject copolymer that is excellent in dissolution properties through an easily controllable radical polymerization technique by copolymerizing a specific fluorine-containing monomer and a cyclic ether with a radical polymerization initiator. SOLUTION: (A) A fluorine-containing monomer of the formula (R<1> is a divalent organic group) as bis(α-trifluoromethyl-β-difluorovinyl) terephthalate and (B) a cyclic ether are copolymerized at an A/B molar ratio of 1/1-1/50 using a radical polymerization initiator as benzoyl peroxide in an amount of 0.1-10 pts.wt. per 100 pts.wt. of the total of the monomers at 0-120 deg.C in an oxygen-excluded atmosphere (for example, in a nitrogen atmosphere) to produce the objective copolymer preferably with a number-average molecular weight of 1,000-100,000.
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