[CH2:1]=[CH:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH3:10].[F:11][C:12]([C:14]([F:17])([F:16])[F:15])=[CH2:13]>C(OCCCC)(=O)C>[F:11][C:12]([C:14]([F:17])([F:16])[F:15])=[CH2:13].[CH2:1]=[CH:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH3:10]To a 300-mL stainless steel autoclave were added butyl acetate (80 g), 1-decene (15.2 g), and Perbutyl PV (a peroxide radical polymerization initiator produced by NOF Corporation, 0.21 g). The air in the autoclave was substituted with nitrogen and then cooled to 5° C. Subsequently, 2,3,3,3-tetrafluoropropene (18.6 g) was added to the autoclave. The inside of the autoclave was heated to 60° C. with stirring, whereby the reaction was initiated. After the reaction was performed for 16 hours with keeping the temperature in the autoclave at 60° C., temperature and pressure in the autoclave were brought to the ambient temperature and pressure to terminate the polymerization. Thereby, 105.9 g of a butyl acetate solvent of a 2,3,3,3-tetrafluoropropene/1-decene copolymer (solid content concentration: 1.5 mass %) was produced.
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