| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a fluorine-containing copolymer excellent in light transmission and heat discoloring resistance it for a long time in a high temperature. SOLUTION: This method for producing the fluorine-containing copolymer by performing a radical copolymerization reaction of at least 2 kinds of fluorine- containing monomers is provided by heating a halogenated fluoroalkyl compound and a polymerization initiator which can transfer a radical to the fluoroalkyl compound at 40-100°C in an aqueous medium, then adding fluorine-containing monomers in the reaction system and forming the fluorine-containing copolymer. Since the fluorine-containing copolymer is excellent in heat yellowing resistance, the coloration is extremely little and also since it is excellent in light transmission, it is suitably used as a molding material for various members in fields such as semiconductor and electric/electronic fields. COPYRIGHT: (C)2003,JPO |
