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AssigneeAsahi Glass Company, Limited
InventorsKimiaki Kashiwagi, Gen Ogawa, Takashi Okazoe, Kunio Watanabe, Eisuke Murotani, Kazuya Oharu
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A novel fluoropolymer which can be an optical resin material having a low refractive index and excellent heat resistance, and a novel fluorinated diene compound having two unsaturated bonds, capable of presenting such a fluoropolymer, are presented. Further, by virtue of the low refractive index and excellent heat resistance, the polymer presents a high performance optical transmitter and a plastic optical fiber. A fluorinated diene compound represented by CF2═CFCF(ORf)CF2OCF═CF2 (wherein Rf is a perfluoroalkyl group such as a trifluoromethyl group), and a fluoropolymer thereof. Further, an optical transmitter made by using such a fluoropolymer, and a plastic optical fiber having a core comprising such a fluoropolymer and a fluorinated low molecular compound contained therein as a refractive index-increasing agent.
A fluorinated diene compound represented by the following formula (1):
A method for producing a fluorinated diene compound represented by the following formula (1), characterized in that a dehalogenation reaction is carried out at halogen atoms other than fluorine atoms in at least one compound selected from a compound represented by the following formula (2) and a compound represented by the following formula (3):
A fluoropolymer comprising monomer units formed by cyclopolymerization of a fluorinated diene compound represented by the formula (1), or monomer units formed by cyclopolymerization of a fluorinated diene compound represented by the formula (1) and monomer units formed by polymerization of other monomer polymerizable with the fluorinated diene compound represented by the formula (1):
Dependencies are inferred from the claim text.