Abstract: An iodine compound represented by formula (3) and a polymerization inhibitor including the iodine compound, wherein R21 to R25 are as defined herein, X1 is an n1-valent group, and n1 is an integer of 1 to 10:

Abstract: The present invention provides a polyimide compound represented by formula (I): wherein Ar1 is a phenylene group substituted with one or more substituents, or an indolylene group optionally substituted with one or more substituents, Ar2 is a phenylene group substituted with one or more substituents, or an indolylene group optionally substituted with one or more substituents, the substituent is a group selected from a C1-6 alkyl group, a C1-6 alkoxy group, and a halogen atom, A1 is a linear or branched C4-16 perfluoroalkylene group, A2 is an aliphatic or aromatic bisimide-N?,N-diyl, and n1 is any integer.

Abstract: A method for producing a fluorine-containing polymer of the present disclosure includes reacting a polymer comprising a unit represented by the following Formula (I) with a fluorine-containing compound represented by the following Formula (II), to obtain a fluorine-containing polymer comprising a unit represented by the following Formula (III).

Abstract: An igniter is disclosed having a heat generator responsive to an ignition signal for igniting powder. comprises a first connector insulatingly supporting a first pair of electrical conductions having their one ends connected across the heat generator, filter means provided in circuit with one of the first electrical conductors for prohibiting passage of any high frequency signal other than the ignition signal, resilient means electrically connecting the first electrical conductors, the resilient means resiliently contacting at least one of the first electrical conductors, a second connector insulatingly supporting a second pair of electrical conductors having their one ends connected across an ignition signal source, and a second connector adapted to engage the first connector so as to bring the second electrical conductors into electrical connection with the respective first electrical conductors and to take the resilient means out of contact with the first electrical conductor.