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: A polybenzimidazole production method for producing the polybenzimidazole including a repeating unit represented by the following formula (1): wherein Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula (a): two Xs are each individually a hydrogen atom or a monovalent organic group; and R1 is a divalent organic group, the production method including a step (1-1) of polymerizing a tetramine compound and a dicarboxylic acid derivative compound to provide a polybenzimidazole precursor polyamide, and a step (1-2) of dehydrocyclizing the polybenzimidazole precursor polyamide.

Abstract: A compound for use as a cross-linking agent represented by the following formula (1) wherein R1 is —SO2—, —O—, —CO—, an optionally substituted alkylene group, a group represented by the following formula (2) or a single bond; and two As are each independently an aromatic ring group containing a 5- or 6-membered aromatic ring and optionally containing a substituent, where the aromatic ring group contains a substituent in the case where the aromatic ring group is a monocyclic aromatic ring group containing a 6-membered aromatic hydrocarbon ring. Also disclosed is a composition containing the cross-linking agent.

Abstract: A method for producing a polybenzimidazole precursor polyamide including a repeating unit represented by the following formula (2): wherein Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula: two Xs are each individually a monovalent organic group; and R1 is a divalent organic group, the method including: a step (1-1) of polymerizing a tetramine compound (3) and a dicarboxylic acid derivative compound (4) as defined herein to provide the polybenzimidazole precursor polyamide.

Abstract: A polybenzimidazole production method for producing the polybenzimidazole including a repeating unit represented by the following formula (1): wherein Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula (a): two Xs are each individually a hydrogen atom or a monovalent organic group; and R1 is a divalent organic group, the production method including a step (1-1) of polymerizing a tetramine compound and a dicarboxylic acid derivative compound to provide a polybenzimidazole precursor polyamide, and a step (1-2) of dehydrocyclizing the polybenzimidazole precursor polyamide.

Abstract: A fluorine-containing polybenzimidazole containing a repeating unit represented by the following formula (1): wherein Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following: wherein two Xs are each individually a hydrogen atom or a monovalent organic group; and R1 is a divalent organic group. Also disclosed is a polybenzimidazole precursor polyamide, a polybenzimidazole production method, film, flexible wiring board, printed circuit board, and polymer electrolyte membrane.

Abstract: A method for producing a polybenzimidazole precursor polyamide including a repeating unit represented by the following formula (2): wherein Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula: two Xs are each individually a monovalent organic group; and R1 is a divalent organic group, the method including: a step (1-1) of polymerizing a tetramine compound (3) and a dicarboxylic acid derivative compound (4) as defined herein to provide the polybenzimidazole precursor polyamide.

Abstract: A compound of the formula (III): wherein R21 is a hydrogen atom or an alkyl group; R22 is a hydrogen atom or an alkyl group; and R23 is a divalent organic group.

Abstract: The invention provides a novel polymer, a composition, and a molded article. The polymer contains a constitutional unit represented by the following formula (1): wherein X11 and X12 are the same as or different from each other, and are each a hydrogen atom, an alkyl group optionally containing a fluorine atom, or a phenyl group; Y11 is an oxygen atom or a sulfur atom; Rf11 is a hydrogen atom or an alkyl group optionally containing a fluorine atom; and a is an integer of 1 to 4.

Abstract: The present invention provides a compound represented by formula (I) wherein symbols in the formula are as defined in the specification.

Abstract: A silsesquioxane compound represented by the following formula (I): (RaSiO1.5)n, wherein Ra is, each independently at each occurrence, Rb or Rc; provided that at least one Ra is Rb; Rb is —R1—CF2—R2—R3; R1 is a divalent group; R2 is a divalent polymer chain; R3 is a halogen atom or a hydrogen atom; Rc is a hydrogen atom, an alkyl group, a phenyl group, or —(OSiR152)j—R15; R15 is, each independently at each occurrence, a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; j is, each independently at each occurrence, an integer of 1 to 3; and n is an arbitrary integer.

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: A fluorine-containing polybenzimidazole containing a repeating unit represented by the following formula (1): wherein Rf is —SO2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following: wherein two Xs are each individually a hydrogen atom or a monovalent organic group; and R1 is a divalent organic group. Also disclosed is a polybenzimidazole precursor polyamide, a polybenzimidazole production method, film, flexible wiring board, printed circuit board, and polymer electrolyte membrane.

Abstract: The present invention provides a fluorine-containing, silicon-containing compound of formula (I): T1-(A-B)n-T2 which is useful as an additive.

Abstract: A compound of the formula (III): wherein R21 is a hydrogen atom or an alkyl group; R22 is a hydrogen atom or an alkyl group; and R23 is a divalent organic group.

Abstract: The present invention provides a compound of the formula (I): wherein, A is R6(R7)s, N, O, S, or —NR5—; R6 is an s-valent organic group; R7 is each independently, —O—, —S—, —NR5— or —O—P(?O)OR4?—; R2 and R3 are each independently a hydrogen atom or a hydrocarbon group; R4? is each independently, a hydrocarbon group; R5 is each independently, a hydrogen atom or a hydrocarbon group; and s is an integer of 1-10.

Abstract: The invention provides a novel polymer, a composition, and a molded article. The polymer contains a constitutional unit represented by the following formula (1): wherein X11 and X12 are the same as or different from each other, and are each a hydrogen atom, an alkyl group optionally containing a fluorine atom, or a phenyl group; Y11 is an oxygen atom or a sulfur atom; Rf11 is a hydrogen atom or an alkyl group optionally containing a fluorine atom; and a is an integer of 1 to 4.

Abstract: The present invention provides a compound of the formula (I): wherein, R1 is a hydrogen atom or a hydrocarbon group; R2 is —R4—R5; R3 is —R4—R5 or —R4—R6; R4 is a divalent organic group; R5 is OH, SH, COOH or NHR9; R9 is a hydrogen atom or an alkyl group having 1-6 carbon atoms; and R6 is a hydrogen atom or an alkyl group having 1-6 carbon atoms.

Abstract: The present invention provides a fluorine-containing, silicon-containing compound of formula (I): T1-(A-B)n-T2 which is useful as an additive.

Abstract: The present invention aims to provide a heat-curable composition that is capable of providing a cured product having low vapor permeability, a low linear expansion coefficient, and a low refractive index. The present invention relates to a curable composition including a fluorine-containing polymer having a hydroxyl value of 100 mgKOH/g or higher and a refractive index of 1.42 or lower and an epoxy compound.