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AssigneeJapan Science and Technology Corporation
InventorsKazuaki Ishihara, Hisashi Yamamoto
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This invention provides processes of the preparation of polyamides, polyimides, and polyamideimides, which are easy to purify after reactions, from polycarboxylic acids and polyamines in high yield without side reactions such as a change of color to black by direct polycondensation reaction with heat, especially processes of preparing aromatic polyamides (aramids), aromatic polyimides, and aromatic polyamideimides, which are difficult to synthesize in direct polycondensation reaction. Polyamides, polymides, and polyamideimides are prepared in high yield by the polycondensation of aromatic dicarboxylic acids, aromatic tetracarboxylic acids or aromatic tricarboxylic acids and aromatic diamines, using arylboric acids such as 3,4,5-trifluorophenylboric acids as polycondensation catalysts, in a mixed solvent of pentamethylbenzene and N-methylpyrrolidinone or a mixed solvent of m-terphenyl and N-butylpyrrolidinone.
A process of preparation of a condensed polymer by reacting a polycarboxylic acid and a polyamine, a polycarboxylic acid, a polyamine and an aminocarboxylic acid, or an aminocarboxylic acid in the presence of a polycondensation catalyst and a solvent, wherein an arylboric cid is used as the polycondensation catalyst.
A process of preparation of a condensed polymer by reacting a polycarboxylic acid and a polyamine, a polycarboxylic acid, a polyamine and an aminocarboxylic acid, or an aminocarboxylic acid, in the presence of a polycondensation catalyst and a solvent, wherein a solvent containing pentamethylbenzene is used as the polycondensation solvent.
A polyamide compound prepared by polycondensation of an aromatic dicarboxylic acid and an aromatic diamine in the presence of an arylboric acid as a polycondensation catalyst and a mixed solvent of pentamethylbenzene and N-methylpyrrolidinone.
A polyimide compound prepared by polycondensation of an aromatic tetracarboxylic acid and an aromatic diamine in the presence of an arylboric acid as a polycondensation catalyst and a mixed solvent of pentamethylbenzene and N-methylpyrrolidinone.
A polyamideimide compound prepared by polycondensation of an aromatic tricarboxylic acid and an aromatic diamine in the presence of an arylboric acid as a polycondensation catalyst and a mixed solvent of pentamethylbenzene and N-methylpyrrolidinone.
A process of preparation of a condensed polymer by reacting a polycarboxylic acid and a polyamine, a polycarboxylic acid, and a polyamine and an aminocarboxylic acid, or an aminocarboxylic acid in the presence of a polycondensation catalyst and a solvent containing m-terphenyl is used as the solvent.
A polyamide compound prepared by polycondensation of an aromatic dicarboxylic acid and an aromatic diamine in the presence of an arylboric acid as a polycondensation catalyst and a mixed solvent of m-terphenyl and N-butylpyrrolidinone.
A polyimide compound prepared by polycondensation of an aromatic tetracarboxylic acid and an aromatic diamine in the presence of an arylboric acid as a polycondensation catalyst and a mixed solvent of m-terphenyl and N-butylpyrrolidinone.
A polyamideimide compound prepared by polycondensation of an aromatic tricarboxylic acid and an aromatic diamine in the presence of an arylboric acid as a polycondensation catalyst and a mixed solvent of m-terphenyl and N-butylpyrrolidinone.
Dependencies are inferred from the claim text.