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AssigneesGunze Limited, Ube Industries, Ltd.
InventorsNaoki Nishiura, Akira Ichino, Takashi Kuraoka, Toru Murakami, Takeshige Nakayama
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The present invention provides a carbon black-dispersed polyamic acid solution composition having a high solids content and a high carbon black content. The invention further provides an intermediate transfer belt using the polyamic acid solution composition. The carbon black-dispersed polyamic acid solution composition is obtained by uniformly dispersing carbon black in a polyamic acid solution obtained by reacting biphenyltetracarboxylic dianhydride and an aromatic diamine in an organic polar solvent. The biphenyltetracarboxylic dianhydride includes 2,3,3′,4′-biphenyltetracarboxylic dianhydride and 3,3′,4,4′-biphenyltetracarboxylic dianhydride. The aromatic diamine includes 4,4′-diaminodiphenyl ether and p-phenylenediamine. The polyamic acid solution has a solids content of 25 weight % or more.
A carbon black-dispersed polyamic acid solution composition comprising a polyamic acid solution and carbon black dispersed therein, the polyamic acid solution being obtained by reacting biphenyltetracarboxylic dianhydride and an aromatic diamine in an organic polar solvent,
A semiconductive polyimide resin belt comprising a polyimide resin and carbon black, the polyimide resin comprising structural units represented by Formulae (1) to (4):
Dependencies are inferred from the claim text.