Canon Kabushiki Kaisha

Kei Tagami

Kunihiko Sekido

Masashi Nishi

Michiyo Sekiya

Hiroki Ohrui

Masumi Itabashi

Akihito Saitoh

Ryuji Ishii

Hironobu Iwawaki

Masanori Muratsubaki

Tetsuo Takahashi

Kenichi Ikari

Terunobu Saitoh

Yuki Yamamoto

Naoki Yamada

Yojiro Matsuda

Satoru Shiobara

Yota Ito

Mizuho Hiraoka

Tomona Yamaguchi

Isao Kawata

Yuto Ito

Haruna Iida

Kouichi Yonetani

Kumiko Yashima

A cured product of a resin composition. The resin composition comprises a compound represented by the following formula (1): Rto Rare each independently selected from a polymerizable functional group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkyl group having a polymerizable functional group at a terminal thereof which may contain an oxygen or sulfur atom replacing one CHin a main chain of the alkyl group. Rto Rare each independently selected from a hydrogen atom and a trifluoromethyl group. However, at least one of Rto Ris a polymerizable functional group or a substituent having a polymerizable functional group, and at least one of Rto Ris a trifluoromethyl group.

Cured product, optical element, optical apparatus, and imaging apparatus

Provided is a cured product of a resin composition including a (meth)acrylate compound and a compound having at least one thiol group, wherein the content of the compound having at least one thiol group in the cured product is 30 mass % or less, and wherein the cured product has a secondary dispersion characteristic of 0.65 or more.

Cured product, optical element, optical apparatus, and image pickup apparatus

The compound having a high refractive index characteristic and a high transmittance is a (meth)acrylate compound represented by the following general formula (1): in the general formula (1), X represents a phenylene group, Zto Zare selected from the group consisting of a phenyl group, a heteroaryl group, a phenylene group, a heteroarylene group, a phenylalkylene group having an alkylene group having 1 or more to 4 or less carbon atoms, and a heteroaralkylene group having an alkylene group having 1 or more to 4 or less carbon atoms, Pto Pare selected from the group consisting of an acryloyloxy group and a methacryloyloxy group, A is selected from the group consisting of an aryl group, a heteroaryl group, an arylene group, and a heteroarylene group, and 'm' and “n” each represent 0 or 1, provided that when the “m” represents 0, the “n” represents 0.

(Meth)acrylate compound

The triarylamine compound is represented by the following general formula (1), and the material, the optical element, and the optical apparatus each include a polymerized product (cured product) of the triarylamine compound. (In the general formula (1), Rand Rare each independently selected from a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and a substituted or unsubstituted alkylene group having 1 to 8 carbon atoms, the alkylene group having a polymerizable functional group, and Rto Rare each independently selected from a hydrogen atom, a cyano group, a trifluoromethyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkylene group having a polymerizable functional group, and a polymerizable functional group, provided that at least one of Rto Rrepresents an electron-withdrawing group, and at least one of Rto Rhas a polymerizable functional group.)

Optical element, material, optical apparatus and compound

Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level Tof 1.8 eV or more; the hole transport material has a hole mobility of 1&#xd7;10cm/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1):|reduction potential of hole transport material|&#x2212;|reduction potential of host|&#x3e;0.1 V&#x2003;&#x2003;(1)and the following expression (2):|HOMO level of hole transport material&#x2212;HOMO level of host|&#x3c;0.1 eV&#x2003;&#x2003;(2).

Organic light emitting element

Provided is an organic light emitting device having high emission efficiency and a long continuous driving lifetime. The organic light emitting device includes: an anode; a cathode; and an emitting layer placed between the anode and the cathode, in which: the emitting layer contains an emitting material that emits fluorescence; and in an emission wavelength region of the emitting material, an absorption peak of an absorption spectrum in a minimum excited triplet state of a material having a smallest minimum excited triplet energy out of constituent materials in the emitting layer is absent.

Organic light emitting device

A method for producing a carboxylic acid anhydride includes heating a composition containing a specific compound in a solvent to yield the carboxylic acid anhydride. The solvent is an aprotic polar solvent having a boiling point of 50&#xb0; C. or more.

Method for producing carboxylic acid anhydride, method for producing carboxylic imide, and method for manufacturing electrophotographic photosensitive member

Provided is an electrophotographic photosensitive member including a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer, in which the undercoat layer contains a polymer of a composition containing a compound represented by the formula (1). 

Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

Provided is an electrophotographic photosensitive member comprising a support, an intermediate layer formed on the support, a charge generating layer formed directly on the intermediate layer, and a charge transporting layer formed on the charge generating layer, in which the intermediate layer contains a compound represented by the formula (1). 

The present invention provides an electrophotographic photosensitive member that allows positive ghost to be reduced even in repeated use. The electrophotographic photosensitive member of the present invention is an electrophotographic photosensitive member wherein an undercoat layer contains a polymerization product of a composition including a compound represented by the following formula (1). 

Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

Provided are an electrophotographic photosensitive member comprising: a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer, on which the undercoat layer contains one of a compound represented by the formula (1) and a polymer of a composition containing the compound represented by the formula (1). 

Provided is an electrophotographic photosensitive member including a support, an undercoat layer, and a photosensitive layer in this order, in which: the undercoat layer does not contain a metal oxide, or contains the metal oxide but the content of the metal oxide in the undercoat layer is 10 mass % or less; and the undercoat layer contains a polymerized product of a composition containing at least one kind of anthraquinone derivative selected from the group consisting of a compound represented by the formula (1) and a compound represented by the formula (2). 

An electrophotographic photosensitive member includes a laminated body, the laminated body including a support, an undercoat layer, and a charge generating layer. The undercoat layer includes a polymerized product of a composition including an electron transport material represented by formula (1), a cross-linking agent, and a thermoplastic resin having a polymerizable functional group, the laminated body satisfying expressions (2) and (3)Z&#x2014;X&#x2014;Z&#x2003;&#x2003;(1)0.20&#x2266;|2&#x2212;1|&#x2266;2.0&#x2003;&#x2003;(2)&#x3c4;&#x2266;10&#x2003;&#x2003;(3)in which Zand Zare groups having electron transport property, X is a linker, Vd2 and Vd1 are surface potentials of the charge generating layer after charging and &#x3c4; is transit time based on a change rate of the surface of the charge generating layer, each as defined in the specification.

An electrophotographic photosensitive member includes, in the following order, a support member, an undercoat layer adjacent to the support member, and a photosensitive layer adjacent to the undercoat layer. The undercoat layer contains a polymer produced by polymerizing a composition containing a crosslinking agent and a compound expressed by general formula (1): wherein Rto Rare defined in the specification.

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Yokohama, Japan

Kei Tagami