Idemitsu Kosan Company, Limited

Yoriyuki Takashima

Chishio Hosokawa

Toshihiro Iwakuma

Toshinari Ogiwara

Mitsunori Ito

Masahiro Kawamura

Kazuki Nishimura

Kenichi Fukuoka

Masakazu Funahashi

Yumiko Mizuki

Tetsuya Inoue

Kiyoshi Ikeda

Masashi Sakamoto

Hiroshi Yamamoto

Yuichiro Kawamura

Ichiro Nasuno

Kazuyoshi Koike

Hideki Kamano

Yukitoshi Jinde

Hiroaki Koshima

Motoharu Ishikawa

Mitsuru Shibata

Moritsugu Kasai

Koki Hirano

Junya Iwasaki

Yasunori Shimizu

Taeko Nakano

An object is to provide a viscosity index improver composition that is capable of properly regulating the HTHS viscosity in the effective temperature range of a lubricating oil composition to a lower range, and a lubricating oil composition containing the viscosity index improver composition, and the viscosity index improver composition contains a comb-shaped polymer (A) containing a structural unit derived from a macromonomer (α) and a structural unit derived from a particular monomer (A1), the macromonomer (α) having a (meth)acryloyl group at one end, and having a structural unit derived from a monomer (α1) selected from butadiene and hydrogenated butadiene.

Viscosity index improver composition and lubricating oil composition

A dispersant for a lubricating oil, containing at least one compound selected from a specific nitrogen-containing compound which is obtained by using, as raw materials, (A) at least one polyolefin selected from polybutene and polyisobutene, (B) at least one maleic acid compound selected from maleic acid and maleic anhydride, and (C) polyamine; a boride of the specific nitrogen-containing compound; and an acylated product of the specific nitrogen-containing compound. The polyolefin (A) satisfies at least one of the following conditions (&#x3b1;) and (&#x3b2;). (&#x3b1;) a ratio (Sb/Sa) of an integrated value (Sb) of a peak present at 4.40 to 5.00 ppm in aH-NMR spectrum to an integrated value (Sa) of a peak present at 5.01 to 5.60 ppm in the 1H-NMR spectrum is 2 or more. (&#x3b2;) a ratio (Sd/Sc) of an integrated value (Sd) of a peak present at 1.76 to 2.10 ppm in theH-NMR spectrum to an integrated value (Sc) of a peak present at 1.65 to 1.75 ppm in theH-NMR spectrum is 1 or more.

Dispersing agent for lubricating oil, method for producing same, and lubricating oil composition

Lubricating oil compositions may include a base oil, a succinimide compound, and a thioheterocyclic compound. Such compositions may have a sulfur content of 0.10 mass % to 1.00 mass % based on a total amount of the composition. A phosphorus content represented by P in mass % and a sulfated ash content represented by M in mass %, based on the total amount of such compositions, may satisfy any of conditions A to C: condition A: P&#x3c;0.03, and M&#x3c;0.3; condition B: P&#x3c;0.03 and 0.3&#x2266;M&#x2266;0.6; and condition C: 0.03&#x2266;P&#x2266;0.06 and M&#x3c;0.3.

Lubricating oil composition for engine made of aluminum alloy and lubrication method

Provided is an organic electroluminescence device having a long lifetime and capable of emitting blue light with high luminous efficiency. The organic electroluminescence device has an organic thin film layer composed of one or multiple layers including at least a light emitting layer and interposed between a cathode and an anode. In the organic electroluminescence device, the light emitting layer contains at least one kind selected from compounds each having a specific fluoranthene structure and at least one kind selected from fused ring-containing compounds each having a specific structure.

Organic electroluminescence device

A material for organic electroluminescent devices including a 2,7-disubstituted naphthalene ring in its molecule of formulas (1) and (2): and an organic electroluminescent device including an organic thin film layer having one or more layers between a cathode and an anode. An organic electroluminescence device having the organic thin film layer which includes the material for organic electroluminescent devices and at least one kind of phosphorescent emitting materials has long lifetime and high current efficiency.

Organic electroluminescent element material and organic electroluminescent element comprising same

A fluoranthene compound with a specified asymmetric structure; an organic EL device which is composed of one or more organic compound layers including at least one emitting layer sandwiched between a pair of electrodes, wherein at least one of the organic compound layers contains at least one kind of the fluoranthene compound; and a solution containing a material for the organic EL which is composed of the fluoranthene compound as the material for the organic EL and a solvent. An organic electroluminescence (EL) device having a superior luminance of light emission, an enhanced efficiency of light emission, and a prolonged lifetime and a compound realizing the device are provided.

Fluoranthene compound, organic electroluminescence device using the same, and solution containing organic electroluminescence material

An organic electroluminescence device and a material for producing the organic electroluminescence device. The organic electroluminescence device includes an organic thin film layer between a cathode and an anode, the organic thin film layer including one or more layers, in which the organic thin film layer includes one or more light emitting layers and at least one of the light emitting layers includes a phosphorescent material and a host material. The host material has an essential structure in which a naphthalene ring is bonded to a fluorene skeleton, dibenzofuran skeleton, or dibenzothiophene skeleton. The organic electroluminescence device is a phosphorescent device having high efficiency and long lifetime.

Material for organic electroluminescent element, and organic electroluminescent element

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. The organic thin-film layer includes at least one emitting layer. The at least one emitting layer contains at least one phosphorescent material and a host material represented by the following formula (1).Ra&#x2014;Ar&#x2014;Rb&#x2003;&#x2003;(1)In the formula, Ar, Ra and Rb each represent a substituted or unsubstituted benzene ring or a condensed aromatic hydrocarbon ring selected from a substituted or unsubstituted naphthalene ring, a substituted or unsubstituted chrysene ring, a substituted or unsubstituted fluoranthene ring, a substituted or unsubstituted phenanthrene ring, a substituted or unsubstituted benzophenanthrene ring, a substituted or unsubstituted dibenzophenanthrene ring, a substituted or unsubstituted triphenylene ring, a substituted or unsubstituted benzo[a]triphenylene ring, a substituted or unsubstituted benzochrysene ring, a substituted or unsubstituted benzo[b]fluoranthene ring and a substituted or unsubstituted picene ring. Substituents for Ra and Rb are not aryl groups.

Organic electroluminescence device and material for organic electroluminescence device

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: at least one phosphorescent material; and a host material represented by the following formula (1).Ra&#x2014;Ar&#x2014;Ar&#x2014;Rb&#x2003;&#x2003;(1)

A phenanthrene derivative is represented by a formula (1) below. In the formula (1), Arto Areach represent an aromatic hydrocarbon ring group having 6 to 18 carbon atoms for forming the ring. The aromatic hydrocarbon ring group contains none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. L represents a single bond, a substituted or unsubstituted benzene skeleton, naphthalene skeleton, biphenylene skeleton, fluorene skeleton, phenanthrene skeleton, fluoranthene skeleton, triphenylene skeleton, chrysene skeleton, phenyl-naphthalene skeleton or binaphthalene skeleton. Rand Reach represent a substituent, the number of which may be 0, 1 or more. Rand Rmay be bonded in any positions of the phenanthrene skeleton. m, n, l and p each represent 0 or 1 while satisfying m+n+l+p&#x2267;1 (m,n&#x2267;l,p). a and b each represent an integer of 0 to 8. 

Phenanthrene derivative, and material for organic EL element

To attain an organic electroluminescence device having a long lifetime and high luminous efficiency, and is capable of emitting blue light having a high color purity, and an aromatic amine derivative for realizing the device, the present invention provides an aromatic amine derivative having a specific structure, and an organic electroluminescence device including an organic thin film layer composed of one or more layers including at least a light emitting layer and interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the aromatic amine derivative alone or as a component of a mixture.

Aromatic amine derivative and organic electroluminescence device using the same

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer includes at least one phosphorescent material and a host material represented by the following Formula (1).Ra&#x2014;Ar&#x2014;Ar&#x2014;Rb&#x2003;&#x2003;(1)In Formula (1): Ra and Rb each represent a substituted or non-substituted benzene ring or a substituted or non-substituted condensed aromatic hydrocarbon ring selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzochrysene ring and a picene ring; and Arand Areach represent a substituted or non-substituted benzene ring or a substituted or non-substituted condensed aromatic hydrocarbon ring selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzochrysene ring and a picene ring.

A chrysene derivative shown by the following formula: wherein Rto Rand Rto Rare independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 8 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 ring carbon atoms, provided that at least one of Rto Ris a substituted or unsubstituted fused aromatic ring group having 10 to 20 ring carbon atoms or a substituted or unsubstituted fluorenyl group.

Chrysene derivative and organic electroluminescent device using the same

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: a host material represented by the following formula (1); and at least one phosphorescent material.

An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: at least one phosphorescent material; and a host material represented by the following formula (1).Ra&#x2014;Ar&#x2014;Ar&#x2014;Rb&#x2003;&#x2003;(1)In the formula, Ar, Ar, Ra and Rb each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon group selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzochrysene ring, a picene ring and a benzo[b]fluoranthene ring.

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Sodegaura, Japan

Yoriyuki Takashima