Idemitsu Kosan Company, Limited

Denso Corporation

Kabushiki Kaisha Toyota Jidoshokki

Honda Motor Co., Ltd.

Sanyo Electric Co., Ltd.

Idemitsu Kosan Co ., Ltd.

Masato Kaneko

Harutomo Ikeda

Nobuaki Shimizu

Takahiro Hoshida

Yasuhiro Kawaguchi

Tokue Sato

Hiroshi Nagakawa

Masataka Muto

Takayuki Kato

Shozo Ikejima

Satoshi Nagao

Masahito Yamashita

Takeo Tokiai

Toshinori Tazaki

Hiroaki Koshima

Hideo Kanamori

Hiromichi Seiki

Izumi Terada

Shuichi Sakanoue

Masaki Inoue

Masaki Ota

Tetsuhiko Fukanuma

Ryo Matsubara

Toshiyuki Tsubouchi

Hitoshi Hata

Noboru Hayashi

Tomoya Matsumoto

Katsumi Ichitani

Takeo Komatsubara

Tatsuya Egawa

Masato Takamatsu

Masami Sanuki

Takashi Sunaga

Kenji Mogami

Tadashi Kisen

So Nakajima

Hirotaka Yamasaki

Minoru Takagi

Yuki Yokoi

Kenichi Yamashita

Masahiro Suzuki

Toyokazu Handa

Mitsuru Osawa

Shuichi Yasuda

Takashi Kondo

Katsuhiko Shiotsuki

Taira Mutoh

Tsuneo Konishi

Provided is a lubricating oil composition for a refrigerator which uses a base oil including as the main component at least one kind of oxygen-containing compounds selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of poly(oxy)alkylene glycols or monoethers thereof and polyvinyl ethers, polyol esters, and polycarbonates. The lubricating oil composition for a refrigerator is used for a refrigerator that uses, as a refrigerant, a fluorine-containing organic compound, which is a refrigerant applicable to current car air conditioner systems or the like and has a specific polar structure, and has favorable sealing property, a low coefficient of friction factor in a sliding part, and excellent stability as well as excellent compatibility with the refrigerant.

Lubricating oil composition for refrigerators

A refrigerator oil that is excellent in thermal stability and oxidation stability is provided. The refrigerator oil contains at least one compound selected from the group consisting of a polyvinyl ether compound, a polyoxyalkylene glycol compound, and a polyol ester compound and has a Hazen color number according to ASTM D1209-05 of 0 to 10.

Freezer oil, composition for freezers, freezer, and method for selecting freezer oil

Disclosed herein is a mixed composition for a refrigerator, which contains: a refrigerant containing at least one unsaturated fluorinated hydrocarbon compound selected from compounds represented by the following molecular formula (1): CFH, and a refrigerator lubricating oil containing, as a major component, a polyoxyalkylene glycol compound represented by the following general formula (2), and containing an amine compound in an amount of 1.0% by mass or more based on the total amount of the refrigerator lubricating oil: R&#x2014;[(OR)&#x2014;OR](2). According to the present disclosure, a mixed composition for a refrigerator can be provided that has a less possibility of autoignition under a high temperature environment even in an unexpected leakage thereof in a refrigerator using a refrigerant containing a slightly flammable refrigerant, and a refrigerator lubricating oil can be provided that is capable of being applied to the mixed composition for a refrigerator.

Refrigerator lubricating oil and mixed composition for refrigerator

The lubricating oil composition for a refrigerator of the present invention is used with a refrigerant containing carbon dioxide, and contains a base oil (A) containing a polyoxyalkylene glycol as a major component, and an alcohol (B) having at least one hydroxy group, in which a total number of the hydroxy group and an ether bond is from 2 to 3 (provided that the number of an ether bond may be 0).

Lubricating oil composition for refrigerator, composition for refrigerator, lubricating method, and refrigerator

The refrigerator lubricating oil of the present invention contains: a base oil containing, as a major component, a polyol ester (A) of a fatty acid (a1) that is a fatty acid having a number of carbon atoms of from 3 to 18 and a polyol (a2) that is selected from neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol, and dipentaerythritol; and a disulfide and/or trisulfide compound (B), and the disulfide and/or trisulfide compound (B) is blended in an amount of from 30 to 10,000 ppm by mass in terms of sulfur equivalent based on the total amount of the refrigerator lubricating oil.

Disclosed herein is a mixed composition for a refrigerator, the mixed composition containing: a refrigerant containing at least one unsaturated fluorinated hydrocarbon compound selected from compounds represented by the following molecular formula (1): CFH(1), provided that the compound has one or more carbon-carbon unsaturated bond in a molecule; and a refrigerator lubricating oil containing, as a major component, a polyoxyalkylene glycol compound represented by the following general formula (2), and containing a phenothiazine compound in an amount of 1.0% by mass or more based on the total amount of the refrigerator lubricating oil: R&#x2014;[(OR)&#x2014;OR](2). A mixed composition for a refrigerator is provided having a lower possibility of autoignition in a high temperature environment even during unexpected leakage in a refrigerator using a refrigerant containing a slightly flammable refrigerant. A refrigerator lubricating oil is provided that is capable of being applied to the mixed composition.

The lubricating oil composition for a refrigerator according to the present invention is a lubricating oil composition for a refrigerator containing a base oil containing a low-viscosity base oil component having added thereto a polyoxyalkylene glycol compound having a kinetic viscosity at 100&#xb0; C. that is higher than the low-viscosity base oil component, and the base oil has a kinetic viscosity at 100&#xb0; C. of 2.4 to 25 mm/s and a ratio (Mw/Mn) of a weight average molecular weight (Mw) and a number average molecular weight (Mn) of 1.3 to 13.

Lubricating oil composition for refrigerator, and refrigerator

The mixed composition for a refrigerator of the present invention contains: a refrigerant containing at least one unsaturated fluorinated hydrocarbon compound selected from compounds represented by the following molecular formula (1):CFH&#x2003;&#x2003;(1)wherein p represents an integer of from 2 to 6; r represents an integer of from 1 to 11; and s represents an integer of from 1 to 11, provided that the compound has one or more carbon-carbon unsaturated bond in a molecule, and a refrigerator lubricating oil containing, as a major component, a polyol ester (A) of a fatty acid (a1) that is a fatty acid having a number of carbon atoms of from 9 to 16 and has a content of a fatty acid having a number of carbon atoms of 9 of 50% by mol or more based on the total amount of the fatty acid (a1), and a polyol (a2) that is pentaerythritol and/or dipentaerythritol.

The refrigerator oil according to the present invention includes a base oil including an oxygen-containing organic compound and a phosphorus-based compound represented by the following general formula (1).  In the formula (1), n represents an integer of 1 to 10; Rto Reach independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; and Ar represents a divalent hydrocarbon group having 2 to 20 carbon atoms.

Refrigerator oil, refrigerator oil composition, and refrigerator

The refrigerator oil composition of the present invention is for a refrigerator in which a refrigerant containing as a major component at least one of a fluorine-containing organic compound selected from a compound represented by the following molecular formula (A) is used: CFR(A), wherein R represents Cl, Br, I, or H; p represents an integer of from 2 to 6; r represents an integer of from 1 to 12; and s represents an integer of from 0 to 11, provided that the molecule has one or more carbon-carbon unsaturated bond, and the composition contains a polyol ester compound and a polyoxyalkylene glycol compound as a base oil in a mass ratio of from 10/90 to 98/2.

Refrigeration machine oil composition

Provided is a refrigerating machine oil composition, which is to be used for a refrigerant including a mixture of an unsaturated fluorinated hydrocarbon compound, a saturated fluorinated hydrocarbon compound and CO, contains a base oil which includes at least one selected from a polyoxyalkylene glycol, a polyvinyl ether, a copolymer of a poly(oxy)alkylene glycol or a monoether thereof and a polyvinyl ether, and a polyol ester and has a kinematic viscosity at 100&#xb0; C. of 2 mm/s or more and 50 mm/s or less and a hydroxyl value of 5 mgKOH/g or less, is able to be used for a refrigerating machine system using a refrigerant having a low global warming potential and usable especially for a car air conditioner or the like and including a mixture of an unsaturated fluorinated hydrocarbon compound, a saturated fluorinated hydrocarbon compound and CO, and exhibits not only excellent compatibility with the refrigerant but also excellent stability.

Refrigerator oil composition and refrigerator system

Provided is a lubricant composition for a refrigerator having the following characteristics: the composition being used for a refrigerator using a refrigerant having a specific structure such as an unsaturated fluorinated hydrocarbon compound serving as a refrigerant having a low global warming potential and usable particularly in current air-conditioning system for cars; the composition having excellent stability as well as excellent compatibility with the refrigerant; the composition including a base oil containing a polyoxyalkylene glycol derivative as a main component and 1 to 20% by mass of a monoepoxy compound based on the total amount of the composition; and the refrigerator using a refrigerant containing at least one kind of fluorine-containing organic compound selected from compounds represented by the molecular formula (A) COFRor including a combination of the fluorine-containing organic compound and a saturated fluorinated hydrocarbon compound.

Lubricating oil composition for refrigerating machine

A lubricating oil composition for a refrigerating machine according to the present invention includes: a base oil including as a main component at least one kind of oxygen-containing compound selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of poly(oxy)alkylene glycols or monoethers thereof and polyvinyl ethers, polyol esters, and polycarbonates; a sulfonic acid metal salt having a hydrocarbyl group; and a phosphoric acid ester. The lubricating oil composition for a refrigerating machine can enhance the abrasion resistance of a sliding part of a refrigerating machine using a refrigerant including at least one kind of fluorine-containing organic compound selected from compounds represented by the following molecular formula (A) or including a combination of the fluorine-containing organic compound and a saturated fluorinated hydrocarbon compound: COFR(A) [in the formula: R represents Cl, Br, I, or H; and p represents an integer of from 1 to 6, q represents an integer of from 0 to 2, r represents an integer of from 1 to 14, and s represents an integer of from 0 to 13, provided that, when q represents 0, p represents from 2 to 6 and one or more carbon-carbon unsaturated bonds are included in a molecule].

Lubricating-oil composition for refrigeration device

Growing community of inventors

Ichihara, Japan

Masato Kaneko