Nippon Oil Company

Nippon Mitsubishi Oil Corporation

Matsushita Electric Industrial Co., Ltd.

Mitsubishi Jukogyo Kabushiki Kaisha

Sanyo Chemical Industries, Ltd.

Umekichi Sasaki

Hiroshi Hasegawa

Noboru Ishida

Tatsuyuki Ishikawa

Katsuya Takigawa

Satoshi Suda

Motoshi Sunami

Masaaki Tsunemi

Hideo Yokota

Yuji Shimomura

Yoshiyuki Morikawa

Shigetoshi Ogura

Kaichi Yamada

Fujio Komatu

Kazuo Uchinuma

A fluid composition for a refrigerator, which comprises a chlorine-free fluorocarbon refrigerant and a refrigerator oil, said refrigerator oil consisting essentially of a tetraester of pentaerythritol of formula (1) with both 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid, said refrigerator oil exhibiting a pour point not higher than &#x2212;10&#xb0; C.

Fluid compositions containing refrigeration oils and chlorine-free fluorocarbon refrigerants

A refrigerator oil for use in compressors using therein a hydrogen-containing halogenocarbon as a refrigerant, consisting essentially of as a base oil at least one kind of an ester selected from the group consisting of a specific pentaerythritol ester such as an ester of pentaerythritol with a mono- or dicarboxylic acid, a specific polyol ester such as an ester of trimethylolethane with a mono- or dicarboxylic acid, a specific ester such as an ester of ethylene glycol and a dicarboxylic acid, and a specific polyol ester synthesized from a neopentyl type polyhydric alcohol, a monocarboxylic acid and a dicarboxylic acid; and further comprising at least one kind of an epoxy compound.

Fluid compositions containing refrigerator oils and chlorine-free fluorocarbon refrigerants

Refrigerator oils for use with chlorine-free fluorocarbon refrigerants

A refrigerator oil composition for use with an HFC refrigerant containing HFC-134,, HFC-125 or a mixture thereof, which comprises component (A) and component (B), said component (A) being 70 to 99% by weight of an alkylbenzene oil containing at least 60% by weight, based on the total weight of component (A), of alkylbenzenes having a molecular weight of 200 to 350 and said component (B) being 30 to 1% by weight of at least one synthetic oil containing oxygen selected from the group consisting of an ester, a polyalkylene glycol, an alkyl ether of the polyalkylene glycol, a modified compound of polyglycol, a ketone, a polyphenyl ether, a silicone, a polysiloxane and a perfluoro ether.

Refrigerator oil compositions and fluid compositions for refrigerator

A refrigerator oil for use with an HFC refrigerant containing HFC-134a and/or HFC-125, which comprises an alkylbenzene oil containing at least 60% by weight of alkylbenzenes having a molecular weight of 200 to 350. An oil composition for use in a refrigerator, which comprises the refrigerator oil mentioned above and an HFC refrigerant containing HFC-134a and/or HFC-125, together with or without an additive such as a phosphoric ester compound.

Fluid composition comprising HFC refrigerant and alkylbenzene-based refrigerator oil

A refrigerator oil for use in compressors using therein a hydrogen-containing halogenocarbon as a refrigerant, consisting essentially of as a base oil at least two esters selected from the group consisting of a specific pentaerythritol ester such as an ester of pentaerythritol with a mono- or dicarboxylic acid, a specific polyol ester such as an ester of trimethylolethane with a mono- or dicarboxylic acid, a specific ester such as an ester of ethylene glycol and a dicarboxylic acid, and a specific polyol ester synthesized from a neopentyl type polyhydric alcohol, a monocarboxylic acid and a dicarboxylic acid; and further comprising at least one kind of an epoxy compound.

Fluid compositions containing refrigerator oils and chlorine-free

A refrigerating machine oil for use with a hydrofluorocarbon refrigerant in a refrigerator, which comprises at least one member selected from the group consisting of hydrocarbon compounds represented by the following general formulas (1), (2) and (3) ##STR1## (wherein R represents an alkylene group or alkenylene group having 1 to 8 carbon atoms; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be the same or different and are each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, the total number of carbon atoms of R, R.sup.1, R.sup.2 R.sup.3 and R.sup.4 being within a range of 1 to 8; and R.sup.6, R.sup.7, R.sup.8 and R.sup.9 may be the same or different and are each a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, the total number of carbon atoms of R.sup.6, R.sup.7, R.sup.8 and R.sup.9 being within a range of 1 to 10). In other embodiments, a fluid composition for use in refrigerating machine which comprises a hydrofluorocarbon refrigerant and at least one hydrocarbon compound, a refrigerating machine which uses therein the fluid composition as a circulating fluid, and a method of lubricating a cooling system of a refrigerator using therein a hydrofluorocarbon refrigerant by using said refrigerator oil in the cooling system.

Fluid composition for use in a refrigerating machine in which the

A lubricating oil for refrigerating machines comprises polyoxyalkylene compounds represented by the formula (I): ##STR1## Wherein A is a residue obtained from a compound which has both a heterocyclic ring having an ether linkage therein and hydroxyl groups by eliminating the hydroxyl groups from the compound; R.sup.1 and R.sup.2 are each an alkylene group; R.sup.3 is an alkyl group; R.sup.4 is hydrogen atom or an alkyl group; a and b are each a positive integer and l, m, and n are each an integer of 0 or more; and a.multidot.1+b.multidot.m=2 to 100 and l+m+n=2 to 20; further,

Lubricating oil and composition for refrigerating machine, and

A refrigerating machine oil for use with a hydrofluorocarbon refrigerant in a refrigerator, which comprises at least one member selected from the group consisting of hydrocarbon compounds represented by the following general formulas (1), (2) and (3) ##STR1## (wherein R represents an alkylene group or alkenylene group having 1 to 8 carbon atoms; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be the same or different and are each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, the total number of carbon atoms of R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 being within a range of 1 to 8; and R.sup.6, R.sup.7, R.sup.8 and R.sup.9 may be the same or different and are each a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, the total number of carbon atoms of R.sup.6, R.sup.7, R.sup.8 and R.sup.9 being within a range of 1 to 10). In other embodiments, a fluid composition for use in refrigerating machine which comprises a hydrofluorocarbon refrigerant and at least one hydrocarbon compound, a refrigerating machine which uses therein the fluid composition as a circulating fluid, and a method of lubricating a cooling system of a refrigerator using therein a hydrofluorocarbon refrigerant by using said refrigerator oil in the cooling system.

A refrigerator oil composition for a fluoroalkane refrigerant, which comprises a base oil composed principally of an oxygen-containing compound and, based on the total weight of the composition, 0.005-5.0 wt. % of a boron compound as an essential component.

Lubricating compositions comprising fluoroalkane refrigerant, an ester

A refrigerator oil composition for a fluoroalkane refrigerant comprises a base oil composed principally of at least one oxygen-containing compound and, based on the total weight of the composition, [I] 0.5-5.0 wt. % of a phosphate ester represented by the formula (A), and [II] (a) 0.1-5.0 wt. % of a halogenated phosphate ester represented by the formula (B) and/or (b) 0.01-2.0 wt. % of an acid phosphate ester represented by the formula (C), an amine salt thereof or a combination of both the acid phosphate ester and the amine salt. ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 represent a C.sub.1-18 hydrocarbon or oxygen-containing hydrocarbon group; R.sup.4, R.sup.5 and R.sup.6 represent a C.sub.1-18 hydrocarbon or oxygen-containing hydrocarbon group or a group similar to the C.sub.1-18 hydrocarbon or oxygen-containing hydrocarbon groups except for the substitution of at least one of the hydrogen atoms by a corresponding number of halogen atom or atoms with the proviso that the total number of halogen atoms contained in R.sup.4, R.sup.5 and R.sup.6 is 1-9; and R.sup.7 and R.sup.8 represent a hydrogen atom, a C.sub.1-18 hydrocarbon or oxygen-containing hydrocarbon group.

Refrigerator oil composition containing phosphate ester additives for

A refrigerator oil mainly comprises, as a base oil, an ester of a carboxylic acid having a specific structure represented by the formula ##STR1## and at least one kind of an epoxy compound, which refrigerator oil is excellent in electrical insulating properties, stability to hydrolysis, wear resistance, non-hydroscopicity, compatibility with a hydrogen-containing halogeno carbon refrigerant, and thrmal stability and chemical stability.

Synthetic lubricating oil

A fluid composition for refrigerators, which comprises [A] a halogenocarbon refrigerant, and [B] a synthetic lubricating oil comprising at least one carbonic acid ester selected from the group consisting of:

Fluid compositions for refrigerators

Lubricating oil compositions comprising a base oil and a halogen containing ester of phosphoric acid having a specified structure in an amount in the range of from 0.01 to 5 parts by weight relative to 100 parts by weight of the base oil, and lubricating oil compositions further comprising an epoxy compound in an amount in the range of from 0.1 to 5 parts by weight relative to 100 parts by weight of the base oil.

Composition for lubricating oil

A synthetic lubricating oil comprising as a base oil at least one kind of a carbonic acid ester selected from the group consisting of:

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Yokohama, Japan

Umekichi Sasaki