Nippon Oil Company

Ikari Corporation

Mitsuo Okada

Hiroyuki Takashima

Ryoji Ohgake

Toru Miyagawa

Teruo Shimizu

Narihito Yamamoto

Toshio Yoshida

Masaru Ushio

Jinichi Igarashi

Masakuni Hirata

Toshishige Kurosawa

Shigeaki Hirata

Tomomasa Osumi

Ryoji Ogake

Takashi Kurosawa

Seiji Oda

Niro Takemasa

Kousaku Okamura

Hiroyuki Uenoyama

Kouzou Kamiya

Isao Honjo

Yuji Ikemoto

Kouichi Oshima

A hydraulic working oil composition for buffers which comprises a lubricating oil as a base oil, (A) a phosphoric acid ester such as dioleyl acid phosphate and/or a phosphorous acid ester such as dioleyl hydrogen phophite, and (B) an adduct of an aliphatic amine such as oleyl amine with an alkylene oxide such as ethylene oxide, the compounds (A) and (B) being the essential components added to said base oil; and, in one embodiment, a process for lubricating buffers which comprises adding said compounds (A) and (B) to said base oil to prepare a hydraulic working oil composition and using the thus prepared oil composition in buffers.

Hydraulic working oil composition for buffers

A hydraulic working oil composition for buffers which comprises: a lubricating oil as a base oil, [I] at least one phosphorus-containing compound selected from the group consisting of a phosphoric acid having a specific structure and a phosphorous acid ester having a specific structure, and [II] at least one nitrogen-containing compound selected from the group consisting of an alkyleneoxide adduct of an aliphatic monoamine having a specific structure, an aliphatic polyamine having a specific structure and a salt of the above aliphatic polyamine having a specific structure, and [III] an aliphatic monoamine having a specific structure, the components [I] to [III] being essential components added to said base oil in a predetermined ratio; and a process for lubricating buffers with said hydraulic working oil composition.

A hydraulic working oil composition for buffers which comprises: a lubricating oil as a base oil, (A) at least one phosphorus-containing compound selected from the group consisting of a phosphoric acid ester having a specific structure, a phosphorous acid ester having a specific structure and a salt of-the phosphoric acid ester and/or the phosphorous acid ester with an aliphatic monoamine having 8-22 carbon atoms, and (B) at least one nitrogen-containing compound selected from the group consisting of an aliphatic polyamine having a specific structure and a salt of the aliphatic polyamine with an aliphatic acid having 6 carbon atoms, the compounds (A) and (B) being essential components added to said base oil.

Lubricant base oils are made up essentially of 2-15% by weight of a total aromatics content, greater than 60% by weight of isoparaffins and monocyclic naphthenes in total, more than 30% by weight of alkylbenzenes in the total aromatics content and smaller than 4% by weight of tricyclic and tetracyclic aromatics in the total aromatics content. The base oil has great viscosity index, small pour point, high oxidative stability and heat stability and sufficient capability to dissolve sludge.

Lubricating oils

A lubricating oil composition comprises a mixture of a first ester of medium-chain saturated fatty acid and glycerol and a second ester of sucrose and carboxylic acid. The composition has improved physical characteristics including high hygienic safety, increased oxidative stability, enhanced lubricating performance, adequate viscosity and other properties required for lubricating particularly food processing machineries and implements.

Lubricating oil composition for food processing machineries

An oil and fat composition for food processing machines comprises polyglycerides of medium chain saturated fatty acids and/or mixed polyglycerides of medium chain saturated fatty acids and long chain saturated fatty acids and, optionally, triglycerides of medium chain saturated fatty acids. The composition is safe for food sanitation, has excellent oxidation stability and lubricating property and a suitable degree of viscosity and cloud point as well as a high viscosity and a low temperature fluidity which cannot be attained by MCT and is favorably utilized as lubricating oil for food processing machines and tools and agricultural machines and tools.

Oil and fat composition for lubricating food processing machines and use

A method for preserving the degree of freshness of poultry shell eggs is disclosed which comprises spraying the surface of a shell egg with an effective amount of a composition comprising a triglyceride of saturated fatty acids (I) of the following general formula: ##STR1## wherein: R.sup.1, R.sup.2 and R.sup.3 are the same or different, linear aliphatic hydrocarbon groups containing from 5 to 21 carbon atoms, and as an essential ingredient, a fatty acid (II) containing from 12 to 20 carbon atoms in an amount of from 0.01 to 0.5% by weight on the basis of the total weight of the composition.

Method for preserving the degree of freshness of eggs

A greasy oil and fat composition for food processing machines is prepared by mixing a fatty acid ester of polyglycerol, oil and fat for food and glycerol, melting the mixture by heating and kneading the mixture. The greasy oil and fat composition is safe for food sanitation, has excellent oxidation stability and lubricating properties and is favorably utilized as lubricant for food processing machines.

Greasy oil and fat composition for food processing machines

A composition for the freshness-preservation of foodstuffs is disclosed which comprises, as an active base a triglyceride of saturated fatty acids (I) corresponding to the following general formula: ##STR1## wherein: R.sup.1, R.sup.2 and R.sup.3 are the same or different, linear aliphatic hydrocarbon groups containing from 5 to 21 carbon atoms.

Method for fresh preservation of foodstuffs

Lubricating oil compositions favorably used for food processing machines are disclosed. The oil compositions exhibit highly improved oxidation stability, wear resistance and rust prevention. Raw materials quite harmless to human bodies can be used in the production of said lubricating oil composition which comprises (I) as the base oil, a saturated fatty acid glyceride represented by the following general formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each a straight-chain alkyl group and (II) as an essential component, a fatty acid in an amount of 0.001 to 5% by weight, based on the total composition.

Growing community of inventors

Yokohama, Japan

Mitsuo Okada