摘要:
A refrigerator oil composition includes: a synthetic base oil; and a partial hydrocarbyl ether of an aliphatic polyhydric alcohol condensate, in which the aliphatic polyhydric alcohol condensate includes a condensate of 4 to 20 molecules of a hindered glycol and/or an aliphatic polyhydric alcohol having 3 to 6 hydroxyl groups. The refrigerator oil composition is preferably used in a compression refrigerator that uses a hydrofluorocarbon, a natural refrigerant such as a hydrocarbon, carbon dioxide, or ammonia, a mixed refrigerant of fluoroiodomethane and propene, an unsaturated fluorinated hydrocarbon, a fluorinated ether, a fluorinated alcohol, a fluorinated ketone, or a mixture thereof as a refrigerant, has a low coefficient of friction, and is excellent in energy-saving property.
摘要:
A refrigerator oil composition includes: a synthetic base oil; and a partial hydrocarbyl ether of an aliphatic polyhydric alcohol condensate, in which the aliphatic polyhydric alcohol condensate includes a condensate of 4 to 20 molecules of a hindered glycol and/or an aliphatic polyhydric alcohol having 3 to 6 hydroxyl groups. The refrigerator oil composition is preferably used in a compression refrigerator that uses a hydrofluorocarbon, a natural refrigerant such as a hydrocarbon, carbon dioxide, or ammonia, a mixed refrigerant of fluoroiodomethane and propene, an unsaturated fluorinated hydrocarbon, a fluorinated ether, a fluorinated alcohol, a fluorinated ketone, or a mixture thereof as a refrigerant, has a low coefficient of friction, and is excellent in energy-saving property.
摘要:
The present invention provides a refrigerator oil composition comprising a base oil which is at least one member selected from mineral oils and synthetic oils, and at least one imide compound, said imide compound in an amount of 0.01 to 5% by mass based on the total amount of the refrigerator oil composition, and also provides a compressor and a refrigeration apparatus using the refrigerator oil composition. The refrigerator oil composition and the compressor and the refrigeration apparatus using the refrigerator oil composition satisfy both sludge dispersibility and prevention of wear and seizing of a sliding part made of aluminum and/or iron.
摘要:
The present invention provides a refrigerator oil composition comprising a base oil which is at least one member selected from mineral oils and synthetic oils, and at least one imide compound, said imide compound in an amount of 0.01 to 5% by mass based on the total amount of the refrigerator oil composition, and also provides a compressor and a refrigeration apparatus using the refrigerator oil composition. The refrigerator oil composition and the compressor and the refrigeration apparatus using the refrigerator oil composition satisfy both sludge dispersibility and prevention of wear and seizing of a sliding part made of aluminum and/or iron.
摘要:
The present invention is directed to a lubricating oil additive containing a reaction product of a succinimide compound and a phosphorus atom-containing compound, and to a lubricating oil composition containing a mineral oil and/or a synthetic base oil, and the above lubricating oil additive.
摘要:
A mobile terminal has a simple construction in a mobile communication system of a small-zone system. The mobile terminal 1 transmits base station identification information transmitted from base stations 2a through 2d and information of the intensity of electric field of received radio wave from the base station to a position managing station, while the position managing station specifies the current position of the mobile terminal, based on the above-mentioned information by means of a relational expression of the intensity of electric field and a distance between a point of transmission and reception and a database of the base station. With the simple construction of the mobile terminal 1, the current position of the mobile terminal 1 can be specified with higher accuracy. Further, the mobile terminal 1 transmits the base station identification information of the plurality of base stations and the intensity of electric field of the received radio wave from the base station to the position managing station, the current position of the mobile terminal 1 can be specified with higher accuracy.
摘要:
Overbased sulfurized alkaline earth metal phenates which are oil soluble, excellent in detergency dispersancy and have high base value, and an effective process for production of said overbased sulfurized alkaline earth metal phenates under conditions providing less sludge and less raw material recovery, and further a lubricating oil additives containing said overbased sulfurized alkaline earth metal phenates as a main ingredient and a lubricating oil composition which comprises said lubricating oil additive compounded in a lubricating oil are disclosed. Since the resulting overbased sulfurized alkaline earth metal phenates have high base value and excellent oil-solubility, they can be effectively utilized as lubricating oil additives.
摘要:
Provided is a detergent-dispersant for a lubricant having excellent detergency and dispersibility effects. Specifically provided are: a detergent-dispersant including a heterocyclic compound having a heterocyclic skeleton derived from a compound selected from the group consisting of pyridines, pyrroles, pyrimidines, pyrazoles, pyridazines, imidazoles, pyrazines, triazines, triazoles, tetrazoles, oxazoles, oxadiazoles, thiazoles, thiadiazoles, furans, dioxanes, pyrans, and thiophenes; and an additive composition for a lubricant and a lubricant composition, each containing the detergent-dispersant.
摘要:
Provided are a borosuccinimide compound obtained through reaction of (a) a succinic acid/anhydride substituted with an alkyl or alkenyl group having a number-average molecular weight of from 200 to 5,000, (b) a polyalkylene-polyamine of which at least 5 mol % has a terminal cyclic structure, and (c) a boron compound; and a succinimide compound obtained through reaction of (A) a succinic acid/anhydride substituted with an alkyl or alkenyl group having a molecular weight of from 200 to 5,000, with (D) a hydrocarbon-substituted polyalkylene-polyamine. These compounds are stable even at high temperatures and have good high-temperature detergency, and they are useful for ashless detergent dispersants having the ability to disperse fine particles. Also provided are a mixture of any of these compounds and a specific ester derivative; a lubricant additive and a fuel oil additive comprising the mixture as the essential ingredient; and a lubricant and a fuel oil composition containing the additive.
摘要:
There are herein disclosed an additive for a lubricant or a fuel which comprises at least one selected from the group consisting of substituted hydroxyaromatic ester derivatives represented by the general formulae (I) and (II) ##STR1## wherein R.sup.1 to R.sup.5 are each an organic group having 6 or more carbon atoms, a, b, d, e, k and m are from 1 to 3, c, f, g, i and j are from 0 to 3, and h is from 0 to 4, but (f+g) is from 1 to 3, and (h+i) is from 1 to 6, an additive composition for a lubricant or a fuel, and a lubricating oil composition or a fuel composition containing the above-mentioned additive. The above-mentioned additive for the lubricant or the fuel is desirable as an ashless detergent excellent in high-temperature stability in place of a metal detergent, and the lubricating oil composition or the fuel composition containing this additive can suitably be used as the lubricant or the fuel for an internal combustion engine which can comply with future exhaust gas controls.