A metal surface coating composition including a high-consistency material containing a lubricant base oil and an amide compound, and a composition of a phosphorus compound containing one or more compounds represented by the below formulae and a metal, wherein the ratio (a/b) of the number of amide groups (a) and the number of acidic groups (b) is within a range of 1.1 to 6.0:

##STR00001## where X.sup.1 to X.sup.7 represent an oxygen atom or a sulfur atom, R.sup.11 to R.sup.13 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms, and R.sup.14 to R.sup.16 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms.

A metal surface coating composition including a high-consistency material containing a lubricant base oil and an amide compound, and a composition of a phosphorus compound containing one or more compounds represented by the below formulae and a metal, wherein the ratio (a/b) of the number of amide groups (a) and the number of acidic groups (b) is within a range of 1.1 to 6.0:

##STR00001## where X.sup.1 to X.sup.7 represent an oxygen atom or a sulfur atom, R.sup.11 to R.sup.13 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms, and R.sup.14 to R.sup.16 represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms wherein at least one of them is a hydrocarbon group having 1 to 30 carbon atoms.

An electrical device containing an enzymatically-degummed vegetable oil is disclosed. Also disclosed are methods for insulating and cooling a transformer using enzymatically-degummed vegetable oils, and methods for adding an enzymatically-degummed vegetable oil to an enclosure of an electrical device. Further disclosed are processes for making dielectric fluids using enzyme-degumming of vegetable oils or using enzyme-degummed vegetable oils as the starting material for the process.

An electrical device containing an enzymatically-degummed vegetable oil is disclosed. Also disclosed are methods for insulating and cooling a transformer using enzymatically-degummed vegetable oils, and methods for adding an enzymatically-degummed vegetable oil to an enclosure of an electrical device. Further disclosed are processes for making dielectric fluids using enzyme-degumming of vegetable oils or using enzyme-degummed vegetable oils as the starting material for the process.

The present invention provides a process to extract liquid dielectric coolant from the rice bran oil, which is suitable for both power frequency and high frequency electrical applications. The process comprises the steps of, processing the refined, bleached and deodorized rice bran oil with an alkali to remove the fatty acids. After processing the rice bran seed oil, at step, the processed rice bran oil is blended with a sodium hydroxide (NaOH) solution. The blended rice bran oil forms a top layer and a bottom layer within short duration of time. At step, the top layer is extracted and is water washed and filtered. At step, the top layer rice bran oil is mixed with the tert butyl hydroxy quinone solution. Finally, at step, the mixture of filtered top layer and tert butyl hydroxy quinone solution is heated to extract the liquid dielectric coolant.

The present invention provides a process to extract liquid dielectric coolant from the rice bran oil, which is suitable for both power frequency and high frequency electrical applications. The process comprises the steps of, processing the refined, bleached and deodorized rice bran oil with an alkali to remove the fatty acids. After processing the rice bran seed oil, at step, the processed rice bran oil is blended with a sodium hydroxide (NaOH) solution. The blended rice bran oil forms a top layer and a bottom layer within short duration of time. At step, the top layer is extracted and is water washed and filtered. At step, the top layer rice bran oil is mixed with the tert butyl hydroxy quinone solution. Finally, at step, the mixture of filtered top layer and tert butyl hydroxy quinone solution is heated to extract the liquid dielectric coolant.

The present invention relates to dielectric fluids and esters, particularly to ester compositions suitable for use in dielectric fluid compositions as well as to dielectric fluid compositions, methods of manufacturing ester compositions and dielectric fluid compositions, and to electrical apparatus containing the dielectric fluids.

The present invention relates to dielectric fluids and esters, particularly to ester compositions suitable for use in dielectric fluid compositions as well as to dielectric fluid compositions, methods of manufacturing ester compositions and dielectric fluid compositions, and to electrical apparatus containing the dielectric fluids.

Electrical insulating paper according to an embodiment of the present invention is used while being immersed in electrical insulating oil, and includes a paper base material mainly containing cellulose, an adsorption layer formed on an entire surface of the paper base material by adsorption, and a moisture barrier layer formed by being chemically bonded to the adsorption layer. The moisture barrier layer includes an amphipathic molecule containing both a hydrophobic hydrocarbon group and a hydrophilic functional group in one molecule. The amphipathic molecule is chemically bonded to the adsorption layer via the hydrophilic functional group. The hydrophobic hydrocarbon group covers the surface of the paper base material.

Electrical insulating paper according to an embodiment of the present invention is used while being immersed in electrical insulating oil, and includes a paper base material mainly containing cellulose, an adsorption layer formed on an entire surface of the paper base material by adsorption, and a moisture barrier layer formed by being chemically bonded to the adsorption layer. The moisture barrier layer includes an amphipathic molecule containing both a hydrophobic hydrocarbon group and a hydrophilic functional group in one molecule. The amphipathic molecule is chemically bonded to the adsorption layer via the hydrophilic functional group. The hydrophobic hydrocarbon group covers the surface of the paper base material.