CA1236122A - Electrical insulating oil and oil-filled electrical appliances - Google Patents

Electrical insulating oil and oil-filled electrical appliances

Info

Publication number
CA1236122A
CA1236122A CA000475726A CA475726A CA1236122A CA 1236122 A CA1236122 A CA 1236122A CA 000475726 A CA000475726 A CA 000475726A CA 475726 A CA475726 A CA 475726A CA 1236122 A CA1236122 A CA 1236122A
Authority
CA
Canada
Prior art keywords
oil
electrical
insulating oil
electrical insulating
filled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000475726A
Other languages
French (fr)
Inventor
Atsushi Sato
Keiji Endo
Shozo Hayashi
Hitoshi Yanagishita
Shigenobu Kawakami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eneos Corp
Original Assignee
Nippon Petrochemicals Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Petrochemicals Co Ltd filed Critical Nippon Petrochemicals Co Ltd
Application granted granted Critical
Publication of CA1236122A publication Critical patent/CA1236122A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/018—Dielectrics
    • H01G4/20—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06
    • H01G4/22—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 impregnated
    • H01G4/221—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 impregnated characterised by the composition of the impregnant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils

Abstract

ABSTRACT OF THE DISCLOSURE

An improved electrical insulating oil which is stable in refining treatment and good electrical properties are maintained under high temperature conditions, and oil-filled electrical appliances impregnated therewith.
The electrical insulating oil comprises 1,1-diarylalkenes which are represented by the following general formula (I):

Description

ELECTRICAL INSULATING OIL AND
OIL-FILLED ELECTRICAL APPLIANCES
-BACKGROUND OF THE INVENTION
5 ~1) Field of the Invention This invention relates to an electrical insulating oil and oil filled electrical appliances. More particularly, the invention relates to an electrical insulating oil which is stable in refining treatments and which can maintain its excellent electrical characteristics even under high temperature conditions, and oil filled electrical appliances that are impregnated with the same.
(2) Description of the Prior Art Electrical appliances such as oil-filled capacitors, oil-filled power cables and transformers have recently been made to withstand high electric voltages while being made small in size. With this tendency, various kinds of plastic films are used together with or in place of conventional insulating paper.
In the conventional art, refined mineral oils, polybutenes, alkylbenzenes, polychlorinated biphenyls and the like are used as electrical insulating oils; however, they have several drawbacks. For example, the use of halogenated aromatic hydrocarbons such as polychlorinated biphenyls was discontinued because it constitutes a public health hazard. Furthermore, the conventional electrical insulating oils are not satisfactorily compatible with the .

- 2 - ~ ~3~2 plastic materials such as polyolefin which are recently used in oil-filled electrical appliances.
With the requirements of durability to high-voltage and size reduction, it is necessary that the electrical insulating oil has a high dielectric breakdown voltage and a good hydrogen gas absorbing capacity.
The hydrogen gas absorbing capacity indicates the stability of the insulating oil against corona discharge (partial discharge) under high electric voltage conditions.
The higher the hydrogen gas absorbing capacity, the smaller the likelihood of corona discharge, which leads to the advantage of the insulating oil having excellent stability or durability.
Meanwhile, in order to meet the requirement of high-voltage use, plastic materials such as polyolefin, polyester and polyvinylidene fluoride are used to replace either partially or completely the conventional insulating paper as insulating materials or dielectric materials for electrical appliances such as oil-filled electric cables and capacitors. In view of their dielectric strength, dielectric loss tangent and dielectric constant, polyolefin films, especially polypropylene and polyethylene films, are preferred as the plastic films.
When these plastics, especially the polyolefins such as polypropylene, are impregnated with insulating oils, some oils cause the films to swell or dissolve to some extent. If a plastic material is swollen, the thickness of _ 3 _ ~ ~3~2 insulating layers increases and the resistance tc the flow of insulating oil increases in electrical cables, and insufficient impregnation with insulating oil occurs in electric capacitors, causing the formation of voids (unimpregnated portions), the undesirable lowering of the corona discharge voltage and the increase of the volumes of capacitors, all of which are not desirable.
In connection with the above-mentioned conventional electrical insulating oils, -the values of dielectric break-down voltages (BDV) and dielectric loss tangents (tan ~) aresatisfactory to a certain extent, but the hydrogen gas absorbing capacity or corona discharge characteristic and the stability of the dimensions of plastic films are not satisfactory.
As described above, the requirements in the use of electrical insulating oils in recent years have become so severe that even a trace quantity of impurity in an electrical insulating oil sometimes causes a problem. Accordingly, it is necessary to subject electrical insulating oils to refining before they are used for impregnation of electrical appliances.
For the refining of electrical insulating oils, solid refining agents in granular or powder form are generally employed because they are efficient and the separation of them after refining is easy. The solid refining agents are exemplified by clays such as activated clay and fuller's ear-th; silica, silica gel, aluminal ;Z 2 alumina gel, synthetic silica-alumina and activated carbon.
The refining is done by adsorbing small quantities of impurities in an electrical insulating oil with these refining agents. The refined electrical insulating oil is used preferably just after refining though the refined oil can be used after storage.
These solid refining agents, however, have the Br~nsted acid point or Lewis acid point as well as the adsorbing property. For this reason, many refining agents catalyze in chemical reactions. Accordingly, some ingre-dients in electrical insulating oils are chemically modified by the catalytic action of these solid refining agents in refining process, and thus stable and satisfactory refining ; cannot be done.
Furthermore, even though the oil-filled electrical appliances such as oil-filled capacitors are generally used at room temperature, they are sometimes used at considerably high temperatures due to climatic or other conditions in use. In large-sized capacitors, as the heat of dielectric loss is accumulated inside the capacitors, the temperature in the inner parts of capacitors sometimes becomes consider-ably high. Therefore, the uses under high temperature conditions must be taken into consideration with respect to oil-filled capacitors.
The interaction between electrical insulating oils and plastic materials at high temperatures are, however, different from the interaction at ordinary temperatures.

_ 5 _ ~ ~36~

The oil-filled capacitors impregnated with the above recently proposed electrical insulating oils are not always satisfactory at high temperatures, which is different from the uses at room temperature.
In U. S. Patent No. 4,347,169 is disclosed an electrical insulating oil comprising diarylalkanes and ; unsaturated dimers or codimers of styrenes such as styrene and ~-methylstyrene and oil-filled electrical appliances impregnated with the same. This electrical insulating oil is desirable because the compatibility with plastics is good, however, it has a defect that one of their component material such as unsaturated dimer of ~-me-thylstyrene is liable to be deteriorated by solid refining agents. In addition, the oil-filled capacitors impregnated with such 15Z an electrical insulating oil cannot always exhibit their satisfactory performances under the use conditions at high temperatures such as 80C.
BRIEF SUMMARY OF THE IN~ENTION
In v1ew of the above-described conventional state of the art, it is the primary object of the present invention to provide an improved electrical insulating oil which is stable in the treatment with solid refining agents and, as a result, which can be refined satisfactorily.
~nother object of the present invention is tc provide an electrical insulating oil which is good in the compatibility with plastics that are used as dielectric or insulating materials and which is excellent in electrical - 6 - ~ ~36~22 characteristics such as aorona discharge characteristics, to facilitate the production of small-sized and long-life electrical appliances.
A further object of the present invention is to provide an electrical insulating oil which can exhibit its full performances even under high temperature conditions.
Still a further object of the present invention is to provide an electrical insulating oil having the foregoing characteristic advantages and electrical appliances which are impregnated with the same.
According to the present invention, the electrical insulating oil and the insulating oil for use in impregna-ting electrical appliances of the invention comprises 1,1-diarylalkenes which are represented by the following general formula (I):

(R3)m~ ~

C--C
~/ \R2 (R4)n ~ ------ (I) wherein R1 to R4's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and m and n are integers from 0 to 3, inclusive.
; 25 In the refining process with a solid refining agent, the conversion rate of the above 1,1-diarylalkenes is very low and they are scarcely caused to change. For example, _ 7 - ~ ~3~2~

the conversion rate is 10% at the utmost in refining at 25C
for 30 minutes with 1% by weight of activated clay.
Furthermore, the l,l-diarylalkenes has good impregnating property and compatibility relative to plastics. Still further, electrical appliances that are impregnated with -the l,l-diarylalkenes exhibit satisfactory performances also under high temperature conditions.
DETAILED DESCRIPTION OF THE INVENTION
The l,l-diarylalkenes are exemplified by the compounds of l-methylphenyl-l-(ethylphenyl)ethylene, l-methylphenyl-l-(dimethylphenyl)ethylene, l-ethylphenyl-l-(dimethylphenyl)ethylene, l,l-diphenylbutene-l, 2-methyl-1,1-diphenylpropene-1, l,l-diphenylpentene-l and 2-methyl-1,1-diphenylbutene-1.
The above l,l-diarylalkenes can be employed singly or in combination of two or more kinds.
In view of the impregnating property to electrical appliances, the viscosity of the electrical insulating oil of the present invention is not higher than 30 cSt (3x10 5 m2jsec), and preferably lower than 20 cSt (2x10 5 m2/sec) at 40C.
Among the above-defined l,l-diarylalkenes, l,l-diarylethylenes represented by the following general formula (II) are desirable:

1'.

- 8 - ~3~

(R5)p t~

( 6)q ~ .............................. (II) wherein R5's and R6's are the same or different and each of them is a hydrogen atom or an alkyl group, p and q are integers from 0 to 3, inclusive, and the total number of carbon atoms in both the R5's of p in number and R6's of q in number is 0 to 5, inclusive. If the above total number of carbon atoms is 6 or more, the viscosity of 1,1-diaryl ethylene is too high to cause insufficient impregnation and the stability to GOrona discharge is lowered owing to the lowering of aromatic character of the compounds.
The above 1,1-diarylethylenes can also be employed singly or in combination of two or more kinds.
The 1,1-diarylethylenes are exemplified by the following compounds:

1,1-diphenylethylene, 1-phenyl-1-(methylphenyl)ethylene, 1-phenyl-1-(ethylphenyl)ethylene, 1-phenyl-1-(n-propylphenyl)ethylene, l-phenyl-1-(isopropylphenyl)ethylene, 1-phenyl-1-(methylethylphenyl)ethylene, 1-phenyl-1-(n-butylphenyl)ethylene, 1-phenyl-1-(sec-butylphenyl)ethylene, _ 9 _ ~ ~3~2~

l-phenyl-l-(isobutylphenyl)ethylene, l-phenyl-l-(tert-butylphenyl)ethylene, l-phenyl-l-(amylphenyl)ethylene, l-phenyl-l-(tert-amylphenyl)ethylene, l-phenyl-l-(dimethylphenyl)ethylene, l-phenyl-l-(trimethylphenyl)ethylene, l,l-di(methylphenyl)ethylene, l-methylphenyl-l-(dimethylphenyl)ethylene, l-methylphenyl-l-(ethylphenyl)ethylene, l-methylphenyl-l-(n-propylphenyl)ethylene, l-methylphenyl-l-(isopropylphenyl)ethylene, l-methylphenyl-l-(n-butylphenyl)ethylene, :~ l-methylphenyl-l-(isobutylphenyl)ethylene, l-methylphenyl-l-(sec-butylphenyl)ethylene, l-methylphenyl-l-(tert-butylphenyl)ethylene, l-ethylphenyl-l-(dimethylphenyl)ethylene, : l-ethylphenyl-l-(n-propylphenyl)ethylene, l-ethylphenyl-l-(isopropylphenyl)ethylene, l,l-di(dimethylphenyl)ethylene, l-dimethylphenyl-l-(n-propylphenyl)ethylene, and l-dimethylphenyl-l-(isopropylphenyl)ethylene.
The l,l-diarylalkenes of the present invention can be prepared by, for example, acylating alkylbenzene with benzoyl chloride or alkylbenzoyl chloride to obtain alkyl-benzophenone, reacting the alkylbenzophenone with a Grignard reagent such as methylmagnesium iodide to obtain diarylmethyl carbinol, and then dehydrating the diarylmethyl carbinol.

12~2 In another method, 1,1-diarylethylene can be prepared by dehydrogenating 1,1-diarylethane with a dehydro-genation ca-talyst such as iron catalyst. In this case, the alkyl groups of the starting 1,1-diarylethane are preferably those which are hardly dehydrogenated such as methyl group and tert-butyl group. Through such dehydrogenation, for example, 1-phenyl-1-(methylphenyl)ethylene can be prepared from 1-phenyl-1-(methylphenyl)ethane.
For the electrical appliances according to the present invention, other conventional electrical insulating oils can be mixed in-to the 1,1-diarylalkenes as far as general electrical properties of the latters are not impaired.
Such electrical insulating oils to be mixed are exemplified by diarylalkanes such as phenyl-tolylmethane, phenyl-ethylphenylmethane, 1-phenyl-1-tolylethane, 1-phenyl-1-xylylethane and 1-phenyl-2-(isopropylphenyl)ethane, : alkylbiphenyls such as monoisopropyl-biphenyl, alkylnaphthalenes such as diisopropylnaphthalene, diaryl ethers such as ditolyl ether, and diaralkyl ethers such as di(a-methylbenzyl)ether, as well as refined mineral oil, olefin oligomers such as polybutene, alkylbenzenes such as dodecylbenzene, phthalic esters such as dioctylphthalate, and animal and vegetable oils such as castor oil.
Furthermore, known antioxidants for use in electrical insulating oils can be added to the insulating oil of the present invention. For example, there are phenol compounds such as 2,6-di-tert-butyl-p-cresol (trademark: 8HT

2,2'-methylenebis(4-methyl-6-tert-butylphenol), 4,4'-butylidenebis(3-methyl-6-tert-butylphenol), 4,4'-thiobis(3-methyl-6-tert-butylphenol), stearyl-3-3,5-di-tert-butyl-4-hydroxyphenol)propionate (trademark: Irganox 1076), tetrakis~methylene-3(3',5'-di-tert-butyl-4'-hydroxyphenyl)-propionate]methane (trademark:
Irganox 1010), 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene (trademark: Irganox 330), and 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenol)butane (trademark: Topanol CA); sulfur compounds such as dilauryl thiodipropionate, distearyl thiodipropionate, laurylstearyl thiodipropionate, and dimyristyl thiodipropionate; and phosphorous compounds such as triisodecyl phosphite, diphenylisodecyl phosphite, triphenyl phosphite, and trinonylphenyl phosphite. The antioxidants can be added to the electrical insulating oil singly or in combination of two or more kinds. The addition quantity of the antioxidant is 0.001 to 5% by weight and preferably 0.01 to 2.0% by weight of the electrical insulating oil.
Furthermore, in order to impart a nonflammable property and other desirable properties to the electrical insulating oil of the present invention, several known additives such as phosphoric esters and epoxy compounds may be added to the electrical insulating oil.
The l,l-diarylalkenes according to the present invention are quite suitable for use in impregnating oil-filled electrical appliances such as oil-filled capacitors, .~

- 12 - ~ ~3~

oil-filled cables and transformers. Especially, when oil-filled electrical appliances having dielectric materials or electrical insulating materials -that are made partially or totally of plastics, are impregnated with the electrical insulating oil of the present invention, the electrical appliances have excellent corona discharge characteristic because the hydrogen absorbing capacity of the electrical insulating oil of the invention is high due to its aromatic olefinic feature. In addition, the electrical insulating oil is advantageous in that the tendency to swell plastics is small, wherein preferable plastics are polyolefins, especially polypropylene.
In the above-described capacitors, an electrode of ; a metallic conductor made of a metal foil such as aluminum foil and a dielectric material made of a plastic film or a laminate of a plastic film nd paper are superposed and wound together to form a capacitor element. The plastic films used for this purpose are polyolefin films such as polypropylene, polyethylene and polymethylpentene films;
polyester film and polyvinylidene fluoride film. Among them, the polyolefin films, especially polypropylene film, are preferable because the compatibility with 1,1-diaryl-alkenes is quite good even though they are not expensive.
The electrical insulating oil of the present invention can also be used for capacitors in which metallized paper or metallized plastic films are wound. The metallized paper or the metallized film can be made by applying a metallic .~

~ 6~

layer of aluminum, zinc or else as an electrode layer by vacuum evaporation coating. The thus formed capacitor elements can be impregnated with the electrical insulating oil of the present invention in accordance with the conventional method.
In some oil-filled cables, insulation tapes are wound around electric conductors that are made of copper or aluminum. The insulation tapes used for this purpose are made of insulating paper, polyolefins such as polypropylene, polyethylene and polymethylpentene; polyester, polyvinylidene fluoxide, composite materials that are made by laminating insulating paper with polyolefins such as polypropylene by melt-extrusion, and the lamination of insulating paper and silane-grafted polyolefin. Among them, preferable tapes are those in which polyolefin such as polypropylene is used at least partially. The thus produced cable elements can be impregnated with the electrical insulating oil of the present invention in accordance with the conventional method to obtain oil-filled cables.
In the following, the present invention will be described in more detail with reference to several examples.
Example 1 An activated clay (trademark: Galleonite #236, made by Mizusawa Industrial Chemicals Co., Ltd.) having the following properties was dried at 130C for lS hours.
This activated clay is commercially available as an agent for refining electrical insulating oils. Five grams of this ,.~

- 14 - ~3~

activated clay was added respectively to each 500 g of three kinds of aromatic olefins, 1,1-diphenylethylene, 1-phenyl-1-(4-methylphenyl)ethylene and 1-phenyl-1-(3,4-dimethylphenyl)ethylene.
Refining was carried ou-t by stirring them at room temperature (25C) for 30 minutes. After that, the changes in compositions caused to occur during the treatment were determined by gas chromatography and gel permeation chromato-graphy, however, neither change in composition nor generation of polymer was observed in any compound. Accordingly, it was understood that the aromatic olefins were scarcely converted in this treatment.
Properties of Activated Clay Specific surface area (m2/g): 260 - 300 Surface acidity (m.mol/g):
pKa +1.5 0.47 - 0.53 pKa +1.5 - pKa +3.3 0.06 - 0.07 pKa ~3.3 - pKa +4.8 0.64 - 0.72 pH of 5% suspension 2.5 - 3.5 Chemical composition (% by weight) SiO2 70 - 85 Al23 5 - 14 Others 25 -(Fe2O3, MgO, CaO, etc.) After the refining, electrical characteristics of these aromatic olefins were determined, the results of which are shown in the following Table 1.

~.~3~

~ Tests on Oil-Filled Capacitors A two-ply polypropylene film (thickness of each layer: 14 microns) as a dielectric material and aluminum foil as an electrode were wound together according to the conventional method to obtain model capacitor elements for oil impregnation.
Ten of these model capacitor elements were impregnated with each of the foregoing refined aromatic olefins in vacuum according to the conventional method to prepare oil-filled capacitors. Electrostatic capacitances of these capacitors were about 0.4 ,uF. When the refined aromatic olefins were used for impregnation, 0.2~ by weight ~ of 2,6-di-tert-butyl-p-cresol as an antioxidant was added to ; the aromatic olefins.
: 15 An electric voltage of 2800 V was applied to the above obtained oil-filled capacitors at room tempera-ture so as to determine their life span. However, any of capacitors were not broken down during the voltage application for 500 hours.
: 20 Comparative Example 1 2,4-Diphenyl-4-methylpentene-1 (unsaturated linear dimer of ~-methylstyrene) was subjected to treatment with the activated clay in the like manner as Example 1. In this : treatment, cyclic saturated compounds and polymers were produced and the conversion rate of the olefin was 95~.
Furthermore, similar treatment was applied to 1-phenyl-1-(4-vinylphenyl)ethane, in which the greater part .

- 16 - ~ 2 of this olefin was converted into polymers.
That is, when -the above -two kinds of aromatic olefins were refined using clay in the like manner as Example 1 by the conventional method, the viscosities of them became high, impregnating property was lowered, and olefin contents were extremely lowered. Thus, the effect as electrical insulating oils of these aromatic olefins could not be produced.
Example 2 and Comparative Example 2 In Example 2, 1-phenyl-1-(4-methylphenyl)ethylene (Insulating Oil 1) and 1-phenyl-1-(3,4-dim~thylphenyl)ethylene (Insulating Oil 2) were used. In Comparative Example 2, 1-phenyl-1-xylylethane (Insulating Oil 3), benzyltoluene (Insulating Oil 4) and monoisopropyl biphenyl (Insulating I5 Oil 5) were used. They were refined with clay treatment according to the refining process in Example 1.
The properties of these obtained insulating oils are shown in the following Table 1. By the way, 0.2~ by weight of BHT as an antioxidant was added to the above insulating oils before use.
Then, a two-ply polypropylene film (thickness of each layer: 14 m1crons) as a dielectric material and aluminum foil as an electrode were wound together according to the conventional method to obtain model capacitor elements for oil impregnation.
These model capacitor elements were impregnated with each of the foregoing insulating oils in vacuum ~ 17 ~ %2 according to the conventional method to prepare oil-filled capacitors of about 0.4 ,uF in electrostatic capacitance.
Electric voltages were applied to the above obtained oil-filled capacitors at 80C and corona starting voltages (CSV) and corona ending voltages (CEV) were determined.
Meanwhile, other oil-filled capacitors prepared likewise were applied with a constant alternating voltage at 80C until the capacitors were broken to determine the life span of capacitors~ Each value of breakdown time was calcu-lated such that 14 capacitors impregnated with one insulating oil were tested and two maximum values and two minimum values were neglected and the average of the other 10 breakdown times was adopted as a resultant value. ~he breakdown times are indicated by relative values on the base value 1.0 of Insulating Oil 3. The results are also shown in Table 2.
From the results on Table 2, it will be understood that the oil-filled capacitors according to the present invention have very long life at high temperatures as compared with the capacitors impregnated with the phenyl xylylethane or else. Furthermore, the oil-filled capacitors of the present invention were, of course, useful at room temperature.

_ ~ o o ~ ~ ~ .
'~ o o o o o U~
O 'O er o o o ~ o ~X ~`
E ~1 ~X _ ~ ~ ~ o ~ ~ ~ ~ o ~ ~ In ~ O o o O O Lr .~ 0 ~`1 o o o Q o ~1 t`
h ~1 _ E o u O ~ ~g a~ oLl a) ,_~ o ~
C~ o a~ o o ~ O ~ ~r ~1 . . . O o X
O ul o o oQ o o ~`
In _ I ~ ~ U~
~ ~ l ~ ~1 ,iI Ql O ~r o o ~1 a) ~ o _~~1 ~ a) ~ o o o ~ o ~ r~~ ~ S~ ~ . . . O o X
1~ co ~ O o Q .
a~~ , . r- ~ o u~
,_1~ ~E ~: X
,Q ~
~a _ E~
,~ U~
I a) o ~ h a) ~ o ~i -I ~ O ~ O O O ~> O ~1 ~D
Q~ ~: ` ~r c:~ O O O X
. . oP .
~, . ~r ~1 O ~ 1 O
Q~

I I ~ ~9 Lr I a) ('') ~J o ~ a) ~ o ~r ~--~ [` O O O~ O
') ~ o ,Qa o X~ t`
~a) ~r ~ _ _ / ~ ~ ~) r1 / ~ ~ ~ O ~ O ^ JJO O
~ O / C~ ~ ~ ~ ,1 ~ ~ ,1 0 ~1 o .,.
r~l / ~J ~ ~.) ~ ~ S~ 3 E~ S-l ~ ~~ ;) ~1 ~
~ / ~ rl ~rl ~~ O ~) O a~ ~ o.,~ ,~ ~ ~ ~::
u~ / ~ (~4~ 1~ ?~; ~ ~ co ~ U ta ~ / ~ E~ o ~ ~ ~ a) ~ ~ (D ~
H/ U~O O ~JO 11~ 'C; `.-1 ta ~ ~ ~ ~ 1 0 r~
/ ~ c~O ~~1 ~) a~ o ~1 ~ a) u~ ~ ~ (V ~::
E-/ ~1 rl O Ql ~ O ~ rl ~ O ~ ~1 0 o~O Ql O a) C~ ~rl o ~ > _ u~ ~ ~a m :>-- ~ ,~ _ ~Q ~ x-- a c~

- 19 ~ 6~2 T a b 1 e 2 _ \ Insul. Example 2 Comparative Example 2 ~Il,V~ c~4,0 4 0 3 6 C V 3 1 3.0 2.8 2.9 2.8 (kV, @80C) Breakdown42 5 37.2 1.0 0.2 0.9 Time(@80C) _

Claims (17)

WHAT IS CLAIMED IS:
1. An electrical insulating oil comprising at least one of 1,1-diarylalkenes which are represented by the following general formula (I):

....... (I) wherein R1 to R4's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and m and n are integers from 0 to 3, inclusive.
2. The electrical insulating oil in Claim 1, wherein said 1,1-diarylalkenes are 1,1-diarylethylenes represented by the following general formula (II):

....... (II) wherein R5's and R6's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, p and q are integers from 0 to 3, inclusive, and the total number of carbon atoms in both the R5's of p in number and R6's of q in number is 0 to 5, inclusive.
3. The electrical insulating oil in Claim 2, wherein said 1,1-diarylethylenes are at least one member selected from the group consisting of 1,1-diphenylethylene, 1-phenyl-1-(methylphenyl)ethylene and 1-phenyl-1-(dimethyl-phenyl)ethylene.
4. The electrical insulating oil in Claim 1, wherein said electrical insulating oil is the one for use in impregnating oil-filled electrical appliances.
5. The electrical insulating oil in Claim 4, wherein at least one part of the dielectric material or insulating material of said electrical appliance comprises a plastic material.
6. The electrical insulating oil in Claim 5, wherein said plastic material is polyolefin.
7. The electrical insulating oil in Claim 6, wherein said polyolefin is polypropylene.
8. The electrical insulating oil in Claim 4, wherein said oil-filled electrical appliances are oil-filled capacitors.
9. The electrical insulating oil in Claim 8, wherein said oil-filled capacitors are those produced by using capacitor elements in which at least one sheet of plastic film is wound together with a metal conductor.
10. Electrical appliances impregnated with an electrical insulating oil comprising at least one of 1,1-diarylalkenes which are represented by the following general formula (I):

....... (I) wherein R1 to R4's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and m and n are integers from 0 to 3, inclusive.
11. The electrical appliances in Claim 10, wherein said 1,1-diarylalkenes are 1,1-diarylethylenes represented by the following general formula (II):

....... (II) wherein R5's and R6's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, p and q are integers from 0 to 3, inclusive, and the total number of carbon atoms in both the R5's of p in number and R6's of q in number is 0 to 5, inclusive.
12. The electrical appliances in Claim 11, wherein said 1,1-diarylethylenes are at least one member selected from the group consisting of 1,1-diphenylethylene, 1-phenyl-1-(methylphenyl)ethylene and 1-phenyl-1-(dimethyl-phenyl)ethylene.
13. The electrical appliances in Claim 10, wherein at least one part of the dielectric material or insulating material of said electrical appliance comprises a plastic material.
14. The electrical appliances in Claim 13, wherein said plastic material is polyolefin.
15. The electrical appliances in Claim 14, wherein said polyolefin is polypropylene.
16. The electrical appliances in Claim 10, wherein said oil-filled electrical appliances are oil-filled capacitors.
17. The electrical appliances in Claim 16, wherein said oil-filled capacitors are those produced by using capacitor elements in which at least one sheet of plastic film is wound together with a metal conductor.
CA000475726A 1984-03-08 1985-03-05 Electrical insulating oil and oil-filled electrical appliances Expired CA1236122A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59-44951 1984-03-08
JP59044951A JPS60189108A (en) 1984-03-08 1984-03-08 Electrically insulating oil and oil-immersed electric device

Publications (1)

Publication Number Publication Date
CA1236122A true CA1236122A (en) 1988-05-03

Family

ID=12705792

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000475726A Expired CA1236122A (en) 1984-03-08 1985-03-05 Electrical insulating oil and oil-filled electrical appliances

Country Status (5)

Country Link
US (1) US4618914A (en)
EP (1) EP0158809B1 (en)
JP (1) JPS60189108A (en)
CA (1) CA1236122A (en)
DE (1) DE3567985D1 (en)

Families Citing this family (135)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2514004B2 (en) * 1986-09-04 1996-07-10 日本石油化学株式会社 Novel electrical insulating oil composition
JPH088010B2 (en) * 1986-09-04 1996-01-29 日本石油化学株式会社 Electrical insulating oil composition
JPH07100679B2 (en) * 1987-03-12 1995-11-01 日本石油化学株式会社 Process for producing α- (3-benzoylphenyl) propionic acid or its ester
US4931843A (en) * 1988-10-18 1990-06-05 Bernhard Goetz High voltage measurement capacitor
US4879628A (en) * 1988-10-18 1989-11-07 Bernhard Goetz High voltage measurement capacitor
US5075820A (en) * 1990-08-06 1991-12-24 Motorola, Inc. Circuit components having different characteristics with constant size
JPH04171804A (en) * 1990-11-05 1992-06-19 Murata Mfg Co Ltd Electric double-layer capacitor
DK0585363T3 (en) 1991-05-14 1995-09-04 Ecolab Inc Chemical concentrate consisting of two parts
US6673765B1 (en) 1995-05-15 2004-01-06 Ecolab Inc. Method of making non-caustic solid cleaning compositions
US6037537A (en) 1995-12-21 2000-03-14 Cooper Industries, Inc. Vegetable oil based dielectric coolant
US5766517A (en) * 1995-12-21 1998-06-16 Cooper Industries, Inc. Dielectric fluid for use in power distribution equipment
US6398986B1 (en) * 1995-12-21 2002-06-04 Cooper Industries, Inc Food grade vegetable oil based dielectric fluid and methods of using same
US6352655B1 (en) 1995-12-21 2002-03-05 Cooper Industries, Inc. Vegetable oil based dielectric fluid
US6280659B1 (en) * 1996-03-01 2001-08-28 David W. Sundin Vegetable seed oil insulating fluid
US6177392B1 (en) 1997-01-13 2001-01-23 Ecolab Inc. Stable solid block detergent composition
US6150324A (en) 1997-01-13 2000-11-21 Ecolab, Inc. Alkaline detergent containing mixed organic and inorganic sequestrants resulting in improved soil removal
US6258765B1 (en) 1997-01-13 2001-07-10 Ecolab Inc. Binding agent for solid block functional material
US6156715A (en) 1997-01-13 2000-12-05 Ecolab Inc. Stable solid block metal protecting warewashing detergent composition
US6010729A (en) 1998-08-20 2000-01-04 Ecolab Inc. Treatment of animal carcasses
US6234343B1 (en) 1999-03-26 2001-05-22 Papp Enterprises, Llc Automated portable medication radial dispensing apparatus and method
US6638902B2 (en) 2001-02-01 2003-10-28 Ecolab Inc. Stable solid enzyme compositions and methods employing them
US6632291B2 (en) 2001-03-23 2003-10-14 Ecolab Inc. Methods and compositions for cleaning, rinsing, and antimicrobial treatment of medical equipment
US7153820B2 (en) * 2001-08-13 2006-12-26 Ecolab Inc. Solid detergent composition and method for solidifying a detergent composition
US6916773B2 (en) * 2002-07-31 2005-07-12 Ecolab, Inc. Non-surfactant solubilizing agent
US7008911B2 (en) * 2002-09-06 2006-03-07 Ecolab, Inc. Non-surfactant solubilizing agent
US6900167B2 (en) 2002-10-09 2005-05-31 Ecolab, Inc. Solid composition with rheology modifier
FR2848016B1 (en) * 2002-11-29 2005-01-28 Nexans FLAME RETARDANT
US6903062B2 (en) * 2002-12-19 2005-06-07 Ecolab, Inc. Rheology modifier concentrate
US6767881B1 (en) 2003-03-19 2004-07-27 Ecolab, Inc. Cleaning concentrate
US7196044B2 (en) * 2003-07-02 2007-03-27 Ecolab, Inc. Warewashing composition for use in automatic dishwashing machines, comprising a zinc ion and aluminum ion corrosion inhibitor
US7135448B2 (en) 2003-07-02 2006-11-14 Ecolab Inc. Warewashing composition for use in automatic dishwashing machines, comprising a mixture of aluminum and zinc ions
US7279455B2 (en) * 2003-11-06 2007-10-09 Ecolab, Inc. Rinse aid composition and method of rising a substrate
US7423005B2 (en) * 2003-11-20 2008-09-09 Ecolab Inc. Binding agent for solidification matrix
US7442679B2 (en) * 2004-04-15 2008-10-28 Ecolab Inc. Binding agent for solidification matrix comprising MGDA
AU2004319508A1 (en) 2004-04-24 2005-11-17 Inrange Systems, Inc. Universal medication carrier
ES2747926T3 (en) * 2004-09-27 2020-03-12 Special Water Patents B V Methods and compositions for water treatment
US8674021B2 (en) 2006-07-21 2014-03-18 Akzo Nobel N.V. Sulfonated graft copolymers
US7759299B2 (en) * 2006-07-24 2010-07-20 Ecolab Inc. Warewashing composition for use in automatic dishwashing machines
US8075857B2 (en) 2006-10-18 2011-12-13 Ecolab Usa Inc. Apparatus and method for making a peroxycarboxylic acid
US7547421B2 (en) 2006-10-18 2009-06-16 Ecolab Inc. Apparatus and method for making a peroxycarboxylic acid
US8093200B2 (en) 2007-02-15 2012-01-10 Ecolab Usa Inc. Fast dissolving solid detergent
US7888303B2 (en) * 2007-05-04 2011-02-15 Ecolab Inc. Solidification matrix
US7763576B2 (en) 2008-01-04 2010-07-27 Ecolab Inc. Solidification matrix using a polycarboxylic acid polymer
CA2681890C (en) 2007-05-04 2017-05-16 Ecolab Inc. Water soluble magnesium compounds as cleaning agents and methods of using them
US7893012B2 (en) 2007-05-04 2011-02-22 Ecolab Inc. Solidification matrix
US8338352B2 (en) * 2007-05-07 2012-12-25 Ecolab Usa Inc. Solidification matrix
US7828907B2 (en) * 2007-05-09 2010-11-09 Ecolab Inc. Detergent component for preventing precipitation of water hardness and providing soil removal properties
US20110108068A1 (en) * 2007-05-25 2011-05-12 Ecolab Usa Inc. Enhanced melting point rinse aid solids
US7521412B2 (en) * 2007-05-25 2009-04-21 Ecolab Inc. Dimensionally stable solid rinse aid
US8383570B2 (en) 2007-05-25 2013-02-26 Ecolab Usa Inc. Enhanced melting point rinse aid solid compositions with synergistic preservative
US7759300B2 (en) 2007-07-02 2010-07-20 Ecolab Inc. Solidification matrix including a salt of a straight chain saturated mono-, di-, or tri- carboxylic acid
US8759269B2 (en) * 2007-07-02 2014-06-24 Ecolab Usa Inc. Solidification matrix including a salt of a straight chain saturated mono-, di-, and tri- carboxylic acid
AU2008313267B2 (en) 2007-10-18 2013-09-19 Ecolab Inc. Pressed, waxy, solid cleaning compositions and methods of making them
US8138138B2 (en) * 2008-01-04 2012-03-20 Ecolab Usa Inc. Solidification matrix using a polycarboxylic acid polymer
US8198228B2 (en) * 2008-01-04 2012-06-12 Ecolab Usa Inc. Solidification matrix using an aminocarboxylate
US8772221B2 (en) 2008-01-04 2014-07-08 Ecolab Usa Inc. Solidification matrices using phosphonocarboxylic acid copolymers and phosphonopolyacrylic acid homopolymers
US7645731B1 (en) 2009-01-08 2010-01-12 Ecolab Inc. Use of aminocarboxylate functionalized catechols for cleaning applications
CN102292428B (en) 2009-01-30 2014-06-04 埃科莱布有限公司 Development of an aluminum hydroxycarboxylate builder
US20100197545A1 (en) 2009-01-30 2010-08-05 Ecolab USA High alkaline detergent composition with enhanced scale control
ES2894283T3 (en) 2009-05-12 2022-02-14 Ecolab Usa Inc Fast-drying, fast-draining polish
EP3480132A1 (en) 2009-05-28 2019-05-08 Ecolab USA Inc. Wetting agents for aseptic filling
US8883035B2 (en) * 2009-07-27 2014-11-11 Ecolab Usa Inc. Formulation of a ware washing solid controlling hardness
US20110021410A1 (en) * 2009-07-27 2011-01-27 Ecolab Usa Inc. Novel formulation of a ware washing solid controlling hardness
WO2011025624A1 (en) 2009-07-31 2011-03-03 Akzo Nobel N.V. Graft copolymers
US8216989B2 (en) 2009-08-26 2012-07-10 Ecolab Usa Inc. Cleaning composition for removing/preventing redeposition of protein soils
US20140014137A1 (en) 2009-09-18 2014-01-16 Ecolab Usa Inc. Treatment of non-trans fats with acidic tetra sodium l-glutamic acid, n, n-diacetic acid (glda)
US8389463B2 (en) * 2009-11-09 2013-03-05 Ecolab Usa Inc. Enhanced dispensing of solid compositions
US8530403B2 (en) * 2009-11-20 2013-09-10 Ecolab Usa Inc. Solidification matrix using a maleic-containing terpolymer binding agent
US20110124547A1 (en) * 2009-11-23 2011-05-26 Ecolab Inc. Solidification matrix using a sulfonated/carboxylated polymer binding agent
US20110180112A1 (en) 2010-01-22 2011-07-28 Ecolab USA Method of removing/preventing redeposition of protein soils
US8399393B2 (en) 2010-05-03 2013-03-19 Ecolab Usa Inc. Combination of soluble lithium salt and soluble aluminum or silicate salt as a glass etching inhibitor
US8802611B2 (en) 2010-05-03 2014-08-12 Ecolab Usa Inc. Highly concentrated caustic block for ware washing
US9388369B2 (en) 2010-08-20 2016-07-12 Ecolab Usa Inc. Wash water maintenance for sustainable practices
US8975221B2 (en) 2010-08-27 2015-03-10 Ecolab Usa Inc. Use of sugars in a stabilization matrix and solid compositions
US20120231990A1 (en) 2011-03-10 2012-09-13 Ecolab Usa Inc. Solidification matrix using a carboxymethyl carbohydrate polymer binding agent
ES2651670T3 (en) 2011-03-17 2018-01-29 Ecolab Usa Inc. Composition and procedure for continuous or intermittent removal of waste from a recirculated wash solution
BR112013028007A2 (en) 2011-05-20 2017-01-10 Ecolab Usa Inc non-phosphate detergents and non-phosphoric acids in an alternating system alkalinity / acidity for dishwashing
US8758520B2 (en) 2011-05-20 2014-06-24 Ecolab Usa Inc. Acid formulations for use in a system for warewashing
US8853144B2 (en) 2011-08-05 2014-10-07 Ecolab Usa Inc. Cleaning composition containing a polysaccharide graft polymer composition and methods of improving drainage
US8636918B2 (en) 2011-08-05 2014-01-28 Ecolab Usa Inc. Cleaning composition containing a polysaccharide hybrid polymer composition and methods of controlling hard water scale
US8679366B2 (en) 2011-08-05 2014-03-25 Ecolab Usa Inc. Cleaning composition containing a polysaccharide graft polymer composition and methods of controlling hard water scale
US8841246B2 (en) 2011-08-05 2014-09-23 Ecolab Usa Inc. Cleaning composition containing a polysaccharide hybrid polymer composition and methods of improving drainage
BR112014009040A2 (en) 2011-11-04 2017-05-09 Akzo Nobel Chemicals Int Bv copolymer obtainable by polymerizing at least one first ethylenically unsaturated monomer and at least one second ethylenically unsaturated monomer; copolymer composition; and process for preparing dendrite copolymer
BR112014008874A2 (en) 2011-11-04 2017-04-25 Akzo Nobel Chemicals Int Bv dendrite hybrid copolymer composition
WO2013088266A1 (en) 2011-12-13 2013-06-20 Ecolab Usa Inc. Concentrated warewashing compositions and methods
US8623151B2 (en) 2012-03-23 2014-01-07 Ecolab Usa Inc. Terpolymer containing maleic acid, vinyl acetate, and alkyl acrylate monomers for aluminum protection
US8740993B2 (en) 2012-03-23 2014-06-03 Ecolab Usa Inc. Method for reduced encrustation of textiles using a polymer comprising maleic acid, vinyl acetate, and alkyl acrylate
US9011610B2 (en) 2012-06-22 2015-04-21 Ecolab Usa Inc. Solid fast draining/drying rinse aid for high total dissolved solid water conditions
US9567551B2 (en) 2012-06-22 2017-02-14 Ecolab Usa Inc. Solid rinse aid composition and method of making same
US8945314B2 (en) 2012-07-30 2015-02-03 Ecolab Usa Inc. Biodegradable stability binding agent for a solid detergent
WO2014021902A1 (en) 2012-08-03 2014-02-06 Ecolab Usa Inc. Biodegradable stability binding agent for a solid detergent
US10253281B2 (en) 2012-08-20 2019-04-09 Ecolab Usa Inc. Method of washing textile articles
US8888924B2 (en) 2012-08-24 2014-11-18 Ecolab Usa Inc. Freestanding detergent composition not requiring an automated dispenser
US9574163B2 (en) 2012-10-26 2017-02-21 Ecolab Usa Inc. Caustic free low temperature ware wash detergent for reducing scale build-up
US9394508B2 (en) 2012-10-26 2016-07-19 Ecolab Usa Inc. Phosphorus free low temperature ware wash detergent for reducing scale build-up
US8802617B2 (en) 2012-11-08 2014-08-12 Ecolab Usa Inc. Polyglycerol graft polymers with low concentrations of carboxylic acid containing monomers and their applications
JP2016505657A (en) 2012-11-28 2016-02-25 エコラボ ユーエスエー インコーポレイティド Stabilization of bubbles with polyethylenimine ethoxylate.
CN103911225B (en) 2013-01-04 2017-12-12 艺康美国股份有限公司 Solid tablet unit dose stove cleaning agent
WO2015030836A1 (en) 2013-08-27 2015-03-05 Ecolab Usa Inc. Solid rinse aid composition and method of making same
US9127235B2 (en) 2013-10-09 2015-09-08 Ecolab Usa Inc. Alkaline detergent composition containing a carboxylic acid/polyalkylene oxide copolymer for hard water scale control
US9127236B2 (en) 2013-10-09 2015-09-08 Ecolab Usa Inc. Alkaline detergent composition containing a carboxylic acid terpolymer for hard water scale control
US9267096B2 (en) 2013-10-29 2016-02-23 Ecolab USA, Inc. Use of amino carboxylate for enhancing metal protection in alkaline detergents
JP2017503061A (en) 2013-11-11 2017-01-26 エコラボ ユーエスエー インコーポレイティド Multi-purpose enzyme detergent and method for stabilizing use solution
US9353335B2 (en) 2013-11-11 2016-05-31 Ecolab Usa Inc. High alkaline warewash detergent with enhanced scale control and soil dispersion
US20150252310A1 (en) 2014-03-07 2015-09-10 Ecolab Usa Inc. Alkyl amides for enhanced food soil removal and asphalt dissolution
US9365805B2 (en) 2014-05-15 2016-06-14 Ecolab Usa Inc. Bio-based pot and pan pre-soak
US11118140B2 (en) 2014-08-29 2021-09-14 Ecolab Usa Inc. Solid rinse aid composition comprising polyacrylic acid
WO2016079110A2 (en) 2014-11-19 2016-05-26 Novozymes A/S Use of enzyme for cleaning
US9670438B2 (en) 2015-01-29 2017-06-06 Ecolab Usa Inc. Composition and method for the treatment of sunscreen stains in textiles
US10550354B2 (en) 2015-05-19 2020-02-04 Ecolab Usa Inc. Efficient surfactant system on plastic and all types of ware
WO2017011158A1 (en) 2015-07-14 2017-01-19 Ecolab Usa Inc. Controlled rate of foam breakage in hard surface cleaners
ES2839198T3 (en) 2015-08-21 2021-07-05 Ecolab Usa Inc Pyrithione preservative system in solid brightener products
CN106701351A (en) 2015-11-12 2017-05-24 艺康美国股份有限公司 Low-foaming vessel cleaning agent and mixed cationic/nonionic surfactant system for enhancing removal of oil-containing dirt
US9670433B1 (en) 2015-12-28 2017-06-06 Ecolab Usa Inc. Hard surface cleaning compositions
US10392587B2 (en) 2016-05-23 2019-08-27 Ecolab Usa Inc. Reduced misting alkaline and neutral cleaning, sanitizing, and disinfecting compositions via the use of high molecular weight water-in-oil emulsion polymers
AU2017269273B2 (en) 2016-05-23 2019-06-20 Ecolab Usa Inc. Reduced misting acidic cleaning, sanitizing, and disinfecting compositions via the use of high molecular weight water-in-oil emulsion polymers
EP3589125A1 (en) 2017-03-01 2020-01-08 Ecolab USA, Inc. Reduced inhalation hazard sanitizers and disinfectants via high molecular weight polymers
JP6955030B2 (en) 2017-04-27 2021-10-27 エコラボ ユーエスエー インコーポレイティド Solid Control Release Carbonate Detergent Composition
JP7074845B2 (en) 2017-09-29 2022-05-24 エコラボ ユーエスエー インコーポレイティド Use of extended surfactants in process membrane cleaning
EP3710569A1 (en) 2017-11-14 2020-09-23 Ecolab USA Inc. Solid controlled release caustic detergent compositions
KR20200140243A (en) 2018-01-26 2020-12-15 에코랍 유에스에이 인코퍼레이티드 Solid cleaning composition
JP7404245B2 (en) 2018-01-26 2023-12-25 エコラボ ユーエスエー インコーポレイティド Solidification of liquid amine oxide, betaine, and/or sultaine surfactants using binders and optional carriers
JP2021511427A (en) 2018-01-26 2021-05-06 エコラボ ユーエスエー インコーポレイティド Solidification of Liquid Amine Oxides, Betaines, and / or Sultaine Surfactants Using Carriers
CA3089557A1 (en) 2018-01-26 2019-08-01 Ecolab Usa Inc. Solidifying liquid anionic surfactants
US11155769B2 (en) 2018-07-25 2021-10-26 Ecolab Usa Inc. Rinse aid formulation for cleaning automotive parts
CA3140905A1 (en) 2019-06-21 2020-12-24 Ecolab Usa Inc. Solid nonionic surfactants compositions
WO2021003388A1 (en) 2019-07-02 2021-01-07 Colonial Chemical, Inc. Nonionic functionalized poly alkyl glucosides as enhancers for food soil removal
US11845910B2 (en) 2019-07-03 2023-12-19 Ecolab Usa Inc. Hard surface cleaning compositions with reduced surface tension
CA3146010A1 (en) 2019-07-12 2021-01-21 Ecolab Usa Inc. Reduced mist alkaline cleaner via the use of alkali soluble emulsion polymers
CN114207101A (en) 2019-07-31 2022-03-18 埃科莱布美国股份有限公司 Deliming composition free of personal protective equipment
US11518961B2 (en) 2019-09-27 2022-12-06 Ecolab Usa Inc. Concentrated 2 in 1 dishmachine detergent and rinse aid
FR3101476B1 (en) 2019-10-01 2021-09-24 Arkema France Dielectric fluid for transformer retrofilling
FR3101477B1 (en) 2019-10-01 2021-09-24 Arkema France INCREASING THE POWER OF A TRANSFORMER
WO2022221670A2 (en) 2021-04-15 2022-10-20 Ecolab Usa Inc. Enzymatic floor cleaning composition
WO2024020975A1 (en) 2022-07-29 2024-02-01 Ecolab Usa Inc. Non-oxidizing 2 in 1 cleaning and sanitizing foaming compositions

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578207A (en) * 1949-06-16 1951-12-11 Universal Oil Prod Co Di-(alkylphenyl)-alkenes
US3483452A (en) * 1968-09-11 1969-12-09 Hercules Inc Capacitors with polypropylene film and liquid dielectrics
JPS5744005B2 (en) * 1972-12-27 1982-09-18
JPS5682502A (en) * 1979-12-10 1981-07-06 Nippon Petrochemicals Co Ltd Oillimmersed electric device
FR2514935A1 (en) * 1981-10-16 1983-04-22 Rhone Poulenc Spec Chim Dielectric fluid contg. methyl di:phenyl pentene - useful e.g. in capacitors, transformers etc.
CA1194284A (en) * 1982-09-16 1985-10-01 Atsushi Sato Electrical insulating oil and oil-filled electrical appliances
CA1211761A (en) * 1982-12-25 1986-09-23 Atsushi Sato Electrical insulating substance and oil-filled electrical appliances containing the same
JPH0640442B2 (en) * 1983-12-30 1994-05-25 日本石油化学株式会社 New electrical insulating oil

Also Published As

Publication number Publication date
JPS60189108A (en) 1985-09-26
US4618914A (en) 1986-10-21
DE3567985D1 (en) 1989-03-02
EP0158809A1 (en) 1985-10-23
EP0158809B1 (en) 1989-01-25
JPH0566684B2 (en) 1993-09-22

Similar Documents

Publication Publication Date Title
CA1236122A (en) Electrical insulating oil and oil-filled electrical appliances
CA1236121A (en) Electrical insulating oil and electrical appliances impregnated with the same
CA1203976A (en) Refined electrical insulating oil and oil-filled electrical appliances
US4347169A (en) Electrical insulating oil and oil-filled electrical appliances
US4543207A (en) Electrical insulating oil and oil-filled electrical appliances
EP0115065B1 (en) Process for preparing oil-containing electrical appliances
EP0172537A1 (en) New electrical insulating oil and oil-filled electrical appliances
US4591948A (en) Oil-filled capacitor
CA1154836A (en) Electric device comprising impregnated insulating materials and electric elements
US4716084A (en) Oil-impregnated capacitor
JPS6329767B2 (en)
JPH0563883B2 (en)
JPS634284B2 (en)
EP0171081B1 (en) Oil-filled capacitor
JPS634285B2 (en)
JPH0435843B2 (en)
EP0281162B1 (en) Method for improving the electrical insulating characteristics of a fraction, electrical insulating substance, and electrical appliances containing the same
JPS6213763B2 (en)
US4873611A (en) Electrically insulating fluids
JPS6155806A (en) Immersed capacitor
JPS6329768B2 (en)
JPH0326482B2 (en)
JPS6329766B2 (en)

Legal Events

Date Code Title Description
MKEX Expiry