DE2002333B2 - ELECTRIC CONTACT GREASE - Google Patents

Description

2. Electrical contact grease according to claim 1, characterized in that it is barium soap. Lithium case and aluminum soap according to the formulas Ba (RCOO) ₂ . Contains Li (RCOO) and Al (RCOO) ₃ , where R is an alkyl radical having 12 to 20 carbon atoms.

3. Electrical contact grease according to claim 1. characterized in that it is used as a chlorinated aromatic hydrocarbon or as a derivative a chlorinated aromatic hydrocarbon trichlorodiphenyl. Tetrachlorodiphenvl. Pentachiorodiphenyl. Hexachlorodiphenyl. Polychlorotriphenyl. Penlachlorodiphenyl oxide. Pentachlorophenyl benzoate, May contain hexachlorodiphenyl methane and pentachlorodiphenyl ketone.

4. Electrical contact grease according to claim 1, characterized in that it is as an antioxidant 0.01 to 3.0 percent by weight of n-butylp - aminophenol. Di - see. - butyl - ρ - phenylenediamine. ^ '- Tetramethyldiaminodiphenylmethane. / χ - naphthylamine. nn '- disalicylidene - 1.2 - propylenediamine. 2.6 - Di - tert. - butyl - phenol. 2,4-dimethyl-6-tert. - butv! phenol. 2.6 - Ditert-butylp-cresol. 4.4 '- methylene - bis - (2.6 - dl - tert-butylphenol). 2.2 '- methylene - bis - (4 · methyl-6-teit.-butyiphenol). 4.4 '- Butyhden-nis- (2methyl-6-tert-butylphenol) may contain.

5. Electrical contact grease according to claim 1, characterized in that it is 0.01 to 4.0 percent by weight sorbitan monooleate, a salt of Dinonylnaphthalinsiilfonat.es or iV '(2-carboxyphene <> xy) -stearinsäurecntha ^| tcn can.

The present invention relates to an electrical contact grease, which is particularly suitable for Nct / schallci of electrical machines and devices.

The usual electrical contacts, ζ, Θ, in televisions and radios, are subject to a versa; and a welding of the contact and are therefore responsible for disturbances such as sound disturbances, picture disturbances, failure of the contact opening, etc.

These disturbances can be avoided to a certain extent by using the previous ones electrical contact grease. Their application is however

ίο due to the complicated nature of electrical Contacts were not fully satisfactory. Failure of contact is generally caused by Oxidation, sulfation and wear and tear of the metal surfaces of the contact as well as of a djrch Oxidation. Polymerization and combustion of the sludge itself caused.

There has long been a need for excellent contact greases to eliminate such disturbances, especially in the case of contacts from Niclu-

zo precious metals, such as copper or brass, which are light are prone to contact failure.

The task of the contact grease is therefore to prevent oxidation. Sulfation and Wear of the contact metals and thus in the stabilization of the electrical contact resistance, in the prevention of noises and at the same time in a melting of the contact prevent the electrical contacts from rising in temperature.

The aim of the invention is a compact grease. that the Rise in the electrical contact resistance of an electrical contact is suppressed.

Another object of the invention is a contact grease, which prevents the wear and tear of an electrical contact.

Another object of the invention is a contact grease, which is suitable for use in electrical contacts. those made of copper. Brass, phosphoibronze. Beryllium made of copper or nickel-silver are.

These and other objects of the invention will be apparent from the following description.

A contact grease according to the invention consists of a main amount of paraffinic mineral oil. 10 to 20 percent by weight of a mixture of metal soaps as a thickening agent and 7 to 15 percent by weight of at least one chlorinated aromatic hydrocarbon or a derivative thereof Weight percent barium soap. 25 ^l > is 40 percent by weight lithium soap and 10 to 20 percent by weight aluminum soap. The new contact grease according to the invention prevents the failure of an electrical contact and its failure by welding and at the same time ensures a satisfactory contact effect over a longer period of time, especially when used to electrical contacts made of corrodible metals such as copper, brass, phosphor bronze, beryllium-copper or nickel-silver .

For a Kontaktfeit according to the invention cm chloricfler aromatic hydrocarbon or a derivative of one with a boiling point higher than 300 ° C can be used. Chlorinated aromatic hydrocarbons or derivatives thereof

Irene to prevent temperature rise in an amount less than 10% by weight

jipd the wear and tear of the contact, resulting in a contact grease with poor homogeneity,

Burning of the fat by arcing. If the amount of the mixture of metal soaps

! and at the same time act as a lubricant. less than about 10 weight percent in the fat

% \ n better result can be achieved by giving a value of 5, if the resulting contact grease is too soft,

«Lan at least one of the following connections in order to retain its shape. A lot of the mix

used; Trichlorodiphenyl, tetrachlorodiphenyl, pen- of more than 20 percent by weight ergiU on the

tachlorodiphenyl, hexac'nlordiphenyl, polycblortriphe - on the other hand, a contact grease that is too hard,

uyl, pentachlorodiphenyl oxide, pentachlorophenylben- A contact grease according to the invention can through

loat, hexachlorodiphenylmethane and pentachlorodio addition of an antioxidant and / or rust

phenyl ketone. The best results will be improved in- in- inhibitors. The preferred anti

o according to trichlorodiphenyl, tetrachlorodiphe- oxidizing agents are n-butyl-p-aminophenol, di-sec, -

ayl, hexachlorodiphenyl and polychlorotriphenyl butyl-p-phenylenediamine, ^ '- tetramethyldiamino-

»Elt. diphenylmethane, ix-naphthylamine, η, η'-disalicylidene

When the chlorinated aromatic hydrocarbon 15 is 1,2-propylenediamine, 2,6-di-tert. - butylphenol,

«Which the derivative thereof in an amount of less 2,4 - dimethyl - 6 - tert. - butylphenol, 2,6-di-tert.-

if about 7 percent by weight are present, butyl - ρ - kresoi, 4,4 '- methylene - bis - (2,6-di-tert.-

the tempo, at the rate of increase of the contact, while butylphenol). 2.2'-methylene - bis - (4-methyl-6-tert.-

a lot of meh. than about 15 percent by weight butylphenol), 4,4 '- butylidene - bis - (3-methyI-6-tert.-

the production of a contact grease with good homobutylphenol). The preferred rust inhibitors are

genicity made difficult. Sor'bitan monocleat, a salt of the dinonylnaphthalene

The paraffinic misulfonates and \ - (2-carboxyphenoxy) stearic acid used according to the invention. Mineral oil can be either a pure paraffinic mineral oil. The amount of the antioxidant is preferred as well as an impure paraffinic oil. B. up to 30 percent by weight. 25 indicates 0.01 to 3 percent by weight of the antioxidant aromatic and / or naphthenic mineral oil and about 97 to 99.99 percent by weight of the contains. The paraffinic mineral oil has contact fat. The amount of rust inhibitor is preferably a viscosity of 40 to 180 centistok 0.01 to about 4 weight percent rust inhibitor at 37.8 C and an aniline point above 90 according to about 96 to 99.99 weight percent of Contact ASTM D611-55 & (American Society for Testing 30 fat.
Materials). A mixture of paraffinic mineral oil.

You can use barium soaps, lithium soaps and aluminum, a mixture of metal soaps, including chlorinated aromatic soaps. matic hydrocarbon or its derivative which contain an aliphatic fatty acid residue. Their with or without antioxidant and Rostinhichemischen formulas are represented by Ba (RCOO) ₂ . 35 bitor is heated to 200 ~ 250 ^J C in order to reproduce a homo-Li (RCOO) or Al (RCOO) ₃ , in which gene liquid is produced. \, uu then means an aikyl radical on space-R. These formulas are designed to be temperature cooled. The cooled mixture, however, does not apply the invention to the pure substances by means of any of the usual methods, e.g. B. on a limit, but also contaminated substances three-roller mill, ground and then encompassed, which reduced the unavoidable reduction! Pressure of a removal of air foam contain impurities. For example, this includes subject.

commercially available Al (RCOO) ₃ an amount of The fats obtained are smooth and buttery in terms of their concentration of less than 20 percent by weight of Al (OH) (RCOO) ₂ and are excellent for the production of a contact grease according to Nice mechanical and thermal stability, usable in the invention. The radical R in the above 45 The following examples are intended to illustrate the invention chemical formulas should preferably 12 to. Have 20 carbon atoms. The especially preferred barium. Lithium and aluminum soaps contain the stearic acid residue. B e 1 s ρ ie 1

The content of free fatty acids in these metal 50
soap is preferably low and is preferred

Less than 2 percent by weight. A mixture of 74.7 g of paraffinic mineral oil

In connection with the weight percentage with a viscosity of 60 Centistok at 37.8'C of the mixture of metal soaps, the following and an aniline point of 111.7 ° C. 8 g of barium soap should be indicated: When used, the barium soap increases stearate (melting point 235'C). 5 g of lithium stearate in an amount of more than Λ5 percent by weight (melting point 221 C), 2 g of aluminum clear. Melt electrical contact resistance and deteriorated point 112 ⁰ C), 10g polychlorotriphenyl. OI g 4,4'-Tc with an amount of less than 40 percent by weight trameihyldiaminodiphenylmethane and 0.2 g sorbitan * the resistance of the electrical contact to monoolcat is stirred and heated to 230 to 240 ⁰ C over the welding; clic I ithium soap increased at 60 heated.

Use an amount less than 25 Ge. After homogenization, Jas mixture is added in

weight percent the electrical contact resistance poured a shell, cooled to room temperature

and deteriorated at an amount greater than and milled on a three-roll mill; then

The foam remaining in the fat is less than 40 percent by weight Welding; the Alumir.nirmeife is removed at a 65 reduced pressure. The fat obtained

An amount of more than 20 percent by weight is stable and has a penetration according to

Bold with a low casting point and poor ASTM of 332 and a pouring point of 120'C.

Heat resistance kit. u.id an aluminum soap in the fat is on one made of copper and brass

, esp, tehend.en contact applied, PftS behavior This fat is shown as example 1 in the table,

Example 2

A mixture of 70.5 g of paraffinic mineral oil having a viscosity of about 50 at 37.8 ° C Centistok an aniline point of 102.7 ⁰ C, 10 g Baiium- (melting point 235 ° C), 7 g lithium stearate, 4 g of aluminum stearate, 8 g of polychlorotriphenyl and 0.5 g of 2,6-di- |: ert.-butylphenol are heated to 235 to 245 ° C. After homogenization, the mixture is cooled, ground and treated in a manner similar to that in Example 1. The test results obtained in a manner similar to Example 1 are shown in the table.

Example 3

A mixture of 73.8 g of paraffinic mineral oil having a viscosity of 120 Centistok ^C at 37.8 C and an aniline point of 114,9'C, 6g of barium stearate (melting point: 25O ⁰ CJ, 4 g lithium stearate (melting point 221 C ^2), 2 g of aluminum stearate, 14 g of polychlorotriphenyl and 0.2 g of the sodium fold of dinonylnaphthalene sulfonate are stirred and heated to about 250 ° C. The clear, liquid solution is treated as in Example 1. The test results obtained in a manner similar to that in Example 1 are listed in the table.

and an aniline point of. U4, Q ° C, 9 g barium stearate (melting point 24O ⁰ C), 6 g Uthiumlfuirat (melting point 219 ^p C) _I 2gAIumininmsteamtr, ^{melting point UO 0} C), 12 g polychlorotriphenyl and. 0.1 g of tetrabase is stirred, heated in a beaker and then treated in a manner similar to Example 1. The test results obtained as in Example 1 are given in the table.

Example 7

A mixture of 69.8 g of paraffinic mineral oil with a viscosity of 78.2 centistok at 37.8 ° C and an aniline point of 104.2 ° C, 10 g barium stearate, 6 g lithium stearate, 2 g aluminum stearate, Ug polychlorotriphenyl, 0.2g tetrabase and Ig "Span 80" is stirred, heated in a beaker and then treated as in Example 1. the Experimental results as obtained in Example 1 are shown in the table.

Example 8 Example 4

A mixture of 75.4 g of paraffinic mineral oil having a viscosity of 80 Centistok at 37.8 ° C and an aniline point of 114 C ⁰ O, 7 g of barium stearate, lithium laurate 5 g (melting point 219 ⁰ C), 1.5 g of aluminum , 8 g Hexachlordiphenyl, 0.1 g of tetra base and 3 g of sorbitan monooleate is heated in a beaker until its temperature reaches about 24O ⁰ C The resulting mixture is further treated as in example. 1 The test results obtained as in Example 1 are given in the table.

Example 5

A mixture of 72.9 g of paraffinic mineral oil with a viscosity of 60 centistok at 37.8 ° C. and an aniline point of 111.7 ° C., 10 g of barium stearate, 5 g of lithium laurate (melting point 219 ° C.), 3 g of aluminum stearate and 9.1 g of tetrachlorodiphenyl is stirred n- ' ^: ' Π 'rglas heated until ν.-κη-

Tempi Tüii 'nht hat. The received -ή-

Genii'ih 'manner as in Example ¹ II

beh.in.I,! he as in the example i

diirchjiL-ful. | m of the table > n

goes ti.

A mixture of 73.7 g of paraffinic mineral oil with a viscosity of 80 Centistok at 37.8 ^C C and an aniline point of 114.0 ° C, 8 g of barium stearate, 6 g of lithium stearate, 2.2 g of aluminum stearate, 10 g of polychlorotriphenyl and 0 , 1 g of tetrabase is stirred, heated in a beaker and treated in a manner similar to that in Example 1. The test results obtained as in Example 1 are given in the table.

B e i s ρ i e 1 9

A mixture of 76.5 g of paraffinic mineral oil having a viscosity of 120 Centistok at 37.8 ° C and an aniline point of 114.9 ^C C, 8 g of barium stearate, lithium stearate 4 g, 1.5 g of aluminum stearate. 9 g of hexachlorodiphenyl and 1.0 g of 2,2'-methylenebis (4-methyl-6-tert-butylphenol) are stirred, heated in a beaker and treated in a manner similar to that in Example 1. The test results obtained in a manner similar to Example 1 are shown in the table.

Example 10

fm (icr

with L-i nei

Iraffinian miner> ί.Ί "Centistok at 37> (A mixture of 73.8 g of paraffinic mineral oil with a viscosity of 60 Centistok at 3 ".X t and an aniline point of 117.2 C, 7 g of barium stearate. 6 g I it hum stearate. 2 g of aluminum stear. 11 g polychlorotriphenyl and 0.2 g Tetrahase winl stirred, heated in a beaker and treated in a similar manner as in Example 1. As in travel

^ 5 test results obtained from game I are in det Table given.

Tetr.ibase mentioned in the above examples is 4.4'-tetramethvldiaminoilinlifinvlmpih; in

Tabel

Example Νή 3 I 4

Combination of contact jams

Contact pressure (g)

Opening speed

(cm · sec "M

Opening force (g)

Contact voltage (V) ..

Contact current (A)

copper copper Copper j copper copper copper Brass Brass Brass 1 phosphorus Nickel- Brass I bronze silver 200 200 200 ' 200 200 300 30th 30th 30:30 30th 20th 100 100 100 '100 100 100 Change Change Change ι change Change Change current current current I current current current 100 100 100, 100 100 100 sharpen sharpen Lamps- j lamps sharpen sharpen load: load: burden burden load: load: 30th 30th 30th 30th normal: 4 normal: 4 normal: 4 normal: 4 normal: 4 normal: 4

Number of operations

Contact resistance (mQ)

0

10,000

30,000

50,000

Number of switches on and off before welding

18 39 28

24 55 79

34
49
81

4 25 32 44

29

85

162

10 42 78

> 50 000> 50 000> 50 000> 50 000 table (continued)

35,000> 50

Example no.

9 I 10

j commercially available! Commercial contact grease A, contact grease B

Combination of

Contact metals

Contact pressure (g)

Opening speed

(cm ■ see " ¹ )

Opening force (g)

Contact voltage (V) ...

Contact current (A)

Contact resistance (m) 0

10,000

30,000

50,000

Number of operations before welding

Copper i copper beryllium | Beryllium copper i copper 300!

20th

100

Alternating current

100

Lamp load

normal:

4 18 15

22nd

> 50

20th

100

Alternating current

100

Lamp load

normal:

copper
Brass

200

30th
100

Alternating current

100

Peak load:

30th
normal: 4

! Copper beryllium copper 200

30 100

Alternating current

100

Peak load:

30 normal:

Copper brass

200

Copper brass

200

30!

100; Change-change

current

100

Peak load:

30 normal:

Number of operations

29 48 75

> 50

22nd
39
69

> 50,000

15 48 S3

> 50

255 1250 2

3

current

100

Peak load:

30 normal:

325 1580 1420

Claims (5)

Claims; 1. Electrical contact grease, consisting of 1. a major amount of paraffinic mineral oil; 2. 10 to 20 percent by weight of a mixture of metallic soaps as a thickening agent, wherein the mixture of metal soaps is essentially made up a) 40 to 65 percent by weight barium soap, b) 25 to 40 percent by weight lithium soap and c) 10 to 20 weight percent aluminum soap composed 3. 7 to 15 percent by weight of at least one chlorinated aromatic hydrocarbon or a derivative of a chlorinated aromatic Hydrocarbon, optionally 4. 0.01 to 3.0 weight percent antioxidant and optionally 5. 0.01 to 4.0 percent by weight anti-rust agent.