DE1284012B - Lubricating grease mixtures - Google Patents

Description

It is known to treat lubricating oils with clays, e.g. B. with up to 0.6 equivalents of the fatty acids mentioned (georganophilic To compact clays. Such lubricating. saturated and unsaturated) and a mixture of But fats have, if you give them extreme pressure additives "1 equivalent of polyethylene polyamines, with 20 to admixed, the disadvantage, that sometimes an unwanted 80 percent by weight of the mixture polyamines Softening of the grease occurs. Next take 5 that contain 2 to 3 nitrogen atoms while is also the addition of alkaline earth carbonates to the remaining fraction of polyethylene polyamine with a Known lubricating oils. The addition of alkaline earth average molecular weight in the range from 200 to carbonates to 500 compacted with organophilic clays.

Lubricating oils, on the other hand, are not known. Other suitable amino amides are amino amides

It has now been found that lubricating greases which have been gelled with polyaminooxy compounds having an average of oleophilic clays with regard to at least 3 amino nitrogen atoms and oxy groups. their high pressure properties or resilience _; The preferred starting materials for the preparation have sol-synergistic effectiveness if one is more likely to use polyaminooxy compounds, epichlorohydrin, alkaline earth metal carbonates and optionally MoS ₂ , and ammonia.

amorphous antimony sulfide and / or lead naphthenate 15 which are used for the production of aminoamides. . The fatty acids have 10 to 22 carbon atoms.

If the alkaline earth carbonate is the only high pressure additive, if at least 50% of the acids are unsaturated, those with 17 to 19 carbon atoms are added in amounts of 3 to 7.5 percent by weight. When used in conjunction. However, if the saturated acids form with the MoS ₂ or Sb ₂ S ₃ , the amount of ao predominate, the acids should be 10 to 16 carbon carbonate 0.03 to 1.5 percent by weight. own atoms. You can also use a mixture of

Calcium and Magne fatty acids are used as alkaline earth carbonates.

shim or barium carbonate, preferably in pure form. Other acids are oleic acid and tall oil acids

Condition, used. However, lime is preferred. Capron, undecyl, lauryl, myristic and palmitin AIs SB ₂ S ₃ is an amorphous antimony sulfide too acidic. The aminoamides are made by heating the turn. A crystalline antimony sulfide, however, fatty acids and polyamines at 125 ⁰ C and 250 ° C would be produced in a chafing to the 0.5 and 16 hours at the application.
Cause metal parts. The amorphous antimony As lubricating oils are refined, unrefined or

sulfides (e.g. antimony trisulfide, antimony tetrasulfide or semi-refined, paraffinic, naphthenic or Antimony pentasulphide and mixtures of these) vary from 30 asphaltic mineral oils with a viscosity of 50 in color from yellow to gray. They are obtained e.g. up to 4000 SUS at 38 ° C or synthetic lubricants used by precipitating the antimony sulfide from an oil.

aqueous solution of a water-soluble antimony salt, other common lubricating additives, e.g. B. aromatic

such as antimonyl chloride, by treatment with an amine, alkali nitrites, as well as the reaction products Sulfide, such as sodium sulfide or hydrogen sulfide. 35 terpenes with a phosphorus halide

The lead naphthenate fulfills the function that it can also be added.
High pressure properties of the lubricating greases, which are The lubricating greases are according to known methods

dry conditions can be achieved even under produced by mixing.

maintains wet conditions and sometimes preferred lubricating greases are those which have a

even unexpectedly higher high pressure 40 predominant share of mineral lubricating oil, properties. The amount of lead naph- 2.5 to 10 weight percent clay, 0.25 to 1% earth thenate should be 0.1 and 0.75%, calculated on the weight of alkali carbonate, 0.0 to 1.25, preferably 0.25 to 1.0, of the grease. Weight percent sulfide, 0.0 to 0.65 weight percent

As a starting stone for the production of oleo- lead naphthenate and 2.5 to 5 percent by weight of a The philic clays are montmorillonites, containing sodium, 45 hydrophobic amino compounds, the Potassium, lithium and the other bentonites, specifically expressed weight of clay and amino compound of the Wyoming Bentonite type. Is preferred as separate components, regardless of the magnesium bentonites (hectorites). whether they are physical mixtures of the two substances

These clays are modified by absorption or exist as amino clays. Optimal mixes one or more olefinic, cationic, upper 50 are those containing 3 to 7% hectorite clay, 0.3 to 0.7% surface-active agents such as aliphatic amines, imide calcium carbonate, 0.5 to 0.85% amorphous antimonazoline and aminoamides. The clays are trisulfide or molybdenum disulfide in amounts, 0.35 to 0.66% lead of 2.5 to 10 percent by weight of the lubricating oils for petroleum naphthenate and 2 to 4.5 percent by weight mixed. contain the aminoamines that are made from

The term "oleophilic clay" includes clays if 55 0.3 to 0.6 equivalents of C _10-22 FeWSaUrCn per equivalent (absorbed or linked to by reaction) valent of the mixture of polyethylene polyamines, such as a sufficient amount of an ammonia base. described above,
to form an oleophilic product. The so- example

called »onium clays« contain reaction problems

products made from oleophilic ammonium bases and sound. play mineral oils used. The entire lubrication

As aliphatic amines and imidazolines, bold contains hectorite clay, which was made waterproof those with at least 18 carbon atoms compared with 60%, calculated on the weight of the clay turns. However, aminoamides, which are an aminoamide formed from tall oil fat, are preferred aliphatic monocarboxylic acids with 10 to 65 acids and a mixture of polyethylene polyamines, Carbon atoms and polyalkylenepolyamines as described above as a bottom product, forms are. Even cheaper aminoamines are obtained in the production of ethylenediamine those that had been formed by the conversion of 0.3.

The Timken high pressure test is described in ASTM Bulletin, 228, February 1958, pp. 28-31.

The amorphous antimony trisulfide used in these experiments was produced by precipitation, by adding hydrogen sulfide to an aqueous solution of antimony trichloride. The so produced Sulphides were brick red and had before melting compared to crystalline antimony sulphides a relatively low specific weight. The modified greases were made by preforming the greases according to the direct transfer process described with the subsequent one Addition of the antimony trisulfide and / or the lead naphthenate in the form of an oil sludge.

Table I.

another common thickener combined in place of organophilic clays.

Lubricant
fat Sb ₂ S ₃ CaCO ₃ Molybdenum-
disulfide Timken
Slide ■ test, kg
Wolf down A. 0.6 9.1 B. - 4.6 - 15.9 18.1 C. - 6.6 - 20.4 22.7 D. 0.75 - - 13.6 15.9 E. 0.3 0.6 - 13.6 15.9 F. 0.5 0.6 - 18.1 20.4 G 0.75 0.6 - 22.7 24.8 H 0.25 1.6 - 15.9 18.1 I. 0.5 1.2 - 24.8 - J - - 5.0 15.9 18.1 K - - 7.0 15.9 18.1 L. - 1.0 1.0 18.1 20.4

Like the following comparative tests with a soap grease (about 8 percent by weight lithium hydroxystearate) show, there is a corresponding favorable effect with regard to the load capacity in the Timken test not one if you are using the alkaline earth carbonates

S. Lithium soap
Grease Table II ASTM
Penetration,
unprocessed /
60 strokes Timken test,
kg
Wolf down IO
a
b
C. CaCO ₃
Weight
percent 255/254
269/266 9.1
9.1
13.6 *) 12th
6th
10

*) Not tested at 9.1 kg.

Example 2

Lubricating greases were prepared by grinding a hydrophobic, oleophilic ammonium clay and a lubricating oil with a viscosity of 55 seconds. SSU at 99 ⁰ C for the purpose of producing a lubricating grease with an ammonium clay content of 6.18%. This grease failed the Timken test at 9.1 kg pressure. It also failed the Timken test at 9.1 kg pressure in the presence of antimony trisulfide. Modifying the latter with 0.4% calcium carbonate increased the Timken number to 13.6 kg, while increasing the calcium carbonate to 1% increased the Timken number to 22.7 kg.

Claims (1)

Claim: Lubricating grease consisting of a lubricating oil, an oleophilic clay, an alkaline earth carbonate and optionally MoS ₂ , amorphous atimon sulfide and / or lead naphthenate.