DE1288220B - Thread lubricant - Google Patents

Description

The use of the individual compounds as lubricant additives is already known. From the US Pat. No. 2,736,700 is also the combination of such compounds as dry lubricants, however, not known in a mixture with a mineral oil.

It has now been found that a lubricant paste consisting of a mineral oil, MoS ₂ , graphite, boron nitride, talc or copper powder and optionally a solvent, characterized in that it also contains cadmium oxide, lead oxide, lead sulfide, indium oxide, zinc oxide, strontium oxide, copper oxide , Silver sulphate or sodium sulphate, has excellent properties as a lubricant to prevent gear and wear. . is

On the one hand, molybdenum disulfide, boron nitride, talc, copper powder or, preferably, graphite are used. The graphite can be natural graphite or electrographite, which preferably has a surface of. 1 to 500 m ² , in particular 10 to 150 m \ per ao gram.

On the other hand, preference is given to cadmium oxide or lead oxide, lead sulfide, indium oxide, zinc oxide, Strontium oxide, copper (I) oxide, silver sulfate or sodium sulfate are used. These substances should preferably have a small particle size, with an average particle size of not more than 10μ is preferred. In the case of cadmium; Oxyd, for example, is a material with an average Particle size of 0.5 to 2 microns particularly useful.

- As,. Mineral oil becomes a hydrocarbon oil with a high boiling point, e.g. B. also a wax is used, whereby the paste remains plastic after it is exposed to the atmosphere --- '■'. Optionally, low-boiling solvents such. B. mineral spirits, solvent naphtha, toluene and xylene are added.

The paste according to the invention can also contain other conventional lubricating oil additives, e.g. B. a dispersant, Contain fillers and / or thickeners, extreme pressure lubricants.

E.g. for example 1 thread lubricant

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100 g graphite (surface = 100 m ² / g), 71 g cadmium oxide (particle size between- 0 ^ 5 and "-2.0 μ -'- 5ο ^: diameter), 10.4 g amorphous silica (surface = about 175 m ² / g), 3.4 g of a material consisting of 50 to 54 percent by weight of the sodium salt ypn_ petroleum sulfonate with a molecular weight of 450.5 percent by weight "water, .0.5 percent by weight. 55: inorganic solids, the remainder mineral oils and 35 g lead powder (particle size 0, 05 mm) were placed in a mixer and 88 g of hydrocarbon oil (solvent neutral oil 500) were added together with enough mineral spirits to produce a suitable paste. Then it is masticated for 4 hours. Then it is diluted with so much mineral spirits in the mixer that a product of suitable consistency for mixing in a high-speed mixer results. Then the material is transferred to a high-speed mixer and beaten for 2 hours. In the mixer, the mixture is then diluted to 50% solids with mineral spirits.

Example 2

"Anti-abrasion lubricant
(High pressure lubricant)

The formulation of this composition is exactly as in Example 1, but with the addition of 22 g of chlorinated Wax. There is so much mineral spirits used in the final dilution in the mixer that a results in a suitable consistency for brushing on, and after whipping in the mixer, white spirit is used again added to give a composition of suitable consistency.

Example 3

A composition is put together according to the same recipe as in Example 1, with the Exception that cadmium oxide is omitted and 97 g of lead oxide (PbO) with a particle size between 0.5 and 2.0 μ diameter can be introduced in its place.

Example 4

A composition is based on the same Recipe as compiled in Example 1, with the exception that cadmium oxide is omitted and 28 g of sodium sulphate of a particle size between 0.5 and 2.0 μm diameter knife were introduced in its place will.

Eg game 5

A composition is put together according to the recipe of "Example 1, with the exception that cadmium oxide is omitted and 20 g of lead sulfide with a particle size ^: between 0.5 and 2.0 μ diameter are introduced in its place.

Example 7

A composition is put together according to the recipe of Example 1, with the exception that graphite is omitted and 20 g of particulate molybdenum disulfide having a surface area of 10 to _: 30 m ² / g is introduced in its place.

Test report

. The surprising technical progress can be seen from the following comparative examples.
"■ - The following lubricant pastes were produced as follows:

* "■ Composition 1
a) Based solely on graphite

lOOj electrographite (surface .. IiL up to. 20 m ² / g), iÖO g hydrocarbon oil (500 solvent neutral oil), 50 g .-. grease oil, consisting of 10% finely divided silicon dioxide in a hydrocarbon oil (150 solvent neutral oil) ..

The ingredients are placed in a blender and mixed intimately for 30 minutes.

b) Based on graphite and cadmium oxide

68 g electrographite (surface 10 to 20 m ² / g), 119 g cadmium oxide (particle diameter between 0.5 and 2.0 μ),

110 g hydrocarbon oil (500 solvent neutral oil), 50 g grease base, consisting of 10% ^Ie i & - distributed silicon dioxide in a hydrocarbon oil (150 solvent neutral oil).

The ingredients are placed in a blender and mixed intimately for 30 minutes.

Composition; 2. . .
a) Based solely on graphite '

100 g electrographite (surface 10 to 20 m ² / g), 150 g white spirit.

The graphite was fed into a mixer and sufficient to form a stiff paste Amount of white spirit added. After stirring for 15 minutes, the remaining white spirit was added.

b) Based on graphite and cadmium oxide

68 g of electrographite (surface 10 to 20m ² / g), 119 g of cadmium oxide (particle diameter between

0.5 and 2.0 μ),
200 g white spirit.

The graphite and cadmium oxide were fed into ao mixer and one to form a Sufficient amount of white spirit is added to the stiff paste. After stirring for 15 minutes, the remaining White spirit added.

c) Based solely on cadmium oxide

119 g cadmium oxide (particle diameter between

0.5 and 2.0 μ),
200 g white spirit.

The production takes place as in composition 2, b) described.

Composition 3
a) Based solely on graphite

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120 g electrographite (surface 100 m ² / g),
10.4 g of amorphous silicon dioxide (surface area approximately 175 m ^a / g),

3.4 g of mixture A (a material of 50 to 54 percent by weight of the sodium salt of petroleum sulfonate with a molecular weight of 450.5 percent by weight water, 0.5 percent by weight inorganic solids, the remainder mineral oil). The foregoing materials were placed in a blender and 40 weight percent pure paraffin oil was added along with an amount sufficient to form a stiff blend paste. After 4 hours mixing white spirit was sufficiently added to ₀ to obtain a solids content of 50 ° / in the final product.

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b) Based on graphite and cadmium oxide

100 g electrographite (surface 100 m ^a / g),
71 g cadmium oxide (particle diameter between 0.5 and 2.0 μ),

10.4 g of amorphous silicon dioxide (surface area approximately 175 m ² / g), 3.4 g of mixture A.

The foregoing materials were placed in a blender, and 40 percent by weight Pure paraffin oil was added in an amount sufficient to form a stiff blend paste White spirit added. After mixing for 4 hours, sufficient white spirit was added to produce a To obtain final solids content of 50%.

c) Based solely on graphite

120 g of electrographite (surface area; 10 to 20 m ² / g), 10.4 g of amorphous silicon dioxide (surface area, approximately 175 m ² / g), ".- · _.-;
3.4 g mixture A.

The production takes place as in composition 3, a) described.

d) Based on graphite and cadmium oxide

100 g electrographite (surface 10 to 20m ² / g), 71 g cadmium oxide (particle diameter between 0.5 and 2.0 μ),

10.4 g of amorphous silicon dioxide (surface area approximately 175 m ² / g),
3.4 g mixture A.

The production takes place as in composition 3, b) described.

Investigation procedure

12.7 x 50.8 mm long "R" quality Whitworth and BSF hexagon head bolts and hexagon screws are used for the tests at 400 ^° C. Studies at 550 ⁰ C (W hitworth) are carried out using materials of similar dimensions from a proprietary steel alloy. The bolts are inserted through holes in a 12.7 mm thick steel plate and the lubricant to be tested is smeared onto the exposed threads. Washers are treated with lubricant on both sides and placed over the bolts. The screws are screwed in by hand and finally tightened to 50ft / lbs (33.6 m / kg) with a torque wrench, leaving at least two complete threads exposed above the bolt. The examinations are carried out for 100 hours at elevated temperatures with free excess oxygen. The torque required for the solution is measured after the structure has cooled to room temperature. Tests are carried out at least twice, the results given below being mean values.

Results (the figures given show mean values of the loosening torque):

1. Whitworth 400 ⁰ C:

Composition 1, a) 31.6 m / kg

Composition 1, b) 28.5 m / kg

Composition 2, a) 30.2 m / kg

Composition 2, b) 27.5 m / kg

Composition 2, c) 42.0 m / kg

2. BSF 400 ° C:

Composition 1, a) 40.3 m / kg

Composition 1, b) 38.6 m / kg

3. Whitworth 55O ⁰ C:

Composition 3, a) 42.0 m / kg

Composition 3, b) 40.3 m / kg

Composition 3, c) 40.3 m / kg

Composition 3, d) 33.6 m / kg

Claims (1)

5 6 Claim:: medium, thereby geke; nnzeichn ^ t that they additionally-still caduum oxide, lead oxide ^ Lubricant paste, consisting of a lead sulfide, indium oxide, zinc oxide, strontium oxide, red and MoS ₂ , graphite, boron nitride, talc or copper oxide, silver sulfate or sodium sulfate Copper powder and optionally a solution 15 holds.