DD301520A7 - SOFT LUBRICANT WITH FREEZER PROTECTION - Google Patents

Abstract

The invention relates to a Weichenschmierfett with antifreeze effect, the up to at least 15 degrees C without dilution, z. B. with glycols, is applicable. The invention is based on a for a long time, d. H. at least 1 year, storage-stable combination of substances known per se, which makes it possible to use 1,3-butylene glycol in this fat as a thawing component in a concentration up to 65 wt .-%. Compared with other glycol-containing fats, the product has a significantly improved antifreeze effect, is very creep-capable, allows for economical consumption and has a lower environmental impact. It is particularly suitable for the lubrication of turnouts without point heaters, but it can also be used without restriction on turnouts equipped with the usual point heaters. {Consistent grease; Fluid grease; Winter fat; Glycol base; Consistency stability; Shelf life; Railway points; Antifreeze; creep}

Description

Field of application of the invention

The invention relates to a Weichenschmierfett with thawing effect, which can be used in extreme cases to -25 ° C without dilution. It can be used for the lubrication of all types of turnouts, moving parts of external safety equipment and track locks.

Characteristic of the known state of the art

For the lubrication of the points currently lubricating oils or greases are used internationally. Greases with glycol contents above 40% have been described in PS-DD 144069, PS-DD 144071 and PS-DD 200743. While according to PS-DO 144071 only fats of the consistency classes can be made greater than 1, which are not suitable for the point lubrication in winter, in the DR a grease according to PS-DD 144069 is used despite obvious deficiencies. The main deficiency of the fat produced according to PS-DD 144069 is that it separates into a thickener-oil mixture and glycol within different time periods, which can be between 24 hours and several days, which can vary significantly in terms of batches. The thickener-oil mixture floats due to its lower density on dom heavy glycol. All previous attempts to produce a consistently uniform product according to the recipe of the PS-DD 144069, did not lead to success. Also with the testv. iron Application of patent PS-DD 225434 "Process for the preparation of consistent lubricants", which has already pointed out the disadvantages of the high glycogen turnout smelting agent, and in which a process for remedying this deficiency has been described, was only slightly improved Only structurally stable, free-flowing, glycol-containing lubricating greases can be produced if, as glycol, octanediol or a glycol mixture with an octanediol content of more than 80% is used, but in many cases separation occurs after different storage times 1,3-butylene glycol, which has a high thawing effect, can not be used for winter grease according to the listed horsepower, due to the fact the thorough stirring of the winter grease is also described in the leaflet "Lubrication of switches with summer and winter grease" the request, endung demanded. However, since the separation can also be made shortly after production, there is a possibility that the thickener soap layer described is very firm due to the long storage times and stirring in the large containers is hardly feasible, which in turn leads to application errors. Overall, the "separation effect" is a major reason why the use of winter grease according to PS-DD 144 069 despite the positive overall characteristics, such as longer lubrication periods compared to oil and thawing effect, prevailed only imperfectly, in addition, this property of winter fat made impossible for For this reason, in practice, the winter grease was disproportionately diluted with petroleum or glycol even at temperatures below -5 ° C for better processability , so that the Schmiei time shortened again and the benefits came overall little effect.

Object of the invention

The aim of the invention is to change by suitable composition, the winter fat so that the benefits of a Weichenschmierfettcs with thawing effect can come to full advantage and disturbances are avoided by application errors. The hitherto necessary effort of stirring should be eliminated and the amount of effort must be reduced. Here, the previous lubrication period of 2 days are not to fall below.

Explanation of the essence of the invention

The invention has for its object to develop a Weichenschmierfett for winter use, in which the lack of Winterfottes PS-DD 144069 are eliminated. That is, by changing the recipe, the structural stability is to improve so that a long storage time (at least 1 year) is achieved without separation phenomenon. Furthermore, it should be possible, while maintaining a fat structure such a soft, flowable consistency set, which allows to use at least -15 ⁰ C, the switch grease without dilution with oil or de-icer for lubrication of all lubrication points of the points. In addition, the thawing effect and environmental protection are to be improved by the use of biodegradable suitable glycols. As far as possible, pure products should be used in order to guarantee a more uniform end product based on defined starting materials. According to the invention the object is achieved in that a combination of sodium soap of trailing fatty acids of chain length C ₂₂ to C ₂₈ in a concentration of 1.0 to 2.5Ma .-%, 1,3-butylene glycol in a concentration of 50 to 65Ma.- %, Mineral oil of viscosity at 50 ° C of 45 to 55mmVs in a concentration of 25 to 40% by mass, triethanolamine in a concentration of 3.0 to 4.0Ma .-%, a 50% oily solution of Zinkdialkyldithiophosphat in a concentration of 1.5 to 2.0Ma .-%, the reaction product of a mixture of alkylarylsulfonic acids and alkylphenols with alkaline earth salts (corresponding to PS-DD 71 765 and PS-DD 126115), which has a sulfate ash content of 24 to 27Ma .-% and a total base number (TBN) of at least 100 mg KOH / g, in a concentration of 3.0 to 5.0 Ma .-%, optionally free trailing fatty acid of chain length C ₂₂ to C ₂₈ to a maximum of 1.0 Ma .-% and optionally Water to a maximum of 10.0Ma .-%, all based on the finished product was found.

With this combination, it has been possible for the first time to offer a switch lubricating grease for the winter, which contains 1,3-butylene glycol as the sole glycol and despite its very soft, flowable consistency, has a stable structure that enables a shelf life of at least 1.5 years. The oil separation otherwise observed with fats of this consistency class (000) does not occur. Despite the greater water solubility of 1,3-butylene glycol compared to octanediol or mixtures with octanediol, the lubrication periods at comparable environmental influences (rain or snow) are not shorter, but on average one day longer, which is certainly due to the favorable structure of the combination found is.

embodiments

The invention will be explained in more detail below on some embodiments.

example 1

A switch lubricating grease with antifreeze effect of the following composition was prepared:

Ma .-%, based on the component finished product

PC acid VZ (chain length C ₂₂ -C ₂₈ ) 1.00

NaOH ₁₀ OS ₀ 0.05

1,3-Butylene glycol of the Chemical Works Buna 50,00

Lubricating oil R 50 of the hydrogenation plant Zeitz 35,95

Calcium stearate 0.50

Triethanolamine 3.00

50% oily solution of Zinkdialkyldithiophosphat the hydrogenation Zeitz 1.50 Peaktionsprodukt a mixture of Alkylarylsulfonsäuren with

Alkylphenols with Erdaikalisalzen the hydrogenation Zeitz 3.00

Water 5,00

This product had the properties described above and was long term without consistency change.

Example 2

A switch lubricating grease with antifreeze effect of the following composition was prepared:

Component Ma .-%, based on the finished product

FC acid VZ (chain length C ₂₂ -C ₂₈ ) NaOH ₁₀₀ W ₀ 1,3-butylene glycol of the chemical plants Buna lubricating oil R 50 of the hydrogenation plant Zeitz calcium stearate triethanolamine 50% oily solution of zinc dialkyldithiophosphate of the hydrogenation plant Zeitz reaction product of a mixture of alkylarylsulfonic acids and alkylphenols with alkaline earth salts of the hydrogenation Zeitz water

Also this product brought the described advantages.

2.00 0.15

60.00 24.85 1.00 4.00

2.00

5,, 0 2,00

Example 3

A switch lubricating grease with antifreeze effect of the following composition was prepared:

Component Ma .-%, based on the finished product

PC acid VZ (chain length C ₂₂ -C ₂₈ ) 1.51

NaOH ₁₀₀ Si ₈ 0.09

1,3-Butylene glycol of the Chemical plants Buna 55,06

Lubricating oil R 50 of the hydrogenation plant Zeitz 32,32

Calcium stearate 1.00

Triethanolamine 4.00

50% oily solution of zinc dialkyl di-iodophosphate

of the hydrogenation plant Zeitz 2.00

Reaction product of a mixture of Alkyiarylsulfonsäuren

and alkylphenols with alkaline earth salts of the hydrogenation Zeitz 4.00

Water 0.02

This product also brought the described test results.

In summary, the advantages of the winter fat according to the invention over the previous winter fat are shown in the following table.

Table:

Comparison of the winter fat according to the invention for switches with a winter grease according to the prior art

criteria

Winter fat according to the invention Winter fat according to the state of the art

structure

Structural stability (storage stability)

Thawing action creep

Effort when applying

Lubricant use per regreasing average lubrication intervals

uniform structure

at least 1.5 years without consistency change or separation into the constituents, storable

to -15 ⁰ C detected bismind. -15 ° Csehrgut

Even without much effort than the summer fat, bismind. -15 ° C without dilution applicable

3CMOg 3-4 days partly uniform, partly "goose-lard-like" Separation into solid and liquid components in different times, but no more than 2 months without separation 3d, storable to -8 ⁰ C

due to structural instability limited creep after stirring with over summer fat increased effort applicable, dilution mind, from -10 ° C, usually iodine even at higher temperatures necessary

60-8Og 2 days

Claims (3)

1. Weichenschmierfett with antifreeze effect, characterized in that it is a combination of sodium soap of trailing fatty acids of chain length C ₂₂ to C ₂₈ in a concentration of 1.0 to 2.5 wt .-%, 1,3-butylene glycol in a concentration of 50 to 65 wt .-%, mineral oil of viscosity at 50 ⁰ C of 45 to 55mm ² / s at a concentration of 25 to 40 wt .-%, calcium at a concentration of 0.5 to 1.0mA .-% triethanolamine in a concentration of 3.0 to 4.0% by mass, a 50% oily solution of zinc dialkyldithiophosphate in a concentration of 1.5 to 2.0% by mass, the reaction product of a mixture of alkylarylsulfonic acids and alkylphenols with alkaline earth salts, has a sulfate ash content of 24 to 27% by mass and a total base number (TBN) of at least 100 mg KOH / g, in a concentration of 3.0 to 5.0% by mass, optionally free chain-chain fatty acid of chain length C ₂₂ to C ₂₈ to max. 1.0Ma .-% and optionally water to max. 10.0Ma .-%, all based on the finished product represents. / 2. Weichenschmierfett with antifreeze effect according to claim 1, characterized in that the ratio of thickener and reaction product of a mixture of alkylarylsulfonic and alkylphenols with alkaline earth salts, a sulfate ash content of 24 to 27 wt .-% and a total base number (TBN) of at least 100mg KOH / g, preferably 1: 2 to 1: 2.5. 3. Weichenschmierfett with antifreeze effect according to claim 1, characterized in that the 1,3-butylene glycol and the reaction product of a mixture of alkylarylsulfonic acids and alkylphenols with alkaline earth salts, a sulfate ash content of 24 to 27 wt .-% and a total base number (TBN) of at least 100 mg KOH / g, are added in the cooling phase.