EP3620502A1 - Composition for preparing a lubricating composition - Google Patents

Abstract

Lubricant composition, in particular a cooling lubricant solution, based on ionic and / or organic compounds.

Description

The invention relates to a composition for the production of a lubricant composition, the use of this composition as a performance additive in lubricant compositions, preferably in cooling lubricant compositions, in particular in cooling lubricant solutions, a lubricant composition and methods for producing the same.

Cooling lubricants are often used when processing metal. The term "cooling lubricant" according to DIN 51385 designates a metalworking medium which is used in particular to support metalworking or forming processes or to influence the microstructure (cf. also AR Eyres, RN Mather, J. Inst. Petr. 59 (565), pp. 9-17, 1973 ). Cooling lubricants can be divided into the main groups of non-water-miscible and water-miscible cooling lubricants, with the water-miscible further differentiating between emulsifiable and water-soluble cooling lubricants.

Cooling lubricants can make a significant contribution to the economy of metalworking processes. For example, their use can significantly influence the service life of the machining tools used and / or the quality of the workpiece.

In the contact zone between the chip and the tool, a cooling lubricant should have a cooling and friction-reducing effect if possible. If the cooling effect is in the foreground, water-miscible cooling lubricants are mainly used for this. Have this however often poorer lubricating performance and resistance to microorganisms compared to non-water-miscible cooling lubricants.

If, on the other hand, a high lubricating capacity is desired, non-water-miscible, namely oil-based cooling lubricants are used. These are characterized above all by their good friction-reducing properties. A disadvantage of the non-water-miscible cooling lubricants is that their cooling effect is low compared to water-miscible cooling lubricants due to the low specific heat capacity and thermal conductivity. In addition, the components are more difficult to clean after processing than when using water-miscible cooling lubricants. Another problem is the oil mist, which can occur when using the oils, especially at high cutting speeds. The aerosols it contains lead to health-endangering lung loads. The oil mist may also be easily flammable, so that adequate safety precautions must be taken.

Cooling lubricants can also be emulsions that combine the beneficial properties of the cooling effect and the reduction in friction ( W. Baumann, B. Herberg-Liedtke, Chemicals in Metal Working, Berlin; Heidelberg Springer, 1995, pp. 37f ). An emulsion is a disperse system that is created by mixing two liquids that are not soluble in one another. They show a relatively good lubrication performance and an acceptable cooling effect.

For example, the European Offenlegungsschrift discloses EP 1 319 703 A1 water-based coolant emulsions for metal forming. After drying, these form a lubricating film on the workpiece. In addition to water-soluble inorganic salts, the emulsions also contain emulsified paraffin wax to reduce friction.

Critical to cooling lubricant emulsions are - in addition to the high manufacturing costs - above all the instability of the emulsion, particularly with respect to foreign oil input, salt load and water hardness, and the colonization of the emulsion with microorganisms. The attack on fungi and bacteria reduces the corrosion protection behavior of the emulsions and leads to health problems for the personnel. In addition, the emulsion loses stability due to the attack by microorganisms, which can cause malfunctions. Emulsions also tend to foam. It is therefore typical for lubricant emulsions that they contain a large number of auxiliaries, such as, for example, biocides, emulsifiers or defoamers. In addition to the oil phase present in emulsions, these auxiliaries represent a challenge when it comes to maintaining the emulsion, occupational safety and cleaning the components.

The addition of such auxiliary substances not only increases the effort and costs for the production of the lubricants, but also worsens their CO ₂ balance. In addition, the auxiliaries represent an additional health burden for the user and the environment, since these substances are mostly compounds, in particular organic compounds with a relatively low molecular weight, which are preferably at elevated temperatures - as is customary in metal-cutting or forming processes - go into the gas phase and thus potentially pose a health and environmental risk.

The object of the invention is accordingly to provide a composition for producing a lubricant composition and a lubricant composition which reduces or overcomes at least one of the disadvantages mentioned.

This object is achieved by the subject matter of claim 1 and claim 2. Advantageous further developments are the subject of corresponding subclaims and subordinate claims.

According to the invention, the object is achieved by a composition for producing a lubricant composition comprising a component (A) or a component (B), or mixtures thereof. Component (A) consists of one or more inorganic salts, while component (B) consists of one or more compounds each containing at least one structural unit XC. C is carbon and X is silicon (Si), nitrogen (N), phosphorus (P) or sulfur (S). In the structural unit, X and C are linked to one another by means of a σ bond, π bond or ionic bond. The composition is further characterized in that a homogeneous solution is formed when water is added at room temperature.

The composition can also be obtained by bringing together at least two salts of component (A), at least two compounds of component (B) or mixtures of at least one salt of component (A) and a compound from component (B). Unless explicitly stated otherwise, all further preferred embodiments therefore relate to these two versions of the composition according to the invention.

The inventors have now found that the composition according to the invention is suitable for providing lubricant compositions which have a high lubricating performance and also a good cooling performance. The performance of this lubricant composition is comparable to, or even better than, known coolant emulsions. This was demonstrated, for example, when it was used in metal cutting or when metal, in particular steel and aluminum, was formed (see Example 3).

These observations were surprising, because experts believed that the lubricity of cooling lubricant solutions is lower than that of cooling lubricant emulsions ( W. Baumann, B. Herberg-Liedtke, Chemicals in Metal Working, Berlin; Heidelberg Springer, 1995, p. 39 ).

The lubricant compositions provided according to the invention also have the advantage over the prior art that they manage with fewer, preferably even completely without auxiliaries and / or additional performance additives to achieve the desired lubrication performance. For example, they show good biostability even without the addition of biocides (see Example 7). The use of defoamers can also be dispensed with (see Example 6).

With the reduction in the use of auxiliary substances, there is the advantage of lower environmental impact through an improved CO ₂ balance and a reduced health risk for the environment and the user.

Another advantage of the composition according to the invention is the easier separation of foreign oil from a lubricant composition produced with the composition. This is especially true if it is a lubricant solution. If the liquid lubricant, especially the cooling lubricant solution, is contaminated with foreign oils during use, it can simply be skimmed off. Oils generally have a lower density than water and are poorly or not at all soluble in water. Accordingly, oils and / or fats accumulate preferably on the surface of the lubricant solution and can be easily removed there.

In further experiments it was also possible to show that the lubricant composition according to the invention, in particular the cooling lubricant solution, shows a certain insensitivity to different degrees of hardness of the water (example 5).

The "water hardness" is the concentration of the salts of alkaline earth metals dissolved in water, in particular of the alkaline earth metal ions, preferably calcium and magnesium. If the concentration of alkaline earth metals is high - the water is very hard - the ions contained therein can react with ionic compounds contained in the lubricant composition. In the case of cooling lubricant emulsions in particular, a high sensitivity to hard water is observed, since the emulsions generally contain emulsifiers (e.g. fatty acids). These can react with the alkaline earth metal ions. This often results in unwanted deposits that can adversely affect the performance of the cooling lubricants. This makes complex softening processes necessary, which can result in increased lubricant costs.

Since the compositions according to the invention only contain components that are water-soluble and form a homogeneous solution in water, lubricant compositions formed with them preferably have no emulsifiers. Therefore, they show a greater insensitivity to unwanted reactions with ions of the alkaline earth metals from hard water. Thus, the formation of unfavorable deposits or an associated loss of performance can be reduced. In addition, there is no need for complex softening processes.

For the purposes of the invention, the term “solution” is defined as a homogeneous distribution of molecularly disperse particles in a liquid medium. All particles are present in a molecular dispersion. They therefore all form a common phase. A solution is therefore different from a multi-phase system in which one phase is the dispersant in which the other phases are distributed (ie dispersed), such as an emulsion or suspension.

The composition according to the invention is therefore at the same time characterized in that it does not form an emulsion or suspension after being brought together with water and that no mini, nano or microemulsion is formed or is contained therein. Likewise, micelles, vesicles or mesophases, such as lamellar systems, are not present after the addition of water.

XC compounds (C = carbon; X as defined below) in the sense of the invention are compounds which have at least one element (X) - carbon (C) bond. They can also be referred to as "organo-organic compounds". The bond between X and C includes compounds with element-carbon-σ-bond, π-bond or even ionic bond. The elements (X) of the element-carbon bonds are selected independently of one another from silicon (Si), nitrogen (N), phosphorus (P) or sulfur (S).

If several salts and / or organo-element compounds are contained in the compositions according to the invention, these can interact and / or react with one another. In particular, ion exchange reactions are possible in the case of the inorganic or organic element salts.

In a preferred embodiment, the compositions according to the invention are therefore obtainable by bringing together at least two inorganic salts of component (A) or at least two compounds of component (B) which are defined as herein or from at least one inorganic salt of component (A) and at least a compound of component (B) as defined herein.

In a particularly preferred embodiment, the composition according to the invention contains both component (A) and component (B). It is particularly preferred that the composition according to the invention consists of these components. If these compositions are used to produce a lubricant composition, the composition itself - that is to say without further additives, auxiliaries or solvents - can constitute the lubricant composition. The composition can be used in solid or liquid form as a lubricant composition. However, other constituents, such as additives such as a corrosion inhibitor or a pH regulating agent, can optionally also be added to the composition to produce the lubricant composition, if appropriate in addition to a solvent (see below).

The fact that components (A) and (B) taken individually and together when water is added form a homogeneous solution means that they are also characterized in that the surface tension of water changes when the composition is added not at all, or only barely changed. In a preferred embodiment, the surface tension of water changes by adding component (A) or component (B) or mixtures thereof by a maximum of 10%, preferably by a maximum of 7.5%, particularly preferably by a maximum of 5% and in particular by a maximum of 2 % is reduced.

The "surface tension" is also referred to as specific surface energy. It is a force that acts on liquids at the boundary with a gas or vacuum tangential to the interface. By adding certain substances, the surface tension of liquids can be changed significantly. The measurement of the change in surface tension is known to the person skilled in the art. It can e.g. according to the following standards: ASTM D 1331; ISO 6889; DIN EN 14210.

A preferred method for determining the surface tension is the bubble pressure method, based on ASTM D 3825, and the drop volume method based on ASTM D 2285 (see also Example 2).

A particularly preferred aspect of the invention relates to the use of the composition according to the invention as a performance additive for producing a lubricant composition, in particular for metal cutting or for forming processes. A performance additive is a substance or a mixture of substances that measures the lubricating performance of a lubricant composition in performance tests aimed at lubricating performance, such as the four-ball device (VKA) for determining the welding force in accordance with DIN 51350-2 and / or the cross-cylinder test for determining the Reichert value (see Example 3) improved.

It can be particularly advantageous if no further performance additive is added to the lubricant composition.

In a preferred embodiment, the composition or the lubricant composition contains no oil, wax or fat, especially no mineral oil, synthetic oil, vegetable oil or animal fat. The composition or lubricant composition is therefore preferably free of oil, wax or fat, in particular free of natural or synthetic wax, in particular free of microcrystalline wax, paraffin wax, polyethylene wax, polypropylene wax, carnauba wax or mixtures thereof.

It is also preferred that the composition and lubricant composition contain no solid ingredients such as resins.

Without being bound by any scientific theory, the good lubricating performance of the composition according to the invention and of the lubricant composition produced with this composition could be due to an interaction between the metal surface and the inorganic salts and / or the element-organic compound. A tribologically active layer could be formed between the metal surface and the composition according to the invention by physisorption or chemisorption. The viscosity of the composition does not seem to play a significant role in the lubrication performance.

"Adsorption" means the attachment of atoms or molecules to a surface. Depending on the type of binding forces between atom or molecule and surface, a distinction is made between physisorption and chemisorption.

"Physisorption" is a weak adsorption on surfaces that is comparable to the strength of Van Der Waals forces in molecules. The electronic structures of adsorbate and surface remain largely unchanged during the physisorption.

The term "chemisorption" denotes a type of adsorption on surfaces in which the adsorbed molecules are held in place by a chemical bond on the surface of the solid. The electronic structures of adsorbate and surface are therefore changed in the case of chemisorption.

Particularly advantageous embodiments of the invention are explained in detail below.

In addition to the resulting advantages by adjusting the weight ratio between component (A) and (B), it is also advantageous if components (A) and (B) each have a solubility in water at 25 ° C. of at least 25 g / L, preferably of at least 50 g / L, more preferably of at least 100 g / L, particularly preferably of 200 g / L, particularly preferably of at least 500 g / L.

The "solubility" of a substance indicates the extent to which a pure substance can be dissolved in a solvent. It can also be given as the ratio of substance mass to volume of the solution. The unit of solubility is g / L.

In a further preferred embodiment, component (A) contains inorganic salts with sulfur (S), nitrogen (N), phosphorus (P) or mixtures thereof. Compositions in which component (A) contains sulfur (S) or phosphorus (P) or mixtures thereof are preferred.

Compositions are particularly advantageous in which component (A) contains a group selected from sulfide, sulfite, sulfate, thiosulfate, disulfite, tetrathionate, sulfonate, ammonium, nitride, nitrate, phosphide, phosphite, phosphate, diphosphate, polyphosphate, Pyrophosphate, metaphosphate or salts or mixtures thereof. Component (A) particularly preferably contains a group selected from the group consisting of sulfite, disulfite, thiosulfate, phosphate, polyphosphate, pyrophosphate, metaphosphate or salts or mixtures thereof, component (A) particularly preferably contains a group selected from the group consisting of from sodium sulfite, sodium disulfite, sodium thiosulfate, sodium phosphate, sodium tripolyphosphate, sodium pyrophosphate, sodium hexametaphosphate or mixtures thereof.

Component (B) is preferably selected from the group consisting of organophosphorus, organosulfur, nitrogen-organic compounds or mixtures thereof, preferably organophosphorus, organosulfur compounds or mixtures thereof, more preferably organophosphorus or organosulfur compounds, particularly preferably from organophosphorus compounds.

In a particularly preferred embodiment, component (B) contains at least one group which is selected from the group consisting of sulfate, thiosulfate, disulfite, Tetrathionate, sulfonate, phosphate, phosphonate, bisphosphonate, oligophosphonate, polyphosphonate, ammonium or salts or mixtures thereof, preferably from sulfate, sulfonate, phosphate, phosphonate, bisphosphonate, oligophosphonate, polyphosphonate or salts or mixtures thereof, further preferably sulfonate, phosphate, phosphon, Bisphosphonate, oligophosphonate, polyphosphonate or salts or mixtures thereof, particularly preferably phosphonate, bisphosphonate, oligophosphonate, polyphosphonate or salts or mixtures thereof, in particular component (B) is selected from the group consisting of bisphosphonates or salts thereof.

The term "phosphonate" denotes compounds of the structural formula R-PO (OH) ₂ , where R is preferably an organic radical. R is preferably selected from the group of alkyl, alkenyl or aryl radicals; particularly preferred are optionally functionalized radicals which contain N, P, O or S. In particular, the optionally functionalized phosphonates can be aminophosphonates.

Compounds containing the structural unit - [P (O) ORO] _n - are designated as oligophosphonates. The parameter n denotes the number of repetition units. For oligophosphonates, this is in the range from 3 to 20.

The term "polyphosphonate" denotes compounds of the structural unit - [P (O) ORO] _n - where polyphosphonates have more than 20 repeating units n.

It has been shown that cooling lubricants or cooling lubricant solutions with particularly advantageous properties can be obtained if component (B) contains bisphosphonates.

The use of 1,1-diphosphonic acids or their salts, in particular 1-hydroxyethane-1,1-diphosphonic acid or its salt (i.e. etridronic acid), has proven to be advantageous.

In a very particularly preferred embodiment of the invention, component (B) is therefore selected from the group consisting of 1-hydroxyalkane-1,1-diphosphonic acid, 1-hydroxyalkene-1,1-diphosphonic acid, 1-aminoalkane-1,1-diphosphonic acid, 1-hydroxy-3-aminoalkane-1,1-diphosphonic acid, 3-amino-1-hydroxyalkane-1,1-diphosphonic acid, 1-hydroxy-4-aminoalkane-1,1-diphosphonic acid, 1-amino-4-hydroxyalkane 1,1-diphosphonic acid, alkylamino-1-hydroxyalkane-1,1-disphosphonic acid or their salts or mixtures thereof, preferably 1-hydroxyalkane-1,1-diphosphonic acid, 1-aminoalkane-1,1-diphosphonic acid, 3-amino-1-hydroxyalkane-1,1-diphosphonic acid, 1-hydroxy-3-aminoalkane-1,1-diphosphonic acid, alkylamino-1-hydroxyalkane-1,1-disphosphonic acid or their salts or mixtures thereof, more preferably 1- Hydroxymethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-disphosphonic acid, 1-hydroxypropane-1,1-diphosphonic acid, 3-amino-1-hydroxypropane-1,1-diphosphonic acid, 1-hydroxybutane-1,1- diphosphonic acid, 1-hydroxy-3-aminopropane-1,1-diphosphonic acid, 4-dialkylamino-1-hydroxybutane-1,1-diphosphonic acid or their salts or mixtures thereof, particularly preferably 1-hydroxyethane-1,1-disphosphonic acid, 1- Hydroxypropane-1,1-diphosphonic acid, 3-amino-1-hydroxypropane-1,1-diphosphonic acid or their salts or mixtures thereof, in particular 1-hydroxyethane-1,1-diphosphonic acid.

"Alkane" denotes an organic hydrocarbon compound with the general formula C _n H _{2 n +2} . The term "alkane" is used to designate molecules to indicate that it is the backbone of the molecule under consideration. The term "alkane" also includes substituted alkanes, unless explicitly stated otherwise.

"Alkene" denotes an organic hydrocarbon compound with the general formula C _n H _2n , which contain at least one double bond. The term "alkene" also includes optionally substituted alkenes, unless explicitly stated otherwise.

“Optionally substituted” means that hydrogen atoms in the corresponding molecule or in the corresponding radical can be replaced by substituents. If a molecule is substituted, either all of the hydrogen atoms can be replaced by substituents or the hydrogen atoms can only be partially replaced by substituents.

The term "alkyl" means a part of a molecule consisting of carbon atoms and hydrogen atoms. Alkyl radicals have the general formula -C _n H _{2n + 1} . The term "alkyl" is derived from the underlying "alkane", from which a hydrogen atom has been removed. The term "alkyl" is used nomenclaturally to indicate that it is a side chain of the molecule. "Alkyl" also includes optionally substituted alkyl radicals, even if this is not specifically stated.

The term "alkenyl" radical denotes a part of a molecule which consists of optionally substituted carbon atoms and hydrogen atoms. For example, an alkenyl group with a double bond has in particular the general formula -C _n H _2n-1 . However, alkenyl groups can also have more than one double bond. The number of hydrogen atoms varies depending on the number of double bonds in the alkenyl group. Examples of alkenyl groups are vinyl, allyl, 2-butenyl and 2-hexenyl.

"Aryl" residue means a part of a molecule that contains an aromatic group. An "aromatic group" means cyclic, planar aromatic hydrocarbons. The aromatic group can in particular be monocyclic, bicyclic or tricyclic. An aromatic group can also contain heteroatoms selected from the group consisting of N, O, P and S. Examples of aromatic groups are benzene, naphthalene, anthracene, phenanthrene, furan, pyrrole, thiophene, isoxazole, pyridine and quinoline, the necessary number of hydrogen atoms being removed in each case in the abovementioned examples in order to enable inclusion in the corresponding structural formula. For example, in a structural formula HO-R * -CH ₃ , where R * is an aromatic group with 6 carbon atoms, especially benzene, two hydrogen atoms would be removed from the aromatic group, especially benzene, to allow inclusion in the structural formula .

A composition containing component (A) selected from the group consisting of sulfite, disulfite, thiosulfate, phosphate, polyphosphate, pyrophosphate, metaphosphate or mixtures thereof and component (B) selected from sulfonate, phosphate, phosphonate, bisphosphonate or mixtures is particularly preferred from it.

In a particularly advantageous embodiment, the composition contains component (A) selected from the group consisting of sulfite, disulfite, thiosulfate, phosphate, polyphosphate, pyrophosphate, metaphosphate or mixtures thereof, and component (B) selected from the group consisting of 1-hydroxyethane -1,1-disphosphonic acid, 1-hydroxypropane-1,1-diphosphonic acid, 3-amino-1-hydroxypropane-1,1-diphosphonic acid or their salts or mixtures thereof. Even more preferred is a composition with the components (A) sodium sulfite, sodium disulfite, sodium thiosulfate, sodium phosphate, sodium tripolyphosphate, sodium pyrophosphate, sodium hexametaphosphate or mixtures thereof and component (B) selected from etidronic acid, sodium etidronate, potassium etidronate or mixtures thereof.

According to a preferred embodiment of the invention, the composition contains both component (A) and component (B). It was found that

Compositions with particularly advantageous properties result if at least 40% by weight of component (A), preferably at least 50% by weight of component (A), more preferably at least 60% by weight of component (A), particularly preferably at least 80% by weight of component (A), in particular at least 90% by weight of component (A), based on the total weight of components (A) and (B) are present.

The weight ratio of components (A) and (B) is preferably in the range between 40:60 to 95: 5.

In a further preferred embodiment, the weight ratio of components (A) and (B) is at least 40:60, preferably at least 50:50, more preferably at least 60:40, particularly preferably at least 70:30, in particular at least 80:20 lies.

In a particular aspect of the invention, the above-described compositions contain only solids. Accordingly, in a preferred embodiment, the compositions are solid compositions. These can be in any form, for example powder or granules.

It may be advantageous to compact the composition according to the invention in solid form. This applies in particular to powder. Conventional compaction methods, such as cold pressing, sintering, hot pressing or rolling, can be used for the compacting. Granules can be obtained by conventional methods such as wet granulation or dry granulation.

The compositions can be used without further processing as a lubricant or, after dilution with a solvent, preferably water, for example as a cooling lubricant.

If the composition is in solid form, it may be advantageous to process it into tablets ("tabs"). The tablets can be obtained from granules or powder by means of conventional compression processes. This embodiment primarily facilitates the transport and storage of the composition before it is processed into lubricant compositions.

In one embodiment of the invention, the tablet additionally contains a disintegrant. Conventional explosives are familiar to the person skilled in the art in this area. Preferred disintegrants are selected, for example, from the group consisting of starch, cellulose derivatives, alginic acids, dextrans and cross-linked polyvinylpyrrolidones and gas-developing substance mixtures such as e.g. Sodium bicarbonate and citric or tartaric acid or mixtures thereof.

1. (i) Bereitstellen einer Zusammensetzung enthaltend die Komponenten (A) und/oder (B), vorzugsweise (A) und (B);
2. (ii) Kompaktieren dieser Zusammensetzung, zum Beispiel durch Walzenkompaktierung;
3. (iii) Granulieren der Schmiermittelzusammensetzung, und
4. (iv) Kompression der Granulate zu Tabletten.

In addition to the compositions, the invention therefore also relates in a particular aspect to a method for providing a solid composition for producing a lubricant composition, comprising the following steps:

1. (i) providing a composition comprising components (A) and / or (B), preferably (A) and (B);
2. (ii) compacting this composition, for example by roller compaction;
3. (iii) granulating the lubricant composition, and
4. (iv) compression of the granules into tablets.

The compositions according to the invention in solid form, preferably as powder, granules or - particularly preferably - in the form of tablets can form a lubricant composition, in particular a cooling lubricant for metalworking, in particular for metalworking, by adding water.

Accordingly, in a further aspect, the invention also relates to the use of a composition according to the invention for producing a lubricant solution, in particular a cooling lubricant solution, preferably for metal cutting. This composition is preferably in the form of a tablet or a powder. In particular, the tablet can be made as described herein.

However, the composition can also be used directly for the production of a lubricant composition without compacting or further processing. For this purpose, it is preferably mixed with water, in particular only with water.

By setting a certain ratio between the composition and water, various cooling lubricant compositions can be produced. A lubricant composition which contains at least 80% by weight of water is particularly advantageous. This shows a consistently good cooling effect.

In a particularly preferred embodiment of the invention, the lubricant composition contains at least 85% by weight of water, more preferably at least 90% by weight of water, particularly preferably at least 95% by weight of water. The upper limit for water is typically 99% by weight.

Experience has shown that the cooling lubricants according to the invention, which have a high water content, are particularly advantageous for use in metal cutting. Cooling lubricants containing a cooling liquid with a high enthalpy of vaporization are particularly preferred. The "enthalpy of vaporization" refers to the amount of heat needed to bring a specified amount of liquid from a liquid to a gas (i.e., to evaporate it). Water has a standard enthalpy of vaporization (25 ° C) of 43 kJ / mol. This is particularly high compared to many other liquids, i.e. the liquid can use a lot of energy e.g. absorb in the form of heat before it changes to the gaseous state.

In one embodiment of the invention, the concentration of component (A) and / or component (B) in the case of the lubricant compositions according to the invention is in the range from 1 to 20% by weight, preferably 1 to 15% by weight, particularly preferably 5 to 10 % By weight, based on the total weight of the lubricant composition.

Alternative lubricant compositions which have a higher concentration of component (A) and / or component (B) in the range from 25 to 95% by weight are also referred to as concentrates for the purposes of the invention. In a preferred embodiment of the invention, the concentration of component (A) and / or component (B) is therefore 25 to 95% by weight, preferably 30 to 80% by weight, particularly preferably 35 to 60% by weight. %.

In addition to the composition according to the invention, the lubricant composition can contain customary additives which vary according to the particular

Direction of application of the lubricant and can be added to improve selected properties of the lubricant composition according to the invention. The auxiliary substances are advantageously water-soluble. Accordingly, it advantageously forms a homogeneous solution even after the auxiliaries have been added. The particularly preferred lubricant compositions are therefore also solutions.

However, the invention also includes lubricant compositions which, after the addition of auxiliaries, are present as disperse or colloidally disperse compositions, optionally also as emulsions. In addition to components (A) and / or (B), preferably (A) and (B), which in each case result in a homogeneous solution when water is added, lubricant compositions which include surface-active substances such as wetting agents or emulsifiers are also included contain.

The lubricant compositions according to the invention can in particular contain anti-corrosion agents. These are preferably selected from the group consisting of triazoles, thiadiazoles, organophosphoric acids, boric acid, boric acid derivatives, sulfonic acids, sulfonates, sulfonic acid esters, carboxylic acids or mixtures thereof. Benzotriazole, benzothiadiazole, maleic acid, malonic acid, isononanoic acid, citric acid, ascorbic acid or mixtures thereof are preferred.

The corrosion protection agent is preferably in the lubricant composition at a maximum of 10% by weight, preferably at most 5% by weight, further preferably at most 2% by weight, particularly preferably at most 1% by weight, in particular at most 0.1% by weight based on the total weight of the lubricant composition.

It has been shown that lubricant compositions which contain elemental organic compounds, in particular bisphosphonates such as etidronic acid, already have good corrosion properties, even with only a small amount or without the addition of anti-corrosion agents. This is due to the fact that these compounds themselves can have a protective effect against corrosion. This applies in particular to bisphosphonates such as etidronic acid.

In a particularly preferred embodiment, the corrosion protection agent is therefore in the lubricant composition containing component (B), preferably bisphosphonate, particularly preferably etidronic acid and its salts or mixtures thereof, in particular Etidronic acid, sodium etidronate and potassium etidronate or mixtures thereof, to a maximum of 2% by weight, preferably a maximum of 1% by weight, particularly preferably a maximum of 0.1% by weight, in particular a maximum of 0.01% by weight, based on the total weight of the Lubricant composition included.

PH regulators can also be included. These are preferably selected from the group consisting of inorganic acids or bases, preferably from the group consisting of alkali or alkaline earth metal hydroxides, elemental oxygen acids or mixtures thereof, preferably alkali metal hydroxides, phosphoric acids or phosphoric acid derivatives or mixtures thereof, in particular sodium hydroxide, potassium hydroxide or phosphoric acid. Sodium hydroxide, potassium hydroxide or mixtures thereof are very particularly preferred.

These pH regulators are advantageously added to the lubricant compositions according to the invention such that the pH of the lubricant composition is between 6 and 10, preferably between 7 and 9, particularly preferably 9.

The lubricant compositions can also contain humectants, which are preferably selected from the group consisting of alcohols, multiple alcohols, polyols or mixtures thereof. Glycerol, ethylene glycol, propylene glycol and polyethylene glycols with molar masses less than 1000 g / mol are preferred.

It may also be useful to add a biocide to the lubricant composition. However, since the use of the compositions according to the invention, as set out above, can reduce the use of biocides, it is possible (and preferred) that the lubricant compositions, based on the total weight, are at most 1% by weight, preferably at most 0.1%. -%, particularly preferably a maximum of 0.01 wt .-% biocides.

Biocides can preferably be selected from the group consisting of isothiazolinones, carbamates, formaldehyde, formaldehyde depot substances, phenols, phenol derivatives, alcohols, amines, quaternary ammonium compounds, alkali pyrithiones or mixtures thereof. Isothiazolinones, alkali pyrithiones, amine oxides and quaternary ammonium compounds or mixtures thereof are very particularly preferred.

The addition of a wetting agent can also be advantageous. Because of the advantages of the composition according to the invention (see above), even small amounts of a wetting agent can be sufficient to improve the lubricating performance. They can be selected from the group consisting of ionic, amphoteric, non-ionic surfactants, polymer surfactants, detergents, soaps or mixtures thereof. In particular, the use of an ionic surfactant, such as preferably a mixture of castor oil, ricinoleic acid and sulfuric acid ester and their salts (“Turkish red oil”), leads to lubricant compositions with particularly advantageous properties. The use of non-ionic surfactants is preferably dispensed with.

The wetting agent in the lubricant composition is advantageously at most 2% by weight, preferably at most 1% by weight, more preferably at most 0.1% by weight, particularly preferably at most 0.01% by weight, based on the total weight of the lubricant composition contain.

If necessary, defoamers can also be added. These are preferably selected from the group consisting of silicones, siloxanes, organosiloxanes, phosphoric acid esters, mono- and diglycerides of fatty acids or mixtures thereof. Siloxanes, organosiloxanes or mixtures thereof are preferred.

The lubricant composition advantageously contains both a pH regulating agent and a humectant and an anti-corrosion agent.

Particularly preferred embodiments of the composition and lubricant composition according to the invention are described below.

• 20 bis 70 Gew.-% Wasser,
• 30 bis 80 Gew.-% von Komponente (A),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 5 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 5 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.In one embodiment, the lubricant composition contains the following components, or the lubricant composition can be obtained by bringing the following components together:

• 20 to 70% by weight of water,
• 30 to 80% by weight of component (A),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 5 wt .-% of an anti-corrosion agent, and
• 0 to 5% by weight of a humectant,

each based on the total weight of the lubricant composition.

• 20 bis 70 Gew.-% Wasser,
• 30 bis 80 Gew.-% von Komponente (B),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 5 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 5 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.In a further embodiment, the lubricant composition contains the following components, or the lubricant composition can be obtained by bringing the following components together:

• 20 to 70% by weight of water,
• 30 to 80% by weight of component (B),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 5 wt .-% of an anti-corrosion agent, and
• 0 to 5% by weight of a humectant,

each based on the total weight of the lubricant composition.

• 20 bis 70 Gew.-% Wasser,
• 20 bis 60 Gew.-% von Komponente (A),
• 5 bis 30 Gew.-% von Komponente (B),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 5 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 5 Gew. -% eines Feuchthaltemittels, jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.

In an alternative embodiment, the lubricant composition contains the following components, or the lubricant composition can be obtained by bringing the following components together:

• 20 to 70% by weight of water,
• 20 to 60% by weight of component (A),
• 5 to 30% by weight of component (B),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 5 wt .-% of an anti-corrosion agent, and
• 0 to 5% by weight of a humectant, each based on the total weight of the lubricant composition.

• 50 bis 95 Gew.-% Wasser,
• 5 bis 50 Gew.-% von Komponente (A),
• 0 bis 5 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 1 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 1 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.In another embodiment, the lubricant composition contains the following components, or the lubricant composition can be obtained by bringing the following components together:

• 50 to 95% by weight of water,
• 5 to 50% by weight of component (A),
• 0 to 5% by weight of a pH regulating agent,
• 0 to 1 wt .-% of an anti-corrosion agent, and
• 0 to 1% by weight of a humectant,

each based on the total weight of the lubricant composition.

• 50 bis 95 Gew.-% Wasser,
• 5 bis 50 Gew.-% von Komponente (B),
• 0 bis 5 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 1 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 1 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.In a further embodiment, the lubricant composition contains the following components, or the lubricant composition can be obtained by bringing the following components together:

• 50 to 95% by weight of water,
• 5 to 50% by weight of component (B),
• 0 to 5% by weight of a pH regulating agent,
• 0 to 1 wt .-% of an anti-corrosion agent, and
• 0 to 1% by weight of a humectant,

each based on the total weight of the lubricant composition.

• 50 bis 95 Gew.-% Wasser,
• 5 bis 30 Gew.-% von Komponente (A),
• 5 bis 30 Gew.-% von Komponente (B),
• 0 bis 5 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 1 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 1 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.In one embodiment, the lubricant composition contains the following components, or the lubricant composition can be obtained by bringing the following components together:

• 50 to 95% by weight of water,
• 5 to 30% by weight of component (A),
• 5 to 30% by weight of component (B),
• 0 to 5% by weight of a pH regulating agent,
• 0 to 1 wt .-% of an anti-corrosion agent, and
• 0 to 1% by weight of a humectant,

each based on the total weight of the lubricant composition.

• 50 bis 90 Gew.-% von Komponente (A),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 20 Gew. -% eines Feuchthaltemittels, sowie
• 0 bis 10 Gew.-% eines Korrosionsschutzmittels,

jeweils bezogen auf das Gesamtgewicht der Zusammensetzung.In one aspect of the invention, the composition according to the invention contains the following components, or the composition can be obtained by bringing the following components together:

• 50 to 90% by weight of component (A),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 20% by weight of a humectant, and
• 0 to 10% by weight of an anti-corrosion agent,

each based on the total weight of the composition.

• 50 bis 90 Gew.-% von Komponente (B),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 20 Gew. -% eines Feuchthaltemittels, sowie
• 0 bis 10 Gew.-% eines Korrosionsschutzmittels,

jeweils bezogen auf das Gesamtgewicht der Zusammensetzung.In a further aspect of the invention, the composition according to the invention contains the following components, or the composition is obtainable by bringing the following components together:

• 50 to 90% by weight of component (B),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 20% by weight of a humectant, and
• 0 to 10% by weight of an anti-corrosion agent,

each based on the total weight of the composition.

• 40 bis 90 Gew.-% von Komponente (A),
• 10 bis 40 Gew.-% von Komponente (B),
• 0 bis 30 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 10 Gew. -% eines Feuchthaltemittels, sowie
• 0 bis 10 Gew. -% eines Korrosionsschutzmittels,

jeweils bezogen auf das Gesamtgewicht der Zusammensetzung.In an alternative aspect, the composition contains the following components, or the composition can be obtained by bringing the following components together:

• 40 to 90% by weight of component (A),
• 10 to 40% by weight of component (B),
• 0 to 30% by weight of a pH regulating agent,
• 0 to 10% by weight of a humectant, and
• 0 to 10% by weight of an anti-corrosion agent,

each based on the total weight of the composition.

It has been shown that the lubricant compositions according to the invention have good performance in the four-ball apparatus (VKA) for determining the welding force in accordance with DIN 51350-2 . Furthermore, good results are achieved in the so-called cross-cylinder test (XCT) for these lubricant compositions.

Good performance was also shown in the Tapping Torque Test (TTT). It was found that the addition of a humectant, in particular glycerol, has an advantageous effect on the performance in the TTT. The tests were carried out in accordance with the guideline (ASTM D 5619) (Example 3). Through torque and temperature detection, this test system allows proof of crucial process parameters during the forming and machining process.

The use of the lubricant compositions according to the invention, in particular as a lubricant solution, also allows simplified monitoring of the process control, in particular with regard to the consumption or loss of lubricant components. The use of just one solution has the advantage that conventional methods such as spectrometric, titrimetric or electroanalytical methods can be used to determine and monitor the concentration, in particular of components (A) and / or (B). This allows simple detection (monitoring) of the consumption of lubricant components, in particular components (A) and / or (B) during the metalworking process.

For this purpose, the lubricant composition can be introduced into a detection unit, for example after contact with the workpiece, in order to determine the consumption of components of the lubricant composition. However, the detection unit can also be part of the metalworking device, directly or indirectly.

1. (i) Bereitstellung einer erfindungsgemäßen Schmiermittelzusammensetzung
2. (ii) In Kontakt bringen des Werkstücks mit der Schmiermittelzusammensetzung
3. (iii) Bestimmung der Konzentration mindestens einer Komponente der Schmiermittelzusammensetzung, insbeosndere der Komponenten (A) und/oder (B), vorteilhafterweise mittels eines spektrometrischen, titrimetrischen oder elektroanalytischen Verfahrens.

In a further aspect, the invention therefore relates to a method for quality control of lubricant compositions in a metalworking process, comprising the following steps:

1. (i) Provision of a lubricant composition according to the invention
2. (ii) contacting the workpiece with the lubricant composition
3. (iii) Determining the concentration of at least one component of the lubricant composition, in particular components (A) and / or (B), advantageously by means of a spectrometric, titrimetric or electroanalytical method.

The lubricant composition used in this process can be used in solid or liquid form. However, if the lubricant composition is applied to the workpiece in solid form, it may be advantageous if it is transferred to an aqueous solution before the determination of components (A) and / or (B). Regardless of the original state of the lubricant composition, it can be diluted with water to determine the concentration.

A "spectrometric" method refers to a measurement based on spectroscopy. The term "spectroscopy" summarizes a group of physical methods, each of which breaks down radiation according to a specific property, such as energy, mass or wavelength.

A "titrimetric" method describes a measuring method for the quantitative determination of a substance using titration. "Titration" is a process in which a solution whose concentration is known is brought into contact with a sample of unknown concentration. The volume of the solution used is measured and the unknown concentration of the sample is calculated using the stoichiometry.

The term “electroanalytical” method denotes a measurement method for the quantitative determination of a substance with the aid of the measurement of electrical currents and / or voltages. The electroanalytical method comes from the main categories of potentiometry, coulometry, amperometry or voltammetry (e.g. polarography).

After the quantitative determination of a lubricant component, the consumption of the component can be compensated for again by adding a desired amount of this component (“subsequent dosing”). A desired setpoint can thus be achieved again.

A further advantageous aspect of the invention therefore relates to a method for regulating the concentration of lubricant components, in particular components (A) and / or (B), in a lubricant composition. It is advantageously a lubricant solution.

It can therefore be advantageous to link the device for metal processing either directly or indirectly (structurally or functionally) to a refill tank.

Optionally, it is also possible to dilute the lubricant components with a liquid, preferably water, before they are added to the refill tank.

1. (i) Ermitteln der Konzentration der Schmiermittelkomponente (Istwert), insbesondere mindestens eines Bestandteils der Komponente (A) und/oder (B) und
2. (ii) Nachdosieren der Komponente auf eine gewünschte Konzentration (Sollwert).

One aspect of the invention accordingly relates to a method for regulating the concentration of at least one component in a lubricant composition, in particular a lubricant solution, comprising the following steps:

1. (i) determining the concentration of the lubricant component (actual value), in particular at least one component of component (A) and / or (B) and
2. (ii) Subdosing the component to a desired concentration (setpoint).

EXAMPLES

The invention is explained in more detail below with experimental examples.

General manufacturing processes Example 1 - Production of Cooling Lubricant Compositions According to the Invention

Solutions of the cooling lubricant compositions were prepared. Solution 1 % By weight water 53.30 Sodium disulfite 16.00 Sodium tripolyphosphate 2.00 Etidronic acid 8.00 Anticorrosive 0.70 pH regulator 20.00 Solution 2 % By weight water 44.30 Sodium disulfite 35.00 Anticorrosive 0.70 pH regulator 5.00 Wetting agent 15.00

Depending on the use, the lubricant composition can be adjusted to the desired concentration by adding water.

Synthesis protocol

The alkaline components are first dissolved in water. The acidic components are then optionally added. The pH is particularly preferred with the addition of a pH control agent in the range from 6 to 10, preferably from 7 to 9 set to 9. Then, if necessary, sulfur-containing components are added and the pH is again adjusted to the desired range 8 to 10, in particular 9. This is followed by the optional addition of further additives, for example biocides, wetting agents or humectants.

Diluted solutions are illustrated by the following examples as further possible embodiments: Solution 3 % By weight water 85.70 Etidronic acid 8.00 Benzotriazole 0.10 Glycerin 1.20 phosphoric acid 5.00 Solution 4 % By weight water 89.30 Sodium tripolyphosphate 5.00 Etidronic acid 1.50 Benzotriazole 0.10 Glycerin 1.10 phosphoric acid 3.00 Solution 5 % By weight water 90.20 Sodium sulfite 5.00 Etidronic acid 1.60 Benzotriazole 0.10 Glycerin 1.10 phosphoric acid 2.00

Example 2 - Determination of surface tension using the example of solution 1

The dynamic surface tension was determined using a tensiometer by the bubble pressure method (based on ASTM D 3825). For this purpose, a gas was pressed through a cannula into the lubricant solution according to the invention (solution 1, example 1) and, for comparison, in water. The bubble surface formed in the process bulged and thereby continuously reduced the bubble radius. The surface tension was determined via the bubble pressure. By varying the rate of bubble formation, the surface tension was determined as a function of the surface age (dynamic surface tension.

The static surface tension was determined in accordance with ASTM D 2285 by the drop volume method.

For this purpose, the number of drops was determined, which results from a specified volume of liquid. The measurement was carried out with the lubricant composition according to the invention (solution 1) and for comparison with water.

Both measurements with the lubricant composition according to the invention (solution 1) showed that no measurable reduction in the surface tension compared to water could be observed.

Example 3 - Determination of the performance of the lubricant compositions 1. Production of the test coolants

For the determination of the welding force and the determination of the Reichert value, different lubricant compositions were produced, each of which contained 5% by weight of the performance additives according to the invention, based on the total weight of the lubricant composition (see KSS 1 to 5). A cooling lubricant emulsion (comparative example) not according to the invention was produced as a comparison test and compared with the cooling lubricants according to the invention in the following test methods.

The general synthesis of cooling lubricants (KSS) was carried out according to the protocol already described in Example 1.

2. Carrying out the test procedures: 2.1. Determination of the torque during thread production using the tapping torque test system (TTT system) according to ASTM D5619

The torque during thread production was determined using a TTT system at 25 ° C and a speed of 800 rpm. The core of the TTT system consists of a torque-monitored thread production unit supplemented with standardized measuring equipment (TTT standard) and an evaluation and analysis software. The thread production unit consists of a tool that is in contact with an aluminum block for thread forming brought. Pre-drilled holes were formed during the test. The performance of the lubricant compositions used was tested by means of torque and temperature detection during thread production using the following test coolants (KSS 5 and 7): KSS 5 % By weight water 92.00 Sodium tripolyphosphate 5.00 Etidronic acid 1.50 Anticorrosive 0.10 Humectant 1.00 pH regulator 0.40 KSS 7 % By weight water 83.30 Etidronic acid 8.00 Benzotriazole 0.10 Glycerin 0.60 pH regulator 8.00

The torque was determined as the value for the power expended. The lubricant composition to be tested was filled into the pre-drilled holes and the tool was brought into contact with the aluminum block.

2.2. Determination of the Reichert value in N / cm ²

A test cylinder was brought into contact with a rotating test ring. The abrasion surface had the shape of an ellipse. In order to determine the calotte diameter, the main axes of the ellipse were measured and the projection area of the abrasion surface could be calculated from the diameter. The pressing force combined with the projected abrasion coefficient then gave the Reichert value in N / m ² .

2.3. Determination of the welding force according to DIN 51350-2

The test cooling lubricants according to the invention (KSS 1 to 6) were tested in a four-ball system (DIN 51350-1) which consisted of a rotating ball (running ball) which slid under a specified test force on three balls of the same type (standing balls). The test force was gradually increased until the four-ball system was welded.

execution

The ball pot or ball holder, consisting of clamp, pressure plate and test balls, was carefully cleaned and dried in water and a residue-free solvent, preferably FAM gasoline.

The cleaned ball head is provided with three cleaned standing balls and firmly clamped with a clamping device. The ball cup is then filled with the lubricant composition without bubbles. The ball cup was filled so that the standing balls were covered and the ball holder of the running ball was not immersed in the lubricant. Ball cup and the lubricant composition were between 18 ° C and 40 ° C. The ball was pressed into the ball holder on the motor axis. After placing the ball pot with the tip of its mandrel on the depression of the turntable, the test force was applied, the test force being set according to defined load levels from 2000 N to a maximum of 7000 N. In addition, the drive motor was set to 1450 revolutions per minute.

The test force was increased to determine the welding force until the balls were welded together.

3. Evaluation of the test results 3.1. Tapping Torque Test (TTT)

The torque data were only evaluated if a successful transformation took place. The torque required for thread forming was not allowed to exceed a maximum value. Values that were above this maximum value were not detected. The test was repeated seven times if possible and the mean maximum torque was determined. The results for the different test coolants can be found in Table 1: <b> Table 1: Evaluation of the tapping torque test </b> Lubricant composition Number of holes Average torque [Ncm] KSS 7 7 69 KSS 8 7 69 Comparative example 7 76

3.2. Cross-cylinder test (XCT)

The Reichert values determined from the wear cap of a steel cylinder are summarized in Table 2. <b> Table 2: Test results from the cross-cylinder test </b> Lubricant composition Reichert value [N / m ² ] KSS 1 5430 KSS 2 37095 KSS 3 32835 KSS 4 5430 KSS 5 37095 KSS 6 32835 Comparative example 2751

3.3. Four-ball apparatus (VKA)

The VKA welding force of a lubricant composition was determined for the welding force by means of two matching individual measured values from three tests each. Table 3 summarizes the results thus obtained, giving the welding force in Newton N: <b> Table 3: Test results of the VKA welding power of the KSS </b> Lubricant composition Welding force [N] KSS 1 7000 KSS 2 6500 KSS 3 2800 KSS 4 7000 KSS 5 6500 KSS 6 2800 Comparative example <2000

Example 3 - Determination of the Corrosion Properties of Cooling Lubricants on Iron Chips According to DIN 51360-2 execution

To test the corrosion properties of the cooling lubricants, various cooling lubricant solutions of different concentrations were first prepared, as described in Example 3. Furthermore, iron filings were placed on a filter paper in a petri dish. Then 2 mL of the lubricant compositions to be examined were added to the iron filings. After 2 hours the lubricant composition and iron filings were removed.

evaluation

The filter paper was visually assessed for any rust residue.

The following figures show the corrosion properties of the test coolant solutions depending on the concentration:

The visual evaluation showed that no corrosion is observed in the lubricant compositions from a critical concentration of at least 5% by weight of the performance additive. At lower concentrations, for example 1% by weight, the iron filings were corroded.

Example 4 - Determination of back solubility

5 g of the solutions prepared were first dried in a crystallization dish at room temperature. Solubility was reconstructed by adding 5 g of water to the dried lubricant compositions and the time to clear solution formation was detected. If the experiment is carried out without swirling the solution after adding 5 g of water, the time to redissolution is <10 minutes. If the samples were swirled slightly after the addition of water, the complete redissolution was reached after <5 minutes.

The following figures illustrate the results of performing the redissolution attempt without swirling the solution:

The back solubility could be completely guaranteed. The majority of the components came off after only 10 seconds. The complete redissolution of the components could be observed after 7 minutes.

Example 5 - Determination of hard water stability

To determine the hard water stability, solutions 1 and 2 according to the invention were diluted with water of different degrees of hardness, so that solutions with 5% by weight of the composition according to the invention result. These solutions were checked for transparency and stability.

All lubricant compositions tested were clear, transparent and stable up to a hardness of 80 ° dH.

Example 6 - Foam Test

To carry out the shaking foam test, 50 ml of the composition according to the invention to be examined (solutions 1 and 2 and KSS 1 to 6) were placed in a mixing cylinder. The lubricant solution was then shaken vigorously 10 times with a handshake.

The examined solutions according to the invention as well as the test cooling lubricants showed no foaming.

Example 7 - Biostability test

To carry out the biostability test, the lubricant composition according to the invention (solutions 1, example 1) is inoculated with a contaminated sample. Immediately after the addition of the contaminated sample, the contamination was also found in solution 1. This disappeared again during the first 5 to 7 inoculations. It was only from the 8th cycle that a permanent germ load could be observed. However, independent germ growth without inoculation was not observed over a period of at least 10 weeks.

Embodiments Embodiment 1:

Composition for producing a lubricant composition containing a component (A), or a component (B) or mixtures thereof, component (A) comprising one or more inorganic salts and component (B) comprising one or more compounds comprising at least one structural unit
XC, in the
C = carbon and
X = silicon, nitrogen, phosphorus or sulfur, and X and C are linked to one another by means of a σ bond, π bond or ionic bond, a homogeneous solution being formed when water is added to the composition.

Embodiment 2:

Composition obtainable by bringing together at least two inorganic salts of component (A) or at least two compounds of component (B), which are as defined in embodiment 1, or of at least one inorganic salt of component (A) and at least one compound of component (B ), which is defined as in embodiment 1.

Embodiment 3:

Composition according to embodiment 1 or 2, wherein the surface tension of water is reduced by a maximum of 10%, preferably a maximum of 5%, particularly preferably a maximum of 2% when the composition is added.

Embodiment 4:

Composition according to one of the preceding embodiments, the composition comprising component (A) and component (B), preferably consisting thereof.

Embodiment 5:

Composition according to embodiment 4, wherein the weight ratio between component (A) and component (B) at least at 40:60, preferably is at least 50:50, more preferably at least 60:40, particularly preferably at least 70:30, in particular at least 80:20.

Embodiment 6:

Composition according to embodiment 4 or 5, wherein at least 40% by weight of component (A), preferably at least 50% by weight of component (A), more preferably at least 60% by weight of component (A), particularly preferably at least 80% by weight of component (A), in particular at least 90% by weight of component (A), based on the total weight of components (A) and (B) are present.

Embodiment 7:

Composition according to one of the preceding embodiments, wherein components (A) and (B) each have a solubility in water at 25 ° C. of at least 25 g / L, preferably of at least 50 g / L, more preferably of at least 100 g / L, particularly preferably of 200 g / L, particularly preferably of at least 500 g / L.

Embodiment 8:

Composition according to one of the preceding embodiments, component (A) containing sulfur (S), nitrogen (N), phosphorus (P) or mixtures thereof, preferably sulfur (S) or phosphorus (P) or mixtures thereof.

Embodiment 9:

Composition according to one of the preceding embodiments, wherein component (A) contains a group which is selected from sulfide, sulfite, sulfate, thiosulfate, disulfite, tetrathionate, sulfonate, ammonium, nitride, nitrate, phosphide, phosphite, phosphate, diphosphate, polyphosphate, Pyrophosphate, metaphosphate or salts or mixtures thereof, preferably from sulfite, disulfite, thiosulfate, phosphate, polyphosphate, pyrophosphate, metaphosphate or salts or mixtures thereof, in particular component (A) is selected from sodium sulfite, sodium disulfite, sodium thiosulfate, sodium phosphate, sodium tripolyphosphate, sodium pyrophosphate Sodium hexametaphosphate or mixtures thereof.

Embodiment 10:

Composition according to one of the preceding embodiments, wherein component (B) is selected from the group consisting of Organophosphorus, organosulfur, nitrogen-organic compounds or mixtures thereof, preferably from organophosphorus, organosulfur compounds or mixtures thereof, particularly preferably from organophosphorus or organosulfur compounds, in particular organophosphorus compounds.

Embodiment 11:

Composition according to one of the preceding embodiments, wherein component (B) contains at least one group which is selected from the group consisting of sulfate, thiosulfate, disulfite, tetrathionate, sulfonate, phosphate, phosphonate, bisphosphonate, oligophosphonate, polyphosphonate, ammonium or salts or mixtures thereof, preferably from sulfate, sulfonate, phosphate, phosphonate, bisphosphonate, oligophosphonate, polyphosphonate or salts or mixtures thereof, particularly preferably from phosphonate, bisphosphonate, oligophosphonate, polyphosphonate or salts or mixtures thereof, in particular component (B) is selected from the group the bisphosphonates or salts thereof.

Embodiment 12:

Composition according to one of the preceding embodiments, wherein component (B) contains at least one compound which is selected from the group consisting of 1-hydroxyalkane-1,1-diphosphonic acid, 1-hydroxyalkene-1,1-diphosphonic acid, 1-aminoalkane-1 , 1-diphosphonic acid, 1-hydroxy-3-aminoalkane-1,1-diphosphonic acid, 3-amino-1-hydroxyalkane-1,1-diphosphonic acid, 1-hydroxy-4-aminoalkane-1,1-diphosphonic acid, 1-amino -4-hydroxyalkane-1,1-diphosphonic acid, alkylamino-1-hydroxyalkane-1,1-diphosphonic acid or their salts or mixtures thereof, preferably 1-hydroxyalkane-1,1-diphosphonic acid, 1-aminoalkane-1,1-diphosphonic acid, 3-amino-1-hydroxyalkane-1,1-diphosphonic acid, 1-hydroxy-3-aminoalkane-1,1-diphosphonic acid, alkylamino-1-hydroxyalkane-1,1-diphosphonic acid or their salts or mixtures thereof, more preferably 1- Hydroxymethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxypropane-1,1-diphosphonic acid, 3-amino-1-hydroxypropane-1,1-diphosphonic acid, 1-hydroxybut an-1,1-diphosphonic acid, 1-hydroxy-3-aminopropane-1,1-diphosphonic acid, 4-dialkylamino-1-hydroxybutane-1,1-diphosphonic acid or their salts or mixtures thereof, particularly preferably 1-hydroxyethane-1, 1-disphosphonic acid, 1-hydroxypropane-1,1-diphosphonic acid, 3-amino-1-hydroxypropane-1,1-diphosphonic acid or its salts or mixtures thereof, in particular 1-hydroxyethane-1,1-diphosphonic acid or its salts or mixtures thereof.

Embodiment 13:

Composition according to one of the preceding embodiments, wherein component (B) is selected from etidronic acid, sodium or potassium etidronate or mixtures thereof.

Embodiment 14:

A composition according to any one of the above embodiments 1 to 13, which is solid.

Embodiment 15:

Composition according to one of the preceding embodiments, which contains a corrosion inhibitor which is preferably selected from the group consisting of triazoles, thiadiazoles, organophophoric acids, boric acid, boric acid derivatives, sulfonic acids, sulfonates, sulfonic acid esters, carboxylic acids or mixtures thereof, particularly preferably from benzotriazole, benzothiadiazole, Maleic acid, malonic acid, isononanoic acid, citric acid, ascorbic acid or mixtures thereof, benzotriazole is particularly preferred.

Embodiment 16:

Composition according to embodiment 14, wherein at most 10% by weight, preferably at most 5% by weight, more preferably at most 2% by weight, particularly preferably at most 1% by weight, in particular at most 0.1% by weight, of the corrosion protection agent based on the total weight of the composition is included.

Embodiment 17:

Composition according to one of the preceding embodiments, which contains a humectant, which is preferably selected from the group consisting of alcohols, multiple alcohols, polyols or mixtures thereof, particularly preferably from glycerol, ethylene glycol, propylene glycol and polyethylene glycols with molar masses less than 1000 g / mol, in particular glycerol is preferred.

Embodiment 18:

Composition according to one of the preceding embodiments, which contains a pH regulating agent which is preferably selected from the group consisting of inorganic acids or bases, more preferably from the group consisting of alkali or alkaline earth metal hydroxides, elemental oxygen acids or mixtures thereof, particularly preferably alkali metal hydroxides, Phosphoric acids or phosphoric acid derivatives or mixtures thereof, in particular sodium hydroxide, potassium hydroxide, phosphoric acid or mixtures thereof.

Embodiment 19:

• 50 bis 90 Gew.-% von Komponente (A),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 20 Gew. -% eines Feuchthaltemittels, sowie
• 0 bis 10 Gew.-% eines Korrosionsschutzmittels, jeweils bezogen auf das Gesamtgewicht der Zusammensetzung.

Composition according to one of the preceding embodiments, comprising the following components or obtainable by bringing together the following components:

• 50 to 90% by weight of component (A),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 20% by weight of a humectant, and
• 0 to 10% by weight of an anti-corrosion agent, in each case based on the total weight of the composition.

Embodiment 20:

• 50 bis 90 Gew.-% von Komponente (B),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 20 Gew. -% eines Feuchthaltemittels,
• 0 bis 10 Gew. -% eines Korrosionsschutzmittels, jeweils bezogen auf das Gesamtgewicht der Zusammensetzung.

Composition according to one of the preceding embodiments, comprising the following components or obtainable by bringing together the following components:

• 50 to 90% by weight of component (B),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 20% by weight of a humectant,
• 0 to 10% by weight of an anti-corrosion agent, in each case based on the total weight of the composition.

Embodiment 21:

• 40 bis 90 Gew.-% von Komponente (A),
• 10 bis 40 Gew.-% von Komponente (B),
• 0 bis 30 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 10 Gew. -% eines Feuchthaltemittels, sowie
• 0 bis 10 Gew. -% eines Korrosionsschutzmittels, jeweils bezogen auf das Gesamtgewicht der Zusammensetzung.

Composition according to one of the preceding embodiments, comprising the following components or obtainable by bringing together the following components:

• 40 to 90% by weight of component (A),
• 10 to 40% by weight of component (B),
• 0 to 30% by weight of a pH regulating agent,
• 0 to 10% by weight of a humectant, and
• 0 to 10% by weight of an anti-corrosion agent, in each case based on the total weight of the composition.

Embodiment 22:

Use of a composition according to one of the preceding embodiments for producing a cooling lubricant solution, which is in the form of a tablet or powder.

Embodiment 23:

Use of a composition according to one of the above embodiments as a performance additive in cooling lubricants.

Embodiment 24:

Use of a composition according to one of the above embodiments 1 to 21 as a performance additive in metal cutting.

Embodiment 25:

• 20 bis 70 Gew.-% Wasser,
• 30 bis 80 Gew.-% von Komponente (A),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 5 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 5 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.Lubricant composition containing the following components or obtainable by bringing the following components together:

• 20 to 70% by weight of water,
• 30 to 80% by weight of component (A),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 5 wt .-% of an anti-corrosion agent, and
• 0 to 5% by weight of a humectant,

each based on the total weight of the lubricant composition.

Embodiment 26:

• 20 bis 70 Gew.-% Wasser,
• 30 bis 80 Gew.-% von Komponente (B),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 5 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 5 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.Lubricant composition containing the following components or obtainable by bringing the following components together:

• 20 to 70% by weight of water,
• 30 to 80% by weight of component (B),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 5 wt .-% of an anti-corrosion agent, and
• 0 to 5% by weight of a humectant,

each based on the total weight of the lubricant composition.

Embodiment 27:

• 20 bis 70 Gew.-% Wasser,
• 20 bis 60 Gew.-% von Komponente (A),
• 5 bis 30 Gew.-% von Komponente (B),
• 0 bis 10 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 5 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 5 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.Lubricant composition containing the following components or obtainable by bringing the following components together:

• 20 to 70% by weight of water,
• 20 to 60% by weight of component (A),
• 5 to 30% by weight of component (B),
• 0 to 10% by weight of a pH regulating agent,
• 0 to 5 wt .-% of an anti-corrosion agent, and
• 0 to 5% by weight of a humectant,

each based on the total weight of the lubricant composition.

Embodiment 28:

• 50 bis 95 Gew.-% Wasser,
• 5 bis 50 Gew.-% von Komponente (A),
• 0 bis 5 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 1 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 1 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.Lubricant composition containing the following components or obtainable by bringing the following components together:

• 50 to 95% by weight of water,
• 5 to 50% by weight of component (A),
• 0 to 5% by weight of a pH regulating agent,
• 0 to 1 wt .-% of an anti-corrosion agent, and
• 0 to 1% by weight of a humectant,

each based on the total weight of the lubricant composition.

Embodiment 29:

• 50 bis 95 Gew.-% Wasser,
• 5 bis 50 Gew.-% von Komponente (B),
• 0 bis 5 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 1 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 1 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.Lubricant composition containing the following components or obtainable by bringing the following components together:

• 50 to 95% by weight of water,
• 5 to 50% by weight of component (B),
• 0 to 5% by weight of a pH regulating agent,
• 0 to 1 wt .-% of an anti-corrosion agent, and
• 0 to 1% by weight of a humectant,

each based on the total weight of the lubricant composition.

Embodiment 30:

• 50 bis 95 Gew.-% Wasser,
• 5 bis 30 Gew.-% von Komponente (A),
• 5 bis 30 Gew.-% von Komponente (B),
• 0 bis 5 Gew.-% eines pH-Regulierungsmittels,
• 0 bis 1 Gew.-% eines Korrosionsschutzmittels, sowie
• 0 bis 1 Gew. -% eines Feuchthaltemittels,

jeweils bezogen auf das Gesamtgewicht der Schmiermittelzusammensetzung.Lubricant composition containing the following components or obtainable by bringing the following components together:

• 50 to 95% by weight of water,
• 5 to 30% by weight of component (A),
• 5 to 30% by weight of component (B),
• 0 to 5% by weight of a pH regulating agent,
• 0 to 1 wt .-% of an anti-corrosion agent, and
• 0 to 1% by weight of a humectant,

each based on the total weight of the lubricant composition.

Embodiment 31:

Lubricant composition according to one of the above embodiments 25 to 30, which contains a wetting agent which is preferably selected from the group consisting of ionic, amphoteric, non-ionic surfactants, polymer surfactants, detergents, soaps or mixtures thereof. in particular from castor oil, ricinoleic acid and sulfuric acid esters and their salts or mixtures thereof.

Embodiment 32:

Lubricant composition according to embodiment 31, wherein at most 2% by weight, preferably at most 1% by weight, more preferably at most 0.1% by weight, particularly preferably at most 0.01% by weight of the wetting agent, based on the total weight of the lubricant composition is included.

Embodiment 33:

Lubricant composition according to one of the preceding embodiments 25 to 32, which contains a biocide which is preferably selected from the group consisting of isothiazolinones, carbamates, formaldehyde, formaldehyde depot substances, phenols, phenol derivatives, alcohols, amines, quaternary ammonium compounds, alkali pyrithione or mixtures thereof, particularly preferably from isothiazolinones, alkali pyrithione, amine oxides and quaternary ammonium compounds or mixtures thereof.

Embodiment 34:

Lubricant composition according to embodiment 33, which contains at most 1% by weight, preferably at most 0.1% by weight, particularly preferably at most 0.01% by weight, of the biocide, based on the total weight of the lubricant composition.

Embodiment 35:

Lubricant composition according to one of the above embodiments 25 to 34, the pH of the solution being in the range from 6 to 10, preferably from 7 to 9, particularly preferably 9.

Embodiment 36:

A lubricant composition according to any one of claims 25 to 35, wherein no non-ionic surfactants are included.

Embodiment 37:

Lubricant composition according to one of the preceding claims 25 to 36, wherein no oil, wax or fat, preferably no natural or synthetic wax, in particular no microcrystalline wax, paraffin wax, polyethylene wax, polypropylene wax, carnauba wax or mixtures thereof.

Embodiment 38:

Use of a lubricant composition according to one of the above embodiments 25 to 37 as a cooling lubricant in metalworking, in particular in machining metalworking.

Embodiment 39:

1. (i) Bereitstellen einer Zusammensetzung gemäß einer der vorstehenden Ausführungsformen 1 bis 21;
2. (ii) Kompaktieren der Schmiermittelzusammensetzung durch Kompaktierung, insbesondere Walzenkompaktierung;
3. (iii) Granulieren der Schmiermittelzusammensetzung; und
4. (iv) Kompression der Granulate zu Tabletten.

A method of making a lubricant rod comprising the following steps

1. (i) providing a composition according to any one of the above embodiments 1 to 21;
2. (ii) compacting the lubricant composition by compacting, in particular roller compacting;
3. (iii) granulating the lubricant composition; and
4. (iv) compression of the granules into tablets.

Embodiment 40:

1. (i) Bereitstellen einer Zusammensetzung gemäß einer der vorstehenden Ausführungsformen 1 bis 21;
2. (ii) Mischen der Zusammensetzung mit Wasser.

A method of making a lubricant composition comprising the following steps

1. (i) providing a composition according to any one of the above embodiments 1 to 21;
2. (ii) Mix the composition with water.

Embodiment 41:

1. (i) Bereitstellung einer Schmiermittelzusammensetzung gemäß einer der vorstehenden Ausführungsformen 25 bis 37;
2. (ii) In Kontakt bringen des Werkstücks mit der Schmiermittelzusammensetzung;
3. (iii) Bestimmung der Konzentration mindestens einer Komponente der Schmiermittelzusammensetzung, insbesondere der Komponenten (A) und/oder (B) gemäß einer der vorstehenden Ausführungsformen, vorzugsweise mittels eines spektrometrischen, titrimetrischen oder elektroanalytischen Verfahrens.

Process for quality control of lubricant compositions in a metalworking process comprising the following steps:

1. (i) providing a lubricant composition according to any of the above embodiments 25 to 37;
2. (ii) contacting the workpiece with the lubricant composition;
3. (iii) determining the concentration of at least one component of the lubricant composition, in particular components (A) and / or (B) according to one of the above embodiments, preferably by means of a spectrometric, titrimetric or electroanalytical method.

Embodiment 42:

1. (i) Ermitteln der Konzentration der Schmiermittelkomponente (Istwert), insbesondere mindestens eines Bestandteils der Komponente (A) und/oder (B) gemäß einer der vorstehenden Ausführungsformen, und
2. (ii) Nachdosieren der Komponente auf eine gewünschte Konzentration (Sollwert).

A method of replenishing a lubricant composition comprising the following steps:

1. (i) determining the concentration of the lubricant component (actual value), in particular at least one component of component (A) and / or (B) according to one of the above embodiments, and
2. (ii) Subdosing the component to a desired concentration (setpoint).

Claims (21)

Composition for the production of a lubricant composition comprising a component (A), or a component (B) or mixtures thereof, component (A) comprising one or more inorganic salts and component (B) comprising one or more compounds comprising at least one structural unit XC, in the
C = carbon and
X = silicon, nitrogen, phosphorus or sulfur,
and X and C are linked to one another by means of a σ bond, π bond or ionic bond, characterized in that a homogeneous solution is formed when water is added to the composition. Composition obtainable by bringing together at least two inorganic salts of component (A) or at least two compounds of component (B), or at least one inorganic salt of component (A) and at least one compound of component (B), each as defined in claim 1. Composition according to claim 1 or 2, characterized in that the surface tension of water when adding the composition is reduced by a maximum of 10%, preferably a maximum of 5%, particularly preferably a maximum of 2%. Composition according to one of the preceding claims, characterized in that the composition contains component (A) and component (B), preferably consists thereof. Composition according to Claim 4, characterized in that at least 40% by weight of component (A), preferably at least 50% by weight of component (A), more preferably at least 60% by weight of component (A), particularly preferably at least 80% by weight of component (A), in particular at least 90% by weight of component (A), based on the total weight of components (A) and (B). Composition according to one of the preceding claims, characterized in that components (A) and (B) each have a solubility in water at 25 ° C of at least 25 g / L, preferably of at least 50 g / L, more preferably of at least 100 g / L, particularly preferably of 200 g / L, particularly preferably of at least 500 g / L. Composition according to one of the preceding claims, characterized in that component (A) contains a group which is selected from the group consisting of sulfide, sulfite, sulfate, thiosulfate, disulfite, tetrathionate, sulfonate, ammonium, nitride, nitrate, phosphide, phosphite , Phosphate, diphosphate, polyphosphate, pyrophosphate, metaphosphate or salts or mixtures thereof, preferably from sulfite, disulfite, thiosulfate, phosphate, polyphosphate, pyrophosphate, metaphosphate or salts or mixtures thereof. Composition according to one of the preceding claims, characterized in that component (B) contains at least one group which is selected from the group consisting of sulfate, thiosulfate, disulfite, tetrathionate, sulfonate, phosphate, phosphonate, bisphosphonate, oligophosphonate, polyphosphonate, ammonium or Salts or mixtures thereof, preferably from sulfate, sulfonate, phosphate, phosphonate, bisphosphonate or salts or mixtures thereof, particularly preferably from phosphonate, bisphosphonate, or salts or mixtures thereof, in particular bisphosphonate or salts thereof. Composition according to one of the preceding claims, characterized in that component (B) is selected from the group consisting of etidronic acid, sodium or potassium etidronate or mixtures thereof. Composition according to one of the preceding claims 1 to 9, characterized in that it is solid. Composition according to one of the preceding claims, comprising the following components or obtainable by bringing together the following components: 40 to 90% by weight of component (A), 10 to 40% by weight of component (B), 0 to 30% by weight of a pH regulating agent, 0 to 10% by weight of a humectant, and 0 to 10% by weight of an anti-corrosion agent, each based on the total weight of the composition. Use of a composition according to one of the preceding claims 1 to 11 for producing a cooling lubricant solution, characterized in that it is in the form of a tablet or powder. Use of a composition according to one of the preceding claims 1 to 11 as a performance additive in cooling lubricants. Use of a composition according to any one of the preceding claims 1 to 11 as a performance additive in metal cutting. Lubricant composition containing the following components or obtainable by bringing the following components together: 20 to 70% by weight of water, 30 to 80% by weight of component (A), 0 to 10% by weight of a pH regulating agent, 0 to 5 wt .-% of an anti-corrosion agent, and 0 to 5% by weight of a humectant, each based on the total weight of the lubricant composition. Lubricant composition containing the following components or obtainable by bringing the following components together: 50 to 95% by weight of water, 5 to 50% by weight of component (B), 0 to 5% by weight of a pH regulating agent, 0 to 1 wt .-% of an anti-corrosion agent, and 0 to 1% by weight of a humectant, each based on the total weight of the lubricant composition. Use of a lubricant composition according to one of the preceding claims 15 or 16 as a cooling lubricant in metalworking, in particular in machining metalworking. A method of making a lubricant rod comprising the following steps (i) providing a composition according to any one of claims 1 to 11; (ii) compacting the lubricant composition by compacting, in particular roller compacting; (iii) granulating the lubricant composition; and (iv) compression of the granules into tablets. A method of making a lubricant composition comprising the following steps (i) providing a composition according to any one of claims 1 to 11; (ii) Mix the composition with water. Process for quality control of lubricant compositions in a metalworking process comprising the following steps: (i) providing a lubricant composition according to any one of claims 11, 15 or 16; (ii) contacting the workpiece with the lubricant composition; (iii) determining the concentration of at least one component of the lubricant composition, in particular components (A) and / or (B) according to one of the preceding claims, preferably by means of a spectrometric, titrimetric or electroanalytical method. A method of replenishing a lubricant composition comprising the following steps: (i) determining the concentration of the lubricant component (actual value), in particular at least one component of component (A) and / or (B) according to one of the preceding claims and (ii) Subdosing the component to a desired concentration (setpoint).