MX2012011224A

MX2012011224A - Use of water-based lubricants for textile machines.

Info

Publication number: MX2012011224A
Application number: MX2012011224A
Authority: MX
Inventors: Thomas Kilthau; Martin Schweigkofler
Original assignee: Klueber Lubrication Muenchen Se & Co Kg
Priority date: 2010-04-21
Filing date: 2011-04-18
Publication date: 2012-11-30
Also published as: ZA201207544B; DE102011016818A1; CA2794779A1; US20130035267A1; AU2011244683A1; DE102010015757A1; EP2561048A1; CA2794779C; BR112012027006A2; CN102884164A; WO2011131331A1

Abstract

The present invention relates to the use of water-based lubricants for textile machines, especially to the use as needle oil and/or lifter oil.

Description

USE OF AQUEOUS BASE LUBRICANTS FOR TEXTILE MACHINES DESCRIPTION OF THE INVENTION The invention relates to the use of water-based lubricants for textile machines, in particular to use as needle oils and / or plate oils in textile knitting machines.

Lubricants that must meet broad requirements are used to lubricate textile knitting machines. The compositions of an oil for needle or oil for stage should have a constant viscosity at different speeds and temperatures of the machine. In this case, the viscosity of operation the operating viscosity of the lubricant must fall in the range of ISO VG 15 - ISO VG 100. The compositions of the needle or platen oils must also be resistant to aging.

The lubricants have to be present in the form of a colorless and clear solution as much as possible. These colorless lubricants should have a good to excellent washability, for example washing ability in particular, it should be possible to wash the lubricants at low temperatures. When a lubricant can be washed only incompletely, this results in problems in the subsequent treatments of the woven fabrics by REF. 234454 points. In particular, a uniform dyeing of knitted articles is no longer possible and irreversible defects in color are the result.

In addition, lubricants must also have a long shelf life even at low temperatures, without the formation of precipitates. The formation of precipitates can result in plugging of the oil supply systems of the knitting machines.

The lubricant must also not have a tendency towards phase separation over the entire operating temperature range from 0 ° C to 80 ° C. The phase separation of the lubricant can result in poor lubrication of the parts of the machine and thus can result in non-uniformity of the knitted fabric, which can also result in defects in the knitted fabric. in the subsequent color treatment.

In addition to good protection against wear, breakage and corrosion, the lubricant must also have the lowest possible level of friction. This results in considerable energy savings in reducing the noise level, which in turn results in the improvement of working conditions.

In addition, the lubricant has to be slightly biodegradable, since the lubricant can enter the waste water via the washing process and correspondingly has to be treated and decomposed via the clarification process.

Textile oils that have been used over time, which are present in the form of an emulsion, in most cases consist of more than 80% mineral oil, to which the usual additives reducing wear and tear are added. the corrosion. In addition, emulsifiers are added to improve washing ability. In this context, anionic emulsifiers (e.g., sulfonates), and nonionic emulsifiers (e.g., fatty alcohol ethoxylates or even NPE) as well as cationic emulsifiers (e.g., quaternary ammonium compounds) may be used. Sometimes, small amounts of water (less than 1%) have to be added to textile oils that contain emulsifier, to stabilize them or reduce their tendency towards precipitation. Higher water concentrations result in unacceptably high turbidity by the formation of an emulsion, which results in phase separation, or may produce hydrolysis of the additives that are used.

Furthermore, it is known to apply the lubricating agent to the textile yarns by means of a roller, which runs on the corresponding yarn, being immersed in an emulsion of lubricating agent to facilitate the processing capacity of the yarns. For this end, a composition containing 50 to 80 parts by weight of poly (oxyethylene-oxy-1, 2-propylene) glycol, 10 to 40 parts by weight of emulsifier, and 10 to 40 parts by weight of an ester is described in the patent from US No. 3,338,830 A. This mixture is present as a concentrate, and is diluted with water, so that 1 to 25% by weight of the non-aqueous components is present and used in the form of an aqueous emulsion . From German Patent No. DE 30 08 500 C2, a water-soluble working fluid with metals, containing diethanol disulfide, and one or more water-soluble polyoxyalkylene glycols are known. This liquid is used to work metals, by which maximum pressure and anti-friction properties are ensured by the preparation of a sufficient quantity of liquid. The object of this invention is to prepare a water-based liquid lubricant for textile machines, with which the aforementioned drawbacks, which develop when a mineral oil is used, and which is present in the form of a solution, are overcome.

Thus, the lubricant can be used in textile machines, and this must be biodegradable, and must be washable at the lowest possible temperatures, as well as also used in a general service temperature range without phase separation, it must offer good protection against wear, breakage and corrosion, and should have a level of friction as low as possible.

According to this invention, therefore, a water-based lubricant is used for textile knitting machines, which contains from 5 to 50% by weight of the water-soluble polymer and / or from 5 to 50% by weight of emulsifier and water added up to 100% by weight.

In addition, the lubricant may also contain 0 to 15% by weight, in particular 2 to 5% by weight, of the corrosion reducing agent and protector, respectively; 0 to 10% by weight, in particular 0.2 to 5% by weight of the wear reducing agent and the protective agent, respectively; 0 to 1% by weight, in particular 0.01 to 0.75% by weight of biocide; and 0 to 50% by weight, in particular 2 to 25% by weight of an anti-icing agent.

The water-soluble polymer which is contained in the lubricant is selected from the group consisting of polyalkylene glycols, in particular polyethylene glycol with molecular weights of 1000 to 35,000, water-soluble esters, polyacrylates, polymethacrylates, polyvinylpyrrolidones, polyacrylamides, carboxymethylcellulose, polyanionic cellulose, hydroxycellulose , and hydroxyethylcellulose.

The emulsifier which is contained in the lubricant is selected from the group consisting of nonionic, anionic and cationic emulsifiers, in particular, alkylene oxide polymers, sulfonates, carboxylic acid and dicarboxylic acid derivatives, with a chain length of 6. to 16 carbon atoms, phosphate esters and quaternary ammonium compounds.

The corrosion and wear reducing agent that is contained in the lubricant is selected from the group consisting of water-soluble phosphorus and / or sulfur compounds, and nitrogen-containing compounds, the biocide is benzoic acid and the anti-formation agent. Ice is selected from the group consisting of low molecular weight glycols, in particular ethylene glycol, propylene glycol, trimethylene glycol, glycerol, salts or ionic liquids.

The lubricant according to the invention can also be used in the form of a concentrate. In this case, the reduced traffic of articles is mainly advantageous, since the finished formulation can be produced directly by the customers by dilution with water. In addition, the storage space that is required at the user's site is reduced. In addition, the user can adjust the lubricant directly to the desired viscosity for its application.

To ensure that the lubricant is biodegradable, that it can be washed, for example, removed at the lowest possible temperatures, that it can be used in the general service temperature range without phase separation, that it offers good protection against wear, the breaking and corrosion, and having a level of friction as low as possible, water is used as a carrier liquid. Special water-soluble additives, such as polyalkylene glycol and / or water-soluble esters, are added to this carrier liquid, and then the corresponding operating viscosity is established between ISO VG 15-ISO VG 100.

In this context, it is expressly stated that the following examples do not involve emulsions, but rather true, clear aqueous solutions. The application is exclusively the lubrication of machines or parts of machines, and not the lubrication / finishing of threads.

The advantageous properties of the lubricant according to the invention are shown on the basis of the following examples and in the Comparison Example.

EXAMPLES Example 1 The lubricant has the following composition: Distilled water 68.0% by weight Polymer soluble in water, polyglycol 8000 S, Clariant Company 22.0% by weight Polyalkylene glycol ether of alcohol, Marlo et 5056, Sasol Company 5.0% by weight Ester of boric acid and alkanolamines, Hostacor Bl, Clariant Company 2.0% by weight Sulfurized fatty acid, LUBIO EP 1, Scháfer Additive Systems GmbH 3.0% by weight Table 1 shows the results of the studies of the properties of the lubricating agent according to the invention, compared with those of a known lubricating agent, based on mineral oil.

Table 1 The KLM test is done as follows: In a petri dish (80 mm), a needle-spotted needle, purified with acetone (length 44 mm) is placed on a round filter (filter paper with a diameter of 55 mm, Whatman) and covered with 10 ml. of aqueous textile oil. After 48 hours of storage at room temperature, the needle (black dots) and the filter paper (yellow-red color) are checked for corrosion.

The results of the study, shown in Table 1, can be summarized as follows. The lubricant that is produced according to the invention is a clear, virtually colorless solution, the full washing capacity is itself added without washing agents at low temperatures, which makes considerable savings in energy possible. The level of friction that is drastically reduced compared to conventional needle oils allows us to expect a clearly improved energy efficiency, as well as a lower noise level, and extended retention times during operation. By exchanging the mineral oil or a basic oil corresponding to the latter by water, a larger objective is placed on the durability with the lubricant of this invention.

Example 2 Distilled water 68.0% by weight Polymer soluble in water, polyglycol 2000 S, Clariant Company 22.0% by weight Polyalkylene glycol ether of alcohol, Marlowet 5056, Sasol Company 5.0% by weight Ester of boric acid and alkanolamines, Hostacor Bl, Clariant Company 2.0% by weight Sulfurized fatty acid, LUBIO EP 1, Scháfer Additive Systems GmbH 3.0% by weight Example 3 Distilled water 68.0% by weight Polymer soluble in water, polyglycol 2000 S, Clariant Company 22.0% by weight Polyalkylene glycol ether of alcohol, Marlowet 5056, Sasol Company 5.0% by weight Toliltriazole, Rheinchemie Company 2.0% by weight Sulfurized fatty acid, V 345, Scháfer Additive Systems GmbH 3.0% by weight In Table 2, the properties of the formulations of Examples 2 and 3 are listed.

Table 2 Here also, the comparison with the Comparison Example shows the excellent properties of the use according to the invention of a water-based lubricant, according to Examples 2 and 3.

Example 4 Distilled water 60.0% by weight Dicarboxylic acid ethoxylate soluble in water 35.0% by weight Sulfurized fatty acid 3.0% by weight Ester of boric acid and alkanolamines 2.0% by weight Example 5 Distilled water 60.0% by weight Dicarboxylic acid ethoxylate soluble in water 17.0% by weight Water-soluble polyethylene glycol 18.0% by weight Sulfurized fatty acid 3.0% by weight Ester of boric acid and alkanolamines 2.0% by weight In Table 3, the properties of the formulations of Examples 5 and 6 are listed.

Table 3 Advantageously, the water that is used can be used in the distilled / demineralized form and as tap water, which simplifies a possible application in the form of a concentrate.

To achieve the required operating viscosity of ISO VG 15 - ISO VG 100, it may be necessary to adjust the aqueous lubricant to a lower viscosity. By evaporating a portion of the water at the friction site, the target viscosity is then achieved.

The emulsifiers that are optionally contained in the lubricant comprise all nonionic, anionic and cationic systems from the cleaning agents and metal working agents industry.

Examples of the nonionic emulsifiers which are used are alkylene oxide polymers, such as alcohol ethoxylates consisting of, for example, ethylene oxide and / or propylene oxide with alkylene oxide units of from 5 to 50, and radicals linear or branched alkyl with a chain length of 10 to 20 carbon atoms.

Examples of anionic emulsifiers are sulfonates, carboxylic acid, and dicarboxylic acid derivatives with a chain length of 6 to 16 carbon atoms, as well as phosphate esters.

Examples of cationic emulsifiers are quaternary ammonium compounds.

The water-soluble polymers comprise polyalkylene glycols, whereby polyethylene glycols with molar masses of 1000 to 35000 are preferred. In addition, water-soluble esters, such as, for example, polyacrylates or polymethacrylates, as well as polyvinylpyrrolidones and polyacrylamide, can be used. cellulose or cellulose derivatives, in particular carboxymethylcellulose, polyanionic cellulose, hydroxycellulose, and hydroxyethylcellulose. The desired viscosities can be adjusted by different molecular weights of the polymers.

Typical, usable, corrosion and wear reducing additives originate from the (cold) lubricant industry and comprise water-soluble phosphorus-containing and / or sulfur-containing compounds as well as boron compounds, such as boric acid derivatives, or nitrogenous compounds, such as, for example, triazole derivatives or VCIs (volatile corrosion inhibitors, for example, secondary amines).

To prevent bacterial growth in the aqueous solution, accompanied by sludge formation, bactericidal aggregates can be added, for example, benzoic acid. To improve the behavior at low temperature, anti-icing agents can be used, such as low molecular weight glycols, in particular, ethylene glycol, propylene glycol, trimethylene glycol, glycerol, salts or ionic liquids.

The advantages of the lubricant according to the invention can be listed as follows: These can be washed, for example, washed with tap water at room temperature without washing agents, and in this way energy is saved in the washing process, Water contamination significantly reduced by the removal of mineral oil and washing agent; A clarification step can be eliminated.

It is noted that in relation to this date the best method known by the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims

CLAIMS Having described the invention as above, the content of the following claims is claimed as property:

1. The use of a water-based lubricant that contains: 5 to 50% by weight of water soluble polymer and / or 5 to 50% by weight of emulsifier water added up to 100% by weight as needle oil and / or platinum oil in textile knitting machines, in particular in circular and flat knitting machines.

2. The use of a water-based lubricant, according to claim 1, wherein the lubricant further contains: 0 to 5% by weight, in particular 2 to 5% by weight of a corrosion reducing agent, 0 to 5% by weight, in particular 0.2 to 5% by weight of a wear reducing agent, 0 to 1% by weight, in particular 0.01 to 0.75% by weight of biocide, 0 to 50% by weight, in particular 2 to 25% by weight of an anti-icing agent.

3. The use of a water-based lubricant according to claim 1 or 2, wherein the water-soluble polymer that is contained in the lubricant is selected from the group consisting of polyalkylene glycols, in particular polyethylene glycol with molar masses of 1000 to 35,000, water-soluble esters, polyacrylates, polymethacrylates, polyvinylpyrrolidones, polyacrylamides, carboxymethylcellulose, polyanionic cellulose, hydroxycellulose, and hydroxyethylcellulose.

4. The use of a water-based lubricant according to claim 1 or 2, wherein the emulsifier which is contained in the lubricant is selected from the group consisting of non-ionic, anionic and cationic emulsifiers, in particular alkylene oxide polymers, sulfonates, carboxylic acid and dicarboxylic acid derivatives with a chain length of 6 to 16 carbon atoms, phosphate esters and quaternary ammonium compounds.

5. The use of a water-based lubricant according to claim 1 or 2, wherein the corrosion and wear reducing agent that is contained in the lubricant is selected from the group consisting of phosphorus and / or sulfur compounds. , water-soluble, nitrogen-containing compounds, the biocide is benzoic acid, and the anti-icing agent is selected from the group consisting of low molecular weight glycols, in particular ethylene glycol, propylene glycol, trimethylene glycol, glycerol, salts or ionic liquids.

6. The use of a lubricant according to any of claims 1 to 5, in the form of a concentrate.