MXPA96002747A - Lubrican compositions - Google Patents

Abstract

The present invention relates to: A concentrate with high pH that upon dilution with water forms a lubricant composition for use in the lubrication of conveyor belts, said concentrate having a pH of 7 to 11 comprises the following components: (a) (i) ) an alkylamine dicarboxylate compound of the general formula (I), wherein R1 is a saturated or unsaturated alkyl group of C8 to C18, which includes mixtures of such alkyl groups, n is an integer from 1 to 12, preferably n is 2 and each of M1 to M2, which may be the same or different, independently represent hydrogen or a group or metal of group (I), typically sodium or potassium, and with the proviso that the distribution of chain lengths of the alkyl of the group R1 is such that the components (a) and (b) remain in solution, and / or (ii) a compound of the general formula (II), wherein R1 is an alkyl group of C8 to C18 as defining, R1 represents hydrogen or - (CH2) m -OH where I s an integer from 2 to 12, and each of Y1 and Y2 which may be the same or different, are independently selected from -CH2 OH, -COOoM3o and -CH2COOoM3o, wherein M3 is hydrogen or a metal of group I, typically sodium or potassium, (b) a cyclic imidazoline of the general formula (III), wherein R3 is a saturated or unsaturated alkyl group of C7 to C20, and (c) a saturated or unsaturated alkylsulphonate anionic surfactant of C12 to C18 and (d) optionally, a pH reducing agent to provide said pH on the scale of 7 to

Description

LUBRICATING COMPOSITIONS FIELD OF THE INVENTION The present invention relates to lubricant compositions, and more specifically to ubiquitous compositions for use in the lubrication of treads that transport bottles, canisters and similar containers and beverage packaging from a station. to another in a bottling plant.

BACKGROUND OF THE INVENTION Beverages are sold in a variety of containers such as glass bottles, plastic bottles, plastic containers, tin cans, or waxed cardboard packaging. These containers are transported through a number of stations in a plant where they are filled with the desired beverage; the containers are transported from one station to another by a tread which is usually stainless steel when the containers are glass bottles, or a plastic material such as acetal resin (sold under the trademark DeJrin) when the containers are different to glass bottles. Such treads will hereinafter be referred to as "conveyor belts".

When the containers are being filled with beverage in a filling station in the bottling plant, it is held in a fixed position under the filling station while the conveyor belt continues to move forward below the container. In addition, the blockage of the path along which the containers are displaced may occur if a container falls or becomes stuck. In such cases it is important that the conveyor belt is suitably lubricated so that the belt can continue to move even though the containers on the belt are temporarily prevented from moving forward. In order to ensure the smooth operation of the filling procedure it is imperative to ensure that the conveyor belt is properly lubricated and clean. If the conveyor belt is not properly lubricated, the containers may fall easily or not stop when they reach the appropriate station in the plant. This can cause a serious deterioration of the efficient operation of the filling process. The lubricant compositions which are currently used for the lubrication and cleaning of the conveyor belt are generally of three main types: (i) fatty acid-based compositions, (ii) compositions based on amines and houses, and (iii) compositions based on phosphate esters.

Aqueous fatty acid solutions are not suitable for use in hard water areas, unless they are stabilized by the incorporation of a complexing agent such as ildiamintetraacetic acid (EDTA). A further problem that may be encountered with the compositions based on fatty acids or amines or on phosphate esters is that those known formulations are very aggressive for the coloring pigments used to label the surfaces of the containers, particularly steel and aluminum containers used in the beverage industry. It has been found that those known lubricating compositions have a marked tendency to leach the printed information on the surface of the containers. US Pat. No. 3,57,100 discloses a conveyor belt lubricant composition comprising an aqueous solution of (a) a phosphate ester of an oleyl alcohol ethoxylate and < b) an amphoteric compound soluble in water. A new lubricant composition has been produced for use in the conveyor belt lubrication which has the advantage that it does not cause fading of the colors in the printed information on the containers that are being processed through the filling plant. The lubricating compositions of the present invention can also be used in hard water areas.

BRIEF DESCRIPTION OF THE INVENTION In accordance with one aspect of the present invention, a high pH concentrate is provided which upon dilution with water forms a lubricant composition compatible with printing for use as a lubricant for conveyor belt, said concentrate comprising the following components: a) (i) an alkylamine dicarboxylate compound of the general formula (I) (CHat), -, C00-M.X * / R ~ N (i) \ wherein R is a saturated or unsaturated alkyl group of C? a Cxa, which includes mixtures of alkyl groups, n is an integer from 1 to J2, preferably n is 2, and each of Mi and MJK, which may be the same or different, independently represent hydrogen or a metal of group I, typically sodium or potassium, and with the proviso that the distribution of the alkyl chain lengths of the Rx group is such that components (a) and (b) remain in solution? and / or (ii) a compound of the general formula (II) CHaYa. / Rx - C - N - CH.? - CH. ,, - N (II) 0 R_. CHaYa, where R is an alkyl group of C? to Cxt¡ > As it was defined before, R_ > represents hydrogen or - (CHa.) m -OH where m is an integer from 2 to J2, and each of Y and Y-, which can be the same or different sec, are independently selected from -CH »0H, - COO-N- -CHBC0 ~ M: 3 *, where M; 3 e «hydrogen or a metal of group I, typically sodium or potassium; (b) a cyclic imidazoline of the general formula wherein R "is a saturated or unsaturated alkyl group of C7 to Cso; < c > an anionic surfactant of saturated or unsaturated alkyl sulfonate of C12 to Cxe, and (d) optionally, a pH reducing agent for providing said pH on a scale of 7 to 11.

DESCRIPTION OF THE PREFERRED MODALITIES OF THE INVENTION In the Rx group of component (a), the distribution of alkyl chain lengths may be such that the product is stable and components (a) and (b) do not leave solution. This is achieved, for example, if the alkyl chain of the R group is predominantly an alkyl group of Cisa, for example, a mixture of alkyl groups as obtained from toco acid, or a mixture of an alkyl group of Cx__ not saturated (i.e., oleyl) with said mixture of predominantly Ci.sub.-alkyl. Therefore, when component (a) is an alkylamine dicarboxylate of the formula (I), it is preferably a coconut-amine dipropionate salt, or a mixture of said coconut / amine salt, with dipropionate salt bath. of olei lamina. Those salts are typically monosodium salts. - These dialkyl dicarboxylate compounds can be frequently referred to in the art as alkyl betaine compounds and are intended to be interchangeable insofar as they describe various aspects of the invention. In a particularly preferred embodiment of the concentrate of the present invention, component (a) comprises a mixture of said salts of oleyl- and co-amine dipropionate, preferably in a 1: 2 weight ratio of oleyl-dipropionate. amine: coco-amine dipropionate. The coconut-amine dipropionate salt is made from coconut acid, whose acid is a mixture of long chain fatty acids having chain lengths ranging from C? a C a with a preponderance of Cxo, Cx_. and Cil +. When component (a) is a compound of formula (II), a compound of said formula is preferable where R is an oleyl group or a coconut group as defined above, R._ is a group -CH; -4 -, OH YY,; ^ They ended up. A particularly preferred compound of the formula (II) is a compound of the formula: CH2CH2COO? Na? (Coco) - C - N - CH2CH2 - N II I CH2CH2COO? Na® 0 CH2CH2OH The compounds of the general formula (I) and of the general formula (II) are readily available. For example, the oleyl amine dipropionate and the mentioned coconut-amine dipropionate salts are sold by Lakeland Laboratories Ltd of Manchester, England as oleyl betaine - Lakeland ODA - (onosodium salt of olei dipropionate sheet) and cocaine betaine - Lakeland AMA - (monosodium salt of coco amine dipropionate). These materials are sold as active solutions at $ 30. The compounds of the general formula (II) are available from Rhone Poulenc and sold under the trademark MIRANQL. These materials are sold as solutions that are active from 37- ^ 5. Typically, component (a) is used in an active amount from O.1 * to 16 weight percent, based on the total weight of the concentrate. More preferably, the active amount of component (a) used to form the concentrate of the present invention ranges from 3.8 to 13% by weight. These & Scales are applied if the component (a) is a dicarboxylate dlqu i lamina d_ the general formula (I) or a compound of the general formula (II). Component (b) is a cyclic imidazoline of the general formula (III) as described above. In those compounds, Ra is preferably a saturated or unsaturated alkyl group of £,? to C tít, more preferably an unsaturated alkyl group of C? -. Typically, the cyclic imidazoline is used in an active amount from 0.35 to 14% by weight, based on the total weight of the concentrate, more preferably, the active amount of the cyclic imidazoline compound used to form the concentrate varies from 3 to 10% by weight. weight, based on the total weight of the concentrate. The materials of the general formula (III) are also commercially available. For example, an imidazoline of this type in which R ^ is an unsaturated alkyl group of CX? is supplied by Lakeland Laboratories Ltd as Imidazoline 160H. This material is sold as a liquid that is typically active at 65-71%, with an average activity of 68%. Component (c) is an anionic alkyl sulfonate surfactant and is preferably an anionic olefin sulfonate surfactant. Surfactants of this general type are commercially available materials, for example, the above-mentioned anionic olefin sulfonate surfactant is sold by Hoec.h t AG as Hostaμur Gs and ie sold as a 40% active solution. Typically, the aniunic alkylsulfonate surfactant is present in the concentrate in an active amount from 0.2 to 5% by weight, based on the total weight of the concentrate. In the preferred proportions, the active amount of the anionic alkylsulfonate surfactant ranges from 0.2 to 1% by weight, based on the total weight of the concentrate. The components (a) and (b) are incorporated in the present compositions to provide the desired lubrication properties. Preferably the ratio by active weight of component (a) to component (b) is 0.9-1.4: 1. The alkyl sulfonate surfactant, component (c>, is included in the current compositions as a hydrotrope, i.e. , acts to stabilize the formulation to thereby avoid phase separation, particularly of the diluted solutions that occur when the concentrate is diluted with water.The alkylsulfonate surfactant plays no active role in the lubrication process nor does it appear to have no function to prevent pigment leaching of the printing inks used on the containers being transported through the bing plants It has been found that it is possible to include an additional component in the concentrates of the present invention. if up to 3% by weight is incorporated, based on the total weight of the concentrate, of (d) a nonionic surfactant which is an alcohol The linear or branched alcochalate or alkoxylated phenol, each having 5-20 units of ethoxylation, in the concentrate of the invention, the stain handling characteristics of the resulting lubricant compositions are emitted. This surfactant seems not to take part in the lubrication, in the stability of the composition or in the protection of the pigment on the printed surface of the container. A preferred nonionic surfactant is an iso-C? A-C? A alcohol having 12 ethoxylation units. These surfactants are commercially available; for example, a material of this type is sold by BASF AG or Luteneol T0129 and is said to be 88% active. When a nonionic surfactant of this type is incorporated as component (d) in the concentrates of the present invention, it is usually present in an active amount from 0.5 to 10% by weight, preferably from 1 to 5% by weight, in based on the total weight of the concentrate. The concentrates of the present invention are typically prepared by dissolving the cyclic i-idazolines (component b) in a mixture of water and isopropanol. The solution is stirred until the imidazoline has dissolved, in which component (a) is then introduced. When component (a) comprises a mixture of oleylamine dicarboxylate and coco-amine dicarboxylate, the procedure is that the oleylamine dicarboxylate is first introduced and the solution is gently stirred and heated to a temperature of approximately 60 ° C. ° C until a viscous paste is obtained (usually about half an hour). Finally, the olefin sulfonate surfactant (component c) is added to the formulation. The pH of the formulation can be varied from 7 to 11 depending on the properties required. It has been observed that at lower pH values for good lubrication of the concentrate with delay coefficients of 0.15 - 0.16 are executed. However, the best compatibility of the pigment is observed at high pH values. A pH value of about 9 to 11 is preferred for optimum pigment compatibility. To reduce the pH of the formulation, as necessary, add an appropriate acid. It has been found that the addition of a simple acid such as acetic acid results in an unstable product. Acids having hydrotropic properties have been found suitable. Examples of such hydrotrophic acids are caprylic acid and neodecanoic acid. Neodecanoic acid is the preferred; Surprisingly, the resulting product remains stable in hard water. The use of caprylic acid results in a product that is not stable in hard water. According to a further aspect of the present invention there is provided a lubricant composition for and as a lubricant for conveyor belt, said lubricant composition comprising a concentrate as defined above diluted with 60.00 to 99.99 parts by volume of water. More typically, the concentrates of the present invention are included with 99.0 to 99.9 parts by volume of water. The compositions of the present invention are usually sold as concentrates and are diluted for use as transparendata band lubricants. The typical use concentrations of the formulation were from 0.1 to 1% vol / vol made in water. The exact concentration depends on factors such as the speed of the conveyor belt, the type of packaging or container that is transporting the belt, the total load on the conveyor belt and the amount of fouling caused by the spill. Dilution of the concentrated lubricant is usually done in a central spout, and the diluted lubricant composition is then pumped to spraying nozzles at the point of use. There are some areas of the conveyor belt that require very little lubricant. Typically these are the areas that are before the filler and before the pasteurizer.

In these regions, secondary dilution is often used. The lubricant can also be at its highest use concentration in the filler.

The lubricant solutions are typically sprayed «On the conveyor from the fan charro nozzles placed at the beginning of each band section. For particularly large operations, the secondary spray jets can be placed along the length of the band. In areas of heavy soiling it may be necessary to spray lubricant continuously on the belt. However, in most cases the contralaters plan to vary the ____ rate of dosing. Typically the on and off times will be between 10 and 90 seconds. The shutdown times are not always equal to the ignition times. It is also possible that the fixes of time controllers vary throughout the plant. In some applications, a final water wash will be placed at the end of a bottle / container filling band. This will wash the lubricant residues from the package before placing them in cages and from the office. The excess lubricant will be dropped from the belt either to the floor or to appropriate drip pans. In any case, it will eventually enter drainage and water treatment systems. As stated above, it was found that the lubricating compositions of the present invention have the particular advantage that they are compatible with the printing of the container, ie they do not leach quickly the printing of the surface of the containers that are being transported.

Of the conveyor belt that is lubricated by said lubricating compositions. In addition, the lubricant compositions of the invention can also be used in hard water areas without any apparent adverse effect. The present invention is illustrated by the following examples.

EXAMPLE 1 A concentrate suitable for use in dilution with water as a conveyor belt lubricant was formulated in the following manner from the components determined in the following table: % P / p material Concentration% Global active act in the formulation Imidazol ina 180H 5.4 3. 7 Lakeland ODA 5. 7 1. 7 L akeland AMA 10.4 3.1 Hostapur OS 1 .0 0.4 Isopropyl Alcohol 5.7 5.7 Soft Water (<5ppm 71.8 71.8 CaCo3) In reference to the table, Imidazalin 180H is a compound of the general formula (III) in which R3 is a Cx-, unsaturated alkyl group and supplied by Laboratories Ltd with a liquid that is 65-71% active. Lakeland ODA is an oleylane dipropionate (monosodium salt) ie a compound of the general formula (I) sold by Lakela d Laboratories Ltd co or an active 30% solution. Lakeland AMA is a caproamine dipropionate (monosodium salt), ie a compound of the general formula (I), sold by Lakeland Laboratories Ltd as a 30% active solution. Haßtapur OS is an anionic surfactant agent of oleyl sulfonate, that is to say the constituent (c) sold by Hcechst AT as a 40% active material. Imidazoline 180H (component c) was added to the mixture of isopropyl alcohol and soft water. The resulting solution was stirred until the imidazoline was completely dissolved. Lakeland ODA (component (a): oleylamine dipropionate) was then added to the solution and stirred for up to 30 minutes with moderate heating to 60 ° C. During this mixing process, the mixing vessel was sealed to prevent the loss of volatile material. The resulting product was a viscous paste. Lakeland AMA (component (a): coco-amine dipropionate) was added to the pulp and stirred until the mixture had cooled to room temperature. The mixture in this stage was a transparent solution. 6 Finally, Host μur OS (component ib): anionic surfactant agent) was added to the solution. The resulting formulation has a pH between 10 and 11. It was found that the product is stable when diluted to 1% in hard water and does not cause fading of the printing ribbons used on the surface of printed aluminum packages., that is to say, the formulation is compatible with the ionization on the aluminum containers. The foaming of the product shown in the foregoing block is typically diluted in water for use as a lubricant of a conveyor belt. The typical use concentrations are 0.1 to 1% vol / vol.

EXAMPLE 2 Following the procedure described in Example 1, an alternative aqueous concentrate formulation was prepared from the components established in the following table: f Material of% p / p Concentration% Global active asset in the formulation Imidazoline 180H 5.4 3.7 Lakeland ODA 5.4 1.7 Miranol C2M3F 10.4 3.9 Hostapur OS 1.0 0.4 Isopropyl alcohol 5.7 5.7 Soft water 72.5 72.5 Apart from Miranol C-2MSF, the components are the same as those described in example 1. Miranol C2MSF is a composed of the general formula (II) of the structure CH2CH2COO? NaI (Coconut) - C - N - CH2CH2 - N II I CH2CH2COO? Nae O CH2CHjOH and is supplied by Rhone Poulenc as an eolution that is said to be 39% active. As will be seen, this formulation is similar to that described in Example 1, except that the akeland material AMA, that is to say the coco-amine dipropionate) is replaced by the marterial Miranol C2MSF described above. The properties of the resulting formulation were very similar to those of the formulation of Example 1.

EXAMPLE 3 Tests were carried out to evaluate the ink compatibility of the different lubricant compositions of this invention as well as their lubrication capacity at various pH levels. The lubrication capacity of the test composition was measured using an apparatus comprising a moving conveyor on top of which a stationary load cell is mounted. A dynamic load is placed • upstream of the load cell and a static load is placed coi-rieta above the dynamic load. In order to test the lubrication capacity or drag coefficient u, a four-kilogram glass bottle was placed on the t-rapsp-D-band and represented the dynamic load, while the static load consisted of 10 600-gram glass bottles. Fl drag coefficient was calculated based on; μ = drag (q) dynamic load weight (g) For the aluminum containers, the dynamic load was replaced with can containers to give a load of 3.6 kilograms and the static charge consisted of 10 aluminum / steel cans. The coefficient of drag ee calculated in accordance with the previous formula. The duration of the lubricant composition was also evaluated. The duration was measured as the time taken by the drag coefficient to increase up to 0.25 after the disconnection of the lubricant supply to the conveyor belt while the dosing on the conveyor belt with water is continued during that monitoring period. Both the coefficient of drag co or the duration are a measure of the effectiveness of the lubricant. A good lubricant has a low coefficient of drag, a high lubricant in the duration and quickly reaches the lubrication of t i i i br i o. In order to test the printing compatibility of the different lubricants of this invention with the ink that is used to mark aluminum cans or steel cans, the following ink compatibility test was performed. This is an aggressive testing method that is considered to resemble the conditions that a beverage might experience in a pasteiza izadar. In detail, the test strips were cut from aluminum beverage containers printed predominantly with red ink. Each strip has dimensions of approximately 20 mm by 60 mm. The contact of the strips with the lubricant was obtained by placing the strips in lubricant solutions at 65 ° C. In addition, these solutions were shaped to a concentration of approximately 10 times the maximum expected use concentration. For this type of formulation, the maximum use concentration is expected to be approximately 0.5% w / w, since the test solutions were made up to 0.5% w / w in soft water (< 10 calcium carbonate) . The contact time was between 1 and 24 hrs during which time the temperature was maintained at 65 ° C. At the end of this period, the strip was removed from the solution and compared qualitatively against a control formulation known to be benign to ink. Arbitrary units were assigned to reflect the aggressive removal step of the printed pigment. A lower unit value indicates a slight ink removal, if any, as a value * upper unit indicates an aggressive pigment removal. The control standard states that a scale of 1 indicates a benign action, while a scale of 4 indicates an unacceptable aggressive action of the lubricant. The formulations of Example 1 were tested and identified by composition numbers D853; D854; D855 and D856. The only difference in each composition is that the pH was adjusted to the level noted in the following table 1. QUAUHO 1 Absence of pH - * Increased ink caapatibility. ? «- Incra-en or lubricant efficiency From the above table, it is apparent that acceptable printing compatibility was obtained with formulations D856 and D855. The formulation of D854 with a pH of 7.2 is comprised to be at the outermost edge of the acceptance of print compatibility, although from Table 1, it is apparent that at a pH of approximately 9.5 and approximately 10.2 for the formulation are much higher, "-orna will be understood by those skilled in the art, the evaluation of lubrication performance depends on the drag coefficient, durability and time to reach the equilibrium time of μ.From Table 1, it can be seen that the pH decreases, the lubrication performance also decreases.The drag coefficient is reasonably consistent for the different pH selected with a slight increase that is observed at a pH of 9.5, although it decreases to a level corresponding to the lower pH when the pH it is increased over 9.5 It is understood, however, that, in the measurement of the drag coefficient, the slight increase in a pH of 9.5 can be a particular procedure with that composition and should not be construed as indicative of any special circumstances for the pH lubrication capacity value in 9.5. However, when considering the values for duration and time to react the equilibrium value of, Table 1 shows that the previous increase in lubrication performance with the pH decrease, although it is apparent that the composition of the higher pH still constitutes good lubricants.

EXAMPLE 4 In order to further evaluate the printing compatibility of the lubricant compositions of this invention, a second technique was attempted to test print compatibility. The revised method required a modification of the method defined in Example 3 to provide a more quantitative way of determining print compatibility. This was achieved by using the same aluminum beverage cans used in the previous method, filling them with water and placing them completely at a working concentration 10 times of the lubricant. The excess fluid is allowed to drip from the paper and then carefully wrapped around the hot can. The can was maintained at 65 ° C by placing it in an isolated box for a contact time of 45 minutes. The absorbent paper was allowed to air dry and was compared qualitatively against the control formulation. With the previous test method, the graduation of the aggressive nature of the lubricant to remove the printing pigment was evaluated in a similar manner. The results of the test also include the measurement of the drag coefficient that was attempted and summarized in the following table 2.

INCREASE OF pH INCREASE OF LUBRICANT EFFICIENCY ACCEPTABLE INK COMPATIBILITY From Table 2 above, it is apparent that the preferred compositions of the invention have a pH of 9.5 and 10.5 which has acceptable ink compatibility with very high durations and very acceptable coefficients of entrainment. From the results of Tables 1 and 2, it is apparent that a suitable lubricant, in accordance with the composition of this invention, can be provided with a pH preferably from 9 to 11 to produce an ink compatibility in accordance with the tests.

Claims (19)

1. NOVELTY OF THE INVENTION CLAIMS 1. - A concentrate of high pH that upon dilution with water forms a lubricant composition compatible with printing for use in the lubrication of a conveyor belt, said concentrate having a pH of 7 to 11 and comprising the following components: (a) (i) an alkylamine dicarboxylate compound of the general formula (I) (CHj). COO® !!! * (I) R, - M ^ ^ (CH2). COO®! ^ ® wherein R is a saturated or unsaturated alkyl group C? a Ciß, which includes mixtures of such alkyl groups, n is an integer from 1 to J2, preferably n is 2, and each of rA ± a, which may be the same or different, independently represent hydrogen or a group I metal typically sodium or potassium; and / or (ii) a compound of the general formula (II) CHJY, R, - C - N - CHj - CH - - N II I CH, 2Y (II) * 2 O Rj wherein Rx is an alkyl group of Ca to C < _ as defined above, Ra represents hydrogen a - (CHa.) ,. -OH where is an integer from 2 to 12, and each of Y and Y_. which may be the same or different, are independently selected from -CHa OH, -COO ^ M ^ 0 and -CH ^ CO ^ ^ K ^, where M ^ is hydrogen or a metal of group I, typically sodium or potassium; (b) a cyclic imidazalin of the general formula (III) N CHj C - R, CHjCHjOH wherein R3 is a saturated or unsaturated alkyl group of C ~ a Cao, with the proviso that the distribution of the alkyl chain lengths of group R of ring 1 is such that components (a) and (b) ) remain in solution; (c> an anionic saturated or unsaturated alkylsulfonate surfactant of Cia, and Clß, and (d) optionally a pH reducing agent to provide said pH in the range of 7 to 11. 2.- A concentrate of compliance with claim 1, further characterized in that the component (a) comprises a capro-amine dipropionate salt, or a mixture * - < of said coconut-amine diprapionate salt with a salt of oleylamine dipropionate. A concentrate according to claim 1 or 2, further characterized in that component (a) comprises a mixture of monasodia salts of oleylamine dipropionate and coco-amine dipropionate, preferably in a 1: 2 weight ratio of Oleylamine dipropionate: coco-amine dipropionate 4. A concentrate according to any of the preceding claims, further characterized in that the component (a) comprises a compound of the general formula (II) wherein R is an aleyl group. or o a coconut group, R-j. is a group -CHaCHaOH and Y and Y are as defined in claim 1. 5. A concentrate according to claim 4, further characterized in that the component (a) comprises a compound of the formula: CH2CH2COOüNaT (Coco) - C - N - CH2CH2.- N II I CH2CH2COO? Naf O CH2CHjOH 6. - A concentrate according to any of the preceding claims, further characterized in that the component (a) is used in an active amount from 0.4 to 18 3; by weight, based on the total weight of the concentrate, preferably from 3.8 to 13% by weight, based on the total weight of the concentrate. 7. A concentrate according to any of the preceding claims, further characterized in that the component (b) comprises a cyclic imidazoline of the general formula (III) in which R3 is a saturated or unsaturated alkyl group of C-, a Preferably an unsaturated alkyl group of Ci. 8. A concentrate according to any of the preceding claims, further characterized in that the cyclic imidazalin (b) is used in an active amount from 0.35 to 14 in peeo, based on the total weight of the concentrate, preferably from 3 to 10% in weight, based on the total weight of the concentrate. 26 9. - Concentrate according to any of the preceding claims, further characterized in that the anionic alkylsulfonate surfactant is an olefin sulfonate anionic surfactant 10. A concentrate according to any of the preceding claims, further characterized in that the anionic alkylsulfopate surfactant is present in an active amount from 0.2 to 5% by weight, based on the total weight of the concentrate, preferably from 0.2 to 1X by weight, based on the total weight of the concentrate. concentrated. 11. A concentrate according to any of the preceding claims, further characterized in that the weight ratio of component (a) to component (b) of the concentrate is 0.9-1.4: 1. 12. A concentrate according to any of the preceding claims, further characterized in that it comprises an additional component (e) comprising a nonionic surfactant which is a linear or branched alkoxylated alcohol or phenol a.lcs i latado, each having from 5 to 20 units of ethaxyl ion. 13. A concentrate according to claim J2, further characterized in that the component (e) comprises an alcohol ißa-C a a C1! S having 12 etching units. 14. A concentrate according to claim J2 or 13, further characterized in that the component (e) is present in an active amount from 0.5 tasta 10% by weight, preferably from 1 to 5% by weight, based on the total weight of the concentrate. 15. A concentrate according to any of the preceding claims, further characterized in that it has a pH of 9 to 11 and more preferably 10 to 11. 16. A concentrate according to any of the preceding claims, further characterized in that The pH reducing agent is a hydratropic acid. 17. A concentrate according to claim 16, further characterized in that hydrotropic acid diol is selected from the group consisting of caprylic acid and neodecanoic acid. 18. A lubricant composition for a conveyor belt comprising a concentrate in accordance with any of the preceding claims diluted with 80.00 to 99.99 parts by volume of water. 19. A lubricant composition according to claim 16, further characterized in that the concentrate is diluted with 99.0 to 99.9 parts by volume of water. SUMMARY OF THE INVENTION A concentrate with a high pH which at dilution with water forms a lubricant composition for use in the lubrication of conveyor belts, said concentrate having a pH of 7 to 11 comprises the following components: (a) (i) a dicarbax compound Alkylamine grade of the general formula (I), wherein R is a saturated or unsaturated alkyl group of CA to Cxß > , which includes mixtures of such alkyl groups, n is an "integer from 1 to 12, preferably n is 2 and each of Mx and Ma, which may be the same or different, independently represent hydrogen or a group to a group I metal , typically sodium or potassium, and with the proviso that the distribution of the alkyl chain lengths of the Rx group is such that the components (a) and (b) remain in solution, and / or (ii) a compound of the general formula (II), wherein Rx is an alkyl group of Cβ aa Cxß as defined above, Rx - represents hydrogen or - (CHa) m -OH where m is an integer from 2 to 12, and each of Y and Y.? which may be the same or different, are independently selected from -CHa OH, -C00 «=» M: s' = > and -CHaCD0 «=» MS9 '=, where ^ is hydrogen or a metal of group I, typically sodium or potassium; (b) a cyclic imidazalin of the general formula (III), wherein Ra is a saturated or unsaturated alkyl group of -, a Czo; and (c) an unsaturated saturated anionic acid anionic surfactant of C _> g. to Cxe_ and (d) optionally, a pH reducing agent to provide said uH in 1 at a scale of 7 to 11. (CHa) COO? Mlf R, - N (I) '(CH2). COOTMJ® CHjCKjOH RM / cgt * cpm * P96-393F