Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
  • C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M173/00—Lubricating compositions containing more than 10% water
  • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
  • C10M173/025—Lubricating compositions containing more than 10% water not containing mineral or fatty oils for lubricating conveyor belts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/02—Hydroxy compounds
  • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
  • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
  • C10M2207/124—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms containing hydroxy groups; Ethers thereof
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
  • C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/10—Carboxylix acids; Neutral salts thereof
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
  • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/108—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/042—Metal salts thereof
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/043—Ammonium or amine salts thereof
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2010/00—Metal present as such or in compounds
  • C10N2010/02—Groups 1 or 11
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/38—Conveyors or chain belts

Definitions

• the present invention refers to a method for lubricating conveyor systems consisting of applying a lubricant composition wherein the active matter concentration of said lubricant composition ranges from 1 to 99% by weight.
• Said method is particularly preferred in conveyor systems for glass bottles, plastic bottles such as polyethylene terephtalate (PET) or polycarbonate (PC) bottles, cans, glass containers and cartons containers and similar items.
• PET polyethylene terephtalate
• PC polycarbonate
• Said conveyor systems can particularly be found in the foodstuff industry.
• articulated plate conveyor belts or other transport systems are used. Said systems are maintained lubricated to reduce the mechanical strength of the bottles and containers, and cleaned to remove dirt and to avoid contamination by micro-organisms, with the aid of appropriate aqueous lubricating agents, preferentially applied with automatic lubrication systems for conveyor belts or other transport systems, equipped with a sprayer system.
• a lubricant concentrated composition is diluted with water to form a lubricant diluted composition (i.e., dilution factors of 2 to 10000, preferably 5 to 1000 by volume), and copious amounts of lubricant diluted compositions are typically applied to the conveyor systems or containers using spray or pumping equipment on a continuous basis.
• the lubricant diluted composition can be collected in drip trays, which discharge into drainage systems and then to the effluent plant for disposals.
• “Dry lubricants” have been described as a solution to the disadvantages of the diluted lubricant compositions.
• a "dry lubricant” historically has referred to a lubricant composition with low water content, preferably less than 50 wt.%, which was applied to a container or conveyor system without dilution.
• this application typically required special dispensing equipment and nozzles and energized nozzles in particular.
• Energized nozzles refer to nozzles where the lubricant stream is broken into a spray of fine droplets by the use of energy, which may include high pressures, compressed air, or sonication to deliver the lubricant.
• Dry lubricants based on silicone materials and/or polymers are very common.
• silicone is primarily effective at lubricating plastics such as PET bottles, and has been observed to be less effective at lubricating on glass or metal containers, particularly on a metal surface. If a plant is running more than one type of container on a line, the conveyor lubricant will have to be switched before the new type of container can be run. Alternatively, if a plant is running different types of containers on different lines, the plant will have to stock more than one type of conveyor lubricant. Both scenarios are time consuming and inefficient for the plant.
• silicone materials and certain polymers are not biodegradable and may contaminate the effluents.
• Said International patent application describes both concentrated and diluted lubricant compositions, which are obtained by diluting the previous lubricant concentrated compositions. Furthermore, said European patent application also describes a method for lubricating conveyor systems consisting in applying a lubricant diluted composition (0.03% by weight) obtained by diluting the lubricant concentrated composition described above to a conveyor system. The use of the lubricant diluted composition for lubricating conveyor systems is also described.
• Said dilution can be carried out either directly in one step or through intermediate partially diluted compositions, i.e. starting from a concentrate, diluting it by a factor of 2 to 100, and finally diluting it again to the desirable final concentration. This procedure is commonly used to avoid transport and storage of highly diluted compositions.
• the lubricant compositions described in the International patent application PCT/EP2007/002772 if applied directly or in the form of partially diluted compositions, wherein the active matter concentration of the lubricant composition ranging from 1 to 99% by weight, to conveyor systems, not only provide appropriate lubricant properties, but also provide an efficient solution to the problems mentioned before: said composition can be applied without further dilution with standard application equipments (i.e. non-energized nozzles) resulting in drier lubrication of the conveyor systems and drier conveyor line and working area, reduced lubricant usage, reduced waste, cleanup and disposal problems, and avoiding dilution problems.
• standard application equipments i.e. non-energized nozzles
• said lubricant compositions have a better ecotoxicological profile than existing concentrated (dry) lubricant compositions based on silicone materials and/or polymers.
• the present invention provides a method for lubricating conveyor systems consisting of applying, continuously or at intervals, a lubricant composition comprising the following essential elements,
• the present invention also provides the use of the lubricant composition defined above for lubricating conveyor systems.
• the phosphoric acid esters of formula (I) may be prepared by reacting in aqueous media C 6 -C 22 fatty alcohols with phosphorous pentoxide (P 2 O 5 ).
• the C 6 -C 22 fatty alcohols are preferably derived from natural fat and oil as well as synthetic origin.
• Preferred fats and oils include palm oil, coconut oil, sunflower oil, rapeseed oil, castor oil, olive oil, soybean oil; and animal fat such as tallow, bone oil; fish oil, hardened oils and semihardened oils thereof; and mixtures thereof.
• the C 6 -C 22 fatty alcohols that react with the phosphorous pentoxide (P 2 O 5 ) may contain a great variety of alkyl and/or alkenyl groups, said groups being linear or branched, saturated or unsaturated.
• C 6 -C 22 fatty alcohols are derived from coconut oil, palm oil and olive oil. It is particularly preferred that the C 6 -C 22 fatty alcohols to be reacted with the phosphoric acid esters are derived from olive oil.
• the phosphoric acid esters obtained by reacting in C 6 -C 22 fatty alcohols with phosphorous pentoxide (P 2 O 5 ) are a mixture of phosphoric mono-esters (mono-alkyl esters) and phosphoric di-esters (di-alkyl esters) and the products obtained and the reaction are well known to the skilled person (O'Lenick et al., Soap Cosmetics and Chemical Specialities, July 1986, p. 26.)
• the weight ratio phosphoric mono-esters to phosphoric di-esters is from 50:50 to 95:5, more preferred from 55:45 to 90:10.
• Z represents hydrogen or an appropriate cation, said cation preferably being selected from the group consisting of an alkali metal, an alkaline earth metal, ammonium, an alkylammonium, an alkanolammonium or a glucammonium. It is further preferred that Z represents hydrogen or an alkali metal, preferably lithium, sodium or potassium.
• the C 16 -C 18 proportion in the alkyl and/or alkenyl groups of the phosphoric acid esters is higher than 70%, preferably higher than 80%, even more preferably higher than 85%.
• the C 6 -C 22 fatty alcohols are ethoxylated, having an average ethoxylation degree from 1 to 10, preferably from 2 to 8.
• Examples of commercially available phosphoric acid esters are FOSFODET ® 20 M (potassium salt of phosphoric ester of lauric alcohol, mono-ester to di-ester ratio 80:20); FOSFODET ® 20 D (potassium salt of phosphoric ester of lauric alcohol, mono-ester to di-ester ratio 50:50), FOSFODET ® 8050 (phosphoric ester of hydrogenated tallow, mono-ester to di-ester ratio 60:40), FOSFODET ® FJZ 903 (phosphoric ester of ethoxylated (3 EO) oleyl alcohol, mono-ester to di-ester ratio 55:45), all marketed by KAO Chemicals Europe.
• FOSFODET ® 20 M potassium salt of phosphoric ester of lauric alcohol, mono-ester to di-ester ratio 80:20
• FOSFODET ® 20 D potassium salt of phosphoric ester of lauric alcohol, mono-ester to di-est
• Ether carboxylates of formula (II) are products well known in the art. They are usually obtained by alkoxylation and subsequent carboxymethylation of fatty alcohols as described by Meijer and Smid in Polyether Carboxylates; Anionic Surfactants; Surfactant Sciencie Series, Vol. 56 (p. 313-361), edited by Helmut W. Stache, ISBN: 0-8247-9394-3 .
• the process is divided into two steps.
• the first one is the alkoxylation of alcohols under standard conditions known by the skilled in the art.
• the polyoxyethylene group is obtained by addition of ethylene oxide to fatty alcohols, mostly with an alkaline catalyst such as NaOH, KOH or NaOCH 3 , giving a broad polyoxyethylene oxide distribution (broad ethoxylation degree).
• an alkaline catalyst such as NaOH, KOH or NaOCH 3
• the ethoxylation can be catalyzed by Lewis acids or by using metallic Na or NaH to achieve a narrow range distribution (narrow ethoxylation degree).
• the ethoxylated alcohols are reacted with a strong base, like sodium or potassium hydroxide, in presence of a reducing agent, i.e. sodium borohydride, to obtain the corresponding alkoxylate, which is carboxymethylated with sodium monochloroacetate (SMCA).
• a strong base like sodium or potassium hydroxide
• a reducing agent i.e. sodium borohydride
• the ether carboxylates of formula (II) are derived from C 6 -C 22 fatty alcohols, which are preferably derived from natural fat and oil as well as synthetic origin.
• Preferred fats and oils include palm oil, coconut oil, sunflower oil, rapeseed oil, castor oil, olive oil, soybean oil; and animal fat such as tallow, bone oil; fish oil, hardened oils and semihardened oils thereof; and mixtures thereof.
• the C 6 -C 22 fatty alcohols that are alkoxylated and subsequently carboxymethylated may contain a great variety of alkyl and/or alkenyl groups, said groups being linear or branched, saturated or unsaturated.
• C 6 -C 22 fatty alcohols are derived from coconut oil, palm oil and olive oil. It is particularly preferred that the C 6 -C 22 fatty alcohols that are alkoxylated and subsequently carboxymethylated are derived from olive oil.
• n has a value in the range of 1 to 10, preferably in the range of 1 to 7, and M is hydrogen, sodium or potassium.
• the C 16 -C 18 proportion is higher than 80%, more preferred higher than 80%, even more preferred higher than 85%.
• ether carboxylates of formula (II) are AKYPO ® RO 10 VG (Oleic ether carboxylic acid with an average ethoxylation degree of 1), AKYPO ® RO 20 VG (Oleic ether carboxylic acid with an average ethoxylation degree of 2), AKYPO ® RO 50 VG (Oleic ether carboxylic acid with an average ethoxylation degree of 5), and AKYPO ® RO 90 VG (Oleic ether carboxylic acid with an average ethoxylation degree of 9), all marketed by KAO Chemicals Europe.
• the C 6 -C 22 fatty acids can be selected from natural and/or synthetic origin. Accordingly, natural fatty acids may also be used in addition to synthetic fatty acids. The natural acids do not normally occur in pure form and are therefore preferably used for the purposes of the invention in the form of mixtures, which may be obtained from a variety of natural sources.
• the fatty acids are preferably selected from hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, 9-hexadecenoic acid, 9,12-octadecadienoic acid, 9,12,15-octadecatrienoic acid, 5,8,11,14-eicosatetraenoic acid, 4,8,12,15,19-docosapentaenoic acid, sperm oil acid, coconut oil acid, oleic acid, tall oil acid, sunflower oil acid, linseed oil acid, and/or rapeseed oil acid.
• the C 6 -C 22 fatty acids are optionally ethoxylated with 1 to 20 moles of ethylene oxide, preferably with 1 to 10 moles of ethylene oxide.
• the C 16 -C 18 proportion in the fatty acids according to the invention is higher than 70%, preferably higher than 80%, even more preferably higher than 85%.
• Fatty alcohols are aliphatic alcohols derived from natural fats and oils. Due to their amphipathic nature, fatty alcohols behave as nonionic surfactants. They find use as emulsifiers, emollients and thickeners in cosmetics and food industry.
• Fatty alcohols are a common component of waxes, mostly as esters with fatty acids but also as alcohols themselves.
• C 6 -C 22 fatty alcohols include capryl alcohol (1-octanol), pelargonic alcohol (1-nonanol), capric alcohol (1-decanol), lauryl alcohol (1-dodecanol), myristyl alcohol (1-tetradecanol), cetyl alcohol (1-hexadecanol), palmitoleyl alcohol (cis-9-hexadecan-1-ol), stearyl alcohol (1-octadecanol), isostearyl alcohol (16-methylheptadecan-1-ol), elaidyl alcohol (9E-octadecen-1-ol), oleyl alcohol (cis-9-octadecen-1-ol), linoleyl alcohol (9Z, 12Z-octadecadien-1-ol), elaidolinoleyl alcohol (9E, 12E-octadecadien-1-ol), linolenyl alcohol (9Z,
• the C 6 -C 22 fatty alcohols are optionally ethoxylated with 1 to 20 moles of ethylene oxide, preferably with 1 to 10 moles of ethylene oxide.
• the C 16 -C 18 proportion in the fatty alcohols according to the invention is higher than 70%, preferably higher than 80%, even more preferably higher than 85%.
• the active matter content of the lubricant composition preferably ranges from 2 to 75% by weight, more preferably from 3 to 50% by weight, even more preferably from 4 to 25% by weight.
• the active matter of the lubricant composition is substantially provided by components (a), (b), (c) and (d).
• the lubricant composition can be applied directly or in the form of partially diluted compositions.
• Said partially diluted compositions can be obtained by diluting a lubricant concentrated composition as described in the International patent application PCT/EP2007/002772 or, alternatively, can be prepared in situ, depending on its active matter content. Dilution from a lubricant concentrated composition is preferred to avoid transport and storage of diluted compositions.
• Dilution of the lubricant concentrated composition to obtain the lubricant partially diluted composition can be done with an appropriate inert solvent or mixture thereof.
• inert solvents examples include mineral oils, paraffin and waxes derived from petroleum, animal and vegetable oils (like beef tallow, lard, horse grease, yolk oil, olive oil, lanolin, jojoba oil, rapeseed oil and soybean oil), natural waxes (like carnauba wax), C 1 -C 6 alcohols (like methanol, ethanol, n-propanol, i-propanol, n-butanol, n-pentanol or n-hexanol), C 6 -C 22 fatty alcohols as described before, C 6 -C 22 fatty acids as described before, ether carboxylates as described before, water (hard water, semi-hard water or soft water), or polyols (polyhydric alcohol having two or more hydroxyl groups in its molecule) like ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, dipropy
• the weight ratio of component (a) (phosphoric acid esters) to component (b) (ether carboxylates) is in the range of 9:1 to 1:6, preferably in the range of 5:1 to 1:5, more preferably in the range of 3:1 to 1:3.
• the ether carboxylates of formula (II) are a mixture of
• the weight ratio of the C 12 -C 18 alkyl and/or alkenyl ether carboxylates to the C 6 -C 10 alkyl and/or alkenyl ether carboxylates in the lubricant composition is in the range of 10:1 to 1:5, preferably in the range of 8:1 to 1:3.
• the subject matter of the present invention also refers to a method for lubricating conveyor systems consisting of applying, continuously or at intervals, a lubricant composition comprising the following essential elements, expressed as weight percentage,
• the subject matter of the present invention also refers to a method for lubricating conveyor systems consisting of applying, continuously or at intervals, a lubricant composition comprising the following essential elements, expressed as weight percentage,
• the subject matter of the present invention also refers to a method for lubricating conveyor systems consisting of applying, continuously or at intervals, a lubricant composition comprising the following essential elements, expressed as weight percentage,
• the lubricant composition can be applied to the conveyor systems continuously or at intervals (intermittently). According to the invention, intermittent application of the lubricant composition is preferred because of the reduced lubricant usage.
• the ratio to application time to non-application time may be from 3:1 to 1:500, depending if the lubricant composition maintains an appropriate coefficient of friction in between lubricant applications.
• the lubricant composition may be applied for a period of time and then not applied for at least 15 minutes, at least 30 minutes, or at least 45 minutes or longer. The application period may be long enough to spread the composition over the conveyor belt (i.e. one revolution of the conveyor belt).
• the lubricant composition is preferably applied to the conveyor surface at a location that is not populated by packages or containers. For example, it is preferable to apply the lubricant spray upstream of the package or container flow or on the inverted conveyor surface moving underneath and upstream of the container or package.
• lubricant composition can be carried out using any suitable technique including spraying, wiping, brushing, drip coating, roll coating, and other methods for application of a thin film.
• the subject matter of the present invention also includes the use of the lubricant composition defined above for lubricating conveyor systems.
• a variety of kinds of conveyors systems and conveyor parts can be lubricated with the lubricant composition.
• Parts of the conveyor that support or guide or move the containers and thus are preferably coated with the lubricant composition include belts, chains, gates, chutes, sensors, and ramps having surfaces made of fabrics, metals, plastics, composites, or combinations of these materials.
• the conveyor systems which can be lubricated by the process according to the invention, can be systems for a variety of materials including glasses; plastics (e.g., polyolefins such as polyethylene and polypropylene; polystyrenes; polyesters such as polyethylene terephtalate (PET) and polyethylene naphthalate (PEN); polyamides, polycarbonates (PC); and mixtures or copolymers thereof); metals (e.g., aluminum, tin or steel); papers (e.g., untreated, treated, waxed or other coated papers); cartons (like the commercially available Tetra Pack ® or SIG Combibloc ® containers); (ceramics; and laminates or composites of two or more of these materials (e.g., laminates of PET, PEN or mixtures thereof with another plastic material).
• plastics e.g., polyolefins such as polyethylene and polypropylene; polystyrenes; polyesters such as polyethylene terephtal
• the containers can have a variety of sizes and forms, including cartons (e.g., waxed cartons, Tetra Pack ® or SIG Combibloc ® containers), cans, bottles, drums and the like.
• cartons e.g., waxed cartons, Tetra Pack ® or SIG Combibloc ® containers
• the systems are suitable for glass bottles, plastic bottles such as polyethylene terephtalate (PET) or polycarbonate (PC) bottles, cans, glass containers and cartons containers (i.e. Tetra Pack ® or SIG Combibloc ® containers) and similar items.
• Said conveyor systems can particularly be found in the foodstuff industry.
• the lubricant composition can also contain additives such as ionic surfactants, non ionic surfactants, amphoteric surfactants, foam inhibitor agents, foam regulators, foam stabilizers, complexing agents, chelating agents, solubilizers, emulsifiers, biocides, bactericides, disinfectants, fungicides, antioxidants, corrosion inhibitors and pH regulators.
• additives such as ionic surfactants, non ionic surfactants, amphoteric surfactants, foam inhibitor agents, foam regulators, foam stabilizers, complexing agents, chelating agents, solubilizers, emulsifiers, biocides, bactericides, disinfectants, fungicides, antioxidants, corrosion inhibitors and pH regulators.
• the pH of the lubricant composition is preferably between 2.0 and 7.0, more preferably between 4.0 and 6.0.
• the viscosity of the lubricant composition ranges from 50 to 20,000 mPa ⁇ s at 20°C, more preferably from 100 to 10,000 mPa ⁇ s at 20°C.
• the lubricant partially diluted composition may contain solubilizing agents that can be mixed with water or that are water-soluble.
• solubilizers are used:
• the disinfectants that could be contained in the lubricant partially diluted composition for conveyor systems are, for example, those described in the " Gu ⁇ a de Plaguicidas utilizados en Higiene Alimentaria y Salud P ⁇ blica" published by the Spanish Health Ministry (ISBN: 84-7607-499-2 ). These disinfectants or mixtures thereof can be used in amounts of 5 to 50 parts by weight, relative to 100 parts by weight the total amount of the compounds a), b) c) and d).
• a preferred disinfectant agent according to the invention is chlorine dioxide (ClO 2 )
• the lubricant partially diluted compositions of Table 2 were prepared.
• the lubricant concentrated composition, which is diluted to obtain the lubricant partially diluted compositions of Table 2 is described in Table 1. The values are referred to weight percentage.
• Table 1. - Lubricant concentrated composition (components as active matter) Amount Polyoxyethylene (3) oleyl phosphate ester 1 29.5 Polyoxyethylene (2) oleyl ether carboxylic acid 2 27.6 Polyoxyethylene (5) oleyl ether carboxylic acid 3 3.4 Polyoxyethylene (8) capryl ether carboxylic acid 4 16.7 Oleic Acid 12.1 Oleyl alcohol 7.3 Deionized water 3.4 1 Phosphoric ester of ethoxylated (3 EO) oleyl alcohol, mono-ester to di-ester ratio 55:45 2 Oleic ether carboxylic acid with an average ethoxylation degree of 2 3 Oleic ether carboxylic acid with an average ethoxylation degree of 5 4 Caprylic ether carboxy
• composition Concentration 1 Concentrated composition of Table 1 10 wt.% dilution in water* 2 Concentrated composition of Table 1 10 wt.% dilution in oleyl alcohol 3 Concentrated composition of Table 1 10 wt.% dilution in mineral oil * tap water from Emmerich am Rhein (Germany), specifically of hardness 17°dH (German degrees) according to the regulation UNE-EN 12829
• the dynamic friction coefficient ( ⁇ ) is defined as the coefficient between the tensile force measured for a bottle or drinking can and the weight of this bottle or drinking can expressed in grams. This coefficient is determined when a constant value is obtained.
• compositions according to the invention present no foam formation or slightly foam formation.
• Table 3 shows the friction coefficients obtained for the lubricant compositions described in Table 2 of Example 1 as well as for comparative experiment (C1) Table 3.
• - Friction coefficients ( ⁇ ) Friction coefficients ( ⁇ ) Lubricant composition Glass bottles PET bottles Drinking cans Spraying 1 0.11 0.08 0.13 Continuous dosage over 60 min 2 0.11 0.08 0.11 Continuous dosage over 60 min 0.11 0.08 0.11 After 30 min drying time without further dosage 3 0.13 0.10 0.12 Continuous dosage over 60 min 0.13 0.10 0.11 After 30 min drying time without further dosage C1* 0.38 0.13 0.30 Continuous dosage over 60 min * Dry lubricant commercially available (Teflon in mineral oil)
• the friction coefficient obtained with the lubricant partially diluted compositions 2-5 was maintained stable for 30 minutes after said compositions were applied to the conveyor belt for the different type of recipients (glass bottles, PET bottles and drinking cans)

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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Citations (6)

• 2007
  • 2007-09-26 EP EP07018934A patent/EP2042587A1/fr not_active Withdrawn
• 2008
  • 2008-09-24 WO PCT/EP2008/062753 patent/WO2009040370A1/fr active Application Filing

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