EP2344613B1 - Lubrifiant pour la lubrification à teneur réduite en eau de bandes transporteuses - Google Patents

Lubrifiant pour la lubrification à teneur réduite en eau de bandes transporteuses Download PDF

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Publication number
EP2344613B1
EP2344613B1 EP09764712.7A EP09764712A EP2344613B1 EP 2344613 B1 EP2344613 B1 EP 2344613B1 EP 09764712 A EP09764712 A EP 09764712A EP 2344613 B1 EP2344613 B1 EP 2344613B1
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EP
European Patent Office
Prior art keywords
lubricant
belt
water
lubrication
bottles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09764712.7A
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German (de)
English (en)
Other versions
EP2344613A1 (fr
Inventor
Udo Praeckel
Peter Bergdolt
Otmar Hien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tensid-Chemie GmbH
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Tensid-Chemie GmbH
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Filing date
Publication date
Application filed by Tensid-Chemie GmbH filed Critical Tensid-Chemie GmbH
Priority to PL09764712T priority Critical patent/PL2344613T3/pl
Publication of EP2344613A1 publication Critical patent/EP2344613A1/fr
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Publication of EP2344613B1 publication Critical patent/EP2344613B1/fr
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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
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • 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
    • 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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/01—Emulsions, colloids, or micelles
    • C10N2050/011—Oil-in-water

Definitions

  • the invention relates to a chain lubricant or belt lubricant for water-reduced lubrication of conveyor belts for bottles, cans, other containers and boxes and the use of chain lubricant or tape lubricant for the water-reduced lubrication of such conveyor belts.
  • Belt lubricants also referred to as chain lubricants, are used to transport glass bottles or cans, including beverage cans, other containers and boxes on conveyor belts. More recently, plastic bottles, here preferably polyethylene terephthalate, known as so-called PET bottles, have also been transported on the conveyor belts to a greater extent.
  • the belt lubricants or chain lubricants should generally have emulsifying, cleansing and corrosion-inhibiting properties. In the field of the beverage industry, particularly high demands are placed on hygiene. In a bottling plant, the smooth bottle transport is of utmost importance. If faults occur here, this can cause the entire filling line to come to a standstill and thus high downtime costs.
  • Belt lubrication should ensure smooth operation of the equipment while minimizing wear on the transport system (s) and bottles. At the same time, this must not increase the operating costs excessively, but should be kept low. It is currently common to use tape lubricants in a high dilution with water.
  • the preparation of the belt lubricating solution takes place in the form of a volume-proportional metering of the belt lubricant into a water flow in a central metering unit. The solution is then passed to nozzles and sprayed from there as evenly as possible.
  • the conveyor belts themselves can be made of steel or plastic. Basically, bottles made of glass or plastic, cans, boxes, barrels and cartons can be transported.
  • a fundamental problem in the transport systems are deposits in the piping systems, nozzle sticks, nozzles and sieves.
  • a disturbing foaming and streaks can be observed when using the belt lubricant in the high water dilution.
  • a particular problem is the cost of the significant amounts of fresh water supply and sanitation, which inevitably arise due to the high dilution of these conventional belt lubricant in the wet belt lubrication.
  • Dry-belt lubricants essentially do not require water, and therefore can be used without the problem of disruptive foaming and, moreover, irrespective of the hardness of the water.
  • a lubricant composition to be used as a "dry" lubricant.
  • This composition is characterized by having an oil selected from silicone oils, vegetable oils, and / or mineral oils dispersed in an aqueous phase. It can be used to lubricate the surface of a conveyor belt used to transport glass, plastic or cardboard containers.
  • the conveyor belts may be formed of a plastic material, such as polyacetal or polyamide.
  • the lubricant composition with certain types of containers should also be usable on steel and thus metal sheets. Although nothing more is said about the nature of the container, it is well known in the art that a dry belt lubrication is still not satisfactory for transporting glass bottles to metal webs.
  • silicone oils used the use of polydimethylsiloxanes having viscosities in the range of 1,000 to 30,000 mPas (cSt) is said to be suitable. In the embodiments, a silicone oil having a viscosity of 2,000 cSt is used.
  • the WO 2008/121720 deals in a very fundamental way with the problem of belt lubrication based on oil emulsions in aqueous phase.
  • the oil emulsion is produced as a macroemulsion. It can be both an oil-in-water emulsion and a water-in-oil emulsion.
  • all natural and / or synthetic oils are suitable for such an emulsion.
  • natural oils these include, for example, animal oils, vegetable oils, mineral oils, petroleum oils are named extra, and oils derived from coal or oil shale.
  • Synthetic oils may be those synthesized from raw materials which form blocks of larger and / or smaller molecules when reacted together, and then liquids in a temperature range of about 0-50 ° C form.
  • a wide range of possible oils from a variety of organic chemistry fields covered by this definition will then be enumerated.
  • the group of silicones in a wide viscosity range of 1 cSt - 10000cSt at 25 ° C is called and mentioned as such a possible lubricant dimethylsiloxanes. Can be added to this oil emulsion auxiliaries.
  • EDTA is usually present as ethylenediaminetetraacetic acid disodium salt.
  • the ethylenediaminetetraacetic acid anion has a molecular weight of about 292.
  • a method for lubrication between containers and a conveyor belt has become known, which refers specifically to the promotion of thermoplastic containers in the form of PET containers or bottles and here to solve the problem of stress cracks in particular the use of a silicone oil having a viscosity of less than 50 cSt, most preferably less than 5 cSt.
  • the US 2007/0066497 A1 also discloses a method for lubricating conveyor belts wherein a water miscible silicone compound is used as the silicone emulsion and the lubricant composition is applied to the conveyor belt or to the contact surface of the container to be transported with the conveyor belt.
  • the contact angle between the belt lubricant and the container should be less than 60 °.
  • Suitable silicone emulsions are those which have a viscosity of 430 cSt, but also those whose viscosity is in the range of 75,000-200,000 cSt.
  • the present invention therefore has for its object to provide a lubricant composition which is also and in particular suitable for the transport of glass bottles on metal webs, and which avoids the enormous water consumption of Najibandschmierung without requiring a costly plant conversion.
  • a chain lubricant or belt lubricant for a water-reduced lubrication of conveyor belts for Bottles, cans, other containers and boxes with a silicone oil having a viscosity of 70-200 cSt, at room temperature, with a multifunctional amine and with at least one excipient selected from the group consisting of anionic, nonionic, cationic and / or amphoteric surfactants as an aqueous phase emulsion wherein the amine is selected from amine salts in which the cation comprises primary, secondary, tertiary and / or quaternary amines, the anion as an organic radical is a surfactant, having a molecular weight greater than 350, preferably greater than 400, and the chain lubricant or belt lubricant is 5-95% by weight of aqueous phase, 0.01-30% by weight of silicone oil, 0.01-40% by weight of multifunctional amine and 0.01-25 Wt .-% surfact
  • the percentage by weight of the surfactant may also coincide with that of the amine compound when the organic radical is a surfactant as an anion of the amine salt.
  • a multifunctional nitrogen compound is understood as meaning such a nitrogen compound in which more than two functional groups are present in the entire molecule.
  • This multifunctional nitrogen compound forms the cation of the tape lubricant of the invention or is contained therein.
  • the multifunctional amine as a cation of this salt may in principle be a primary, secondary, tertiary and / or quaternary amine.
  • amine salts based on fatty acids such as those having lauryl, myristyl, cetyl and stearyl radicals mentioned.
  • fatty amines are mentioned, such as the alkylpropylenediamines, alkylpropylenetriamines and other alkylpropylenepolyamines.
  • an anion of this amine salt which itself has no amine or an amine compound, is an organic radical having a molecular weight of greater than 350, preferably greater than 400, and particularly preferably greater than 500.
  • Experimental results have shown that the high molecular weight anion the lubricity positive affected. It has also been found that the particular lubricating effect of the inventive chain lubricant or belt lubricant results from a synergistic interaction of the multifunctional nitrogen compound in the form of the amine salt with the silicone oil.
  • anionic surfactants generally include alkylbenzenesulfonates (ABS) and fatty alcohol sulfates, as well as secondary alkanesulfonates (SAS). With regard to ABS and SAS their property is to be mentioned, even with hard water to be used easily. In addition, these surfactants are characterized by good wetting properties.
  • at least one of the surfactant contained in the belt lubricant may be the organic radical as an anion of the amine salt itself.
  • nonionic surfactants of which in particular the polyalkylene glycol ethers or fatty alcohol ethoxylates, the fatty alcohol propoxylates and the alkylphenol ethoxylates may be mentioned by way of example.
  • auxiliaries optionally the addition of a weak acid in a small amount as a solubilizer, a fragrance and / or possibly also a dye and preservatives in question.
  • the inventive chain lubricant or belt lubricant is characterized by a very good material compatibility, also with respect to the usual printing inks on cardboard packaging, low foaming and independent of the water hardness present in each case. It is characterized in particular by excellent transport properties of glass bottles on metal chains.
  • a particular advantage of the chain lubricant or belt lubricant according to the invention consists in a considerable proportion of the conventional Wet belt lubrication usually used and required amount of water to save. Ideally, the water savings are 70-85 vol.%, With 85-95 vol.% Being even more preferred. Depending on the type of plant, a point of water savings of about 85% by volume or slightly above will reach a point where the metering equipment used in the field of wet-belt lubrication can no longer be readily used so that equipment conversion is required. This is partly due to the high pressure with which the belt lubricant in the dry belt lubrication must be applied to the conveyor system to ensure a sufficient amount of belt lubricant or chain lubricant on the conveyor belt.
  • the silicone oil may, according to a preferred embodiment, be selected from polyalkyl, polyaryl and / or polyalkyl / polyarylsiloxanes and mixtures thereof.
  • polydimethylsiloxane is known as the best-known and also suitable polysiloxane with respect to the polyalkylsiloxanes as the linear polysiloxane.
  • the polyaryl siloxanes the diphenylsiloxane and furthermore, in particular in the area of the polyalkyl / polyaryl siloxanes, the phenylmethyl siloxanes are to be emphasized as suitable.
  • amino-functional silicone oils are to be mentioned.
  • the silicone oil used in the lubricants may have a viscosity of 180-80 cSt. preferably 120-90 cSt., Each at room temperature, have.
  • silicone oils having a low viscosity have been found to be particularly suitable for use in belt lubrication because it is known that the siloxanes are more volatile with decreasing viscosity.
  • Silicone oils with a viscosity of 50 and less cSt have accordingly proved difficult to handle in their own experiments.
  • a silicone oil having a viscosity in the range of about 100 cSt has proven particularly useful.
  • the chain lubricant or belt lubricant according to the invention preferably has a pH of between 6 and 8.5, preferably a pH of between 6.5 and 8.0.
  • the invention also relates to the use of the chain lubricant or belt lubricant described in various embodiments for the water-reduced lubrication of conveyor belts for bottles, cans, other containers and boxes in the beverage and food processing industry, the cosmetic and pharmaceutical industries.
  • the bottles, cans, other containers and boxes may have any material selected from glass, plastic, cardboard or metal. It is particularly possible and therefore worth mentioning that the conveyor belt may be formed of metal and the contact with the container material glass is smooth, especially without particularly observed material abrasion of the conveyor belt.
  • the lubricant composition was prepared as an emulsion, and amounts are by weight unless otherwise specified.
  • the products WEICO® COR and STERONAL-GR are used, which are commercially available from Tensid-Chemie GmbH in Muggensturm, Germany. With them, a silicone oil in the form of a polydimethylsiloxane, a nitrogen-containing compound based on alkylamine salts, which is used as a corrosion inhibitor, and a surfactant used as an emulsifier.
  • a small amount of organic acid is included to adjust the pH.
  • z. B. also acetic acid are added to the pH adjustment.
  • the pH of the emulsion thus obtained was adjusted to about 7.6.
  • the viscosity was in the range of about 100 cSt.
  • the emulsion was prepared and used in a mixing ratio of STERONAL-GR to WEICO® COR of 80:20, each in aqueous phase.
  • the emulsion obtained according to Example 1 was used in this test run as a 3% dilution in water for the water-reduced belt lubrication of metal strips, which should serve for the transport of glass bottles.
  • the emulsion was applied to the conveyor belts of metal, in this case of stainless steel, by spraying together with an additional water content of 15% by volume.
  • reference value (100%) for the additional water fraction thus used the amount of water usually used in conventional wet-tape lubrication is used here, as in the following.
  • any other method of application which is well known per se such as e.g. the brushing.
  • the conveyor systems have automatic applicators.
  • the application of the belt lubricant according to the invention was carried out at intervals, wherein an order in this experiment took about 3 seconds and then about 20 minutes. was paused. Only then did a new order take place. This is a difference to wet belt lubrication, which can also be continuous.
  • the emulsion obtained according to Example 1 was used in this test run as a 7% dilution in water for metal belts for transporting glass bottles.
  • the emulsion was again applied by spraying together with an additional water content of 20% by volume.
  • the conveyor was designed for the passage of about 80,000 bottles per hour. Approximately 8 to 15 ml of the prepared emulsion were used in each case for lubricating the conveyor belts.
  • the application of the tape lubricant of the invention was carried out at intervals of 10 seconds, wherein after application for about 20 min. was paused. Only then did a new order take place.
  • the emulsion obtained according to Example 1 was used in this test run as a 5% dilution in water for the water-reduced belt lubrication of plastic tapes, which should be used to transport 0.5 l PET bottles.
  • the emulsion was applied to the conveyor belts by spraying together with an additional 15% by volume water content.
  • the stress corrosion cracking was based on the work instructions CC (so-called Coca-Cola standard): Additives-Line Simulation; Version 1.0 of 15.10.98 determined. Table 1 shows that essentially no stress corrosion cracking could be detected. ⁇ b> Table 1: Testing for compatibility with CC reusable PET bottles ⁇ / b> No. Floor space (floor) Radial Base (wall) leak 0 A B C D 0 A B C D Yes No Ref. X X X Ref.
  • the conventional wet-belt lubrication could be compared with the water-reduced belt lubrication according to the invention.
  • the emulsion obtained according to Example 1 was used in this test run as a 2.5% dilution in water. It was tested on metal bands to transport glass bottles in a brewery. The plant had 53 and 190 nozzles, with a throughput of 9,500 and 30,000 bottles per hour. The emulsion was applied again by spraying.

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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)

Claims (7)

  1. Lubrifiant pour chaînes ou pour bandes pour une lubrification à teneur réduite en eau de bandes transporteuses de bouteilles, canettes, autres récipients et boîtes, avec une huile de silicone qui présente une viscosité de 700 à 200 cSt à température ambiante, avec une amine multifonctionnelle et au moins une matière auxiliaire, choisie dans le groupe constitué par les agents tensioactifs anioniques, non ioniques, cationiques et/ou amphotères, sous la forme d'une émulsion en phase aqueuse, l'amine étant choisie parmi les sels d'amine dans lesquels le cation comprend des amines primaires, secondaires, tertiaires et/ou quaternaires, l'anion étant, en tant que reste organique, un agent tensioactif ayant une masse moléculaire supérieure à 350, de préférence supérieure à 400, et le lubrifiant pour chaînes ou pour bandes présentant
    - 10 à 95 % en poids de phase aqueuse,
    - 0,01 à 30 % en poids d'huile de silicone,
    - 0,01 à 40 % en poids d'amine multifonctionelle et
    - 0,01 à 25 % en poids d'agent tensioactif.
  2. Lubrifiant pour chaînes ou pour bandes selon la revendication 1, caractérisé en ce que l'huile de silicone est choisie parmi les polyalkyl-, polyaryl- et/ou polyalkyl-/polyarylsiloxanes ainsi que des mélanges de ceux-ci.
  3. Lubrifiant pour chaînes ou pour bandes selon la revendication 2, caractérisé en ce que l'huile de silicone est choisie parmi les polydiméthylsiloxanes.
  4. Lubrifiant pour chaînes ou pour bandes selon l'une des revendications 1 à 3, caractérisé en ce que l'huile de silicone présente une viscosité de 180 à 80 cSt, de préférence de 120 à 90 cSt, à température ambiante.
  5. Utilisation du lubrifiant pour chaînes ou pour bandes selon l'une des revendications 1 à 4 pour la lubrification à teneur réduite en eau de bandes transporteuses de bouteilles, canettes, autres récipients et boîtes dans l'industrie de transformation des boissons et des produits alimentaires, l'industrie cosmétique et pharmaceutique.
  6. Utilisation selon la revendication 5 pour la lubrification de bandes transporteuses de bouteilles, canettes, autres récipients et boîtes en verre, matière plastique, carton ou métal.
  7. Utilisation selon la revendication 5 ou 6 pour la lubrification de bandes transporteuses en métal ou matière plastique.
EP09764712.7A 2008-11-07 2009-11-09 Lubrifiant pour la lubrification à teneur réduite en eau de bandes transporteuses Active EP2344613B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09764712T PL2344613T3 (pl) 2008-11-07 2009-11-09 Środek smarny do smarowania taśm przy zredukowanej ilości wody

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008056440A DE102008056440A1 (de) 2008-11-07 2008-11-07 Schmiermittel für die wasserreduzierte Bandschmierung
PCT/EP2009/007994 WO2010052018A1 (fr) 2008-11-07 2009-11-09 Lubrifiant pour la lubrification à teneur réduite en eau de bandes transporteuses

Publications (2)

Publication Number Publication Date
EP2344613A1 EP2344613A1 (fr) 2011-07-20
EP2344613B1 true EP2344613B1 (fr) 2017-01-04

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EP09764712.7A Active EP2344613B1 (fr) 2008-11-07 2009-11-09 Lubrifiant pour la lubrification à teneur réduite en eau de bandes transporteuses

Country Status (10)

Country Link
US (1) US20110269653A1 (fr)
EP (1) EP2344613B1 (fr)
BR (1) BRPI0921344A2 (fr)
CL (1) CL2011001029A1 (fr)
DE (1) DE102008056440A1 (fr)
EC (1) ECSP11011037A (fr)
MX (1) MX2011004926A (fr)
PL (1) PL2344613T3 (fr)
RU (1) RU2605750C2 (fr)
WO (1) WO2010052018A1 (fr)

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US7741257B2 (en) 2005-03-15 2010-06-22 Ecolab Inc. Dry lubricant for conveying containers
US7745381B2 (en) 2005-03-15 2010-06-29 Ecolab Inc. Lubricant for conveying containers
ES2776135T3 (es) 2010-09-24 2020-07-29 Ecolab Usa Inc Método para lubricar un transportador
CN102618373B (zh) * 2012-03-08 2013-10-16 柳州市恒一环保科技有限公司 自行车链条无油润滑剂及其制作方法
EP2969864B1 (fr) 2013-03-11 2024-04-24 Ecolab USA Inc. Lubrification de plaques de transfert utilisant une huile ou des émulsions d'huile dans l'eau
RU2537294C1 (ru) * 2013-12-24 2014-12-27 Общество с Ограниченной Ответственностью Научно-Производственное Предприятие "Альфа-Сервис" (ООО НПП "Альфа-Сервис") Водорастворимый смазочный состав для обработки конвейерных лент

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US4420578A (en) * 1980-11-10 1983-12-13 Diversey Corporation Surface treatment of glass containers
SU1498786A1 (ru) * 1987-03-30 1989-08-07 Восточный научно-исследовательский горнорудный институт Смазочна композици дл движущейс по желобу ленты в безроликовых конвейерах
DK1842898T3 (da) 1999-07-22 2012-08-13 Diversey Inc Anvendelse af en smøremiddelsammensætning til at smøre et transportbælte
US6495494B1 (en) * 2000-06-16 2002-12-17 Ecolab Inc. Conveyor lubricant and method for transporting articles on a conveyor system
US7384895B2 (en) * 1999-08-16 2008-06-10 Ecolab Inc. Conveyor lubricant, passivation of a thermoplastic container to stress cracking and thermoplastic stress crack inhibitor
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US6509302B2 (en) * 2000-12-20 2003-01-21 Ecolab Inc. Stable dispersion of liquid hydrophilic and oleophilic phases in a conveyor lubricant
US7741257B2 (en) * 2005-03-15 2010-06-22 Ecolab Inc. Dry lubricant for conveying containers
US7745381B2 (en) * 2005-03-15 2010-06-29 Ecolab Inc. Lubricant for conveying containers
US7915206B2 (en) * 2005-09-22 2011-03-29 Ecolab Silicone lubricant with good wetting on PET surfaces
US7741255B2 (en) 2006-06-23 2010-06-22 Ecolab Inc. Aqueous compositions useful in filling and conveying of beverage bottles wherein the compositions comprise hardness ions and have improved compatibility with pet
EP1932901A1 (fr) * 2006-12-12 2008-06-18 JohnsonDiversey, Inc. Procédé de lubrification d'un convoyeur
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Also Published As

Publication number Publication date
MX2011004926A (es) 2011-09-06
ECSP11011037A (es) 2011-08-31
CL2011001029A1 (es) 2011-10-07
RU2605750C2 (ru) 2016-12-27
WO2010052018A1 (fr) 2010-05-14
EP2344613A1 (fr) 2011-07-20
US20110269653A1 (en) 2011-11-03
BRPI0921344A2 (pt) 2015-12-29
RU2011119926A (ru) 2012-12-20
PL2344613T3 (pl) 2017-07-31
DE102008056440A1 (de) 2010-05-20

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