EP2677022B1 - Machine cleaning of plastic parts - Google Patents

Machine cleaning of plastic parts Download PDF

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Publication number
EP2677022B1
EP2677022B1 EP12172503.0A EP12172503A EP2677022B1 EP 2677022 B1 EP2677022 B1 EP 2677022B1 EP 12172503 A EP12172503 A EP 12172503A EP 2677022 B1 EP2677022 B1 EP 2677022B1
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EP
European Patent Office
Prior art keywords
surfactant
rinse aid
weight
free rinse
plastic parts
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.)
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Application number
EP12172503.0A
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German (de)
French (fr)
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EP2677022A1 (en
Inventor
Petra Reessing
Matthias Springer
Ina Haacke
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.)
Chemische Fabrik Dr Weigert GmbH and Co
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Chemische Fabrik Dr Weigert GmbH and Co
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Publication date
Application filed by Chemische Fabrik Dr Weigert GmbH and Co filed Critical Chemische Fabrik Dr Weigert GmbH and Co
Priority to EP12172503.0A priority Critical patent/EP2677022B1/en
Priority to SI201230434T priority patent/SI2677022T1/en
Priority to HUE12172503A priority patent/HUE026648T2/en
Priority to ES12172503.0T priority patent/ES2556982T3/en
Priority to PT121725030T priority patent/PT2677022E/en
Priority to PL12172503T priority patent/PL2677022T3/en
Publication of EP2677022A1 publication Critical patent/EP2677022A1/en
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Publication of EP2677022B1 publication Critical patent/EP2677022B1/en
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3769—(Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines
    • C11D3/3773—(Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines in liquid compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3796—Amphoteric polymers or zwitterionic polymers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/18—Glass; Plastics

Definitions

  • the invention relates to the use of a rinse aid in the automated cleaning of plastic parts and a method for automated cleaning of plastic parts.
  • the mechanical cleaning of plastic parts is known from public prior use. Examples of articles which are either entirely or partly made of plastic and are usually cleaned by machine are found, inter alia, in the food sector (eg crockery), in the field of medical devices (eg surgical instruments) and in the laboratory sector (eg. experimental animal cages).
  • the stress of the plastic parts in the context of machine cleaning can lead to the formation of stress cracks in the plastic.
  • the stress cracking has a significantly reduced lifetime of the plastic parts result.
  • the invention is based on the object to improve the mechanical cleaning of plastic parts.
  • the invention is based on the surprising finding that a surfactant-free rinse aid containing at least one polymer which has cationic dissociable groups or a combination of cationic and anionic dissociable groups, on the one hand achieves a good drying action on plastic parts and on the other hand avoids or at least reduces stress cracking on these plastic parts.
  • plastic parts may be exposed in the context of machine cleaning, for example, in a hot-drying and / or in the course of any subsequent thermal sterilization.
  • machine cleaning refers to the automatic cleaning of objects, preferably in a dishwasher, wherein in the course of cleaning no human intervention is required.
  • dishwasher includes any known in the prior art dishwasher, which is suitable for cleaning plastic parts, in particular commercial or household dishwashers, and special dishwashers.
  • Machine cleaning of articles usually involves at least one cleaning step and one final rinse step.
  • cleaning solution is applied to the objects to release the adhering dirt.
  • the rinsing step serves to rinse off residues of the cleaning agent remaining from the objects, if necessary, and to improve the final drying process. Therefore, the final rinse step is generally the final step in the machine cleaning process in which the objects are rinsed with liquid.
  • rinse aid designates a composition which is used in the automatic cleaning of objects in dishwashers in order to improve the final drying process.
  • the rinse aid used according to the invention is surfactant-free, ie it contains no surfactants.
  • Surfactants are compounds which lower the interfacial tension, i. amphiphilic compounds having at least one hydrophobic and one hydrophilic moiety.
  • the term surfactants denotes the group consisting of anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants and block copolymers (in particular of ethylene oxide and propylene oxide units).
  • surfactants denotes the group consisting of anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants and block copolymers (in particular of ethylene oxide and propylene oxide units).
  • the rinse aid used according to the invention contains at least one polymer which has cationic dissociable groups or a combination of cationic and anionic dissociable groups.
  • polymers are called macromolecular compounds constructed from low molecular weight monomer units. For example, reference is made Rƶmpp Chemielexikon, 10th edition, Georg Thieme Verlag, keyword ā€œpolymers ".
  • Ionically dissociable groups dissociate in sufficiently polar solvents (eg, water) to ions and counterions. Accordingly, the at least one polymer in the ready-to-use dilute rinse aid in aqueous solution is at least partially in ionic form. In the context of the invention it is sufficient if the at least one polymer has cationic dissociable groups. Preferably, however, the at least one polymer is an ampholytic polymer, i. it has both cationic and anionic dissociable groups.
  • the at least one polymer may comprise at least one monomer unit having at least one cationic dissociable group and / or at least one monomer unit having at least one anionic dissociable group.
  • the at least one polymer particularly preferably comprises at least one monomer unit having at least one quaternary ammonium function and / or at least one monomer unit having at least one carboxyl function.
  • the at least one polymer has an average molecular weight greater than 10,000, preferably greater than 50,000, more preferably greater than 100,000, and / or less than 1,000,000, preferably less than 500,000.
  • the at least one polymer is an acrylate or methacrylate based copolymer. It is preferred that the copolymer comprise as monomer units at least one quaternary ammonium compound and / or N-isopropylacrylamide and / or 2-acrylamido-2-methyl-1-propanesulfonic acid, preferably the quaternary Ammonium compound is methacrylamidopropyltrimethylammonium chloride.
  • Cationic and ampholytic polymers are known in the art.
  • EP 1 767 554 A1 discloses an acrylate or methacrylate based ampholytic polymer comprising as monomer units a quaternary ammonium compound (eg methacrylamidopropyltrimethylammonium chloride), N-isopropylacrylamide and optionally 2-acrylamido-2-methyl-1-propanesulphonic acid.
  • quaternary ammonium compound eg methacrylamidopropyltrimethylammonium chloride
  • N-isopropylacrylamide e.g 2-acrylamido-2-methyl-1-propanesulphonic acid
  • Corresponding polymers are commercially available.
  • the surfactant-free rinse aid used according to the invention may contain more than one polymer with cationic dissociable groups or a combination of cationic and anionic dissociable groups.
  • the surfactant-free rinse aid contains two polymers with cationic dissociable groups or a combination of cationic and anionic dissociable groups.
  • the surfactant-free rinse aid used according to the invention preferably has a proportion of polymers with cationic dissociable groups or a combination of cationic and anionic dissociable groups of at least 0.001 wt .-%, preferably at least 0.01 wt .-%, more preferably at least 0.1 wt. -%, more preferably at least 1 wt .-%, more preferably at least 2 wt .-%, particularly preferably at least 3 wt .-%, and / or at most 40 wt .-%, preferably at most 30 wt .-%, more preferably at most 20% by weight, more preferably at most 10% by weight, particularly preferably at most 5% by weight.
  • the surfactant-free rinse aid used according to the invention may contain further ingredients.
  • the surfactant-free rinse aid may contain at least one acid for adjusting the pH and / or as a complexing agent.
  • the at least one acid may be an organic acid, preferably an alpha-hydroxy carboxylic acid such as citric acid, tartaric acid, malic acid, lactic acid, etc. Citric acid is particularly preferred.
  • the surfactant-free rinse aid preferably contains from 0.5 to 30% by weight of acid.
  • the surfactant-free rinse aid particularly preferably contains from 5 to 20% by weight of acid.
  • the surfactant-free rinse aid additionally contains at least one polycarboxylate, preferably a polyacrylate, more preferably a copolymer of acrylic acid with 2,5-furandione.
  • the list of possible ingredients is not exhaustive.
  • the rinse aid used according to the invention will generally contain water, preferably fully desalted water, as solvent.
  • the surfactant-free rinse aid used according to the invention diluted ready for use in aqueous solution at a temperature of 20 Ā° C., has a surface tension> 50 mN / m, preferably> 60 mN / m, measured using the ring-break method according to DeNoĆ¼y).
  • the inventive use of the surfactant-free rinse aid at a temperature of the rinse water of 65 Ā° C to 95 Ā° C, more preferably from 80 Ā° C to 90 Ā° C, more preferably of 85 Ā° C.
  • the list of procedural steps is not exhaustive.
  • the method may, in particular, comprise a plurality of purification steps and / or optionally one or more preliminary or intermediate rinsing steps.
  • the rinse step b) will generally be the final step in the machine cleaning process in which the plastic parts are rinsed with liquid.
  • a drying step preferably a drying with hot air, is provided following the rinsing step.
  • the plastic parts may be subjected to sterilization, preferably thermal sterilization.
  • the thermal sterilization is particularly preferably a steam sterilization.
  • the steam sterilization is carried out at temperatures of 121-134 Ā° C, preferably at a temperature of 134 Ā° C.
  • the purification in step a) at 50 Ā° C to 85 Ā° C, preferably at 55 Ā° C to 70 Ā° C and particularly preferably at 60 Ā° C and / or the rinse in step b) at 65 Ā° C to 95 Ā° C, preferably at 80 Ā° C to 90 Ā° C, more preferably carried out at 85 Ā° C.
  • the rinse aid used according to the invention and the process can be used in connection with any type of plastic parts which are accessible to mechanical cleaning.
  • the invention may be used in the cleaning of plastic parts in the field of medical devices, foodstuffs and laboratories.
  • the rinse aid used according to the invention and the process can find use in the mechanical cleaning of plastic parts which consist of polysulfone, polyphenylsulfone, polyetherimide, polyphenylene oxide, ABS (acrylonitrile-butadiene-styrene) plastics and polycarbonate plastics. These plastics are particularly susceptible to stress cracking.
  • Three rinse aids which can be used according to the invention are prepared according to the following formulations.
  • the amounts of the starting materials to be used are given in% by weight.
  • Example 1.1 Amount used (in%) CAS-No. 1-propanaminium, N, N, N-trimethyl-3 - [(2-methyl-1-oxo-2-propenyl) amino] -, chloride, polymer with ethyl 2-propenoate and sodium 2-propenoate 2.6 192003-74-0 2-propenoic acid, polymer with 2,5-furandione, sodium salt 0.4 52255-49-9 citric acid 10 5949-29-1 water ad.
  • Example 1.2 1-propanaminium, N, N, N-trimethyl-3 - ((2-methyl-1-oxo-2-propen-1-yl) amino) -, chloride, polymer with N- (1-methylethyl) -2- propenamides, 2-methyl-2 - ((1-oxo-2-propen-1-yl) amino) -1-propanesulfonic acid and 2-propenoic acid, sodium salt 5.2 880345-00-6 Aziridines, polymer with 2- (chloromethyl) oxiranes and oxiranes, N- (2-carboxyethyl) derivs. 0.4 845752-17-2 citric acid 10 5949-29-1 water ad.
  • Example 1.3 1-propanaminium, N, N, N-trimethyl-3 - [(2-methyl-1-oxo-2-propenyl) amino] -, chloride, polymer with ethyl 2-propenoate and sodium 2-propenoate 5.5 192003-74-0 citric acid 10 5949-29-1 water ad. 100
  • Fig. 1 shows the drying result achieved according to the invention
  • Fig. 2 the comparison in the rinse with (fully desalted) water. According to the invention remained very few drops on the surface (5 drops or less on the top), in the comparison, the drying was significantly worse (more than 100 drops on the top). Even with the omission of the final drying step, a very good drying of the cages was achieved.
  • test animal cages or experimental cage parts made of polysulfone, polyphenylsulfone, polyetherimide and polycarbonate were added in a simulated rinse step with 1 ml / l of a rinse aid according to each of Examples 1.1 to 1.3 in 85 Ā° C hot water. Then, the cages or cage parts were dried with hot air and then steam-sterilized at 134 Ā° C for 10 min in an autoclave. 10 cycles were performed. There were no stress cracking (see Fig. 3 ).

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Description

Die Erfindung betrifft die Verwendung eines KlarspĆ¼lers bei der maschinellen Reinigung von Kunststoffteilen sowie ein Verfahren zur maschinellen Reinigung von Kunststoffteilen.The invention relates to the use of a rinse aid in the automated cleaning of plastic parts and a method for automated cleaning of plastic parts.

Die maschinelle Reinigung von Kunststoffteilen ist aus offenkundiger Vorbenutzung bekannt. Beispiele fĆ¼r GegenstƤnde, die entweder ganz oder teilweise aus Kunststoff bestehen und Ć¼blicherweise maschinell gereinigt werden, finden sich unter anderem im Lebensmittelbereich (z. B. Geschirr), im Medizinproduktebereich (z. B. chirurgische Instrumente) und im Laborbereich (z. B. VersuchstierkƤfige). Die Beanspruchung der Kunststoffteile im Rahmen der maschinellen Reinigung kann zur Bildung von Spannungsrissen im Kunststoff fĆ¼hren. Die Spannungsrissbildung hat eine deutlich verminderte Lebensdauer der Kunststoffteile zur Folge.The mechanical cleaning of plastic parts is known from public prior use. Examples of articles which are either entirely or partly made of plastic and are usually cleaned by machine are found, inter alia, in the food sector (eg crockery), in the field of medical devices (eg surgical instruments) and in the laboratory sector (eg. experimental animal cages). The stress of the plastic parts in the context of machine cleaning can lead to the formation of stress cracks in the plastic. The stress cracking has a significantly reduced lifetime of the plastic parts result.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zu Grunde, die maschinelle Reinigung von Kunststoffteilen zu verbessern.Against this background, the invention is based on the object to improve the mechanical cleaning of plastic parts.

Gelƶst wird diese Aufgabe durch die Merkmale der unabhƤngigen AnsprĆ¼che. Vorteilhafte AusfĆ¼hrungsformen der Erfindung sind in den abhƤngigen AnsprĆ¼chen offenbart.This object is achieved by the features of the independent claims. Advantageous embodiments of the invention are disclosed in the dependent claims.

Die Erfindung beruht auf der Ć¼berraschenden Erkenntnis, dass ein tensidfreier KlarspĆ¼ler, der mindestens ein Polymer umfasst, das kationische dissoziierbare Gruppen oder eine Kombination von kationischen und anionischen dissoziierbaren Gruppen aufweist, einerseits eine gute Trocknungswirkung an Kunststoffteilen erzielt und andererseits Spannungsrissbildung an diesen Kunststoffteilen vermeidet oder zumindest vermindert.The invention is based on the surprising finding that a surfactant-free rinse aid containing at least one polymer which has cationic dissociable groups or a combination of cationic and anionic dissociable groups, on the one hand achieves a good drying action on plastic parts and on the other hand avoids or at least reduces stress cracking on these plastic parts.

Dem geht die Erkenntnis voraus, dass die Spannungsrissbildung an Kunstoffteilen durch Kontakt der KunststoffoberflƤche mit den in KlarspĆ¼lern Ć¼blicherweise enthaltenen Tensiden sowie durch die Einwirkung hƶherer Temperaturen gefƶrdert wird. Letzteren kƶnnen die Kunststoffteile im Rahmen der maschinellen Reinigung beispielsweise bei einer HeiƟtrocknung und/oder im Zuge einer sich eventuell anschlieƟenden thermischen Sterilisation ausgesetzt sein.This is preceded by the knowledge that the stress cracking of plastic parts is promoted by contact of the plastic surface with the surfactants usually contained in rinse aids and by the action of higher temperatures. The latter, the plastic parts may be exposed in the context of machine cleaning, for example, in a hot-drying and / or in the course of any subsequent thermal sterilization.

ZunƤchst seien einige im Rahmen der Erfindung verwendete Begriffe erlƤutert.First, some terms used in the invention are explained.

Der Begriff maschinelle Reinigung bezeichnet die automatisch ablaufende Reinigung von GegenstƤnden, vorzugsweise in einer SpĆ¼lmaschine, wobei im Zuge der Reinigung kein menschlicher Eingriff erforderlich ist. Im Rahmen der Erfindung umfasst der Begriff SpĆ¼lmaschine jegliche im Stand der Technik bekannte SpĆ¼lmaschine, die sich zur Reinigung von Kunststoffteilen eignet, insbesondere gewerbliche oder im Haushalt einsetzbare GeschirrspĆ¼lmaschinen, sowie SpezialspĆ¼lmaschinen.The term machine cleaning refers to the automatic cleaning of objects, preferably in a dishwasher, wherein in the course of cleaning no human intervention is required. In the context of the invention, the term dishwasher includes any known in the prior art dishwasher, which is suitable for cleaning plastic parts, in particular commercial or household dishwashers, and special dishwashers.

Die maschinelle Reinigung von GegenstƤnden umfasst in der Regel mindestens einen Reinigungsschritt und einen KlarspĆ¼lschritt. Im Reinigungsschritt wird zum Lƶsen des anhaftenden Schmutzes Reinigungslƶsung auf die GegenstƤnde aufgebracht. Der KlarspĆ¼lschritt dient dazu, ggf. an den GegenstƤnden verbliebene Reste des Reinigungsmittels von diesen abzuspĆ¼len und den abschlieƟenden Trocknungsprozess zu verbessern. Daher ist der KlarspĆ¼lschritt im Allgemeinen der letzte Schritt im Rahmen der maschinellen Reinigung, bei dem die GegenstƤnde mit FlĆ¼ssigkeit gespĆ¼lt werden.Machine cleaning of articles usually involves at least one cleaning step and one final rinse step. In the cleaning step, cleaning solution is applied to the objects to release the adhering dirt. The rinsing step serves to rinse off residues of the cleaning agent remaining from the objects, if necessary, and to improve the final drying process. Therefore, the final rinse step is generally the final step in the machine cleaning process in which the objects are rinsed with liquid.

Im Rahmen der Erfindung bezeichnet der Begriff KlarspĆ¼ler eine Zusammensetzung, die beim maschinellen Reinigen von GegenstƤnden in SpĆ¼lmaschinen zur Verbesserung des abschlieƟenden Trocknungsvorgangs eingesetzt wird.In the context of the invention, the term rinse aid designates a composition which is used in the automatic cleaning of objects in dishwashers in order to improve the final drying process.

Der erfindungsgemƤƟ verwendete KlarspĆ¼ler ist tensidfrei, das heiƟt er enthƤlt keine Tenside. Tenside sind Verbindungen, welche die GrenzflƤchenspannung herabsetzen, d.h. amphiphile Verbindungen mit mindestens einem hydrophoben und einem hydrophilen MolekĆ¼lteil. Im Rahmen der Erfindung bezeichnet der Begriff Tenside die Gruppe bestehend aus anionischen Tensiden, kationischen Tensiden, amphoteren Tenside, nichtionischen Tensiden und Blockcopolymeren (insbesondere aus Ethylenoxid- und Propylenoxideinheiten). Zur ErlƤuterung dieser Tensidklassen wird beispielhaft verwiesen auf Rƶmpp Chemielexikon, 10. Auflage, Georg Thieme Verlag, Stichwort "Tenside".The rinse aid used according to the invention is surfactant-free, ie it contains no surfactants. Surfactants are compounds which lower the interfacial tension, i. amphiphilic compounds having at least one hydrophobic and one hydrophilic moiety. In the context of the invention, the term surfactants denotes the group consisting of anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants and block copolymers (in particular of ethylene oxide and propylene oxide units). For an explanation of these classes of surfactants, reference is made, for example, to Rƶmpp Chemielexikon, 10th edition, Georg Thieme Verlag, keyword "surfactants".

Der erfindungsgemƤƟ verwendete KlarspĆ¼ler enthƤlt mindestens ein Polymer, das kationische dissoziierbare Gruppen oder eine Kombination von kationischen und anionischen dissoziierbaren Gruppen aufweist. Als Polymere bezeichnet man aus niedermolekularen Monomereinheiten aufgebaute makromolekulare Verbindungen. Beispielhaft verwiesen wird auf Rƶmpp Chemielexikon, 10. Auflage, Georg Thieme Verlag, Stichwort "Polymere ".The rinse aid used according to the invention contains at least one polymer which has cationic dissociable groups or a combination of cationic and anionic dissociable groups. As polymers are called macromolecular compounds constructed from low molecular weight monomer units. For example, reference is made Rƶmpp Chemielexikon, 10th edition, Georg Thieme Verlag, keyword "polymers ".

Ionisch dissoziierbare Gruppen dissoziieren in hinreichend polaren Lƶsungsmitteln (z. B. Wasser) zu Ionen und Gegenionen. Dementsprechend liegt das mindestens eine Polymer im anwendungsfertig verdĆ¼nnten KlarspĆ¼ler in wƤssriger Lƶsung wenigstens teilweise in ionischer Form vor. Im Rahmen der Erfindung ist es ausreichend, wenn das mindestens eine Polymer kationische dissoziierbare Gruppen aufweist. Bevorzugt ist das mindestens eine Polymer jedoch ein ampholytisches Polymer, d.h. es weist sowohl kationische als auch anionische dissoziierbare Gruppen auf.Ionically dissociable groups dissociate in sufficiently polar solvents (eg, water) to ions and counterions. Accordingly, the at least one polymer in the ready-to-use dilute rinse aid in aqueous solution is at least partially in ionic form. In the context of the invention it is sufficient if the at least one polymer has cationic dissociable groups. Preferably, however, the at least one polymer is an ampholytic polymer, i. it has both cationic and anionic dissociable groups.

Vorzugsweise kann das mindestens eine Polymer wenigstens eine Monomereinheit mit zumindest einer kationischen dissoziierbaren Gruppe umfassen und/oder wenigstens eine Monomereinheit mit zumindest einer anionischen dissoziierbaren Gruppe umfassen. Besonders bevorzugt umfasst das mindestens eine Polymer wenigstens eine Monomereinheit mit zumindest einer quarternƤren Ammoniumfunktion und/oder wenigstens eine Monomereinheit mit zumindest einer Carboxylfunktion.Preferably, the at least one polymer may comprise at least one monomer unit having at least one cationic dissociable group and / or at least one monomer unit having at least one anionic dissociable group. The at least one polymer particularly preferably comprises at least one monomer unit having at least one quaternary ammonium function and / or at least one monomer unit having at least one carboxyl function.

Vorzugsweise hat das mindestens eine Polymer ein mittleres Molekulargewicht grĆ¶ĆŸer 10 000, vorzugsweise grĆ¶ĆŸer 50 000, weiter vorzugsweise grĆ¶ĆŸer 100 000, und/oder kleiner 1 000 000, vorzugsweise kleiner 500 000.Preferably, the at least one polymer has an average molecular weight greater than 10,000, preferably greater than 50,000, more preferably greater than 100,000, and / or less than 1,000,000, preferably less than 500,000.

Vorteilhafterweise ist das mindestens eine Polymer ein Copolymer auf Acrylat- oder Methacrylatbasis. Es ist bevorzugt, dass das Copolymer als Monomereinheiten wenigstens eine quarternƤre Ammoniumverbindung und/oder N-Isopropylacrylamid und/oder 2-Acrylamido-2-methyl-1-propansulfonsƤure umfasst, wobei vorzugsweise die quarternƤre Ammoniumverbindung Methacrylamidopropyltrimethylammoniumchlorid ist.Advantageously, the at least one polymer is an acrylate or methacrylate based copolymer. It is preferred that the copolymer comprise as monomer units at least one quaternary ammonium compound and / or N-isopropylacrylamide and / or 2-acrylamido-2-methyl-1-propanesulfonic acid, preferably the quaternary Ammonium compound is methacrylamidopropyltrimethylammonium chloride.

Kationische und ampholytische Polymere, wie sie im Rahmen der Erfindung Verwendung finden, sind dem Fachmann bekannt. Beispielhaft verwiesen wird auf die EP 1 767 554 A1 , die ein ampholytisches Polymer auf Acrylat- bzw. Methacrylatbasis beschreibt, das als Monomereinheiten eine quarternƤre Ammoniumverbindung (z. B. Methacrylamidopropyltrimethylammoniumchlorid), N-Isopropylacrylamid und optional 2-Acrylamido-2-methyl-1-propansulfonsƤure umfasst. Entsprechende Polymere sind kommerziell verfĆ¼gbar.Cationic and ampholytic polymers, as used in the context of the invention, are known in the art. For example, reference is made to the EP 1 767 554 A1 which discloses an acrylate or methacrylate based ampholytic polymer comprising as monomer units a quaternary ammonium compound (eg methacrylamidopropyltrimethylammonium chloride), N-isopropylacrylamide and optionally 2-acrylamido-2-methyl-1-propanesulphonic acid. Corresponding polymers are commercially available.

Der erfindungsgemƤƟ verwendete tensidfreie KlarspĆ¼ler kann mehr als ein Polymer mit kationischen dissoziierbaren Gruppen oder einer Kombination von kationischen und anionischen dissoziierbaren Gruppen enthalten. Vorzugsweise enthƤlt der tensidfreie KlarspĆ¼ler zwei Polymere mit kationischen dissoziierbaren Gruppen oder einer Kombination von kationischen und anionischen dissoziierbaren Gruppen.The surfactant-free rinse aid used according to the invention may contain more than one polymer with cationic dissociable groups or a combination of cationic and anionic dissociable groups. Preferably, the surfactant-free rinse aid contains two polymers with cationic dissociable groups or a combination of cationic and anionic dissociable groups.

Der erfindungsgemƤƟ verwendete tensidfreie KlarspĆ¼ler weist vorzugsweise einen Anteil an Polymeren mit kationischen dissoziierbaren Gruppen oder einer Kombination von kationischen und anionischen dissoziierbaren Gruppen von mindestens 0,001 Gew.-%, vorzugsweise mindestens 0,01 Gew.-%, weiter vorzugsweise mindestens 0,1 Gew.-%, weiter vorzugsweise mindestens 1 Gew.-%, weiter vorzugsweise mindestens 2 Gew.-%, besonders bevorzugt mindestens 3 Gew.-%, und/oder maximal 40 Gew.-%, vorzugsweise maximal 30 Gew.-%, weiter vorzugsweise maximal 20 Gew.-%, weiter vorzugsweise maximal 10 Gew.-%, besonders bevorzugt maximal 5 Gew.-% auf.The surfactant-free rinse aid used according to the invention preferably has a proportion of polymers with cationic dissociable groups or a combination of cationic and anionic dissociable groups of at least 0.001 wt .-%, preferably at least 0.01 wt .-%, more preferably at least 0.1 wt. -%, more preferably at least 1 wt .-%, more preferably at least 2 wt .-%, particularly preferably at least 3 wt .-%, and / or at most 40 wt .-%, preferably at most 30 wt .-%, more preferably at most 20% by weight, more preferably at most 10% by weight, particularly preferably at most 5% by weight.

Der erfindungsgemƤƟ verwendete tensidfreie KlarspĆ¼ler kann weitere Inhaltsstoffe enthalten. Beispielsweise kann der tensidfreie KlarspĆ¼ler zur Einstellung des pH-Werts und/oder als Komplexbildner wenigstens eine SƤure enthalten. Bei der wenigstens einen SƤure kann es sich um eine organische SƤure, vorzugsweise um eine Ī±-HydroxyCarbonsƤure wie CitronensƤure, WeinsƤure, ƄpfelsƤure, MilchsƤure usw. handeln. CitronensƤure ist besonders bevorzugt. Vorzugsweise enthƤlt der tensidfreie KlarspĆ¼ler 0,5 bis 30 Gew.-% SƤure. Besonders bevorzugt enthƤlt der tensidfreie KlarspĆ¼ler 5 bis 20 Gew.-% SƤure. Es ist vorteilhaft, wenn der tensidfreie KlarspĆ¼ler zusƤtzlich wenigstens ein Polycarboxylat, vorzugsweise ein Polyacrylat, besonders bevorzugt ein Copolymer von AcrylsƤure mit 2,5-Furandion enthƤlt. Die AufzƤhlung der mƶglichen Inhaltsstoffe ist nicht abschlieƟend. Insbesondere wird der erfindungsgemƤƟ verwendete KlarspĆ¼ler in der Regel Wasser, vorzugsweise voll entsalztes Wasser, als Lƶsungsmittel enthalten.The surfactant-free rinse aid used according to the invention may contain further ingredients. For example, the surfactant-free rinse aid may contain at least one acid for adjusting the pH and / or as a complexing agent. The at least one acid may be an organic acid, preferably an alpha-hydroxy carboxylic acid such as citric acid, tartaric acid, malic acid, lactic acid, etc. Citric acid is particularly preferred. The surfactant-free rinse aid preferably contains from 0.5 to 30% by weight of acid. The surfactant-free rinse aid particularly preferably contains from 5 to 20% by weight of acid. It is advantageous if the surfactant-free rinse aid additionally contains at least one polycarboxylate, preferably a polyacrylate, more preferably a copolymer of acrylic acid with 2,5-furandione. The list of possible ingredients is not exhaustive. In particular, the rinse aid used according to the invention will generally contain water, preferably fully desalted water, as solvent.

Vorteilhafterweise weist der erfindungsgemƤƟ verwendete tensidfreie KlarspĆ¼ler anwendungsfertig verdĆ¼nnt in wƤssriger Lƶsung bei einer Temperatur von 20 Ā°C eine OberflƤchenspannung > 50 mN/m, vorzugsweise > 60 mN/m auf Gemessen mit der RingabreiƟmethode nach DeNoĆ¼y).Advantageously, the surfactant-free rinse aid used according to the invention, diluted ready for use in aqueous solution at a temperature of 20 Ā° C., has a surface tension> 50 mN / m, preferably> 60 mN / m, measured using the ring-break method according to DeNoĆ¼y).

Vorzugsweise erfolgt die erfindungsgemƤƟe Verwendung des tensidfreien KlarspĆ¼lers bei einer Temperatur des SpĆ¼lwassers von 65 Ā°C bis 95 Ā°C, weiter vorzugsweise von 80 Ā°C bis 90 Ā°C, besonders bevorzugt von 85 Ā°C.Preferably, the inventive use of the surfactant-free rinse aid at a temperature of the rinse water of 65 Ā° C to 95 Ā° C, more preferably from 80 Ā° C to 90 Ā° C, more preferably of 85 Ā° C.

Bevorzugte Dosierungen eines KlarspĆ¼lerkonzentrats in Wasser kƶnnen 0,5 - 2 ml/l, beispielsweise ca. 1 ml/l sein. Gegenstand der Erfindung ist ferner ein Verfahren zur maschinellen Reinigung von Kunststoffteilen umfassend die Schritte:

  1. a. Reinigen der Kunststoffteile;
  2. b. KlarspĆ¼len der Kunststoffteile;
wobei in Schritt b) zur Vermeidung bzw. Verminderung von Spannungsrissbildung an den Kunststoffteilen die oben beschriebene erfindungsgemƤƟe Verwendung eines tensidfreien KlarspĆ¼lers erfolgt.Preferred dosages of a rinse aid concentrate in water may be 0.5-2 ml / l, for example about 1 ml / l. The invention furthermore relates to a method for the mechanical cleaning of plastic parts, comprising the steps:
  1. a. Cleaning the plastic parts;
  2. b. Rinsing the plastic parts;
wherein in step b) to avoid or reduce stress cracking on the plastic parts, the above-described inventive use of a surfactant-free rinse aid.

Die AufzƤhlung der Verfahrensschritte ist nicht abschlieƟend. Das Verfahren kann insbesondere mehrere Reinigungsschritte und/oder ggf. einen oder mehrere Vor- bzw. ZwischenspĆ¼lschritte umfassen. Wie oben bereits beschrieben, wird der KlarspĆ¼lschritt b) jedoch im Allgemeinen der letzte Schritt im Rahmen der maschinellen Reinigung sein, bei dem die Kunststoffteile mit FlĆ¼ssigkeit gespĆ¼lt werden. In der Regel wird im Anschluss an den KlarspĆ¼lschritt ein Trocknungsschritt, vorzugsweise eine Trocknung mit HeiƟluft, vorgesehen sein. Stattdessen oder zusƤtzlich kƶnnen die Kunststoffteile einer Sterilisation, vorzugsweise einer thermischen Sterilisation unterzogen werden. Besonders bevorzugt ist die thermische Sterilisation eine Dampfsterilisation. Vorteilhafterweise wird die Dampfsterilisation bei Temperaturen von 121-134 Ā°C, vorzugsweise bei einer Temperatur von 134 Ā°C durchgefĆ¼hrt.The list of procedural steps is not exhaustive. The method may, in particular, comprise a plurality of purification steps and / or optionally one or more preliminary or intermediate rinsing steps. However, as described above, the rinse step b) will generally be the final step in the machine cleaning process in which the plastic parts are rinsed with liquid. As a rule, a drying step, preferably a drying with hot air, is provided following the rinsing step. Instead or in addition, the plastic parts may be subjected to sterilization, preferably thermal sterilization. The thermal sterilization is particularly preferably a steam sterilization. Advantageously, the steam sterilization is carried out at temperatures of 121-134 Ā° C, preferably at a temperature of 134 Ā° C.

Die Merkmale des erfindungsgemƤƟen Verfahrens sind vorstehend im Kontext der erfindungsgemƤƟen Verwendung bereits erlƤutert worden.The features of the method according to the invention have already been explained above in the context of the use according to the invention.

Bevorzugt wird bei dem Reinigungsverfahren die Reinigung in Schritt a) bei 50 Ā°C bis 85 Ā°C, vorzugsweise bei 55 Ā°C bis 70 Ā°C und besonders bevorzugt bei 60 Ā°C und/oder das KlarspĆ¼len in Schritt b) bei 65 Ā°C bis 95 Ā°C, vorzugsweise bei 80 Ā°C bis 90 Ā°C, besonders bevorzugt bei 85 Ā°C durchgefĆ¼hrt.In the purification process, the purification in step a) at 50 Ā° C to 85 Ā° C, preferably at 55 Ā° C to 70 Ā° C and particularly preferably at 60 Ā° C and / or the rinse in step b) at 65 Ā° C to 95 Ā° C, preferably at 80 Ā° C to 90 Ā° C, more preferably carried out at 85 Ā° C.

Der erfindungsgemƤƟ verwendete KlarspĆ¼ler sowie das Verfahren kƶnnen im Zusammenhang mit jeglicher Art von Kunststoffteilen, die einer maschinellen Reinigung zugƤnglich sind, Einsatz finden. Beispielsweise kann die Erfindung bei der Reinigung von Kunststoffteilen im Medizinproduktebereich, Lebensmittelbereich und Laborbereich zum Einsatz kommen. Insbesondere kƶnnen der erfindungsgemƤƟ verwendete KlarspĆ¼ler sowie das Verfahren Einsatz finden bei der maschinellen Reinigung von Kunststoffteilen, die aus Polysulfon-, Polyphenylsulfon-, Polyetherimid-, Polyphenylenoxid-, ABS(Acrylnitril-Butadien-Styrol)-Kunststoffen und Polycarbonatkunststoffen bestehen. Diese Kunststoffe sind besonders spannungsrissgefƤhrdet.The rinse aid used according to the invention and the process can be used in connection with any type of plastic parts which are accessible to mechanical cleaning. For example, the invention may be used in the cleaning of plastic parts in the field of medical devices, foodstuffs and laboratories. In particular, the rinse aid used according to the invention and the process can find use in the mechanical cleaning of plastic parts which consist of polysulfone, polyphenylsulfone, polyetherimide, polyphenylene oxide, ABS (acrylonitrile-butadiene-styrene) plastics and polycarbonate plastics. These plastics are particularly susceptible to stress cracking.

AusfĆ¼hrungsbeispiele der Erfindung werden nachfolgend anhand der Beispiele beschrieben. In den Figuren zeigen:

  • Fig. 1 und 2: Trocknungsergebnisse der Erfindung und eines Vergleichs;
  • Fig. 3 und 4: Ergebnisse der PrĆ¼fung auf Spannungsrissbildung.
Embodiments of the invention are described below with reference to the examples. In the figures show:
  • Fig. 1 and 2 : Drying results of the invention and a comparison;
  • 3 and 4 : Results of the test for stress cracking.

Beispiel 1:Example 1:

Drei erfindungsgemƤƟ verwendbare KlarspĆ¼ler werden gemƤƟ den nachfolgenden Rezepturen zubereitet. Die Mengen der einzusetzenden Ausgangsstoffe sind in Gew.-% angegeben. Beispiel 1.1 Einsatzmenge aktiv (in %) CAS-Nr. 1-propanaminium, N,N,N-trimethyl-3-[(2-methyl-1-oxo-2-propenyl)amino]-, chloride, polymer with ethyl 2-propenoate and sodium 2-propenoate 2,6 192003-74-0 2-Propenoic acid, polymer with 2,5-furandione, sodium salt 0,4 52255-49-9 CitronensƤure 10 5949-29-1 Wasser ad. 100 Beispiel 1.2 1-Propanaminium, N,N,N-trimethyl-3-((2-methyl-1-oxo-2-propen-1-yl)amino)-, chloride, polymer with N-(1-methylethyl)-2-propenamide, 2-methyl-2-((1-oxo-2-propen-1-yl)amino)-1-propanesulfonic acid and 2-propenoic acid, sodium salt 5,2 880345-00-6 Aziridine, polymer with 2-(chloromethyl)oxirane and oxirane, N-(2-carboxyethyl) derivs. 0,4 845752-17-2 CitronensƤure 10 5949-29-1 Wasser ad. 100 Beispiel 1.3 1-propanaminium, N,N,N-trimethyl-3-[(2-methyl-1-oxo-2-propenyl)amino]-, chloride, polymer with ethyl 2-propenoate and sodium 2-propenoate 5,5 192003-74-0 CitronensƤure 10 5949-29-1 Wasser ad. 100 Three rinse aids which can be used according to the invention are prepared according to the following formulations. The amounts of the starting materials to be used are given in% by weight. Example 1.1 Amount used (in%) CAS-No. 1-propanaminium, N, N, N-trimethyl-3 - [(2-methyl-1-oxo-2-propenyl) amino] -, chloride, polymer with ethyl 2-propenoate and sodium 2-propenoate 2.6 192003-74-0 2-propenoic acid, polymer with 2,5-furandione, sodium salt 0.4 52255-49-9 citric acid 10 5949-29-1 water ad. 100 Example 1.2 1-propanaminium, N, N, N-trimethyl-3 - ((2-methyl-1-oxo-2-propen-1-yl) amino) -, chloride, polymer with N- (1-methylethyl) -2- propenamides, 2-methyl-2 - ((1-oxo-2-propen-1-yl) amino) -1-propanesulfonic acid and 2-propenoic acid, sodium salt 5.2 880345-00-6 Aziridines, polymer with 2- (chloromethyl) oxiranes and oxiranes, N- (2-carboxyethyl) derivs. 0.4 845752-17-2 citric acid 10 5949-29-1 water ad. 100 Example 1.3 1-propanaminium, N, N, N-trimethyl-3 - [(2-methyl-1-oxo-2-propenyl) amino] -, chloride, polymer with ethyl 2-propenoate and sodium 2-propenoate 5.5 192003-74-0 citric acid 10 5949-29-1 water ad. 100

Beispiel 2:Example 2:

Es wurden VersuchstierkƤfige aus Polyphenylsulfon in einer SpĆ¼lmaschine unter Verwendung des KlarspĆ¼lers aus Beispiel 1.1 gemƤƟ dem nachstehenden Programm gereinigt:

  • Reinigung bei 60 Ā°C mit neodisher LaboClean FLA (alkalischer Reiniger, erhƤltlich von der Firma Dr. Weigert), Dosierung 4 ml/l, Dauer 3 min
  • KlarspĆ¼lung bei 85 Ā°C mit dem KlarspĆ¼ler aus Beispiel 1, Dosierung 1 ml/l, Dauer 30 s
  • Trocknung mit HeiƟluft bei 115 Ā°C, Dauer 2 min.
Test animal cages of polyphenylsulfone were cleaned in a dishwasher using the rinse aid of Example 1.1 according to the following program:
  • Cleaning at 60 Ā° C with neodisher LaboClean FLA (alkaline cleaner, available from Dr. Weigert), dosage 4 ml / l, duration 3 min
  • Final rinse at 85 Ā° C with the rinse aid from Example 1, dosage 1 ml / l, duration 30 s
  • Drying with hot air at 115 Ā° C, duration 2 min.

Es wurde ein sehr gutes Trocknungsergebnis auf den KunststofftierkƤfigen erreicht, das gegenĆ¼ber der KlarspĆ¼lung mit lediglich (voll entsalztem) Wasser verbessert war. Fig. 1 zeigt das erfindungsgemƤƟ erreichte Trockungsergebnis, Fig. 2 den Vergleich bei der KlarspĆ¼lung mit (voll entsalztem) Wasser. ErfindungsgemƤƟ verblieben sehr wenige Tropfen auf der OberflƤche (5 Tropfen oder weniger auf der Oberseite), bei dem Vergleich war die Trocknung wesentlisch schlechter (mehr als 100 Tropfen auf der Oberseite). Selbst bei Weglassen des abschlieƟenden Trocknungsschritts wurde noch eine sehr gute Trocknung der KƤfige erzielt.It achieved a very good drying result on the plastic animal cages, which was improved over the rinse with only (fully desalted) water. Fig. 1 shows the drying result achieved according to the invention, Fig. 2 the comparison in the rinse with (fully desalted) water. According to the invention remained very few drops on the surface (5 drops or less on the top), in the comparison, the drying was significantly worse (more than 100 drops on the top). Even with the omission of the final drying step, a very good drying of the cages was achieved.

Beispiel 3:Example 3:

Verschiedene VersuchstierkƤfige bzw. VersuchstierkƤfigteile aus Polysulfon, Polyphenylsulfon, Polyetherimid und Polycarbonat wurden in einem simulierten KlarspĆ¼lschritt bei mit 1 ml/l eines KlarspĆ¼lers gemƤƟ jedem der Beispiele 1.1 bis 1.3 in 85 Ā°C heiƟem Wasser versetzt. Dann wurden die KƤfige bzw. KƤfigteile mit HeiƟluft getrocknet und anschlieƟend bei 134 Ā°C 10 min in einem Autoklaven dampfsterilisiert. Es wurden 10 Zyklen durchgefĆ¼hrt. Es zeigten sich keine Spannungsrissbildungen (siehe Fig. 3).Various test animal cages or experimental cage parts made of polysulfone, polyphenylsulfone, polyetherimide and polycarbonate were added in a simulated rinse step with 1 ml / l of a rinse aid according to each of Examples 1.1 to 1.3 in 85 Ā° C hot water. Then, the cages or cage parts were dried with hot air and then steam-sterilized at 134 Ā° C for 10 min in an autoclave. 10 cycles were performed. There were no stress cracking (see Fig. 3 ).

Vergleichsbeispiel:Comparative Example:

Wie Beispiel 3, jedoch wurde als KlarspĆ¼ler ein herkƶmmlicher KlarspĆ¼ler auf Basis von nichtionischen Tensiden verwendet. Es zeigten sich Spannungsrissbildungen an den Kunststoffteilen (siehe Fig. 4).Like example 3, however, a conventional rinse aid based on nonionic surfactants was used as rinse aid. There were stress cracking on the plastic parts (see Fig. 4 ).

Claims (15)

  1. Use of a surfactant-free rinse aid, comprising at least one polymer having cationic dissociable groups or a combination of cationic and anionic dissociable groups, in the machine cleaning of plastic parts for preventing or reducing stress crack formation on said plastic parts.
  2. Use of a surfactant-free rinse aid according to Claim 1, characterized in that the at least one polymer has anionic and cationic dissociable groups.
  3. Use of a surfactant-free rinse aid according to either of Claims 1 or 2, characterized in that the at least one polymer comprises at least one monomer unit having at least one cationic dissociable group and/or comprises at least one monomer unit having at least one anionic dissociable group.
  4. Use of a surfactant-free rinse aid according to Claim 3, characterized in that the at least one polymer comprises at least one monomer unit having at least one quaternary ammonium function and/or comprises at least one monomer unit having at least one carboxyl function.
  5. Use of a surfactant-free rinse aid according to any of Claims 1 to 4, characterized in that the at least one polymer is a copolymer based on acrylate or methacrylate.
  6. Use of a surfactant-free rinse aid according to Claim 5, characterized in that the copolymer comprises at least one quaternary ammonium compound and/or N-isopropylacrylamide and/or 2-acrylamido-2-methyl-1-propanesulphonic acid as monomer units, wherein the quaternary ammonium compound is preferably methacrylamidopropyltrimethylammonium chloride.
  7. Use of a surfactant-free rinse aid according to any of Claims 1 to 6, characterized in that the proportion of polymers in the rinse aid having cationic dissociable groups or a combination of cationic and anionic dissociable groups is at least 0.001% by weight, preferably at least 0.01% by weight, more preferably at least 0.1% by weight, more preferably at least 1% by weight, more preferably at least 2% by weight, particularly preferably at least 3% by weight, and/or at most 40% by weight, preferably at most 30% by weight, more preferably at most 20% by weight, more preferably at most 10% by weight, particularly preferably at most 5% by weight.
  8. Use of a surfactant-free rinse aid according to any of Claims 1 to 7, characterized in that the at least one polymer has an average molecular weight greater than 10 000, preferably greater than 50 000, more preferably greater than 100 000, and/or less than 1 000 000, preferably less than 500 000.
  9. Use of a surfactant-free rinse aid according to any of Claims 1 to 8, characterized in that the surfactant-free rinse aid diluted in aqueous solution ready for use has a surface tension of > 50 mN/m, preferably > 60 mN/m at a temperature of 20Ā°C.
  10. Use of a surfactant-free rinse aid according to any of Claims 1 to 9, characterized in that the plastic parts are composed of plastics selected from the group consisting of polysulphone, polyphenylsulphone, polyetherimide, polyphenylene oxide, ABS (acrylonitrile-butadiene-styrene) and polycarbonate plastics.
  11. Use of a surfactant-free rinse aid according to any of Claims 1 to 10, characterized in that the surfactant-free rinse aid comprises at least one acid, wherein the at least one acid is preferably an organic acid, more preferably a food acid, particularly preferably citric acid.
  12. Use of a surfactant-free rinse aid according to Claim 11, characterized in that the surfactant-free rinse aid comprises 0.5 to 30% by weight, preferably 5 to 20% by weight of acid.
  13. Use of a surfactant-free rinse aid according to any of Claims 1 to 12, characterized in that the surfactant-free rinse aid additionally comprises at least one polycarboxylate.
  14. Process for machine cleaning of plastic parts, comprising the steps:
    a) cleaning of the plastic parts;
    b) rinsing of the plastic parts;
    characterized in that a surfactant-free rinse aid according to any of Claims 1 to 13 is used in step b) for preventing or reducing stress crack formation on the plastic parts.
  15. Process according to Claim 14, characterized in that
    the cleaning in step a) is carried out at 50Ā°C to 85Ā°C, preferably at 55Ā°C to 70Ā°C and particularly preferably at 60Ā°C, and/or
    the rinsing in step b) is carried out at 65Ā°C to 95Ā°C, preferably at 80Ā°C to 90Ā°C, particularly preferably at 85Ā°C, and/or
    the plastic parts are additionally subjected to a thermal sterilization, wherein the thermal sterilization is preferably a steam sterilization, in which the steam sterilization is preferably carried out at temperatures from 121-134Ā°C, particularly preferably at a temperature of 134Ā°C.
EP12172503.0A 2012-06-19 2012-06-19 Machine cleaning of plastic parts Active EP2677022B1 (en)

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SI201230434T SI2677022T1 (en) 2012-06-19 2012-06-19 Machine cleaning of plastic parts
HUE12172503A HUE026648T2 (en) 2012-06-19 2012-06-19 Machine cleaning of plastic parts
ES12172503.0T ES2556982T3 (en) 2012-06-19 2012-06-19 Machine cleaning of plastic parts
PT121725030T PT2677022E (en) 2012-06-19 2012-06-19 Machine cleaning of plastic parts
PL12172503T PL2677022T3 (en) 2012-06-19 2012-06-19 Machine cleaning of plastic parts

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US11512266B2 (en) 2019-07-16 2022-11-29 The Procter & Gamble Company Disinfectant composition

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PL2886635T3 (en) * 2013-12-20 2019-07-31 Chemische Fabrik Dr. Weigert Gmbh & Co. Kg Disinfectant

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DE19545630A1 (en) * 1995-12-07 1997-06-12 Henkel Kgaa Detergent for hard surfaces
AU5788099A (en) * 1998-08-27 2000-03-21 Rhodia Inc. Liquid hard surface cleaner rinse
US6703358B1 (en) * 2000-07-13 2004-03-09 Rhodia Chimie Cleaning composition for hard surfaces
US7807766B2 (en) 2005-09-21 2010-10-05 Cognis Ip Management Gmbh Polymers for use in cleaning compositions
BRPI0913980A2 (en) * 2008-06-30 2015-10-27 Basf Se hard surface cleaning composition, cloudiness preventive film, and method for cleaning a hard surface

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US11512266B2 (en) 2019-07-16 2022-11-29 The Procter & Gamble Company Disinfectant composition

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PT2677022E (en) 2016-01-22
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PL2677022T3 (en) 2016-04-29
SI2677022T1 (en) 2016-02-29

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