EP2677022B1 - Maschinelle Reinigung von Kunststoffteilen - Google Patents

Maschinelle Reinigung von Kunststoffteilen 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.)
Active
Application number
EP12172503.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2677022A1 (de
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
Original Assignee
Chemische Fabrik Dr Weigert GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chemische Fabrik Dr Weigert GmbH and Co filed Critical Chemische Fabrik Dr Weigert GmbH and Co
Priority to PT121725030T priority Critical patent/PT2677022E/pt
Priority to HUE12172503A priority patent/HUE026648T2/en
Priority to EP12172503.0A priority patent/EP2677022B1/de
Priority to PL12172503T priority patent/PL2677022T3/pl
Priority to ES12172503.0T priority patent/ES2556982T3/es
Priority to SI201230434T priority patent/SI2677022T1/sl
Publication of EP2677022A1 publication Critical patent/EP2677022A1/de
Application granted granted Critical
Publication of EP2677022B1 publication Critical patent/EP2677022B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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 Römpp Chemielexikon, 10th edition, Georg Thieme Verlag, keyword “polymers ".
  • 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 ° C., has a surface tension> 50 mN / m, preferably> 60 mN / m, measured using the ring-break method according to DeNoüy).
  • the inventive use of the surfactant-free rinse aid at a temperature of the rinse water of 65 ° C to 95 ° C, more preferably from 80 ° C to 90 ° C, more preferably of 85 ° 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 ° C, preferably at a temperature of 134 ° C.
  • the purification in step a) at 50 ° C to 85 ° C, preferably at 55 ° C to 70 ° C and particularly preferably at 60 ° C and / or the rinse in step b) at 65 ° C to 95 ° C, preferably at 80 ° C to 90 ° C, more preferably carried out at 85 ° 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 ° C hot water. Then, the cages or cage parts were dried with hot air and then steam-sterilized at 134 ° C for 10 min in an autoclave. 10 cycles were performed. There were no stress cracking (see Fig. 3 ).

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)
EP12172503.0A 2012-06-19 2012-06-19 Maschinelle Reinigung von Kunststoffteilen Active EP2677022B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PT121725030T PT2677022E (pt) 2012-06-19 2012-06-19 Limpeza mecânica de peças de plástico
HUE12172503A HUE026648T2 (en) 2012-06-19 2012-06-19 Machine cleaning of plastic parts
EP12172503.0A EP2677022B1 (de) 2012-06-19 2012-06-19 Maschinelle Reinigung von Kunststoffteilen
PL12172503T PL2677022T3 (pl) 2012-06-19 2012-06-19 Maszynowe czyszczenie części z tworzyw sztucznych
ES12172503.0T ES2556982T3 (es) 2012-06-19 2012-06-19 Limpieza a máquina de piezas de plástico
SI201230434T SI2677022T1 (sl) 2012-06-19 2012-06-19 Strojno čiščenje delov iz umetnih snovi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12172503.0A EP2677022B1 (de) 2012-06-19 2012-06-19 Maschinelle Reinigung von Kunststoffteilen

Publications (2)

Publication Number Publication Date
EP2677022A1 EP2677022A1 (de) 2013-12-25
EP2677022B1 true EP2677022B1 (de) 2015-10-21

Family

ID=46262034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12172503.0A Active EP2677022B1 (de) 2012-06-19 2012-06-19 Maschinelle Reinigung von Kunststoffteilen

Country Status (6)

Country Link
EP (1) EP2677022B1 (pt)
ES (1) ES2556982T3 (pt)
HU (1) HUE026648T2 (pt)
PL (1) PL2677022T3 (pt)
PT (1) PT2677022E (pt)
SI (1) SI2677022T1 (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11512266B2 (en) 2019-07-16 2022-11-29 The Procter & Gamble Company Disinfectant composition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2886635T3 (pl) * 2013-12-20 2019-07-31 Chemische Fabrik Dr. Weigert Gmbh & Co. Kg Środek dezynfekujący

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545630A1 (de) * 1995-12-07 1997-06-12 Henkel Kgaa Reinigungsmittel für harte Oberflächen
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
KR101451465B1 (ko) * 2008-06-30 2014-10-16 바스프 에스이 경질 표면 처리용 양쪽성 중합체

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11512266B2 (en) 2019-07-16 2022-11-29 The Procter & Gamble Company Disinfectant composition

Also Published As

Publication number Publication date
PL2677022T3 (pl) 2016-04-29
SI2677022T1 (sl) 2016-02-29
HUE026648T2 (en) 2016-07-28
EP2677022A1 (de) 2013-12-25
ES2556982T3 (es) 2016-01-21
PT2677022E (pt) 2016-01-22

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