EP1082228A1 - Verfahren zum reinigen von druckmaschinen und druckformen - Google Patents
Verfahren zum reinigen von druckmaschinen und druckformenInfo
- Publication number
- EP1082228A1 EP1082228A1 EP99925019A EP99925019A EP1082228A1 EP 1082228 A1 EP1082228 A1 EP 1082228A1 EP 99925019 A EP99925019 A EP 99925019A EP 99925019 A EP99925019 A EP 99925019A EP 1082228 A1 EP1082228 A1 EP 1082228A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- printing
- microemulsion
- cleaning
- oil
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
- B41N3/06—Preparing for use and conserving printing surfaces by use of detergents
-
- 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
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
- C11D17/0017—Multi-phase liquid compositions
- C11D17/0021—Aqueous microemulsions
Definitions
- the invention relates to a method for cleaning printing machines and printing forms, in particular for removing printing inks, for example printing inks based on oil or radiation-curable printing inks, from the cylinders and rollers of printing machines, in particular flat or offset printing machines, and printing forms. for example when printing is interrupted.
- cleaning agents based on organic solvents and / or aqueous solutions are generally used.
- the parts of the printing press that come into contact with the printing ink are cleared of ink residues.
- the printing process is interrupted, printing forms, especially planographic printing forms, must be carefully cleaned of ink residues and coated with preservation solutions based on hydrophilic polymers to maintain the hydrophilicity of the non-image areas.
- Cleaners that consist exclusively or predominantly of non-polar organic solvents also have the disadvantage that the solvent residues adhering to the parts to be cleaned, for example pressure rollers, cannot be washed off with water after cleaning.
- a clean printing roller is a prerequisite for good wetting with the printing ink and good ink transfer.
- the ink-guiding stencil can also be detached from the cleaning agent and thereby damaged or even rendered unusable.
- DE-B 27 24 557 describes a cleaning agent for lithographic printing plates which contains water and water-miscible organic solvents. Its cleaning effect compared to viscous oil-based printing inks is naturally limited.
- GB-A 2 089 289 describes oil-in-water and water-in-oil emulsions as cleaners.
- the disadvantage here is the relatively high interfacial tension between the water and oil phases, so that lipophilic, highly hydrophobic offset printing inks, because of their high interfacial energy, are absorbed by the water-continuous cleaning solution only slowly and only to a small extent.
- Emulsions of this type are otherwise only kinetically, but not thermodynamically stable, so that they tend to segregate [creaming (settling), thickening, flocculation] in particular in the case of temperature fluctuations and their applicability is thereby impaired.
- UV-curable offset or high-pressure inks based on polymerizable monomeric or oligomeric acrylates is particularly difficult.
- esters or mixtures of esters and mineral oil are generally used.
- the object of the invention was to provide a cleaning method and a liquid cleaning agent which allow printing inks to be removed quickly and effectively without the environment being burdened by vapors of volatile organic components or the printing stencil being attacked by printing forms.
- the invention relates to a method for cleaning printing presses or printing forms, in which the contaminants are removed from the surface by washing with a liquid.
- the process according to the invention is characterized in that the liquid is a preferably bicontinuous microemulsion which contains water, a surface-active agent and, as an oil phase, an organic solvent which is immiscible with water.
- a microemulsion is to be understood as a liquid, preferably bicontinuous mixture of water and oil phase with an extremely low interfacial tension between the water and oil phase, that is to say an interfacial tension which is up to three powers of ten less than that of a conventional water in-oil or oil-in-water emulsion.
- this interfacial tension is in the range from 10 "3 to 10 " 7 , preferably 10 "4 to 10 " 6 N / m, in the case of emulsions it is usually in the range from 10 "3 to 10 " 2 N / m.
- a microemulsion in the sense of the present description is thermodynamically stable, visually transparent and preferably of low viscosity.
- Conventional conventional emulsions can contain oil and water phases in very different proportions by volume. They have a continuous and a disperse phase, which is present in the continuous phase as very small spheres stabilized by coating with surfactants. Depending on the nature of the continuous phase, one speaks of oil-in-water or water-in-oil emulsions. In the ideal case, these emulsions are kinetically stable, ie they remain intact for a long time, but not indefinitely. In particular in the case of temperature fluctuations, they can tend to phase separation by sitting, creaming, thickening or flaking.
- Bicontinuous microemulsions contain two phases, a water phase and an oil phase, in the form of extended domains that lie side by side and intertwined, with interface-stabilizing interfaces at their interfaces Surfactants are enriched in a monomolecular layer. Bicontinuous microemulsions form very easily, usually because of the very low interfacial tension, if the individual components, water, oil and a suitable surfactant system, are mixed. Since the domains have only very small dimensions in the order of nanometers in at least one dimension, the microemulsions appear visually transparent and, depending on the surface-active system used, are thermodynamically stable in a certain temperature range, that is to say indefinitely.
- Bicontinuous microemulsions are, for example, in the article "Microemulsions - a scientific and technical treasure trove?” by H.-F. Eicke in S ⁇ FW-Journal 118 (1992), pages 311 to 314.
- the microemulsions contain certain amphiphiles, i.e. surface-active agents, and in their aqueous phase frequently dissolved electrolytes and optionally other auxiliary substances. Electrolytes are mainly added when the amphiphiles are partially or exclusively ionic surfactants.
- microemulsions for the extraction of organic pollutants from contaminated soils is described in WO 94/04289.
- Tertiary oil production has also become known as an area of application for microemulsions.
- a cleaning agent for carrying out the method according to the invention which consists of a microemulsion which contains water, a surface-active agent and a water-immiscible organic solvent.
- the components of the microemulsion should be selected so that they do not change the mechanical properties of device parts or sealing materials made of rubber or similar materials, such as elasticity, flexibility, dimensional stability, etc., by swelling or shrinking (swelling).
- Organic solvents which are immiscible with water are advantageously those having a boiling range above 100, preferably above 150 ° C., in particular from 200 to 400 ° C. In general, organic solvents with 15 flash points above 100 ° C are used.
- Organic solvents include fats and oils, e.g. Beet oil, fatty acid esters, ethers, ketones, aldehydes and hydrocarbons.
- esters especially alkyl esters, are of longer chain fatty acids
- the alkyl group of the alcohol component generally has 1 to 20, preferably 1 to 16 carbon atoms.
- the fatty acid component normally has 6 to 25, preferably 8 to 18 carbon atoms and can be linear or branched, saturated or unsaturated and contain up to three double bonds in the molecule.
- the esters generally have an iodine number ranging from 0 to about
- esters are methyl, ethyl, isopropyl, n-buryl, n-hexyl, 2-ethylhexyl ester and / or
- Individual typical esters are, for example, 2-ethylhexyl coconut fatty acid, n-hexyl tall oil fatty acid, rapeseed methyl ester, methyl oleic acid, methyl stearate, isopropyl palmitate, ethyl laurate, 2-
- ethers with a high boiling range e.g. Dioctyl ether and tricylycerides such as rapeseed oil, coconut oil or soybean oil are suitable.
- the esters are characterized by a very low vapor pressure, so that when they are used there is no pollution of the atmosphere.
- the volume fractions of the aqueous and organic phases are approximately of the same order of magnitude, i.e. ,
- the volume ratio of water to organic phase is generally 10:90 to 90:10, preferably 25:75 to 75:25, in particular 40:60 to 60:40.
- amphiphilic characters can be used as surfactants, hereinafter also referred to as surfactants, ie anionic, cationic, amphoteric and nonionic surfactants or mixtures thereof.
- Suitable anionic surfactants are C 10 to C 20 , preferably C 12 to C 16 alkyl sulfates, for example sodium dodecyl sulfate; C, 0 to C 20 , preferably C 12 to C 16 alkyl polyether sulfates, for example sodium dodecyloxypolyethoxysulfate; Alkali salts of diisooctylsulfosuccinic acid; Alkali salts of alkylbenzenesulfonic acids, for example sodium dodecylbenzenesulfonate, of dialkyl phosphates, and of carboxylates, for example of fatty alkyl ether carboxylates.
- anionic surfactants for example sodium dodecyl sulfate
- alkanols such as butanol, pentanol or hexanol
- alkali or alkaline earth metal salts for example sodium chloride, sodium sulfate or calcium chloride, or with other electrolytes, for example NaOH, KOH , Phosphates or silicates used.
- the microemulsions used according to the invention can also contain complexing agents such as ethylenediaminetetraacetic acid, nitrilotriacetic acid or methylglycinediacetic acid, corrosion inhibitors and / or preservatives.
- the alkanols can be added in amounts of up to 20, preferably up to 10% by weight, the electrolytes in amounts of up to 10, preferably up to 5% by weight.
- Cationic surfactants which can be used to prepare microemulsions are, for example, alkyltrimemylammonium halides with alkyl chain lengths of about 8 to 18 carbon atoms and / or quaternized imidazolinium or pyridinium salts.
- Suitable nonionic or nonionic surfactants are polyglycol monoalkyl ethers with alkyl chain lengths of C 8 to C lg, preferably C 10 to C 16 , and
- C 10 to C 15 alkyl ethers of polyglycols with 3 to 10 oxyalkylene units are frequently used. These are mostly technical products with a more or less broad molecular weight distribution. Surfactants with a narrow molecular weight distribution produced using special casters can also be used.
- Triglyceride alkoxylates e.g. Reaction products of 1 mol of triglyceride with 1 to 50 mol of alkylene oxide, particularly 10 to 50 mol of ethylene oxide, are suitable.
- surfactants based on saccharides for example alkyl polyglucosides or glucosamides, can be used.
- microemulsions used according to the invention preferably contain anionic surfactants, usually in combination with one or more nonionic surfactants. However, it is also possible to produce microemulsions using only nonionic surfactants. In order to achieve an optimal cleaning effect, in certain cases for each combination of organic solvent, surfactant or surfactants and, where appropriate, electrolytes and complexing agents in aqueous solution, certain relatively narrow quantitative ranges of the individual components are required, which can be determined by simple routine tests. In general, the total amount of surfactants in the microemulsion is in the range from 1 to 35, preferably 1 to 25 and in particular 7 to 25% by weight. If the surfactant content is too high, cleaning problems can arise or the drying of the printing rollers can be difficult.
- microemulsions used according to the invention generally contain 5 to 60, preferably 20 to 60% by weight of water-immiscible organic solvent and 20 to 80, preferably 30 to 60% by weight of water. All data in% by weight are based on the total weight of the finished microemulsion.
- microemulsion is thermodynamically stable in a certain temperature range.
- Preferred microemulsions are those which are thermodynamically stable at room temperature and below.
- the microemulsion is applied to the parts of the printing press to be cleaned.
- the surface of the printing ink is wetted quickly, uniformly and completely, so that the printing ink is quickly absorbed and dissolved or emulsified by the cleaning liquid.
- the remaining microemulsion residues can be easily removed by washing with water.
- the same applies to the ink residues remaining after printing has been interrupted on a printing form to be cleaned and preserved, in particular an offset or high-pressure form.
- the most important thing here is the complete removal of color residues from the non-image or background areas of the printing form, on which, for example in the case of flat or offset printing, the required hydrophilicity must be maintained when the printing process is resumed.
- a printing form is a print-ready printing plate which is generally obtained by exposing and developing a photosensitive printing plate.
- microemulsions used according to the invention are also suitable for cleaning other substances, e.g. B. of plastics, old paintwork, primers and bare metal sheets. You can e.g. B. can be used as a cleaning agent in the field of car refinishing and as a brush cleaner.
- Alkyl ether group 46 g of a C 8 -C 8 fatty acid methyl ester mixture, 37 g of water and 0.07 g of calcium chloride and brief shaking of the mixture gave a low viscosity, thermodynamically stable and visually transparent microemulsion.
- a microemulsion which is stable at room temperature was described as in Preparation 1, but from 8 g of dioctylsulfosuccinate, 16 g of the same polyglycol monoalkyl ether mixture, 15 g of rapeseed oil fatty acid methyl ester, 15 g of coconut fatty acid 2-ethylhexyl ester, 46 g of water and 0. 07 g calcium chloride produced.
- a microemulsion was obtained from 14 g of dioctyl sulfosuccinate, 34.5 g of soybean oil and 51.5 g of water by mixing as in Preparation Example 1. It was thermodynamically stable and visually transparent in the temperature range from 55 to 58 ° C.
- microemulsions of Preparation Examples 3 and 4 are not permanently stable outside the specified temperature ranges and separate into an oil and a water phase after long standing at room temperature.
- the microemulsions of Preparation Examples 1 and 2 permit use for an unlimited period at room temperature.
- Application example 5
- the rollers of a rotary offset printing machine were cleaned after every 100,000 prints with commercially available oil-based offset printing ink, once with white spirit (predominantly aliphatic hydrocarbons with a boiling range from 80 to 250 ° C.) and once with the microemulsion from preparation example 1.
- the cleaning performance i.e. the removal of the ink, essentially the same.
- the rollers were cleaner and drier after cleaning than when white spirit was used.
- the residues of the microemulsion could also be removed easily and without residue by simply rinsing with water.
- the offset printing plate used in the printing process was treated in the same way with both cleaning liquids. In both cases, a clean printing stencil, free of ink residues, was obtained.
- the printing form cleaned with the microemulsion was smoothly and completely wetted by the aqueous solution of gum arabic subsequently applied, while this solution was also accepted only with difficulty by the non-image-bearing carrier surface of the printing form cleaned with white spirit and only after prolonged intensive treatment.
Landscapes
- 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)
- Coloring (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19824236A DE19824236A1 (de) | 1998-05-29 | 1998-05-29 | Verfahren zum Reinigen von Druckmaschinen und Druckformen |
DE19824236 | 1998-05-29 | ||
PCT/EP1999/003479 WO1999062723A1 (de) | 1998-05-29 | 1999-05-20 | Verfahren zum reinigen von druckmaschinen und druckformen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1082228A1 true EP1082228A1 (de) | 2001-03-14 |
EP1082228B1 EP1082228B1 (de) | 2002-04-03 |
Family
ID=7869413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99925019A Expired - Lifetime EP1082228B1 (de) | 1998-05-29 | 1999-05-20 | Verfahren zum reinigen von druckmaschinen und druckformen |
Country Status (9)
Country | Link |
---|---|
US (1) | US6544348B1 (de) |
EP (1) | EP1082228B1 (de) |
JP (1) | JP4343435B2 (de) |
AT (1) | ATE215453T1 (de) |
AU (1) | AU746240B2 (de) |
CA (1) | CA2332584C (de) |
DE (2) | DE19824236A1 (de) |
DK (1) | DK1082228T3 (de) |
WO (1) | WO1999062723A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10258668A1 (de) * | 2002-12-13 | 2004-06-24 | Basf Ag | Verfahren zur Herstellung von Flexodruckformen mittels Lasergravur unter Verwendung von fotopolymeren Flexodruckelementen und fotopolymerisierbares Flexodruckelementen |
US7037882B2 (en) * | 2004-05-05 | 2006-05-02 | Bba Nonwovens Simpsonville, Inc. | Composition and material for cleaning printing machines |
US20060264350A1 (en) * | 2004-05-05 | 2006-11-23 | Bba Nonwovens Simpsonville Inc. | Printing blanket cleaning material |
EP1595940A1 (de) * | 2004-05-12 | 2005-11-16 | Malaysian Palm Oil Board | Hochleistungsreinigungsmittel |
DE102004025364A1 (de) | 2004-05-19 | 2005-12-08 | Basf Drucksysteme Gmbh | Verfahren zur Herstellung von Flexodruckformen mittels Laser-Direktgravur |
US20080287331A1 (en) * | 2007-05-18 | 2008-11-20 | Hai-Hui Lin | Low voc cleaning composition for cleaning printing blankets and ink rollers |
CN101434764B (zh) * | 2007-11-15 | 2010-12-01 | 中国石油化工股份有限公司 | 一种油墨清洗剂 |
ES2344668T3 (es) * | 2007-11-30 | 2010-09-02 | Agfa Graphics N.V. | Metodo para tratar una plancha de impresion litografica. |
ES2365885T3 (es) * | 2008-03-31 | 2011-10-13 | Agfa Graphics N.V. | Un método para tratar una plancha de impresión litográfica. |
WO2009137096A1 (en) * | 2008-05-09 | 2009-11-12 | Rhodia Inc. | Cleaning compositions incorporating green solvents and methods for use |
JP2010234554A (ja) * | 2009-03-30 | 2010-10-21 | Fujifilm Corp | 印刷版の作製方法 |
EP2513277B1 (de) * | 2009-12-16 | 2015-07-29 | Unilever N.V. | Bikontinuierliche mikroemulsionswaschmittelzusammensetzung |
EP2361963A1 (de) * | 2010-02-01 | 2011-08-31 | Unilever N.V. | Bikontinuierliche Mikroemulsions-Waschmittelzusammensetzung |
DE102015011694A1 (de) * | 2015-09-14 | 2017-03-16 | Forschungszentrum Jülich GmbH | Reinigungsmittel auf Mikroemulsionsbasis |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4100096A (en) | 1976-06-04 | 1978-07-11 | Addressograph Multigraph Corp. | Cleaner for hydrophilic metal surfaces of lithographic duplicators |
US4399243A (en) | 1980-12-12 | 1983-08-16 | Richardson Graphics Company | Cleaner and scratch remover composition |
DK533188D0 (da) | 1988-09-26 | 1988-09-26 | Aarhus Oliefabrik As | Anvendelse af (c1-c5) alkylestere af alifatiske (c8-c22) monocarboxylsyrer til afrensning af fedt, maling, trykfarver o.l. og rensemiddel indeholdendesaadanne estere |
US5380453A (en) * | 1988-09-26 | 1995-01-10 | Unichema Chemie B.V. | Composition comprising alkyl esters of aliphatic (C8 -C22) monocarboxylic acids and oil in water emulsifier |
GB9101850D0 (en) * | 1991-01-29 | 1991-03-13 | Du Pont Howson Ltd | Improvements in or relating to printing |
US5213624A (en) | 1991-07-19 | 1993-05-25 | Ppg Industries, Inc. | Terpene-base microemulsion cleaning composition |
DE4126719A1 (de) * | 1991-08-13 | 1993-02-18 | Baldwin Gegenheimer Gmbh | Nichtionisches fluessiges drucktuchwaschmittel fuer die maschinelle gummituchreinigung in offsetdruckmaschinen |
NZ264113A (en) * | 1993-08-04 | 1996-06-25 | Colgate Palmolive Co | Liquid crystal or microemulsion liquid cleaners containing esterified polyethoxyether nonionic surfactant, anionic surfactant, cosurfactant, optionally a fatty acid, and water-insoluble hydrocarbon or perfume |
-
1998
- 1998-05-29 DE DE19824236A patent/DE19824236A1/de not_active Withdrawn
-
1999
- 1999-05-20 JP JP2000551962A patent/JP4343435B2/ja not_active Expired - Fee Related
- 1999-05-20 WO PCT/EP1999/003479 patent/WO1999062723A1/de active IP Right Grant
- 1999-05-20 AT AT99925019T patent/ATE215453T1/de not_active IP Right Cessation
- 1999-05-20 EP EP99925019A patent/EP1082228B1/de not_active Expired - Lifetime
- 1999-05-20 DK DK99925019T patent/DK1082228T3/da active
- 1999-05-20 DE DE59901125T patent/DE59901125D1/de not_active Expired - Lifetime
- 1999-05-20 US US09/701,370 patent/US6544348B1/en not_active Expired - Fee Related
- 1999-05-20 AU AU41451/99A patent/AU746240B2/en not_active Ceased
- 1999-05-20 CA CA002332584A patent/CA2332584C/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9962723A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU746240B2 (en) | 2002-04-18 |
DE19824236A1 (de) | 1999-12-02 |
DK1082228T3 (da) | 2002-07-08 |
JP4343435B2 (ja) | 2009-10-14 |
CA2332584C (en) | 2007-11-20 |
WO1999062723A1 (de) | 1999-12-09 |
AU4145199A (en) | 1999-12-20 |
CA2332584A1 (en) | 1999-12-09 |
ATE215453T1 (de) | 2002-04-15 |
US6544348B1 (en) | 2003-04-08 |
EP1082228B1 (de) | 2002-04-03 |
DE59901125D1 (de) | 2002-05-08 |
JP2002516776A (ja) | 2002-06-11 |
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