EP2865532B1 - Agent d'humidification - Google Patents

Agent d'humidification Download PDF

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Publication number
EP2865532B1
EP2865532B1 EP13189797.7A EP13189797A EP2865532B1 EP 2865532 B1 EP2865532 B1 EP 2865532B1 EP 13189797 A EP13189797 A EP 13189797A EP 2865532 B1 EP2865532 B1 EP 2865532B1
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EP
European Patent Office
Prior art keywords
fountain
solutions
solution
concentrates
concentrate
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
EP13189797.7A
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German (de)
English (en)
Other versions
EP2865532A1 (fr
Inventor
Peter Wachtler
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.)
Lanxess Deutschland GmbH
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Lanxess Deutschland GmbH
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.)
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Publication date
Application filed by Lanxess Deutschland GmbH filed Critical Lanxess Deutschland GmbH
Priority to ES13189797.7T priority Critical patent/ES2581884T3/es
Priority to EP13189797.7A priority patent/EP2865532B1/fr
Publication of EP2865532A1 publication Critical patent/EP2865532A1/fr
Application granted granted Critical
Publication of EP2865532B1 publication Critical patent/EP2865532B1/fr
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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
    • B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development

Definitions

  • the present application provides biocidal dampening solutions and their concentrates, such as those used for offset printing.
  • a printing plate In offset printing, a printing plate is used which has substantially no height differences. Rather, the image and non-image areas of an offset printing plate have different wetting properties, ie hydrophobic and hydrophilic areas.
  • An offset printing plate usually comprises a support provided with a suitable hydrophobic coating. At the non-image areas, the photosensitive layer is removed so that the hydrophilic substrate is exposed. The hydrophobic areas of the printing plate are wettable with printing ink, the hydrophilic areas accordingly not. Further details of offset printing technology are, for example, the Rompp-Lexikon "Paints and Printing Inks", Georg Thieme Verlag, Stuttgart, New York 1998, pp. 167-170 refer to.
  • an offset printing plate is clamped onto the printing cylinder for the printing process.
  • the printing cylinder touch two other rollers, the so-called ink roller and the so-called dampening roller.
  • the ink roller By means of the ink roller, the ink is transferred to the printing plate, and by means of the dampening roller, the so-called fountain solution is applied to the plate surface.
  • the fountain solutions are typically a composition consisting essentially of water and additives.
  • the dampening solution has the task of producing a stable moisture film on the non-printing parts of the printing plate, which prevents the acceptance of the offset printing ink on these parts of the printing plate. It is irrelevant whether the dampening solution and then the color are applied during the application of dampening solution and ink on the printing plate with each revolution of the plate cylinder, or this is done in reverse order. From the impression cylinder, the imagewise applied ink is typically first printed on the so-called blanket cylinder and from there onto the paper.
  • the amount of dampening solution transferred can be controlled, for example via the speed of the Scoop roller in the dampening unit.
  • the dampening solution ensures the hydrophilization of the areas.
  • a color-water emulsion forms from the dampening solution and the printing ink.
  • the preparation of the ready-to-use dampening solution is advantageous and usual immediately before use in offset printing from appropriate fountain solution concentrates and water.
  • Dampening agent concentrates are usually concentrated aqueous solutions, but occasionally also solid, powder, tablet or pasty products which contain the additives required for dampening solution in offset printing. From these concentrates, the ready-to-use dampening solution is prepared by diluting with or dissolving the concentrates in water.
  • Such fountain solution can be attacked during storage and use of the printing press of microorganisms such as bacteria, mold, yeasts and algae and thereby converted into a no longer suitable for use form.
  • microbiological deterioration of dampening solutions is manifested by bad odor, pH changes, discoloration, precipitation, increased corrosiveness and similar effects that reduce the quality of the products.
  • Proper use of such products is then no longer possible, with the result that they must be disposed of properly. If microbiological decomposition occurs when the dampening solution is used in the printing machine, this can lead to process interruptions and thus to downtime.
  • isothiazolinones in particular the 3: 1 mixture of chloromethylisothiazolinone and methylisothiazolinone (CMIT / MIT).
  • CMIT / MIT chloromethylisothiazolinone
  • JP 2959663 B discloses a dampening solution containing a biguanidinium salt.
  • dampening solutions of a composition known per se have virtually no microbiological infestation any more if they contain n-dodecylguanidinium acetate or n-dodecylguanidinium chloride as the N-alkyl-guanidinium salt. It is surprising that already amounts of 1000 ppm or less in ready-to-use dampening solutions are sufficient to accomplish the good protective effect.
  • N-alkyl-guanidinium salts are for example US 6,890,969 where they are described for the stabilization of polymer emulsions.
  • the invention therefore dampening and fountain solution concentrates containing at least one N-alkyl-guanidinium salt, which is n-Dodecylguanidiniumacetat or n-Dodecylguanidiniumchlorid.
  • N-alkyl-guanidinium salts are generally understood to mean compounds which have at least one guanidinium group or biguanide group which have at least one of their nitrogen atoms an alkyl radical or compounds in which in each case two groups selected from guanidinium groups and biguanide groups via at least one of them Nitrogen atoms are linked via an alkylene radical. Examples of compounds of the latter type include chlorhexidine and polyhexanide.
  • Compounds of the formula (I) used according to the invention are n-dodecylguanidinium acetate and n-dodecylguanidinium chloride.
  • the application concentration of these compounds in the ready-to-use dampening solution depends on the type and occurrence of the microorganisms to be controlled, the initial microbial load, e.g. the typically used for dilution of fountain solution concentrates water, as well as after the composition of the dampening solution to be protected.
  • the optimum amount of use can be easily determined prior to practical use by testing in the laboratory in a manner well known to those skilled in the art.
  • 10 to 5000, preferably 50 to 2000, more preferably 100 to 1500 and particularly preferably 100 to 1000 ppm of N-alkyl-guanidinium salts are used in the ready-to-use dampening solutions.
  • the water content in the ready-to-use dampening solution is, for example, 95.0 to 99.7% by weight, preferably 98.0 to 99.7% by weight.
  • the remainder to 100.0 wt .-% form the or the N-alkyl guanidinium salts, the pH regulators and optionally further added substances.
  • the ready-to-use dampening solution preferably has a pH under standard conditions of from 3 to 9, preferably from 3.0 to 6.0 and particularly preferably from 4.0 to 5.5.
  • pH regulators include, for example, buffer substances or buffer systems, or depending on the desired pH also acids and bases.
  • Preferred acids are phosphoric acid or organic acids, such as. Citric, ascorbic, sulphanilic, tartaric, lactic and acetic acid, with citric acid being preferred because of its buffering capacity.
  • the acids mentioned may preferably be used to form buffer systems, the corresponding alkali metal salts of these acids, particularly preferably the sodium, potassium and lithium salts or corresponding bases which neutralize a portion of the acid.
  • the dampening solutions according to the invention may additionally contain either none, one or more active substances as further biocides.
  • these other biocides may be selected from the group consisting of bronopol, benzylhemiformal, trimethylene-2-methylisothiazolinone-3-one, N-methylbenzisothiazolinone, 2-n-octylisothiazolin-3-one, tetramethylolacetylenediurea (TMAD), 1,3 Bis (hydroxymethyl) -5,5-dimethylimidazolidine-2,4-dione (DMDMH), p-chloro-m-cresol, dimethylolurea, 1,2-dibromo-2,4-dicyanobutane, 2,2-dibromo-3 nitrilopropionic acid amide, glutaric dialdehyde, ethylene glycol hemiformal, sodium pyrithione, 2-phenoxyethanol, phenoxypropanol, o-pheny
  • the fountain solutions of the invention are characterized by high microbial stability, which can avoid the disadvantages mentioned above.
  • the invention furthermore relates to fountain solution concentrates as defined in claim 9, from which the ready-to-use dampening solution is obtainable by adding water and consequently may contain the same components or not as described above for the ready-to-use dampening solution.
  • the formulation of the fountain solution concentrates according to the invention is arbitrary and can be carried out, for example, in the form of solutions, pastes, granules or tablets.
  • the fountain solution treated water preferably demineralized or water with a total hardness of 2.14 mmol / l or less such as 1.42 to use 2.14 mmol / l.
  • N-alkyl-guanidinium salts required for microbiological stabilization and optionally further biocides may also be added to the dampening solutions of conventional composition directly before use in the printing process. Therefore, the invention also includes the use of N-alkyl-guanidinium salts for the production of dampening solutions as defined in claim 11, in particular for offset printing.
  • a microbiological stress test was used to test the susceptibility of water-based systems to microbial attack and the effects of preservatives.
  • the ready-to-use dampening solution (2.5% aqueous dilution) was admixed with the amounts of N-dodecylguanidinium hydrochloride (DGH) indicated in Table 1 (commercial solution of DGH with 35% by weight active ingredient content dissolved in a dipropylene glycol / propylene glycol mixture, N -2000 Antimicrobial from LANXESS, eg 0.1% by weight N-2000 antimicrobial for 350 ppm DGH).
  • DGH N-dodecylguanidinium hydrochloride
  • a microbiologically stable dampening solution can be obtained by addition of only 350 ppm DGH or 0.1% by weight N-2000 antimicrobial, which also withstands several massive contamination cycles.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Claims (12)

  1. Agents d'humidification ou concentrés d'agents d'humidification, contenant au moins
    - au moins un régulateur de pH,
    - au moins un sel de N-alkyl-guanidinium,
    les agents d'humidification contenant obligatoirement, les concentrés d'agents d'humidification éventuellement, également
    - de l'eau, caractérisés en ce que de l'acétate de n-dodécylguanidinium ou du chlorure de n-dodécylguanidinium est utilisé en tant que sel de N-alkyl-guanidinium.
  2. Agents d'humidification ou concentrés d'agents d'humidification selon la revendication 1, caractérisés en ce que des substances tampons, des systèmes tampons, des acides ou des bases sont utilisés en tant que régulateurs de pH.
  3. Agents d'humidification ou concentrés d'agents d'humidification selon l'une quelconque des revendications 1 à 2, caractérisés en ce qu'ils contiennent à chaque fois en outre ou ne contiennent à chaque fois pas, selon toutes les permutations envisageables :
    - au moins une substance hydrophile filmogène,
    - au moins une substance tensioactive,
    - au moins un agent mouillant,
    - au moins un solvant organique,
    - au moins un agent de durcissement,
    - au moins un agent antimousse,
    - au moins un inhibiteur de corrosion,
    - au moins un accélérateur de séchage.
  4. Agents d'humidification ou concentrés d'agents d'humidification selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'ils contiennent à chaque fois :
    - au moins une substance hydrophile filmogène,
    - au moins un solvant organique.
  5. Agents d'humidification ou concentrés d'agents d'humidification selon l'une quelconque des revendications 1 à 4, caractérisés en ce qu'ils contiennent en outre aucun, un ou plusieurs biocides, qui sont de préférence choisis dans le groupe constitué par le bronopol, le benzylhémiformal, la triméthylène-2-méthylisothiazolinon-3-one, la N-méthyl-benzisothiazolinone, la 2-n-octylisothiazolin-3-one, la tétraméthylolacétylène-diurée (TMAD), la 1,3-bis(hydroxyméthyl)-5,5-diméthylimidazolidine-2,4-dione (DMDMH), le p-chloro-m-crésol, la diméthylolurée, le 1,2-dibromo-2,4-dicyanobutane, l'amide de l'acide 2,2-dibromo-3-nitrilopropionique, le glutardialdéhyde, l'éthylèneglycolhémiformal, la pyrithione de sodium, le 2-phénoxyéthanol, le phénoxypropanol, l'o-phényl-phénol, le chlorophène et les sels d'ammonium quaternaires.
  6. Agents d'humidification selon l'une quelconque des revendications 1 à 5, caractérisés en ce qu'ils contiennent 10 à 5 000, de préférence 50 à 2 000, de manière particulièrement préférée 100 à 1 500 et de manière particulièrement préférée 100 à 1 000 ppm de sels de N-alkyl-guanidinium.
  7. Agents d'humidification selon l'une quelconque des revendications 1 à 6, caractérisés en ce que la teneur en eau est de 95,0 à 99,7 % en poids, de préférence de 98,0 à 99,7 % en poids.
  8. Agents d'humidification selon l'une quelconque des revendications 1 à 7, caractérisés en ce que le pH en conditions standards est de 3 à 9, de préférence de 3,0 à 6,0 et de manière particulièrement préférée de 4,0 à 5,5.
  9. Concentré d'agent d'humidification, à partir duquel les agents d'humidification selon l'une quelconque des revendications 1 à 8 peuvent être obtenus par dilution avec de l'eau.
  10. Procédé pour éviter ou réduire les destructions de produits ou les perturbations de procédés causées par des microorganismes sur des machines d'impression offset, caractérisé en ce que des agents d'humidification selon les revendications 1 à 8 sont utilisés en tant qu'agents d'humidification.
  11. Utilisation de sels de N-alkyl-guanidinium pour la fabrication d'agents d'humidification ou de concentrés d'agents d'humidification, notamment pour l'impression offset, caractérisée en ce que de l'acétate de n-dodécylguanidinium ou du chlorure de n-dodécylguanidinium est utilisé en tant que sel de N-alkyl-guanidinium.
  12. Utilisation selon la revendication 11, caractérisée en ce que les agents d'humidification sont ceux selon l'une quelconque des revendications 1 à 8 et les concentrés d'agents d'humidification sont ceux selon l'une quelconque des revendications 1 à 5.
EP13189797.7A 2013-10-23 2013-10-23 Agent d'humidification Active EP2865532B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES13189797.7T ES2581884T3 (es) 2013-10-23 2013-10-23 Agente humectante
EP13189797.7A EP2865532B1 (fr) 2013-10-23 2013-10-23 Agent d'humidification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13189797.7A EP2865532B1 (fr) 2013-10-23 2013-10-23 Agent d'humidification

Publications (2)

Publication Number Publication Date
EP2865532A1 EP2865532A1 (fr) 2015-04-29
EP2865532B1 true EP2865532B1 (fr) 2016-04-27

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ID=49552160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13189797.7A Active EP2865532B1 (fr) 2013-10-23 2013-10-23 Agent d'humidification

Country Status (2)

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EP (1) EP2865532B1 (fr)
ES (1) ES2581884T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238244A (en) * 1989-11-21 1991-05-29 Yoshitomi Pharmaceutical Industrial microbicidal/microbistatic composition containing an n-alkylguanidin and 4,5-dichloro-1,2-dithiol-3-one
JP2959663B2 (ja) * 1994-06-29 1999-10-06 ソマール株式会社 湿し水組成物
MXPA01008719A (es) 2000-09-06 2002-04-10 Air Products Polymers Lp Conservacion de emulsiones polimericas usando compuestos cationicos.
AU2003210557A1 (en) * 2002-01-17 2003-09-02 Verichem, Inc. Synergistic mixtures of o-phenylphenol and other microbiocides

Also Published As

Publication number Publication date
ES2581884T3 (es) 2016-09-08
EP2865532A1 (fr) 2015-04-29

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