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WO1998051512A1 - Agent d'humidification pour l'impression offset - Google Patents

Agent d'humidification pour l'impression offset

Info

Publication number
WO1998051512A1
WO1998051512A1 PCT/EP1998/002776 EP9802776W WO9851512A1 WO 1998051512 A1 WO1998051512 A1 WO 1998051512A1 EP 9802776 W EP9802776 W EP 9802776W WO 9851512 A1 WO9851512 A1 WO 9851512A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
water
soluble
solution according
molybdenum compound
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.)
Ceased
Application number
PCT/EP1998/002776
Other languages
German (de)
English (en)
Inventor
Wolfgang Rauh
Stefan Dietzel
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.)
DC Druck Chemie GmbH
Original Assignee
DC Druck Chemie 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.)
Filing date
Publication date
Application filed by DC Druck Chemie GmbH filed Critical DC Druck Chemie GmbH
Priority to AU79115/98A priority Critical patent/AU7911598A/en
Publication of WO1998051512A1 publication Critical patent/WO1998051512A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B41N3/08—Damping; Neutralising or similar differentiation treatments for lithographic printing formes; Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
    • C23F11/185—Refractory metal-containing compounds

Definitions

  • the invention relates to a dampening solution for offset printing with a corrosion inhibitor.
  • a printing plate designed as a flat plate which can consist of anodized aluminum and has essentially no or only very slight differences in height. Image and non-image areas of this printing form have different wetting properties, which is used for the actual printing process. It is generally known that a printed image for offset printing can be made using various reproduction processes, according to which the non-image areas on the printing plate become hydrophilic, whereas the image areas become hydrophobic. The parts of the light-sensitive layer are usually removed at the non-image points.
  • an aqueous moistening solution is applied to the plate surface by at least one roller or by a spray device during the printing process.
  • at least one ink roller covered with an oil-based ink is brought into contact with the printing form.
  • the printing ink is transferred image-wise only to the hydrophobic parts of the printing plate, whereupon this printing ink applied image-wise onto a so-called printing blanket (a high-strength, provided with a special rubber mixture on the surface Fabric) transferred and then applied by this to the printing paper.
  • a so-called printing blanket a high-strength, provided with a special rubber mixture on the surface Fabric
  • the individual steps namely the application of the dampening solution, the application of the printing ink, the application of the printing ink to a printing blanket and the transfer of the printing ink to the printing paper, have to be carried out with each roller revolution and the correspondingly short contact time with the corresponding solutions done stably.
  • the pH stability should be ensured in a pH range of approximately 4 to 6.5 of the aqueous dampening solution, since the printing process generally has its maximum stability at these pH values; emulsification of small, but as constant as possible amounts of water in the printing ink should be made possible;
  • the drying of the ink should not be delayed, but rather accelerated.
  • Buffer systems for which polycarboxylic acids or polyhydroxycarboxylic acids and their salts are usually used the most common buffer systems being the generally known citrate or phosphate buffers;
  • Fungicides for preventing fungal attack Fungicides for preventing fungal attack
  • Corrosion inhibitors to avoid corrosion on the metallic materials used for the construction of the printing press.
  • EP-B-0 219 719 it is known from EP-B-0 219 719 to use organic zinc salts, such as zinc gluconate and zinc glucoheptonate, water-soluble inorganic polyphosphates, phenylarsonic acid and derivatives thereof, propargyl compounds, thiourea and its derivatives.
  • organic zinc salts such as zinc gluconate and zinc glucoheptonate
  • water-soluble inorganic polyphosphates such as zinc gluconate and zinc glucoheptonate
  • phenylarsonic acid and derivatives thereof propargyl compounds
  • thiourea and its derivatives propargyl compounds
  • the invention is based on the object of creating a dampening solution for offset printing which is further improved compared to the dampening solution according to the last-mentioned proposal (German patent application No. 197 05 561.3) in such a way that the mass removal rates due to corrosion are even more noticeable can be reduced.
  • the corrosion inhibitor contained in the dampening solution is essentially formed by a water-soluble molybdenum compound.
  • this dampening solution according to the invention enables optimum corrosion protection to be achieved, the use of a water-soluble molybdenum compound as the corrosion inhibitor according to the invention having the already relatively good corrosion protection effect of the proposal according to the German patent application No.197 05 561.3 can still be significantly improved.
  • This solution according to the invention offers the possibility of combining an optimized combination of already passivating buffers with a corrosion inhibitor and thus noticeably reducing the mass removal rates due to corrosion compared to all known systems.
  • this water-soluble molybdenum compound as a corrosion inhibitor, it is further preferred if at least one further component formed by a salt of an inorganic acid is added in order to increase the corrosion protection effect.
  • At least one further component formed by a phosphate compound can also be added to the water-soluble molybdenum compound.
  • the content of phosphate compounds is about 0.01 to 1.5% by weight.
  • a further component in the form of a water-soluble boron compound can also be added to the water-soluble molybdenum compound.
  • water-soluble boron compounds for example boric acid, metaboric acid or polyboric acids or their salts in the order of magnitude specified above can be added to the water-soluble molybdenum compound and thus to the dampening solution.
  • the corrosion-inhibited dampening solution according to the invention it can be particularly advantageous if at least one further component is added to the water-soluble molybdenum compound, which consists of a water-soluble boron compound and / or a phosphate compound, and is provided in a combination such that the maximum Corrosion protection effect is in a pH range of about 4 to 8.5.
  • the water-soluble molybdenum compound which consists of a water-soluble boron compound and / or a phosphate compound
  • the corrosion inhibitor is essentially formed by a water-soluble molybdenum compound.
  • This molybdenum compound can, above all or preferably, be a water-soluble molybdate.
  • a water-soluble molybdate can preferably be introduced in the form of sodium molybdate, sodium dimolybdate, sodium thiolybdate or ammonium molybdate. It is advisable to provide a content of about 0.002 to 1.5% by weight of water-soluble molybdate.
  • the dampening solution according to the invention preferably also contains at least one of the following further constituents:
  • an organic substance an acid, a surfactant and a water-soluble alcohol or glycol or glycol ether.
  • Citric acid 0.19% by weight glycerin 0.45% by weight non-ionic surfactant 0.03% by weight
  • Fungicide 0.003% by weight sodium molybdate 0.004% by weight
  • Fungicide 0.003% by weight sodium molybdate 0.005% by weight
  • Citric acid 0.25% by weight
  • Glycerin 0.45% by weight non-ionic surfactant 0.03% by weight bactericide 0.01% by weight
  • the area-related mass loss rate from long-term immersion tests is usually used. This is the mass loss ⁇ m of a metal sample (given in mg / cm 2 ) that is immersed in the aerated and stirred dampening solution over a period of 28 days.
  • the area-related mass loss rate can also be carried out by means of electrochemical corrosion measurements from the polarization resistance R—, where:
  • R_ denotes the increase in the tangent of the current density-potential curve at the free corrosion potential U corr .
  • the material-typical proportionality constant K is determined empirically by measuring both the area-related mass loss rate and the polarization resistance for a number of liquid media. Measurements of the area-related mass loss rate for the steel 100 Cr 6 frequently used in printing machines, the value for K was
  • Example 2 the water-soluble molybdenum compound was combined with commercially available citrate / phosphate buffers, while the corrosion inhibitor in Example 1 consisted of a triazole, which was usually used.
  • a water-soluble borate compound was combined with sodium molybdate as an essential corrosion inhibitor.
  • Examples 9 to 12 sodium molybdate as a water-soluble molybdenum compound was combined with a water-soluble boron compound and a phosphate compound in the manner according to the invention. This combination is selected in such a way that a buffer system is also formed at the same time, which has its optimal corrosion protection effect in the pH range from about 4 to 8.5, preferably between 4.5 and 5.5.
  • the removal rates of these examples 9 to 12 are many times lower than the removal rates for the dampening solutions according to the prior art mentioned at the beginning. It has surprisingly been found that these removal rates, compared to the already very good corrosion protection effect of the older proposal according to German patent application No. 197 05 561.3, still gave a significant improvement.
  • a further increase in the corrosion protection effect compared to the known corrosion inhibitor-buffer combination is achieved by the addition according to the invention of a water-soluble molybdenum compound as an essential corrosion inhibitor in the dampening solution.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

L'invention concerne un agent d'humidification pour l'impression offset, contenant un inhibiteur de corrosion. Les vitesses d'enlèvement de masse dû à la corrosion sont nettement abaissées par le fait que l'inhibiteur de corrosion est constitué essentiellement d'un composé de molybdène hydrosoluble.
PCT/EP1998/002776 1997-05-13 1998-05-12 Agent d'humidification pour l'impression offset Ceased WO1998051512A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU79115/98A AU7911598A (en) 1997-05-13 1998-05-12 Wetting agent for offset printing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997119936 DE19719936A1 (de) 1997-05-13 1997-05-13 Feuchtmittel für den Offsetdruck
DE19719936.4 1997-05-13

Publications (1)

Publication Number Publication Date
WO1998051512A1 true WO1998051512A1 (fr) 1998-11-19

Family

ID=7829286

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/002776 Ceased WO1998051512A1 (fr) 1997-05-13 1998-05-12 Agent d'humidification pour l'impression offset

Country Status (3)

Country Link
AU (1) AU7911598A (fr)
DE (1) DE19719936A1 (fr)
WO (1) WO1998051512A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016173975A1 (fr) 2015-04-28 2016-11-03 Sicpa Holding Sa Solution de mouillage écologique pour processus d'impression offset humide, et processus d'impression offset humide
WO2017001666A1 (fr) 2015-07-01 2017-01-05 Sicpa Holding Sa Solution de mouillage et encre écologiques destiné à un procédé d'impression offset humide, et procédé d'impression offset humide

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004057294A1 (de) 2004-11-26 2006-06-01 Basf Drucksysteme Gmbh Verwendung von Polymeren, welche mit Säuregruppen modifizierte Aminogruppen aufweisen, zur Herstellung von Feuchtmitteln oder Feuchtmittelkonzentraten sowie in Feuchtmittelumläufen für den Offsetdruck

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1252091A (fr) * 1968-04-13 1971-11-03
GB2008495A (en) * 1977-11-16 1979-06-06 Mitsubishi Paper Mills Ltd Composition for treating lithographic printing plates
US4282811A (en) * 1977-02-22 1981-08-11 Ricoh Co., Ltd. Method for desensitizing offset printing plates
EP0219719A1 (fr) * 1985-10-12 1987-04-29 DS-Druckerei Service Composition de mouillage pour l'impression lithographique
DE3800359A1 (de) * 1987-01-08 1988-07-21 Fuji Photo Film Co Ltd Verfahren zur herstellung einer lithographischen druckplatte
DE3803160A1 (de) * 1987-02-04 1988-08-18 Fuji Photo Film Co Ltd Gummierverfahren
EP0441502A2 (fr) * 1990-02-09 1991-08-14 Fuji Photo Film Co., Ltd. Composition de finissage pour plaque lithographique
GB2263255A (en) * 1992-01-15 1993-07-21 Du Pont Fount solution for lithographic printing
EP0701909A1 (fr) * 1994-09-16 1996-03-20 Du Pont (UK) Limited Solutions de mouillage pour impression
DE19705561A1 (de) * 1997-02-13 1998-08-20 Fogra Forschungsgesellschaft D Feuchtmittel für den Offsetdruck

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1079053A (fr) * 1977-04-04 1980-06-10 Noranda Mines Limited Preparation d'un pigment de molybdate inhibant la corrosion
US4349457A (en) * 1980-03-10 1982-09-14 The Dow Chemical Co. Corrosion protection for metal surfaces
US4459155A (en) * 1981-01-10 1984-07-10 The British Petroleum Company Limited Method of producing corrosion inhibitors
AU562417B2 (en) * 1983-04-13 1987-06-11 W.R. Grace & Co. Phosphate or molybdate anti-corrosive compositions
KR910003915B1 (ko) * 1988-01-27 1991-06-15 한국과학기술원 자동차 방열기용 부동액 조성물
FR2627511B1 (fr) * 1988-02-18 1993-07-09 Gaz De France Inhibiteurs de corrosion des aciers et compositions aqueuses d'halogenure de metal alcalin les contenant
US4798683A (en) * 1988-04-21 1989-01-17 Calgon Corporation Method for controlling corrosion using molybdate compositions
CA2186648C (fr) * 1989-10-23 2002-04-02 Ahmed Sharaby Composition polymerique liquide a base d'un sel d'ammonium d'acide phosphorique ou phosphoreux, empechant la corrosion des metaux en contact avec l'eau salee; methode d'utilisation
US5415805A (en) * 1994-02-25 1995-05-16 Betz Laboratories, Inc. Corrosion inhibitor composition and method of use

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1252091A (fr) * 1968-04-13 1971-11-03
US4282811A (en) * 1977-02-22 1981-08-11 Ricoh Co., Ltd. Method for desensitizing offset printing plates
GB2008495A (en) * 1977-11-16 1979-06-06 Mitsubishi Paper Mills Ltd Composition for treating lithographic printing plates
EP0219719A1 (fr) * 1985-10-12 1987-04-29 DS-Druckerei Service Composition de mouillage pour l'impression lithographique
DE3800359A1 (de) * 1987-01-08 1988-07-21 Fuji Photo Film Co Ltd Verfahren zur herstellung einer lithographischen druckplatte
DE3803160A1 (de) * 1987-02-04 1988-08-18 Fuji Photo Film Co Ltd Gummierverfahren
EP0441502A2 (fr) * 1990-02-09 1991-08-14 Fuji Photo Film Co., Ltd. Composition de finissage pour plaque lithographique
GB2263255A (en) * 1992-01-15 1993-07-21 Du Pont Fount solution for lithographic printing
EP0701909A1 (fr) * 1994-09-16 1996-03-20 Du Pont (UK) Limited Solutions de mouillage pour impression
DE19705561A1 (de) * 1997-02-13 1998-08-20 Fogra Forschungsgesellschaft D Feuchtmittel für den Offsetdruck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016173975A1 (fr) 2015-04-28 2016-11-03 Sicpa Holding Sa Solution de mouillage écologique pour processus d'impression offset humide, et processus d'impression offset humide
WO2017001666A1 (fr) 2015-07-01 2017-01-05 Sicpa Holding Sa Solution de mouillage et encre écologiques destiné à un procédé d'impression offset humide, et procédé d'impression offset humide
US10590292B2 (en) 2015-07-01 2020-03-17 Sicpa Holding Sa Environmentally friendly ink and fountain solution for wet offset printing process and wet offset printing process

Also Published As

Publication number Publication date
DE19719936A1 (de) 1998-11-19
AU7911598A (en) 1998-12-08

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