EP0358113A2 - Solution de mouillage pour l'impression offset - Google Patents

Solution de mouillage pour l'impression offset Download PDF

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Publication number
EP0358113A2
EP0358113A2 EP89116098A EP89116098A EP0358113A2 EP 0358113 A2 EP0358113 A2 EP 0358113A2 EP 89116098 A EP89116098 A EP 89116098A EP 89116098 A EP89116098 A EP 89116098A EP 0358113 A2 EP0358113 A2 EP 0358113A2
Authority
EP
European Patent Office
Prior art keywords
acid
solution according
dampening solution
fountain solution
triazole
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
Application number
EP89116098A
Other languages
German (de)
English (en)
Other versions
EP0358113B1 (fr
EP0358113A3 (en
Inventor
Loni Schell
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Priority to AT89116098T priority Critical patent/ATE101364T1/de
Publication of EP0358113A2 publication Critical patent/EP0358113A2/fr
Publication of EP0358113A3 publication Critical patent/EP0358113A3/de
Application granted granted Critical
Publication of EP0358113B1 publication Critical patent/EP0358113B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 invention relates to a dampening solution or a dampening solution for use in offset printing.
  • the pH range which is most favorable for printing is between 4.7 and 5.3 and is normally achieved by buffer substances such as e.g. B. citric acid / citrate maintained.
  • buffer substances such as e.g. B. citric acid / citrate maintained.
  • Sal ze from polycarboxylic acids and organic bases, such as amines.
  • the dampening solutions used so far show signs of corrosion on the printing presses, particularly the plate and blanket cylinders with nickel plating are affected, which can result in considerable downtimes and repair costs.
  • DE-A 35 36 485 describes a dampening solution which contains copper ions in addition to the usual constituents water, viscosity-increasing substances, buffers based on citric acid, surfactants and fungicides to reduce the signs of corrosion.
  • This dampening solution can reduce the nickel removal as long as copper ions are present.
  • the copper deposits as an electrochemically noble metal on the less common, commonly used aluminum carrier, which can lead to toning during printing; furthermore, the copper ions, which are only present in small quantities, are removed from the fountain solution and are therefore lost to the corrosion protection.
  • EP-A 0 108 883 describes a method for avoiding corrosion on printing press cylinders, wherein 1 H-benzotriazole is added to the dampening solution as a corrosion inhibitor.
  • the pH should be kept at 5.5 and higher.
  • the task was to provide a dampening solution with which one can work in the pH range from 4.7 to 5.3, which guarantees corrosion inhibition, particularly in the long term, and which does not reduce the printing quality of the aluminum printing plates.
  • a dampening solution for offset printing containing viscosity-regulating hydrophilizing agents, buffer substances and optionally solubilizers, wetting agents, defoamers and biocides, the characteristic feature of which is that it is a combination of at least one triazole and at least one non-hydroxylated dicarboxylic acid and optionally contains their salts.
  • Suitable triazoles are e.g. B. aromatically substituted triazoles and those containing electron donors. 1 H-Benzotriazole and tolyltriazole are preferred. Tolyltriazole is particularly preferred.
  • Combinable dicarboxylic acids and their salts in the sense of the invention can be aliphatic or aromatic.
  • Dicarboxylic acids with 4 to 10 carbon atoms are particularly suitable. Z are preferred.
  • the triazoles are used in a ratio of approximately 2: 1 to 1:20 with the dicarboxylic acids, preferably 1: 1 to 1:10.
  • the mixture is added so much that it contains 0.3 to 5% by weight of triazole and 1 to 15% by weight, preferably 2 to 10% by weight, of dicarboxylic acid.
  • Solubilizers can be used to dissolve triazole and dicarboxylic acids in the fountain solution used.
  • the dampening solution normally contains hydrophilic thickeners suitable for adjusting the viscosity important for printing and for forming a protective layer when the machine is at a standstill, e.g. modified starch or cellulose, polyols, polyglycols or similar substances commonly used for this purpose.
  • Other additives which improve the printing properties can also be used, e.g. B. solvents, sequestering agents, surfactants, preferably in non-ionic form, wetting agents, defoamers, biocides, etc.
  • Ammonium salts of the general formula R n H m N+X ⁇ are preferably added to the dampening solution, where n 1-4, m 0-3, (n + m) 4 and R is alkyl and / or aryl, but preferably alkyl.
  • the anion is preferably from derived from a carboxylic acid. In this embodiment, the corrosion-reducing effect is particularly evident, particularly over a longer period of time.
  • the non-hydroxylated dicarboxylic acids with their salts and / or other weak acids and / or their salts are used for buffer formation.
  • Such acids are in particular monocarboxylic acids or inorganic acids.
  • a corrosion inhibitor for iron is added to the dampening solution in cases where this additional protection is desired or is unavoidable.
  • phosphoric acids such as orthophosphoric acid or polyphosphoric acid and / or their salts, has proven particularly useful here.
  • Orthophosphoric acid is preferably used.
  • the dampening solution is offered to the user in solid, semi-solid or moist-pasty form, which he then dilutes with the appropriate amount of partially or fully demineralized water.
  • the fountain solution used in printing in the machines usually contains 0.5 to 5.0% by weight, preferably 1.0 to 3% by weight, of the fountain solution according to the invention.
  • the tests were therefore carried out on nickel-plated test sheets with a surface area of 58 cm2, whereby they were alternately exposed to the air (70 times at room temperature) and the dampening solution to be tested (70 times at 20 ° C) within one minute.
  • the nickel layer thickness was 50 ⁇ m.
  • the respective fountain solution was renewed every 2.75 hours. Any loose deposits on the sheet were removed, then the sheet was rinsed with distilled water and with alcohol, dried and the weight loss compared to the untreated sheet was determined at room temperature.
  • the components are given in parts by weight in the examples.
  • the dicarboxylic acids were used in comparable molar amounts.
  • the corrosion comes to a standstill after a short time, while in the comparative examples 1 and 2 the corrosion increases continuously.
  • the corrosion of comparative examples 1 and 2 - extrapolated to days or weeks, as is to be done in practice - is ten orders of magnitude higher than that of the invention.
  • the invention provides improved dampening solutions for printing practice. They have a very good buffering capacity and provide even moistening with low water requirements.
  • the freewheel behavior is very good, the amount of waste is low. There is no smearing, sticking or foaming.
  • the corrosion protection for nickel is very good, and iron corrosion when phosphoric acid and / or phosphates are added is also greatly reduced.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
EP89116098A 1988-09-08 1989-08-31 Solution de mouillage pour l'impression offset Expired - Lifetime EP0358113B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89116098T ATE101364T1 (de) 1988-09-08 1989-08-31 Feuchtmittel fuer den offsetdruck.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830467 1988-09-08
DE3830467A DE3830467A1 (de) 1988-09-08 1988-09-08 Feuchtmittel fuer den offsetdruck

Publications (3)

Publication Number Publication Date
EP0358113A2 true EP0358113A2 (fr) 1990-03-14
EP0358113A3 EP0358113A3 (en) 1990-09-26
EP0358113B1 EP0358113B1 (fr) 1994-02-09

Family

ID=6362490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116098A Expired - Lifetime EP0358113B1 (fr) 1988-09-08 1989-08-31 Solution de mouillage pour l'impression offset

Country Status (8)

Country Link
US (1) US5096487A (fr)
EP (1) EP0358113B1 (fr)
JP (1) JPH02107491A (fr)
AT (1) ATE101364T1 (fr)
AU (1) AU617001B2 (fr)
BR (1) BR8904483A (fr)
DE (2) DE3830467A1 (fr)
FI (1) FI894203L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482893A1 (fr) * 1990-10-25 1992-04-29 Fuji Photo Film Co., Ltd. Composition pour solution de mouillage pour l'impression lithographique et procédé pour l'impression lithographique
EP2098377A3 (fr) * 2008-03-07 2010-03-10 FUJIFILM Corporation Composition de solution de fontaine pour impression lithographique et dispositif d'impression rotative à décalage thermofixé

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366784A (en) * 1991-02-26 1994-11-22 Herbison Paul R Corrosion inhibiting offset printing blanket
JP3482561B2 (ja) * 2001-05-22 2003-12-22 株式会社サンライズカンパニー オフセット印刷用適正水及び湿し水
CN104070875B (zh) * 2014-07-05 2016-06-15 安徽索亚装饰材料有限公司 一种高速轮转胶印润版液及其制备方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186810A (ja) * 1982-04-26 1983-10-31 Nec Corp 宇宙船速度決定装置
DE3242104C1 (de) * 1982-11-13 1985-08-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Verwendung eines Zusatzes zum Korrosionsschutz von Druckzylinderoberflaechen
US4548645A (en) * 1983-12-21 1985-10-22 Inmont Corporation Lithographic water based fountain solution concentrates
DE3536485A1 (de) * 1985-10-12 1987-04-16 Merck Patent Gmbh Feuchtmittel fuer den offsetdruck
US4647392A (en) * 1985-12-27 1987-03-03 Texaco Inc. Monobasic-dibasic acid/salt antifreeze corrosion inhibitor
JPS62218190A (ja) * 1986-03-20 1987-09-25 Fuji Photo Film Co Ltd 平版印刷用処理液
US4764213A (en) * 1986-06-16 1988-08-16 Hoechst Celanese Corporation Lithographic fountain solution containing mixed colloids
CA1305296C (fr) * 1986-07-02 1992-07-21 Robert Bassemir Solutions de mouillage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482893A1 (fr) * 1990-10-25 1992-04-29 Fuji Photo Film Co., Ltd. Composition pour solution de mouillage pour l'impression lithographique et procédé pour l'impression lithographique
US5165344A (en) * 1990-10-25 1992-11-24 Fuji Photo Film Co., Ltd. Dampening water composition for lithographic printing and method for lithographic printing
EP2098377A3 (fr) * 2008-03-07 2010-03-10 FUJIFILM Corporation Composition de solution de fontaine pour impression lithographique et dispositif d'impression rotative à décalage thermofixé

Also Published As

Publication number Publication date
FI894203A7 (fi) 1990-03-09
US5096487A (en) 1992-03-17
EP0358113B1 (fr) 1994-02-09
EP0358113A3 (en) 1990-09-26
DE58906930D1 (de) 1994-03-24
AU617001B2 (en) 1991-11-14
BR8904483A (pt) 1990-04-24
DE3830467A1 (de) 1990-03-15
FI894203L (fi) 1990-03-09
FI894203A0 (fi) 1989-09-06
AU4109289A (en) 1990-03-15
ATE101364T1 (de) 1994-02-15
JPH02107491A (ja) 1990-04-19

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