EP0456074B1 - Agent mouillant pour l'impression offset - Google Patents

Agent mouillant pour l'impression offset Download PDF

Info

Publication number
EP0456074B1
EP0456074B1 EP91106919A EP91106919A EP0456074B1 EP 0456074 B1 EP0456074 B1 EP 0456074B1 EP 91106919 A EP91106919 A EP 91106919A EP 91106919 A EP91106919 A EP 91106919A EP 0456074 B1 EP0456074 B1 EP 0456074B1
Authority
EP
European Patent Office
Prior art keywords
fountain solution
weight
dampening solution
pbw
solution
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.)
Expired - Lifetime
Application number
EP91106919A
Other languages
German (de)
English (en)
Other versions
EP0456074A3 (en
EP0456074A2 (fr
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
Publication of EP0456074A2 publication Critical patent/EP0456074A2/fr
Publication of EP0456074A3 publication Critical patent/EP0456074A3/de
Application granted granted Critical
Publication of EP0456074B1 publication Critical patent/EP0456074B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a dampening solution or a dampening solution concentrate for use in offset printing.
  • water or dilute acid can be used as the dampening solution.
  • the ink-water balance is difficult to maintain.
  • substances are usually added to the dampening solution, e.g. B. optimize the pH value and the compatibility with the printing ink and counteract disturbances that can be caused by the regionally different water, paper or microorganisms.
  • additives are used in particular to keep the printing plate moist.
  • chelating agents organic solvents, preservatives, occasionally surfactants, corrosion inhibitors and defoamers are used.
  • US Pat. No. 4,234,443 presents a powder which is to be used as a dampening solution in aqueous solution. It is prepared from phosphate, metasilicate, tetrapotassium pyrophosphate and dialkylpolysiloxane as well as from reaction products of alkylphenol or aliphatic alcohols with ethylene oxide in a molar ratio of 1: 9 to 1:50.
  • the aqueous solution of this powder reacts alkaline, a property which can have an unfavorable effect on the positive printing plate layers which are soluble in alkali due to the action of light.
  • Working dampening solution needs more isopropanol or a corresponding substitute in order to keep the water absorption in a range which is favorable for printing (Braun, American Ink Maker, 1985, Fig. 16).
  • reaction products of alkylphenol with ethylene oxide are not sufficiently biodegradable.
  • EP-A 0 336 673 describes a dampening solution for offset printing which, in addition to other surface-active agents, such as anionic or nonionic agents, contains 0.1 to 5% by weight of a monoalcohol or diol of alkanes or alkenes, to which pro mol 1 to 10 mol ethylene oxide and / or propylene oxide is added.
  • a preferred embodiment of this dampening solution comprises not less than 1% by weight of the surfactant.
  • the disadvantage of this dampening solution is that the surface-active agent in the stated amount cannot be incorporated into a concentrate. It is therefore necessary either to use a no longer cost-effective two-stage approach for the consumer, or to use ready-to-use, i.e. H. already diluted to the final concentration, solutions reach the market, which means the transport of 100 times the amount.
  • the ready-to-use dampening solution contains 0.001 to 0.08% by weight, preferably 0.003 to 0.05% by weight, of at least one alkane or alkenol or of the alkane or alkenediol with 5 up to 15 carbon atoms, which is converted into polyether structures with 3 to 12, in particular 6 to 8, ethylene oxide and / or propylene oxide units.
  • the surfactant mentioned has the advantage that even in the low concentration claimed according to the invention it causes a surface tension in the dampening solution of 30 to 45 mN / m, which can only be achieved when isopropanol is used at a concentration of 3 to 20% by weight.
  • the dampening solution according to the invention despite the low concentration of the surfactant mentioned, has comparable values in terms of surface tension and at the same time significantly better values in water absorption and better behavior on the printing press in the scum cycle -Test shows.
  • alkane or alkenols or alkane or alkene diols are mentioned as alkane or alkenols or alkane or alkene diols.
  • Preferred are: n-pentanol, 2-methylbutanol, 1-penten-3-ol, 1-hexanol, 3-hexanol, 4-methyl-2-pentanol, 2-ethylbutanol, 5-hexen-1-ol, 1-heptanol , Heptenol, n-octanol, 1-octen-3-ol, 2-ethylhexanol, nonanol, 2,6-dimethyl-4-heptanol, n-decanol, decenol, sec.
  • the surfactants used according to the invention have polyether structures with 3 to 12 ethylene oxide and / or propylene oxide units. These surfactants are produced by adding 3 to 12, in particular 6 to 8, mol units of ethylene and / or propylene oxide per mol of alcohol become. If ethylene and propylene oxide are to be reacted with the alcohol, they are preferably used in equimolar amounts. In this case, the mole fraction of the individual components is 3 to 6 moles.
  • the dampening solution according to the invention can contain small amounts of low-volatility solvents with a boiling point above 100 ° C and a flash point above 21 ° C, which favorably influence the water absorption in the ink, e.g. As methylpyrrolidone, glycol ether, alcohols or lactones.
  • Protective film formers and viscosity control agents which can be present in the dampening solution are customary water-soluble polymers such as polyglycols, polyacrylic compounds, such as polyacrylamides, polyacrylic acid and their copolymers, polyvinyl alcohols and their derivatives, polyvinylpyrrolidone, gum arabic, starch, dextrin and cellulose ether.
  • the water-soluble polymers mentioned are present in the ready-to-use dampening solution in a concentration of 0.001 to 5% by weight, preferably 0.005 to 1% by weight.
  • organic acids and / or their salts and other buffer mixtures which are otherwise customary are used.
  • Organic acids include citric, vinegar, oxalic, malonic, p-toluenesulfonic, tartaric and maleic acids, etc. If the acids are used as such, the desired pH is adjusted in the above range by adding alkali, in particular NaOH, or by adding phosphates, in particular trisodium phosphate.
  • the dampening solution according to the invention can also contain moisturizing agents which form a moisture film on the plate and thus ensure rapid rewetting after the machine has come to a standstill.
  • moisturizing agents include in particular glycerol, sugar alcohols, ethylene glycol, propylene glycol, butylene glycol, pentanediol, hexanediol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol and / or tripropylene glycol.
  • the compounds mentioned can be present in the dampening solution in a concentration of preferably up to 1% by weight.
  • Chelating agents can also be added to the dampening solution.
  • Organic amines are particularly preferred. However, their presence in the dampening solution is not essential to the invention.
  • Chelating agents can usually be present in the dampening solution in concentrations of 0.001 to 0.5% by weight, preferably 0.01 to 0.2% by weight.
  • the stated constituents are supplemented with water to 100% by weight in the stated amounts.
  • the total hardness of the water can range from 1 to 40, in particular from 8 to 25 ° d.
  • the carbonate hardness of the added water is in particular 3 to 20 ° d.
  • the dampening solution concentrate contains the respective constituents in concentrations which correspond to 30 to 100 times, preferably 40 to 70 times, the values given in the present description. This concentrate is then diluted by the user with water of the above quality to the ready-to-use dampening solution.
  • An electrolytically roughened and anodized aluminum foil is made with a solution 2.17 pbw of 1,2-naphthoquinonediazide-4-sulfonic acid 4- ( ⁇ , ⁇ -dimethylbenzyl) phenyl ester, 1.02 pbw of the esterification product from 1 mol of 2,2'-dihydroxy-dinaphthyl- (1,1 ') methane and 2 mol of 1,2-naphthoquinonediazide-5-sulfonic acid chloride, 0.37 pbw of 1,2-naphthoquinonediazide-4-sulfonic acid chloride, 0.10 pbw crystal violet and 9.90 pbw of a cresol-formaldehyde novolak with a softening range of 112 to 118 ° C in 43 Vt tetrahydrofuran, 35 Vt ethylene glycol monomethyl ether and 9 Vt Bureau of acetic acid coated and dried.
  • the light-sensitive material obtained is exposed under a photographic, positive original, which contains, inter alia, a 21-step wedge with density increments of 0.15.
  • the exposure time is chosen so that level 9 is fully covered. It is developed with a 5% aqueous sodium metasilicate solution, rinsed well, fixed with acid and printed in a Heidelberg GTO-VP printing machine with an alcohol dampening system. K + E Black 185 W (BASF) is used as the printing ink.
  • a mixture is used as a dampening solution 0.004 pbw of ethoxylated decyl alcohol with 7 ethylene oxide units, 0.002 pbw of ethoxylated and propoxylated C10 / C12 alcohol (4 ethoxy and 4 propoxy units), 0.002 pbw of dialkyldimethylammonium chloride (alkyl ⁇ 10 C atoms), 0.16 pbw of citric acid, 0.2 pbw of dipropylene glycol, 0.06 pbw of N-methylpyrrolidone, 0.06 pbw of a preservative as well as much NaOH to adjust pH 5.0 and enough water with a total hardness of 17 ° d and a carbonate hardness of 11 ° d to add the dampening solution to 100 Gt.
  • the surface tension becomes 36 mN / m, the water consumption compared to a conventional dampening solution with 20% isopropanol added as 100% to 69% (comparative example 14), the number of sheets up to free running (scum cycle test) to 120 pieces and determined the water absorption to 38%.
  • Example 1 A solution that is made from is used as the dampening solution 0.02 pbw of ethoxylated decyl alcohol, 0.16 pbw of citric acid, 0.06 Gt Piror P 840, 0.3 pbw of dipropylene glycol, 0.06 pbw of N-methylpyrrolidone, 0.02 pbw of polyglycol 600 by dissolving in deionized water, so that after adjusting the pH to 5 100 Gt result.
  • the solution has a surface tension of 39.5 mN / m. Perfect prints are obtained in the printing press.
  • the water consumption is reduced compared to comparative example 14.
  • the water absorption of the printing ink LITHO-SET-SE Black No. 50-940 100-6 has been reduced to 33% compared to Comparative Example 13, representative of dampening solutions containing isopropanol, resulting in a brilliant print with well-muted full tones.
  • Example 14 The procedure is as in Example 1, with the exception that no surfactant is used. A value of 65 mN / m is determined for the surface tension.
  • the water consumption on the printing machine compared to Example 14 is 100%, ie the water consumption cannot be reduced with a dampening solution without surfactant.
  • the scum cycle test yields a sheet count of 150, after which perfect prints can be achieved again.
  • the water absorption is> 45%.
  • the improvement by the surfactants according to the invention is clearly visible.
  • a mixture of 10 pbw of isopropanol, 0.16 pbw of citric acid and 0.02 pbw of polyglycol 600 is used as the dampening solution.
  • the agent is supplemented with water with a total hardness of 17 ° d and a carbonate hardness from 11 ° d to 100 pbw and adjusted to a pH of 5.0 with NaOH.
  • This solution has a surface tension of 36.5 mN / m.
  • the printing ink LITHO-SET-SE black from Siegwerk absorbs 37% of this dampening solution.
  • the fountain solutions according to the invention have comparable properties to isopropanol, but also have the advantages described.
  • a mixture of 20 pbw of isopropanol, 0.16 pbw of citric acid and 0.15 pbw of glycerin is used as the dampening solution.
  • the agent is supplemented with water with a total hardness of 30 ° d and a carbonate hardness from 14 ° d to 100 pbw and adjusted to a pH of 5.0 with NaOH.
  • This dampening solution serves as a reference example with isopropanol for the pressure tests on the Heidelberg GTO-VP.
  • the water consumption is set to 100%.
  • the number of sheets up to free running is 100.
  • this example shows in comparison to the disadvantages according to the invention.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Detergent Compositions (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (8)

  1. Agent mouillant pour l'impression offset, caractérisé en ce que l'agent prêt à l'emploi contient 0,001 à 0,08 % en poids d'au moins un alcanol ou alcénol ou d'un alcanediol ou alcènediol en C₅₋₁₅, qui est transformé avec de l'oxyde d'éthyléne et/ou de l'oxyde de propylène en structures polyéther comportant 3 à 12 motifs oxyde d'éthyléne et/ou oxyde de propylène.
  2. Agent mouillant selon la revendication 1, caractérisé en ce que cet agent contient 0,003 à 0,05 % en poids desdits composés.
  3. Agent mouillant selon la revendication 1 ou 2, caractérisé en ce que lesdits composés contiennent 6 à 8 motifs d'oxyde d'éthylène et/ou d'oxyde de propylène.
  4. Agent mouillant selon l'une quelconque des revendications 1 à 3, caractérisé en ce que cet agent renferme des solvants organiques hydrosolubles dont le point d'ébullition est supérieur à 100°C et le point de flamme est supérieur à 21°C.
  5. Agent mouillant selon la revendication 4, caractérisé en ce que ces solvants sont présents dans l'agent de mouillage à une concentration de 0,005 à 0,7 % en poids, de préférence 0,01 à 0,3 % en poids.
  6. Agent mouillant selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la valeur de son pH est réglé entre 4 et 6.
  7. Agent mouillant selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il contient des agents de rétention d'humidité à des concentrations pouvant aller jusqu'à 1 % en poids.
  8. Agent mouillant selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il contient en outre des polymères hydrosolubles, des inhibiteurs de corrosion, des agents chélatants, des conservateurs, des colorants et/ou des agents antimousse.
EP91106919A 1990-05-10 1991-04-29 Agent mouillant pour l'impression offset Expired - Lifetime EP0456074B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4014960 1990-05-10
DE4014960A DE4014960A1 (de) 1990-05-10 1990-05-10 Feuchtmittel fuer den offsetdruck

Publications (3)

Publication Number Publication Date
EP0456074A2 EP0456074A2 (fr) 1991-11-13
EP0456074A3 EP0456074A3 (en) 1992-07-29
EP0456074B1 true EP0456074B1 (fr) 1995-03-29

Family

ID=6406087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106919A Expired - Lifetime EP0456074B1 (fr) 1990-05-10 1991-04-29 Agent mouillant pour l'impression offset

Country Status (11)

Country Link
EP (1) EP0456074B1 (fr)
JP (1) JPH05139068A (fr)
KR (1) KR910019804A (fr)
AT (1) ATE120409T1 (fr)
AU (1) AU7645191A (fr)
BR (1) BR9101912A (fr)
CA (1) CA2041516A1 (fr)
DE (2) DE4014960A1 (fr)
DK (1) DK0456074T3 (fr)
FI (1) FI101614B1 (fr)
NO (1) NO911803L (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220550A1 (de) * 1991-07-04 1993-01-14 Hostmann Steinberg Gmbh Feuchtmittelkonzentrat und feuchtmittel und deren verwendung beim offset-druckverfahren
US5714302A (en) * 1993-01-26 1998-02-03 Mitsubishi Paper Mills Limited Method of printing with using lithographic printing plate made by silver complex diffusion transfer process and using dampening composition containing nonionic surface active agent
JP3107939B2 (ja) * 1993-01-26 2000-11-13 三菱製紙株式会社 平版印刷版用給湿液組成物
JP3381372B2 (ja) * 1994-04-08 2003-02-24 東洋インキ製造株式会社 平版印刷用湿し水及び印刷方法
JP3318447B2 (ja) * 1994-11-10 2002-08-26 富士写真フイルム株式会社 平版印刷用湿し水組成物
JP3692220B2 (ja) * 1997-09-03 2005-09-07 富士写真フイルム株式会社 平版印刷版用湿し水組成物
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
WO2007097169A1 (fr) * 2006-02-24 2007-08-30 Konica Minolta Medical & Graphic, Inc. materiau de plaque lithographique, procede de production et procede d'impression
EP2042338A3 (fr) 2007-09-26 2010-03-10 Fujifilm Corporation Composition de solution de mouillage pour impression lithographique et procédé d'impression en offset utilisant des encres thermoséchantes
JP6930520B2 (ja) * 2018-12-27 2021-09-01 東洋インキＳｃホールディングス株式会社 平版印刷用湿し水組成物、及び印刷物の製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214531A (en) * 1975-04-07 1980-07-29 The Dow Chemical Company Method of treating image-bearing lithographic plates
US4234443A (en) * 1978-03-24 1980-11-18 Michael A. Canale Composition and a method useful for making a fountain solution for lithographic printing operations
CA1329719C (fr) * 1987-07-31 1994-05-24 Tadao Toyama Plaque d'impression lithographique et methode de traitement connexe
EP0336673B1 (fr) * 1988-04-07 1994-03-09 Fuji Photo Film Co., Ltd. Composition pour solution de mouillage par l'impression lithographique et additif pour l'eau de mouillage

Also Published As

Publication number Publication date
DK0456074T3 (da) 1995-08-28
AU7645191A (en) 1991-11-14
FI912224A (fi) 1991-11-11
DE4014960A1 (de) 1991-11-14
FI101614B (fi) 1998-07-31
FI912224A0 (fi) 1991-05-08
JPH05139068A (ja) 1993-06-08
NO911803D0 (no) 1991-05-08
DE59105027D1 (de) 1995-05-04
FI101614B1 (fi) 1998-07-31
BR9101912A (pt) 1991-12-17
ATE120409T1 (de) 1995-04-15
NO911803L (no) 1991-11-11
EP0456074A3 (en) 1992-07-29
CA2041516A1 (fr) 1991-11-11
KR910019804A (ko) 1991-12-19
EP0456074A2 (fr) 1991-11-13

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