EP0322658A1 - Solution de mouillage pour impression offset - Google Patents

Solution de mouillage pour impression offset Download PDF

Info

Publication number
EP0322658A1
EP0322658A1 EP88120958A EP88120958A EP0322658A1 EP 0322658 A1 EP0322658 A1 EP 0322658A1 EP 88120958 A EP88120958 A EP 88120958A EP 88120958 A EP88120958 A EP 88120958A EP 0322658 A1 EP0322658 A1 EP 0322658A1
Authority
EP
European Patent Office
Prior art keywords
solution
general formula
solution according
dampening solution
moistening
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
EP88120958A
Other languages
German (de)
English (en)
Other versions
EP0322658B1 (fr
Inventor
Harald Dr. Lauke
Gregor Dr. Schuermann
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0322658A1 publication Critical patent/EP0322658A1/fr
Application granted granted Critical
Publication of EP0322658B1 publication Critical patent/EP0322658B1/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

  • Offset printing plates generally consist of a layer support on which a radiation-sensitive reproduction layer is applied, with the aid of which an image is photomechanically generated from a template. After the printing form has been produced, the layer support carries the color-bearing image areas during later printing and at the same time forms the water-bearing image background in the non-image areas (non-image areas).
  • an aqueous dampening solution is generally applied to the plate surface during the printing process.
  • the dampening solution is applied to the plate by one or more rollers.
  • At least one ink roller which is covered with an oil-based ink, contacts the entire surface of the plate, but only colors the hydrophobic image areas because of the oil-repellent properties of the non-image areas.
  • the dampening solution and at least part of the oil-based ink can be applied to the plate simultaneously with a roller.
  • Agents such as gum arabic, glycerol and the like for hydrophilization have long been known, which usually contain additions of phosphates, citrates or corresponding acids, which act as buffers and set the pH range of 4.5 and 6, which is particularly favorable for offset printing.
  • the natural product gum arabic fluctuates in quality and, as a component in dampening solutions, leads to excessive emulsification of the printing ink, which results in uneven coloring of the printing plate.
  • DE-B-1 121 632 (corresponding to US-A-3 108 535) proposes an aqueous dampening and cleaning agent for the offset printing process which contains polyvinylphosphonic acid, vinylphosphonic acid or mixtures of the components with glycerol, optionally with the addition of those known for dampening solutions Substances such as ammonium phosphate, citrates, carboxymethyl cellulose and others contains.
  • EP-A-0 091 601 describes a moistening solution which contains water-miscible or water-soluble polymers instead of the isopropanol also used, cellulose ethers, polyacrylamides, polyvinyl alcohols or chemically modified rubber products being used in particular.
  • US Pat. No. 4,186,250 describes mixtures of polyacrylamides with polycarboxylic acids or their alkali metal salts.
  • Such solutions have the same shortcomings as have already been described for the polymers.
  • US-A-4 374 036 describes a wetting solution which contains polyphosphates, water-soluble polyethylene glycols, carboxymethyl cellulose, nonionic or anionic surfactants of the alkyl orthophosphate and alkyl polyphosphate type and a polysiloxane.
  • a disadvantage is the inadequate hydrolysis stability of polyphosphates, so that work must be carried out in the neutral range, although in practice pH values around 5 have proven to be better.
  • Moisturizing solutions for offset printing which contain aminomethylenephosphonic acid and / or their derivatives, have already been proposed.
  • the present invention relates to an aqueous dampening solution for the offset printing process, which is characterized in that the solution is a hydrolyzate of a compound of the general formula (I) (R1O) 2- -CH2-CH2-Si (OR2) 3 (I) wherein R1 and R2 are the same or different from each other and represent hydrogen, an alkyl radical having 1 to 9 carbon atoms or an aryl radical having 6 to 12 carbon atoms, or contains condensates of this hydrolyzate.
  • the solution is a hydrolyzate of a compound of the general formula (I) (R1O) 2- -CH2-CH2-Si (OR2) 3 (I) wherein R1 and R2 are the same or different from each other and represent hydrogen, an alkyl radical having 1 to 9 carbon atoms or an aryl radical having 6 to 12 carbon atoms, or contains condensates of this hydrolyzate.
  • the compounds of the general formula (I) can also be present, at least in part, in the form of their salts and additionally contain a buffer system, a biocide, a corrosion inhibitor, glycol and / or alcohol.
  • the dampening solution can be in the form of a concentrate, which may contain 0.01 to 100 g / l of the compound of the general formula (I).
  • the pH of the dampening solution is expediently in the range between 3.0 and 7.0, preferably between 4.0 and 5.5.
  • the hydrophilization of the non-image areas of the printing plate is renewed during the offset printing process, whereby toning is prevented until the end of the printing process.
  • a particular advantage of the moistening solution according to the invention is that disturbances caused by hard water or cations which have been introduced are prevented.
  • Another important advantage of the dampening solution according to the invention is that the compound of the general formula (I), in particular [2- (trihydroxysilyl) ethyl] phosphonic acid and its salts, are easily accessible from inexpensive raw materials and can be prepared in a constant quality and also in higher concentrations can be used.
  • Silanes of the general formula (I), e.g. [2- (trialkoxysilyl) ethyl] phosphonic acid dimethyl ester or [2- (trialkoxysilyl) ethyl] phosphonic acid diethyl ester such as e.g. the [2- (trimethoxysilyl) ethyl] dimethyl or diethyl ester can be prepared in a conventional manner, e.g. as described in US Pat. Nos. 3,780,127 and 3,816,550, in conc. Hydrochloric acid can be hydrolyzed. After removing excess hydrochloric acid, the product obtained in this way can be diluted with water. To a certain extent, condensates can also form during hydrolysis.
  • hydrolyzates and condensates as well as mixtures of hydrolyzates and condensates of the compounds of general formula (I) can be used according to the invention for the dampening solution, as long as it is ensured that the hydrolyzates or their condensates are completely dissolved or homogeneous in aqueous or alcoholic / aqueous solution are distributed.
  • Suitable salts of the hydrolysates are their alkali and alkaline earth salts, in particular their Na+, K+ and NH4+ salts.
  • the hydrolyzates and / or their condensates or their salts are generally present in the dampening solution according to the invention in amounts of 0.01 to 10, preferably 0.1 to 2% by weight, based on the total amount of the dampening solution.
  • the pH of the dampening solution is expediently adjusted to a pH between 3 and 7, preferably between 4 and 5.5.
  • the dampening solution according to the invention can also be stored in the form of a concentrate which contains up to 100 g / l of hydrolyzate of a compound of the general formula (I), its condensate or salts, and, if appropriate, the additives mentioned above.
  • dampening solution according to the invention it is possible to maintain the hydrophilicity and thus the water-carrying properties of the non-image areas during the printing process, without sticky deposits and disturbances caused thereby, for example when using high-molecular compounds.
  • An electrolytically roughened and anodized aluminum plate is immersed in the dampening solution to be tested and then dried.
  • the entire plate is then printed with offset ink in a sample printing device. After the ink has dried somewhat, the plate is again placed in the dampening solution and the time taken for the printing ink to detach from the plate. The faster this happens, the better the humectant works.
  • Example 2 The experiment described in Example 2 was repeated with the change that this time no [2- (trihydroxysilyl) ethyl] phosphonic acid was added to the solution. The color only came off the plate after several hours.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
EP88120958A 1987-12-24 1988-12-15 Solution de mouillage pour impression offset Expired - Lifetime EP0322658B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873744121 DE3744121A1 (de) 1987-12-24 1987-12-24 Befeuchtungsloesung fuer den offsetdruck
DE3744121 1987-12-24

Publications (2)

Publication Number Publication Date
EP0322658A1 true EP0322658A1 (fr) 1989-07-05
EP0322658B1 EP0322658B1 (fr) 1991-08-07

Family

ID=6343621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120958A Expired - Lifetime EP0322658B1 (fr) 1987-12-24 1988-12-15 Solution de mouillage pour impression offset

Country Status (6)

Country Link
US (1) US4970138A (fr)
EP (1) EP0322658B1 (fr)
JP (1) JPH01204793A (fr)
DE (2) DE3744121A1 (fr)
ES (1) ES2023482B3 (fr)
FI (1) FI885921A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2673586B2 (ja) * 1989-08-02 1997-11-05 富士写真フイルム株式会社 平版印刷版用湿し水組成物，それに使用する濃縮液及びそれを使用する平版印刷方法
DE19500253A1 (de) * 1995-01-05 1996-07-11 Wacker Chemie Gmbh Phosphorhaltige Organosiliciumverbindungen
JP2005178238A (ja) * 2003-12-22 2005-07-07 Konica Minolta Medical & Graphic Inc 印刷方法とそれに用いる印刷版材料
JP5927746B2 (ja) * 2012-06-29 2016-06-01 日油株式会社 平版印刷版用湿潤剤

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780127A (en) * 1972-10-02 1973-12-18 Union Carbide Corp Catalytic process for dehydration of alcohols
US4374036A (en) * 1980-04-16 1983-02-15 Michael A. Canale Composition and concentrate useful for making a fountain solution for lithographic printing operations
EP0220662A1 (fr) * 1985-10-31 1987-05-06 Hoechst Aktiengesellschaft Composition de mouillage pour impression lithographique

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA592213A (en) * 1960-02-09 G. Linville Robert Organophosphorus-silicon compositions
NL129715C (fr) * 1961-01-13
LU55826A1 (fr) * 1967-04-19 1969-11-13
US4084951A (en) * 1971-05-03 1978-04-18 Ciba-Geigy Ag Silicon compounds containing nucleofugal phosphate group and method of regulating plant growth therewith
US3816550A (en) * 1972-10-02 1974-06-11 Union Carbide Corp Catalytic process for hydration of olefins
NL7606078A (nl) * 1975-06-12 1976-12-14 Dow Chemical Co Werkwijze voor het bereiden van een bevochti- gingsoplossing voor lithografische drukken.
CA1228204A (fr) * 1982-03-29 1987-10-20 Richard J. Burns Solution d'encrage
US4772408A (en) * 1987-05-06 1988-09-20 First Brands Corporation Silicate-containing antifreeze with phosphonate silane stabilizer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780127A (en) * 1972-10-02 1973-12-18 Union Carbide Corp Catalytic process for dehydration of alcohols
US4374036A (en) * 1980-04-16 1983-02-15 Michael A. Canale Composition and concentrate useful for making a fountain solution for lithographic printing operations
EP0220662A1 (fr) * 1985-10-31 1987-05-06 Hoechst Aktiengesellschaft Composition de mouillage pour impression lithographique

Also Published As

Publication number Publication date
DE3864134D1 (de) 1991-09-12
DE3744121A1 (de) 1989-07-06
ES2023482B3 (es) 1992-01-16
FI885921A (fi) 1989-06-25
JPH01204793A (ja) 1989-08-17
EP0322658B1 (fr) 1991-08-07
US4970138A (en) 1990-11-13

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