EP0988350A1 - Wässrige offsetlithographische zeitschriftendrucktinte - Google Patents

Wässrige offsetlithographische zeitschriftendrucktinte

Info

Publication number
EP0988350A1
EP0988350A1 EP98959394A EP98959394A EP0988350A1 EP 0988350 A1 EP0988350 A1 EP 0988350A1 EP 98959394 A EP98959394 A EP 98959394A EP 98959394 A EP98959394 A EP 98959394A EP 0988350 A1 EP0988350 A1 EP 0988350A1
Authority
EP
European Patent Office
Prior art keywords
ink
water
pigment
resin
group
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.)
Withdrawn
Application number
EP98959394A
Other languages
English (en)
French (fr)
Inventor
Ramasamy Krishnan
Neil Young
Kegi Gan
Marilyn Yamat
Hugo Babij
Martin Thomas Czebotar
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.)
Sun Chemical Corp
Original Assignee
Sun Chemical Corp
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
Priority claimed from US08/978,604 external-priority patent/US5951147A/en
Application filed by Sun Chemical Corp filed Critical Sun Chemical Corp
Publication of EP0988350A1 publication Critical patent/EP0988350A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks

Definitions

  • the invention relates to water-based offset lithographic newspaper printing ink.
  • VOCs volatile organic compounds
  • Water-based printing inks for use in flexographic printing processes are known in the prior art. This type of printing process utilizes printing plates wherein the printing images stand up in relief, i.e. the areas to be printed are raised above the non-printing areas. Printing by the flexographic process requires relatively low pressure while sufficient pressure is applied to transfer the ink from the face of the image carrier to the surface of the substrate. Examples of useful water- based flexographic printing inks are disclosed in U.S. Patent No. 4,173,554 and The Printing Ink Manual, edited by R.H. Leach and R.J. Pierce, pages 571-576, 5th edition, (Blueprint, 1993) .
  • Water-based inks for gravure printing are also well known.
  • the printing image is engraved into a cylinder in the form of cells which become filled with ink.
  • Printing is achieved by passing the substrate between the gravure cylinder and impression roller under pressure. Examples of useful water-based gravure printing inks are disclosed in U.S. Patent Nos. 4,954,556 and 5,098,478.
  • the offset lithographic printing process presents a unique challenge to ink formulators since such process utilizes a planographic printing plate, i.e. the image and non- image areas are in the same plane on the image carrier, and two fluids are concurrently utilized.
  • the plate is damped before it is inked with an oil-based ink.
  • the damping process utilizes a fountain solution such as those described in US patents 3,877,372, 4,278,467 and 4,854,969. Water will form a film on the hydrophilic areas (i.e. the non-image areas) of the printing plate, but will contract into tiny droplets on the oleophilic areas (i.e. the image areas) .
  • U.S. Patent 3,356,030 discloses the use of a water- based printing ink in respect to a method of planographic printing utilizing a lithographic printing plate whose non-image areas are coated with a cured coating of a thermosetting silicone resin.
  • the patented method also entails the use of a volatile hydrocarbon fountain solution which will coat the non-image areas and which is re-applied between successive printings.
  • the use of a volatile hydrocarbon fountain solution undermines the principal purpose of the water- based ink compositions of the present invention, i.e. the avoidance of the use of volatile organic compounds ("VOCs") during the printing process.
  • VOCs volatile organic compounds
  • the water- based ink compositions of the present invention may be used for offset lithographic printing processes without any fountain solution whatsoever.
  • the waterless printing process solved two issues: VOCs emanating from the fountain solutions and control of the ink/water balance by the pressman.
  • VOCs emanating from the fountain solutions
  • the difference in surface energy between the image and non- image areas of the conventional offset lithographic printing plate is typically 40 dynes/cm is dramatically reduced to 20 dynes/cm in the case of the waterless printing plate. Therefore the latitude between scumming and poor print density is considerably narrowed and the issue of VOCs (emanating from the oil -based ink) still remains in respect to waterless printing.
  • German Offenlegungsschrift DE 41 19 348 Al pertains to a moistureless offset printing method and a water- based printing ink.
  • the ink described therein is one which will adhere to hydrophilic materials, but not to hydrophobic materials, and contains a dye, water, 5-50% water-soluble macromolecular binder and a hygroscopic liquid, preferably a multihydric alcohol.
  • the invention is a water-based single fluid fountain solution free offset lithographic news ink comprising: (a) water; (b) a macromolecular resin binder comprised of: (i) resin soluble in water regardless of the pH of the water, (ii) resin rosin salts soluble in water at a pH ranging from about 7.5 to about 10, and (iii) aqueous emulsions resins; (c) a soybean oil based resin; (d) pigment; and (e)a hydroxyethylethylene urea rewetting agent.
  • a macromolecular resin binder comprised of: (i) resin soluble in water regardless of the pH of the water, (ii) resin rosin salts soluble in water at a pH ranging from about 7.5 to about 10, and (iii) aqueous emulsions resins; (c) a soybean oil based resin; (d) pigment; and (e)a hydroxyethylethylene urea rewetting agent
  • the printing plates for use with the newspaper printing ink of the present invention should be such that the image areas thereof are hydrophilic in nature, while the non-image areas are hydrophobic in nature.
  • An example of a suitable printing plate is the "waterless" Toray type discussed above.
  • the image area of the plate need not contain a photopolymer .
  • the image area of the plate may comprise, e.g. a grained aluminum surface which has no coating thereon, but is hydrophilic in nature.
  • the non- image area of the plate must, of course, be hydrophobic in nature.
  • the non- image area may be covered with any type of hydrophobic material, provided that such hydrophobic material adheres to the non- images area of the plate during the printing process .
  • Suitable macromolecular binders which are soluble in the water phase of the ink regardless of the pH of the water phase include: carboxymethyl- cellulose, hydroxyethylcellulose, hydroxypropyl - cellulose, hydroxybutylmethylcellulose, poly(C ⁇ -C 4 ) alkylene oxides, polyethyleneimine, polyvinyl alcohol, polyvinyl acetate, polyvinylpyrollidone, polyvinyl - oxazolidone and polyacrylamide polymers.
  • the macromolecular resin rosin salt binders present in the ink are only those resin rosin salt binders which are soluble in the water at pH ranging from about 7.5 to about 10.
  • Suitable examples of such resin rosin salt binders include methacrylic resins; styrene-acrylic resins; rosin salts; and polystyrene- sulfonic acid and their salts.
  • Ammonia or an organic amine such as monoethanolamine or N,N-diethanolamine may be added to the water phase in order to adjust the pH to the preferred value (a mineral acid or an organic acid such as acetic acid may be used to adjust the pH to a value in the range of about 2.5 to about 6.5) .
  • Suitable examples of the macromolecular resin binders comprising aqueous emulsions include acrylic or vinyl emulsion polymers prepared from monomers selected from the group consisting of acrylic acid esters, methacrylic acid esters, acrylic acid esters of polyhydric alcohols, methyl methacrylate, styrene, vinyl styrene and vinyl acetate .
  • the offset lithographic news ink formula in the present invention employs a soybean oil based modified resin.
  • soybean oil based systems suitable for use in the present invention are described in U.S.
  • Patent Nos. 5,167,704 and 4,419,132 which describe, inter alia, non-petroleum soybased news inks.
  • Resins modifiable with soybean oils suitable for use in the present invention include Fancol VB and Gilsonite.
  • the pigment may be any of those which are suitable for formulating offset lithographic printing inks such as CI Pigment Yellows 1, 3, 4, 5, 12, 13, 14, 17, 55, 65, 73, 83, 97 and 98; CI Pigment Oranges 13, 16 and 46; CI Pigment Reds 2, 3, 4, 10, 12, 48, 48:1, 48:2, 53, 57:2,
  • the rewetting agent is hydroxyethylethylene urea.
  • the water is present in amounts of 25 to 60 wt.%; and more preferably 35 to 50 wt . % .
  • the macromolecular resin binder be present in amounts of 10 to 70 wt.%; and more preferably 30 to 60 wt.%; and most preferably the macromolecular resin binder is a composite having up to 5 wt.% of a resin binder soluble in water regardless of the pH of the water; 10 to 70 wt.% of a resin binder soluble in water at a pH ranging from 7.5 to 10; and up to 20 wt.% of an aqueous emulsion resin binder.
  • the pigment is preferably present in amounts of 2 to 30 wt.% and the soybean oil based modified resin is present in amounts of 15 to 35 wt%.
  • the hydroxyethyl ethylene urea rewetting agent is preferably present in amounts from 0.5 to 10 wt.%.
  • the usual adjuvants such as waxes, anti- foam agents, biocides, surfactants, corrosion inhibitors, etc. may be incorporated in the inks of the present invention.
  • a non- ionic surfactant is employed in the amount of up to 5 wt.%.
  • Suitable examples of the surfactant include acetylenic glycols, ethoxylated glycols and sorbitan esters .
  • water-based news ink of the present invention are further illustrated by the following non-limiting examples in which all parts and percentages are by weight, unless otherwise indicated.
  • a water-based news ink was prepared from the components indicated below.
  • the water phase of the ink was supplied by the water present in the acrylic resin latex, hydroxypropyl cellulose, hydroxyethyl ethylene urea and the maleated rosin ester.
  • Amount Component (wt . %)
  • Fancol is a trademark of Fanning Corp.
  • Laponite is a trademark of Southern Clay Products Co.
  • a water-based newspaper printing ink was prepared according to the following formulation:
  • Laponite is a trademark of Southern Clay Products .
  • Example 3 A water-based newspaper printing ink was prepared in accordance with Example 2. The ink was run on a Didde printing press. The printing plate, obtained from Toray industries, had an aluminum oxide substrate coated with a photopolymer whose surface was hydrophilic in nature, while the non-image area was coated with a silicone polymer. The press run was carried out at temperatures ranging from 15-20°C at a press speed of 1,000 feet per minute (fpm) . The print samples obtained from the press run were clear and sharp with stable tack and were fast drying. There was no discernible toning in the non- image area nor observable ink buildup on the rollers, plate or blanket. The results gave excellent print quality.
  • Example 4 A black water-based newspaper printing ink was prepared having the following formulation:
  • Laponite RD is a trademark of Southern Clay Products Co.
  • Fancol VB is a trademark of Fanning Corp.
  • the inks were run on a T70 lithographic press manufactured by Goss Graphics at a speed of 50k iph. The printability and runnability of the inks were very good.
  • a low tack version of the ink prepared in Example 4 was prepared using the following formulation:
  • Fancol VB is a trademark of Fanning Corp.
  • Laponite RD is a trademark of Southern Clay Products Co.
  • the ink was run on an offset lithographic printing press manufactured by Koenig & Bauer of Germany with no problems.
  • the print samples had a high print quality.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Printing Methods (AREA)
EP98959394A 1997-11-26 1998-11-11 Wässrige offsetlithographische zeitschriftendrucktinte Withdrawn EP0988350A1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US08/978,604 US5951147A (en) 1997-11-26 1997-11-26 Multiple-peg spherical lamp-holder
US17916498A 1998-10-26 1998-10-26
US179164 1998-10-26
PCT/US1998/023792 WO1999027022A1 (en) 1997-11-26 1998-11-11 Water-based offset lithographic newspaper printing ink
US978604 2001-10-15

Publications (1)

Publication Number Publication Date
EP0988350A1 true EP0988350A1 (de) 2000-03-29

Family

ID=26875067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98959394A Withdrawn EP0988350A1 (de) 1997-11-26 1998-11-11 Wässrige offsetlithographische zeitschriftendrucktinte

Country Status (3)

Country Link
EP (1) EP0988350A1 (de)
CA (1) CA2297045A1 (de)
WO (1) WO1999027022A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100372896C (zh) * 2000-05-20 2008-03-05 太阳化学公司 胶乳聚合物基印刷油墨
JP2002265838A (ja) * 2001-02-28 2002-09-18 Sun Chemical Corp 水性のオフセットリソグラフィー新聞印刷用インク
US20050143488A1 (en) * 2003-12-31 2005-06-30 Dandreaux Gary F. Water washable lithographic printing inks having low VOC content
JP2008538335A (ja) 2005-04-20 2008-10-23 アグフア−ゲヴエルト 無電解沈着触媒のパターンの接触印刷方法
CN103483903A (zh) * 2013-09-23 2014-01-01 严亚木 环保型油墨脂制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079026A (en) * 1977-06-20 1978-03-14 Hercules Incorporated Printing inks and process for using the same
US4419132A (en) * 1982-01-06 1983-12-06 American Newspaper Publishers Association Printing ink
US5167704A (en) * 1989-11-20 1992-12-01 Brower Sharen E Soy ink based art media
US5694848A (en) * 1996-03-13 1997-12-09 Heidelberger Druckmaschinen Ag Printing unit for water based inks
US5778789A (en) * 1996-03-13 1998-07-14 Sun Chemical Offset lithographic printing process with a water based ink

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9927022A1 *

Also Published As

Publication number Publication date
CA2297045A1 (en) 1999-06-03
WO1999027022A1 (en) 1999-06-03

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Inventor name: CZEBOTAR, MARTIN, THOMAS

Inventor name: BABIJ, HUGO

Inventor name: YAMAT, MARILYN

Inventor name: GAN, KEGI

Inventor name: YOUNG, NEIL

Inventor name: KRISHNAN, RAMASAMY

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