EP1285033A2 - Drucktinte auf basis von polymerlatex - Google Patents

Drucktinte auf basis von polymerlatex

Info

Publication number
EP1285033A2
EP1285033A2 EP01939191A EP01939191A EP1285033A2 EP 1285033 A2 EP1285033 A2 EP 1285033A2 EP 01939191 A EP01939191 A EP 01939191A EP 01939191 A EP01939191 A EP 01939191A EP 1285033 A2 EP1285033 A2 EP 1285033A2
Authority
EP
European Patent Office
Prior art keywords
ink
pigment
water
latex polymer
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Withdrawn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
EP01939191A
Other languages
English (en)
French (fr)
Inventor
Ramasamy Krishnan
Hugo Babij
Marilyn Yamat
Emmanuel Dimotakis
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
Application filed by Sun Chemical Corp filed Critical Sun Chemical Corp
Publication of EP1285033A2 publication Critical patent/EP1285033A2/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Withdrawn legal-status Critical Current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 latex polymer based printing ink.
  • 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 nonprinting 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 RJ. 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. It is fairly simple to define an image area by raising it above the background as in the case of the flexographic printing plate or lowering it as in the case of the gravure printing plate; avoidance of ink adhering to the non-image area is not too difficult to achieve. However, when all areas are on the same level, techniques must be utilized to insure that ink adheres only to the image area, and not to the non-image area.
  • 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).
  • an inked roller containing the oil-based ink is passed over the damped plate, it will be unable to ink the areas covered by the water film (the non- image areas), but will emulsify the droplets on the water-repellant areas (the image areas) and these will ink up.
  • Such process is called offset lithography because the inked image on the plate does not directly print onto the paper substrate, but is first "offset" onto a rubber blanket, and transferred therefrom onto the paper substrate.
  • 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.
  • U.S. Patent 5,725,646 disclosed an invention eliminating the principal disadvantages of conventional offset lithographic printing inks, viz. high levels of VOCs emanating from the oil-based ink and the aqueous fountain solution and the difficulty in controlling the ink/water balance, while preserving the principal advantage of the conventional lithographic printing process, i.e. high surface energy differential between the image and non-image areas of the printing plate.
  • U.S. Patent 5,725,646 teaches a method for making a water based offset lithographic printing ink based predominantly on a rosin ester salt (neutralized to be in a pH range of 7.5-10). Smaller amounts of aqueous emulsion polymers (0-20%) were also present. That invention comprised a water-based printing ink, based predominantly on a rosin ester salt, that is to be used in offset lithographic newspaper printing processes without the need for any accompanying fountain solutions.
  • An object of the present invention is to provide a fast drying offset lithographic printing ink which eliminates the disadvantages of present water based lithographic printing inks by permitting fast drying for acceptable high speed printing.
  • the invention generally comprises a latex polymer based ink comprising: (a) water; (b) a latex polymer; (c) pigment; (d) an acid neutralization agent; and (e) a rewetting agent.
  • a modified rosin polymer may be included.
  • the modified rosin polymer may be 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.
  • 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 natuie.
  • 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.
  • the latex polymers employed in the present invention are those of a particle sign of less than .03 micron.
  • the particle size of the latex polymers is 0.1 to 0.2 micron.
  • Suitable examples of such latex polymers are urethane latex polymers or acrylic latex polymers such as an acrylic latex polymer from S. C. Johnson Joncryl 537.
  • 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, 81, 104, 146, 170 and 176; CI Pigment Greens 2, 1 and 36; CI Pigment Blues 1, 15:1, 15:2, 15:3, 15:6, 16, 29, 56 and 61 ; CI Pigment Violets 3, 23 and 37; CI Pigment Blacks 6 and 7; and CI Pigment Whites 6, 7, 18 and 26.
  • 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,
  • rewetting agents for water based printing inks are well known in the art and may be employed in accordance with the present invention, however, the preferred rewetting agent is hydroxyethylethylene urea.
  • acid neutralization agents for use in water based printing inks are equally well known in the art, however, the preferred acid neutralization agent is monoethanolamine.
  • the modified rosin polymer according to the present invention may be a maleic modified rosin esterified with pentaerithrytol.
  • suitable modified rosin polymers 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 poly aery lamide polymers.
  • the modified rosin polymers present in the ink are only those modified rosin polymers which are soluble in the water at pH ranging from about 7.5 to about 10.
  • 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).
  • modified rosin polymers 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 water is present in amounts of 25 to 60 wt.%; and more preferably 35 to 50 wt.%.
  • the latex polymer is present in amounts of 10 to 50 wt.%, and more preferable 15 - 40 wt.%.
  • the pigment is present in amounts of 10 to 25 wt.%.
  • the acid neutralization agent is present in amounts of 0.5 - 2 wt.%.
  • the rewetting agent is present in amounts from 0.5 to 10 wt.%>.
  • a modified rosin polymer when used, it 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 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.
  • latex polymer based printing 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 black water based offset ink was prepared as follows, and made with the following compositions:
  • the latex polymer was a urethane type containing 40%) solids and 60% water.
  • the composition was stable on a conventional ink train on a Heidelberg press and gave dry prints comparable to magic oil based inks. In addition, the ink was easily washed off from the press rollers with plain tap water.
  • a black water based offset ink was prepared as follows, and made with the following compositions:
  • Example 2 A composition similar to Example 1 was made replacing the urethane latex polymer with an acrylic latex polymer from S.C. Johnson Joncryl 537.
  • the latex polymer was an acrylic type from S.C. Johnson having the trade name Joncryl 537.
  • the composition was stable on a conventional ink train on a Heidelberg press and gave dry prints comparable to magic oil based inks. In addition, the ink was easily washed off from the press rollers with plain tap water.

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)
  • Paints Or Removers (AREA)
EP01939191A 2000-05-20 2001-05-18 Drucktinte auf basis von polymerlatex Withdrawn EP1285033A2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US57607800A 2000-05-20 2000-05-20
US576078 2000-05-20
PCT/US2001/016342 WO2001090263A2 (en) 2000-05-20 2001-05-18 Latex polymer based printing ink

Publications (1)

Publication Number Publication Date
EP1285033A2 true EP1285033A2 (de) 2003-02-26

Family

ID=24302887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01939191A Withdrawn EP1285033A2 (de) 2000-05-20 2001-05-18 Drucktinte auf basis von polymerlatex

Country Status (6)

Country Link
EP (1) EP1285033A2 (de)
JP (1) JP2004521966A (de)
CN (1) CN100372896C (de)
BR (1) BR0111348A (de)
CA (1) CA2409307A1 (de)
WO (1) WO2001090263A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0308487D0 (en) * 2003-04-14 2003-05-21 Ciba Spec Chem Water Treat Ltd Paper coating compositions
US20050143488A1 (en) * 2003-12-31 2005-06-30 Dandreaux Gary F. Water washable lithographic printing inks having low VOC content
WO2007009161A1 (en) 2005-07-15 2007-01-25 Chroma Australia Pty Limited Paint composition
WO2008102722A1 (ja) * 2007-02-23 2008-08-28 Konica Minolta Holdings, Inc. 水性インクジェットインク及び記録方法
KR101534251B1 (ko) 2007-11-06 2015-07-06 로디아 인코포레이티드 폴리머표면과 변경된 유리표면 사이에 인터페이스를 가지는 물품

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4954556A (en) * 1987-11-23 1990-09-04 Ppg Industries, Inc. Water-based ink compositions
EP0317906A3 (de) * 1987-11-23 1991-01-30 Ppg Industries, Inc. Wässrige Tintenzusammensetzungen
US5725646A (en) * 1996-03-13 1998-03-10 Sun Chemical Corporation Water-based offset lithographic printing ink
US5778789A (en) * 1996-03-13 1998-07-14 Sun Chemical Offset lithographic printing process with a water based ink
EP0988350A1 (de) * 1997-11-26 2000-03-29 Sun Chemical Corporation Wässrige offsetlithographische zeitschriftendrucktinte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0190263A3 *

Also Published As

Publication number Publication date
CN1430656A (zh) 2003-07-16
CN100372896C (zh) 2008-03-05
WO2001090263A2 (en) 2001-11-29
BR0111348A (pt) 2003-04-29
WO2001090263A3 (en) 2002-03-21
CA2409307A1 (en) 2001-11-29
JP2004521966A (ja) 2004-07-22

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