EP1657359A1 - Beschichtungszusammensetzung für Offsetpapier - Google Patents

Beschichtungszusammensetzung für Offsetpapier Download PDF

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Publication number
EP1657359A1
EP1657359A1 EP04405707A EP04405707A EP1657359A1 EP 1657359 A1 EP1657359 A1 EP 1657359A1 EP 04405707 A EP04405707 A EP 04405707A EP 04405707 A EP04405707 A EP 04405707A EP 1657359 A1 EP1657359 A1 EP 1657359A1
Authority
EP
European Patent Office
Prior art keywords
coating
ink
coating according
transition metal
catalyst system
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Withdrawn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
EP04405707A
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English (en)
French (fr)
Inventor
Bert Scholte
Jean-Pierre Haenen
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.)
Sappi Netherlands Services BV
Original Assignee
Sappi Netherlands Services BV
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 Sappi Netherlands Services BV filed Critical Sappi Netherlands Services BV
Priority to EP04405707A priority Critical patent/EP1657359A1/de
Priority to CNA2005800391447A priority patent/CN101072913A/zh
Priority to EP05811633A priority patent/EP1831458A1/de
Priority to CA 2587506 priority patent/CA2587506A1/en
Priority to US11/667,862 priority patent/US7871681B2/en
Priority to KR1020077008821A priority patent/KR20070085266A/ko
Priority to BRPI0516807-4A priority patent/BRPI0516807A/pt
Priority to PCT/EP2005/012249 priority patent/WO2006053719A1/en
Priority to JP2007540612A priority patent/JP2008520759A/ja
Priority to AU2005305982A priority patent/AU2005305982B2/en
Publication of EP1657359A1 publication Critical patent/EP1657359A1/de
Priority to NO20073082A priority patent/NO20073082L/no
Priority to US12/896,739 priority patent/US20110083573A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52—Macromolecular coatings
    • B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating

Definitions

  • the present invention relates to a coating composition in particular for sheet-fed lithographic offset printing paper, as well as to a paper coated with such a coating, and to methods for applying such a coating to a substrate.
  • wood-free coated fine paper is in the field of sheet-fed lithographic offset printing processes. There is a clear trend in this market towards shorter times to re-print and for converting in order to reduce the time of the production process and to facilitate handling.
  • Printers will have a clear advantage when paper can be almost instantly re-printed and converted (i.e. within 0.5 hours) as this is leading to a much higher efficiency of the process.
  • Workflow in the printing industry today has been fully digitized, enabling same-day processing of a complete print-job (like e.g. CD-inserts), provided that the print-process in itself would enable to do so.
  • the only component in the complete workflow that prevents speeding up of the full process is the interaction ink-paper, i.e. sufficient drying before converting.
  • ink drying time is the bottleneck or the rate determining step in the full sheet-fed lithographic offset printing process.
  • the shorter time to converting requires both an adequate physical drying component as well as a sufficient (but not necessarily 100% completed) chemical drying component of printed ink.
  • the physical drying component can e.g. be increased by adjustment of the porosity and/or of the surface energy of coating layers in a way that:
  • An induction period with respect to initial ink setting is necessary to avoid runnability problems on the press and to avoid loss in quality of the printed surface. Adjustment of surface energy appears also to be necessary to obtain superior print quality.
  • the quickset inks involved in general are mainly composed of ink colour pigment, resin, drying oil (which is a vegetable or biological oil) and a high boiling hydrocarbon (mineral) solvent (e.g. for adjusting the total flow characteristics).
  • ink colour pigment which is a vegetable or biological oil
  • drying oil which is a vegetable or biological oil
  • a high boiling hydrocarbon (mineral) solvent e.g. for adjusting the total flow characteristics.
  • such 'set' ink film is sufficiently rigid to withstand limited mechanical forces and enables the sheet to be re-printed on the second side of the sheet very soon after completing the first side.
  • its rigidity usually has not well developed enough for 'safe' instantaneous further handling or converting (e.g. folding, cutting) of the printed paper without damaging printed images. In fact several hours up to a day or more might be needed before these next converting steps can be performed. In order to keep printing process economics viable, it is essential for printers to have this interval time minimised.
  • a well-known present method is to start up an additional chemical drying step of the printed ink layer, a so-called oxidative polymerisation or cross-linking reaction.
  • Both the vegetable drying oil part, e.g. linseed oil and the resin part are partly based upon (preferentially conjugated) unsaturated fatty acids.
  • Oxygen in the air adds to the double bonds of these fatty acids and resins to initially form hydroperoxides. After consecutive degradation of these hydroperoxides the resulting free radicals are very reactive. These radicals attack other fatty acid molecules and attach, forming new (larger) free radicals. This causes polymerisation to finally form a cross-linked ink network.
  • the rate-determining step, formation and degradation of hydroperoxides can appreciably be speeded up by the presence of special catalytic species (so-called primary/secondary/auxiliary driers or siccatives) in the ink.
  • catalytic species such as primary/secondary/auxiliary driers or siccatives
  • fatty acid salts e.g. naphtenates or octoates
  • transition type metals like cobalt
  • the present regular working method of printers therefore is to add so-called drier systems to the ink prior to the printing to speed up chemical drying.
  • This has several drawbacks. For instance a practical point is the appreciable reduction of the so-called 'open time' of the ink system, requesting a printer to clean-up the printing machine at the end of every regular 8h working day cycle, or toxic anti-skinning agents like e.g. oximes have to be added to the ink.
  • Another drawback is that a printer is forced to deal not only with standard ink but also to use several types of (more expensive) printing inks with an added drier system, depending on the absorptive and other printing properties of respective paper qualities.
  • the objective problem underlying the present invention is therefore to provide improvements for the printing process, in particular improvements allowing to reduce the time which has to be waited until the printed sheet-fed paper can be further treated or converted.
  • the present invention solves the above problem by providing a coating for an offset paper comprising a catalyst system for fixing polymerizable or crosslinkable constituents of the offset ink.
  • catalyst system shall be understood a system comprising one or several (as a mixture) catalyts or catalytically active components including additives, ligands, salts etc. supporting the total activity of the catalyst system.
  • the object of the present invention is therefore a coating according to claim 1, a paper according to claim 26, a method according to claim 28 as well as a use according to claim 30.
  • the key feature of the invention is therefore the fact that surprisingly it is possible to incorporate in particular water-dispersible or water-soluble catalytic primary drier systems, preferentially combined with a well-balanced ligand/chelate system, into the top coat layer (or also or in the alternative into a middle coating, e.g. in order to hide sometimes possibly slightly coloured catalyst systems behind the top coat) of for example a wood free coated grade for sheet-fed offset.
  • a middle coating e.g. in order to hide sometimes possibly slightly coloured catalyst systems behind the top coat
  • the catalyst catalyzes the oxidative polymerisation or the crosslinking of unsaturated constituents of offset ink printed onto the coating.
  • the catalyst fixes fatty acid and resin parts of the offset ink.
  • the drying time of offset printing ink applied to such a coating can be reduced below 2h, even below 1h, and in some cases to values equal or below 0.5h.
  • the catalyst is a transition metal complex, wherein preferentially the metal ion of the transition metal complex is selected from the group of Ti, V, Cr, Mn, Fe, Co, Ce, Cu, or a mixture thereof.
  • primary drier catalysts which are based on a transition metal selected from the group of Mn, V, Fe or a mixture thereof, wherein in particular Mn alone proved to be particularly powerful and efficient.
  • secondary driers which are additionally present.
  • Such secondary driers can be based on Pb, Bi, Ba, Al, Sr, Zr e.g. in ionic form as salts, complexes or the like.
  • auxiliary driers are additionally added like e.g. Ca, Zn, Li, K, again in ionic form as salts, complexes or the like.
  • the transition metal complex which is used as the catalyst is a carboxylate and/or a naphthenate complex.
  • carboxylates with an alkyl chain of 2-18 carbon atoms, preferably of 6-12 carbon atoms, which may be unsubstituted or substituted can be shown to be efficient.
  • a particularly suitable system is a 2-ethylhexanoate-complex, in particular a Mn 2-ethylhexanoate-complex.
  • the naphthenic acid anion has an alkyl chain of 1-12 carbon atoms, preferably of 4-8 carbon atoms, and the alkyl chain as well as the cyclopentane unit may be unsubstituted or substituted.
  • the transition metal complex used as the catalyst comprises or is supplemented by at least one bidentate ligand.
  • a bidentate ligand can advantageously be used in combination with the above-mentioned carboxylate or naphthenate ligand system.
  • Particularly useful are bidentate systems which lead to chelate-rings with e.g. 5 atoms.
  • the atoms which are used for providing the link to the metal atom may be selected from the group N, O, S, and/or P or combinations thereof. Therefore, useful bidentate systems include organic molecules with appropriate sp3 or sp2 hybridised N-atoms and/or O-atoms which are available for forming a bond to the metal atom.
  • ligands in the form of a diamine or alkanolamines like for example selected from the group 2,2'-bipyridine, 2-aminomethylpyridine, 2-hydroxymethylpyridine, or 1,10 phenanthroline, which may be substituted or unsubstituted.
  • the ligands are preferably substituted by side groups, which increase the stability and/or increase the solubility or dispersibility of the catalyst system in water, which is important since coatings are deposited onto a substrate on a water basis.
  • a particularly suitable system is given by a catalyst consisting of or comprising a Mn 2,2'-bipyridine system, in which e.g. Mn is present as a salt complex and additionally bpy is present, typically in slight molar excess.
  • Mn is present as a salt complex and additionally bpy is present, typically in slight molar excess.
  • a system can be provided as a combined system with a Mn carboxylate or a Mn naphthenate, suitable is for example a combination of Mn 2-ethylhexanoate with (Mn) 2,2'-bipyridine.
  • the catalyst i.e. the metal part of the primary drier complex
  • the catalyst is present in the coating in 0.01 - 0.5 weight-% of the total dry weight of the top paper coating, preferably in 0.05-0.2 weight-% of the total dry weight of the coating.
  • the transition metal complex preferentially comprises at least one bidentate ligand and the ratio of metal to ligand is in the range of 1:1 - 1:8.
  • additives for increasing the solubility/dispersibility of the transition metal complex and the ligands present can e.g. be chosen from alcohols or glycol-ethers like e.g. 1-methoxy-2-propanol or propylene-glycol-monomethyl-ether. Those additives can either be added to the coating formulation or they can be added to the solution/dispersion of the transition metal complex prior to its introduction into the coating formulation.
  • the present concept can be applied to any (aqueous) coating formulation. It however proves to be advantageous if the coating has a high degree of porosity and an appropriate morphology of the porosity and/or appropriate surface energy of pore walls.
  • the coating comprises 100 parts in dry weight of pigment substantially supplemented by 5-20 parts in dry weight binder and additives like lubricants, thickener etc., wherein the pigment part comprises ultra-fine CaCO 3 and/or kaolin or clay wherein up to 10-20 parts may be substituted by synthetic solid or vacuolated polymeric pigments which may e.g.
  • SMA Styrene maleic acid copolymeric latexes
  • SMI styrene malimide copolymeric latexes
  • the catalyst is only added to the top coating, it may however also be added to layers which are beneath the top coat.
  • the top coat comprising the catalyst system typically has a thickness in the range of 10-30g/m 2 , preferably in the range of 10-15 g/m 2 .
  • the present invention additionally pertains to a paper coated with a coating as given above, preferentially as a top coat.
  • Beneath such a top coat there is preferably an additional coating, which in particular supports the physical absorption process of the ink in the layers structure.
  • Possible is a formulation of the additional middle coating as follows: 100 parts in dry weight fine CaCO 3 ; 5-10 parts styrene butadiene synthetic binder; 1 part lubricant; 1 part modified starch; 1 part PVA; 1 part CMC.
  • the present invention relates to a method for the production of a coating as given above, wherein the transition metal complex is added, preferentially as an aqueous solution or dispersion, to a stirred coating formulation, and the final coating formulation is coated onto a paper substrate.
  • the coating process can be carried out using regular techniques like a blade coater, a roll coater, a spray coater, a curtain coater or other coater systems, and the paper may be calendered after the coating process.
  • a chelating agent preferably in excess to the transition metal content (on a molar basis) is added to the coating formulation, wherein the chelating agent is added as an aqueous solution or dispersion and may contain one or several additives (cosolvents using the sulubilization principle) to increase the solubility/dispersibility or to increase the stability of the catalyst system.
  • the present invention relates to the use of a catalyst for fixing polymerizable or crosslinkable constituents of the offset ink as an additive for a coating.
  • a catalyst for fixing polymerizable or crosslinkable constituents of the offset ink as an additive for a coating.
  • Such a catalyst is preferentially a water soluble or water dispersible transition metal complex, and has the characteristics as outlined above.
  • the active drier complex is assumed to be an octahedral surrounded mono-metal/ligand complex, 1 to (maximum) 8 moles bpy versus 1 mole manganese metal should be possible. It is however presumed that the complex is a polynuclear complex with several metal atoms within one moiety.
  • Topcoat plus incorporated drier have been applied with available Bird applicator or with a lab-scale pilot coater onto one side of dual coated A or B substrate. Applied topcoat amount was tested as about 15 g/m 2 /side with layer thickness about 11-12 ⁇ m. This fits well in with mill practice for these topcoats.
  • printing ink (black) Tempo max or (blue) Bio 2 is applied onto paper samples at sketchbau printing device according to directions of ESTM 2302, Multicolour ink setting, revision 0 of 11-2-2004. It means 0.24 g ink, printing pressure 1000N, printing speed 0.5 m/s, with aluminium printing reels and with standard long sample carrier.
  • Print ink layer thickness was measured as about 1 - 2 ⁇ m.
  • Part I Pre-assessment of intrinsic catalytic ink drying activity of used manganese dryer product Nuodex Web Mn9 added to the ink.
  • topcoat composition The required amounts manganese complex (0, 0.05, 0.1 and 0.5 wt.-% Mn9 given as weight % of metal of the primary drier compared to dry weight coating formulation) as Nuodex Web Mn9 were mixed into topcoat composition (see above).
  • Treated topcoat was Bird applied to middle-coated paper substrate for 250 gsm end paper: A and B. End paper was laboratory printed and tested for drying behaviour.
  • Part III Incorporation of Mn- (2-ethylhexanoate, bpy) catalytic dryer complex in paper topcoat to enhance chemical ink drying performance
  • Fig. 2 gives the chemical ink drying performance of printed Black tempo max ink on laboratory made 'regular' MagnoStar with incorporated Mn- (2-ethylhexanoate, bpy) dryer complex in topcoat as a function of the bpy content.
  • Fig. 4 gives the chemical ink drying performance of printed Bio 2 ink on laboratory made 'regular' MagnoStar with incorporated Mn- (2-ethylhexanoate,bpy) dryer complex in topcoat.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Paper (AREA)
EP04405707A 2004-11-16 2004-11-16 Beschichtungszusammensetzung für Offsetpapier Withdrawn EP1657359A1 (de)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP04405707A EP1657359A1 (de) 2004-11-16 2004-11-16 Beschichtungszusammensetzung für Offsetpapier
KR1020077008821A KR20070085266A (ko) 2004-11-16 2005-11-15 옵셋 용지용 코팅 조성물
EP05811633A EP1831458A1 (de) 2004-11-16 2005-11-15 Streichfarbe für offsetpapier
CA 2587506 CA2587506A1 (en) 2004-11-16 2005-11-15 Coating composition for offset paper
US11/667,862 US7871681B2 (en) 2004-11-16 2005-11-15 Coating composition for offset paper
CNA2005800391447A CN101072913A (zh) 2004-11-16 2005-11-15 用于胶版印刷纸的涂料组合物
BRPI0516807-4A BRPI0516807A (pt) 2004-11-16 2005-11-15 revestimento para papel offset e papel revestido com o mesmo, método para produção desse revestimento e uso de um sistema catalisador
PCT/EP2005/012249 WO2006053719A1 (en) 2004-11-16 2005-11-15 Coating composition for offset paper
JP2007540612A JP2008520759A (ja) 2004-11-16 2005-11-15 オフセット印刷紙用塗料
AU2005305982A AU2005305982B2 (en) 2004-11-16 2005-11-15 Coating composition for offset paper
NO20073082A NO20073082L (no) 2004-11-16 2007-06-15 Bestrykningsmasse for offset-papir
US12/896,739 US20110083573A1 (en) 2004-11-16 2010-10-01 Coating composition for offset paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405707A EP1657359A1 (de) 2004-11-16 2004-11-16 Beschichtungszusammensetzung für Offsetpapier

Publications (1)

Publication Number Publication Date
EP1657359A1 true EP1657359A1 (de) 2006-05-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405707A Withdrawn EP1657359A1 (de) 2004-11-16 2004-11-16 Beschichtungszusammensetzung für Offsetpapier

Country Status (2)

Country Link
EP (1) EP1657359A1 (de)
CN (1) CN101072913A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8318836B2 (en) 2006-07-07 2012-11-27 Omg Uk Technology Limited Liquid hardening
CN104499379A (zh) * 2014-12-31 2015-04-08 东莞市汇林包装有限公司 一种防掉粉纸浆模塑的制备方法
CN105220562A (zh) * 2015-09-29 2016-01-06 河南江河纸业股份有限公司 一种使用高比例化机浆生产的微涂双胶纸及其生产方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2103736B1 (de) * 2008-03-18 2016-05-25 Agfa-Gevaert N.V. Bedruckbares Papier, Verfahren zur Herstellung von bedruckbarem Papier und sein Einsatz
JP4900543B1 (ja) * 2010-06-14 2012-03-21 Ｄｉｃ株式会社 印刷インキ用ドライヤー及びそれを用いた印刷インキ
CN111379194B (zh) * 2018-12-29 2022-05-31 上海紫丹食品包装印刷有限公司 涂料组合物、防爆纸转移镭射卡纸基材及制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60161461A (ja) * 1984-01-31 1985-08-23 Dainichi Seika Kogyo Kk 化粧シ−ト用トツプコ−ト剤
WO2001054914A2 (en) * 2000-01-27 2001-08-02 Sappi Maastricht B.V. Method for reducing back trap mottle and paper with reduced sensitivity for back trap mottle
WO2004030917A1 (en) * 2002-10-01 2004-04-15 Sappi Netherlands Services B.V. Coated printing sheet and process for making same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60161461A (ja) * 1984-01-31 1985-08-23 Dainichi Seika Kogyo Kk 化粧シ−ト用トツプコ−ト剤
WO2001054914A2 (en) * 2000-01-27 2001-08-02 Sappi Maastricht B.V. Method for reducing back trap mottle and paper with reduced sensitivity for back trap mottle
WO2004030917A1 (en) * 2002-10-01 2004-04-15 Sappi Netherlands Services B.V. Coated printing sheet and process for making same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 331 (C - 321) 25 December 1985 (1985-12-25) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8318836B2 (en) 2006-07-07 2012-11-27 Omg Uk Technology Limited Liquid hardening
US8492461B2 (en) 2006-07-07 2013-07-23 Omg Uk Technology Ltd. Liquid hardening
US8497314B2 (en) 2006-07-07 2013-07-30 Omg Uk Technology Ltd. Liquid hardening
US8642685B2 (en) 2006-07-07 2014-02-04 OMG UK Technology, Ltd Liquid hardening
US8664306B2 (en) 2006-07-07 2014-03-04 Omg Uk Technology Ltd. Liquid hardening
US9593232B2 (en) 2006-07-07 2017-03-14 Omg Uk Technology Ltd. Liquid hardening
CN104499379A (zh) * 2014-12-31 2015-04-08 东莞市汇林包装有限公司 一种防掉粉纸浆模塑的制备方法
CN104499379B (zh) * 2014-12-31 2017-02-22 东莞市汇林包装有限公司 一种防掉粉纸浆模塑的制备方法
CN105220562A (zh) * 2015-09-29 2016-01-06 河南江河纸业股份有限公司 一种使用高比例化机浆生产的微涂双胶纸及其生产方法
CN105220562B (zh) * 2015-09-29 2018-01-19 河南江河纸业股份有限公司 一种使用高比例化机浆生产的微涂双胶纸及其生产方法

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