EP0274666B1 - Compositions de couchage pour papier comprenant des agents de blanchiment - Google Patents

Compositions de couchage pour papier comprenant des agents de blanchiment Download PDF

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Publication number
EP0274666B1
EP0274666B1 EP87118124A EP87118124A EP0274666B1 EP 0274666 B1 EP0274666 B1 EP 0274666B1 EP 87118124 A EP87118124 A EP 87118124A EP 87118124 A EP87118124 A EP 87118124A EP 0274666 B1 EP0274666 B1 EP 0274666B1
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EP
European Patent Office
Prior art keywords
water
formula
fluorescent brightener
salt
paper
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
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EP87118124A
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German (de)
English (en)
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EP0274666A1 (fr
Inventor
Jochen Dr. Koll
Friedhelm Dr. Müller
Werner Bieber
Joachim Dr. König
Udo Dr. Eckstein
Hans Dr. Theidel
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Bayer AG
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Bayer AG
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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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching

Definitions

  • aqueous coating slips are used to a very large extent, which in addition to the usual white pigments - especially china clay and calcium carbonate - contain plastic dispersions as binders.
  • whiteners of the alkali salt type of bistriazonylaminostilbene-disulfonic acids are generally used.
  • these whiteners only have very unsatisfactory brightening effects and a very low graying limit (whitener concentration, at which further addition of the whitener does not result in an increase or even a decrease in the whiteness).
  • the white toner types mentioned have a very low light fastness in those coating slips.
  • this brightener salt for the stated purpose must be regarded as extremely surprising, since it is known that water-soluble brighteners based on bistriazonyl-aminostilbene-disulfonic acids, when used with conventional poly-cationic products according to GB-A-721 238 and GB-A -1 058 918 can be precipitated, in cobinder-free paper coating slips none or only very much unsatisfactory effect and the brightener salts mentioned in JP-A-57 123 262 have a significantly lower degree of whiteness (CIE).
  • CIE degree of whiteness
  • the brightener salt according to the invention shows a more or less pronounced fluorescence in finely divided or dissolved additive, even if the cationic component is used in excess.
  • the reaction takes place in water and / or organic solvents, such as methanol, ethanol, propanol, isopropanol, butanol, glycol, glycol methyl ether, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, sulfolane, hexamethylphosphoric triamide at temperatures from 20 ° C. to the reflux temperature of the corresponding solvent.
  • organic solvents such as methanol, ethanol, propanol, isopropanol, butanol, glycol, glycol methyl ether, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, sulfolane, hexamethylphosphoric triamide
  • the poorly soluble whitening salt obtained in this way can be used as a whitening agent directly or after prior fine grinding or liquid formation.
  • the dispersions according to the invention can be prepared as follows: The press cakes and / or powders are homogenized with vigorous stirring after the addition of a surface-active substance and optionally water. The amount of the surface-active substance can then be increased, if necessary to the total amount required for the stability of the dispersion.
  • the suspension obtained is then comminuted and wet-ground.
  • Pre-shredding can be carried out using stone or tooth colloid mills.
  • the subsequent wet comminution can take place in colloid, vibratory, cone and vibromills as well as in dissolvers or in sub-micron dispersers.
  • continuous agitator mills with grinding media preferably those made of SiO2 of 0.2 to 5 mm in diameter, are preferably used.
  • surface-active substances or hydrotropic substances such as e.g. Ethylene glycol or glycerin, preservatives, wetting agents, defoamers and / or water are added, unless this has been done at an earlier point in time e.g. before grinding.
  • a further possibility of producing the brightening agent according to the invention, which is sparingly or insoluble in water, and its dispersions, is the combination of the reaction and grinding process:
  • the alkali salt of the brightener according to formula (II) is wet-comminuted together with the basic nitrogen compound of formula (III) and water and surface-active substances after homogenization and pre-comminution, the amounts used being able to be varied, as indicated above.
  • the complete reaction of the whitening salt II with the basic nitrogen compound III takes place in the grinder, preferably in a continuous agitator mill with SiO 2 grinding media.
  • Suitable surface-active substances are all customary, cationic and nonionic surface-active substances, as are described, for example, in DE-A 2 334 769, pages 8 to 10 (corresponds to GB-A 1 417 071).
  • Nonionic surfactants are preferably used.
  • the paper coating slips into which the brightener salts to be used according to the invention are incorporated are structured as follows: plastic dispersions based on styrene-butadiene, carboxylated styrene-butadiene or polyvinyl acetate copolymers or of acrylic acid esters in combination with white pigments, both with and without low levels of hydrophilic co-binders.
  • the amount of compound I used depends on the desired lightening effect. In general, 0.01 to 0.5% by weight of pure active substance (based on the solids of the paper coating slip to be lightened) is sufficient.
  • a particular advantage is that, depending on the composition of the coating slip, the graying limit that can be achieved (up to which a further brightener additive brings additional effects) is extremely high.
  • 200 g of the water-insoluble brightener salt prepared according to Example 1 are homogenized together with 200 g of emulsifier W and 600 g of water and comminuted using a toothed colloid mill. The suspension is then wet crushed in a bead mill at room temperature with 4 passes. The resulting stable dispersion is easy to incorporate into paper coating slips and shows excellent white effects, even when large amounts are added (cf. Example 4).
  • the suspension is wet-crushed at room temperature with 4 passes in a bead mill and shows excellent white effects after incorporation into paper coating slips.
  • coated papers After spreading the lightened coating slip onto paper with the help of a hand-held squeegee or a test coater and after drying at 20-130 ° C, coated papers are obtained which, depending on the brightener additive, have a clear to excellent brightening effect. An increase in the degree of whiteness can usually still be achieved even with brightener additives higher than 50 g / kg of coating slip.

Claims (4)

  1. Compositions aqueuses de couchage du papier à base de dispersions de matières plastiques contenant un sel d'agent de blanchiment de formule (I)
    Figure imgb0011
  2. Procédé de préparation de compositions de couhage selon la revendication 1, caractérisé en ce que l'on fait réagir un agent de blanchiment optique de formule (II)
    Figure imgb0012
     ou un de ses sels solubles dans l'eau avec un composé azoté basique de formule (III)
    Figure imgb0013
     dans laquelle y représente un anion hydrosolubilisant incolore non fluorescent ou OH, on isole le sel d'agent de blanchiment pratique-insoluble dans l'eau précipité et on l'incorpore dans une composition de couchage.
  3. Procédé selon la revendication 2, caractérisé en ce que l'on soumet le sel d'agent de blanchiment peu soluble à un broyage à l'état humide en présence de substances tensioactives.
  4. Procédé selon la revendication 2, caractérisé en ce que l'on soumet l'agent de blanchiment optique à un broyage à l'état humide avec le composé azoté basique et les substances tensioactives.
EP87118124A 1986-12-18 1987-12-08 Compositions de couchage pour papier comprenant des agents de blanchiment Expired - Lifetime EP0274666B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3643215 1986-12-18
DE19863643215 DE3643215A1 (de) 1986-12-18 1986-12-18 Weisstoenerhaltige papierstreichmassen

Publications (2)

Publication Number Publication Date
EP0274666A1 EP0274666A1 (fr) 1988-07-20
EP0274666B1 true EP0274666B1 (fr) 1992-03-25

Family

ID=6316456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118124A Expired - Lifetime EP0274666B1 (fr) 1986-12-18 1987-12-08 Compositions de couchage pour papier comprenant des agents de blanchiment

Country Status (5)

Country Link
US (1) US4888128A (fr)
EP (1) EP0274666B1 (fr)
JP (1) JPS63165596A (fr)
DE (2) DE3643215A1 (fr)
FI (1) FI87378C (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9000850A (pt) * 1989-02-28 1991-02-05 Ciba Geigy Ag Formulacao aclaradora estavel a armazenagem,processo para sua preparacao e aplicacao
NO903004L (no) * 1989-07-21 1991-01-22 Bayer Ag Fremgangsmaate for hvittoning av papirbestrykningsmasser samt hvittoningspreparater for fremgangsmaaten.
IT1246376B (it) * 1990-04-11 1994-11-18 Sigma Prodotti Chimici Srl Patina per carta
GB2277749B (en) * 1993-05-08 1996-12-04 Ciba Geigy Ag Fluorescent whitening of paper
DE19500195A1 (de) * 1995-01-05 1996-07-11 Bayer Ag Verwendung weißgetönter Kunststoffe zum Weißtönen von Papierstreichmassen und derart weißgetönte Papierstreichmassen
EP0905317B1 (fr) * 1997-09-16 2009-12-23 Basf Se Procédé d'azurage optique de papier
NZ331438A (en) 1997-09-16 2000-01-28 Ciba Sc Holding Ag A method of increasing the whiteness of paper by using a formulation containing a swellale layered silicate and an optical brightener 4,4-bis-(triazinylamino)-stilbene-2,2-disulphonic acid
JPH11130975A (ja) * 1997-10-29 1999-05-18 Hakkooru Chemical Kk 隠ぺい性の優れた蛍光性有機白色顔料組成物
US5948153A (en) * 1998-04-24 1999-09-07 Milliken & Company Water-soluble complexes of optical brighteners and quaternary ammonium compounds which are substantially free from unwanted salts
US6046330A (en) * 1998-04-24 2000-04-04 Qinghong; Jessica Ann Complexes of ultraviolet absorbers and quaternary ammonium compounds which are substantially free from unwanted salts
GB9813248D0 (en) 1998-06-22 1998-08-19 Clariant Int Ltd Improvements in or relating to organic compounds
GB9930177D0 (en) * 1999-12-22 2000-02-09 Clariant Int Ltd Improvements in or relating to organic compounds
GB9930247D0 (en) 1999-12-22 2000-02-09 Clariant Int Ltd Improvements in or relating to organic compounds
EP1392925A1 (fr) * 2001-05-29 2004-03-03 Ciba SC Holding AG Composition de blanchiment fluorescent du papier
EP1624034B1 (fr) * 2003-05-02 2011-06-15 Canon Kabushiki Kaisha Encre fluorescente aqueuse, image imprimee utilisant cette encre et procede d'evaluation
CN1882626A (zh) * 2003-11-18 2006-12-20 西巴特殊化学品控股有限公司 荧光增白颜料
EP1712677A1 (fr) * 2005-04-08 2006-10-18 Clariant International Ltd. Solutions aqueuses d'azurants optiques

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1441109A (en) * 1973-01-23 1976-06-30 Ici Ltd Coating compositions
CH582275A5 (fr) * 1973-02-02 1976-11-30 Ciba Geigy Ag
JPS5725364A (en) * 1980-07-22 1982-02-10 Showa Kagaku Kogyo Kk Dyestuff salt
JPS5725365A (en) * 1980-07-22 1982-02-10 Showa Kagaku Kogyo Kk Dyestuff salt-containing fluorescent brightener composition
JPS57123262A (en) * 1981-01-26 1982-07-31 Showa Kagaku Kogyo Kk Fluorescent brightener composition
CH647021A5 (de) * 1981-09-22 1984-12-28 Ciba Geigy Ag Verfahren zur herstellung lagerstabiler aufhellerformulierungen.
DE3502038A1 (de) * 1985-01-23 1986-07-24 Sandoz-Patent-GmbH, 7850 Lörrach Waessrige aufhellerpraeparate und deren verwendung im papierstrich

Also Published As

Publication number Publication date
JPS63165596A (ja) 1988-07-08
FI87378C (fi) 1992-12-28
FI875517A (fi) 1988-06-19
EP0274666A1 (fr) 1988-07-20
US4888128A (en) 1989-12-19
DE3643215A1 (de) 1988-06-30
FI87378B (fi) 1992-09-15
DE3777789D1 (de) 1992-04-30
FI875517A0 (fi) 1987-12-16

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