EP0801700B1 - Verwendung weissgetönter kunststoffe zum weisstönen von papierstreichmassen und derart weissgetönte papierstreichmassen - Google Patents

Verwendung weissgetönter kunststoffe zum weisstönen von papierstreichmassen und derart weissgetönte papierstreichmassen Download PDF

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Publication number
EP0801700B1
EP0801700B1 EP95943210A EP95943210A EP0801700B1 EP 0801700 B1 EP0801700 B1 EP 0801700B1 EP 95943210 A EP95943210 A EP 95943210A EP 95943210 A EP95943210 A EP 95943210A EP 0801700 B1 EP0801700 B1 EP 0801700B1
Authority
EP
European Patent Office
Prior art keywords
weight
white
plastics
paper
optically
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
Application number
EP95943210A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0801700A1 (de
Inventor
Udo Eckstein
Joachim König
Fritz Puchner
Ulrich Feldhues
Matthias KÖCHER
Uwe Vogt
Eckhard Wenderoth
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Priority to SI9530524T priority Critical patent/SI0801700T1/xx
Publication of EP0801700A1 publication Critical patent/EP0801700A1/de
Application granted granted Critical
Publication of EP0801700B1 publication Critical patent/EP0801700B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • D21H21/28—Colorants ; Pigments or opacifying agents
    • D21H21/285—Colorants ; Pigments or opacifying agents insoluble
    • 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/42—Coatings with pigments characterised by the pigments at least partly organic
    • 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

  • the invention relates to white-tinted fine-particle plastics their use for tinting white of paper coating slips based on synthetic binders and paper coating slips, which contain such white-tinted plastics.
  • binders for paper coating slips include, for example, butadiene / styrene, styrene / butyl acrylate, Acrylonitrile / butadiene / styrene, styrene / butadiene / acrylic acid alkyl ester, Acrylic acid alkyl ester, ethylene / vinyl chloride and ethylene / vinyl acetate copolymers as well as the homopolymers polyethylene, polyvinyl chloride, polyvinylidene chloride, Polyvinyl acetate and polyaddition compounds such as polyurethanes.
  • Water-soluble white toners have also been condensed with aminoplasts and these condensates are particularly recommended for whitening paper coating slips (DE-A-3 112 435). However, these suggestions have been due to insufficient lightfastness and cannot enforce rheological difficulties.
  • the invention thus relates to white-tinted, finely divided plastics from the series Polyacrylonitrile and their use for whitening paper coating slips Basis of synthetic binders.
  • Another object of the invention are with the help of these white-tinted plastics white-colored paper coating slips.
  • Plastics include polyacrylonitriles.
  • Preferred polyacrylonitriles have intrinsic viscosities (measured in dimethylformamide at 20 ° C) from 1.18 to 2.22 dl / g.
  • fine-particle are plastic powders with a (as weight average determined) particle size of less than 1 micron.
  • Preferred White tones result in comparatively high light fastness on textile fibers - Measured in the Xenotest based on the guidelines for determining the Color fastness according to DIN 54004 - from at least 4, preferably from 5 to 7.
  • the white-tinted plastics contain white-tinted polyacrylonitrile with white tones of the formulas (1) or (2).
  • the fine-particle white-tinted plastics can be powdered into the paper coating slips be incorporated. In most cases, however, it should be more convenient to use the finely divided plastics before or after the application of the whitener in aqueous Disperse phase and, if necessary, after the white toner is applied has been, the aqueous plastic dispersion obtained in the paper coating slips to incorporate.
  • plastic dispersions can A) 1 to 30 wt .-%, preferably 5 to 25% by weight of the whitened polymers, B) 1 to 50% by weight, preferably 5 to 20% by weight of surface-active substances, C) 0 to 15% by weight of preservative and D) Contain 20 to 98 wt .-%, preferably 55 to 90 wt .-% water, with up to Half of the water from hydrotropic substances, e.g. Ethylene glycol or glycerin can be replaced and the percentages are based on the sum of A + B + D Respectively.
  • hydrotropic substances e.g. Ethylene glycol or glycerin
  • Anionic, cationic and / or nonionic can be used as surface-active substances surface-active substances are used, such as in methods of Organic Chemistry (Houben-Weyl), 4th ed., Vol. XIV / I, Georg Thieme Verlag, Stuttgart 1961, p. 190 f. and in DE-A-2 334 769, pages 8 to 10 (GB-A-1 417 071).
  • Dispersions of the invention Fine-particle white-tinted plastics can be used, for example, as follows getting produced:
  • the powdery polymers are first treated with those for the selected one Suitable white toners in aqueous systems at temperatures from 60 ° C to to the cooking temperature until the whiteners are completely drawn onto the substrate. If necessary, additional aids are used.
  • the white tones can also be melted onto the corresponding ones Polymer materials are fixed.
  • the amount of white toner used on the substrate depends on the desired lightening effect; it is between 0.01 and 5% by weight of pure active substance, based on the plastic used (solid).
  • the isolated white-tinted plastic powder is then homogenized after the addition of a surface-active substance and, if appropriate, water, with vigorous stirring.
  • 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 ground wet. Pre-crushing can be done 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 SiO 2 with a diameter of 0.2 to 5 mm, are preferably used.
  • the isolated white-tinted plastic powder can also be used after dry grinding can be incorporated directly into the paper coating slips.
  • a particularly advantageous option is a dispersion of white-tinted plastic
  • the combination of the whitening process and the grinding process represents:
  • the powdered plastic is comminuted wet together with the corresponding white toner, water and surface-active substances at temperatures from 60 ° C. to the boiling temperature, if appropriate after homogenization and pre-comminution, as described above.
  • the complete brightening takes place during the grinding process in the grinder, preferably in a continuous agitator mill with SiO 2 grinding media.
  • the amount of white toner used in the paper coating slip depends on the target White effect. In general, 0.01 to 0.5% by weight of pure white toner is sufficient (based on the solids of the paper coating slip to be lightened). A special The advantage is that, depending on the coating composition, the attainable graying limit is extremely high.
  • Example 3 Paper coating slip (not according to the invention)
  • the coating slips 3 and 4 a) -c) are applied to paper with the aid of a hand-held squeegee or an experimental coating system and dried at 80.degree.
  • Table 2 shows the degree of whiteness CIE of the papers after production and after exposure (1 week in daylight). example White tone usage control in % Whiteness CIE Whiteness drop due to exposure before exposure after exposure 3) without WT 71.4 71 0.4 4 a) 0.037 94.4 93.2 1.5 4 b) 0.065 101.8 100.8 1 4 c) 0.088 107.4 106.1 1.3
  • the papers according to the invention show a very low concentration of white toner both an increased degree of whiteness and a significantly improved light fastness.

Landscapes

  • Paper (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)
EP95943210A 1995-01-05 1995-12-27 Verwendung weissgetönter kunststoffe zum weisstönen von papierstreichmassen und derart weissgetönte papierstreichmassen Expired - Lifetime EP0801700B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9530524T SI0801700T1 (en) 1995-01-05 1995-12-27 Use of optically brightened plastics for optically brightening paper-coating compounds and paper-coating compounds optically brightened in this manner

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19500195A DE19500195A1 (de) 1995-01-05 1995-01-05 Verwendung weißgetönter Kunststoffe zum Weißtönen von Papierstreichmassen und derart weißgetönte Papierstreichmassen
DE19500195 1995-01-05
PCT/EP1995/005133 WO1996021062A1 (de) 1995-01-05 1995-12-27 Verwendung weissgetönter kunststoffe zum weisstönen von papierstreichmassen und derart weissgetönte papierstreichmassen

Publications (2)

Publication Number Publication Date
EP0801700A1 EP0801700A1 (de) 1997-10-22
EP0801700B1 true EP0801700B1 (de) 2001-11-14

Family

ID=7751028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95943210A Expired - Lifetime EP0801700B1 (de) 1995-01-05 1995-12-27 Verwendung weissgetönter kunststoffe zum weisstönen von papierstreichmassen und derart weissgetönte papierstreichmassen

Country Status (7)

Country Link
US (1) US6387296B1 (ja)
EP (1) EP0801700B1 (ja)
JP (1) JPH10512626A (ja)
AT (1) ATE208843T1 (ja)
DE (2) DE19500195A1 (ja)
FI (1) FI972850A0 (ja)
WO (1) WO1996021062A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085337A1 (en) * 2006-01-26 2007-08-02 Clariant International Ltd Process for producing optically brightened paper

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644014C2 (de) * 1996-10-31 1999-07-22 Stora Publication Paper Ag Papier mit Aufzeichnungsschicht und Verfahren zu seiner Herstellung
DE19732032A1 (de) * 1997-07-25 1999-01-28 Bayer Ag Weißgetönte Polymerisate sowie ihre Verwendung in Streichmassen für die Beschichtung von Substraten
DE19732860A1 (de) * 1997-07-30 1999-02-04 Merck Patent Gmbh Lasermarkierbare Papiere und Kartonagen
FI103801B (fi) 1998-02-24 1999-09-30 Kemira Oyj Menetelmä pigmenttien valkaisemiseksi
BR0012946A (pt) 1999-08-05 2002-06-11 Ciba Sc Holding Ag Uso de pigmentos embranquecedores para embranquecimento de composições de revestimento de papel

Citations (2)

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Publication number Priority date Publication date Assignee Title
US4005098A (en) * 1968-03-16 1977-01-25 Bayer Aktiengesellschaft Triazolyl-coumarins
EP0074590A2 (de) * 1981-09-16 1983-03-23 Bayer Ag Präparationen optischer Aufheller

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BE568156A (ja) 1957-06-06
US3625952A (en) * 1967-01-20 1971-12-07 Farlenfabriken Bayer Ag 7-triazolyl-3-phenyl-coumarins
CH530440A (de) * 1969-06-13 1972-11-15 Ciba Geigy Ag Verwendung einer Verbindung der Cumarinylstryryltriazolreihe zum optischen Aufhellen von nichtextilen organischen Materialien
US4055565A (en) * 1969-12-30 1977-10-25 Sumitomo Chemical Company, Limited Optical brightening agents of naphthalimide derivatives
US3684764A (en) * 1970-04-13 1972-08-15 Bennett George Buell Brightening polyvinyl chloride and polyolefin plastics with 2-naphthylnaphthoxazoles
GB1294173A (en) 1970-06-02 1972-10-25 Ici Ltd Coating compositions
GB1349934A (en) 1970-08-13 1974-04-10 Ici Ltd Coating process
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GB1399632A (en) 1972-07-13 1975-07-02 Leo Pharm Prod Ltd Sulphamoyl-benzoic acids
US3926963A (en) * 1973-04-20 1975-12-16 Ciba Geigy Ag New benzoxazolylstilbenes as optical brighteners
LU76819A1 (ja) * 1977-02-22 1978-10-18
DE2902470A1 (de) * 1979-01-23 1980-07-31 Bayer Ag Cumarin-verbindungen
DE2935638A1 (de) * 1979-09-04 1981-03-12 Hoechst Ag, 6000 Frankfurt Disazoverbindungen, verfahren zu ihrer herstellung und ihre verwendung als farbmittel.
US4386965A (en) 1980-07-03 1983-06-07 Ciba-Geigy Corporation Process for obtaining coating compositions of improved whiteness
JPS5725364A (en) * 1980-07-22 1982-02-10 Showa Kagaku Kogyo Kk Dyestuff salt
DE3112435A1 (de) 1981-03-28 1982-10-07 Bayer Ag, 5090 Leverkusen Waessrige aminoplastdispersionen
JPS5875151A (ja) * 1981-10-29 1983-05-06 Fuji Photo Film Co Ltd 写真印画紙用樹脂コ−テイング紙の製造方法
DE3502038A1 (de) 1985-01-23 1986-07-24 Sandoz-Patent-GmbH, 7850 Lörrach Waessrige aufhellerpraeparate und deren verwendung im papierstrich
JPH0610739B2 (ja) * 1985-04-12 1994-02-09 富士写真フイルム株式会社 写真印画紙用支持体およびその製法
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US4005098A (en) * 1968-03-16 1977-01-25 Bayer Aktiengesellschaft Triazolyl-coumarins
EP0074590A2 (de) * 1981-09-16 1983-03-23 Bayer Ag Präparationen optischer Aufheller

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007085337A1 (en) * 2006-01-26 2007-08-02 Clariant International Ltd Process for producing optically brightened paper

Also Published As

Publication number Publication date
US6387296B1 (en) 2002-05-14
DE59509850D1 (de) 2001-12-20
FI972850A (fi) 1997-07-03
WO1996021062A1 (de) 1996-07-11
FI972850A0 (fi) 1997-07-03
ATE208843T1 (de) 2001-11-15
JPH10512626A (ja) 1998-12-02
DE19500195A1 (de) 1996-07-11
EP0801700A1 (de) 1997-10-22

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