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
• • 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
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/20—Macromolecular organic compounds
  • D21H17/33—Synthetic macromolecular compounds
  • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
  • D21H17/375—Poly(meth)acrylamide

Definitions

• the present invention relates to a new process for coloring paper in bulk with pigments and fixing agents, pigment and fixing agent being added simultaneously to the paper pulp to be colored and a fixing agent being a cationic fixing agent in an amount of 0.01 to 3% by weight. , based on the dry paper pulp to be used.
• the coloring of paper is usually carried out with dyes (see e.g. Ullmanns Encyklopadie der Technische Chemie, 4th edition, volume 17, pages 613 and 614).
• the paper colored in this way usually has insufficient fastness properties, in particular light fastness that is too low.
• the object of the present application was to provide a new process for coloring paper in bulk, in which pigments are also used as colorants and the known disadvantages should no longer occur.
• Organic pigments which serve as colorants in the process according to the invention are, for example, those from the class of the monoazo pigments (for example products which are derived from acetoessigarylide derivatives or from ⁇ -naphthol derivatives), lacquered monoazo dyes (for example lacquered ⁇ -oxynaphthoic acid dyes), disazo pigments, condensed disazo pigments Isoindoline derivatives, derivatives of naphthalene or perylene tetracarboxylic acid, anthraquinone pigments, thioindigo derivatives, azomethine derivatives, quinacridones, dioxazines, pyrazoloquinazolones, phthalocyanine pigments or lacquered basic dyes (eg lacquered triarylmethane dyes).
• monoazo pigments for example products which are derived from acetoessigarylide derivatives or from ⁇ -naphthol derivative
• Examples include the inorganic pigments Pigment Yellow 42 (CI 77 492), Pigment White 6 (CI 77 891), Pigment Blue 27 (CI 77 510), Pigment Blue 29 (CI 77 007), or Pigment Black 7 (CI 77 266) and the organic pigments Pigment Yellow 1 (CI 11 680), Pigment Yellow 3 (CI 11 710), Pigment Yellow 42 (CI 77 492), Pigment Yellow 74 (CI 11 741), Pigment Yellow 83 (CI 21 108), pigment Yellow 106, Pigment Yellow 108 (CI 68 240), Pigment Yellow 117, Pigment Yellow 126, Pigment Yellow 139, Pigment Yellow 185, Pigment Orange 5 (CI 12 075), Pigment Orange 67, Pigment Red 3 (CI 12 120), Pigment Red 48: 1 (CI 15 865: 1), Pigment Red 48: 4 (15 865: 4), Pigment Red 101 (CI 77 491), Pigment Red 112 (CI 12 370), Pigment Red 123 (CI 71 145 ), Pigment Red 169
• Cationic fixatives of the above class (A) are known homopolymers of diallyldimethylammonium chloride and copolymers of diallyldimethylammonium chloride with acrylamide and / or methacrylamide.
• the copolymerization can be carried out in any monomer ratio.
• the K value of the homopolymers and copolymers of diallyldimethylammonium chloride is at least 30, preferably 95 to 180.
• Cationic fixatives of class (B) are described for example in EP-A-146,000.
• Cationic fixatives of class (C) are described for example in DE-A-3 613 651.
• Cationic fixatives of class (D) are described for example in EP-A-216 387.
• Cationic fixatives of the above class (E) are known copolymers of acrylamide and 90 to 10 wt .-%, preferably 70 to 30 wt .-% (C1-C4-dialkylamino) -C1-C4-alkyl acrylates and / or methacrylates .
• the cationic fixatives are used in an amount of 0.01 to 3% by weight, preferably 0.03 to 1% by weight and in particular 0.05 to 0.5% by weight, in each case based on the dry color to be colored Pulp, applied.
• the pigments are generally used in an amount of 0.01 to 5% by weight, preferably 0.05 to 2% by weight and in particular 0.1 to 2% by weight, in each case based on the dry paper pulp to be colored, applied.
• pigment and fixative it is preferred to add a previously prepared pigment / fixative mixture.
• a preparation can also contain other auxiliaries, e.g. Fungicides, water retention agents or surfactants, for example nonionic surfactants, such as addition products of alkylene oxides with fatty acids, alcohols, phenols, acid amides, mercaptans, amines or alkylphenols (cf. K. Lindner, Tenside-Textile Aid Detergent Raw Materials, Volume 1, pages 837 to 917, 1964).
• auxiliaries e.g. Fungicides, water retention agents or surfactants, for example nonionic surfactants, such as addition products of alkylene oxides with fatty acids, alcohols, phenols, acid amides, mercaptans, amines or alkylphenols (cf. K. Lindner, Tenside-Textile Aid Detergent Raw Materials, Volume 1, pages 837 to 917, 1964).
• the cationic fixatives are generally processed as an aqueous solution.
• the pigments used as colorants in the new process are expediently in the form of pigment preparations known per se, e.g. used as aqueous dispersions. Those aqueous pigment preparations which contain nonionic surfactants as dispersing agents are preferred. The above-mentioned components may be mentioned as nonionic surfactants, for example.
• Paper masses to be colored can e.g. unbleached or bleached cellulose, wood pulp or waste paper, optionally in each case together with fillers, such as kaolin, chalk or talc, or other auxiliaries, such as aluminum sulfate or resin glue.
• the pH of the stock suspension can be between 4 and 9. It is preferred to use papers that are manufactured in the neutral pH range, e.g. Tissue or graphic papers.
• homogeneous dyeings are obtained which have only a low two-sidedness. They also have high lightfastness and fastness to bleeding.
• Another advantage is that when using organic pigments from the class of monoazo pigments based on ⁇ -naphthol, for example Pigment Orange 5 (CI 12 075), the isoindoline derivatives, for example Pigment Yellow 139 or Pigment Yellow 185, or the lacquered basic dyes , e.g. Pigment Red 48: 1 (CI 15 865: 1, Pigment Red 48: 4 (CI 15 865: 4), Pigment Blue 1 (CI 42 595: 2) or Pigment Violet 27 (CI 42 535: 3)
• the usual bleaching agents known in the paper industry for example sodium hypochlorite or sodium dithionite, are used as bleaching agents.
• fixative The low consumption of fixative is also to be emphasized.
• An increase in the amount of fixative beyond the size according to the invention results in a marked deterioration in the coloration. Surprisingly, this is in contrast to paper coloring with dyes, where the quality of the coloring depends directly on the amount of fixing agent.
• a paper made from 80% by weight of bleached spruce sulfite pulp and 20% by weight of bleached beech sulfite pulp with a basis weight of 80 g / m 2 was produced on a test paper machine with a working width of 75 cm at a speed of 60 m / min.
• the pH of the stock suspension was 7.5, the mixed grinding degree 35 ° SR. Papers were produced from this stock suspension under the conditions specified below.
• the percentages given below are each% by weight.
• the percentages relating to pigment and fixative relate to the dry paper pulp.

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• Chemical Kinetics & Catalysis (AREA)
• Paper (AREA)

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• 1987
  • 1987-09-30 DE DE19873732981 patent/DE3732981A1/de not_active Withdrawn
• 1988
  • 1988-09-22 DE DE3889049T patent/DE3889049D1/de not_active Expired - Lifetime
  • 1988-09-22 EP EP88115563A patent/EP0309908B1/de not_active Expired - Lifetime
  • 1988-09-26 CA CA000578381A patent/CA1302022C/en not_active Expired - Lifetime
  • 1988-09-27 FI FI884421A patent/FI95063C/sv not_active IP Right Cessation
  • 1988-09-27 JP JP63239875A patent/JPH01104898A/ja active Pending
  • 1988-09-29 DK DK544388A patent/DK544388A/da not_active Application Discontinuation
  • 1988-09-29 AU AU22957/88A patent/AU605633B2/en not_active Ceased
• 1991
  • 1991-06-06 US US07/711,378 patent/US5131981A/en not_active Expired - Lifetime

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