WO2023195877A1 - Composition pour le traitement de surface de papier - Google Patents

Composition pour le traitement de surface de papier Download PDF

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Publication number
WO2023195877A1
WO2023195877A1 PCT/RU2022/050411 RU2022050411W WO2023195877A1 WO 2023195877 A1 WO2023195877 A1 WO 2023195877A1 RU 2022050411 W RU2022050411 W RU 2022050411W WO 2023195877 A1 WO2023195877 A1 WO 2023195877A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper
composition
surface treatment
biocidal properties
properties
Prior art date
Application number
PCT/RU2022/050411
Other languages
English (en)
Russian (ru)
Inventor
Андрей Борисович КУРЯТНИКОВ
Игорь Васильевич ПАВЛОВ
Александр Николаевич ХОМУТИННИКОВ
Елена Михайловна ФЕДОРОВА
Николай Васильевич ХОМУТИННИКОВ
Игорь Олегович ГОВЯЗИН
Ольга Сергеевна УРАЕВА
Original Assignee
Акционерное общество "Гознак" (АО "Гознак")
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
Priority claimed from RU2022109452A external-priority patent/RU2784649C1/ru
Application filed by Акционерное общество "Гознак" (АО "Гознак") filed Critical Акционерное общество "Гознак" (АО "Гознак")
Publication of WO2023195877A1 publication Critical patent/WO2023195877A1/fr

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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
    • D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
    • 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
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents

Definitions

  • the invention relates to paper production, in particular, to the production of security paper with biocidal properties, for example, paper for making banknotes.
  • banknotes change hands many times during their existence. At the same time, they accumulate contaminants and various pathogenic microorganisms (germs, bacteria, fungi, viruses), which are transmitted through contact from person to person and contribute to the spread of dangerous infectious diseases such as streptoderma, candidiasis, hepatitis, coronavirus infection, etc.
  • banknote paper introducing compounds with biocidal properties into banknote paper, as well as giving the paper low adsorption properties.
  • the latter is achieved, among other things, through surface treatment of paper polyurethane dispersion with the addition of a crosslinking agent. After this treatment, the paper becomes more resistant to contamination, and its absorbency to aqueous solutions, oils, and fats is also reduced.
  • a composition with biocidal properties is known (patent RU 2436305 dated December 20, 2011), which contains an organic compound selected, among other things, from the group of isothiazolinones, as well as an inorganic compound selected from the group of metal oxides.
  • a composition with biocidal properties is known (application US 2008227766 dated September 18, 2008), consisting of a combination of two components, one of which is selected from the group of benzothiazolinones, and the other from the group containing organic and inorganic silver compounds, including silver nanoparticles.
  • a composition with biocidal properties is known (patent RU 2436561 dated December 20, 2011), which contains as one of the components a compound based on isothiazolinone, which, in particular, can be used as 2-methyl-4-isothiazolin-3-one.
  • This composition allows one to achieve good biocidal properties with low consumption of components.
  • Patent US 8592045 dated November 26, 2013 describes banknotes with antimicrobial properties, material and production method.
  • the banknotes are coated with two different antimicrobial substances contained in composition of the polymer coating.
  • an antimicrobial substance based on isothiazolinone is described. According to the authors, this technical solution is the closest to the claimed one.
  • the problem solved by the invention is to impart biocidal properties to paper treated from the surface with a composition based on polyurethane dispersion while maintaining good physical and mechanical characteristics.
  • composition for surface treatment of paper containing an isothiazolinone derivative has the following composition (wt.%): polyurethane dispersion (in terms of dry matter) 12-18
  • biocidal properties in the invention means the ability to suppress the development of pathogenic microorganisms, such as microbes, bacteria, fungi, and viruses.
  • this term means that paper treated with this chemical composition has fungicidal, antimicrobial and antiviral properties.
  • the 2-methyl-4-isothiazolin-3-one used in the invention belongs to the group of isothiazolinones and is widely used as a preservative in cosmetics and paint and varnish production.
  • this biocidal additive When preparing a composition for surface treatment of paper (hereinafter referred to as the composition), this biocidal additive must be used in the form of an aqueous solution with a concentration of 10-30%, or, more preferably, with a concentration of 10-20%.
  • the invention uses aqueous dispersions of anionic type ionomer polyurethane, in which part of the polyol component is replaced by a polyfunctional monomer with carboxyl groups neutralized with ammonia or a tertiary amine.
  • PUD polyurethane dispersions
  • the concentration of PUD used in the manufacture of the composition should be in the range of 28-40%, or, more preferably, in the range of 28-32%.
  • a crosslinking agent based on polyaziridine (hereinafter referred to as the crosslinking agent) is added to the composition in order to increase the wet strength and reduce the adsorption properties of the paper in relation to liquids.
  • the amount of crosslinking agent in the composition should be in the range of 0.5-1.4%.
  • the addition of less than 0.5% crosslinking agent does not allow achieving the required paper characteristics.
  • adding more than 1.4% crosslinking agent does not improve paper performance and is not economically feasible.
  • a product with the trade name CX-100, manufactured by DSM NeoResins is used as a cross-linking agent in the invention. If the properties match, products from other manufacturers can be used for this purpose.
  • the introduction of glycerin into the composition helps to improve the migration of the biocide additive from a paper sheet treated with a polyurethane dispersion with a cross-linking agent.
  • the presence of glycerol probably facilitates the transfer of the biocide additive from the surface of the paper into the liquid contaminant containing pathogenic microorganisms.
  • the composition is prepared as follows. PUD with a concentration of 28-40% is pre-diluted with water to the required concentration and stirred for 5-30 minutes.
  • a biocide additive in the form of an aqueous solution with a concentration of 10-30%, glycerin and a cross-linking agent based on polyaziridine.
  • the entire process of preparing the composition is carried out at a temperature of 18-25 °C.
  • the finished composition with a pH of 7.0 - 9.5 is used for processing paper within 8-12 hours from the moment of preparation. If necessary, colloidal silver particles with a size of 10-50 nm stabilized in an aqueous environment are also added to the composition in order to improve the biocidal properties.
  • the paper is produced using well-known technology for the production of banknote paper.
  • the fibrous raw material is ground and paper pulp is prepared.
  • the following are added to the prepared paper pulp: fillers (titanium dioxide, chalk, kaolin, etc.), additives to increase the strength of paper in dry and wet states (sodium carboxymethylcellulose, polyamide (amine) epichlorohydrin resin, etc.), substances for internal and mass sizing of paper (alkyl ketene dimers, alkenyl succinic acids, etc.), dyes (direct, acid, etc.), etc.
  • additives necessary for protection against counterfeiting are introduced into the paper pulp, such as dyed fibers, fibers with fluorescent and magnetic properties, etc.
  • a paper web is formed on a round mesh or flat mesh papermaking machine (PM), which may contain watermarks, security threads built into the paper structure, etc.
  • PM round mesh or flat mesh papermaking machine
  • the formed and pre-dried paper web is processed with a composition in accordance with the invention on the PM (on-line ), using a size press, film press, impregnation bath, etc.
  • the finished paper web is treated with a composition in accordance with the invention separately standing equipment (off-line).
  • the temperature of the composition during processing of the paper web should not exceed 35 °C.
  • a test method is used, which is based on determining changes in the intensity of bioluminescence of genetically engineered bacteria under the influence of biocidal additives contained in paper samples. Paper without biocidal additives is used as a negative control.
  • a “Biotoke-10” luminometer with a set of cuvettes for measuring bioluminescence, as well as a biological indicator “Ecolum”, which is a non-pathogenic bioluminescent bacteria, is used.
  • Ecolum biological indicator
  • Bioluminescence measurement is then carried out. The greater the decrease in bioluminescence intensity (quenching), the better the biocidal properties of the paper.
  • the fibrous raw material is ground and paper pulp is prepared.
  • the composition of the paper pulp is 100% cotton fiber.
  • the necessary additives are introduced into this paper pulp at different stages of preparation in accordance with the technology for manufacturing banknote paper.
  • a paper web is formed on a paper machine, which, after preliminary drying, is treated in an impregnation bath with compositions containing a biocide additive (examples 2-12).
  • a biocide additive for a negative control
  • paper is made using a composition without a biocide additive (example 1).
  • the paper treated with these compositions is finally dried, calendered and rolled.
  • Formulations of compositions for processing paper are shown in Table 1.
  • the addition of glycerin to the composition helps improve the biocidal properties of paper.
  • a comparison of a composition without glycerin (example 2) with compositions containing glycerin (examples 5-7), with the same dosage of the biocide additive shows an increase in the quenching of bioluminescence due to the addition of glycerin. That is, at the same dosage, the effectiveness of the biocide additive in the presence of glycerol increases.
  • compositions in accordance with the invention which reduce the consumption of biocidal additives, compared to compositions that do not contain glycerin (examples 2-4), while maintaining the good biocidal properties of paper.
  • testing of paper made using compositions in accordance with the invention demonstrates the presence of good physical and mechanical characteristics.
  • compositions in accordance with the invention makes it possible to produce paper with good biocidal properties while maintaining its physical and mechanical characteristics. This is achieved through a certain combination of components, as well as through the use of glycerin in the composition, which makes it possible to reduce the dosage of the biocide additive while maintaining its effectiveness.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Paper (AREA)

Abstract

L'invention se rapporte à la production du papier, notamment à la production de papier sécurisé possédant des capacités biocides, comme des papiers pour la production de billets de banque. L'invention concerne une composition pour le traitement de surface de papier, comprenant de l'isothiazolinone et ayant la composition suivante (en % en poids): dispersion de polyuréthane (en termes de substance sèche) 12-18; 2-méthyl-4-isothiazoline-3-one 0,3-1,2; glycérine 0,9-2,1; agent de réticulation à base de polyazipyridine 0,5-1,4; le reste se composant d'eau. Le résultat technique est de conférer à un papier traité avec cette composition de surface à base d'une dispersion de polyuréthane, des propriétés biocides tout en conservant de bonnes caractéristiques physiques-mécaniques.
PCT/RU2022/050411 2022-04-08 2022-12-26 Composition pour le traitement de surface de papier WO2023195877A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2022109452A RU2784649C1 (ru) 2022-04-08 Композиция для поверхностной обработки бумаги и бумага, изготовленная с использованием этой композиции
RU2022109452 2022-04-08

Publications (1)

Publication Number Publication Date
WO2023195877A1 true WO2023195877A1 (fr) 2023-10-12

Family

ID=88243291

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2022/050411 WO2023195877A1 (fr) 2022-04-08 2022-12-26 Composition pour le traitement de surface de papier

Country Status (1)

Country Link
WO (1) WO2023195877A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2318942C1 (ru) * 2006-07-12 2008-03-10 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Состав для изготовления бумаги
EP2634309A1 (fr) * 2012-03-01 2013-09-04 Giesecke & Devrient GmbH Papier de sécurité
US8592045B2 (en) * 2007-02-09 2013-11-26 Microban Products Company Antimicrobial currency, material and method
RU2651249C1 (ru) * 2016-11-10 2018-04-18 Общество с ограниченной ответственностью "Бумага и Картон" (ООО "Бумага и Картон") Способ получения бумаги с антимикробными свойствами

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2318942C1 (ru) * 2006-07-12 2008-03-10 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Состав для изготовления бумаги
US8592045B2 (en) * 2007-02-09 2013-11-26 Microban Products Company Antimicrobial currency, material and method
EP2634309A1 (fr) * 2012-03-01 2013-09-04 Giesecke & Devrient GmbH Papier de sécurité
RU2651249C1 (ru) * 2016-11-10 2018-04-18 Общество с ограниченной ответственностью "Бумага и Картон" (ООО "Бумага и Картон") Способ получения бумаги с антимикробными свойствами

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