EP3173493A1 - Cuir doté de propriétés autonettoyantes et résistantes à la chaleur/au feu et procédé d'obtention de celui-ci - Google Patents

Cuir doté de propriétés autonettoyantes et résistantes à la chaleur/au feu et procédé d'obtention de celui-ci Download PDF

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Publication number
EP3173493A1
EP3173493A1 EP16464008.8A EP16464008A EP3173493A1 EP 3173493 A1 EP3173493 A1 EP 3173493A1 EP 16464008 A EP16464008 A EP 16464008A EP 3173493 A1 EP3173493 A1 EP 3173493A1
Authority
EP
European Patent Office
Prior art keywords
leather
titanium dioxide
self
resistance
cleaning properties
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Withdrawn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
EP16464008.8A
Other languages
German (de)
English (en)
Inventor
Carmen Cornelia GAIDÃU
Madalina Camelia IGNAT
Roxana Mioara PITICESCU
Radu Robert PITICESCU
Laura Madalina POPESCU
Marcel IONESCU
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.)
Institutul National De Cercetare-Dezvoltare Pentru Textile Si Pielarie (incdtp) Sucursala Institul De Cercetare Pielarie Incaltaminte (icpi)
Original Assignee
Institutul National De Cercetare-Dezvoltare Pentru Textile Si Pielarie (incdtp) Sucursala Institul De Cercetare Pielarie Incaltaminte (icpi)
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 Institutul National De Cercetare-Dezvoltare Pentru Textile Si Pielarie (incdtp) Sucursala Institul De Cercetare Pielarie Incaltaminte (icpi) filed Critical Institutul National De Cercetare-Dezvoltare Pentru Textile Si Pielarie (incdtp) Sucursala Institul De Cercetare Pielarie Incaltaminte (icpi)
Publication of EP3173493A1 publication Critical patent/EP3173493A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C11/00—Surface finishing of leather
    • C14C11/003—Surface finishing of leather using macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C13/00—Manufacture of special kinds or leather, e.g. vellum
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes

Definitions

  • the invention relates to leather with surface properties such as self-cleaning and resistance to heat/fire, properties highly required for leather upholstery and protective footwear, and method of obtaining thereof.
  • Patent US 20130078451 A1 shows a process for manufacturing leather used to cover surfaces, similar to a rug, with antimicrobial properties and resistance to water and wear, improved by coating the surface with silver and silica nano particles.
  • the disadvantage of the method consists in the application of the process restricted to this leather assortment only, suggesting a stiffening of the surface and limited scope.
  • Patent literature does not report the application of nanomaterials with photocatalytic functions to break down dirt that reaches the leather surface. Most patents combine silicone and fluorosilicone materials with nano materials to increase surface tension and reject dirt particles that would adhere, self-cleaning taking place through the formation of spherical water droplets, with capacity to roll on the inclined leather surface and drag soluble dirt.
  • Patent CN 101412869 B shows nano pigments based on nano titanium dioxide, nano zinc oxide or nano silica and method of using them for surface finishing of natural leather, thus producing leather with antibacterial properties, resistance to fire and UV radiation.
  • the process presented in the patent has the disadvantage that the leather surface does not have any self-cleaning properties when in contact with dirt.
  • the technical problem solved by the invention relates to natural leather with photocatalytic self-cleaning properties of the surface, under the influence of UV and visible light, with resistance to heat transfer and improved combustion behavior and the process for obtaining thereof.
  • leather with self-cleaning properties and resistance to heat/fire is made by coating the surface of leather by classic spraying method using film-forming composites containing titanium dioxide nano particles doped with 10% silica in concentration from 0.01 to 6 g/100cm 2 .
  • Titanium dioxide nano particles doped with 10% silica are obtained by hydrothermal method, at a pressure of 40 atmospheres and a temperature of 200°C and have an average particle size of 46 nm, determined by transmission electron microscopy.
  • As control samples leather surfaces treated with undoped titanium dioxide nano particles and finished leather surfaces without nano particles were exposed under identical conditions. The results are shown in Table 1 and show that under visible light, self-cleaning is faster than under ultraviolet light, which is an important advantage compared to the treatments with undoped titanium dioxide nano particles with photocatalytic activity only in ultraviolet light.
  • Heat resistance was determined in accordance with EN 702:2003 and indicated a contact heat transmission threshold upon exposure to a temperature of 250°C for 24.11 seconds for the leather treated with titanium dioxide nano particles, doped with 10% silica, compared to 21.41 seconds recorded for untreated leather.
  • Combustion behavior was evaluated according to the methods described in EN ISO 15025:2006 and indicated an afterglowy time of 10 seconds for treated leather compared to 250 seconds for untreated skin by exposure to combustion for 10 seconds.
  • the method of manufacturing bovine leather with self-cleaning properties and resistance to heat/fire consists in integrating titanium dioxide nano particles doped with 10% titanium dioxide in the base finishing composite, containing acrylic binders, pigment paste and water, by dispersing them using polyethylene glycol 600, with or without sodium polyacrylate by mechanical stirring and ultrasonication.
  • the coating is classically applied, manually, by spraying, or in the automatic finishing booth, in successive layers, with intermediate drying, by pressing the base coat and final coating before fixing the base coat with nitrocellulose lacquer coats, which finally polymerize by pressing.
  • Embodiments 1 and 2 show the reference procedures for finishing leather without nano particles and finishing with undoped titanium dioxide nano particles, and Embodiments 3 and 4 show finishing processes using titanium dioxide nano particles doped with 10% silica.
  • Basecoat finishing consists in applying an aqueous emulsion of acrylic polymer with a concentration of 250 g/L, which is mixed with 110 g/L pigment paste based on macro titanium dioxide, water up to 1L, and is applied in 4 coats by spraying and intermediate drying, followed by pressing at 110°C and 20 kgf. Next 2 additional base coats are applied with intermediate and final free drying. Two final fixing coats are applied by spraying a nitrocellulose lacquer in a concentration of 850 g/L with intermediate drying between coats and final pressing at 110°C and 20 kgf.
  • the base coat containing doped titanium dioxide nanoparticles with an average particle size of 25 nm is prepared by mixing an amount of 0.05-10% (% relative to the amount of binder) with an amount equal to the mass of polyethylene glycol 600 nano particles, 110 g/L pigment paste based on macro titanium dioxide, water up to 1L and 250 g/L acrylic binder, followed by mechanical stirring for 30 minutes and 5 minutes stirring by ultrasonication at 50/60 Hz. Further, the application of the finish is the same as that described in Embodiment 1.
  • the base coat containing titanium dioxide nanoparticles doped with 10% silica, with an average particle size of 46 nm is prepared by mixing an amount of 0.05-10% (% relative to the amount of binder) with an amount equal to the mass of polyethylene glycol 600 nano particles, 110 g/L pigment paste based on macro titanium dioxide, water up to 1L and 250 g/L acrylic binder, followed by mechanical stirring for 30 minutes and 5 minutes stirring by ultrasonication at 50/60 Hz. Further, the application of the finish is the same as that described in Embodiment 1.
  • the base coat containing titanium dioxide nanoparticles doped with 10% silica, with an average particle size of 46 nm is prepared by mixing an amount of 0.05-10% (% relative to the amount of binder) with an amount equal to the mass of polyethylene glycol 600 nano particles and to 0.01-15% sodium polyacrylate (% relative to the amount of nano particles) 110 g/L pigment paste based on macro titanium dioxide, water up to 1L and 250 g/L acrylic binder, followed by mechanical stirring for 30 minutes and 5 minutes stirring by ultrasonication at 50/60 Hz. Further, the application of the finish is the same as that described in Embodiment 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Laminated Bodies (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
EP16464008.8A 2015-11-18 2016-09-06 Cuir doté de propriétés autonettoyantes et résistantes à la chaleur/au feu et procédé d'obtention de celui-ci Withdrawn EP3173493A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ROA201500860A RO131878B1 (ro) 2015-11-18 2015-11-18 Piei cu proprietăţi de autocurăţare şi rezistenţă la căldură/foc, şi procedeu de obţinere a acestora

Publications (1)

Publication Number Publication Date
EP3173493A1 true EP3173493A1 (fr) 2017-05-31

Family

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Family Applications (1)

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EP16464008.8A Withdrawn EP3173493A1 (fr) 2015-11-18 2016-09-06 Cuir doté de propriétés autonettoyantes et résistantes à la chaleur/au feu et procédé d'obtention de celui-ci

Country Status (2)

Country Link
EP (1) EP3173493A1 (fr)
RO (1) RO131878B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3489370A1 (fr) * 2017-11-22 2019-05-29 Institutul National de Cercetare-Dezvoltare Pentru Textile si Pielarie (INCDTP) Sucursala Institul de Cercetare Pielarie Incaltaminte (ICPI) Cuir présentant une activité antimicrobienne et des propriétés autonettoyantes et son procédé de fabrication
CN112280451A (zh) * 2020-10-29 2021-01-29 上海阳森精细化工有限公司 一种仿生分形生物基耐污易清洁地坪材料制备方法
IT201900017942A1 (it) * 2019-10-04 2021-04-04 Leather Plus S R L Metodo di trattamento funzionalizzante per pelli e simili.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109796869A (zh) * 2018-12-08 2019-05-24 英鸿纳米科技股份有限公司 一种防雾、自洁纳米材料的制备方法
CN111171618A (zh) * 2019-12-28 2020-05-19 韶关市连邦环保新材料股份有限公司 一种纳米水性防火涂料

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1216479A (en) * 1966-12-14 1970-12-23 Nippon Paint Co Ltd Coating compositions
WO1996004123A1 (fr) 1994-07-29 1996-02-15 Wilhelm Barthlott Surfaces autonettoyantes d'objets et leur procede de production
EP1789595A1 (fr) 2004-08-10 2007-05-30 TFL Ledertechnik GmbH Cuir imperméabilisé et autonettoyant
CN101412869A (zh) * 2008-11-27 2009-04-22 四川大学 皮革纳米颜料膏及其制备方法
US20130078451A1 (en) 2011-09-22 2013-03-28 Ruofei Zhang Nano-particle coated genuine leather floor
CN104610832A (zh) * 2015-01-22 2015-05-13 王禹 一种纳米TiO2改性聚丙烯酸酯涂饰剂

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1216479A (en) * 1966-12-14 1970-12-23 Nippon Paint Co Ltd Coating compositions
WO1996004123A1 (fr) 1994-07-29 1996-02-15 Wilhelm Barthlott Surfaces autonettoyantes d'objets et leur procede de production
EP1789595A1 (fr) 2004-08-10 2007-05-30 TFL Ledertechnik GmbH Cuir imperméabilisé et autonettoyant
CN101412869A (zh) * 2008-11-27 2009-04-22 四川大学 皮革纳米颜料膏及其制备方法
CN101412869B (zh) 2008-11-27 2010-08-11 四川大学 皮革纳米颜料膏及其制备方法
US20130078451A1 (en) 2011-09-22 2013-03-28 Ruofei Zhang Nano-particle coated genuine leather floor
CN104610832A (zh) * 2015-01-22 2015-05-13 王禹 一种纳米TiO2改性聚丙烯酸酯涂饰剂

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 200946, Derwent World Patents Index; AN 2009-H89744, XP002764758 *
DATABASE WPI Week 201556, Derwent World Patents Index; AN 2015-420494, XP002764757 *
PETICA A. ET AL.: "Doped TiO2 nanophotocatalysts for leather surface finishing", JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, vol. 12, no. 6, 20 August 2015 (2015-08-20), Springer.com, pages 1153 - 1163, XP002764756, DOI: 10.1007/s11998-015-9711-2 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3489370A1 (fr) * 2017-11-22 2019-05-29 Institutul National de Cercetare-Dezvoltare Pentru Textile si Pielarie (INCDTP) Sucursala Institul de Cercetare Pielarie Incaltaminte (ICPI) Cuir présentant une activité antimicrobienne et des propriétés autonettoyantes et son procédé de fabrication
IT201900017942A1 (it) * 2019-10-04 2021-04-04 Leather Plus S R L Metodo di trattamento funzionalizzante per pelli e simili.
WO2021064669A1 (fr) * 2019-10-04 2021-04-08 Leather Plus S.R.L. Procédé de traitement de fonctionnalisation pour peaux
CN114514331A (zh) * 2019-10-04 2022-05-17 皮革加责任有限公司 用于生皮的功能化处理方法
CN112280451A (zh) * 2020-10-29 2021-01-29 上海阳森精细化工有限公司 一种仿生分形生物基耐污易清洁地坪材料制备方法

Also Published As

Publication number Publication date
RO131878A2 (ro) 2017-05-30
RO131878B1 (ro) 2020-07-30

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