Global Patent Index - EP 3173493 A1

EP 3173493 A1 20170531 - LEATHER WITH SELF-CLEANING PROPERTIES AND RESISTANCE TO HEAT/FIRE AND METHOD OF OBTAINING THEREOF

Title (en)

LEATHER WITH SELF-CLEANING PROPERTIES AND RESISTANCE TO HEAT/FIRE AND METHOD OF OBTAINING THEREOF

Title (de)

LEDER MIT SELBSTREINIGENDEN EIGENSCHAFTEN UND BESTÄNDIGKEIT GEGEN WÄRME/FEUER SOWIE VERFAHREN ZU SEINER HERSTELLUNG

Title (fr)

CUIR DOTÉ DE PROPRIÉTÉS AUTONETTOYANTES ET RÉSISTANTES À LA CHALEUR/AU FEU ET PROCÉDÉ D'OBTENTION DE CELUI-CI

Publication

EP 3173493 A1 20170531 (EN)

Application

EP 16464008 A 20160906

Priority

RO 201500860 A 20151118

Abstract (en)

The invention relates to leather for furniture and automotive upholstery and protective footwear, surface finished with titanium dioxide nano particles doped with 10% silica with an average particle size of 46 nm and with self-cleaning properties and improved resistance to heat transmission and combustion. The process for obtaining leather with self-cleaning properties and resistance to heat/fire consists in applying the base coat containing 0.05-10% titanium dioxide nano particles (% relative to the amount of binder) doped with 10% of silica which are dispersed in an equal amount of polyethylene glycol 600 and, according to another variant, 0.01-15% sodium polyacrylate, by mechanical stirring for 10 minutes, followed by sonication for 5 minutes, with pigment paste based on macro titanium dioxide, water and acrylic binder. This composition is applied by spraying in successive coats with intermediate drying and final pressing at 110°C and 20 kgf, followed by fixation with nitrocellulose lacquer in successive coats, with intermediate drying and final pressing in the same conditions. Self-cleaning properties are provided through photocatalytic degradation of organic dirt under the influence of ultraviolet and visible light and resistance to heat transfer and combustion.

IPC 8 full level

C14C 11/00 (2006.01); C14C 9/00 (2006.01); C14C 13/00 (2006.01)

CPC (source: EP)

C14C 9/00 (2013.01); C14C 11/003 (2013.01); C14C 13/00 (2013.01)

Citation (applicant)

Citation (search report)

  • [A] GB 1216479 A 19701223 - NIPPON PAINT CO LTD [JP]
  • [A] 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
  • [A] DATABASE WPI Week 201556, Derwent World Patents Index; AN 2015-420494, XP002764757
  • [AD] DATABASE WPI Week 200946, Derwent World Patents Index; AN 2009-H89744, XP002764758

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3173493 A1 20170531; RO 131878 A2 20170530; RO 131878 B1 20200730

DOCDB simple family (application)

EP 16464008 A 20160906; RO 201500860 A 20151118