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Global Patent Index - EP 4274736 A1

EP 4274736 A1 20231115 - METHOD FOR IMPROVING THE AIRTIGHTNESS OF BUILDINGS USING A BIOPOLYMER-BASED MEMBRANE

Title (en)

METHOD FOR IMPROVING THE AIRTIGHTNESS OF BUILDINGS USING A BIOPOLYMER-BASED MEMBRANE

Title (de)

VERFAHREN ZUR VERBESSERUNG DER LUFTDICHTHEIT VON GEBÄUDEN MITHILFE EINER MEMBRAN AUF BIOPOLYMERBASIS

Title (fr)

PROCÉDÉ D'AMÉLIORATION DE L'ÉTANCHÉITÉ À L'AIR DE BÂTIMENTS UTILISANT UNE MEMBRANE À BASE DE BIOPOLYMÈRES

Publication

EP 4274736 A1 20231115 (FR)

Application

EP 22702749 A 20220104

Priority

  • FR 2100107 A 20210107
  • FR 2100377 A 20210115
  • FR 2022050009 W 20220104

Abstract (en)

[origin: WO2022148925A1] The invention relates to a method for improving the airtightness of a building or a room in a building, comprising the use of a vapour barrier membrane on the inner face of the walls of the building or the room in the building, characterised in that the vapour barrier membrane is a humidity-regulating membrane comprising an active portion which comprises: - a middle layer having a thickness of 2 μm to 200 μm, preferably 4 μm to 100 μm, and consisting of a biopolymer having a water vapour permeability coefficient P1 which increases with average relative humidity and which, when it is determined at 23°C and at an average relative humidity of 25.5%, is at least equal to 300 Barrers, and, on either side of the middle layer and preferably in contact with the latter, - two outer layers having a thickness of 100 nm to 20 μpm, preferably 200 nm to 2.5 μm, and consisting, independently of each other, of an organic polymer having both a water vapour permeability coefficient P2, determined at 23°C and at an average relative humidity of 25.5%, of at most equal to 250 Barrers, preferably 0.05 to 100 Barrers, in particular 1.0 to 20 Barrers.

IPC 8 full level

B32B 5/02 (2006.01); B32B 7/02 (2019.01); B32B 7/04 (2019.01); B32B 9/02 (2006.01); B32B 19/04 (2006.01); B32B 23/08 (2006.01); B32B 27/08 (2006.01); B32B 27/12 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); B32B 27/42 (2006.01)

CPC (source: EP KR US)

B01D 69/1216 (2022.08 - US); B01D 71/10 (2013.01 - US); B01D 71/301 (2022.08 - US); B32B 5/022 (2013.01 - EP KR); B32B 5/028 (2013.01 - EP KR); B32B 7/02 (2013.01 - EP); B32B 7/022 (2018.12 - KR); B32B 7/04 (2013.01 - EP KR); B32B 9/02 (2013.01 - EP KR); B32B 19/045 (2013.01 - EP KR); B32B 23/08 (2013.01 - EP KR); B32B 27/08 (2013.01 - EP KR); B32B 27/12 (2013.01 - EP KR); B32B 27/304 (2013.01 - EP KR); B32B 27/32 (2013.01 - EP KR); B32B 27/36 (2013.01 - EP KR); B32B 27/42 (2013.01 - EP KR); B01D 2325/04 (2013.01 - US); B01D 2325/20 (2013.01 - US); B32B 2250/03 (2013.01 - EP KR); B32B 2250/40 (2013.01 - EP KR); B32B 2262/02 (2013.01 - EP KR); B32B 2262/04 (2013.01 - EP KR); B32B 2262/06 (2013.01 - EP KR); B32B 2262/10 (2013.01 - EP KR); B32B 2307/712 (2013.01 - EP KR); B32B 2307/724 (2013.01 - EP KR); B32B 2307/7246 (2013.01 - EP KR); B32B 2307/732 (2013.01 - EP KR); B32B 2419/04 (2013.01 - EP KR); B32B 2607/02 (2013.01 - EP KR)

Citation (search report)

See references of WO 2022148925A1

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

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

WO 2022148925 A1 20220714; CA 3202601 A1 20220714; EP 4274736 A1 20231115; JP 2024503640 A 20240126; KR 20230129990 A 20230911; US 2024058766 A1 20240222

DOCDB simple family (application)

FR 2022050009 W 20220104; CA 3202601 A 20220104; EP 22702749 A 20220104; JP 2023541278 A 20220104; KR 20237022603 A 20220104; US 202218260436 A 20220104