US 11,745,465 B2
Polyurethane-based insulation board
Giuseppe Vairo, Correggio (IT); Elena Ferrari, Correggio (IT); Luigi Bertucelli, Correggio (IT); and Alberto Fangareggi, Correggio (IT)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 16/767,263
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Nov. 7, 2018, PCT No. PCT/US2018/059525
§ 371(c)(1), (2) Date May 27, 2020,
PCT Pub. No. WO2019/108350, PCT Pub. Date Jun. 6, 2019.
Claims priority of application No. 102017000136482 (IT), filed on Nov. 28, 2017.
Prior Publication US 2020/0353716 A1, Nov. 12, 2020
Int. Cl. B32B 5/18 (2006.01); B32B 5/20 (2006.01); B32B 5/22 (2006.01); B32B 5/24 (2006.01); B32B 5/28 (2006.01); B32B 5/32 (2006.01); B32B 7/02 (2019.01); B32B 7/12 (2006.01); E04B 1/76 (2006.01); E04B 1/80 (2006.01); B29C 44/24 (2006.01); B29C 44/30 (2006.01); B29C 44/32 (2006.01); B32B 5/02 (2006.01); B32B 9/00 (2006.01); B32B 7/022 (2019.01); B32B 7/027 (2019.01); B32B 27/06 (2006.01); B32B 27/40 (2006.01); B32B 3/26 (2006.01); B32B 3/06 (2006.01); B32B 27/12 (2006.01); B29K 105/04 (2006.01); B29C 44/46 (2006.01); B29K 75/00 (2006.01); C08G 71/02 (2006.01)
CPC B32B 7/02 (2013.01) [B29C 44/24 (2013.01); B29C 44/30 (2013.01); B29C 44/321 (2016.11); B29C 44/326 (2013.01); B32B 3/26 (2013.01); B32B 5/022 (2013.01); B32B 5/18 (2013.01); B32B 5/20 (2013.01); B32B 5/22 (2013.01); B32B 5/245 (2013.01); B32B 5/32 (2013.01); B32B 7/022 (2019.01); B32B 7/027 (2019.01); B32B 7/12 (2013.01); B32B 9/002 (2013.01); B32B 27/065 (2013.01); B32B 27/40 (2013.01); E04B 1/762 (2013.01); E04B 1/7625 (2013.01); E04B 1/80 (2013.01); E04B 1/806 (2013.01); B29C 44/46 (2013.01); B29K 2075/00 (2013.01); B29K 2105/045 (2013.01); B29K 2105/046 (2013.01); B29K 2713/005 (2013.01); B29K 2713/02 (2013.01); B29K 2995/0015 (2013.01); B29K 2995/0017 (2013.01); B29K 2995/0063 (2013.01); B29K 2995/0096 (2013.01); B32B 3/06 (2013.01); B32B 5/028 (2013.01); B32B 27/12 (2013.01); B32B 2250/02 (2013.01); B32B 2250/03 (2013.01); B32B 2250/04 (2013.01); B32B 2250/05 (2013.01); B32B 2250/40 (2013.01); B32B 2255/10 (2013.01); B32B 2260/021 (2013.01); B32B 2260/023 (2013.01); B32B 2260/04 (2013.01); B32B 2262/101 (2013.01); B32B 2266/0278 (2013.01); B32B 2266/06 (2013.01); B32B 2266/08 (2013.01); B32B 2305/022 (2013.01); B32B 2305/38 (2013.01); B32B 2307/302 (2013.01); B32B 2307/304 (2013.01); B32B 2307/536 (2013.01); B32B 2307/72 (2013.01); B32B 2375/00 (2013.01); B32B 2419/00 (2013.01); C08G 71/02 (2013.01); C08G 2110/005 (2021.01); C08G 2110/0016 (2021.01); C08G 2110/0025 (2021.01); C08G 2110/0058 (2021.01); C08G 2110/0083 (2021.01); C08G 2330/00 (2013.01); E04B 2103/04 (2013.01); Y10T 428/2495 (2015.01); Y10T 428/24942 (2015.01); Y10T 428/24967 (2015.01); Y10T 428/24992 (2015.01); Y10T 428/249976 (2015.04); Y10T 428/249977 (2015.04); Y10T 428/249986 (2015.04); Y10T 442/649 (2015.04); Y10T 442/651 (2015.04); Y10T 442/652 (2015.04)] 20 Claims
OG exemplary drawing
 
1. An external thermal insulation composite system, comprising:
a concrete or masonry external wall; and
a multilayer thermal insulation board disposed on an external surface of the concrete or masonry external wall, the multilayer thermal insulation board, comprising:
at least one rigid or semi-rigid closed cell polyurethane foam layer having an open cell volume of less than 20% by volume according to ASTM D 6226, the at least one closed cell polyurethane foam layer having opposing major surfaces defining a thickness therebetween,
at least one rigid or semi-rigid open cell polyurethane foam layer having an open cell volume of greater than 80% by volume according to ASTM D 6226, the at least one open cell polyurethane foam layer being disposed on one or both major surfaces of the at least one closed cell polyurethane layer and having a thickness or a combined thickness, respectively, less than the thickness of the closed cell polyurethane foam layer,
wherein the multilayer thermal insulation board having a total layer thickness exhibits improved dimensional stability in comparison to a closed cell polyurethane foam board having an identical thickness, length, and width, wherein improved dimensional stability is measured as a dimensional change percentage in the width direction after a 4-day thermal cycle closer to zero than that of the closed cell polyurethane foam board.