US 11,806,965 B2
Composite element having improved properties
Christof Grieser-Schmitz, Lemfoerde (DE); and Andre Kamm, Lemfoerde (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 16/963,934
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jan. 25, 2019, PCT No. PCT/EP2019/051871
§ 371(c)(1), (2) Date Jul. 22, 2020,
PCT Pub. No. WO2019/149634, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 8154345 (EP), filed on Jan. 31, 2018.
Prior Publication US 2021/0107255 A1, Apr. 15, 2021
Int. Cl. B32B 15/095 (2006.01); B32B 15/18 (2006.01); B32B 15/20 (2006.01); B32B 27/40 (2006.01); C08G 18/48 (2006.01); C08G 18/76 (2006.01)
CPC B32B 15/095 (2013.01) [B32B 15/18 (2013.01); B32B 15/20 (2013.01); B32B 27/40 (2013.01); C08G 18/4808 (2013.01); C08G 18/7671 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2307/536 (2013.01); B32B 2307/54 (2013.01); B32B 2375/00 (2013.01); B32B 2605/12 (2013.01); B32B 2605/18 (2013.01)] 19 Claims
 
1. A composite element having the following layer structure:
(i) 2 mm to 20 mm of metal,
(ii) 10 mm to 100 mm of compact polyurethane formulation, said polyurethane formulation being obtainable by reacting
(a) a compound having at least two isocyanate groups with
(b) polyether polyol, optionally in the presence of
(c) catalyst and/or
(d) auxiliaries and/or additives,
(e) chain extenders
(iii) 2 mm to 20 mm of metal,
wherein the compound (a) having at least two isocyanate groups has an NCO content of 20% to 50% and the polyether polyol (b) is a mixture comprising polyether polyol (b1) and polyether polyol (b2),
wherein the polyether polyol (b1) has a number-average molecular weight between 3.0×103 g/mol and 7.0×103 g/mol and an average functionality of 2.2 to 2.7, the polyether polyol (b2) has a number-average molecular weight between 0.15×103 g/mol and 2.0×103 g/mol and an average functionality of 2.5 to 3.5, and wherein the polyether polyol (b1) is present in the mixture at 50% by weight to 95% by weight and the polyether polyol (b2) is present in the mixture at 5% by weight to 50% by weight.