US 12,415,899 B2
Polyurethane foam
Jianfeng Wang, Haining (CN)
Assigned to LEVITEX FOAMS LIMITED, Altrincham (GB)
Filed by LEVITEX FOAMS LIMITED, Altrincham (GB)
Filed on Sep. 14, 2023, as Appl. No. 18/333,751.
Application 18/333,751 is a continuation of application No. 16/491,624, granted, now 11,713,382, previously published as PCT/CN2018/078261, filed on Mar. 7, 2018.
Claims priority of application No. 1703738 (GB), filed on Mar. 8, 2017.
Prior Publication US 2023/0416488 A1, Dec. 28, 2023
Int. Cl. C08J 9/14 (2006.01); C08G 18/20 (2006.01); C08G 18/24 (2006.01); C08G 18/48 (2006.01); C08G 18/76 (2006.01)
CPC C08J 9/145 (2013.01) [C08G 18/2081 (2013.01); C08G 18/244 (2013.01); C08G 18/48 (2013.01); C08G 18/7664 (2013.01); C08G 2110/0008 (2021.01); C08G 2110/005 (2021.01); C08G 2110/0058 (2021.01); C08G 2410/00 (2013.01); C08J 2201/026 (2013.01)] 19 Claims
 
1. A polyurethane foam having a sag value of 3.2-3.4, wherein the sag value is calculated according to the following expression:

OG Complex Work Unit Math
wherein the polyurethane foam has:
an IFD25% value of 20-24 N,
an IFD40% value of 33-37 N,
an IFD65% value of 70-74 N,
and wherein the IFD25%, IFD40%, and IFD65% values are determined according to the protocol set forth in ISO 2439:2008.