	US 11,851,521 B2
	Polyurethane foam and methods of forming the same
Jing Zhou, Shanghai (CN); Yue Dong, Shanghai (CN); and Song Yu, Shanghai (CN)
Assigned to SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION, Solon, OH (US)
Appl. No. 17/269,415
Filed by SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION, Solon, OH (US)
PCT Filed Aug. 21, 2019, PCT No. PCT/US2019/047383 § 371(c)(1), (2) Date Feb. 18, 2021, PCT Pub. No. WO2020/041397, PCT Pub. Date Feb. 27, 2020.
Claims priority of provisional application 62/727,618, filed on Sep. 6, 2018.
Claims priority of application No. 201810971318.2 (CN), filed on Aug. 23, 2018.
Prior Publication US 2021/0253777 A1, Aug. 19, 2021
Int. Cl. C08K 3/016 (2018.01); C08G 18/50 (2006.01); C08G 18/38 (2006.01); C08G 18/76 (2006.01); C08J 9/00 (2006.01); C08K 3/04 (2006.01)

CPC C08G 18/5075 (2013.01) [C08G 18/3853 (2013.01); C08G 18/5078 (2013.01); C08G 18/5081 (2013.01); C08G 18/7671 (2013.01); C08J 9/0066 (2013.01); C08K 3/016 (2018.01); C08K 3/04 (2013.01); C08G 2110/0066 (2021.01)]

13 Claims

1. A polyurethane foam comprising:

a base polyol component;

a phosphorous polyol component;

an isocyanate at a content of at least about 1 wt. % and not greater than about 9.0 wt. % for a total weight of the polyurethane foam, and

an expandable graphite at a content of at least about 8 wt. % and not greater than about 40 wt. % for a total weight of the polyurethane foam, wherein the phosphorous polyol component comprises at least one ethylene oxide (EO) terminal and an ethylene oxide content of not greater than about 30%, and

wherein the polyurethane foam comprises a V0 rating based on a UL94 flame retardancy test performed at a polyurethane foam thickness of 3.5 mm and a polyurethane foam density of 380 kg/m³.