	US 12,281,246 B2
	Two-component polyurethane foam adhesive, a process for preparing the same and an article made therefrom
Thomas Chase, Wyandotte, MI (US); Todd W. Wishneski, Missouri City, TX (US); Matthew Freeman, Spring, TX (US); Marcus J. Hunter, Houston, TX (US); and Joshua James Belill, Wyandotte, MI (US)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/754,817
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Oct. 6, 2020, PCT No. PCT/EP2020/077896 § 371(c)(1), (2) Date Apr. 13, 2022, PCT Pub. No. WO2021/073926, PCT Pub. Date Apr. 22, 2021.
Claims priority of provisional application 62/915,731, filed on Oct. 16, 2019.
Claims priority of application No. 19208459 (EP), filed on Nov. 12, 2019.
Prior Publication US 2023/0399555 A1, Dec. 14, 2023
Int. Cl. C09J 175/08 (2006.01); C09J 5/08 (2006.01)

CPC C09J 175/08 (2013.01) [C09J 5/08 (2013.01); C09J 2301/20 (2020.08); C09J 2301/312 (2020.08); C09J 2301/50 (2020.08)]

17 Claims

1. A two-component polyurethane foam adhesive, comprising:

(A) an isocyanate prepolymer component, obtained by mixing

(A1) at least one first polyether polyol having an average functionality in between 1.9 to 3.5 and a hydroxyl number in between 10 mg KOH/g to 100 mg KOH/g,

and

(A2) at least one polymeric isocyanate,

wherein the isocyanate prepolymer has an isocyanate content in between 15 wt.-% to 28 wt.-%, and

(B) an isocyanate reactive component comprising

(B1) 50 wt.-% to 90 wt.-% based on a total weight of the isocyanate reactive component of a second polyether polyol having an average functionality in between 1.9 to 3.5 and a hydroxyl number in between 10 mg KOH/g to 40 mg KOH/g, and

(B2) 0.5 wt.-% to 30 wt.-% based on the total weight of the isocyanate reactive component of one of a third polyether polyol having an average functionality in between 1.9 to 8.0 and a hydroxyl number in between 40 mg KOH/g to 1000 mg KOH/g.