	US 12,460,042 B2
	Caprolactam-modified liquid mdi and its use in polyurethanes
Stefan Bokern, Lemfoerde (DE); Dong Liang, Shanghai (CN); Martin Hufnagel, Lemfoerde (DE); and Xiao Yu Sun, Shanghai (CN)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 18/019,255
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Aug. 6, 2021, PCT No. PCT/EP2021/072002 § 371(c)(1), (2) Date Feb. 2, 2023, PCT Pub. No. WO2022/029289, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. PCT/CN2020/107766 (WO), filed on Aug. 7, 2020.
Prior Publication US 2023/0287166 A1, Sep. 14, 2023
Int. Cl. C08G 18/28 (2006.01); C08G 101/00 (2006.01)

CPC C08G 18/2855 (2013.01) [C08G 2101/00 (2013.01)]

21 Claims

1. A liquid, storage stable isocyanate composition (Q) comprising monomeric diphenyl methane diisocyanate (MDI) as component (q1) and an amide with a molecular weight of less than 200 g/mol as component (q2) in an amount of 0.1 to 5 wt.-% based on the sum of the weight of components (q1) and (q2) which adds up to 100 wt.-%, wherein an NCO content is in the range of from 29.5 to 40.0 wt.-% based on the total weight of the respective isocyanate composition (Q), wherein the amide with a molecular weight of less than 200 g/mol is selected from the group consisting of beta-Caprolactam, gamma-Caprolactam, delta-Caprolactam, epsilon-Caprolactam and Laurolactam.