Patent ID: 11926701
Assignee: COVESTRO DEUTSCHLAND AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. The NCO prepolymer as claimed in claim 9, having an NCO content of 3 to 15 wt %, obtained by reacting a polycarbonate polyol as claimed in claim 1 with at least one polyisocyanate from the group consisting of 1,5-naphthalene diisocyanate, 2,4′-diphenylmethane diisocyanate (2,4′-MDI), 4,4′-diphenylmethane diisocyanate (4,4′-MDI), mixtures of 2,4′- and 4,4′-MDI, carbodiimide/uretonimine-modified MDI derivatives and higher polycyclic homologs of the diphenylmethane series, diisocyanatotoluenes, hexamethylene diisocyanate, isophorone diisocyanate, and mixtures thereof in a molar excess.