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

Claim 0:
1. A polycarbonate polyol having an OH number of 40 to 80 mg KOH/g according to DIN 53240-1 of June 2013 (without catalyst) and a mean functionality of 1.9 to 2.2, comprising the reaction product of
A) at least one a,w-alkanediol having 4 to 8 carbon atoms,
B) at least one polytetrahydrofuran, and
C) diethylene glycol with at least one
D) carbonyl component selected from the group consisting of diaryl carbonates, dialkyl carbonates, cyclic alkylene carbonates and COCl2, and mixtures thereof.