| abstract |
An additive which is suitable for increasing the compression hardness in the production of flexible polyurethane foam which contains at least one compound (V), (i) the at least three isocyanate-reactive hydrogen atoms, (ii) an average hydroxyl value, determined in accordance with DIN 53240-1: 2013- 06, from 80 to 280 mg KOH / g, preferably from 100 to 250 mg KOH / g, and (iv) contains ≥ 50 wt .-% ethylene oxide bound in the molecule, wt .-% based on the total alkylene oxide, and a method for the production of polyurethane foams as well as a polyurethane foam and its use are described. |