| 简介 |
A mixture comprises a polycarbonate polyol with a decomposition temperature of ≥ 180 °C at ≥ 0.1 mbar to ≤ 1 mbar which is based on at least two different diols selected from the group consisting of C4, C5 and C6 diols, the mixture having an altogether low amount of amines and/or ammonium ions, alkali metal atoms and/or ions, earth alkali metal atoms and/or ions, metals and/or ions of the 13th through 15th Group of the Periodic Table of the Elements (i.e. metals from Boron, Carbon and Nitrogen Group), and transition metal atoms and/or ions of the 4th through 12th Group of the Periodic Table of the Elements in relation to the total weight of the polycarbonate polyol. Furthermore, the pH value of the 10 weight-% slurry of this mixture in water lies in the range from ≥ 5.0 to ≤ 8.0. The present invention also relates to the use of these polyols for the production of polyurethanes, in particular dispersions and thermoplastic polymers. |
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