| 摘要 |
<p>Producing polyurethane foams, comprises reacting an isocyanate component with a component reactive against isocyanate comprising (A) one or more polyols with an average hydroxyl-functionality of 2-3 obtainable by copolymerization of 50-85 wt.% of ethylene oxide and 15-50 wt.% of propylene oxide and/or 1,2-butylene oxide in the presence of one or more initiator molecule having an average hydroxyl-functionality of 2-3, and (B) one or more polyols with an average hydroxyl-functionality of 2-6. Producing polyurethane foam, comprises reacting an isocyanate component with a component reactive against isocyanate comprising (A) one or more polyols with an average hydroxyl-functionality of 2-3 obtainable by copolymerization of 50-85 wt.% of ethylene oxide and 15-50 wt.% of propylene oxide and/or 1,2-butylene oxide in the presence of one or more initiator molecule having an average hydroxyl-functionality of 2-3, (B) one or more polyols with an average hydroxyl-functionality of 2-6 obtainable by copolymerization of 1-25 wt.% of ethylene oxide and 75-99 wt.% of propylene oxide and/or 1,2-butylene oxide in the presence of one or more initiator molecule having an average hydroxyl functionality of 2-6, (C) one or more polyols with an average hydroxyl-functionality of 1-6 obtainable by copolymerization of 1-30 wt.% of carbon dioxide and 70-99 wt.% of ethylene oxide, propylene oxide and/or 1,2-butylene oxide in the presence of one or more initiator molecule having an average hydroxyl-functionality of 1-6. The amount of ethylene oxide units in the polyols is 30-50 wt.% based on the total weight of the polyols available in the component reactive against isocyanate. The amount of the ethylene oxide, propylene oxide and 1,2-butylene oxide is 100 wt.%.</p> |
