| 摘要 |
... a) polyisocyanates with b) polyesters having a molecular weight of from 400 to 10,000 which contain at least two hydroxyl groups and have been subjected, after their preparation, to continuous distillation at a mean residence time of from 2 to 600 seconds and a temperature of from 160 to 250 DEG C, preferably from 180 to 230 DEG C, and a pressure of from 0.05 to 10 mbar, preferably from 0.1 to 3 mbar, in the presence of c) water and/or readily volatile organic compounds as blowing agent and optionally in the presence of d) compounds having a molecular weight of from 32 to 400 which contain least two active hydrogen atoms as chain extenders and crosslinking agents, and optionally in the presence of e) auxiliaries and additives known per se, and are used in transport means (transportation), preferably automobiles (cars).
|
