abstract |
A process for the purification of organic polyisocyanates by mixing the polyisocyanates with 0.001 to 1 wt .-% of compounds containing trimethylsilyl groups at 20 to 150 ° C and optionally subsequent degassing or working up by distillation, the polyisocyanates thus purified and their use for the production of polyurethane plastics, in particular of polyurethane foams. |