| 摘要 |
Polyisocyanate addition products are made by reacting a polysiloxane having isocyanate reactive end groups, excess polyisocyanate and a compound selected from the group consisting of aliphatic alcohols, primary aliphatic amines, secondary aliphatic amines and mixtures thereof having a molecular weight of from 75 to 5000 and at least one tertiary amino group and/or oxyalkylene unit. In a preferred embodiment, the polysiloxane is reacted with excess polyisocyanate and the reaction product is subsequently reacted with the alcohol and/or amine. The addition products of this invention are particularly useful as mold release agents in the production of molded lacquer coated plastics by the "in-mold coating process. |
