| 摘要 |
<p>This invention relates to a process for the production of a polyurethane elastomer by reacting a reaction mixture via the reaction injection molding process in a one-shot process at an isocyanate index of from 90 to 120. This reaction mixture comprises: (A) an isocyanate-reactive component having a molecular weight of 400 to 12,000, a functionality of about 2 to about 8 and being capped with 13 to 21 % by weight of ethylene oxide, wherein the isocyanate-reactive groups are selected from the group consisting of hydroxyl groups, amine groups and mixtures thereof; (B) an isocyanate-reactive component comprising (1) an isocyanate-reactive component containing at least two hydroxyl groups and having a molecular weight of from 62 to 399, and (2) an isocyanate-reactive component selected from the group consisting of (a) an isocyanate-reactive group containing tertiary amine polyether corresponding to a specific formula, (b) at least one organic amine compound containing at least two amine groups which are reactive with isocyanate groups; (c) potassium halide; (d) an internal mold release agent; (e) at least one catalyst, and (f) a polyisocyanate component, and optionally, one or more surfactants.</p> |
