| 摘要 |
<p>Process for preparing diamino diphenyl methane and poly-(diamino diphenyl methane) comprising reacting aniline with formaldehyde in the presence of hydrogen chloride added in the gaseous form wherein the aniline contains 0.1 to 7 wt%, preferably 2 to 5 wt% of a protic chemical, preferably water.</p> |
