| 摘要 |
<p>An acylated or alkylated polyoxymethylene of high molecular weight is stabilized by adding indol or one of its derivatives in the proportion of between 0.01 to 5% based on the polymer. Specified stabilizers include 2-phenyl-2-phenyl-41-ethoxy-, 2-phenyl-41-propoxy-, 3-nitroso-, 3-nitro-, 2,3-dichloro-, and 1-5-dimethyl-indols. Known stabilizers, e.g. phenols, polyamides, aromatic amines, and organic sulphur compounds, as well as fillers, e.g. carbon black and other additives, may also be present.</p> |
