| 摘要 |
<p>A purified low pressure polymer of an olefin has its thermal stability improved by uniformly dispersing therein, under inert conditions and following the removal of catalyst residues, from 0.001 to 1% of an alkali metal or alkaline earth metal hydroxide and then one or more known stabilizers. The hydroxides used in the examples are KOH, NaOH, Ca(OH)2 and Sr(OH)2. The stabilizers may be selected from secondary aromatic amines and sterically hindered phenols, in particular 4,41-thio-bis-(3 - methyl - 6 - t. - butylphenol) + dilauryl thiodipropionate.</p> |
