| 摘要 |
<p>A composition comprising: an effective amount sufficient to inhibit polymerisation of an ethylenically unsaturated monomer or mixture of monomers polymerisable by free radical polymerisation of at least one compound which is capable of acting as a reducing agent ('Component 1') and at least one metal-containing compound where the metal is capable of existing in an ionic form with at least two different oxidation states ('Component 2') and optionally at least one compound capable of acting as a proton acid ('Component 3'), said composition comprising (i) 30 to 99.9 % by weight of Component 1 based on the total weight of Components 1 and 2 and 3; (ii) 0.1 to 25 % by weight of Component 2 based on the total weight of Components 1 and 2 and 3; and (iii) 0 to 69.9 % by weight of Component 3 based on the total weight of Components 1 and 2 and 3; and the use thereof as a free radical capture agent or scavenger, particularly for inhibiting polymerisation of an olefinic compound during distillation or purification or storage.</p> |
