| 摘要 |
<p>An olefin polymer is stabilized with a mixture of at least two compounds having the 2-hydroxybenzophenone nucleus and substituents in at least one of positions 21, 3, 31, 4, 41, 5 51, 6 and 61 and optionally with further hydroxyl in position 21, 3, 31, 4, 41, 5 or 51. Optionally, diesters of thiodialkanoic acids, zinc dinonyl dithiophosphate and phenolic antioxidants may be present. The preferred phenones are the 2 - hydroxy - (4- or 5-) alkyl or alkoxy benzophenones. Specifications 991,641, 992,023 and 992,312 are referred to.</p> |
