| 摘要 |
Reactive stabilising compounds able to stabilise organic polymers, contain in their molecule a sterically hindered amino group and a hydrolysable silyl function. Three examples are: where m is zero or one, R' is hydrogen or methyl, Z is a bivalent group, R is an optionally substituted hydrocarbon radical, X is an alkyl radical, n is one, two or three and Y is an organic or inorganic radical. In stabilising organic polymers, these reactive stabilising compounds can be hydrolysed at the silyl function with the formation of silanol groups, which are made to interact in order to form complex resinous stabilising structures. These latter are added in stabilising quantities to the polymer to be stabilised. The hydrolysis at the silyl function and the formation of the resinous structure may take place spontaneously within the polymer to be stabilised. Furthermore, the reactive stabilising compound may be added to the polymer after being stably supported on a solid support by reaction with an inorganic solid having surface hydroxyl groups. Additionally, the reactive stabilising compound may be made to interact with the polymer so that the stabilising compound becomes chemically bonded to the polymer chains. In all cases, stabilised polymers are obtained containing the stabilising compound in a form which is not removable from the polymer. The process for preparing these reactive stabilising compounds involves sylylation, while preparation of the stabilised polymer compositions involves hydrolysis and resinification of the reactive stabilising compounds. |
