B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 31/12 (2006.01) C08G 63/82 (2006.01) C08G 64/30 (2006.01) C08G 65/26 (2006.01)
Patent
CA 2306419
The invention concerns a composition based on a grafted metal oxide, its preparation and its use in a polymerisation method by opening oxygenated cycles such as alkyl oxides, cyclic esters or cyclic carbonates. Said composition comprises a support selected in the group of metal oxides capable of having hydroxyl functions, whereon is grafted a group of formula (1): M(OR)¿n? in which M is an element selected among scandium, zirconium, hafnium, niobium, tantalum, rare earths and actinides; R is an organic group and n is whole number not less than 1. The composition is prepared by forming a suspension of said support, then contacting and reacting said suspension with a compound of formula (2): M(OR)¿n+1? in which M, R and n are defined as above.
L'invention concerne une composition à base d'un oxyde métallique greffé, sa préparation et son utilisation dans un procédé de polymérisation par ouverture de cycles oxygénés comme les oxydes d'alkyles, les esters cycliques ou les carbonates cycliques. La composition comprend un support choisi dans le groupe des oxydes métalliques susceptibles de présenter des fonctions hydroxyles, sur lequel est greffé un groupement de formule (1): M(OR)n dans laquelle M est un élément choisi parmi le scandium, le zirconium, l'hafnium, le niobium, le tantale, les terres rares et les actinides, R est un groupement organique et n est un nombre entier supérieur ou égal à 1. La composition est préparée en formant une suspension du support précité puis en mettant en contact et en faisant réagir cette suspension avec un composé de formule (2): M(OR)n+1 dans laquelle M, R et n sont définis comme précédemment.
Delaite Christelle
Hamaide Thierry
Spitz Roger
Tortosa Karine
Rhodia Chimie
Robic
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