Fluoroelastomer and silicone blend compositions and fuser...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 27/20 (2006.01) C08L 83/04 (2006.01) G03G 15/20 (2006.01)

Patent

CA 2211544

A blend of a cured fluoroelastomer and silicone suitable for the outer suface layer of a fuser member which does not require the use of mercapto functional active release agents to prevent offset is provided. The fluoroelastomer component of the compositions contain at least 23.4 mole percent hexafluoropropylene, and preferably do not contain any metal oxide. The blend can be prepared by dissolving the fluoroelastomer in a solvent and adding a siloxane and catalyst and allowing the siloxane to cure. Alternatively, the siloxane can be added to the fluoroelastomer in the solvent in the presence of a catalyst and then added to the fluoroelastomer in the solvent.

L'invention concerne un mélange de fluoroélastomère et de silicone polymérisés adaptés à la couche de surface extérieure d'un élément de fusion, lequel ne nécessite pas l'utilisation d'agents de libération actifs à fonctionnalité mercapto afin d'empêcher un décalage. Le constituant fluoroélastomère des compositions contient au moins 23,4 mole pour cent d'hexafluoropropylène, et de préférence il ne contient pas d'oxyde de métal. Le mélange peut être préparé par dissolution du fluoroélastomère dans un solvant, et addition d'un siloxane et d'un catalyseur, puis polymérisation du siloxane. Dans une variante, on peut ajouter le siloxane au fluoroélastomère dans le solvant, en présence d'un catalyseur, puis l'ajouter au fluoroélastomère dans le solvant.

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