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(11) | EP 0 657 789 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Fusing system, method of fusing and release agent for the fusing system in an electrostatographic printing apparatus |
(57) The method of fusing thermoplastic resin toner images (14) to a substrate (12) in
a fuser including a heated thermally stable FKM hydrofluoroelastomer fusing surface
(2) at elevated temperature prepared in the absence of anchoring sites for a release
agent of heavy metals, heavy metal oxides, or other heavy metal compounds forming
a film of a fluid release agent on the elastomer surface (2) of an amino functional
oil having the formula :
where 50≦n≧200, p is 1 to 5, and R1' R2 and R3 are alkyl or arylalkyl radicals having 1 to 18 carbon atoms, R4 is an alkyl or arylalkyl radicals having 1 to 18 carbon atoms and a polyorganosiloxane chain having 1 to 100 diorganosiloxy repeat units, and R5 is hydrogen, alkyl or arylalkyl radicals having 1 to 18 carbon atoms,the oil having sufficient amino functionality per active molecule to interact with the hydrofluoroelastomer surface in the absence of a heavy metal and heavy metal anchoring sites to provide an interfacial barrier layer to the toner and a low surface energy film to release the toner from the surface ; contacting the toner image on the substrate with the filmed heated elastomer surface to fuse the toner iage to the substrate and permitting the toner to cool. |