Patent EP0332438A2 successfully refreshed from Google Patents.
EP0332438A2
Expired / Lapsed
EP
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Fuser member
Assignee: Xerox Corp
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Filing: 1989-03-09
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Granted: —
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Expires: 2009-03-09
Abstract
Abstract A fuser member (1) and fuser system of a type wherein a polymeric release agent having functional groups supplied to the surface of the fuser member has an elastomer fusing surface comprising poly(vinylidenefluoride-hexafluoropropylene-tetrafluoroethylene), wherein the vinylidenefluoride is present in the amount less than 40 mole percent, a metal oxide is present in amounts sufficient to interact with the polymer release agent having functional groups to provide an interfacial barrier layer between the fusing surface and the toner, and being substantially unreactive with the elastomer, and wherein the elastomer is cured from a solvent solution thereof with a nucleophilic curing agent soluble in the solution and in the presence of less than 4 parts by weight of inorganic base per 100 parts by weight of polymer with the inorganic base being effective to dehydrofluorinate the vinylidenefluoride at least partially.
Inventors
- 👤 Clifford O. Eddy
- 👤 Arnold W. Henry
- 👤 Lynn Lorenzo
- 👤 Che Chung Chow
- 👤 Robert M. Ferguson
- 👤 Robert N. Finsterwalder
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 11:08
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
151 words
A fuser member (1) for fusing thermoplastic resin toner images (14) to a substrate (12) in a fuser system of the type wherein a polymeric release agent having functional groups is applied to the surface of the fuser member, the fuser member comprising a base member and an elastomer fusing surface comprising poly(vinylidenefluoride-hexafluoropropylene-tetrafluoroethylene), where the vinylidenefluoride is present in an amount less than 40 mole percent, a metal oxide present in an amount sufficient to interact with the polymeric release agent to provide an interfacial barrier layer between the fusing surface and the toner and being substantially unreactive with the elastomer, the elastomer having been cured from a solvent solution thereof with a nucleophilic curing agent soluble in the solution and in the presence of less than 4 parts by weight of inorganic base per 100 parts of polymer, the inorganic base being effective to dehydrofluorinate the vinylidenefluoride at least partially.
Claim 2
Dependent Claim
151 words
A fuser member (1) for fusing thermoplastic resin toner images (14) to a substrate (12) in a fuser system of the type wherein a polymeric release agent having functional groups is applied to the surface of the fuser member, the fuser member comprising a base member and an elastomer fusing surface comprising poly(vinylidenefluoride-hexafluoropropylene-tetrafluoroethylene), where the vinylidenefluoride is present in an amount less than 40 mole percent, a metal oxide present in an amount sufficient to interact with the polymeric release agent to provide an interfacial barrier layer between the fusing surface and the toner and being substantially unreactive with the elastomer, the elastomer having been cured from a solvent solution thereof with a nucleophilic curing agent soluble in the solution and in the presence of less than 4 parts by weight of inorganic base per 100 parts of polymer, the inorganic base being effective to dehydrofluorinate the vinylidenefluoride at least partially.
Claim 3
Dependent Claim
16 words
The fuser member of claim 1, wherein the nucleophilic curing agent is a bisphenol crosslinking agent.
Claim 4
Dependent Claim
17 words
The fuser member of claim 2, wherein the nucleophilic curing agent further comprises an organophosphonium salt accelerater.
Claim 5
Dependent Claim
35 words
The fuser member of any preceding claim, wherein the metal oxide is cupric oxide which is present in an amount of from 5 to 30 parts by weight per 100 parts by weight of polymer.
Claim 6
Dependent Claim
20 words
The fuser member of claim 4, wherein the cupric oxide particles have a diameter of from 4 to 8 µm.
Claim 7
Dependent Claim
16 words
The fuser member of any preceding claim, wherein the elastomer contains a copolymerized cure site monomer.
Claim 8
Dependent Claim
40 words
The fuser member of any preceding claim, wherein the base member is cylindrical, and the elastomer fusing surface is a cylindrical outer layer on the base member, the outer layer having been formed by spraying the solvent solution on it.
Claim 9
Dependent Claim
21 words
The fuser member of claim 7, further including at least one elastomeric layer between the base member and the outer layer.
Claim 10
Dependent Claim
27 words
The fuser member of claim 8, wherein the or each elastomer layer is of poly(vinylidenefluoride-hexafluoropropylene-tetrafluoroethylene), where the vinylidenefluoride is present in an amount less than 40 mole.
Claim 11
Independent Claim
175 words
The method of fusing thermoplastic resin toner images to a substrate, comprising forming a film of a polymeric release agent having functional groups on the surface of a heated fuser member, the fuser member comprising: a base member and an elastomer fusing surface comprising poly(vinylidenefluoride-hexafluoropropylene-tetrafluoroethylene), where the vinylidene fluoride is present in an amount less than 40 mole percent, a metal oxide present in an amount sufficient to interact with the polymeric release agent having functional groups to provide an interfacial barrier layer between the fusing surface and the toner and being substantially unreactive with the elastomer, the elastomer having been cured from a solvent solution thereof with a nucleophilic curing agent soluble in the solution and in the presence of less than 4 parts by weight of inorganic base per 100 parts of polymer, the inorganic base being effective to dehydrofluorinate the vinylidenefluoride at least partially; contacting the toner images on the substrate with the heated elastomer surface for a period of time sufficient to soften the toner, and allowing the toner to cool.
Claim 12
Independent Claim
175 words
The method of fusing thermoplastic resin toner images to a substrate, comprising forming a film of a polymeric release agent having functional groups on the surface of a heated fuser member, the fuser member comprising: a base member and an elastomer fusing surface comprising poly(vinylidenefluoride-hexafluoropropylene-tetrafluoroethylene), where the vinylidene fluoride is present in an amount less than 40 mole percent, a metal oxide present in an amount sufficient to interact with the polymeric release agent having functional groups to provide an interfacial barrier layer between the fusing surface and the toner and being substantially unreactive with the elastomer, the elastomer having been cured from a solvent solution thereof with a nucleophilic curing agent soluble in the solution and in the presence of less than 4 parts by weight of inorganic base per 100 parts of polymer, the inorganic base being effective to dehydrofluorinate the vinylidenefluoride at least partially; contacting the toner images on the substrate with the heated elastomer surface for a period of time sufficient to soften the toner, and allowing the toner to cool.
Claim 13
Dependent Claim
18 words
The method of claim 10, wherein the toner contains distearyl dimethyl ammonium methyl sulfate as a charge-enhancing additive.
Claim 14
Dependent Claim
52 words
The method of claim 10, wherein the fuser member is a rotatable cylindrical roll, and the film is formed on the fusing surface by applying the release agent thereto in amounts such that on average less than about 4 microliters are transferred to the surface of an 216 x 280 mm substrate.
References Cited (Backward Citations)
No citation records indexed.
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