Method for extending the functional life of polymers used in xerographic devices
AssigneeXerox Corporation
InventorsGeorge J. Safford, James A. Lentz
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Abstract
A method is disclosed for extending the electrical life of copolymers of butadiene and terminally unsaturated hydrocarbon nitriles by incorporating salts having asymmetrical quaternary ammonium cations or salts having structural charge specific anions therein. The method and polymers are useful for extending the functional electrical life and electrical stability of materials used in xerographic devices where control of and minimizing of the variations in the resistivity under applied voltages vs. time is important, e.g., in bias transfer rolls.
Claims31
A method for controlling the electrical life of copolymers of butadiene and terminally unsaturated hydrocarbon nitrile comprising incorporating varying concentrations of at least one salt selected from the group of phosphonium salts and quaternary ammonium salts, said salt having an asymmetrical cation in the copolymer.
A method of controlling the electrical life of copolymers of butadiene and terminally unsaturated hydrocarbon nitrile comprising incorporating at least one salt selected from the group consisting of phosphonium and quaternary ammonium salts, said salt having an asymmetrical cation in the copolymer and varying the asymmetry of the cation.
A method for controlling the electrical life of copolymers of butadiene and terminally unsaturated hydrocarbon nitrile comprising incorporating varying concentrations of at least one salt selected from the group consisting of phosphonium salts and quaternary ammonium salts, said salt having a structural charge specific anion in the copolymer.
A method of increasing the electrical life of a biasable transfer member having at least one coating of an elastomeric material, the elastomeric material being the reaction product of a butadiene/nitrile-containing copolymer and a suitable functional agent selected from the group consisting of a diisocyanate, a dibasic acid and a functional epoxy, upon a conductive substrate for supporting a uniform bias potential thereon, comprising incorporating varying concentrations of a salt selected from the group consisting of phosphonium salts and quaternary ammonium salts, said salt having an asymmetrical cation in the copolymer;
- dissolving the salt having asymmetrical cation in the copolymer;
- reacting the copolymer having the salt having asymmetrical cation therein with the suitable functional agent to produce a reaction product containing the solubilized salt having asymmetrical cation;
- and coating the reaction product having the solubilized salt having asymmetrical cation therein on the conductive substrate, the diisocyanate reaction product being a polyurethane, the dibasic acid reaction product being an elastomeric ester, and the difunctional epoxy reaction product being an epoxy reaction product.
A method of increasing the electrical life of a biasable transfer member having at least one coating of an elastomeric material, the elastomeric material being the reaction product of a butadiene/nitrile-containing copolymer and a suitable functional agent selected from the group consisting of a diisocyanate, a dibasic acid and a difunctional epoxy, upon a conductive substrate for supporting a uniform bias potential thereon, comprising incorporating salts selected from the group consisting of phosphonium salts and quaternary ammonium salts, said salt having asymmetrical cations in the copolymer, the salts having varying cation asymmetry;
- dissolving the salt having the varying asymmetrical cation in the copolymer;
- reacting the copolymer having the salt having asymmetrical cation therein with the suitable functional agent to produce a reaction product containing the solubilized salt having asymmetrical cation therein on the conductive substrate, the diisocyanate reaction product being a polyurethane, the dibasic acid reaction product being an elastomeric ester, and the difunctional epoxy reaction product being an epoxy reaction product.
A method of increasing the electrical life of a biasable transfer member having at least one coating of an elastomeric material, the elastomeric material being the reaction product of a butadiene/nitrile-containing copolymer and a suitable functional agent selected from the group consisting of a diisocyanate, a dibasic acid and a difunctional epoxy, upon a conductive substrate for supporting a uniform bias potential thereon, comprising incorporating varying concentrations of a salt selected from the group consisting of phosphonium salts and quaternary ammonium salts, said salt having a structural charge specific anion in the copolymer;
- dissolving the salt having structural charge specific anion in the copolymer;
- reacting the copolymer having the salt having structural specific anion therein with the suitable functional agent to produce a reaction product containing the solubilized salt having structural charge specific anion therein on the conductive substrate, the diisocyanate reaction product being a polyurethane, the dibasic acid reaction product being an elastomeric ester, and the difunctional epoxy reaction product being an epoxy reaction product.
Dependencies are inferred from the claim text.