# US 5,707,743 A · Polyurethane roller with high surface resistance

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- Number: US 5,707,743 A
- Document ID: US5707743A
- Status: Granted
- Kind: A
- Application number: 08/629,855
- Filed: 1996-04-09
- Granted: 1998-01-13
- Earliest claimed: 1996-04-09
- Assignees: Lexmark International, Inc.
- Inventors: Todd Lucas Janes; Johnny Dale Massie, II; Jean Marie Massie; Ronald Lloyd Roe; Donald Wayne Stafford
- Web page: https://patentgrep.com/patent/US5707743A

## CPC

- G03G 15/0818: {characterised by the structure of the donor member, e.g. surface properties}
- B29C 39/003: {characterised by the choice of material}
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/4277: {Caprolactone and/or substituted caprolactone}
- C08G 18/69: Polymers of conjugated dienes {(hydrogenated polymers of conjugated dienes C08G18/6208)}
- C08G 18/698: {Mixtures with compounds of group C08G18/40}
- C08G 18/831: {by oxygen-containing compounds inclusive of carbonic acid halogenides, carboxylic acid halogenides and epoxy halides (by aldehydes C08G18/84, by peroxides C08G18/86)}
- C08K 3/16: Halogen-containing compounds
- G03G 2215/0861: Particular composition or materials
- G03G 2215/0863: Manufacturing
- Y10T 428/31551: Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An electrophotographic developer roller is made by casting urethane prepolymer mixed with a butadiene, a trifunctional curative and ferric chloride powder. After curing, the roller is baked, which oxidizes the outer surface. The oxidized surface layer is electrically resistive, which is desirable in a developer roller. An excellent developer roller is achieved at low production cost.

## Claims

### Claim 1

An endless developer member comprising a body of polycaprolactone ester toluene-diisocyanate polyurethane, a conductive filler, and polydiene, of a lower alkane said member having an outer surface of oxidized polydiene of a lower alkane.

### Claim 2 (depends on 1)

The developer member of claim 1 in which said conductive filler is ferric chloride.

### Claim 3 (depends on 2)

The developer member of claim 2 in which said polydiene is polybutadiene.

### Claim 4 (depends on 1)

The developer member of claim 1 in which said polydiene is polybutadiene.

### Claim 5 (depends on 1)

The member as in claim 1 also comprising a minor amount of triisopropanolamine stabilizer for said polyurethane.

### Claim 6 (depends on 2)

The member as in claim 2 also comprising a minor amount of triisopropanolamine stabilizer for said polyurethane.

### Claim 7 (depends on 3)

The member as in claim 3 also comprising a minor amount of triisopropanolamine stabilizer for said polyurethane.

### Claim 8 (depends on 4)

The member as in claim 4 also comprising a minor amount of triisopropanolamine stabilizer for said polyurethane.