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Browse Prior Art Database

THERMOPLASTIC COMPOSITION FOR CARBON BLACK ELECTRODE

IP.com Disclosure Number: IPCOM000024295D
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 59K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a process for preparing a hole-injecting electrode, which could be useful in various overcoated photoreceptor devices. This process involves embedding carbon black in a thermoplastic polyurethane, which is not cross-linked, and drying the resultant materials at a specific temperature such as 180'F. In one embodiment, the carbon black electrode is prepared by ball milling a dispersion of 6.5 grams of Estane 5701 F-1 (a polyurethane commerically available from B. F. Goodrich Chemical Company), 5.4 grams of Monarch 1300 carbon black, 32.5 mils of acetone and 32.5 mils of tetrahydrofuran in a 4 ounce bottle for 22 hours. The dispersion was then coated on a 5 mil Mylar substrate with a 1.5 mil Bird applicator and allowed to dry in an oven at 180°F for fifteen minutes, resulting in a carbon black electrode coated on a Mylar substrate.

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KEROX DISCLOSURE JOURNAL

THERMOPLASTIC COMPOSITION FOR CARBON BLACK ELECTRODE Lieng-Huang Lee
Donald S. Sypula

Proposed Classification
U.S. CI. 96/1.5 Int. C1. G03g 5/04

Disclosed is a process for preparing a hole-injecting electrode, which could be useful in various overcoated photoreceptor devices. This process involves embedding carbon black in a thermoplastic polyurethane, which is not cross-linked, and drying the resultant materials at a specific temperature such as 180'F. In one embodiment, the carbon black electrode is prepared by ball milling a dispersion of
6.5 grams of Estane 5701 F-1 (a polyurethane commerically available from B. F. Goodrich Chemical Company), 5.4 grams of Monarch 1300 carbon black, 32.5 mils of acetone and 32.5 mils of tetrahydrofuran in a 4 ounce bottle for 22 hours. The dispersion was then coated on a 5 mil Mylar substrate with a 1.5 mil Bird applicator and allowed to dry in an oven at 180°F for fifteen minutes, resulting in a carbon black electrode coated on a Mylar substrate.

The electrodes prepared can be used as a hole-injecting layer in a layered photo- responsive device. The photoresponsive device may, for example, be comprised from the bottom up of a substrate overcoated with a hole-injecting layer, which in turn is overcoated with a transport layer, followed by a generating layer and an insulating, polymeric resin overcoating layer.

Volume 5 Number 2 March/April 1980 133

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