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Electrophotographic Layers

IP.com Disclosure Number: IPCOM000092408D
Original Publication Date: 1966-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 13K

Publishing Venue

IBM

Related People

Clarke, FR: AUTHOR [+2]

Abstract

Two layers for use in electrophotography having increased speed and sensitivity to light are obtained by using blends including high-speed or doped zinc oxide. The layers can be used as coatings on paper. The coatings are well-suited to formation on them of an electrostatic image and to permanently hold the final image after development and fixing.

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Electrophotographic Layers

Two layers for use in electrophotography having increased speed and sensitivity to light are obtained by using blends including high-speed or doped zinc oxide. The layers can be used as coatings on paper. The coatings are well- suited to formation on them of an electrostatic image and to permanently hold the final image after development and fixing.

To compound both layers the following mixture A is first blended with the use of high-speed agitation by steel blades. MIXTURE A

Toluene 100 grams Erioglaucine Solution (Color Index 42090 - Solid material purchased

from Matheson Coleman & Bell

Division of Matheson Co., Inc.) 5 milliliters

As 0.004 gram per milliliter

solution in methanol.

High Speed ZnO (No. 006-69 - The New Jersey Zinc Co.) 40 grams.

After thorough mixing, mixture A is allowed to stand for five minutes to allow the mixture to cool.

To obtain a layer quite fast in light response and with a wide range of spectral sensitivity, the following is done. The layer obtained has a slightly gray, white hue.

To mixture A is added 66 grams of a styrenated alkyd resin (Glidden Co. 2KB-789) with mixing. Then 160 grams of French process zinc oxide (Photox 801 - The New Jersey Zinc Co.) is added with mixing. Finally, a mixture is added of 4 milliliters of bromocresol green solution (solution of 0.004 gram per milliliter in ethyl alcohol) and 3 milliliters of bromocresol purple solution (solution of 0.004 gram per milliliter in ethyl alcohol).

Choice of the two dyes added last is quit...