Molaire Consulting

US 5,238,764 : Electrophotographic elements containing a titanyl fluorophthalocyanine pigment

 

Inventors:
Molaire, Michel F. (Rochester, NY)
Patti, Robert J. (Webster, NY) 
Assignee:     Eastman Kodak Company (Rochester, NY) 

The invention provides an electrophotographic element comprising an electrically conductive substrate and a photoconductive layer, wherein the photoconductive layer has been formed from a coating solution of a polymeric binder and an organic solvent having a gammac hydrogen bonding parameter value greater than 9.0, the coating solution having dispersed therein a titanyl fluorophthalocyanine pigment which has been acid-pasted or salt-milled to increase its photosensitivity and then has been brought into contact with an organic solvent having a gammac hydrogen bonding parameter value less than 8.0 to preserve its increased photosensitivity, prior to the pigment's being dispersed in the coating solution.

http://www.freepatentsonline.com/5238764.pdf

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