Condensation products of o-phenylenediamine or 1,8-Diaminonaphthalene and 4,10-benzhioxanthane-3,1'-dicarbonic acid hydrocide, processes for their manufacture and use

摘要

This invention relates to a compound of the formula IMAGE I or IMAGE II wherein R is a phenylene or naphtylene group. The invention also relates to a process for making the novel compounds of the invention and also to an electrophotographic recording material employing the novel compounds of the invention.