Abstract: The invention is a self-cross-linked polyvinyl butyral (PVB) binder for organic photoconductors (OPC's) used in electrophotography. The no cross-linked form of the binder is available from Monsanto Co. in the U.S.A. a Butvar.TM., and from Sekisui Chemical Co. in Japan as Slek.TM.. I discovered that the PVB may be self-cross-linked by subjecting it to a thermal cure at between about 150.degree.-300.degree. C. for about 2 hours. I think other ways of cross-linking, for example, e-beam, UV or X-ray radiation, will achieve results similar to those I obtained with heat. No cross-linker, nor cross-linkable copolymer nor catalyst is required to accomplish the cross-linking. After self-cross-linking, the PV has good mechanical durability and good anti-solvent characteristics. In addition, he self-cross-linked PVB's glass transition temperature (T.sub.g) increases from about 65.degree. C. to about 170.degree. C.