A novel family of polyurethane foam has been created to replace more traditional siloxane and epichlorohydrin based polymers. These high-density foams tend to be conductive in the range of 1E8 to 1E9 ohms. The electrical resistance, as well as the mechanical behavior, can be tailored to provide desired properties.
Joseph W. Lovette, "Novel Polyurethane Materials for Use in Digital Imaging Equipment" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP20), 2004, pp 132 - 133, https://doi.org/10.2352/ISSN.2169-4451.2004.20.1.art00032_1