Binder resin for photosensitive layers and electrophotographic photoreceptor belts

摘要

An electrophotographic photoreceptor belt which is excellent in durability and therefore little cracks even when fingerprints of an operator or hand cream adheres to the belt, wherein a binder resin for photosensitive layers comprising as the main component a polycarbonate resin which comprises bisphenol A type constituent units represented by the formula (I) as the main constituent unit (preferably in an amount of at least 90% by weight based on the whole of the constituent units) and which has a limiting viscosity of 1 to 1.6 dl/g and preferably a molecular weight distribution of 3.2 to 4.3 as calculated from the weight-average molecular weight and number-average molecular weight determined by GPC is used in a photosensitive layer (particularly carrier transport layer) of the belt.;

主权项

1. An electrophotographic photoreceptor belt having a photosensitive layer on a conductive support belt substrate, said photosensitive layer comprising a binder resin for a photosensitive layer, wherein said binder resin comprises a polycarbonate resin as a main component and a silicone-copolymerized polyurethane as an additional polymer,
wherein: said polycarbonate resin comprises a constituent unit derived from bisphenol A represented by the following formula (I) as a main constituent unit, said polycarbonate resin has an intrinsic viscosity of 1 to 1.6 dl/g, and an amount of said silicone-copolymerized polyurethane is 0.1 to 0.6% by weight based upon a total amount of said binder resin,