| 摘要 |
<p>PURPOSE:To impart adequate negative charge to a toner, to make water absorption low and to reduce environmental change by providing a block copolymer obtained by copolymerizing polyamide and polytetramethylene oxide at least on the surface. CONSTITUTION:This member for imparting triboelectric charge has the block copolymer obtained by copolymerizing the polyamide and the polytetramethylene oxide at least on the surface. In this case, the block coplanar to be used obtained by copolymerizing the polyamide and the polytetramethylene oxide is expressed by a formula [-CO-(PA)1-CCO-(PTMO)m-O-]n (where, PA is the polyamide component, PTMO is the polytetramethylene oxide). The block copolymer obtained by copolymerizing the polyamide and the polytetramethylene oxide is synthesized with the well-known method. And the polytetramethylene oxide component in the block copolymer is obtained by ring-opening polymerizing tetramethylene oxide in the presence of a catalyst or active hydrogen.</p> |
