摘要 |
This invention relates to a toner for developing an electrostatically charged image of a heat roller type copier or printer, the toner consisting essentially of a binder resin, a colorant and a charge control agent, in which the binder resin at least includes a polyolefin resin having a cyclic structure, and a polyolefin resin of a cyclic structure having an intrinsic viscosity (i.v.) of 0.25 dl/g or more, a heat distortion temperature (HDT) by DIN53461-B of 70 .degree.C or higher, and a number average molecular weight of 7,500 or more and a weight average molecular weight of 15,000 or more, as measured by GPC, is contained in a proportion of less than 50% by weight based on the entire binder resin. The toner for developing an electrostatically charged image according to the invention is excellent in fixability, light transmission, and anti-toner spent properties, giving a sharp, high quality image, can be applied to any of a dry one-component magnetic toner, a dry one-component nonmagnetic toner, a dry two-component toner anal a liquid toner, and exhibits marked effects particularly when used in a color toner. |
申请人 |
HOECHST RESEARCH & TECHNOLOGY DEUTSCHLAND GMBH & CO. KG |
发明人 |
HELMER-METZMANN, FREDDY;LAND, HORST-TORE;NISHIOKA, TOSHIMI;NAKAMURA, TORU;HOGA, TAKUYA;FUZUKAWA, JUNICHI;KUROKAWA, NOBUYUKI |