| abstract |
A toner resin, comprising a styrene component, an acrylic acid ester component or methacrylic acid ester component or both, and a divinyl monomer component, the resin having a glass transition temperature of 50 DEG to 68 DEG C., a value of tan delta , which is the ratio of the dynamic loss to the dynamic elastic modulus, of 0.3 to 0.7 as measured at 200 DEG C., a gel fraction of 55 to 83%, and a softening point at which the resin has a melting viscosity of 100,000 poises is 200 DEG to 410 DEG C. A toner having an excellent fixing property, non-offsetting property, and blocking resistance, and able to be used with a high-temperature high-speed copying machine is formed from this toner resin. |