Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Toner resin
 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.degree. to 68.degree. 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.degree. 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.degree. to 410.degree. 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. 
Mitsubishi Rayon Company Ltd.
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G03G G03G
inventional inventional
Syuji Masahiro Keiji Motoshi Hirokazu
Takahiro Itoh Yoshida Inagaki Ito