US Patent 7727697 Electrophotographic toner and electrophotographic developer by use thereof

An electrophotographic toner is disclosed, meeting the requirement that a ratio of a storage modulus at 60° C. [G′(60)] to a storage modulus at 80° C. [G′(80)], G′(60)/G′(80) is from 1×102 to 1×104; a ratio of a storage modulus at 100° C. [G′(100)] to a storage modulus at 120° C. [G′(120)], G′(100)/G′(120) is from 1 to 10; and a storage modulus at a temperature of from 140 to 160° C., [G′(140-160)] is not less than 102 dyn/cm2.