Toner

#1. Field of the Invention

#This invention relates to a toner used in recording processes such as electrophotography, electrostatic recording, magnetic recording and toner jet recording.

#2. Related Background Art

#The present invention is described below in greater detail by giving Examples. The present invention is by no means limited to these.

#As a raw-material wax, 1,000 g of Fischer-Tropsch wax (number-average molecular weight Mn: 718; average number of carbon atoms: 50.5) was put into a cylindrical reactor made of glass. Blowing nitrogen gas thereinto at a low rate (3 liters/minute), the temperature was raised to 140° C. Then, 26.3 g (0.41 mole) of a mixed catalyst of boric acid and boric anhydride in a molar ratio of 1.45 was added. Thereafter, blowing air (21 liters/minute) and nitrogen (16 liters/minute) into the reactor, the reaction was carried out at 180° C. for 2.5 hours. After the reaction was completed, an equivalent weight of hot water (95° C.) was added to hydrolyze the reaction mixture. Thereafter, this was allowed to stand and the wax having come separated to the upper layer was collected. The wax collected was washed with water to obtain a wax 1.

#The wax 1 had an acid value of 7.5 mg·KOH/g, a hydroxyl value of 49.2 mg·KOH/g, an ester value of 14.3 mg·KOH/g, a melting point of 87.3° C., a viscosity at 120° C. of 12.2 mPa·s, a penetration of 6, a softening point of 92.5° C. and an Mn of 610. These physical properties of the wax 1 are shown in Table 1.