Release Agent for Toner, and Toner

Example 1

[0070]In a 1 liter four necked flask equipped with a Dimroth condenser, a thermometer, a nitrogen inlet tube, and a stirrer, 120 g of α-olefin polymer A1 was placed to be melt by raising the temperature to 190° C. with the introduction of nitrogen. After 40 g of styrene and 2 g of dicumylperoxide were added during the space of time of 1 hour, the reaction mixture was retained at 190° C. for 1 hour. A following vacuum distillation with the pressure of 7 hPa at 190° C. for 1 hour provided the release agent for toner R1. R1 had 85 mass % of 2-butanone insoluble component, the melting point (Tm) of 52° C., which was represented by a single DSC peak having the half-height width of 8.3° C., and the weight average molecular weight (Mw) of 43,000.

Example 2

[0071]The release agent for toner R2 was provided in the same method as example 1 except that the α-olefin polymer A2 was used instead of A1.

[0072]R2 had 87 mass % of 2-butanone insoluble component, the melting point (Tm) of 70° C., which was represented by a single DSC peak having the half-height width of 6.0° C., and the weight average molecular weight (Mw) of 9,000.

Example 3

[0073]In a 1 liter four necked flask equipped with a Dimroth condenser, a thermometer, a nitrogen inlet tube, and a stirrer, 120 g of α-olefin polymer A2 was placed to be melt by raising the temperature to 160° C. with the introduction of nitrogen. After 80 g of styrene and 4 g of dicumylperoxide were added during the space of time of 1 hour, the reaction mixture was retained at 160° C. for 1 hour. A following vacuum distillation with the pressure of 7 hPa at 190° C. for 1 hour provided the release agent for toner R3. R3 had 74 mass % of 2-butanone insoluble component, the melting point (Tm) of 67° C., which was represented by a single DSC peak having the half-height width of 6.0° C., and the weight average molecular weight (Mw) of 20,000.