Additive for electronic photographic toner, electronic photographic toner and electronic photographic developer
An electrophotography and additive technology, applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc., can solve the problems that are not mentioned, cannot meet the requirements of hydrophobic characteristics, and cannot know the mixed state and other problems, to achieve the effect of preventing cutting and wear
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[0153] 3.0 parts of polydimethylsiloxane (manufactured by Shin-Etsu Chemical Co., Ltd.) with a viscosity of 350 cs was dissolved in 100 parts of toluene, and 30 parts by weight of silicon dioxide OX-50 (manufactured by Japan Aerosil Co., Ltd. diameter of 40 nm) and dispersed therein by ultrasonic irradiation. After visually confirming that there were no aggregates, toluene was distilled off using a rotary evaporator. The obtained solid was dried to a constant weight in a decompression drier at a set temperature of 50°C. Further, heat treatment was performed at 200° C. for 2 hours in an electric furnace under nitrogen flow. The resulting powder was pulverized by a jet mill and collected by a bag filter. Based on the Py-GCMS analysis of the residual components obtained from the chloroform treatment of the additive, the hydrophobization treatment dispersion conditions, heat treatment conditions, etc. were adjusted so as to contain a polyorganosiloxane structure.
[0154] Man...
Embodiment 2
[0194] In Example 1, the evaluation was performed as in Example 1, except that the hydrophobizing treatment conditions were adjusted so that the chloroform-treated residual component of the fluidizing agent contained at least an organopolysiloxane structure (the above general formula A).
Embodiment 3
[0196] In Example 1, in addition to adjusting the type of hydrophobizing treatment agent, mixing conditions, heat treatment conditions, etc., so that the thermally decomposed components of the chloroform-treated residual components of the fluidizing agent contain at least a cyclic organopolysiloxane structure (the above general Formula B, but 3≤n), the others are evaluated as in Example 1. The Py-GCMS chromatogram of the thermally decomposed components of the chloroform-treated residual components of this fluidizing agent is shown in FIG. 1 .
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