Toner
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorsTsutomu Katsumata, Koichi Kuroyama
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Abstract
A toner comprising a coloring agent, an amorphous polyester, a crystalline polyester, ester wax comprising of multiple ester compounds, each having a carbon number selected from 32 to 54 and, hydrophobic silica having an average primary particle diameter of 8 to 35 nm, wherein when the ion intensity ratio of each ester compound having a different carbon number is expressed as percentage, the content (a) of the ester compound having a carbon number of (Cn) showing the maximum intensity ratio is from 20 to 55% by weight of the entire ester wax, and the sum (d) of the content (b) of the ester compound having a carbon number of (Cn−4) and the content (c) of the ester compound having a carbon number of (Cn−2) satisfies the following formula: 0.619≦d/a≦0.783.
Claims10
A toner, comprising:
- a coloring agent;
- an amorphous polyester;
- a crystalline polyester;
- ester wax comprising of multiple ester compounds, each having a carbon number selected from 32 to 54 and,
- hydrophobic silica having an average primary particle diameter of 8 to 35 nm,
- wherein when the ion intensity ratio of each ester compound having a different carbon number is expressed as percentage, the content (a) of the ester compound having a carbon number of (Cn) showing the maximum intensity ratio is from 20 to 55% by weight of the entire ester wax,
- and the sum (d) of the content (b) of the ester compound having a carbon number of (Cn−4) and the content (c) of the ester compound having a carbon number of (Cn−2) satisfies the following formula:
- 0.619≦d/a≦0.783.
Dependencies are inferred from the claim text.