Electric photographic toner and its manufacture, electric photographic developer and imaging method
A technology of toner and electrophotography, which is applied in the directions of developer, electrography, optics, etc., and can solve problems such as inability to achieve low-temperature fixing
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Embodiment 1
[0192] Synthesis of crystalline polyester resin 1
[0193] 301 parts by weight of dimethyl terephthalate, 248 parts by weight of 1,9-nonanediol, and 0.3 parts by weight of a dibutyltin compound as a catalyst were placed in a two-necked flask that had been heated and dried. Then, the air in the vessel was removed, an inert atmosphere was made with nitrogen by a decompression operation, and the mixed solution was stirred at 180° C. for 5 hours by mechanical stirring.
[0194] Thereafter, the temperature was gradually raised to 230°C under reduced pressure, and the mixture was stirred for 2 hours. When the mixture became viscous, the reaction was quenched by air cooling the mixture. Thus, 340 parts by weight of crystalline polyester resin 1 (a crystalline polyester resin comprising an acid-derived component in which the content of an aromatic dicarboxylic acid-derived component is 100 mol % ( Composition), and an alcohol-derived component, wherein the content of the aliphatic d...
Embodiment 2
[0232] Synthetic crystalline polyester resin 2
[0233] Except that the amount of dimethyl terephthalate added in Example 1 "Synthesis of Crystalline Polyester Resin 1" was changed to 194 parts by weight, 248 parts by weight of 1,9-nonanediol was used with 216 parts by weight of 1, Instead of 11-undecanediol, 330 parts by weight of crystalline polyester resin 2 (a crystalline polyester resin comprising an acid-derived component in which, Aromatic dicarboxylic acid-derived components in an amount of 100 mol% (composition), and an alcohol-derived component in which a dihydric alcohol-derived component has a content of 100 mol% (composition)).
[0234] The weight-average molecular weight (Mw) of the crystalline polyester resin 2 (measured by gel permeation chromatography (polystyrene conversion)) was 9300, and the number-average molecular weight (Mn) was 4400.
[0235] Further, the melting point (Tm) of the crystalline polyester resin 2 was measured by differential scanning calo...
Embodiment 3
[0242] Synthetic crystalline polyester resin 3
[0243] Except that the amount of dimethyl terephthalate added in Example 1 "Synthesis of Crystalline Polyester Resin 1" was changed to 200 parts by weight, the amount of 1,9-nonanediol was changed to 188 parts by weight, and 8.5 The dimethyl fumarate of weight part, the 5-sulfoisophthalate sodium of 26 weight parts and the dimethylsulfoxide of 200 weight parts, synthesize the crystallization of 340 weight parts in the same way as Example 1 Shaped polyester resin3.
[0244] The obtained crystalline resin 3 was measured according to NMR (solvent: dimethylformamide-d7, TMS standard). In the composition obtained from the acid, the content of the composition obtained from terephthalic acid (8.1ppm) was 87.5mol% (composition), sodium 5-sulfoisophthalate (8.5ppm and 8.6ppm) The content of the obtained composition component was 7.5 mol % (composition), and the content of the obtained composition component of fumaric acid (6.8 ppm) was...
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