Resin for toners, and toner
A technology of toner and resin, which is applied in the direction of developer, instrument, optics, etc., and can solve problems such as insufficient charging performance
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[0169] (i) Preparation of reagents
[0170] 1.0 g of phenolphthalein was dissolved in 90 ml of ethanol (95% by volume), and ion-exchanged water was added thereto so as to make a total of 100 ml, thereby obtaining a phenolphthalein solution.
[0171] 7 g of premium pure potassium hydroxide was dissolved in 5 ml of water, and ethanol (95% by volume) was added thereto so as to make 1 liter in total. In order not to expose the solution to carbon dioxide and the like, the solution was put into an alkali-resistant container, then left to stand for 3 days, and then filtered to obtain a potassium hydroxide solution. Store the obtained potassium hydroxide solution in an alkali-resistant container. For the factor of potassium hydroxide solution, titration with potassium hydroxide solution is carried out by putting 25 ml of 0.1 mol / l hydrochloric acid into an Erlenmeyer flask and adding a few drops of phenolphthalein solution to it, thereby performing the titration with potassium hydrox...
Embodiment 1
[0264] Into a reaction vessel provided with a stirrer, a condenser, a thermometer, and a nitrogen supply pipe, 60.00 parts of toluene were supplied and refluxed in a nitrogen stream.
[0265] Next, the following monomers and a solvent were mixed to prepare a monomer mixture.
[0266] Monomer composition and mixing ratio:
[0267]
[0268] To this monomer mixture, 6.60 parts of tert-butylperoxyisopropyl monocarbonate (75% hydrocarbon solvent dilution product) was further mixed as a polymerization initiator, and the obtained mixture was added dropwise to Those in the above reaction vessel. The contents were stirred at 110°C for 4 hours, then cooled to room temperature. The obtained polymer-containing composition was added dropwise to a mixed solvent of 1,400 parts of methanol and 10 parts of acetone under stirring over a period of 10 minutes, thereby precipitating and crystallizing the resin composition. The obtained resin composition was filtered, followed by washing twic...
Embodiment 2 to 13 and comparative example 1 to 4
[0270] Polymers B to M and R to U were obtained in the same manner as in Example 1 except that the monomer formulation and mixing ratio were changed as shown in Table 1.
[0271] Table 1
[0272]
[0273] The compositional ratios and molecular weights of the polymers A to M and R to U obtained in Examples 1 to 13 and Comparative Examples 1 to 4 are shown in Tables 2 and 3, respectively.
[0274] Table 2
[0275]
[0276] table 3
[0277]
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