JP2011231217A5 - - Google Patents

Description

〔実施例及び比較例〕
＜バインダー樹脂の調製＞
バインダー樹脂製造例
撹拌機、冷却管、窒素ガス導入管を備えた四つ口フラスコに、酢酸エチルを仕込んで７５℃に加熱し、窒素ガスを導入しながら、表１記載のモノマー組成に従って各モノマー、開始剤としてジターシャリーブチルパーオキサイドの混合物を１．５時間かけて滴下し、更に同温度に保ちながら２時間共重合させた後、溶剤を減圧下で留去して、バインダー樹脂Ａ、Ｂ、Ｃ、Ｄ、Ｅを得た。
バインダー樹脂Ｅは、ジビニルベンゼンの含有量が多く、樹脂間の架橋密度が増大、ゲル化したことにより、分子量測定が不可能であり、使用不可能と判断した。
なお、バインダー樹脂の重量平均分子量は、ゲルパーミエーションクロマトグラフィー（ＧＰＣ）法（ポリスチレン換算）により測定して得られた値である。 [Examples and Comparative Examples]
<Preparation of binder resin>
Binder resin production example Ethyl acetate was charged into a four-necked flask equipped with a stirrer, a cooling tube, and a nitrogen gas introduction tube, heated to 75 ° C., and introduced with nitrogen gas. Then, a mixture of ditertiary butyl peroxide as an initiator was dropped over 1.5 hours, and further copolymerized for 2 hours while maintaining the same temperature, and then the solvent was distilled off under reduced pressure to obtain binder resins A and B. , C, D, E were obtained.
The binder resin E had a high content of divinylbenzene, and the crosslink density between the resins was increased and gelled. Therefore, it was determined that the molecular weight measurement was impossible and the binder resin E could not be used.
In addition, the weight average molecular weight of binder resin is the value obtained by measuring by the gel permeation chromatography (GPC) method (polystyrene conversion).