Methylenediphenyl 4 4 diisocyanate

Example 1

Into a three-neck flask provided with a condenser and a stirrer, 12.51 g of 4,4′-diaminodiphenylmethane (manufactured by Tokyo Chemical Industry Co., Ltd.) and 112.59 g of N-methylpyrrolidone (manufactured by Kanto Chemical Co., Inc.) were put, and by being stirred under ice-cooling to obtain a uniform solution. Next, into a dropping funnel, 5.95 g of methylenediphenyl 4,4′-diisocyanate (manufactured by Tokyo Chemical Industry Co., Ltd.) and 53.5 g of N-methylpyrrolidone (manufactured by Kanto Chemical Co., Inc.) were put, followed by dissolving, and the resulting solution was added dropwise to the reaction solution over a period of 1 hour. The resulting product was stirred at 0° C. to 10° C. for 1 hour, and allowed to react at room temperature for 2 hours. The reaction solution was added dropwise to a mixed solution of 0.5 L of pure water and 0.5 L of methanol, and as a result, a polymer was precipitated. This was collected by filtration, washed, and dried, whereby 14.8 g of a binder polymer (CP-1) having a weight-average molecular weight of 76,000 was obtained. It was confirmed from the NMR spectrum, the IR spectrum, and GPC (polystyrene conversion) that the obtained product was the target substance.

Example 1

Into a three-neck flask provided with a condenser and a stirrer, 12.51 g of 4,4′-diaminodiphenylmethane (manufactured by Tokyo Chemical Industry Co., Ltd.) and 112.59 g of N-methylpyrrolidone (manufactured by Kanto Chemical Co., Inc.) were put, and by being stirred under ice-cooling, the solution became homogeneous. Next, into a dropping funnel, 5.95 g of methylenediphenyl 4,4′-diisocyanate (manufactured by Tokyo Chemical Industry Co., Ltd.) and 53.5 g of N-methylpyrrolidone (manufactured by Kanto Chemical Co., Inc.) were put, followed by dissolving, and the resulting solution was added dropwise to the reaction solution over a period of 1 hour. The resulting product was stirred at 0° C. to 10° C. for 1 hour, and allowed to react at room temperature for 2 hours. The reaction solution was added dropwise to a mixed solution of 0.5 L of pure water and 0.5 L of methanol, and as a result, a polymer was precipitated. This was collected by filtration, washed, and dried, whereby 14.8 g of a binder polymer (CP-1) having an average molecular weight of 76,000 was obtained. It was confirmed from the NMR spectrum, the IR spectrum, and GPC (polystyrene conversion) that the obtained product was the target substance.

Example 1

Into a three-neck flask provided with a condenser and a stirrer, 12.51 g of 4,4′-diaminodiphenylmethane (manufactured by Tokyo Chemical Industry Co., Ltd.) and 112.59 g of N-methylpyrrolidone (manufactured by Kanto Chemical Co., Inc.) were put, and by being stirred under ice-cooling, the solution became homogeneous. Next, into a dropping funnel, 5.95 g of methylenediphenyl 4,4′-diisocyanate (manufactured by Tokyo Chemical Industry Co., Ltd.) and 53.5 g of N-methylpyrrolidone (manufactured by Kanto Chemical Co., Inc.) were put, followed by dissolving, and the resulting solution was added dropwise to the reaction solution over a period of 1 hour. The resulting product was stirred at 0° C. to 10° C. for 1 hour, and allowed to react at room temperature for 2 hours. The reaction solution was added dropwise to a mixed solution of 0.5 L of pure water and 0.5 L of methanol, and as a result, a polymer was precipitated. This was collected by filtration, washed, and dried, whereby 14.8 g of a binder polymer (CP-1) having a weight average molecular weight of 76,000 was obtained. It was confirmed from the NMR spectrum, the IR spectrum, and GPC (polystyrene conversion) that the obtained product was the target substance.