| 摘要 |
PROBLEM TO BE SOLVED: To make excellent in storage stability in a closed container by simultaneously adding fine powder to solid amine powder, mixing and pulverizing so as to attain a specific value in the center particle size of the solid amine, while the solid amine is pulverized to make it to a specific value in the center particle size, and making the fine powder stuck on the solid amine surface. SOLUTION: The fine powder having <2μm center particle size is stuck on the surface of the solid amine having >50 deg.C melting point and <20μm center particle size, such that a weight ratio of the solid amine to the fine powder becomes 1/0.001-0.5, then the active amino groups on the surface are covered. Here, while the solid amine is pulverized to <20μm center particle size, the amine is simultaneously mixed with the fine powder, and pulverized to become <2μm center particle size, and the fine powder is stuck to the solid amine surface. Also, the solid amine preliminarily pulverized to <20μm center particle size together with the fine powder at <2μm center particle size is stuck on the solid amine surface by using a high speed impact mixing agitator, a compression shearing mix agitator or a spray dryer.
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