反应详情

1,422 parts of stearic acid is added to 10,000 parts of ethanol, and mixed together at 75° C. 507 parts of zinc hydroxide is gradually added to the mixture, and is mixed for one hour after completion of the addition. The resultant mixture is cooled to 20° C., and the reaction product is filtered to remove reaction residue and ethanol. The obtained reaction solid product is dried at 150° C. for 3 hours using a heating vacuum drier. The dried product is taken out from the drier, and is allowed to stand for cooling, as a result of which a solid product of zinc stearate is obtained. After the obtained solid product is milled using a jet mill, the milled product is classified using an ELBOW-JET CLASSIFIER (available from Matsubo Corporation), whereby powdery zinc stearate particles 1 having a volume average particle diameter of 9.6 μm are obtained. The classification cut points when the particles are classified using Elbow-jet classifier are shown in Table 1. The particle size distribution (the ratio of particles having a particle diameter of 25 μm or more, and the ratio of particles having a particle diameter of 40 μm or more) of the obtained zinc stearate particles 1 is shown in Table 1.

1. additionmixed together at 75° C
2. additionis mixed for one hour
3. additionafter completion of the addition
4. filtrationthe reaction product is filtered
5. customto remove
6. customreaction residue and ethanol
7. customThe obtained reaction solid product
8. customis dried at 150° C. for 3 hours
9. temperaturefor cooling