| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nano-diamond nonaqueous dispersion superior in storage properties, in which a primary particle of the nano-diamond is uniformly dispersed in a nonaqueous liquid dispersion medium. <P>SOLUTION: This preparing method comprises a step of putting a slurry liquid, which is obtained by previously mixing a cluster diamond aggregation 2 with a nonaqueous liquid medium 3 by using a homogenizer, into a premixing vessel 4, a step of conducting the slurry into a vessel 7 of a wet bead mill machine 6 by using a pump 5 and pulverizing the cluster diamond aggregation in a wet process by turning effort among a ceramic bead 8 and a rotor 9, a step of returning the slurry 10 obtained by pulverizing in the wet process into the above premixing vessel 4 via a tube 11, a step of circulating it again to the bead mill machine 6 by using the pump 5, and a step of opening a change valve 12 after termination of dispersion and conducting a prepared nano-diamond nonaqueous dispersion 14 into a product tank 13. This nano-diamond nonaqueous dispersion is useful for a modifier of lubricity, gloss and hardness of a coating. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
