发明名称 |
Microcapsule containing magnetic fluid, manufacturing method, and use thereof |
摘要 |
PCT No. PCT/JP97/00646 Sec. 371 Date Sep. 11, 1998 Sec. 102(e) Date Sep. 11, 1998 PCT Filed Mar. 4, 1997 PCT Pub. No. WO97/33686 PCT Pub. Date Sep. 18, 1997Provided are microcapsules enclosing therein a magnetic fluid, which are useful for imparting sound-absorbing and insulating ability to building materials, etc. by incorporation thereinto or adhesion thereto by means of an adhesive, and processes for producing the microcapsules. The heat-expandable microcapsule of the present invention comprises (i) a shell composed of a thermoplastic resin and (ii) a magnetic fluid which is a dispersion of magnetic substance fine particles having an average particle diameter of 5-200 nm in a hydrophobic organic solvent and a hydrophobic liquid foaming agent, both enclosed in the shell. The hollow microcapsule of the present invention comprises (i) a shell composed of a thermoplastic resin, and (ii) a magnetic fluid which is a dispersion of magnetic substance fine particles having an average particle diameter of 5-200 nm in a hydrophobic organic solvent and a vacant cell both included in the shell. The coating material of the present invention comprises at least one of these sound-absorbing and insulating microcapsules.
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申请公布号 |
US6106946(A) |
申请公布日期 |
2000.08.22 |
申请号 |
US19980147017 |
申请日期 |
1998.09.11 |
申请人 |
MATSUMOTO YUSHI-SEIYAKU CO., LTD.;NITTO BOSEKI CO., LTD |
发明人 |
TANAKA, KOJI;SHIBAMOTO, TOSHIHIKO;NISHIZAKI, AKIHIKO |
分类号 |
B01J13/02;C09D5/23;H01F1/44;(IPC1-7):B01J13/02 |
主分类号 |
B01J13/02 |
代理机构 |
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