发明名称 |
HEAT-EXPANDABLE MICROSPHERES AND A PROCESS FOR PRODUCING THE SAME |
摘要 |
A method that produces heat-expandable microspheres includes the use of a shell of thermoplastic resin and a non-fluorine blowing agent encapsulated therein having a boiling point not higher than the softening point of the thermoplastic resin. The method includes a step of dispersing an oily mixture containing a polymerizable component, the blowing agent, and a polymerization initiator containing a peroxydicarbonate in an aqueous dispersing medium to polymerize the polymerizable component contained in the oily mixture. The resultant heat-expandable microspheres have a shell which is less apt to become thinner than its theoretical value, contain minimum amount of resin particle inside their shell, and have excellent heat-expanding performance.
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申请公布号 |
US2013030065(A1) |
申请公布日期 |
2013.01.31 |
申请号 |
US201213647773 |
申请日期 |
2012.10.09 |
申请人 |
MATSUMOTO YUSHI-SEIYAKU CO., LTD.;MATSUMOTO YUSHI-SEIYAKU CO., LTD. |
发明人 |
MASUDA TOSHIAKI;KITANO KENICHI;MIKI KATSUSHI;INOHARA TAKESHI;AOKI TAKAYUKI |
分类号 |
C08L33/20 |
主分类号 |
C08L33/20 |
代理机构 |
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地址 |
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