| 发明名称 |
HEAT-EXPANDABLE MICROSPHERES, PROCESS FOR PRODUCING THE SAME, AND APPLICATION THEREOF |
| 摘要 |
Heat-expandable microspheres composed of a thermoplastic resin shell and a thermally-vaporizable blowing agent encapsulated therein, and having an average particle size ranging from 1 to 100 μm. The amount of DMF-insoluble matter (G1) and the amount of DMF-MEK-insoluble matter (G2) constituting the heat-expandable microspheres satisfy 1.05<G2/G1. The expansion of the heat-expandable microspheres satisfy Hmax/Tmax≧13 (μm/° C.) where Hmax and Tmax are as defined herein. Also disclosed in a process for producing the heat-expandable microspheres which includes preparing an aqueous suspension comprising oily globules dispersed in an aqueous dispersion medium containing a hydrophilic cross-linking agent, wherein the oily globules are made of an oily mixture comprising the blowing agent and a monomer component; and polymerizing the monomer component. |
| 申请公布号 |
US2016237234(A1) |
申请公布日期 |
2016.08.18 |
| 申请号 |
US201415028133 |
申请日期 |
2014.10.02 |
| 申请人 |
MATSUMOTO YUSHI-SEIYAKU CO., LTD. |
发明人 |
TAYAGAKI Naoya;MIKI Katsushi |
| 分类号 |
C08J9/20;C08J9/228 |
主分类号 |
C08J9/20 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. Heat-expandable microspheres comprising a thermoplastic resin shell and a thermally-vaporizable blowing agent encapsulated therein, and having an average particle size ranging from 1 to 100 μm;
wherein an amount of DMF-insoluble matter (G1) and an amount of DMF-MEK-insoluble matter (G2) constituting the heat-expandable microspheres satisfy the expression 1.05<G2/G1. |
| 地址 |
Yao-shi, Osaka JP |
