| 摘要 |
The present invention relates to thermally expandable thermoplastic microspheres comprising a polymer shell made from ethylenically unsaturated monomers encapsulating a propellant, said ethylenically unsaturated monomers comprising from 21 to 80 wt% of methacrylamide and from 20 to 70 wt% methacrylonitrile, the total amount of methacrylamide and methacrylonitrile being from 70 to 100 wt% of the ethylenically unsaturated monomers. Furthermore, the invention relates to production and use of such microspheres. |
