Organic microballoon
    23.
    发明授权
    Organic microballoon 失效
    有机微球

    公开(公告)号:US4582756A

    公开(公告)日:1986-04-15

    申请号:US630125

    申请日:1984-07-12

    摘要: Inorganic fillers such as silica balloons are used as a lightweight filler for resin moldings. But the specific gravity of these inorganic fillers is about 0.2 at most, so that there is a limit to reduction in weight. The foamed product of organic polymers is obtained as a lightweight substance, but it is hardly put to practical use because of its poor solvent resistance and thermal resistance.The microballoon of the present invention is produced by coating the surface of a hollow particle having the wall film of a thermoplastic high polymer with a thermosetting resin.The present invention provides a microballoon having excellent solvent resistance and thermal resistance as well as a very low specific gravity, and said microballoon is useful as a lightweight filler for resin moldings, aggregate for FRP, ingredient for paints, and the like.

    摘要翻译: 无机填料如二氧化硅气球用作树脂模制品的轻质填料。 但是,这些无机填料的比重最多为0.2左右,因此重量减少是有限度的。 获得有机聚合物的发泡产物作为轻质物质,但由于其耐溶剂性和耐热性差,所以难以实际应用。 本发明的微球通过用热固性树脂涂布具有热塑性高分子聚合物的壁的中空颗粒的表面来制造。 本发明提供了具有优异的耐溶剂性和耐热性以及非常低的比重的微球,并且所述微球可用作树脂模制品的轻质填料,FRP用聚集体,油漆成分等。

    Heat-expandable microspheres and application thereof

    公开(公告)号:US10941267B2

    公开(公告)日:2021-03-09

    申请号:US15575125

    申请日:2016-05-18

    摘要: Heat-expandable microspheres and applications thereof, the heat-expandable microspheres including a thermoplastic resin shell and a thermally-vaporizable blowing agent encapsulated therein. The thermoplastic resin is produced by polymerizing a polymerizable component containing (A) a nitrile monomer including methacrylonitrile, (B) a carboxyl-group-containing monomer and (C) a monomer having a functional group reactive with the carboxyl group. The polymerizable component satisfies the following conditions 1 and 2:
    Condition 1: The weight fraction of the monomers (A), (B) and (C) in the polymerizable component satisfy the inequality shown below. Weight fraction of the monomer (C)

    HOLLOW RESIN PARTICLES AND APPLICATION THEREOF

    公开(公告)号:US20190194415A1

    公开(公告)日:2019-06-27

    申请号:US16322218

    申请日:2017-07-07

    摘要: Hollow resin particles, a production process for producing the same and application thereof. The hollow resin particles include a thermoplastic resin shell and a hollow part surrounded by the shell. The thermoplastic resin is a polymer produced from a polymerizable component containing 0.6 to 3.0 wt % of a crosslinkable monomer having at least two polymerizable carbon-carbon double bonds per molecule and 97 to 99.4 wt % of an uncrosslinkable monomer having one polymerizable carbon-carbon double bond per molecule. A blowing agent is encapsulated in the hollow resin particles. The blowing agent contains 50 to 100 wt % of an organic compound having a vapor pressure higher than 100 kPa at 25° C. Further, the encapsulation ratio of the blowing agent ranges from 3 to 13 wt % of the hollow resin particles.