Films, preimpregnated tapes and composites made from polyimide “Salt-like” Solutions
    7.
    发明授权
    Films, preimpregnated tapes and composites made from polyimide “Salt-like” Solutions 失效
    薄膜,预浸胶带和由聚酰亚胺“盐状”制成的复合材料

    公开(公告)号:US06222007B1

    公开(公告)日:2001-04-24

    申请号:US09093826

    申请日:1998-05-29

    IPC分类号: C08G7310

    摘要: High quality films, preimpregnated tape (prepegs) and composites have been fabricated from polyimide precursor “salt-like” solutions. These “salt-like” solutions have a low viscosity (5,000 to 10,000 cp) and a high solids content (50-65% by weight) and can be coated onto reinforcing fiber to produce prepegs with excellent tack and drape at 12-15% residual solvent (˜4-6% water from thermal imidization reaction). The processing of these types of prepegs significantly overcomes solvent removal problems and allows excellent fiber wet out. In addition, the physical characteristics of the polyimide precursor “salt-like” solutions permits processing into high-performance materials through the use of standard prepregging and composite fabrication equipment. The resultant composites are of high quality.

    摘要翻译: 高质量薄膜,预浸胶带(prepegs)和复合材料已经由聚酰亚胺前体“盐状”溶液制成。 这些“盐状”溶液具有低粘度(5,000至10,000cp)和高固体含量(50-65%重量),并且可以涂覆到增强纤维上以制备具有优异的粘性和悬垂性的预浸料,其具有12-15% 残余溶剂(约为4-6%的水从热亚胺化反应)。 这些类型的预处理剂的加工显着地克服了溶剂去除问题,并且可以优异的纤维润湿。 此外,聚酰亚胺前体“盐状”溶液的物理特性允许通过使用标准预浸料和复合制造设备将其加工成高性能材料。 所得复合材料质量高。