Curing agent for polyepoxides and epoxy resins and composites cured
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    1.
    发明授权
    Curing agent for polyepoxides and epoxy resins and composites cured therewith 失效
    用于聚环氧化物和环氧树脂的固化剂以及用其固化的复合材料

    公开(公告)号:US4244857A

    公开(公告)日:1981-01-13

    申请号:US70771

    申请日:1979-08-30

    摘要: A curing agent for a polyepoxide has the formula: ##STR1## wherein R.sub.1 is a divalent aryl radical such as phenylene and wherein R.sub.2 is a tetravalent aryl radical such as a tetravalent benzene radical. An epoxide is cured by admixture with the curing agent. The cured epoxy product retains the usual properties of cured epoxides and, in addition, has a high char residue after burning, on the order of 45% by weight. The high char residue is of value in preventing release to the atmosphere of carbon fibers from carbon fiber-epoxy resin composites in the event of burning of the composite.

    摘要翻译: 聚环氧化物的固化剂具有下式:其中R 1是二价芳基如亚苯基,其中R 2是四价芳基如四价苯基。 环氧化物与固化剂混合固化。 固化的环氧树脂产品保留了固化的环氧化物的通常性质,此外,燃烧后具有高焦炭残留量,约为45重量%。 在燃烧复合材料的情况下,高焦炭残留物在防止碳纤维环氧树脂复合材料的碳纤维气氛中的释放是有价值的。

    Composition and method for making polyimide resin-reinforced fabric
    2.
    发明授权
    Composition and method for making polyimide resin-reinforced fabric 失效
    制造聚酰亚胺树脂增强织物的组合物和方法

    公开(公告)号:US4244853A

    公开(公告)日:1981-01-13

    申请号:US27557

    申请日:1979-04-06

    摘要: A composition for making polyimide resin-reinforced fibers or fabric. The composition is of the type disclosed in U.S. Pat. No. 3,745,149 and includes a polyfunctional ester, a polyfunctional amine, and an end-capping agent. The composition is impregnated into fibers or fabric and heated to form prepreg material. The tack retention characteristics of this prepreg material are improved by incorporating into the composition a liquid olefinic material compatible with the other ingredients of the composition. The prepreg material is heated at a higher temperature to effect formation of the polyimide resin and the monomeric additive is incorporated in the polyimide polymer structure.

    摘要翻译: 用于制造聚酰亚胺树脂增强纤维或织物的组合物。 该组合物是在美国专利No. 包括多官能酯,多官能胺和封端剂。 将组合物浸渍到纤维或织物中并加热以形成预浸料材料。 通过在组合物中加入与组合物的其它成分相容的液体烯烃材料,可改进该预浸料坯材的粘着保持性能。 将预浸料材料在较高温度下加热以形成聚酰亚胺树脂,并将单体添加剂加入到聚酰亚胺聚合物结构中。