Polyimide prepolymer composition from unsaturated bisimide and diamine
containing unreacted reactants
    3.
    发明授权
    Polyimide prepolymer composition from unsaturated bisimide and diamine containing unreacted reactants 失效
    不饱和双酰亚胺和含有未反应的反应物的二胺的聚酰亚胺预聚物组合物

    公开(公告)号:US4680377A

    公开(公告)日:1987-07-14

    申请号:US805989

    申请日:1985-12-05

    摘要: Superior polyimide prepolymers particularly suitable for fabrication of multi-layer printed boards are produced by reacting unsaturated bisimides with diamines to consist essentially of 41-55% of unreacted reactants, 39-54% of components having a molecular weight of between 400 and 15,000, and 3.0-6.8% of components having a molecular weight of more than 15,000. The resulting prepolymers enable the preparation of their solution having enough working life for successfully impregnating a given substrate therewith in the preparation of prepregs. The prepregs, prepared from the above prepolymers in such a way as to contain within the resin content thereof 29-35% of unreacted reactants, 51-65% of the components having a molecular weight of between 400 and 15,000, and 5-14% of the components having a molecular weight of more than 15,000, allow the fabrication of laminate products with remarkable dimension stability under a low molding pressure to eliminate the presence of voids in the products, in addition to that the prepregs ensure a high bond strength as well as elongated working life which is responsible for prevention of a blister in the finished laminate and for easy control of the laminate forming process.

    摘要翻译: 特别适用于制造多层印刷电路板的优异的聚酰亚胺预聚物是通过使不饱和双酰亚胺与二胺反应制得的,基本上由41-55%的未反应的反应物组成,39-54%的分子量为400至15,000的组分,以及 3.0-6.8%的分子量大于15,000的组分。 得到的预聚物使得它们的溶液的制备具有足够的使用寿命,用于在预浸料的制备中成功地浸渍给定的基材。 由上述预聚物制备的预浸料以含有29-35%未反应的反应物的树脂含量,51-65%的分子量为400至15,000的组分和5-14% 的分子量大于15,000的组分,允许在低成型压力下制造具有显着尺寸稳定性的层压产品,以消除产品中空隙的存在,此外,预浸料还确保了高的粘结强度 作为延长的工作寿命,其负责防止成品层压体中的起泡,并且易于控制层压体形成过程。