Polyimide processing additives
    1.
    发明授权
    Polyimide processing additives 失效
    聚酰亚胺加工助剂

    公开(公告)号:US5272248A

    公开(公告)日:1993-12-21

    申请号:US892058

    申请日:1992-05-22

    摘要: A process for preparing polyamides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.

    摘要翻译: 描述了一种制备具有增强的熔体流动性能的聚酰胺的方法。 该方法包括将高分子量聚(酰胺酸)或聚酰亚胺与低分子量酰胺酸添加剂的混合物加入0.05至15重量%的添加剂。 如此获得的聚酰亚胺粉末显示出改进的加工性能,如通过毛细管流变测定法的较低熔体粘度所证明的。 同样,由聚合物与添加剂的混合物制备的薄膜也显示改善的加工性能,并且通过TMA早期开始拉伸。

    Polyimide processing additives
    2.
    发明授权
    Polyimide processing additives 失效
    聚酰亚胺加工助剂

    公开(公告)号:US5116939A

    公开(公告)日:1992-05-26

    申请号:US84064

    申请日:1987-08-11

    IPC分类号: C08G73/10 C08K5/21 C08K5/3415

    摘要: A process for preparing polyimides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.

    摘要翻译: 描述了制备具有增强的熔体流动性能的聚酰亚胺的方法。 该方法包括将高分子量聚(酰胺酸)或聚酰亚胺与低分子量酰胺酸添加剂的混合物加入0.05至15重量%的添加剂。 如此获得的聚酰亚胺粉末显示出改进的加工性能,如通过毛细管流变测定法的较低熔体粘度所证明的。 同样,由聚合物与添加剂的混合物制备的薄膜也显示改善的加工性能,并且通过TMA早期开始拉伸。

    Reflective silvered polyimide films via in situ thermal reduction silver
(I) complexes
    4.
    发明授权
    Reflective silvered polyimide films via in situ thermal reduction silver (I) complexes 失效
    反射镀银聚酰亚胺膜通过原位热还原银(I)配合物

    公开(公告)号:US6019926A

    公开(公告)日:2000-02-01

    申请号:US26591

    申请日:1998-02-20

    IPC分类号: B29C41/24 B29D11/00

    摘要: Self-metallizing, flexible polyimide films with highly reflective surfaces are prepared by an in situ self-metallization procedure involving thermally initiated reduction of polymer-soluble silver(I) complexes. Polyamic acid solutions are doped with silver(I) acetate and solubilizing agents. Thermally curing the silver(I)-doped resins leads to flexible, metallized films which have reflectivities as high as 100%, abrasion-resistant surfaces, thermal stability and, in some cases, electrical conductivity, rendering them useful for space applications.

    摘要翻译: 具有高反射表面的自金属化柔性聚酰亚胺膜通过原位自金属化方法制备,其涉及聚合物可溶性银(I)络合物的热引发还原。 聚酰胺酸溶液用乙酸银(I)和增溶剂掺杂。 将I(I)掺杂的树脂热固化导致柔性的金属化膜,其反射率高达100%,耐磨损表面,热稳定性,并且在某些情况下导电性可使其适用于空间应用。

    Process for preparing an assembly of an article and a polymide which
resists dimensional change, delamination and debonding when exposed to
changes in temperature
    8.
    发明授权
    Process for preparing an assembly of an article and a polymide which resists dimensional change, delamination and debonding when exposed to changes in temperature 失效
    用于制备制品和聚酰亚胺的组件的方法,其在暴露于温度变化时抵抗尺寸变化,分层和脱粘

    公开(公告)号:US5376209A

    公开(公告)日:1994-12-27

    申请号:US141430

    申请日:1993-10-20

    摘要: An assembly of an article and a polyimide composition is prepared. The assembly resists dimensional change, delamination, or debonding when exposed to changes in temperature. An article is provided. A polyamic acid solution which yields a polyimide having a low coefficient of thermal expansion (CTE) was prepared. Equimolar quantities of an aromatic diamine and an aromatic dianhydride were reacted in a solvent medium to form a polyamic acid solution. A metal ion-containing additive was added to the solution. Examples of this additive are: TbCl.sub.3, DyCl.sub.3, ErCl.sub.3, TmCl.sub.3, Al(C.sub.5 H.sub.7 O.sub.2).sub.3, and Er.sub.2 S.sub.3. The polyamic acid solution was imidized and is combined with the article to form the assembly.

    摘要翻译: 制备制品和聚酰亚胺组合物的组合物。 当暴露于温度变化时,组件抵抗尺寸变化,分层或剥离。 提供了一篇文章。 制备具有低热膨胀系数(CTE)的聚酰亚胺的聚酰胺酸溶液。 将等摩尔量的芳族二胺和芳族二酐在溶剂介质中反应形成聚酰胺酸溶液。 向溶液中加入含金属离子的添加​​剂。 该添加剂的实例是:TbCl 3,DyCl 3,ErCl 3,TmCl 3,Al(C 5 H 7 O 2)3和Er 2 S 3。 将聚酰胺酸溶液酰亚胺化并与制品组合以形成组件。