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    Low dielectric polyimides
    2.
    发明授权
    Low dielectric polyimides 失效
    低介电聚酰亚胺

    公开(公告)号：US5428102A

    公开(公告)日：1995-06-27

    申请号：US237712

    申请日：1994-05-02

    申请人： Anne K. St. Clair ,  Terry L. St. Clair ,  William P. Winfree

    发明人： Anne K. St. Clair ,  Terry L. St. Clair ,  William P. Winfree

    IPC分类号： C08G73/10 ,  C08L79/08

    CPC分类号： C08G73/1007

    摘要： A series of polyimides based on the dianhydride of 1,4-bis(3,4-dicarboxyphenoxy)benzene (HQDEA) or on 2,2-bis[4(3-aminophenoxy)phenyl]hexafluoropropane (3-BDAF) are evolved from high molecular weight polyamic acid solutions yielding flexible free-standing films and coatings in the fully imidized form which have a dielectric constant in the range of 2.5 to 3.1 at 10 GHz.

    摘要翻译： 一系列基于1,4-双（3,4-二羧基苯氧基）苯（HQDEA）二酐或2,2-双[4-（3-氨基苯氧基）苯基]六氟丙烷（3-BDAF）的二酰亚胺衍生自 高分子量聚酰胺酸溶液产生柔性自立膜和完全酰亚胺化形式的涂层，其在10GHz下的介电常数范围为2.5至3.1。

    Structures from low dielectric polyimides
    3.
    发明授权
    Structures from low dielectric polyimides 失效
    低介电聚酰亚胺的结构

    公开(公告)号：US5338826A

    公开(公告)日：1994-08-16

    申请号：US954108

    申请日：1992-09-28

    申请人： Anne K. St. Clair ,  Terry L. St. Clair ,  William P. Winfree

    发明人： Anne K. St. Clair ,  Terry L. St. Clair ,  William P. Winfree

    IPC分类号： C08G73/10 ,  B05D5/06 ,  B32B27/00

    CPC分类号： C08G73/1007 ,  Y10T428/31681 ,  Y10T428/31721

    摘要： A structure which is effective as an electrical insulator or as a transmitter-receiver of electromagnetic energy is prepared by providing a suitable substrate and covering the substrate with an adhering layer of a low dielectric, high temperature, linear aromatic polyimide. This polyimide is prepared by:(1) selecting aromatic diamine and aromatic dianhydride reactants to meet at least two of the following three conditions:(a) a reactant must have minimal permanent or inducible electrical dipolar characteristics as a result of the presence of pendant or bridging groups therein;(b) a reactant must impart a high degree of free volume to the polymer caused by inefficient chain packing therein in the solid state as a result of the presence of pendant or bridging groups therein; and(c) a reactant must have fluorine atoms chemically attached thereto; and(2) chemically combining equimolar quantities of the aromatic diamine and aromatic dianhydride reactants in a solvent to form a high molecular weight polyamic acid solution, and converting the high molecular weight polyamic acid to the corresponding low dielectric, high temperature linear aromatic polyimide.

    摘要翻译： 作为电绝缘体或作为电磁能的发射器 - 接收器有效的结构通过提供合适的衬底并用低电介质，高温线性芳族聚酰亚胺的粘附层覆盖衬底来制备。 该聚酰亚胺通过以下方法制备：（1）选择芳族二胺和芳族二酐反应物以满足以下三个条件中的至少两个：（a）反应物必须具有最小的永久或可诱导的电偶极特性，这是由于存在侧基或 桥接基团; （b）由于在其中存在侧基或桥连基团，反应物必须赋予聚合物在固态中由于无效的链填料而导致的高度的自由体积; 和（c）反应物必须具有化学连接的氟原子; 和（2）将等摩尔量的芳族二胺和芳族二酐反应物在溶剂中化学组合以形成高分子量聚酰胺酸溶液，并将高分子量聚酰胺酸转化为相应的低电介质，高温线性芳族聚酰亚胺。

    Elastomer toughened polyimide adhesives
    6.
    发明授权
    Elastomer toughened polyimide adhesives 失效
    弹性体强化聚酰亚胺粘合剂

    公开(公告)号：US4497935A

    公开(公告)日：1985-02-05

    申请号：US461788

    申请日：1983-01-28

    申请人： Anne K. St. Clair ,  Terry L. St. Clair

    发明人： Anne K. St. Clair ,  Terry L. St. Clair

    IPC分类号： C08G73/10 ,  C08G73/12 ,  C08L79/08 ,  C08F283/04 ,  C08F283/12 ,  C08G77/32

    CPC分类号： C08G73/122 ,  C08G73/1003 ,  C08G73/101 ,  C08G73/1028 ,  C08L79/08

    摘要： A rubber-toughened addition-type polyimide composition having excellent high temperature bonding characteristics in the fully cured state and improved peel strength and adhesive fracture resistance physical property characteristics is disclosed. The process for making the improved adhesive involves preparing the rubber-containing amic acid prepolymer by chemically reacting an amine-terminated elastomer and an aromatic diamine with an aromatic dianhydride with which a reactive chain stopper anhydride has been mixed, and utilizing solvent or mixture of solvents for the reaction.

    摘要翻译： 公开了一种在完全固化状态下具有优异的高温粘合特性并提高剥离强度和耐粘连断裂性物理特性的橡胶增韧加成型聚酰亚胺组合物。 制造改进的粘合剂的方法包括通过使胺封端的弹性体和芳族二胺与已经混合反应性链终止酐的芳族二酐化学反应并使用溶剂或溶剂混合物来制备含橡胶的酰胺酸预聚物 为了反应。

    Process for preparing highly optically transparent/colorless aromatic polyimide film
    10.
    发明授权
    Process for preparing highly optically transparent/colorless aromatic polyimide film 失效
    高光学透明/无色芳族聚酰亚胺薄膜的制备方法

    公开(公告)号：US4603061A

    公开(公告)日：1986-07-29

    申请号：US643589

    申请日：1984-08-23

    申请人： Anne K. St. Clair ,  Terry L. St. Clair

    发明人： Anne K. St. Clair ,  Terry L. St. Clair

    IPC分类号： C08J5/18 ,  B05D5/06 ,  B32B27/00

    CPC分类号： C08J5/18 ,  C08J2379/08 ,  Y10T428/265 ,  Y10T428/31721

    摘要： An aromatic condensation polyimide film that is approximately 90% transparent at 500 nm, useful for thermal protective coatings and the like and the process for preparing same are disclosed. An essential feature of the invention for achieving maximum optical transparency films requires utilizing recrystallized and/or sublimated specific aromatic diamines and dianhydride monomers and introducing bulky electron-withdrawing groups and separator groups into the polymer molecular structure. The incorporation of bulky electron-withdrawing groups in the diamine portion of the polymer structure serves to reduce the formation of inter-chain and intra-chain charge transfer complexes which normally cause large absorptions in the UV-visible range. Incorporation of separator atoms into either the diamine or dianhydride monomers serves to reduce the amount of conjugation and inter-and intra-chain electronic interactions and thereby lessen charge transfer complex formation.

    摘要翻译： 公开了一种在500nm下约为90％透明度的用于热保护涂层等的芳族缩合聚酰亚胺膜及其制备方法。 实现最大光学透明膜的本发明的一个基本特征需要使用重结晶和/或升华的特定芳族二胺和二酐单体，并将大体积的吸电子基团和隔离剂基团引入到聚合物分子结构中。 在聚合物结构的二胺部分中引入大体积的吸电子基团用于减少通常在UV-可见光范围内引起大吸收的链间和链内电荷转移络合物的形成。 将分离器原子并入二胺或二酐单体中用于减少共轭量和链内和链内电子相互作用的量，从而减少电荷转移络合物的形成。