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    • 62. 发明授权
    • Polymerizing bis-maleimides
    • 聚合双马来酰亚胺
    • US4118377A
    • 1978-10-03
    • US497490
    • 1974-08-14
    • Gaetano F. D'Alelio
    • Gaetano F. D'Alelio
    • C08F4/00C08F4/06C08F20/00C08F22/36C08F290/00C08F299/00C08G73/12
    • C08G73/126C08G73/12C08G73/125C08G73/127
    • Processes for increasing the molecular weight of bis-maleimides are provided. The bis-maleimides are reacted with certain cyclic dienes to form reversible adducts. These adducts, upon elimination of the cyclic diene, yield an extension of the bis-maleimides to higher molecular weight polymers, ultimately to thermally stable, infusible polymers. The process can be interrupted to yield tractable polymers which are also convertible to cross-linked, infusible products. Modifications of the process include preparing the adducts in the presence of aprotic solvents as well as Bronsted acid salt catalysts, and the isolation of intermediate solid products.
    • 提供了增加双马来酰亚胺的分子量的方法。 双马来酰亚胺与某些环状二烯反应形成可逆的加合物。 这些加合物在消除环状二烯时,产生双 - 马来酰亚胺向较高分子量聚合物的延伸,最终导致热稳定的,不熔的聚合物。 可以中断该方法以产生可转化成交联的,不可渗透的产品的可处理的聚合物。 该方法的修改包括在非质子溶剂以及布朗斯台德酸盐催化剂存在下制备加合物,以及分离中间固体产物。
    • 68. 发明授权
    • Polyimide oligomers
    • 聚酰亚胺低聚物
    • US08901274B2
    • 2014-12-02
    • US13573141
    • 2012-08-24
    • Sajal DasVilas M. ChopdekarMegan B. Casey
    • Sajal DasVilas M. ChopdekarMegan B. Casey
    • C08G69/26
    • C08G73/1067C08G73/126C08G73/127
    • Polyimide oligomers of the general formula: M-(Z—Y—X—Y—Z)n-M wherein n is an integer of 1 to 20; X comprises an aromatic diamine containing 2-4 aryl moieties, each of which contains 0-4 substituents; Z is independently the same as X or is a different aromatic diamine containing 1-4 aryl moieties, each of which contains 0-4 substituents; Y comprises an aromatic dianhydride containing 1-4 aryl moieties, each of which contains 0-4 substituents; and M is independently the same as Y or is a substituted or unsubstituted anhydride, a substituted or unsubstituted dianhydride, a substituted or unsubstituted bisimide, or a substituted or unsubstituted monomeric or oligomeric phthalonitrile.
    • 具有通式M-(Z-Y-X-Y-Z)n-M的聚酰亚胺低聚物,其中n为1-20的整数; X包含含有2-4个芳基部分的芳族二胺,每个芳基部分含有0-4个取代基; Z独立地与X相同,或者是含有1-4个芳基部分的不同芳族二胺,每个芳基部分含有0-4个取代基; Y包含含有1-4个芳基部分的芳族二酐,每个芳基部分含有0-4个取代基; 和M独立地与Y相同或为取代或未取代的酸酐,取代或未取代的二酐,取代或未取代的双酰亚胺,或取代或未取代的单体或低聚邻苯二甲腈。
    • 69. 发明授权
    • Friction material and resin composition for friction material
    • 用于摩擦材料的摩擦材料和树脂组合物
    • US08748509B2
    • 2014-06-10
    • US12935702
    • 2009-03-27
    • Hideki OzawaMitsushi Taguchi
    • Hideki OzawaMitsushi Taguchi
    • C08J5/14
    • F16D69/026C08G73/1007C08G73/101C08G73/1014C08G73/1067C08G73/121C08G73/122C08G73/126C08L79/085F16D69/025
    • A friction material characterized by using a resin composition for friction materials, the resin composition containing, as a binder, an aromatic imide oligomer having an addition-reactive group at an end thereof. Also described is a resin composition for friction materials, containing: a powder of an aromatic imide oligomer having an addition-reactive group at an end thereof; at least one type of fiber selected from the group consisting of carbon fiber, aramid fiber, glass fiber, ceramic fiber, and metal fiber; and an inorganic filler. The friction material and a resin composition for friction materials have good formability and in which the binder itself has excellent heat resistance and mechanical properties, compared to a friction material using a phenolic resin as a binder.
    • 一种摩擦材料,其特征在于使用摩擦材料用树脂组合物,所述树脂组合物在其末端含有作为粘结剂的具有加成反应性基团的芳香族酰亚胺低聚物。 还描述了一种用于摩擦材料的树脂组合物,其包含:末端具有加成反应性基团的芳族酰亚胺低聚物的粉末; 选自碳纤维,芳族聚酰胺纤维,玻璃纤维,陶瓷纤维和金属纤维中的至少一种纤维; 和无机填料。 与使用酚醛树脂作为粘合剂的摩擦材料相比,摩擦材料和用于摩擦材料的树脂组合物具有良好的成形性,并且粘合剂本身具有优异的耐热性和机械性能。