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    • 73. 发明授权
    • Polybenzoxazole-filled nitrile butadiene rubber compositions
    • 聚苯并恶唑填充丁腈橡胶组合物
    • US07358314B2
    • 2008-04-15
    • US11207855
    • 2005-08-18
    • Himansu M. GajiwalaDavid G. Guillot
    • Himansu M. GajiwalaDavid G. Guillot
    • C08F36/06C08F136/04C06D5/00
    • C08L9/02C08K7/02C08L79/06C08L2666/20
    • An insulation composition that comprises at least one nitrile butadiene rubber (“NBR”) having an acrylonitrile content that ranges from approximately 26% by weight to approximately 35% by weight and polybenzoxazole (“PBO”) fibers. The NBR may be a copolymer of acrylonitrile and butadiene and may be present in the insulation composition in a range of from approximately 45% by weight to approximately 56% by weight of a total weight of the insulation composition. The PBO fibers may be present in a range of from approximately 3% by weight to approximately 10% by weight of a total weight of the insulation composition. A rocket motor including the insulation composition and a method of insulating a rocket motor are also disclosed.
    • 一种绝缘组合物,其包含至少一种丙烯腈含量为约26重量%至约35重量%的丁腈橡胶(“NBR”)和聚苯并恶唑(“PBO”)纤维。 NBR可以是丙烯腈和丁二烯的共聚物,并且可以以绝热组合物的总重量的约45重量%至约56重量%的范围存在于绝缘组合物中。 PBO纤维可以以绝热组合物的总重量的约3重量%至约10重量%的范围存在。 还公开了包括绝缘组合物的火箭发动机和绝热火箭发动机的方法。
    • 75. 发明授权
    • Method for producing modified conjugated diene polymer and rubber composition
    • 改性共轭二烯聚合物和橡胶组合物的制备方法
    • US07202306B2
    • 2007-04-10
    • US10849786
    • 2004-05-21
    • Ryouji TanakaTakuo SoneToshihiro Tadaki
    • Ryouji TanakaTakuo SoneToshihiro Tadaki
    • C08F36/06C08C19/25
    • C08L19/006C08C19/25C08C19/34C08C19/42C08L21/00C08L2666/08
    • Disclosed are a method for producing a modified conjugated diene polymer improved in quality stability, more enhanced in low heat buildup and reinforcing ability when used in a rubber composition, excellent in wear resistance, mechanical characteristics and processability, and improved in cold flow; and a rubber composition using the same. The method includes a step of modifying an active end of an active end-containing conjugated diene polymer having a cis-1,4-bond content of 75% or more with an alkoxysilane compound containing at least one functional group selected from the group consisting of (a) an epoxy group, (b) an isocyanate group and (c) a carboxyl group, and a step of adding a condensation accelerator to conduct condensation reaction of the alkoxysilane compound (residue) in an aqueous solution having a pH of 9 to 14 and a temperature of 85 to 180° C.
    • 公开了一种制备改性共轭二烯聚合物的方法,该改性共轭二烯聚合物在橡胶组合物中使用时质量稳定性提高,低发热性和增强能力提高,耐磨性,机械特性和加工性优异,冷流改善; 和使用其的橡胶组合物。 该方法包括使含有至少一个选自以下的官能团的烷氧基硅烷化合物改性具有75%以上的顺式-1,4-键含量的含活性端的共轭二烯聚合物的活性末端的步骤: (a)环氧基,(b)异氰酸酯基和(c)羧基,以及加入缩合促进剂以使烷氧基硅烷化合物(残基)在pH为9的水溶液中进行缩合反应的步骤, 14℃,温度为85〜180℃。