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    • 2. 发明授权
    • Selective laser sintering with composite plastic material
    • 选择性激光烧结与复合塑料材料
    • US5733497A
    • 1998-03-31
    • US527840
    • 1995-09-13
    • Kevin P. McAleaPaul F. ForderhaseMark E. GanningerFrederic W. KunigAngelo J. Magistro
    • Kevin P. McAleaPaul F. ForderhaseMark E. GanningerFrederic W. KunigAngelo J. Magistro
    • C08J9/24B29C39/00B29C41/00B29C67/00B29C67/20B29K105/04C08J9/32C08K7/20C08L77/00C08L101/00B29C35/08B29C41/02
    • C08K7/20B29C39/003B29C41/003B29C67/0077
    • A composite powder specially adapted for use in selective laser sintering is disclosed. The composite powder includes a polymer powder dry mixed with a reinforcement powder, where the polymer powder has a melting temperature substantially lower than that of the reinforcement powder. In the case where nearfully dense parts are to be formed, the first constituent powder is preferably a semi-crystalline powder, for example nylon 11, of a composition suitable for forming near-fully dense parts when used unblended in selective laser sintering; if porous parts are desired, the polymer powder is an amorphous powder, such as polycarbonate, polystyrene, acrylates, and styrene/acrylate copolymers. The reinforcement powder is preferably microspheres of glass, preferably coated to enhance wetting and adhesion with the polymer powder when selective laser sintering is performed. Besides improving the stiffness and heat resistance of the part produced, the composite powder widens the process window over that provided by unblended powder, provides improved dimensional accuracy in the part produced, and facilitates roughbreakout and smooth finishing of the part produced.
    • 公开了一种特别适用于选择性激光烧结的复合粉末。 复合粉末包括与增强粉末混合的聚合物粉末,其中聚合物粉末的熔融温度基本上低于加强粉末的熔融温度。 在要形成接近密集部分的情况下,第一组分粉末优选为半结晶粉末,例如尼龙11,适合于在选择性激光烧结中未掺杂时形成近乎致密部分的组合物; 如果需要多孔部分,聚合物粉末是无定形粉末,例如聚碳酸酯,聚苯乙烯,丙烯酸酯和苯乙烯/丙烯酸酯共聚物。 增强粉末优选是玻璃微球体,优选涂覆以在选择性激光烧结时增强与聚合物粉末的润湿性和粘合性。 除了提高所生产部件的刚度和耐热性之外,复合材料粉末使工艺窗口比非混合粉末提高了加工窗口的尺寸,提高了产品尺寸精度,并促进了生产部件的破裂和光滑整理。
    • 8. 发明授权
    • Copper-catalyzed fluid-bed ethylene oxhydrochlorination process
    • 铜催化流化床乙烯氯化氢过程
    • US4339620A
    • 1982-07-13
    • US239806
    • 1981-03-02
    • Joseph A. CowferJamal S. EdenAngelo J. Magistro
    • Joseph A. CowferJamal S. EdenAngelo J. Magistro
    • B01J23/72C07C17/156C07C17/15
    • B01J23/72C07C17/156
    • There is disclosed a method and composition for improving the fluidization characteristics and alleviating or inhibiting stickiness in a supported cupric chloride catalyst used as fluid bed catalyst in oxyhydrochlorinations reactions. The method involves the in situ preparation of the supported cupric chloride catalyst by addition of bare support on which no cupric chloride is deposited to the supported cupric chloride catalyst in the fluidized bed, or the use in the bed as the initial charge or as addition to the bed as makeup, of a composition which is a mixture of supported cupric chloride catalyst and bare support. In either event, as the oxyhydrochlorination proceeds, a portion of the cupric chloride on the supported catalyst becomes released therefrom and deposited in situ on the bare support, and stickiness of the cupric chloride containing catalyst particles to one another in the fluid bed is alleviated or inhibited.
    • 公开了一种改善流化特性并减轻或抑制用于羟基氢氯化反应中作为流化床催化剂的负载型氯化铜催化剂中的粘性的方法和组合物。 该方法包括通过添加裸式载体来原位制备负载的氯化铜催化剂,其上没有将氯化铜沉积在流化床中的负载的氯化铜催化剂上,或者在床中用作初始电荷或作为添加 作为化妆品的床,作为负载的氯化铜催化剂和裸支撑物的混合物的组合物。 在任一情况下,随着氧化氢氯化的进行,载体催化剂上的一部分氯化铜被释放出来,并在裸露的载体上原位沉积,并且在流化床中彼此含有氯化铜的催化剂颗粒的粘性得到缓解或 抑制。