-
1.
公开(公告)号:US5462704A
公开(公告)日:1995-10-31
申请号:US233455
申请日:1994-04-26
申请人: Jui-Hsiang Chen , Jeng Wei , Andrew T. Hu , Yu-Der Lee , Ru-Fong Laiw , Muh-Lan Chen , Chung-Yi Chang , Fan-Yen Lee , Shu-Fang Jiang
发明人: Jui-Hsiang Chen , Jeng Wei , Andrew T. Hu , Yu-Der Lee , Ru-Fong Laiw , Muh-Lan Chen , Chung-Yi Chang , Fan-Yen Lee , Shu-Fang Jiang
CPC分类号: C08J9/28 , A61L27/18 , C08J2375/04
摘要: A porous polyurethane tube suitable for use as a vascular graft prosthesis is prepared by placing solvent type polyurethane resin coated mandrel in a static coagulant consisting of water, ethanol and optionally aprotic solvent within 30 seconds immediately after the coating step, separating the tube by placing the mandrel in a swelling agent containing at least 90 percent by weight of ethanol and rinsing with a solution containing at least 80 percent by weight ethanol.
摘要翻译: 适合用作血管移植假体的多孔聚氨酯管通过将溶剂型聚氨酯树脂涂布的心轴放置在由水,乙醇和任选的非质子溶剂组成的静态凝结剂中,立即在涂布步骤之后立即在30秒内将其放置 在包含至少90重量%乙醇的溶胀剂中的心轴,并用含有至少80重量%乙醇的溶液冲洗。
-
公开(公告)号:US5424388A
公开(公告)日:1995-06-13
申请号:US56670
申请日:1993-06-24
申请人: Jui-Hsiang Chen , Hung-Chou Kang , Chin-Jiuh Kang , Yuan-Der Wu , Ru-Fong Laiw
发明人: Jui-Hsiang Chen , Hung-Chou Kang , Chin-Jiuh Kang , Yuan-Der Wu , Ru-Fong Laiw
CPC分类号: C08G69/16 , B29C70/521 , C08G69/18 , B29C67/246 , B29K2077/00 , B29K2277/00 , Y10S264/56
摘要: A pultrusion processing method for long fiber-reinforced nylon which combines the nylon anionic ring-opening polymerization technology and the pultrusion processing method to manufacture long fiber-reinforced thermoplastic nylon composites. The method comprises the steps of forming an active caprolactam sodium salt catalyst composition by reacting melt nylon 6 monomer raw material, i.e., caprolactum, with sodium hydride, forming co-catalyst composition by melting caprolactam and a polymeric co-catalyst, then mixing the active caprolactum sodium salt catalyst composition and the co-catalyst composition in a continuous mixing device to obtain a reaction mixture with low viscosity. The mixture is then charged into a closed impregnating tank to impregnate preheated and dried reinforced fiber, which is immediately pulled into a hot mold for composite molding processing to form a finished product of long fiber-reinforced nylon composites.
摘要翻译: 用于长纤维增强尼龙的拉挤成型加工方法,其结合了尼龙阴离子开环聚合技术和拉挤加工方法来制造长纤维增强热塑性尼龙复合材料。 该方法包括以下步骤:通过使熔融尼龙6单体原料即己内酰胺与氢化钠反应形成活性己内酰胺钠盐催化剂组合物,通过熔融己内酰胺和聚合物助催化剂形成助催化剂组合物,然后混合活性 己内酰胺钠盐催化剂组合物和助催化剂组合物在连续混合装置中获得低粘度的反应混合物。 然后将混合物装入封闭的浸渍槽中,以浸渍预热和干燥的增强纤维,其被立即拉入热模以进行复合模塑加工以形成长纤维增强尼龙复合材料的成品。
-