公开(公告)号：US4786687A

公开(公告)日：1988-11-22

申请号：US854327

申请日：1986-04-21

申请人： Akira Sano ,  Masataka Oka ,  Tetsujirou Kuroishi ,  Kazuo Matsuura

发明人： Akira Sano ,  Masataka Oka ,  Tetsujirou Kuroishi ,  Kazuo Matsuura

IPC分类号： C08L23/00 ,  B29C45/00 ,  B29K23/00 ,  C08F2/38 ,  C08F2/40 ,  C08F2/42 ,  C08F4/60 ,  C08F4/634 ,  C08F4/64 ,  C08F8/00 ,  C08F10/00 ,  C08F10/02 ,  C08F255/00 ,  C08F255/02 ,  C08L7/00 ,  C08L21/00 ,  C08L23/06 ,  C08L101/00 ,  C08L23/04

CPC分类号： C08F10/02 ,  Y10S526/903 ,  Y10S526/905

摘要： A molding composition is disclosed which comprises ultrahigh molecular weight polyethylene having an intrinsic viscosity of 10-30 dl/g at 135.degree. C. in decalin. Improved injection moldability is provided by the use of such polyethylene obtainable by a multi-stage polymerization reaction including at least the following two stages: (a) a first stage in which ethylene is polymerized using a specified composite catalyst in the absence of hydrogen of its presence at lower concentration to produce 50-99.5 weight parts of polyethylene having an intrinsic viscosity of 12-32 dl/g at 135.degree. C. in decalin; and (b) a second stage in which a fresh feed of ethylene is polymerized in the presence of hydrogen at higher concentration to produce 50-0.5 weight parts of polyethylene having an intrinsic viscosity of 0.1-5 dl/g at 135.degree. C. in decalin.

摘要翻译： 公开了一种模塑组合物，其包含在135℃下在十氢化萘中特性粘度为10-30dl / g的超高分子量聚乙烯。 通过使用可通过多阶段聚合反应获得的这种聚乙烯（其至少包括以下两个阶段）来提供注塑成型性：（a）在不存在氢的情况下使用特定的复合催化剂使乙烯聚合的第一阶段 在135℃下在十氢化萘中生产50-99.5重量份的特性粘度为12-32dl / g的聚乙烯; 和（b）第二阶段，其中在更高浓度的氢存在下聚合乙烯的新鲜进料以在135℃下产生特性粘度为0.1-5dl / g的50-0.5重量份的聚乙烯 十氢化萘

公开(公告)号：US4760120A

公开(公告)日：1988-07-26

申请号：US941858

申请日：1986-12-15

申请人： Akira Sano ,  Tetsujirou Kuroishi ,  Yasunosuke Miyazaki ,  Shigeki Yokoyama ,  Kazuo Matsuura

发明人： Akira Sano ,  Tetsujirou Kuroishi ,  Yasunosuke Miyazaki ,  Shigeki Yokoyama ,  Kazuo Matsuura

IPC分类号： C08L23/06 ,  C08F2/38 ,  C08F4/60 ,  C08F4/634 ,  C08F4/64 ,  C08F8/00 ,  C08F10/02 ,  C08J3/09 ,  C08J5/18 ,  C08L23/00 ,  C08L101/00 ,  D01F6/04

CPC分类号： C08F10/02 ,  Y10S526/904 ,  Y10S526/905 ,  Y10T428/2982

摘要： An ultra-high molecular weight polyethylene powder easily soluble in organic solvents and suitable for use in the preparation of fibers or films having a high strength and a high elastic modulus, said polyethylene powder having an intrinsic viscosity in the range of 5 to 30 dl/g in decalin at 135.degree. C. and being obtained by at least two-step polymerization reactions which are:a first step of polymerizing ethylene in the absence of hydrogen or at a reduced hydrogen concentration, using a catalyst containing a solid catalyst component and an organometallic compound, said solid catalyst component containing at least magnesium and titanium and/or vanadium, to produce 50-99.5 parts by weight, based on 100 parts by weight of a final polyethylene product, of polyethylene having an intrinsic viscosity of 12 to 32 dl/g in decalin at 135.degree. C.; anda second step of polymerizing ethylene at a higher hydrogen concentration that in said first step to produce 50-0.5 parts by weight of polyethylene.

摘要翻译： 该超高分子量聚乙烯粉末容易溶于有机溶剂，适用于制备具有高强度和高弹性模量的纤维或薄膜，所述聚乙烯粉末的特性粘度在5-30dl / g，在135℃的十氢化萘中，并通过至少两步聚合反应获得，所述反应为：在不存在氢气或在降低的氢浓度下使乙烯聚合的第一步骤，使用含有固体催化剂组分和 有机金属化合物，所述固体催化剂组分至少含有镁和钛和/或钒，基于100重量份的最终聚乙烯产品，产生50-99.5重量份的特性粘度为12至32dl的聚乙烯 / g，在135℃的萘烷中。 以及在较高氢浓度下聚合乙烯的第二步骤，在第一步骤中制备50至0.5重量份的聚乙烯。