发明授权
US4760120A Easily soluble polyethylene powder for the preparation of fibers or
films having high strength and high elastic modulus
失效
用于制备具有高强度和高弹性模量的纤维或薄膜的易溶性聚乙烯粉末
- 专利标题: Easily soluble polyethylene powder for the preparation of fibers or films having high strength and high elastic modulus
- 专利标题(中): 用于制备具有高强度和高弹性模量的纤维或薄膜的易溶性聚乙烯粉末
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申请号: US941858申请日: 1986-12-15
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公开(公告)号: US4760120A公开(公告)日: 1988-07-26
- 发明人: Akira Sano , Tetsujirou Kuroishi , Yasunosuke Miyazaki , Shigeki Yokoyama , Kazuo Matsuura
- 申请人: Akira Sano , Tetsujirou Kuroishi , Yasunosuke Miyazaki , Shigeki Yokoyama , Kazuo Matsuura
- 申请人地址: JPX Tokyo
- 专利权人: Nippon Oil Company, Limited
- 当前专利权人: Nippon Oil Company, Limited
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX60-281856 19851217
- 主分类号: C08L23/06
- 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
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.