-
1.发明授权Process for producing polyethylene material of high strength and high plastic modulus 失效生产高强度，高塑性模量的聚乙烯材料的方法
公开(公告)号：US5756660A
公开(公告)日：1998-05-26
申请号：US725058
申请日：1996-10-02
IPC分类号： C08F4/649 , B29C55/18 , C08F4/60 , C08F4/629 , C08F4/68 , C08F10/00 , C08F10/02 , C08F110/02 , C08J5/18 , D01F6/04 , C08F6/26
CPC分类号： C08J5/18 , B29C55/18 , C08F10/00 , C08F10/02 , D01F6/04 , B29K2023/0683 , C08F110/02 , C08J2323/04
摘要： A polyethylene article such as film or fiber having high strength and high elastic modulus is produced by orienting an ultra-high molecular weight polyethylene having an intrinsic viscosity at 135.degree. C. in decalin of 5 to 50 dl/g, said ultra-high molecular weight polyethylene being prepared by homo- or copolymerizing ethylene in the presence of a catalyst system and hydrogen, said catalyst system comprising (1) a solid catalyst component containing at least magnesium, titanium and/or vanadium, (2) an organometallic compound and (3) a compound represented by the following general formula �I!: ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or a hydrocarbon residue, with the proviso that any two of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may conjointly form a cyclic hydrocarbon residue.
摘要翻译： 聚萘乙烯制品如具有高强度和高弹性模量的薄膜或纤维通过在135℃的特性粘度在5至50分升/克的十氢化萘中取向，得到超高分子量聚乙烯 所述催化剂体系包含（1）至少含有镁，钛和/或钒的固体催化剂组分，（2）有机金属化合物和（ 3）由以下通式[I]表示的化合物：原子或烃残基，条件是R 1，R 2，R 3和R 4中的任何两个可以结合形成环状烃残基。
-
公开(公告)号：US5006633A
公开(公告)日：1991-04-09
申请号：US395803
申请日：1989-08-18
摘要： An electroactive polymer is obtained by doping a copolymer represented by the following general formula (I): ##STR1## wherein R.sup.1 is hydrogen or a hydrocarbon residue having 1 to 20 carbon atoms; R.sup.2 is hydrogen, a hydrocarbon residue having 1 to 20 carbon atoms, furyl, pyridyl, nitrophenyl, chlorophenyl, or methoxyphenyl; l is an integer not smaller than 2; m is an integer not smaller than 1; and n is an integer not smaller than 2.
-
公开(公告)号：US4952667A
公开(公告)日：1990-08-28
申请号：US204083
申请日：1988-06-08
申请人： Yutaka Shikatani , Hobuyuki Kuroda , Naoki Kataoka , Yoshiyuki Shimo , Kazuo Matsuura , Etsuo Kawamata , Hiroshi Kobayashi
发明人： Yutaka Shikatani , Hobuyuki Kuroda , Naoki Kataoka , Yoshiyuki Shimo , Kazuo Matsuura , Etsuo Kawamata , Hiroshi Kobayashi
CPC分类号： H01B1/127 , C08G61/12 , C08G73/02 , C08G73/026 , C08G73/0273 , C08G73/06 , C08G73/0672 , H01B1/128
摘要： Provided is a copolymer having a repeating unit represented by the general formula ##STR1## wherein Ar represents ##STR2## wherein R.sup.1 represents hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 represents hydrogen, a hydrocarbon group having 1 to 20 carbon atoms, furyl, pyridyl, chlorophenyl, nitrophenyl or methoxyphenyl, n is 1 or more and an electroactive polymer obtained by doping the above copolymer.
-
公开(公告)号：US4835219A
公开(公告)日：1989-05-30
申请号：US131735
申请日：1987-12-11
CPC分类号： C08F10/02 , C08L23/06 , C08L2205/02 , C08L2205/025 , C08L2308/00 , C08L2314/02
摘要： Disclosed is polyethylene composition having excellent environmental stress cracking resistance (ESCR) and giving molded articles with good surface properties.This composition comprises a blend of two specific types of polyethylene selected with due consideration for their molecular weight distribution in addition to their molecular weights, so that it has excellent melt tension, ESCR and moldability. Accordingly, it can suitably be used in blow molding and extrusion molding to produce molded articles with no shark skin, as well as vessels of very large size.This composition is formed by blending (A) polyethylene obtained according to a two-step polymerization process using a Ziegler catalyst containing magnesium and titanium, and (B) high-molecular-weight polyethylene obtained with the aid of a chromium-containing catalyst, in a specified proportion.
-
-
-
搜索结果
4 条记录 (耗时 0.008 秒)
