Polyethylene composition
    1.
    发明授权
    Polyethylene composition 失效
    聚乙烯组成

    公开(公告)号:US4792588A

    公开(公告)日:1988-12-20

    申请号:US19317

    申请日:1987-04-17

    CPC分类号: C08F10/02 C08F110/02

    摘要: A polyethylene composition having excellent melt moldability which substantially comprises an ultrahigh-molecular-weight polyethylene having a molecular weight of, for example, at least about 1,650,000 and a low-molecular-weight to high-molecular-weight polyethylene having a molecular weight of, for example, about 1500 to about 360,000. The composition is produced by a multi-stage polymerization process involving a step of producing the ultrahigh-molecular-weight polyethylene and a step of producing the low-molecular-weight to high-molecular-weight polyethylene.

    摘要翻译: PCT No.PCT / JP86 / 00325 Sec。 371日期:1987年4月17日 102(e)日期1987年4月17日PCT申请1986年6月26日PCT公布。 公开号WO87 / 00184 日本1987年1月15日。具有优异熔融成型性的聚乙烯组合物,其基本上包含分子量为例如至少约1,650,000和低分子量至高分子量的超高分子量聚乙烯 聚乙烯具有例如约1500至约360,000的分子量。 该组合物通过包括生产超高分子量聚乙烯的步骤的多阶段聚合方法和制备低分子量至高分子量聚乙烯的步骤来制备。

    Thermoplastic resin composition
    3.
    发明授权
    Thermoplastic resin composition 失效
    热塑性树脂组合物

    公开(公告)号:US4670508A

    公开(公告)日:1987-06-02

    申请号:US688400

    申请日:1985-01-02

    CPC分类号: C08L101/00

    摘要: A thermoplastic resin composition comprising a melt mixed product of (A) 70% to 98% by weight of at least one thermoplastic resin selected from the group consisting of polyamides, polyacetals, polyesters, and polycarbonates and (B) 30% to 2% by weight of ultra-high molecular weight polyolefin powder having an intrinsic viscosity [.eta.] of 10 dl/g or more, measured in decalin at 135.degree. C., and having an average particle size of 80 .mu.m or less and having a particle size distribution such that substantially all of the powder particles pass through a sieve having a sieve number of 100 and at least 20% by weight of the total powder particles pass through a sieve having a sieve number of 350.This thermoplastic resin composition has excellent abrasion resistance, excellent impact resistance, and a high critical PV value.

    摘要翻译: 一种热塑性树脂组合物,其包含(A)70%至98%重量的选自聚酰胺,聚缩醛,聚酯和聚碳酸酯的至少一种热塑性树脂的熔融混合产物和(B)30%至2% 特性粘度η为10dl / g以上的超高分子量聚烯烃粉末的重量,在135℃萘烷中测定,平均粒径为80μm以下,粒径为 分布,使得基本上所有的粉末颗粒通过筛数为100的筛子和至少20重量%的总粉末颗粒通过筛数为350的筛子。该热塑性树脂组合物具有优异的耐磨性 ,优异的抗冲击性和高临界PV值。

    Process for producing random ethylene terpolymer
    4.
    发明授权
    Process for producing random ethylene terpolymer 失效
    制备无规乙烯三元共聚物的方法

    公开(公告)号:US4438243A

    公开(公告)日:1984-03-20

    申请号:US263721

    申请日:1981-05-14

    CPC分类号: C08F210/16 C08F4/022

    摘要: A process for producing a random terpolymer of ethylene and alpha-olefins having at least 3 carbon atoms in the presence of a catalyst composed of (1) a titanium catalyst component containing at least magnesium and titanium and (2) an organoaluminum catalyst component in a hydrocarbon solvent at a temperature above the melting point of the terpolymer formed, under such conditions that the resulting copolymer dissolves in the hydrocarbon solvent; characterized in that said terpolymer consists essentially of(A) more than 90 mole % to 99.5 mole % of ethylene,(B) 0.2 mole % to 9.8 mole % of an alpha-olefin with 3 to 4 carbon atoms, and(C) 0.2 mole % to 9.8 mole % of an alpha-olefin with 5 to 18 carbon atoms,the total of the proportions of the monomers (A), (B) and (C) being 100 mole %.

    摘要翻译: 一种在由(1)至少含有镁和钛的钛催化剂组分和(2)有机铝催化剂组分组成的催化剂存在下,具有至少3个碳原子的乙烯和α-烯烃的无规三元共聚物的制备方法, 在高于形成的三元共聚物的熔点的温度下,在所得共聚物溶解在烃溶剂中的条件下, 其特征在于所述三元共聚物基本上由(A)大于90摩尔%至99.5摩尔%的乙烯,(B)0.2摩尔%至9.8摩尔%的具有3至4个碳原子的α-烯烃和(C)0.2 摩尔%至9.8摩尔%的具有5至18个碳原子的α-烯烃,单体(A),(B)和(C)的比例合计为100摩尔%。