Small range 文档类型:"4"

Totally found 50975 items.

  • [专利] 用于制备超高分子量聚乙烯(UHMWPE)的催化剂
    请求保护双齿亚胺基萘酚前配体的第4族过渡金属络合物。这些可用作这样的催化剂:其用于使烯烃、优选乙烯聚合,特别是由于该催化剂的单位点性质而用于制备具有窄分子量分布的超高分子量聚乙烯。
  • [专利] Catalysts for preparation of ultra high molecular weight polyethylene (uhmwpe) and process for preparation thereof
    (WO2016207909) The present invention relates to novel polymerization catalysts. More particularly, the present invention relates to a novel catalysts for the preparation of ultra high molecular weight polyethylene (UHMWPE) and process for preparation thereof. The present invention further relates to a process for the preparation of disentangled ultra high molecular weight polyethylene (dis-UHMWPE).
  • [专利] (HR) Catalysts for preparing ultra high molecular weight polyethylene (uhmwpe)
    (HRP20171628) Group 4 transition metal complexes of bidentate iminonaphthol pro-ligands can be used as catalysts to polymerise olefins, such as ethylene. Group 4 transition metal complexes of bidentate iminonaphthol pro-ligands can have a single-site nature, allowing the catalysts to be used to prepare ultra high molecular weight polyethylene having a narrow molecular weight distribution. (From US9163100 B2)
  • [专利] Novel catalysts for preparation of ultra high molecular weight polyethylene (uhmwpe) and process for preparation thereof
    (IN2015DE01845) The present invention relates to novel polymerization catalysts. More particularly, the present invention relates to novel catalysts for the preparation of ultra high molecular weight polyethylene (UHMWPE) and process for preparation thereof. The present invention further relates to a process for the preparation of disentangled ultra high molecular weight polyethylene (dis-UHMWPE).
  • [专利] Catalysts for preparing ultra high molecular weight polyethylene (UHMWPE)
    (US9617362) Group 4 transition metal complexes of bidentate iminonaphthol pro-ligands can be used as catalysts to polymerize olefins, such as ethylene. Group 4 transition metal complexes of bidentate iminonaphthol pro-ligands can have a single-site nature, allowing the catalysts to be used to prepare ultra high molecular weight polyethylene having a narrow molecular weight distribution.
  • [专利] 一种高压模塑UHMWPE/PA6合金及其制备方法
    本发明公开了一种高压模塑UHMWPE/PA6合金及其制备方法,其是由超高分子量聚乙烯30-70份,尼龙6粉70-30份,马来酸酐接枝超高分子量聚乙烯5份-20份,马来酸酐接枝聚乙烯蜡0.5份-5份,抗氧剂0.1-1份经混合、模压成型即得UHMWPE/PA合金。本发明将马来酸酐接枝超高分子量聚乙烯作为相容剂,并通过颗粒微粉化处理,使超高分子量聚乙烯、尼龙6、马来酸酐接枝超高分子量聚乙烯的粒径均为100-200μm处于同一水平,提高了超高分子量聚乙烯和尼龙6之间的相容性与分散性,使制得的UHMWPE/PA6合金具有优异的耐磨性能和力学性能。
  • [专利] 一种制备超强UHMWPE纤维的方法及其相关催化剂
    本发明涉及一种制备超强超高分子量聚乙烯纤维的方法及其相关催化剂,该催化剂是通过将超高分子量聚乙烯催化剂负载于具有一个催化剂负载位的尺寸为0.01-10nm的无机颗粒上,再负载于多孔载体上而得到的非均相催化剂,所述无机颗粒采用POSS,制备时,先将POSS表面的8个有机取代基分别用烷基和一个负载官能团取代后,将POSS分子和多孔载体,按重量比0.1%-99%,在甲苯中搅拌0.5-24h,再用甲苯或者正己烷洗涤1-50次,加入超高分子量聚乙烯催化剂,搅拌2-8h,得到所需的催化剂;在通过聚合反应制得超强超高分子量聚乙烯纤维。本发明的催化剂在聚合时,使生长的聚乙烯链段不易发生缠绕,从而可在相对较高的温度下高效地制备无缠绕的超高分子量聚乙烯纤维,使得纤维拉伸强度大幅提高,加工性能得以改善。
  • [专利] 超高分子量聚乙烯纺丝溶液的制备方法和超高分子量聚乙烯纤维
    本发明公开了一种超高分子量聚乙烯纺丝溶液的制备方法和超高分子量聚乙烯纤维。本发明超高分子量聚乙烯纺丝溶液的制备方法包括如下步骤:将超高分子量聚乙烯料于助剂中采用物理方法进行辅助预溶胀处理,获得超高分子量聚乙烯溶胀液;将所述超高分子量聚乙烯溶胀液进行热溶解处理。本发明超高分子量聚乙烯纺丝溶液的制备方法能够使得所述超高分子量聚乙烯料初步溶胀,分子链得到初步解缠结,从而有效缩短了超高分子量聚乙烯溶解时间,降低了其溶解温度,避免了UHMWPE料在高温、长时间溶解条件下导致其分子量过度降解,从而赋予所述超高分子量聚乙烯纤维相关性能的稳定性。
  • [专利] N‑(4‑苯胺基苯基)‑酰胺化合物改性UHMWPE
    本发明为基于N‑(4‑苯胺基苯基)‑酰胺基化合物改性超高分子量聚乙烯材料,其特征在于:该材料的基体材料选自超高分子量聚乙烯;改性添加剂选自N‑(4‑苯胺基苯基)‑酰胺基化合物。所述N‑(4‑苯胺基苯基)‑酰胺基化合物改性超高分子量聚乙烯材料能够作为耐热管材使用。本发明能有效提高改性超高分子量聚乙烯材料的热传导性能,在作为耐热管料的使用过程中,能有效降低较高温度下的材料不稳定的风险,提高材料的使用寿命。
  • [专利] 一种UHMWPE熔融挤出级复合材料及其制备方法、成型工艺和应用
    本发明涉及一种UHMWPE熔融挤出级复合材料及其制备方法、成型工艺和应用,该复合材料,按重量份将100份超高分子量聚乙烯、2~40份复合流动改性剂、0.5~5份润滑剂、0.1~10份熔体光滑剂高速(转速700‑1400转/分钟)混合,然后将混合物通过单螺杆挤出机挤出,挤出温度控制在150‑280℃,然后在管材模具内压缩、成型,最后在真空定型水箱中冷却定型管材。与现有技术相比,本发明挤出制备的可熔融挤出成型超高分子量聚乙烯管材成型速度5‑50m/h,较目前用硬顶法挤出制备的超高分子量聚乙烯管材提高10‑15倍,大幅度提高了生产效率,同时管材还具备优异的耐磨性和抗冲击性能。
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