Title:
LOW-BULK-DENSITY ULTRA-HIGH-MOLECULAR-WEIGHT POLYETHYLENE MICROPOWDER
Document Type and Number:
WIPO Patent Application WO/2022/062944
Kind Code:
A1
Abstract:
Provided is ultra-high-molecular-weight polyethylene particles. The particle size of the particles is less than that of a conventional commercially available ultra-high-molecular-weight polyethylene, and the density of the particles is small. In particular, provided is microparticles having properties as shown below: (a) the viscosity average molecular weight being in the range of 1.5 to 8 million; (b) the fraction by weight through a 100-mesh screen being at least 85% or more, with the median particle size (d50) being 80 μm ≤ d50 ≤ 110 μm; (c) the powder bulk density being 0.20 to 0.30 g/cm3; and (d) the number of branches per 100,000 backbone carbon atoms being less than 1. The ultra-high-molecular-weight polyethylene particles provided by the present invention are suitable for producing microporous filter materials.
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Inventors:
ZHU BENHU (CN)
SU WEI (CN)
TAN KAI (CN)
TANG YONG (CN)
ZHOU JIAOLONG (CN)
LI JUNFANG (CN)
SUN XIULI (CN)
PENG AIQING (CN)
SU WEI (CN)
TAN KAI (CN)
TANG YONG (CN)
ZHOU JIAOLONG (CN)
LI JUNFANG (CN)
SUN XIULI (CN)
PENG AIQING (CN)
Application Number:
PCT/CN2021/118059
Publication Date:
March 31, 2022
Filing Date:
September 13, 2021
Export Citation:
Assignee:
SHANGHAI INST ORGANIC CHEMISTRY CAS (CN)
International Classes:
C08F10/02; C08F2/04; C08F4/02; C08F4/64; C08F4/642; C08F4/70; C08F10/00; C08F110/02; C08L23/06; C08L23/08
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Other References:
WANG XINKE, SIT MET-MET, SUN JIEA, TANG YONG, XIE ZUOWEI: "Synthesis, Structure and Ethylene Polymerization Behavior of Group 4 Metal Complexes Bearing Salicylaldaminato Ligands with Appended Donor Functionality", ACTA CHIMICA SINICA, vol. 70, no. 18, 1 January 2012 (2012-01-01), CN , pages 1909 - 1916, XP055913947, ISSN: 0567-7351, DOI: 10.6023/A12060342
DANIEL C. H. OAKES , BRIAN S. KIMBERLEY , VERNON C. GIBSON *, DAVID J. JONES , ANDREW J. P. WHITE , DAVID J. WILLIAMS: "The surprisingly beneficial effect of soft donors on the performance of early transition metal olefin polymerization catalysts", CHEMICAL COMMUNICATIONS, no. 19, 1 January 2004 (2004-01-01), UK , pages 2174 - 2175, XP008060901, ISSN: 1359-7345, DOI: 10.1039/b409870f
DANIEL C. H. OAKES , BRIAN S. KIMBERLEY , VERNON C. GIBSON *, DAVID J. JONES , ANDREW J. P. WHITE , DAVID J. WILLIAMS: "The surprisingly beneficial effect of soft donors on the performance of early transition metal olefin polymerization catalysts", CHEMICAL COMMUNICATIONS, no. 19, 1 January 2004 (2004-01-01), UK , pages 2174 - 2175, XP008060901, ISSN: 1359-7345, DOI: 10.1039/b409870f
Attorney, Agent or Firm:
XU&PARTNERS, LLC. (CN)
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