Injection stretch blow molded articles and random copolymers for use in the same

Injection stretch blow molded articles and random copolymers for use in the same

  • CN 104,761,825 B
  • Filed: 03/24/2010
  • Issued: 05/05/2020
  • Est. Priority Date: 03/26/2009
  • Status: Active Grant
First Claim
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1. Use of a polymer composition for injection stretch blow molding in the absence of a clarifying agent to form a transparent medical-grade or cosmetic-grade article, the polymer composition comprising:

  • a metallocene random propylene-based copolymer having a metallocene group,wherein the metallocene random propylene-based copolymer has a melting point of 105 ℃

    to less than 130 ℃

    , a melt flow rate of 1-40 dg/min, a recrystallization temperature in the range of 85 ℃

    to 100 ℃

    as determined by DSC, a microtacticity in the range of 89% to 99%, and a molecular weight M in the range of 170,000-w

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