Polypropylene for microporous film

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United States of America Patent

PATENT NO 10011693
SERIAL NO

14438599

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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[Problem] To provide polypropylene for a microporous film having excellent heat resistance and strength. [Solution] Polypropylene for a microporous film satisfying the following requirements (1) and (2): (1) the weight-average molecular weight (Mw) value, as determined by gel permeation chromatography (GPC), is not less than 100,000 but less than 800,000, the value (Mw/Mn) obtained by dividing the weight-average molecular weight by the number-average molecular weight is more than 7.0 but not more than 12.0, and the value (Mz/Mw) obtained by dividing the Z-average molecular weight by the weight-average molecular weight is not less than 3.8 but not more than 9.0, and (2) the mesopentad fraction, as measured by 13C-NMR (nuclear magnetic resonance method), is not less than 95.5%.

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Patent Owner(s)

  • PRIME POLYMER CO. LTD

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ohta, Katsutoshi Ichihara, JP 16 147
Satou, Chikara Ichihara, JP 1 5
Tamura, Satoshi Ichihara, JP 106 681
Yanagishita, Yoshio Ichihara, JP 3 5

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