The present invention provides a resin suitable for use in rotational molding having an environmental stress crack resistance of greater than 1000 hours. The resin has a density from 0.937 to 0.942 g/cm, a melt index Idetermined according to ASTM D 1238 (2.16 kg 190°C - I) from 4.0 to 7.0 g/10min, an Idetermined according to ASTM D 1238 (21.6 kg 190°C - I) from 160 to 200 g/10 min, an I/Ifrom 30 to 40 and a terminal vinyl unsaturation greater than 0.06, per 1000 carbon atoms; and a primary structure parameter (PSP2) of from 4 to 7, and an overall Mw/Mn from 2.7 to 3.5 comprising from 2 to 5 weight % of one or more C-alpha olefin comonomers.
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机译：本发明提供了一种适用于滚塑的树脂，其耐环境应力开裂性大于1000小时。树脂的密度为0.937至0.942 g / cm，根据ASTM D 1238（2.16 kg 190°C-I）测定的熔体指数为4.0至7.0 g / 10min，根据ASTM D 1238（21.6 kg 190）测定的°C-I）每1000个碳原子160到200 g / 10 min，I / I从30到40，末端乙烯基不饱和度大于0.06;初级结构参数（PSP2）为4至7，且总体Mw / Mn为2.7至3.5，包含2至5重量％的一种或多种C-α烯烃共聚单体。
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