The present invention provides a resin suitable for use in rotational moldinghaving an environmental stress crack resistance of greater than 1000 hours.The resinhas a density from 0.937 to 0.942 g/cm3, a melt index12 determined accordingto ASTMD 1238 (2.16 kg 190°C ¨I2) from 4.0 to 7.0 g/10min, an I21 determinedaccording toASTM D 1238 (21.6 kg 190°C ¨I21) from 160 to 200 g/10 min, an I21/I2from 30 to 40and a terminal vinyl unsaturation greater than 0.06, per 1000 carbon atoms;and aprimary structure parameter (PSP2) of from 4 to 7, and an overall Mw/Mn from2.7 to3.5 comprising from 2 to 5 weight % of one or more C4-8 alpha olefincomonomers.
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机译：本发明提供了适用于滚塑的树脂具有大于1000小时的耐环境应力开裂性。树脂密度为0.937至0.942 g / cm3，熔体指数12根据符合ASTMD 1238（2.16 kg 190°C¨I2）从4.0到7.0 g / 10min，I21确定根据ASTM D 1238（21.6 kg 190°C¨I21）从160到200 g / 10 min，I21 / I2从30到40每1000个碳原子的末端乙烯基不饱和度大于0.06;和一个主结构参数（PSP2）为4至7，总Mw / Mn为2.7至3.5包含2至5重量％的一种或多种C 4-8α-烯烃共聚单体。
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