| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ethylenic polymer composition providing a silane crosslinked pipe, which provides a silane crosslinked pipe excellent in mechanical properties and emitting little odor during water passing, and raises no problems such as load soaring of an extruder, heat generation and die drool during pipe formation. <P>SOLUTION: An ethylenic polymer composition contains: 100 parts by weight of an ethylenic polymer which has a density of 920 to 950 kg/m<SP POS="POST">3</SP>, a melt flow rate (MFR) of 0.1 to 50 g/10-min, two peaks in a molecular weight measurement by gel permeation chromatography, a ration (Mw/Mn) of the weight-average molecular weight (Mw) and the number-average molecular weight (Mn) in the range of 2.0 to 7.0, and 0.15 or more of the number of carbon atoms of long chain branching per 1,000 carbon atoms in the main chain in a molecular weight fraction of ≥100,000 in Mn in molecular weight fractionation; 0.05 to 5 parts by weight of an organic peroxide; and 0.1 to 10 parts by weight of an organic unsaturated silane compound. <P>COPYRIGHT: (C)2012,JPO&INPIT |
