| 摘要 |
<p>There is provided a polybutene resin excelling in rigidity, creep characteristics, impact resistance strength, pressure resistance strength, heat resistance, abrasion resistance, flexibility, etc. and having a good balance between moldability, particularly high-speed moldability and pressure resistance strength, and a pipe material and a pipe comprising the same, such as a pipe for cold and hot water. A polybutene resin (1) comprising 80 mol% or more of the 1-butene unit and 20 mol% or less of an alpha -olefin unit, (2) having a melt flow rate (MFR) of 0.01 to 10 g/10 minutes, (3) having a molecular weight distribution represented by the ratio (Mw/Mn) of a weight-average molecular weight (Mw) to a number-average molecular weight (Mn) of 6 or larger, and (4) in a molecular weight distribution curve plotted on the basis of a chromatograph by gel permeation chromatography (GPC), the portion of weight-average molecular weights of 6x10<5> or higher accounting for 20% or larger of the total area, which is defined as the area surrounded with the curve and the horizontal axis, and a pipe material and a pipe comprising the same.</p> |
