| 摘要 |
<p>The invention relates to a method for producing pellets of an olefinic copolymer with a crystallinity at 23°C below 1 wt% measured by DSC according to ASTM E793 using HDPE as an external standard, said copolymer having a melt flow index measured according to ISO1 133 at 190°C, 2160 g greater than 2 g/10min wherein the method consists in grafting from 0.5 to 5 wt% ethylenically unsaturated carboxylic acid material onto said copolymer backbone to form an acylated olefin copolymer, melt-extruding the resulting mixture and cooling, solidifying and pelletizing the resulting melt-extrudate, storing the resulting pellets for at least one week. The invention further relates to a free flowing pellet comprising an olefinic copolymer with a crystallinity at 23°C below 1 wt% measured by DSC according to ASTM E793 using HDPE as an external standard, said copolymer having a melt flow index measured according to ISO1 133 at 190°C, 2160 g greater than 2 g/10min, characterized in that the copolymer comprises from 0.5 to 5 wt% ethylenically unsaturated carboxylic acid material.</p> |
