Patent ID: 7985799
Filing Date: 2011-07-26
Classification: C08L

Abstract:
1. A process for preparing polyolefin blends comprising: polymerizing in a solution phase propylene or 1-butene, optionally in presence of α-olefin comonomers of formula CH polymerizing in a solution phase 1-hexene or 1-octene, optionally in presence of α-olefin comonomers of formula CH mixing the polymeric solution comprising the semicrystalline polymer component and the polymeric solution comprising the completely amorphous polymer component to form a mixture; and subjecting the mixture to a devolatilization, step to separate a polyolefin blend comprising the semicrystalline component and the amorphous component from volatile components; wherein the polymeric solution comprising the semicrystalline polymer component and the polymeric solution comprising the completely amorphous component are simultaneously prepared in two polymerization reactors connected in parallel, and then respectively transferred from each reactor to the mixing step.