Patent ID: 9403956
Filing Date: 2016-08-02
CPC Classification: C08F,C08J,C08L

Claim Text:
1. A process for making an impact copolymer, comprising: polymerizing, in a gas-phase reactor, ethylene and at least one comonomer in the presence of one or more catalysts, polypropylene particles, and an inert solvent to produce an impact copolymer comprising the polypropylene particles and an ethylene copolymer, wherein: 1) the polypropylene particles introduced into the gas phase reactor have a weight average particle size along the longest cross-sectional length thereof of about 0.05 mm to about 5 mm and a pore volume of less than 80%, 2) the inert solvent is present in a volume amount of about 0.1 to about 2 times the pore volume of the polypropylene particles, and 3) the inert solvent comprises pentane, hexane, heptane, octane, nonane, decane, isomers thereof, and/or any mixture thereof; cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclononane, cyclodecane, or any mixture thereof; toluene, naphthalene, xylene and biphenyl, or any mixture thereof; cyclohexane, cyclopentane, methyl cyclohexane, or any mixture thereof; tetramethyl silane, tetraethyl silane, triethyl borane, or any mixture thereof; or hexane, cyclohexane, toluene, or any mixture thereof.