Patent ID: 9243092
Filing Date: 2016-01-26
CPC Classification: C08F,Y10S

Claim Text:
1. A polymerization process comprising contacting ethylene and an alpha olefin with a polymerization catalyst in a gas phase reactor, wherein the polymerization catalyst comprises a titanium based phosphinimine catalyst, a silica support, an alkylaluminoxane cocatalyst, and a catalyst modifier having the formula: R 1 R 2 x N((CH 2 ) n OH) y wherein R 1 is a hydrocarbyl group having from 5 to 30 carbon atoms, R 2 is hydrogen or a hydrocarbyl group having from 1 to 30 carbon atoms, x is 1 or 0; when x is 1, y is 1, and n is an integer from 1 to 30; when x is 0, y is 2, and each n is independently an integer from 1 to 30; and further wherein the process produces a polyethylene copolymer having i) a bulk density of at least 18 lbs/ft ii) a polymer flowability of 30 seconds or less, at a productivity of at least 2000 grams of polymer per gram of polymerization catalyst.