Patent ID: 8653198
Filing Date: 2014-02-18
Classification: B29C,B29K,B29L,C08J,C08L

Abstract:
1. A method of preparing an impact copolymer, said method comprising: selecting a continuous phase propylene polymer or propylene copolymer; selecting a rubber phase polymeric material comprising ethylene/propylene rubber, wherein said impact copolymer has a R ratio of from 0.25 to less than 0.41, wherein the R ratio is the percentage by weight of ethylene in the rubber in the rubber phase, as determined by NMR, wherein said rubber phase polymeric material has an intrinsic viscosity lower than the viscosity of said continuous phase polymer; wherein the impact copolymer has an Mn ranging from 25,000 to 80,000, an Mw ranging from 150,000 to 450,000 and an Mz ranging from 450,000 to 1,500,000.