Patent ID: 6376620
Filing Date: 2002-04-23
Classification: C08F,C08J,C08K

Abstract:
An intermediate for making a modified ethylene/&agr;-olefin/diene polymer, having improved green strength, comprising an ethylene/&agr;-olefin/diene polymer having a Mooney ML1+4 viscosity, measured according to ASTM D1646 at 125 C., up to 80 and a percent gel, measured according to ASTM D2765, Procedure A, up to 30percent in combination with an unreacted peroxide crosslinking agent in an amount appropriate to partially crosslink the ethylene/&agr;-olefin/diene polymer, under melt processing conditons, to make a modified ethylene/&agr;-olefin/diene polymer satisfying the following equations: MV&leq;â€ƒ&it;100W&leq;â€ƒ&it;(MS2-MS1MS1)wherein MV is the Mooney viscosity of the modified polymer measured as defined in step (A), MS1is the melt strength in centiNewtons of the polymer selected in step (A) when formulated according to ASTM D3568#2, MS2 is the melt strength in centiNewtons of the modified polymer also when formulated according to ASTM D3568#2, and W is 0.3.