Patent ID: 7282541
Filing Date: 2007-10-16
Classification: C08F

Abstract:
1. A process for preparing a functionalized propylene-based polymer comprising: contacting (i) a propylene-based polymer backbone comprising propylene derived units and one or more dienes with (ii) a free-radical initiator and (iii) at least one ethylenically unsaturated carboxylic acid or acid derivative, the backbone having a triad tacticity of from 50 to 99% and a heat of fusion of less than 80 J/g; reacting the at least one ethylenically unsaturated carboxylic acid or acid derivative with the backbone in the presence of the free-radical initiator wider conditions at which free radicals are generated to graft the backbone and provide a grafted propylene copolymer, the grafted propylene-based polymer comprising from about 0.3 wt % to about 10 wt % of one or more dienes; and pelletizing the grafted propylene copolymer to provide a pelletized grafted propylene copolymer, wherein the pellerized grafted propylene copolymer has a MFR (1.2 kg @ 190° C.) of from about 0.01 g/10 min to about 10 g/10 min.