Patent ID: 8431065
Filing Date: 2013-04-30
Classification: C08K,C08L

Abstract:
1. A method for making a crosslinked elastomeric article, comprising: (a) forming an elastomeric composition comprising: (i) at least one propylene-based polymer comprising propylene derived units and one or more dienes, the propylene-based polymer having a triad tacticity of from 50% to 99% and a heat of fusion of less than 80 J/g; and (ii) at least one component selected from the group consisting of hindered phenols, phosphites, and hindered amines; (b) adding to the elastomeric composition at least one co-agent selected from the group consisting of multifunctional acrylates, and multifunctional methacrylates, functionalized polybutadiene resins, functionalized cyanurate, and allyl isocyanurate; (c) blending the elastomeric composition and co-agent to form a homogenous blend and extruding the resulting elastomeric composition blend with an extruder; and (d) crosslinking the extruded elastomeric composition using electron beam radiation having an e-beam dose of about 200 kGy or less, wherein the co-agent is added to the extruder downstream of the elastomeric composition.