Patent ID: 7935760

Claim:
A process for producing a heterogeneous polymer blend comprising a first phase comprising a thermoplastic first polymer having a crystallinity of at least 30% and a second phase comprising a second polymer having a crystallinity of less than 20% and being at least partially cross-linked, the process comprising the steps of: (a) polymerizing at least one first C 3 to C 20 olefin monomer in a first reaction zone and in the presence of a supported catalyst to produce said thermoplastic first polymer in a slurry polymerization process; and (b) contacting at least part of said first thermoplastic polymer with at least one second C 2 to C 20 olefin monomer and at least one α,ω-diene in a second reaction zone under solution, suspension or slurry polymerization conditions sufficient to polymerize said second monomer and to cross-link said second polymer to produce said second polymer such that said second phase comprises hybrid particles and at least a fraction which is insoluble in xylene, wherein said hybrid particles comprise said thermoplastic first polymer and said second polymer.