Hyperbranched polyethylenes and a process for making
AssigneeExxonMobil Research and Engineering Company
InventorsYong Yang, Andy Haishung Tsou
Life of this patent
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Abstract
A process for making a hyperbranched polyethylene. The process has the steps of (a) reacting a multifunctional acrylate monomer with an α,ω-diene monomer in the presence of a first catalyst to form an alternating acrylate/diene copolymer and (b) reacting the alternating acrylate/diene copolymer with a late transition metal α-diimine catalyst to form a multi-nuclear initiator for chain walking polymerization of ethylene. There is also a process for forming a multi-nuclear initiator. There is also a hyperbranched polymer.
Claims15
A process for making a hyperbranched polyethylene, comprising:
- a) reacting a multifunctional acrylate monomer with a α,ω-diene monomer in the presence of a first catalyst to form an alternating acrylate/diene copolymer;
- b) reacting the alternating acrylate/diene copolymer with a late transition metal α-diimine catalyst to form a multi-nuclear initiator;
- and
- c) reacting the multi-nuclear initiator with ethylene.
A process for making a multi-nuclear initiator, comprising:
- (a) reacting a multifunctional acrylate monomer with a α,ω-diene monomer in the presence of a first catalyst to form an alternating acrylate/diene copolymer and
- (b) reacting the alternating acrylate/diene copolymer with a late transition metal α-diimine catalyst to form a multi-nuclear initiator.
A hyperbranched polymer, comprising:
- a backbone of an alternating copolymer of a multifunctional acrylate monomer and a α,ω-diene monomer and a plurality of hyperbranched polyethylene branches.
Dependencies are inferred from the claim text.