Azide-modified olefin as polymeric coupling agent
AssigneeBraskem America, Inc.
InventorsChip Few, Jonas Alves Fernandes
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Abstract
This invention relates to a process for forming a long-chain branched polymer and a long-chain branched polymer resulting from the process. The process comprises reacting (a) a polyolefin base polymer with (b) a coupling agent comprising a polymeric coupling agent, optionally blended with a molecular coupling agent, the polymeric coupling agent being a modified polyolefin having a reactive coupling group at one or more terminal ends of the modified polyolefin chain, to couple the polyolefin base polymer (a) with the coupling agent (b) to form a long-chain branched polymer having a long-chain branching and/or higher surface energy relative to the polyolefin base polymer.
Claims14
A polymeric coupling agent comprising:
- a polymer comprising at least one of the following repeating units:
- wherein:
- R′ is vinyl, —C(O)H, or —CN;
- and
- one or more reactive coupling groups covalently bonded to one or more repeating units of the polymer as pendent groups, optionally via one or more linking moieties,
- wherein the reactive coupling group is selected from the group consisting of sulfonyl azide, aryl azide, phosphoryl azide, acyl azide, formyl azides, and combinations thereof,
- wherein the polymer further comprises one or more reactive coupling groups covalently bonded to one or more terminal ends of the polymer chain.
A polymeric coupling agent comprising:
- a copolymer comprising repeating units of
- or combinations thereof, and
- one or more of the following repeating units:
- wherein:
- R′ is aryl, —C(O)R″, or —CN, and
- R″ is H or NH2;
- and
- one or more reactive coupling groups covalently bonded to one or more repeating units of the copolymer as pendent groups, optionally via one or more linking moieties,
- wherein the reactive coupling group is selected from the group consisting of sulfonyl azide, aryl azide, phosphoryl azide, acyl azide, formyl azides, and combinations thereof,
- wherein the copolymer further comprises one or more reactive coupling groups covalently bonded to one or more terminal ends of the polymer chain.
Dependencies are inferred from the claim text.