Linear vinylene carbonate/1-olefin copolymer and articles formed therefrom
AssigneeCryovac, Inc.
InventorsDonald Albert Bansleben, Stefan Kilian Friedrich, Robert Howard Grubbs, Robert Tan Li, Chunming Wang, Todd Ross Younkin
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Abstract
Substantially linear vinylene carbonate/1-olefin copolymers, a process of forming the same, and packaging materials incorporating the same are described. These copolymers are formed by reacting the component monomers in the presence of a single component, non-ionic polymerization catalyst at relatively low temperatures and pressures.
Claims20
A copolymer comprising mer units derived from vinylene carbonate and at least one 1-olefin, said copolymer having from 0 to about 5 long chain branches per 1000 carbon atoms.
A copolymer formed by contacting, at a temperature of from about -100.degree. to about +90.degree. C. and a pressure of from 1 atm to about 10.5 MPa, vinylene carbonate and at least one 1-olefin in the presence of a non-ionic late transition metal chelate of a bidentate salicylaldimine or a pyrrolaldimine ligand for a period of time sufficient to cause polymerization.
A process of forming a copolymer of vinylene carbonate and at least 1-olefin, comprising:
- a) contacting, in the presence of a non-ionic late transition metal chelate selected from a bidentate salicylaldimine and pyrrolaldimine ligand, vinylene carbonate and said at least one 1-olefin in a molar ratio of from about 0.1:1 to about 25:1 at a temperature of from -100.degree. to 90.degree. C. and a pressure of from 1 atm to 10.5 MPa, and
- b) recovering said copolymer.
Dependencies are inferred from the claim text.