Copolymerization of olefins
View Patent ↗Ethylene and/or propylene, and α-olefins may be copolymerized by contacting then with certain iron or cobalt complexes of selected 2,6-pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines). The polymers produced, some of which are novel, are useful as molding resins.
1. A copolymer of monomers consisting essentially of ethylene and a one or more olefins of the formula H 2 C═CHR 21 wherein R 21 is alkyl other than methyl, and wherein said copolymer has methyl branches and —R 21 branches, and wherein the total of said branches indicate an incorporation of H 2 C═CHR 21 of at least 0.5 mole percent, and wherein each of said methyl branches is attached to a carbon atom, and an —R 21 group is also attached to said carbon atom.
2. The copolymer as recited in claim 1 wherein said incorporation is at least 1 mole percent.
3. The copolymer as recited in claim 1 or 2 wherein R 21 is n-alkyl.
4. The copolymer as recited in claim 1 wherein R 21 is n-alkyl containing 2 to 8 carbon atoms.