3 results about "Imine ligands" patented technology

The invention provides an alpha-diimine ligand compound, an alpha-diimine nickel catalyst and a preparation method and application of the alpha-diimine ligand compound and the alpha-diimine nickel catalyst, and belongs to the technical field of organic synthesis. Wherein R1 is selected from hydrogen, methoxyl or tertiary butyl; r2 is selected from methyl, ethyl or isopropyl; and R3 is selected from hydrogen or methyl. The alpha-diimine nickel catalyst prepared by adopting the alpha-diimine ligand compound can catalyze olefin to carry out homopolymerization reaction or copolymerization reaction, so that not only is excellent catalytic performance shown, but also a polyolefin material obtained by catalyzing olefin monomer homopolymerization reaction has excellent elastic recovery performance; and the catalyst has certain application potential in olefin polymerization industry.

This description provides titanium complexes containing 1) a cyclopentadienyl ligand; 2) an adamantyl-phosphinimine ligand; and 3) at least one activatable ligand. The use of the complex, in combination with an activator, as an olefin polymerization catalyst is demonstrated. The catalysts are effective for the copolymerization of ethylene with an alpha olefin (such as 1-butene, 1-hexene, or 1-octene) and enable the production of high molecular weight copolymers (Mw greater than 25,000) with high productivity under solution polymerization conditions.

The present disclosure provides a polynuclear diimine ligand compound, a polynuclear diimine catalyst and a preparation method and application thereof, and belongs to the technical field of polyolefins. The polynuclear diimine ligand compound has a structure as shown in formula (I), wherein R1 and R2 are each independently selected from hydrogen, methyl, ethyl, C3-C8 isomerized alkyl, benzhydryl, methoxy, 4-tert-butylphenyl and biphenyl; and R3 is selected from hydrogen, methyl, ethyl, methoxy, C3-C8 isomerized alkyl, halogen and nitro. Formula (I).