摘要:
Methods for preparing olefin polymers, and catalysts for preparing olefin polymers are disclosed. The polymers can be prepared by contacting the corresponding monomers with a Group 8-10 transition metal catalyst. The polymers are suitable for processing in conventional extrusion processes, and can be formed into high barrier sheets or films, or low molecular weight resins for use in synthetic waxes in wax coatings or as emulsions.
摘要:
Catalyst compositions useful for the polymerization or oligomerization of olefins are disclosed. Certain of the catalyst compositions comprise N-pyrrolyl substituted nitrogen donors. Also disclosed are processes for the polymerization or oligomerization of olefins using the catalyst compositions.
摘要:
Methods for preparing olefin polymers, and catalysts for preparing olefin polymers are disclosed. The polymers can be prepared by contacting the corresponding monomers with a Group 8-10 transition metal catalyst and a solid support. The polymers are suitable for processing in conventional extrusion processes, and can be formed into high barrier sheets or films, or low molecular weight resins for use in synthetic waxes in wax coatings or as emulsions.
摘要:
A catalyst for the polymerization of olefins is disclosed. The catalyst comprises a complex comprising (a) a ligand of the formula X, (b) a group 8-10 transition metal, and optionally (c) a Bronsted or Lewis acid, wherein R1 and R6 are each, independently, hydrocarbyl, substituted hydrocarbyl, or silyl; N represents nitrogen; and A and B1 are each, independently, a heteroatom connected mono-radical wherein the connected heteroatom is selected from Group 15 or 16 of the Periodic Table; in addition, A and B1 may be linked to each other by a bridging group. The complex is attached to a solid support. The solid support, the Bronsted or Lewis acid, and the complex may be combined in any order to form the catalyst. A process for making the catalyst is also described. Olefin polymerization and copolymerization processes are also described.
摘要:
Disclosed herein are compounds and processes useful for the oligomerization and polymerization of olefins. Transition metal catalyst complexes of groups 7 through 10 with tridentate ligands are described, along with a representative polymerization of ethylene using one of the cobalt complexes. The transition metal complexes of the invention may also be attached to a solid support and used in gas phase processes.
摘要:
The present invention is directed to copolymers of norbornene and functional group containing norbornene comonomers and processes for the preparation thereof. These polymers may be random, alternating or block copolymers or terpolymers, etc. In general, the present invention describes a polymer composition of the formula: [A]S— and —[B]T wherein A is monomer repeat unit derived from one or more norbornene or substituted norbornene monomers and B is a monomer repeat unit derived from one or more functionalized norbornene compounds.
摘要:
Methods for preparing olefin polymers, and catalysts for preparing olefin polymers are disclosed. The polymers can be prepared by contacting the corresponding monomers with a Group 8-10 transition metal catalyst. The polymers are suitable for processing in conventional extrusion processes, and can be formed into high barrier sheets or films, or low molecular weight resins for use in synthetic waxes in wax coatings or as emulsions.
摘要:
Catalyst compositions useful for the polymerization or oligomerization of olefins are disclosed. Certain of the catalyst compositions comprise N-pyrrolyl substituted nitrogen donors. Also disclosed are processes for the polymerization or oligomerization of olefins using the catalyst compositions.
摘要:
Catalyst compositions useful for the polymerization of olefins are disclosed. These compositions comprise a Group 8-10 metal complex comprising a bidentate or variable denticity ligand comprising one or two nitrogen donor atom or atoms independently substituted by an aromatic or heteroaromatic ring(s), wherein the ortho positions of said ring(s) are substituted by aryl or heteroaryl groups. Also disclosed are processes for the polymerization of olefins using the catalyst compositions.
摘要:
Catalyst compositions useful for the polymerization of olefins are disclosed. These compositions comprise a Group 8-10 metal complex comprising a bidentate or variable denticity ligand comprising one or two nitrogen donor atom or atoms independently substituted by an aromatic or heteroaromatic ring(s), wherein the ortho positions of said ring(s) are substituted by aryl or heteroaryl groups. Also disclosed are processes for the polymerization of olefins using the catalyst compositions.