摘要:
The invention relates to a borohydride metallocene complex of a lanthanide, the preparation method thereof, a catalytic system including said borohydride metallocene complex, a method for the copolymerisation of olefins using said catalytic system and an ethylene/butadiene copolymer obtained using said method, having butadiene units with 1,2-cyclohexane or 1,2 and 1,4-cyclohexane chains. The inventive complex has one of the following formulas (A and B), wherein, in formula A, two molecules of ligands Cp1 and Cp2 are linked to the lanthanide Ln, such as Nd, said ligand molecules each consisting of a fluorenyl group, and, in formula B, a ligand molecule is linked to the lanthanide Ln, said ligand molecule consisting of two fluorenyl groups Cp1 and Cp2 which are interlinked by means of a bridge P having formula MR1R2, in which M is an element from column IVA, such as Si, and R1 and R2, which may be identical or different, represent an alkyl group having between 1 and 20 carbon atoms. According to the invention, L represents an alkali metal, such as Li, N represents a molecule of a complexing solvent, such as THF, x is an integer or a non-integer which is greater than 0 and p is an integer which is equal to or greater than 1.
摘要:
The invention relates to a borohydride metallocene complex of a lanthanide, the preparation method thereof, a catalytic system including said borohydride metallocene complex, a method for the copolymerisation of olefins using said catalytic system and an ethylene/butadiene copolymer obtained using said method, having butadiene units with 1,2-cyclohexane or 1,2 and 1,4-cyclohexane chains. The inventive complex has one of the following formulas (A and B), wherein, in formula A, two molecules of ligands Cp1 and Cp2 are linked to the lanthanide Ln, such as Nd, said ligand molecules each consisting of a fluorenyl group, and, in formula B, a ligand molecule is linked to the lanthanide Ln, said ligand molecule consisting of two fluorenyl groups Cp1 and Cp2 which are interlinked by means of a bridge P having formula MR1R2, in which M is an element from column IVA, such as Si, and R1 and R2, which may be identical or different, represent an alkyl group having between 1 and 20 carbon atoms. According to the invention, L represents an alkali metal, such as Li, N represents a molecule of a complexing solvent, such as THF, x is an integer or a non-integer which is greater than 0 and p is an integer which is equal to or greater than 1.
摘要:
The invention relates to a borohydride metallocene complex of a lanthanide, the preparation method thereof, a catalytic system including said borohydride metallocene complex and a method for the copolymerisation of olefins using said catalytic system. The inventive complex has one of the following formulas (A and B), wherein, in formula A, two ligands Cp1 and Cp2 are linked to the lanthanide Ln, such as Nd, said ligands each consisting of a cyclopentadienyl group, and, in formula B, a ligand molecule is linked to the lanthanide Ln, said ligand molecule consisting of two cyclopentadienyl groups Cp1 and Cp2 which are interlinked by means of a bridge P having formula MR1R2, in which M is an element from column IVA, such as Si, and R1 and R2, which may be identical or different, represent an alkyl group having between 1 and 20 carbon atoms. According to the invention, L represents an alkali metal, such as Li, N represents a molecule of a complexing solvent, such as THF, x is an integer or a non-integer which is greater than 0, p is an integer which is equal to or greater than 1 and y is an integer which is equal to or greater than 0.
摘要:
The present invention relates to copolymers with polar and non-polar olefin blocks with a variable polar monomer content of 0.1 mol % to 99.9 mol %. The invention also relates to a method for obtaining copolymers with olefin blocks and vinyl polar monomer blocks, said method using a single-component catalytic system made up of an organometallic complex containing a metal belonging to groups VIII to X. Said organometallic complex is advantageously active in the medium without adding a co-catalyst.
摘要:
The present invention relates to a process for preparing an activating support for metallocene complexes in the polymerisation of olefins comprising the steps of: I) providing a support consisting in particles formed from at least one porous mineral oxide; II) optionally fixing the rate of silanols on the surface of the support; III) functionalising the support with a solution containing a metallic salt; IV) heating the functionalised support of step c) under an inert gas or hydrogen; V) oxidising the support of step IV by treatment under N 2 O and then under oxygen; Vl) retrieving an active support having a controlled number of OH groups. That activating support is used to activate a metallocene catalyst component for the polymerisation of olefins.
摘要:
The present invention discloses an active supported catalyst system comprising: a) an iron-based non-metallocene catalyst component; b) an alkylating agent; c) an activating functionalised and fluorinated support. It also discloses a method for preparing said active supported catalyst system and its use in the polymerisation of olefins.