摘要:
A process for the polymerisation and copolymerisation of olefins is disclosed, comprising contacting the monomeric olefin under polymerisation conditions with a polymerisation catalyst or catalyst system which comprises (a) a source of a Group VIII metal; (b) a bidentate phosphine ligand having the formula (R1)(R1)P-X-P(R1)(R1), where each R1 is independently selected from a phenyl group or a substitued phenyl group with the proviso that at least one of the R1 groups is a phenyl group having at least one ortho substituent, and X is a bridging group of the structure- [N]¿x?-[P]y-[N]- where x and y are independently 0 or 1, or -C(R?4)¿2- where R4 may be the same or different and is hydrogen or a monovalent hydrocarbyl, substituted hydrocarbyl or hetero-hydrocarbyl group; and optionally (c) a promoter.
摘要:
A method of making a heterogenously supported catalyst useful in dimerization, oligomerization or polymerization is provided in which a catalyst precursor containing a metal and an aromatic group are alkylated onto an oligomeric support having at least one terminal unsaturated group by Friedel Crafts alkylation.
摘要:
The invention relates to metallic compounds of general formula (I), where M is either Ni or Pd in the +II oxidation state; a method for the polymerisation or co-polymerisation of olefins with said ionic metallic compounds; supported catalysts for the polymerisation and co-polymerisation of olefins, containing one or more of the ionic metallic compounds; method for production of said ionic metallic compounds and said supported catalysts and method for the polymerisation or co-polymerisation of olefins using said supported catalysts.
摘要:
A method of making a heterogenously supported catalyst useful in dimerization, oligomerization or polymerization is provided in which a catalyst precursor containing a metal and an aromatic group are alkylated onto an oligomeric support having at least one terminal unsaturated group by Friedel Crafts alkylation.
摘要:
The invention relates to a method for producing an aqueous polymer dispersion by polymerisation of at least one unsaturated compound in an aqueous medium in the presence of at least one dispersant and one solid polymerisation catalyst.
摘要:
A method of preparing generally amorphous copolymers of ethylene and at least one norbornene (NB)-type comonomer. This method comprises polymerizing said monomers in a diluent or in bulk in the presence of a cationic palladium catalyst resulting from reacting a chelating ligand with a palladium (II) compound. Specific copolymers of ethylene and substituted norbornene-type monomers are also claimed.
摘要:
Ethylene can be polymerized, and optionally copolymerized with other selected olefins, using a polymerization catalyst system containing nickel and selected t-butyl substituted phosphines. Some of the resulting polymers have novel structures. The polymers are useful for films and molding resins.
摘要:
The invention discloses methods of preparing copolymers from norbornene-type monomers and cationically polymerizable monomers or polymers from catalytically polymerizable monomers by employing Group VIII transition metal ion source in a solvent for said monomers at a temperature in the range from -100 °C to 120 °C. Also disclosed are copolymers from norbornene-type monomers and catalytically polymerizable monomers.