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6197715 Supported catalysts and olefin polymerization processes utilizing same  
Non-ionic late transition metal chelates of salicylaldimine and pyrrolaldimine can be tethered to an inert support by a covalent bond to provide a catalyst useful in slurry and gas phase...
6177529 Polymerization of olefins with bridged metallocene catalysts  
Bridged metallocenes of Group IVb metals provide improved results when the bridge comprises a neutral electron-donor substituent of general formula R'"ZR"" j wherein R'" is a rigid unsaturated...
6177528 Substituted aminomethylphosphines, compositions and coordination complexes of same, their synthesis and processes using same  
Novel aminomethylphosphine ligands have particular substituents on the central carbon atom. Such ligands form coordination complexes that may be catalysts for the polymerization of monomers or...
6174976 Neutral nickel complexes for olefin polymerization  
Provided are novel olefin polymerization catalysts based on neutral nickel complexes of bidentate ligands containing a nitrogen atom and an oxygen atom and a process for the preparation of...
6169152 Olefin polymerization catalyst comprising transition metal compound containing a cyclic ligand having at least two nitrogen atoms in its main chain skeleton  
An olefin-polymerizing catalyst which comprises (A) a transition metal compound having at least one cyclic amide ligand and (B) an organoaluminum compound and/or an aluminoxane compound with or...
6162884 Olefin oligomerization and processes thereof  
Novel catalyst systems which comprise 2-pyridine carboxaldimine nickel dihalide complexes can be used with an organoaluminum cocatalyst in slurry oligomerization or polymerization processes to...
6150482 Polymerization of propylene  
Propylene may be polymerized by contacting it with certain iron complexes of selected 2,6-pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines). The polymers produced are useful as...
6147172 Phosphinimine/heteroatom catalyst component  
Organometallic complexes having a phosphinimine ligand, a (non-phosphinimine) heteroligand and at least one activatable ligand are catalyst components for olefin polymerization. Preferred...
6137019 Process for converting a geminally substituted cyclopentadiene  
6133386 Metal oxide solid acids as catalysts for the preparation of hydrocarbon resins  
Metal oxide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer (e.g., styrene based monomers), C5 monomers, and C9 monomers to produce...
6127497 Elevated pressure polymerization processes with late transition metal catalyst systems  
The invention encompasses late transition metal catalyst systems and their use in polymerization processes, particularly in solution, 2-phase suspension and super-critical phase polymerization of...
6121181 Cyclic oligomeric oxo- and imido- metal complexes as olefin polymerization catalysts  
Single site nitrogen and oxygen metallacyclic catalysts comprising at least two polymerization-stable anionic ancillary ligands and a Group 4-10 metal are disclosed wherein the nitrogen or oxygen...
6121371 Application of atom transfer radical polymerization to water-borne polymerization systems  
A process is provided for the preparation of (co)polymer emulsions or suspensions from a full range of free radically (co)polymerizable monomers, wherein the (co)polymers exhibit the...
6121401 Propylene copolymer  
A propylene copolymer obtainable by polymerizing a propylene, at least one of α-olefin having 4-20 carbon atoms, and ethylene, in the presence of a catalyst for olefin polymerizaton including the...
6114483 Polymerization of olefins  
Mixtures of different polyolefins or branched polyolefins may be made by direct, preferably simultaneous, polymerization of one or more polymerizable olefins using two or more transition metal...
6114482 Process for the controlled radical polymerization or copolymerization of (meth) acrylic and vinyl monomers and (co) polymers obtained  
This process is characterized in that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension at a temperature which may be as low as 0° C., in...
6111041 Palladium (II) catalyized polymerization of norbornene and acrylates  
Homopolymers or copolymers of acrylates, homopolymers or copolymers of norbornenes, and copolymers of acrylates with norbornenes, may be prepared by contacting acrylate and/or norbornene monomer...
6107232 Polymerization catalyst and process for preparing polymer by use of same  
The present invention is directed to a polymerization catalyst which comprises (A) a transition metal compound represented by the general formula (I) L d MX e Y f Z g ...
6100356 Methods of (co)polymerizing vinyl and/or diene monomers and curing or crosslinking polymeric resins using a heteropoly acid peroxide promoter  
A method of (co)polymerizing vinyl and/or diene monomers comprising contacting the monomers with a (co)polymeriztion composition under conditions effective to (co)polymerize the monomers, wherein...
6093779 Polymerizable acetylene composition and acetylene photopolymerization process  
Compositions comprising at least one nonvolatile acetylene alone or together with a strained cycloolefin and catalytic amounts of a catalyst for metathesis polymerization, which comprise at least...
6087292 Metallocene catalysts comprising indenyl ligands substituted with electronegative groups  
A highly effective catalyst system for the polymerization of olefins comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## where M 1 =Zr or Hf, R 1 and R...
6075068 Dental compositions curable by ROMP  
The invention relates to dental compositions, containing (a) 5 to 70 wt. %, based on (a)+(b)+(d), of polymerizable monomers and/or polymers, (b) 0 to 95 wt. %, based on (a)+(b)+(d), of...
6069213 Mixed catalyst system  
It has been found that the use of at least one unsupported metallocene polymerization catalyst with at least one supported metallocene polymerization catalyst in the polymerization of olefins...
6063881 Oligomerization of propylene  
Propylene may be oligomerized by contact with cobalt complexes corresponding to the following structure: ##STR1## wherein R 1 -R 7 are hydrogen, hydrocarbyl or inert functional groups, and X is...
6051667 Olefin polymerization using a catalyst having a bridged cyclopentadienyl-phosphole ligand  
An olefin polymerization process uses a catalyst with an organometallic complex of a group 4 metal having a bridged cyclopentadienyl-phosphole ligand, as defined by the formula: ##STR1## wherein:...
6031057 Polymers of olefinically unsaturated monomers  
Polymers are obtained by polymerising olefinically unsaturated monomers in the presence of a metal complex having the general formula (I), in which the substituents and indexes have the following...
6020443 Polymerization of low grade DCPD monomers using an olefin metathesis catalyst  
Methods for synthesizing polyDCPD via ROMP of low grade DCPD starting materials using Ruthenium or Osmium carbene complex catalyst. Transparent or translucent polyDCPD materials. The Ruthenium or...
6013745 Phosphorus based catalysts for the polymerization of olefins  
The present invention relates to the polymerization of one or more alpha olefins in the presence of a transition metal catalyst having either a heterobifunctional ligand, having a phosphorus and a...
6011127 Process for the production of ethylenic polymers  
A process for the production of ethylenic polymers is disclosed in which an ethylenic monomer is polymerized in the presence of a catalyst comprising a chromium compound, an alumoxane and an...
6008306 Thermal metathesis polymerization process and a polymerisable composition  
Composition of (a) at least one strained cycloolefin and (b) a catalytic quantity of at least one divalent-cationic compound of ruthenium or osmium with a metal atom, to which are bound 1 to 3...
5986029 Catalyst composition and process for the polymerization of an olefin  
The invention relates to a new catalyst composition which is suitable for the polymerization of an olefin and which comprises a reduced transition metal complex and a co-catalyst. The invention is...
5986027 Olefin polymerization using a catalyst comprising a group VIIIB metal, and acid, and a bidentate chelating compound  
Polymers are obtainable by polymerizing olefinically unsaturated monomers in the presence of a catalyst system which comprises as active constituents a) a salt of a metal of group VIII B of the...
5977393 Schiff base derivatives of ruthenium and osmium olefin metathesis catalysts  
The present invention generally relates to ruthenium and osmium carbene catalysts for use in olefin metathesis reactions. More particularly, the present invention relates to Schiff base derivatives...
5969062 Process for producing ethylene copolymers under high pressure  
In a process for preparing copolymers of ethylene with C 3 -C 10 -alk-1-enes, the polymerization is carried out at pressures in the range from 1000 to 3500 bar and at from 200 to 280° C. in the...
5965677 Supported phosphinimine-Cp catalysts  
A catalyst component which is especially useful in so-called "slurry" or "gas phase" olefin polymerizations and which comprises an organometallic complex of a group 4 metal (having a...
5962609 Free radical polymerisation process  
Process for the free-radical polymerisation of olefinically unsaturated monomer(s) using a free-radical initiator, the polymerisation being performed in the presence of a compound for effecting...
5959047 3-aryl substituted indenyl containing metal complexes and polymerization process  
Group 4 metal constrained geometry complexes comprising a 3-aryl-substituted indenyl ligand, catalytic derivatives thereof and their use as olefin polymerization catalysts, especially for preparing...
5883277 Metallocene complexes with cationic bridges  
Metallocene complexes having a cationic bridge of the formula ##STR1## where the substituents have the following meanings: M is a metal of transition group III, IV, V or VI of the Periodic Table of...
5866663 Processes of polymerizing olefins  
Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The...
5854165 Transition metal compound, catalyst for olefin polymerization, process for preparing olefin polymer by use of catalyst  
A transition metal compound which is a multiple crosslinking type transition metal complex represented by the general formula (I) ##STR1## wherein M is a metallic element in the groups 3 to 10 or a...
5851945 Olefin polymerization catalyst compositions comprising group 5 transition metal compounds stabilized in their highest metal oxidation state  
The invention addresses Group 5 metal compounds suitable as polymerization catalysts characterized by comprising one Group 15 element polyanionic ancillary ligand and three single or multidentate...
5851946 Coordination catalyst systems comprising intramolecularly stabilized organometallic compounds  
The invention relates to the use of intramolecularly stabilized organometallic compounds as components in coordination catalyst systems, corresponding coordination catalyst systems and processes...
5847060 Functionalized diene oligomers  
This invention relates to the controlled molecular weight production of macromonomers and polymers with terminal conjugated double bonds from starting monomers including, but not limited to...
5840238 Process for the manufacture of fibre-reinforced composites  
Fiber-reinforced composites are made from introducing a fabric into the lower part of an open two-part mold, closing the mold and injecting into the mold under pressure and curing a reactive resin...
5830821 Process for olefin preparation using metallocenes having benzo-fused indenyl derivatives as ligands  
Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts A very effective catalyst system for olefin polymerization comprises a...
5821278 Process for polymerizing of cyclic olefins and a photopolymerizable composition  
Process for the photocatalytic polymerization of a cyclic olefin or at least two different cyclic olefins in the presence of a metal compound as catalyst, which comprises carrying out a...
5821310 Organometallic compounds and catalyst compositions  
There is provided an organometallic compound comprising a metal M of Group 3 to 6 of the Periodic Table or the Lanthanide series and at least one (hetero)cyclohexadienyl ligand of the general...
5811500 Process for the controlled radical (CO) polymerization of (Meth) acrylic vinyl vinylidene and diene monomers in the presence of an Rh Co OR Ir  
This process is characterized in that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature which may be as low as 0° C., in...
5770665 Free radical polymerization process  
A compound for effecting molecular weight control in polymerisation is a CoII chelate of formula, wherein each group R is an organic cyclic group which, independently, is a monovalent group which...
5767211 Synthesis of multi-functional hyperbranched polymers by polymerization of di-or tri-vinyl monomers in the presence of a chain transfer catalyst  
This invention concerns the synthesis of multi-functional hyperbranched polymers by free radical polymerization of di- or tri-vinyl monomers in the presence of a chain transfer catalyst and a...
Matches 451 - 500 out of 669 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 >