Matches 251 - 300 out of 361 < 1 2 3 4 5 6 7 8 >
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5854299 Process for the polymerization of cyclic olefins and polymerizable composition  
Process for the polymerization of cyclic olefins by photochemical ring-opening metathesis polymerization by irradiation, using catalytic amounts of a heat-stable ruthenium or osmium catalyst which...
5849851 Romp of functionalized cyclic olefins using ruthenium and osmium carbene complexes  
Disclosed are ruthenium and osmium carbene compounds which are stable in the presence of a variety of functional groups and which can be used to catalyze olefin metathesis reactions on unstrained...
5847055 Polymer-containing catalyst systems  
A catalyst system of the formula I X M (Z 1 ) z s (Z 2 ) z s (Z 3 ) z s I where X is C 1 -C 10 -alkyl, 5- to 7-membered cycloalkyl, C 1 -C 10 -alkoxy, C 6 -C 15 -aryl or a compound of...
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...
5747618 Allene/alkyne copolymers  
The invention features linear copolymers prepared from mixtures of allenes and alkynes. The new copolymers have the formula: ##STR1## wherein R 1 through R 6 are, independently, H, an alkyl, an...
5741869 Addition polymers derived from norbornene-functional monomers and process therefor  
Addition polymers derived from norbornene-functional monomers are terminated with an olefinic moiety derived from a chain transfer agent selected from a compound having a terminal olefinic double...
5733988 Process for reducing polymer build-up in recycle lines and heat exchangers during polymerizations employing butadiene, isoprene, and/or styrene  
A method for inhibiting polymer build-up in a recycle line and a heat exchanger during a polymerization process of one or more alpha olefins, particularly sticky polymers, or of one or more...
5728480 Poly(4,5,9,10-tetrahydropyrene-2,7-diyl) derivatives and their use as electroluminescence materials  
Poly(4,5,9,10-tetrahydropyrene-2,7-diyl) derivatives of the formula (I) ##STR1## where the symbols R 1 to R 4 have the following meanings: R 1 , R 2 , R 3 , R 4 are identically or variously H, a...
5728917 Polymer depolymerization using ruthenium and osmium carbene complexes  
Disclosed are ruthenium and osmium carbene compounds which are stable in the presence of a variety of functional groups and which can be used to catalyze olefin metathesis reactions on unstrained...
5726249 Coating compositions with branched polymer  
In coating compositions based on a low molecular weight anhydride resin having pendant non-cyclic anhydride moieties, epoxy resin containing glycidyl methacrylate and catalyst, the use of branched...
5710298 Method of preparing ruthenium and osmium carbene complexes  
Methods of preparing carbene compounds of the formula ##STR1## are disclosed wherein M is Os or Ru; R and R 1 are independently selected from hydrogen and a functional group selected from the...
5708102 Living radical polymerization of vinyl monomers  
This invention relates generally to a living free radical polymerization of alkene monomers through use of persistent metal centered radicals to attain control of the propagation and termination...
5705503 Addition polymers of polycycloolefins containing functional substituents  
Addition polymers containing functionally substituted polycyclic repeat units are prepared in the presence of a single or multicomponent catalyst system containing a palladium metal ion source. The...
5677405 Homopolymers and copolymers of cationically polymerizable monomers and method of their preparation  
The invention discloses methods of preparing copolymers from norbornene-type monomers and cationically polymerizable monomers or polymers from catalytically polymerizable monomers by employing...
5670590 Energy polymerizable compositions, homopolymers and copolymers of oxazolines  
An energy polymerizable composition comprising at least one cationically curable 5 or 6 membered 1,3 oxazyl heterocyclic compounds, including 1,3-oxazoline and 1,3-oxazine monomers or compound and...
5565500 Cationically polymerizable mixtures containing selected metallocene complex salts as curing agents  
The invention relates to mixtures containing: a) a cationically polymerizable compound and b) a compound of the formula I [R 1 (Fe II R 2 ) a ] q ♁an anX .crclbar .q (I) in which a is...
5548048 Process for manufacturing alkyl-substituted poly (2,2'-diyl) bipyridine-5,5'-diyl  
A process for manufacturing a polymer composed of an alkyl substituted poly(2,2'-bipyridine-5,5'-diyl) having a chemical formula which is at least one of: ##STR1## wherein R and R' are H or an...
5525688 Highly active π-allynickel-based polymerization initiators  
A π-allylnickel/counterion complex is reacted with a hologenated ketone to produce a highly active polymerization initiator.
5468819 Process for making polymers containing a norbornene repeating unit by addition polymerization using an organo (nickel or palladium) complex  
A single component ionic catalyst consists essentially of an organonickel complex cation, and a weakly coordinating neutral counteranion. The cation is a neutral bidentate ligand removably attached...
5444134 Process for producing olefin based polymers and olefin polymerization catalyst  
Olefin polymerization is carried out in the presence of a catalyst comprising, as main components, the following Compounds (A) and (B): (A) a transition metal compound containing a transition...
5412046 Polyethylene and method of production thereof  
A polyethylene, having 1 to 60 methyl branches and 1 to 60 hexyl or higher branches per 1000 carbon atoms, a g-value of 0.5 to 0.8, and a limiting viscosity [η] of 0.005 to 20.0 dl/g as measured...
5395811 Highly active π-allylnickel-based polymerization initiators  
A π-allylnickel/counterion complex is reacted with a halogenated ketone to product a highly active polymerization initiator.
5391662 Nickel catalyst active in ethylene homo and copolymerization  
A catalyst active in the preparation of ethylene homo and copolymers consists of a nickel complex bound to a polystyrene support and definable by the general formula (I): ##STR1## in which Ph, m...
5371259 Iron (II) metallocene salts  
Compounds of the formula I are described [R 1 (Fe II R 2 a ] q +an anX -q (I) in which a is 1 or 2, n is 1 or 2, R 1 is a substituted or unsubstituted π-arene, R 2 is a substituted or...
5359017 Cationically polymerizable organic material compositions and method for the stabilization thereof  
The present invention provides a cationically polymerizable organic material composition comprising a composition which contains a cationic polymerization catalyst(s) and a cationically...
5344900 Process for producing a norbornene polymer  
A process for producing a norbornene polymer consisting essentially of a repeating unit of the formula (I) ##STR1## wherein R 1 to R 12 are the same or different and are hydrogen, C 1 -C 20 ...
5342909 Ruthenium and osmium metal carbene complexes for olefin metathesis polymerization  
Processes for the synthesis of several new carbene compounds of ruthenium and osmium are provided. These novel complexes function as stable, well-defined catalysts for the metathesis polymerization...
5324879 Oligomerization process  
Oligomers are produced from unsaturated monomers. They contain terminal unsaturation and have a degree of polymerization of from 2 to 200. These oligomers are produced by the free radical...
5322910 Ethylene polymerization  
Olefins are polymerized with a catalyst system composition comprising a nickel compound and an aromatic carboxylic acid wherein there is a heteroatom linkage between the aromatic moiety and the...
5244992 Poly(iso)quinolinediyls and preparation and use thereof  
An (iso)quinolinediyl polymer having a degree of polymerization of at least 5 is produced from an (iso)quinoline dihalide by a reaction with a zero-valent nickel compound, or an electrolytic...
5216083 Polymerization of cis-5,6-bis(trimethylsiloxy)-1,3-cyclohexadiene and other substituted cyclohexadienes  
The monomer cis-5,6-bis(trimethylsiloxy)-1,3-cyclohexadiene can be polymerized with certain catalysts, such as bis(allyltrifluoroacetato nickel (II)) and bis(allylpentafluorophenoxy nickel II). The...
5204415 Polymers prepared from dipropargyl ether of alpha, alpha'-bis (4-hydroxyphenyl)-para-diisopropylbenzene  
Novel dipropargyl ether of alpha, alpha'-bis(4-hydroxyphenyl)-para-diisopropylbenzene is useful in preparing resins having desirable properties as laminates and the like.
5089536 Energy polmerizable compositions containing organometallic initiators  
An energy polymerizable composition and process therefore, comprising a cationically polymerizable material and a catalytically effective amount of an ionic salt of an organometallic complex cation...
5086086 Energy-induced curable compositions  
A polymerizable composition comprises a polymeric precursor selected from the group consisting of 1) at least one ethylenically-unsaturated monomer, 2) at least one epoxy monomer, and 3)...
5066741 Process for preparation of syndiotactic vinyl aromatic polymers  
A process for preparing syndiotactic vinyl aromatic polymers comprising contacting one or more aromatic monomers under polymerization conditions with a catalyst corresponding to the formula: [Cp...
5035997 Redox polymerization diagnostic test composition and method for immunoassay and nuclei acid assay  
A diagnostic test composition for detecting and measuring an analyte possessing biologic activity, the composition comprising (a) A redox catalyst system capable of converting a monomer to a...
5019496 Photopolymerization diagnostic test composition and method for immunoassay and nucleic acid assay  
A diagnostic test composition for detecting and measuring an analyte possessing biologic activity comprising (a) a photocatalyst system capable of converting a monomer to a polymer upon exposure...
4957946 Cationically polymerizable mixtures containing metallocene complex salt of certain carboxylic or suffonic acids  
The invention relates to mixtures containing: (a) cationically polymerizable compound and (b) a compound of the formula I [R 1 (FE II R 2 ) a ] q ♁an an X .crclbar .(I) in which a is 1...
4945141 Ring opening metathesis polymerization of strained cyclic ethers  
A process is provided for the polymerization of 7-oxanorbornene and its derivatives. The process involves the ring opening metathesis of 7-oxanorbornene and its derivatives, preferably using water...
4945144 Ring opening methathesis polymerization of strained cyclic ethers  
A process is provided for the polymerization of 7-oxanorbornene and its derivatives. The process involves the ring opening metathesis of 7-oxanorbornene and its derivatives, preferably using water...
4746713 Bimetallic catalytic chain transfer agents for molecular weight control in free radical polymerization  
A process for controlling the molecular weight of polymer and copolymer in radical initiated polymerization with a bimetallic catalytic chain transfer agent is disclosed.
4724273 Process for preparing alpha-olefin polymers and oligomers  
The invention relates to polymers and oligomers characterized in that they have been prepared from α-olefin monomers or mixtures thereof and the distances between the methyl branching points are...
4722984 Pentacyanocobaltate(II) catalytic chain transfer agents for molecular weight control in free radical polymerization  
A process for preparing low molecular weight methacrylate polymer and copolymer with a pentacyanocobaltate(II) catalytic chain transfer agent is disclosed.
4716205 Nickel-catalyzed polymerization of ethylene  
Preparation of polyethylene in the presence of selected nickel-containing catalysts.
4707538 Polyamide preparation with pentaamine cobalt (III) complex catalyst  
A polyamide is produced by polymerizing at least one of an alpha, beta-unsaturated carboxylic acid and ammonia, an ammonium salt of an alpha, beta-unsaturated carboxylic acid, an alpha,...
4691036 Organic nickel compounds, the production thereof and the use thereof as polymerization catalysts  
Nickel compounds which can be produced by reacting a nickel(O) compound or a nickel compound, which can be converted in situ into a nickel(O) compound, with an adduct or a mixture of maleic acid...
4575544 Ferricenium salt catalysts for vinyl ethers  
A curable composition of a vinyl ether resin and at least one ferricenium salt of the formula: ##STR1## where R 1 , R 2 , R 3 and R 4 are the same or different H or alkyl groups or a linkage to a...
4537982 Production of organic nickel compounds  
Nickel-compounds, producible by reaction of Nickel-(O)-compound or a compound convertible thereto in situ with two different compounds corresponding to the following formulae ##STR1## are useful as...
4530879 Radiation activated addition reaction  
A process for the addition of compounds containing silicon-bonded hydrogen to compounds containing aliphatic unsaturation. The process is activated by actinic radiation and is conducted in the...
4525553 Acrylic polymerization catalysts containing ferricenium salts  
Ferricenium salts of the formula: ##STR1## where R 1 , R 2 , R 3 and R 4 are the same or different H or alkyl groups or a linkage to a polymeric backbone: M is a metal or metalloid; X is a halide...
Matches 251 - 300 out of 361 < 1 2 3 4 5 6 7 8 >