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Matches 501 - 550 out of 5,605

Document Document Title
WO2002028933A3
A polymer composition includes at least two end segments that make up less than 15 % of the total polymer composition. Each end segment has a vinyl content greater than about 45 %. However, the vinyl content is less than about 35 % throu...  
WO/2002/062860A1
The invention relates to a continuous method for producing elastomers on the basis of conjugated dienes or on the basis of conjugated dienes and vinyl-aromatic compounds or on the basis of alkenes. The polymerization proceeds in the reac...  
WO/2002/060958A2
The present invention provides functionalized electrophiles, their analogous initiators, and processes for preparing these compounds. The present invention also relates to homotelechelic, heterotelechelic, and radial functional polydiene...  
WO2002030997A3
A catalyst system suitable for use in the production of high cis polybutadiene is disclosed. The catalyst system includes a cobalt salt of the formula CoAx, where A is a monovalent or divalent anion and x is 1 or 2; an alkyl aluminum chl...  
WO/2002/050139A1
Butene oligomer derivatives carrying tert-butyl groups as one of the terminal groups, having a repeating unit of the main hydrocarbon chain consisting of 80% by mol or more of CH¿2?C(CH¿3?)¿2?-, and carrying the other terminal groups ...  
WO2002020629A3
The invention relates to the use of novel catalysts containing a metal-free cyclopentadienide compound and a transition metal compound for the polymerisation of unsaturated compounds, particularly conjugated dienes. The use of methyl alu...  
WO2001038408A3
The invention relates to a method for producing polymers on the basis of 1,3 dienes by radical polymerization of cyclodextrin-complexed 1,3 dienes and optionally further unsaturated monomers which can optionally also be cyclodextrin-comp...  
WO/2002/048218A1
The invention concerns a method for obtaining a polyisoprene having a high cis-1,4 chaining, from an isoprene-enriched C5 cut derived from steam cracking of naphta. The inventive method essentially consists in reacting a catalytic system...  
WO2001092346A3
A catalyst composition for the polymerization of olefins is provided, comprising a cyclopentadienyl transition metal catalyst precursor and an activating co-catalyst.  
WO/2002/038615A1
A functionalized polymer prepared by a process comprising the steps of preparing a pseudo-living polymer by polymerizing conjugatd monomer with a lanthanide-based catalyst, and reacting the pseudo-living polymer with a functionalizing ag...  
WO/2002/034722A1
New 1,2,3- or 1,2,3,4- or 1,2,3,4,5- substituted imidazolium salts and their uses as solvent in catalysed organic reactions, as well as compositions containing them and a transition metal compound. They can be used in the following react...  
WO/2002/030997A2
A catalyst system suitable for use in the production of high cis polybutadiene is disclosed. The catalyst system includes a cobalt salt of the formula CoA¿x?, where A is a monovalent or divalent anion and x is 1 or 2; an alkyl aluminum ...  
WO/2002/028933A2
A polymer composition includes at least two end segments that make up less than 15 % of the total polymer composition. Each end segment has a vinyl content greater than about 45 %. However, the vinyl content is less than about 35 % throu...  
WO/2002/028920A1
Disclosed herein are methods for producing a polymer. One polymerizes monomers selected from alkene monomers and terminal alkyne monomers, in the presence of a catalyst which is a silylene. The catalyst can be a heterocyclic amido silyle...  
WO/2002/028776A1
The additive compound of a carboxylic acid and a halide or of a rare earth or gallium halogenocarboxylate of the same acid is obtained by a method which consists in reacting with HX, X representing a halogen, and in a solvent selected am...  
WO/2002/024825A1
The invention relates to an adhesive composition based on polychloroprene dispersions and having improved adhesive properties, a method for the production of said composition, and the use thereof as a contact adhesive for inorganic and o...  
WO/2002/024764A1
Anionic polymerization initiators usful in the preparation of polymers having a protected amine functional group. The amine functionality includes a first protecting group, which can be aralkyl, methyl, allyl or tertiary alkyl group. The...  
WO2001096425A3
A butadiene-type polymer suitable for use as a processing aid in a rubber composition is formed by polymerizing butadiene or other conjugated diene monomers in a solvent, such as hexane, to form a polymer of relatively low molecular weig...  
WO/2002/020623A1
The invention concerns a method for preparing a dilithium initiator for use in anionic polymerisation, a method for preparing by anionic polymerisation a living diene elastomer provided with a carbon-lithium group at each of its chain en...  
WO/2002/020629A2
The invention relates to the use of novel catalysts containing a metal-free cyclopentadienide compound and a transition metal compound for the polymerisation of unsaturated compounds, particularly conjugated dienes. The use of methyl alu...  
WO2001079470A3
A catalyst composition that is the combination of or the reaction product of ingredients including (a) a molybdenum-containing compound, (b) a hydrogen phosphite, and (c) a blend of two or more sterically distinct organoaluminum compound...  
WO/2002/008300A1
The invention relates to an improved method for producing di- or tri-functional lithium based initiator systems and the use thereof for the polymerisation of conjugated dienes, especially for the copolymerisation of conjugated dienes wit...  
WO/2002/008299A1
The present invention provides protected functionalized polymerization initiators having less than one molar equivalent chain extension agent introduced therein to provide hydrocarbon solubility.  
WO2000069928A3
A process for polymerizing 1,3-butadiene into a low molecular weight high-cis polybutadiene is described using a catalyst system comprising: (a) a neodymium-containing compound, (b) an aluminoxane or a trialkyl aluminum compound, (c) an ...  
WO/2002/004559A1
An aromatic vinyl resin composition comprising: (A) 5 to 40 wt.% graft copolymer which is obtained by polymerizing (a4) 60 to 15 parts by weight of a vinyl monomer in the presence of 40 to 85 parts by weight of rubber particles (the sum ...  
WO/2001/096425A2
A butadiene-type polymer suitable for use as a processing aid in a rubber composition is formed by polymerizing butadiene or other conjugated diene monomers in a solvent, such as hexane, to form a polymer of relatively low molecular weig...  
WO/2001/094354A1
The invention relates to solutions of lithium pyrrolidine in a mixture consisting of tetrahydrofuran (THF) and of hydrocarbons, whereby the lithium pyrrolidine concentration ranges from 2 to 30 wt. %, and the molar ratio Li pyrrolidine: ...  
WO/2001/092346A2
A catalyst composition for the polymerization of olefins is provided, comprising a cyclopentadienyl transition metal catalyst precursor and an activating co-catalyst.  
WO/2001/087991A1
A catalyst component which is particularly suitable for the preparation of polydienes showing enhanced catalytic activity and solubility in hydrocarbon media is obtained by reacting a Nd trihalide with Mg diallyl compounds of formula MgA...  
WO2001034669A8
A catalyst composition that is the combination or reaction product of ingredients including an iron-containing compound, a hydrogen phosphite, and an aluminoxane can be used in the polymerization of conjugated diene monomers.  
WO/2001/079470A2
A catalyst composition that is the combination of or the reaction product of ingredients including (a) a molybdenum-containing compound, (b) a hydrogen phosphite, and (c) a blend of two or more sterically distinct organoaluminum compound...  
WO/2001/070821A1
A continuous process for making a polymer including branched and linear components includes first polymerizing conjugated diene(s) in the presence of an organometallic initiator to a conversion of at least 90%. A coupling agent is added ...  
WO/2001/070835A1
The invention relates to a method for producing caoutchouc particles (K) by means of emulsion polymerisation in the presence of an emulsifier and a polymerisation initiator. Said particles contain A) 80 to 100 wt. % of one or more conjug...  
WO/2001/068716A2
The invention is related to a novel compound represented by NdHA4 wherein A is a carboxylate, and to a diene polymerization catalyst using the novel compound. NdHA4 has monomeric structure and does not contain water, bases and salts. NdH...  
WO/2001/064758A1
A polymerization initiator solution which comprises a dilithium polymerization initiator wherein the number of functional groups is 1.8 to 2.0 per molecule on the average and a solvent selected among aliphatic hydrocarbon compounds and a...  
WO/2001/049754A1
A catalyst composition that is the combination of or the reaction product of ingredients including an iron-containing compound, a hydrogen phosphite, and a mixture of two or more organoaluminum compounds. This catalyst composition is par...  
WO/2001/049763A1
Blends of syndiotactic 1,2-polybutadiene and rubbery elastomers are prepared by a process that comprises polymerizing 1,3-butadiene monomer into syndiotactic 1,2-polybutadiene within a rubber cement of at least one rubbery elastomer by u...  
WO/2001/049755A1
A catalyst composition that is the combination of or the reaction product of ingredients including an iron-containing compound, an organomagnesium compound, and a cyclic hydrogen phosphite. This catalyst composition is particularly usefu...  
WO/2001/049753A1
A process for preparing conjugated diene polymers by polymerizingconjugated diene monomers in the presence of a catalyst composition that is formed by combining an iron-containing compound, a hydrogen phosphite, and an organoaluminum com...  
WO/2001/046268A1
A process for producing a synthetic diene rubber which comprises: adding an electrolyte capable of coagulating rubber latex particles to a polymerization system during emulsion polymerization at the time when the conversion into polymer ...  
WO/2001/042315A1
Group 4 metal complexes of the constrained geometry type, catalysts derived therefrom and polymerization processes using the same, characterized by a nitrogen containing aliphatic or cycloaliphatic moiety that is substituted with one or ...  
WO/2001/038408A2
The invention relates to a method for producing polymers on the basis of 1,3 dienes by radical polymerization of cyclodextrin-complexed 1,3 dienes and optionally further unsaturated monomers which can optionally also be cyclodextrin-comp...  
WO/2001/036494A1
The invention relates to a method for carrying out the anionic polymerization of vinyl aromatic monomers or dienes in the presence of a lithium organyl or lithium alcoholate and a magnesium compound or an aluminum compound, whereby a ste...  
WO/2001/036497A1
The invention is directed to organometallic catalysts prepared by a process comprising a) combining nucleophilic group-containing particulate support material with an arylboron or arylaluminum Lewis acid compound in the presence of a Lew...  
WO/2001/034659A1
A method for preparing a functionalized polymer comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyts, and reacting the pseudo-living polymer with at least one...  
WO/2001/034669A1
A catalyst composition that is the combination or reaction product of ingredients including an iron-containing compound, a hydrogen phosphite, and an aluminoxane can be used in the polymerization of conjugated diene monomers.  
WO/2001/034658A1
A method for preparing a functionalized polymer comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst, and reacting the pseudo-living polymer with at least one...  
WO/2001/032724A1
A catalyst composition that is formed by combining (a)(i) an iron compound and a halogen-containing compound or (ii) a halogen-containing iron compound, (b) a hydrogen phosphite, and (c) an organoaluminum compound. This catalyst composit...  
WO/2001/030858A1
An olefin polymerization pre-catalyst and a method for preparing an activated olefin polymerization catalyst composition from the pre-catalyst are disclosed in formula (I): wherein M, R?1¿, R?2¿, R?3¿ and R?4¿ are defined herein.  
WO/2001/010917A1
Disclosed is a method for the production of a solution of high molecular polymers of conjugated dienes in a vinyl aromatic hydrocarbon by anionic polymerisation of said diene in the presence of an alkyl lithium catalyst. The invention al...  

Matches 501 - 550 out of 5,605