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Matches 501 - 550 out of 5,655

Document Document Title
WO2002060958A3
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...  
WO/2003/010214A1
An emulsion polymerization process for the preparation of polybutadiene grafted with styrene and acrylonitrile monomers in a reaction system is provided. The resultant product has a low end content of unreacted residual monomers, low yel...  
WO/2003/008470A1
The invention concerns a linear or branched diene elastomer having cyclic vinyl units. The inventive linear diene elastomer is derived at least from a conjugated diene, and comprises cyclic vinyl units in a weight proportion not less tha...  
WO/2002/102861A2
A process is described for the homo- and co-polymerization of conjugagted dienes characterized in that it is carried out in the presence of a catalytic system comprising a complex having general formula (II): Fe(L)n(X)s wherein n is an i...  
WO/2002/085952A2
The invention relates to polymers which are modified along a polymer chain on the basis of conjugated dienes or conjugated dienes and vinyl aromatic compounds having a proportion of vinyl aromatic compounds of up to 60 wt. %, a proportio...  
WO/2002/081082A1
A catalyst composition that is the combination or reaction product of ingredients including a halogen-containing iron compound or an iron-containing compound and a halogen-containing compound; a silyl phosphonate; and an organoaluminum c...  
WO/2002/079267A1
A process for the manufacture of a baleable lithium carboxylate polymer. The process includes polymerizing at least one conjudated diene in the presence of an organolithium initiator to a substantial completion. Thereafter, the polymeriz...  
WO/2002/077045A2
A process for producing polymer particles in a gas phase polymerization reaction using a group 4 metal complex containing delocalized $g(p)-electrons and optionally a flow aid.  
WO2002020623A9
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...  
WO2001004164A3
Organic compounds are hydrogenated in the presence of certain bis(pentadienyl) divalent Group IV metal complexes having pi -bound, neutral, conjugated diene ligands. These complexes are effective hydrogenation catalysts for polymers cont...  
WO/2002/068484A1
A continuous process for producing conjugated diene polymers comprising the steps of contacting, within an hydrocarbon solvent and within a continuous reactor, conjugated diene monomer and a catalyst composition prepared by combining: (a...  
WO/2002/066523A1
A catalyst composition that is the combination of or reaction product of ingredients that include an iron-containing compound, a silyl phosphonate, and an organoaluminum compound is provided. This composition can be used to catalyze the ...  
WO/2002/064648A1
Provided are polymers which have high Tg's and main chains of fluorinated alicyclic structures containing functional groups in such high concentrations that the functional groups can sufficiently exhibit their characteristics, and proces...  
WO2001068716A3
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...  
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...  

Matches 501 - 550 out of 5,655