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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...
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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...
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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 ...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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 ...
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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...
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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: ...
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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.
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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 ...
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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...
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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...
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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...
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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...
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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.
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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...
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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...
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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.
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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...
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WO/2001/004164A2 |
Organic compounds are hydrogenated in the presence of certain bis(pentadienyl) divalent Group IV metal complexes having $g(p)-bound, neutral, conjugated diene ligands. These complexes are effective hydrogenation catalysts for polymers co...
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WO/2001/002446A1 |
The invention concerns a catalytic system based on rare earth and magnesium and its use for polymerising unsaturated compounds. The inventive catalytic system is characterised in that it comprises a compound consisting of the reaction pr...
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WO/2000/075207A1 |
The invention concerns a method for preparing polymers, which consists in contacting: an ethylenically unsaturated monomer; a source of free radicals; and a compound (I) or general formula (IA), wherein R?2¿ represents a group, a cycle ...
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WO/2000/075201A1 |
A catalyst composition that is the combination of or the reaction product of ingredients including a molybdenum-containing compound, a hydrogen phosphite, and an organoaluminum compound. This catalyst composition is useful for polymerizi...
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WO/2000/073315A1 |
The invention relates to a catalyst system on the basis of fulven compounds that are reacted with a transition metal compound in the presence of a reducing agent. They are then reacted with an element H-acidic compound. The invention fur...
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WO/2000/073385A1 |
A chloroprene latex composition which has a chloroprene polymer gel content of 3 to 40 wt. % and in which the sol has a weight-average molecular weight of 400,000 or higher. The chloroprene latex is excellent in initial adhesion performa...
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