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Matches 551 - 600 out of 5,655

Document Document Title
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...  
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...  
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...  
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 ...  
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...  
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...  
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...  
WO/2000/071593A1
The invention relates to a method of polymerizing dienes in a solvent that contains vinyl-aromatic monomers. Said polymerization is carried out in the presence of an organometallic compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as the ca...  
WO/2000/069928A2
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/2000/069927A1
The present invention is related to a bimodal rubber characterized in that the bimodal rubber is a composition of linear, and branched rubber molecules, and has a broad, yet monomodal Mw distribution and rubber modified polymers produced...  
WO/2000/068283A1
A process for producing a synthetic rubber consisting mainly of butadiene units through emulsion polymerization, which comprises adding, in the course of polymerization, an electrolyte capable of coagulating rubber latex particles to the...  
WO/2000/068311A1
The invention relates to rubber mixtures containing diene rubbers which contain 0.1 - 2 wt. % primary hydroxyl groups and have a glass transition temperature of -120 to -50 °C. The invention also relates to mixtures comprising filling m...  
WO/2000/068284A1
Process for the preparation of sulphur-modified polychloroprene, in alkaline aqueous emulsion and in the presence of radical initiator, characterized in that one or more organic polysulphides are added to the reaction mixture, these orga...  
WO/2000/064948A1
The present invention relates to a method of anionically polymerizing monomers by contacting the monomers with a monofunctional anionic polymerization initiator which is an organo-substituted alkali metal compound other than a silicon-ba...  
WO/2000/063256A1
There is disclosed a method for preparing a silyl-functional living cationic polymer which can be subsequently coupled to form a moisture-curable telechelic system, said method comprising reacting, in the presence of a Lewis acid, (A) at...  
WO/2000/053643A1
A catalyst composition which is solid at room temperature comprises a transition metal or transition metal compound having on average more than one ligand co-ordinated thereto, each ligand being supported by a support via a divalent grou...  
WO/2000/050479A1
Novel protected amine anionic polymerization initiators useful in the preparation of polymers having a protected amine functional group. The initiators are very soluble in hydrocarbon solvents.  
WO/2000/050468A1
The invention relates to a polymerization initiator containing an alkaline-earth metal compound selected from the group: a) of the heteroleptic alkaline-earth metal compounds of formula (I) L - M - R or; b) of the cationic alkaline-earth...  
WO/2000/050478A1
Novel formulations of alkyllithium species having improved thermal stability are provided. The compositions include one or more alkyllithium compounds and one or more additives. Exemplary additives include silyl ethers, germane ethers, t...  
WO2000006610A3
A method for producing a polymeric material, said method comprising subjecting a starting material which includes two multiple bonds which are activated so that they will take part in a polymerisation reaction and wherein the multiple bo...  
WO2000006533B1
A compound of formula (I) where R<1> is CH and R<6> is a bond, or R<1> and R<6> together form an electron withdrawing group; R<2> and R<3> are independently selected from (CR<7>R<8>)n, or a group CR<9>R<10>, -(CR<7>R<8>CR<9>R<10>)- or -(...  
WO/2000/034348A1
Cationic polymerization initiators of formula (I) are disclosed. The acyl sulfonium salts of the present invention differ from known acyl sulfonium initiators in that the substituents R?2¿ and R?3¿ on the sulfur are larger and more com...  
WO2000006533A3
A compound of formula (I) where R<1> is CH and R<6> is a bond, or R<1> and R<6> together form an electron withdrawing group; R<2> and R<3> are independently selected from (CR<7>R<8>)n, or a group CR<9>R<10>, -(CR<7>R<8>CR<9>R<10>)- or -(...  
WO/2000/032654A1
There is disclosed a method for preparing a silyl-functional living cationic polymer which can be subsequently coupled to form a moisture-curable telechelic system, said method comprising reacting, in the presence of a Lewis acid, (A) at...  
WO/2000/032689A1
A rubber composition for a tire tread exhibiting high friction force on ice, which comprises a diene rubber, a carbon black and/or silica and a thermoplastic resin having a gas encapsulated therein, and optionally, further comprises shor...  
WO/2000/031183A1
A suitable cross-linkable matrix precursor and a poragen can be treated to form a porous cross-linked matrix having a T¿g? of greater than 300 °C. The porous matrix material has a lower dielectric constant than the corresponding non-po...  
WO/2000/029452A1
A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a flui...  
WO/2000/026265A1
The invention concerns a polymerisation method by dielectric heating of unsaturated fatty acids, unsaturated fatty acid esters, unsaturated hydrocarbons, or unsaturated derivatives of said products, and the resulting polymers and uses of...  
WO/2000/022004A1
This invention concerns a process for making a dilithium initiator which comprises mixing together a di(1-{alkyl or aryl}ethylene)arene compound and diethylether and then adding the mixture to (a) a secondary lithium alkyl and/or (b) a t...  
WO/2000/018812A1
The present invention relates to a catalyst component comprising a compound of a metal selected from the group consisting of Co, Ni and rare earth elements supported on a polymer having a porosity (mercury) higher than 0.02 cm?3¿/g. The...  
WO1999065953A9
There is provided a post-reactor process for a polymer, especially an elastomeric polymer, prepared by a gas phase polymerization in the presence of an inert particulate material comprising: introducing the polymer containing inert parti...  
WO/2000/017246A1
The invention relates to a method for the anionic polymerisation of dienes in a solvent in the form of an aliphatic, isocyclic or aromatic hydrocarbon or hydrocarbon mixture, in the presence of an organic lithium polymerisation initiator...  
WO/2000/014130A1
A process for the production of cis-1,4-polybutadiene having a low level of gel content is described. The process comprises polymerizing 1,3-butadiene in the presence of a catalyst and a polymerization diluent. The polymerization diluent...  
WO/2000/009514A1
Compositions comprising: A) an aluminum compound corresponding to the formula AIAr?f¿¿3?, where Ar?f¿ is a fluorinated aromatic hydrocarbyl moiety of from 6 to 30 carbon atoms; B) an aluminum compound corresponding to the formula: AIA...  
WO/2000/008069A1
This invention relates to a process for selectively hydrogenating the unsaturated double bonds of conjugated diene units of a homopolymer or copolymer. By using a highly active novel homogeneous organo titanium catalyst represented by fo...  
WO/2000/006610A2
A method for producing a polymeric material, said method comprising subjecting a starting material which includes two multiple bonds which are activated so that they will take part in a polymerisation reaction and wherein the multiple bo...  
WO/2000/006533A2
A compound of formula (I) where R?1¿ is CH and R?6¿ is a bond, or R?1¿ and R?6¿ together form an electron withdrawing group; R?2¿ and R?3¿ are independently selected from (CR?7¿R?8¿)¿n?, or a group CR?9¿R?10¿, -(CR?7¿R?8¿CR?...  

Matches 551 - 600 out of 5,655