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Matches 551 - 600 out of 5,583

Document Document Title
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/2000/006610A2
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?...  
WO/2000/006614A1
There is provided a catalyst containing a transition metal precursor having the formula (C¿5?R?1¿¿5?)TiY¿3?, (wherein each y is independently selected from the group consisting of a C¿1?-C¿20? alkoxide, a C¿1?-C¿20? amide, a C¿1...  
WO/2000/004064A1
Conjugated diolefins, optionally combined with other unsaturated compounds that may be copolymerized with diolefins, are polymerized by conducting polymerization of the diolefins in the presence of catalysts based on cobalt compounds, or...  
WO/2000/004063A1
Conjugated diolefins, optionally combined with other unsaturated compounds that may be copolymerized, are polymerized by conducting polymerization of the diolefins in the presence of catalysts based on monocyclopentadienyl vanadium compo...  
WO/2000/004080A1
Disclosed are microporous, open-celled polymeric foams formed by polymerizing a high internal phase water-in-oil emulsion comprising a continuous oil phase and discontinuous water phase where the foam has a Limiting Oxygen Index (LOI) va...  
WO/2000/004066A1
Conjugated diolefins, optionally combined with other unsaturated compounds that may be copolymerized with diolefins are polymerized by conducting polymerization of the diolefins in the presence of catalysts based on compounds of rare ear...  
WO/2000/002927A1
A process for producing a synthetic latex which comprises: introducing into a reactor a monomer and water in such a proportion that when the polymerization of the resultant composition is initiated at a given temperature and allowed to p...  
WO/1999/065955A1
A resin modifier comprising a conjugated diene homo- or copolymer in which the cis-bond units account for 40 % or more of the conjugated diene monomer units, the weight-average molecular weight (Mw) is 20,000 to 10,000,000, and the ratio...  
WO/1999/065953A1
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/1999/062913A1
Rare earth carboxylates in solid form are prepared or treated with a solubilizing agent to improve the solids solubility in aliphatic solvents. Other methods, such as treatment of the aliphatic solvent, to improve the solubility of solid...  
WO/1999/061484A1
A highly stable, aqueous emulsion of a (co)polymer which comprises as the main component at least one member selected among (meth)acrylic ester monomer units, styrene monomer units, and diene monomer units and has been dispersed and stab...  
WO/1999/060031A1
This invention relates to a process for making anionic di- and polyfunctional polymers using protected functional initiators, comprising the steps of: a) initiating polymerisation of one or more anionically polymerisable monomers with an...  
WO/1999/054335A1
Stable Rare Earth carboxylate liquids having high concentrations of Rare Earths and suitable for use in forming active Ziegler Natta catalysts, are prepared with stabilizing agents such as water and/or acid. The liquids comprise from abo...  
WO/1999/045034A1
A method of producing a diene-based rubber polymer by an emulsion polymerization which comprises starting the polymerization using a portion of the raw material and continuing the polymerization by adding the residue of the raw material ...  
WO/1999/042503A1
The invention relates to a method for the production of polydienes with regulated Mooney viscosity using catalysts based on rare earth compounds and characterized in that the charged conjugated dienes are polymerized in the presence of 0...  
WO/1999/042510A1
The present invention relates to cyclic polymers and their use in photolithographic applications. The cyclic polymers contain a pendant acid labile functional group and a functional group containing a protected hydroxyl moiety. The polym...  
WO/1999/040133A1
A butadiene polymer (i) having a cis bond unit content of at least 50% based on all butadiene units and a number-average molecular weight (M¿n?) of 1,000 to 10,000,000 and having living chains containing a transition metal in Group IV o...  
WO/1999/037698A1
A method for avoiding instabilities during gas phase polymerisation of rubber using difficultly volatile monomers, characterised in that the difficultly volatile monomers are supported on a particle shaped material and are incorporated i...  
WO/1999/037694A1
A catalyst system for gas phase polymerisation of conjugated dienes, consisting of a rare earth compound, an aluminium organic compound, another Lewis acid, optionally a conjugated diene, an inert inorganic or organic support and a co-ca...  

Matches 551 - 600 out of 5,583