Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 601 - 650 out of 5,642

Document Document Title
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...  
WO/1999/037697A1
An aqueous composition that includes (A) a butadiene polymer latex that is prepared by an emulsion polymerization in the presence of a styrene sulfonate stabilizer and (B) a phenolic resin. A preferred aqueous butadiene polymer latex is ...  
WO/1999/037696A1
Polymerization inhibitor compositions for the emulsion polymerization of chloroprene comprise a 4-(lower alkoxy)phenol and a hindered bis(phenol)methane in a molar ratio in the range of 0.5/1-2.5/1. Discoloration resistant polychloropren...  
WO/1999/037695A1
A method for producing a catalyst system consisting of a rare earth compound, an aluminium organic compound, another Lewis acid, optionally a conjugated diene and an inert inorganic or organic support material. According to said method, ...  
WO/1999/029747A1
A butadiene polymer in which cis-configuration units resulting from a conjugated diene whose main skeleton has four carbon atoms account for at least 50 % of the whole of the units and which has an Mw/Mn ratio of 1.9 or below and an Mw v...  
WO/1999/024481A1
The invention relates to a continuous method for producing slightly gelified diene rubber, through anionic polymerisation or copolymerisation of a diene and, optionally, of a vinyl aromatic compound, in a tubular reactor. The method is c...  
WO/1999/020665A1
A process is provided for preparing polymer compositions which are multimodal in nature. The process involves contacting, under polymerization conditions, a selected addition polymerizable monomer with a metallocene catalyst having two o...  
WO/1999/020670A1
The invention relates to novel catalysts with a base consisting of compounds of the rare earth metals, comprising a compound of the rare earth metals, a cyclopentadiene and an aluminium oxane. The invention also relates to the use of the...  
WO1999006448A8
The invention concerns a catalyst system based on fulvene metal complexes (metallocene), which have been activated with a Lewis acid free from aluminoxan and boron, and its use for polymerising unsaturated compounds, in particular for po...  
WO/1999/012980A1
A catalyst comprising an organoaluminum compound and a vanadium chelate compound having the ability to cause olefins to undergo living coordination polymerization is contacted with a terminal diolefin to obtain a catalyst for living poly...  
WO/1999/012979A1
Initiator compositions capable of imparting improved thermal stability of living polymerization chain ends and processes of using the same. The compositions include an alkyllithium initiator and a silyl ether. The silyl ether can be inco...  
WO/1999/011674A1
The invention relates to a method for producing particulate polymers P by radically initiated aqueous emulsion polymerization, wherein at least one ethylenically unsaturated monomer is emulsified by means of a dispersing agent in an aque...  
WO/1999/010421A1
The invention includes a process of preparing a coupled polymer comprising heating an admixture containing (1) at least one interpolymer of an alpha-olefin and vinyl aromatic monomer and (2) a coupling amount of at least one poly(sulfony...  
WO/1999/010423A1
The present invention includes a process of preparing a coupled polymer by heating an admixture containing (1) at least one elastomer comprising ethylene and at least one comonomer which is selected from alpha olefins having at least 3 c...  
WO/1999/010415A1
A process of reacting a poly(sulfonyl azide) with a polymer comprising steps (a) forming a first admixture, hereinafter referred to as a concentrate, of a first amount of a first polymer or in a liquid which does not require removal from...  
WO/1999/010422A1
The invention includes a process of preparing a coupled polymer characterized by heating an admixture containing (1) at least one ethylene polymer or blend of ethylene polymers having a density of at least 0.89 g/mL and less than 0.935 g...  
WO/1999/010427A1
The invention includes a process of preparing a coupled polymer comprising heating an admixture containing: 1) at least one polyolefin comprising ethylene and at least one comonomer which is selected from alpha olefins having at least 3 ...  
WO1998056836A3  
WO/1999/009077A1
This invention relates to the controlled molecular weight production of macromonomers and polymers with terminal conjugated double bonds from starting monomers including, but not limited to, substituted butadienes. The terminal diene end...  
WO/1999/007745A1
There is provided a process for producing polydienes, such as polybutadiene and polyisoprene, in a gas phase fluidized bed reactor using a pre-activated nickel catalyst which is highly active for cost effective production of these dienes...  
WO/1999/006448A1
The invention concerns a catalyst system based on fulvene metal complexes (metallocene), which have been activated with a Lewis acid free from aluminoxan and boron, and its use for polymerising unsaturated compounds, in particular for po...  
WO/1999/003901A1
A process is provided for low bed level polymerization, using sound waves to prevent reactor fouling and/or sheeting. The process is useful during reactor start-up, polymer product transitioning, and for polymer residence time control in...  
WO/1998/058972A1
A novel series of copolymers and terpolymers, useful as base oils for synthetic lubricants, are produced by polymerization of ethylene, an alpha-olefin, and optionally a third monomer comprising an alpha-olefin of 3 to 20 carbon atoms, i...  
WO/1998/056836A2
The invention relates to electrets produced on the basis of cycloolefin copolymers (COC) and characterized by long-term stability of the charges applied thereto, even at high temperatures and high relative air humidity. Cycloolefin copol...  
WO/1998/055517A1
The invention relates to a process for making functionalized polymers, comprising the steps of: initiating polymerization of one or more unsaturated monomers with an initiator having structure (1), wherein R?1�, R?2� and R?3� are i...  
WO/1998/052984A1
The invention relates to a method for anionic polymerisation of dienes or of dienes and vinyl aromatic monomers in a vinyl aromatic monomer or mixture of monomers to form homopolydienes or copolymers or mixed homopolydienes and copolymer...  
WO/1998/051714A1
A new shortstopping agent for use in stopping free radical polymerizations is N-ethylhydroxylamine or salts thereof (EHA). It is as effective as related hydroxylamines, but is much less volatile so that it tends to remain with the polyme...  
WO1998039369A3  
WO/1998/048913A1
The present invention describes a chromatographic method for separating polynucleotides with improved separation and efficiency. The method uses nonporous polymeric beads having a non-reactive, non-polar surface, and made from a variety ...  
WO/1998/039283A1
A process for producing solid, powdery carboxylates of Rare Earths (RE) elements, among them mainly Nd, La, Pr and Ce, where the ligands coordinated to the metal are long-chain, branched carboxylic acids is provided. Preferably, the carb...  
WO/1998/039369A2
The invention relates to half-sandwich metallocene catalysts of formula (I) and their use for stereospecific polymerization or copolymerization of an olefin of the formula R?a�CH=CHR?b� wherein R?a� and R?b� can be hydrogen, an u...  
WO/1998/036004A1
The present invention relates to a novel catalyst system, the use thereof in the polymerization of dienes in a solution, suspension and vapour phase, and the use of diene rubbers produced therewith, exhibiting a high cis content, an aver...  
WO1998030587A3  
WO/1998/033830A1
$g(a)-olefin-cycloolefin copolymers which (1) consist essentially of 0-31 % by mole of an $g(a)-olefin component represented by formula (A) wherein R?1� is a hydrogen atom or a saturated aliphatic hydrocarbon group of 1-16 carbon atoms...  
WO/1998/031739A1
A process for preparation of a microgel comprising reacting an alkoxyamine with an unsaturated monomer composition comprising a cross-linking agent comprising at least two double bonds and optionally one or more further monomers selected...  
WO1998007765A3
A continuous anionic polymerisation or copolymerisation process of styrene or diene monomers with alkali metal alkyl as polymerisation initiator is carried out in the presence of a metal alkyl or aryl of an at least bivalent element as r...  
WO/1998/030587A2
Supported metal halides and metal halide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated wat...  
WO/1998/030520A1
Metal oxide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer (e.g., styrene based monomers), C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated w...  

Matches 601 - 650 out of 5,642