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| Number | Title | Issue Date |
| 6544481 | Apparatus for the production of foamed material from a reaction mixture containing a dissolved foaming agent Reaction mixtures which form polyurethane foamed material, with production conditions which are varied during production, e.g. variation of the proportion of foaming agent, variation of the ratio of reaction components, variation of the throughput, or fin... | 04/08/2003 |
| 6531625 | Cinnamic esters In a novel process for the synthesis of cinnamic esters or substituted cinnamic esters, carboxylic esters are reacted, by condensation, with benzaldehyde or substituted benzaldehydes, respectively, in the presence of a solid with basic properties.... | 03/11/2003 |
| 6512126 | Process for preparing mint lactone Mint lactone can be prepared by hydrogenating hydroxymenthofurolactone to give the intermediate dihydrohydroxymenthofurolactone with the subsequent elimination of water.... | 01/28/2003 |
| 6506368 | Process for producing blue microcapsules The invention relates to a process for producing uniformly colored blue microcapsules, using oil-soluble dyes.... | 01/14/2003 |
| 6489520 | Process for the preparation of cis-2-tertiary-butylcyclohexanol by catalytic hydrogenation of 2-tertiary-butylphenol The present invention relates to a process for the preparation of cis-2-tertiary-butylcyclohexanol, where 2-tertiary-butylphenol is hydrogenated in the presence of a nickel/iron catalyst mixture and 2-tertiary-butylcyclohexyl acetate.... | 12/03/2002 |
| 6462203 | Process for the preparation of dihydrocoumarin by hydrogenating coumarin Dihydrocoumarin is prepared by hydrogenating coumarin in the presence of a palladium catalyst.... | 10/08/2002 |
| 6458972 | Process for the preparation of macrocyclic esters Macrocyclic ester compounds can be prepared from oligoesters by thermal cleavage in the presence of a thermostable benzene derivative.... | 10/01/2002 |
| 6451902 | Nitrile polymer vulcanizate and process for the production thereof A nitrite polymer vulcanizate having improved hot air aging characteristics is described. The nitrile polymer vulcanizate may be produced admixing a composition comprising: (i) a nitrite polymer; (ii) a filler; (iii) an additive selected from the group co... | 09/17/2002 |
| 6441242 | Process for the preparation of benzylacetone Benzylacetone can be prepared by hydrogenating benzylideneacetone in the presence of a palladium catalyst on activated carbon and/or a palladium catalyst on aluminum oxide.... | 08/27/2002 |
| 6429344 | Process for the preparation of d,I-menthol The invention relates to a process for the preparation of d,l-menthol by catalytic hydrogenation of compounds which have the carbon skeleton of menthane containing at least one double bond and are 3-substituted by oxygen and/or of menthone or isomenthone ... | 08/06/2002 |
| 6423659 | π-complex compounds π-complex compounds and in particular metallocene compounds of formula (Ia)(Ib), ##STR1## in which πI and πII represent π-systems, D designates a donor atom and A designates an acceptor atom, D and A being linked by a reversible coordinative bond... | 07/23/2002 |
| 6420489 | Polymer bromination process in solution An improved process is provided for the bromination of isoolefin-conjugated diolefin polymers by brominating said polymer in solution in selected halogen-containing hydrocarbons as solvent. There is also provided an improved product of said process wherei... | 07/16/2002 |
| 6420456 | Process for hydrophobicizing particles, and their use as fillers in polymer masterbatches Particles are hydrophobicized by treatment with a compound containing amino and silane groups, followed by treatment with a silane compound containing a hydrophobic group. The invention is particularly useful for treating hydrophilic mineral particles. Th... | 07/16/2002 |
| 6420334 | Tetracyclic acetals 2-Alkoxydecahydro-2,3a,4,4,7-pentamethyl-3,7a-methano-7aH-indeno[5,6-b]fura ns are valuable novel woody fragrances for the preparation of perfume oils.... | 07/16/2002 |
| 6414192 | Process for preparing 4-aminodiphenylamine The invention provides a process for preparing 4-aminodiphenylamine, an important starting product for synthesizing antioxidants and stabilizers in the rubber and polymer industry, by hydrogenating nitrosobenzene with hydrogen in the presence of a proton ... | 07/02/2002 |
| 6414098 | Catalyst system for olefin polymerization This invention relates to a catalyst system containing bisiminopyridyl complexes of cobalt and/or iron with bulky substituents on the bisiminopyridyl ligand, to a method for the polymerization of -olefins, particularly ethylene, and to the use of t... | 07/02/2002 |
| 6403747 | Process for preparation of butyl rubber using activated alkylaluminum halides A process for preparing a butyl polymer having a weight average molecular weight of at least about 400,000. The process comprises the step of contacting a C4 to C8 monoolefin monomers with a C4 to C14 multiolefi... | 06/11/2002 |
| 6403735 | Method for producing fulvene metal complexes The present invention relates to a process for the preparation of fulvene complexes, and their use as catalysts for the polymerization of unsaturated compounds.... | 06/11/2002 |
| 6399706 | Microgel-containing rubber compounds which comprise sulfur-containing organosilicon compounds The present invention relates to rubber compounds comprising at least one rubber which contains double bonds, at least one rubber gel, and at least one sulfur-containing organosilicon compound. Vulcanized materials which can be employed in particular for ... | 06/04/2002 |
| 6399810 | Process for the preparation of methyl cyclohexyl-propionate Methyl cyclohexyl-propionate is prepared by the hydrogenation of methyl cinnamate in the presence of a ruthenium and/or palladium catalyst.... | 06/04/2002 |
| 6399720 | Method for avoiding instabilities during gas phase polymerization of rubber The present invention relates to a process for the avoidance of instability during the gas polymerization of rubber comprising the feeding of low volatility monomers supported in a particulate material into a fluidized bed reactor.... | 06/04/2002 |
| 6395672 | Catalysts based on fulvene metal complexes This invention relates to a catalyst system based on fulvene metal complexes as well as their use for the polymerization of unsaturated compounds, in particular for the polymerization and copolymerization of olefins and/or dienes.... | 05/28/2002 |
| 6395260 | Topical cosmetic compositions comprising benzaldoximes Benzaldoximes having at least one aromatic hydroxyl or alkoxy group are effective constituents in topical cosmetic compositions, in particular, skin lightening compositions.... | 05/28/2002 |
| 6392107 | Process for isomerizing dichlorobutenes This invention relates to a process for isomerizing 1,4-dichloro-2-butene to yield 3,4-dichloro-1-butene or 3,4-dichloro-1-butene to yield 1,4-dichloro-2-butene, characterized in that the catalyst used comprises a compound of the formula CpFe(CO)2 | 05/21/2002 |
| 6392054 | 4-alkanoyl-3-thiazolines and their use as odorants and flavorings The present invention provides for novel 3-thiazolines comprising the formula ##STR1## where R1, R2 and R3 are identical or different and denote hydrogen or a lower alkyl, wherein said lower alkyl denotes an unbranched ... | 05/21/2002 |
| 6391365 | Use of 3,6-dimethyl-2(3H)-benzofuranone as flavor material and new process for its preparation 3,6-Dimethyl-2(3H)-benzofuranone is a new, valuable flavor material. A process for its industrial-scale preparation was developed.... | 05/21/2002 |
| 6387837 | Polymerization-initiating supported systems This invention relates to a process for the free-radical polymerization of monomers in gas phase or suspension processes using a supported, polymerization-initiating system comprising a) one or more polymerization-initiating components which initiate and ... | 05/14/2002 |
| 6384162 | Process for production of olefin polymer with long chain branching A process for production of an ethylene-propylene-diene-methylene (EPDM) tetrapolymer having long chain branching is described. The process comprises the step of polymerizing a monomer mixture comprising ethylene, propylene, a first diolefin monomer conta... | 05/07/2002 |
| 6380291 | Rubber compositions and method of making them Rubber compositions comprising an acrylate or methacrylate salt, an elastomer curable with a peroxide initiator and a plasticizer having one or more epoxide groups per molecule display lower compound Mooney viscosity, higher MH/modulus, increased hardness... | 04/30/2002 |
| 6372865 | Method and device for extracting rubber from gaseous phase polymerization The present invention relates to a process for the continuous discharge of pre-classified polymer particles, particularly rubber particles, from a gas phase polymerization reactor, comprising the steps of classifying the polymer in a classifier, dischargi... | 04/16/2002 |
| 6372857 | Microgel-containing rubber mixtures with masked bi-functional mercaptans and vulcanization products produced therefrom The invention relates to rubber mixtures of at least one rubber containing double bonds, at least one rubber gel and at least one masked bismercaptan, and to vulcanization products and rubber shaped articles produced therefrom. The vulcanization products ... | 04/16/2002 |
| 6365668 | Rubber compounds containing solution rubbers which contain carboxyl groups This invention is directed to rubber compounds which amongst other constituents contain fillers and contain solution rubbers which contain carboxyl groups, are particularly suitable for the production of highly reinforced rubber moldings, particularly for... | 04/02/2002 |
| 6359045 | Vulcanizable rubber compounds containing styrene-butadiene and butadiene rubbers This invention relates to vulcanizable rubber compounds based on styrene-butadiene rubber, which contain a special vulcanizing system, which are reinforced with silica and which contain a filler activator, for tire treads which exhibit improved abrasion-r... | 03/19/2002 |
| 6358036 | Device for the production of foam slabs of angular cross-section in a flock composite Angular blocks of foam flocks can be produced with angular edges and a homogeneous density distribution over the entire cross-section in a molding box by first extending the of adjacent mold walls before the flocks are introduced, and, after the flocks ha... | 03/19/2002 |
| 6353064 | Supported catalysts with a donor-acceptor interaction The present invention relates to compounds in which a transition metal is complexed with two ligand systems and the two systems are reversibly connected to one another by at least one bridge consisting of a donor and an acceptor. The resultant co-ordinati... | 03/05/2002 |
| 6350899 | Process for the esterification of unsaturated carboxylic acids with unsaturated alcohols with avoidance of blackening and precipitation The present invention provides a process for the esterification of unsaturated carboxylic acids with unsaturated alcohols, which is characterized in that esterification is performed in the presence of sterically hindered phenols and partially esterified p... | 02/26/2002 |
| 6350833 | Method for the suspension polymerization of conjugated dienes This invention relates to a method for the suspension polymerization of conjugated dienes in hydrocarbon mixtures comprising a fraction by volume greater than 80% of C4 hydrocarbons wherein polymerization is conducted in the presence of a rare ... | 02/26/2002 |
| 6346587 | Method for the production of partially fluorinated fluoropolymers The present invention relates to a process for the production of partially fluorinated fluoropolymers, in accordance with which fluoromonomers are free-radically polymerized in the presence of polyfluoropropanes or polyfluorobutanes of the formulae CF | 02/12/2002 |
| 6344527 | Method for the production of polydienes with regulated mooney viscosity This invention relates to a process for the production of polydienes having controlled Mooney viscosity, carried out by means of catalysts based on rare earth compounds, which is characterized in that the conjugated dienes used are polymerized in the pres... | 02/05/2002 |
| 6331655 | Process for the preparation of aromatic carbonyl compounds from styrenes The present invention relates to a novel process for the preparation of aromatic carbonyl compounds by oxidative cleavage of styrenes using lipases and hydrogen peroxide or hydrogen peroxide donors in the presence of carboxylic acids or carboxylic esters.... | 12/18/2001 |
