Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7851577 | Polymerization process using zinc halide initiators A cationic polymerization process for isoolefins using a zinc halide initiator. The zinc halide initiator is added to a solution of the isoolefin in a suitable solvent, preferably a halocarbon solvent. Polymerization reactions are normally conducted at temperatures ... | 12/14/2010 |
| 7671158 | End-capped polymer chains and products thereof According to an aspect of the present invention, a method is provided in which a double diphenylethylene compound is reacted with a polymer that contains a carbocationically terminated chain thereby providing a 1,1-diphenylene end-functionalized chain. Subsequently,... | 03/02/2010 |
| 7662900 | Method for producing polyisobutene The present invention relates to a process for preparing polyisobutene by polymerizing isobutene using an inert diluent and a halogen-containing Lewis acid as a catalyst, wherein the isobutene in the form of droplets is contacted with the Lewis acid in a polymerizat... | 02/16/2010 |
| 7645847 | Process for preparing polyolefin products A novel liquid phase polymerization process for preparing a polyolefin product having preselected properties is disclosed. The process includes the steps of providing a liquid feedstock which contains an olefinic component and a catalyst composition consisting of a ... | 01/12/2010 |
| 7498396 | Mid-range vinylidene content polyisobutylene polymer product produced by liquid phase polymerization process A mid-range vinylidene content PIB polymer composition made by a liquid phase polymerization process conducted in a loop reactor at a temperature of at least 60° F. using a BF3/methanol catalyst complex and a contact time of no more than 4 minutes. At le... | 03/03/2009 |
| 7425601 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 09/16/2008 |
| 7411104 | Method for producing polybutene A method for producing high reactive polybutene (HRPB), in which carbon-carbon double bond is positioned at an end of polybutene, is disclosed. The high reactive polybutene having 300˜5000 of number average molecular weight (Mn) can be produced from a raw material ... | 08/12/2008 |
| 7371890 | Method for the continuous production of a compound that carries at least two functional groups A process for continuously preparing a compound which bears at least two functional groups which are each independently selected from the group consisting of nitrile group, carboxylic acid group, carboxylic ester group and carboxamide group. ... | 05/13/2008 |
| 7345128 | Peroxide curable butyl formulations The present invention relates to a peroxide curable rubber compound comprising at least one elastomeric polymer comprising repeating units derived from at least one C4 to C7 isomonoolefin monomer, at least one C4 to C14 mu... | 03/18/2008 |
| 7335705 | Thermosetting coating compositions comprising a copolymer formed from chlorotrifluoroethylene and methods of making copolymers formed from chlorotrifluoroethylene Fluoropolymers are disclosed. The fluoropolymers include (i) units derived from a fluoromonomer composition comprising chlorotrifluoroethylene, and (ii) units derived from at least one donor monomer composition. In the disclosed fluoropolymers, units (i) and (ii) ar... | 02/26/2008 |
| 7332545 | Fluoropolymers, methods for their production, and thermosetting compositions containing them Fluoropolymers are disclosed. The fluoropolymers include (i) units derived from a fluoromonomer having the formula F2C═CXY, where X is CF3 and Y is either F or CF3, and (ii) units derived from at least one donor monomer. In the dis... | 02/19/2008 |
| 7332555 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7332554 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7323529 | Method of making copolymers containing olefinic type monomers Copolymers containing residues of at least one olefinic monomer and a method of making such copolymers including the steps of: (a) providing a pressurized stirred tank; (b) feeding monomer compositions to one or more stirred tank reactors, ... | 01/29/2008 |
| 7288614 | Substituted cycloalkanes, and use thereof as cationic polymerization initiators Substituted 7- to 12-membered cycloalkanes which have leaving groups, in particular chlorine atoms, on tertiary ring carbons, a process for preparing them and their use as initiators for cationic polymerization, in particular the cationic polymerization of isobutene... | 10/30/2007 |
| 7244870 | Method for producing polyisobutenes Polyisobutenes in which at least 60 mol % of the polymer chains have at least one olefinically unsaturated terminal group are prepared by cationic polymerization of isobutene or isobutene-containing monomer mixtures in the condensed phase by a process in which the p... | 07/17/2007 |
| 7238819 | Process for preparing isobutylene-based polymers This invention relates to a metal organic compound, a catalytic composition comprising said metal organic compound, a process for homo- or co-polymerizing isoolefines in the presence of said metal organic compound and a method of stabilizing a compound of the genera... | 07/03/2007 |
| 7232872 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 06/19/2007 |
| 7217773 | Method for producing polyisobutene A process is described for preparing polyisobutene having a content of terminal vinylidene groups of at least 75 mol % by polymerizing isobutene or isobutenic hydrocarbon mixtures in the liquid phase in the presence of a boron trifluoride complex catalyst of the com... | 05/15/2007 |
| 7214750 | Polymerization processes The invention relates to new processes to produce polymers utilizing bayonette cooled slurry reactor systems and diluents including hydrofluorocarbons. ... | 05/08/2007 |
| 7214741 | Peroxide curable butyl formulations The present invention relates to a peroxide curable rubber compound containing at least one elastomeric polymer comprising repeating units derived from at least one C4 to C7 isomonoolefin monomer, at least one C4 to C14 mu... | 05/08/2007 |
| 7202317 | Polymerization of i-butene in hydrocarbon media using bis(borane) co-initiators A method is provided for cationically polymerizing olefin monomer by using a novel coinitiator in the presence of water. More specifically, a method is provided for cationically polymerizing olefin monomer by using a novel coinitiator in an aqueous suspension or aqu... | 04/10/2007 |
| 7196149 | Polymerization of i-butane in hydrocarbon media using bis(borane) co-initiators A method is provided for cationically polymerizing olefin monomer by employing the step of using a novel coinitiator in an organic phase or a neat monomer reaction phase. More specifically, a method is provided for cationically polymerizing olefin monomer by employi... | 03/27/2007 |
| 7196142 | Polyisobutylene-based block anionomers and cationomers and synthesis thereof Various novel block cationomers comprising polyisobutylene (PIB) and poly(2-dimethylamino)ethyl methacrylate) (PDMAEMA) segments have been synthesized and characterized. The specific targets were various molecular weight diblocks (PDMAEMA+) and triblocks ... | 03/27/2007 |
| 7183355 | Waterborne thermosetting compositions containing alternating copolymers of isobutylene type monomers A curable, aqueous film-forming composition is provided, comprising: (a) a copolymer containing reactive functional groups and comprising at least 30 mol % of residues having alternating structural units: -[DM-AM]- | 02/27/2007 |
| 7148303 | Butyl-type rubber with high hardness The present invention relates to an elastomeric polymer having repeating units derived from at least one isomonoolefin monomer, at least one multiolefin monomer, at least one diisoalkenylbenzene monomer, and optionally further copolymerizable monomers, wherein the p... | 12/12/2006 |
| 7144961 | Thermoplastic elastomer composition The present invention provides a thermoplastic elastomer composition which is not only satisfactory in rubber-like characteristics and moldability but also satisfactory in both permanent compression set and vibration damping properties and comprises an unsaturated b... | 12/05/2006 |
| 7132476 | Thermosetting compositions containing alternating copolymers of isobutylene type monomers A thermosetting composition that includes an ungelled copolymer composition and a crosslinking agent. The ungelled copolymer composition includes a functional group-containing copolymer that includes segments of alternating residues derived from a donor monomer comp... | 11/07/2006 |
| 7132477 | Powder coating compositions A thermosetting composition that includes a co-reactable solid, particulate mixture of a film forming material having functional groups, a crosslinking agent having at least two functional groups that are reactive with the functional groups in the film forming mater... | 11/07/2006 |
| 7129306 | Process for the oligomerization of α-olefins having low unsaturation A process is disclosed for the preparation of a poly(α-olefin) polymer wherein the process comprises polymerizing at least one α-olefin in the presence of hydrogen and a catalytically effective amount of catalyst comprising the product obtained by combining a meta... | 10/31/2006 |
| 7125931 | Thermosetting compositions containing alternating copolymers of isobutylene type monomers A thermosetting composition that includes an ungelled copolymer composition and a crosslinking agent. The ungelled copolymer composition includes a functional group-containing copolymer that includes segments of alternating residues derived from a donor monomer comp... | 10/24/2006 |
| 7122600 | Powder coating compositions having improved mar and acid resistance A thermosetting composition that includes a co-reactable solid, particulate mixture of a film forming material having functional groups and a crosslinking agent having at least two functional groups that are reactive with the functional groups in the film forming ma... | 10/17/2006 |
| 7105611 | Thermoplastic elastomer composition An object of the present invention is to provide a thermoplastic elastomer composition which is highly flexible while maintaining vibration damping properties, as a feature of an isobutylene polymer, and is excellent in moldability and rubber-like properties, and al... | 09/12/2006 |
| 7105616 | Separation of isobutene non-reacted during polymerization of isobutene A process for working up a liquid reaction discharge of the cationic polymerization of isobutene, which substantially comprises polyisobutene, unconverted isobutene and, if required, an inert diluent, is described. Problems with foam formation when the unconverted i... | 09/12/2006 |
| 7105615 | Synthesis method for polydimethylketene by friedel-craft cationic polymerization of dimethylketene The invention concerns a cationic catalyst system comprising an initiator (I), a catalyst (K) and a cocatalyst (CoK). The cocatalyst (CoK) is an agent releasing the active polymerizing center of its counter anion generated by the reaction between the catalyst (K) an... | 09/12/2006 |
| 7071275 | Polyisobutene and polyisobutene derivatives for use in lubricant compositions The invention describes polyisobutenyl derivatives of succinic acid obtainable by: i) reacting a polyisobutene which has a reactive end group content of at least 80% and whose molecular weight distribution is characterized by a maximum MP in the distribut... | 07/04/2006 |
| 7067594 | Functionalized isobutylene-polyene copolymers and derivatives thereof A carboxylic derivative composition derived from a carboxylated isobutylene-polyene copolymer having n ranging from about 200 to about 10,000, said copolymer having thereon from about 0.8 to about 7 moles per mole of copolymer of groups derived from at least one α,... | 06/27/2006 |
| 7056990 | Process for producing mid-range vinylidene content polyisobutylene polymer products A process for making a relatively low molecular weight, mid-range vinylidene content PIB polymer product comprising a liquid phase polymerization process conducted in a loop reactor at a temperature of at least 60° F. using a BF3/methanol catalyst comple... | 06/06/2006 |
| 7049383 | Polyisobutene composition A polyisobutene composition having a global maximum of the differential molecular weight distribution curve at a molecular weight Mmax of from 3 500 to 8 000 is described, which comprises at least one local maximum at a molecular weight of from 112 to 560... | 05/23/2006 |
| 7041760 | Process for production of butyl rubber The present invention relates to a process for producing polymers containing repeating units derived from at least one isoolefin monomer, optionally repeating units derived from at least one multiolefin monomer and optionally further copolymerizable monomers in the ... | 05/09/2006 |
