Abstract: Aqueous dispersions on non-melt flowable PTFE and melt-fabricable perfluoropolymer are mixed together, followed by recovery of the resultant mixture of the dispersed particles of each of these polymers, and melt mixing of the resultant mixture of particles to obtain a blend in which the PTFE particles form the disperse phase and the perfluoropolymer forms the continuous phase, the melt mixing producing advantageous melt viscosities and the blend exhibiting advantageous physical properties even at high PTFE contents of about 30 wt %.
Type:
Grant
Filed:
September 29, 2009
Date of Patent:
May 24, 2011
Assignee:
E.I. du Pont de Nemours and Company
Inventors:
Sundar Kilnagar Venkataraman, Ralph Munson Aten, Heidi Elizabeth Burch
Abstract: The invention relates to a process for continuously preparing water-absorbing polymer particles by mixing a monomer solution with a redox initiator consisting of at least one oxidizing agent and at least one reducing agent and polymerizing it, wherein the monomer solution is mixed with at least one oxidizing agent upstream of the polymerization reactor and the at least one reducing agent is metered into the polymerization reactor, and also to an apparatus for performing the process.
Type:
Grant
Filed:
August 31, 2006
Date of Patent:
May 24, 2011
Assignee:
BASF SE
Inventors:
Matthias Weismantel, Michael de Marco, Andreas Daiss, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey, Leo Van Miert
Abstract: Disclosed herein are various processes, including but not limited to a continuous process for making an elastomer composition having a Mooney Viscosity (ML (1+4) @125° C.) of from 16 to 180, the composition including a first polymer and a second polymer, the process comprising: polymerizing a first monomer system that includes propylene and one or both of ethylene and propylene in a solvent using a first catalyst system in a first polymerization zone to provide a first polymer, having 60 wt % or more units derived from propylene, including isotactically-arranged propylene-derived sequences and further having a heat of fusion less than 45 J/g or a melting point less than 105° C. or both and a Mooney Viscosity (ML (1+4) @125° C.
Abstract: This invention provides a cationic electrodeposition coating composition which exhibits high paint stability, forms coating film excelling in conductivity, intimate adhesion, corrosion resistance, finished appearance and acid resistance, and is capable of forming uniform electrocoated film also on substrates having uneven surfaces, characterized by comprising a conductive filler dispersion paste, base resin and a curing agent, said paste being formed by dispersing a conductive filler (A) composed of high conductive carbon black (a1) and at least one conductive powder (a2) selected from furnace black, graphite and conductive whisker, using a pigment-dispersing resin (B), the composition (i) containing 30-100 wt parts of a conductive filler (A) which contains at least 2 wt parts of high conductive carbon black (a1), per 100 wt parts of combined solid content of the base resin and the curing agent, (ii) the weight ratio of the conductive powder (a2)/high conductive carbon black (a1) being within a range of 0.
Abstract: This invention provides methods to form modified hydrogel materials using reactive compounding. The method includes mixing a hydrogel material with a plasticizer in a compounding apparatus. During mixing, a reactive chemical compound is added to the mixture that reacts with the hydrogel material to form a modified hydrogel material.
Type:
Grant
Filed:
November 16, 2007
Date of Patent:
May 24, 2011
Assignee:
Zimmer, Inc.
Inventors:
Brian H. Thomas, Donald L. Yakimicki, Steven Charlebois
Abstract: The invention concerns water-absorbing polymeric particles possessing high saline flow conductivity in the swollen state which comprise insoluble metal sulfates as synergistic fillers, and also a process for their production and their use.
Type:
Grant
Filed:
November 28, 2005
Date of Patent:
May 24, 2011
Assignee:
BASF Aktiengesellschaft
Inventors:
Ulrich Riegel, Thomas Daniel, Dieter Hermeling, Mark Elliott
Abstract: The present invention relates to butene-1 copolymers containing up to 40% by mol of ethylene and/or propylene derived characterized by the following properties: d) Product of the reactivity ratios r1·r2?2; e) Content of butene-1 units in form of isotactic pentads (mmmm)>98%; and f) absence of 4,1 insertions of butene units.
Type:
Grant
Filed:
November 3, 2003
Date of Patent:
May 17, 2011
Assignee:
Basell Poliolefine Italia, S.p.A.
Inventors:
Giampiero Morini, Fabrizio Piemontesi, Gianni Vitale, Daniele Bigiavi, Anteo Pelliconi, Enea Garagnani, Pietro Baita
Abstract: Disclosed are polyethylene (“PE”) compositions, articles comprising PE compositions, and methods of making blended PE compositions, wherein the blended composition comprises from about 80 to about 95 weight % of a first PE and from about 5 to about 20 weight % of a second PE. The first PE has a density greater than or equal to about 0.945 g/cc and a MWD greater than about 5. The second PE has a density less than about 0.945 g/cc, a melt index less than about 0.70 g/10 minutes and less than or equal to the melt index of the first PE, a MWD ranging from about 1 to about 5, a weight average molecular weight less than about 400,000, and a CDBI greater than about 50%. The PE composition has an ESCR greater than the ESCR of the first PE.
Type:
Grant
Filed:
June 1, 2006
Date of Patent:
May 17, 2011
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Donna Jean Crowther, Stanley J. Katzen, Zerong Lin, Arnold Lustiger, Jeanne Marie MacDonald, Thomas T. Sun
Abstract: The present invention provides a process for preparing emulsion polymer particles of a hollow core/shell structure in the presence of a monomer plasticizer having a ceiling temperature less than 181° C. wherein a polymerization inhibitor or reducing agent is not added to the aqueous emulsion of the core shell particles during the neutralization and swelling stage. The obtained core shell particles are useful in paints, paper coatings, foams, and cosmetics.
Type:
Grant
Filed:
July 10, 2006
Date of Patent:
May 17, 2011
Assignee:
BASF Aktiengesellschaft
Inventors:
Konrad Roschmann, Arno Tuchbreiter, Ekkehard Jahns, Joerg Leuninger, Bernhard Schuler, Oliver Wagner, Michaela Reinsch, Robert Wrazidlo
Abstract: Drag reduction of hydrocarbon fluids flowing through pipelines of various lengths is improved by polyolefin drag reducer dispersions or dispersions using bi- or multi-modal particle size distributions. Drag reducers having larger particle sizes dissolve more slowly than drag reducers having smaller particle sizes. By using at least bi-modal particle size distributions drag reduction can be distributed more uniformly over the length of the pipeline where smaller sized particles dissolve sooner or earlier in the pipeline and larger sized particles dissolve later or further along the pipeline.
Type:
Grant
Filed:
June 13, 2006
Date of Patent:
May 10, 2011
Assignee:
Baker Hughes Incorporated
Inventors:
Jeffery R. Harris, Lu Chien Chou, George G. Ramsay, John F. Motier, Nagesh S. Kommareddi, Thomas Mathew
Abstract: A method of preparing a steep particle size inorganic particulate material includes grinding an aqueous suspension of an inorganic particulate material having a solids content of less than 35% and including a sub-effective amount of a dispersant for the inorganic particulate material. The method may further include dewatering the aqueous suspension to a solids content of at least 50% and dispersing the dewatered aqueous suspension by adding an additional amount of dispersant, and wherein, after grinding, the inorganic particulate material has a steepness factor above 35.
Type:
Grant
Filed:
March 22, 2010
Date of Patent:
May 10, 2011
Assignee:
Imerys Minerals Limited
Inventors:
John Claude Husband, Nigel V. Jarvis, Charles Desmond Payton, David Robert Skuse
Abstract: A composition includes a salt of a carboxyethyl phosphinate ester compound. Additionally, the composition may also include a polymeric resin, such as a thermoplastic resin. The composition may have improved physical and chemical properties including flame retardancy, thermal stability, and hygroscopicity.
Type:
Grant
Filed:
November 27, 2006
Date of Patent:
May 10, 2011
Assignee:
Cheil Industries Inc
Inventors:
Sang Hyun Hong, Jeong Hwan Ku, Su Hak Bae, Jin Hwan Choi, Jin Hwan Kim, Min Soo Lee
Abstract: In one embodiment is a thermoplastic vulcanizates having improved extrusion properties formed from a composition that includes from 20% to about 80% by weight of an elastomer, from about 80% to about 20% by weight of a thermoplastic, from about 0.05 to about 12 phr of a multifunctional methacrylate monomer peroxide curing coagent; and from about 0.02 to about 6 phr of a phosphorous containing stabilizer. The resultant thermoplastic vulcanizate may be cured with a peroxide curing agent and shows improved die lip build up compared to conventionally prepared thermoplastic vulcanizates. Methods of forming thermoplastic vulcanizates having improved die lip build up are also taught.
Type:
Grant
Filed:
October 11, 2006
Date of Patent:
May 3, 2011
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Oansuk Chung, Trazollah Ouhadi, Eugene R. Uhl
Abstract: Blends of polysulfones, polyethersulfones and polyphenylene ether sulfones with resorcinol based polyesters, or resorcinol based polyester carbonate polymers, and silicone copolymers have improved flame resistance. Peak heat release energy is reduced and the time to reach peak heat release is increased.
Type:
Grant
Filed:
September 16, 2005
Date of Patent:
April 26, 2011
Assignee:
SABIC Innovative Plastics IP B.V.
Inventors:
Robert Russell Gallucci, Ganesh Kailasam, William A. Kernick, III, Mark Alan Sanner, Rajendra Kashinath Singh
Abstract: This invention relates to a thermoplastic polymer composition that exhibits an excellent combination of properties for use in manufacturing shipping combs for use in conjunction with moving actuators for hard disk drives. The thermoplastic polymer composition of this invention is comprised of (1) from 10 weight percent to 90 weight percent polycarbonate, (2) from 1 weight percent to 6 weight percent carbon nanotubes, (3) from 5 weight percent to 85 weight percent of a sulfone polymer, (4) from 0.5 weight percent to 10 weight percent of a functionalized rubbery polymer, and (5) from 0.5 weight percent to 5 weight percent of a lubricant selected from the group consisting of high density polyethylene and polyester wax, wherein all weight percentages are based upon the total weight of the thermoplastic polymer composition.
Type:
Grant
Filed:
July 28, 2008
Date of Patent:
April 26, 2011
Assignee:
Ovation Polymer Technology and Engineered Materials, Inc.
Abstract: A composition that includes functionalized polymers and one or more types of particulate filler exhibits both an increased gum Mooney viscosity and a decreased compound Mooney viscosity relative to a comparable composition that includes only one such functionalized polymer. The functionalized polymers include first and second types of functionalities which exhibit a non-covalent interaction that has a bond energy of from about 0.1 to about 20 kJ/mol.
Abstract: There is disclosed a polyvinyl alcohol having a 1,2-glycol bond in a side chain, and a process for preparing the polyvinyl alcolnol wherein there is no generation of dimethyl carbonate hence no need of a process of eliminating dimethyl carbonate in the recovering process of waste liquid after hydrolysis. Also, even when an introduction amount of 1,2-glycol bonds is increased, there is no deterioration of solubility in a hydrolyzing solution (methanol) of a copolymer (paste) before hydrolysis. Further, water-insolubility is not lowered even in experiencing thermal history. Specifically, there is provided a polyvinyl alcohol having a 1,2-glycol bond in a side chain obtained by hydrolyzing a copolymer of a vinyl ester monomer and a compound shown in the formula (1) wherein the hydrolysis degree of the polyvinyl alcohol is at least 60% by mol.
Type:
Grant
Filed:
August 18, 2004
Date of Patent:
April 19, 2011
Assignee:
The Nippon Synthetic Chemical Industry Co., Ltd.
Abstract: The present application provides novel nitrile rubbers comprising repeating units of at least one ?,?-unsaturated nitrile, at least one conjugated diene and optionally one or more further copolymerizable monomers which nitrile rubbers are distinguished by a specific calcium content as well as a specific chlorine content and dispose of specific thio end groups. Additionally, an improved polymerization and work-up process is provided to produce the aforementioned nitrile rubbers.
Abstract: The present invention concerns a method of manufacturing flame-retardant polyethylene or polypropylene foam using a derivative of carboxylic acid of phenylphosphinic acid and the flame-retardant polymer foam made thereby. More specifically, this invention concerns a method of manufacturing highly expanded flame-retardant polymer foam prepared by mixing the above mentioned phosphorous flame retardant in a polymer resin and expanding the mixture with a volatile blowing agent or by applying a solution of an organic phosphorous compound to an already-made highly expanded foam and then drying the highly-expanded polymer foam, and the flame-retardant foam prepared thereby.
Abstract: A process is described for producing a polymer blend comprising (a) a first polymer component comprising a crystalline propylene polymer and (b) a second polymer component comprising a copolymer of propylene with at least one comonomer, wherein the copolymer comprises between about 7 wt % and about 28 wt % of comonomer and the copolymer has a heat of fusion of 0.5 to 70 J/g and an mm triad tacticity of 75% or greater. The process comprises polymerizing propylene under first polymerization conditions in a polymerization reaction zone to produce a first effluent comprising a crystalline propylene polymer containing no more than 10% by weight of other monomers, the first polymerization conditions comprising a first reaction temperature between about 50° C. and about 100° C.