E. I. du Pont de Nemours and Company, commonly referred to as DuPont, is an American chemical company that was founded in July 1802 as a gunpowder mill by Éleuthère Irénée du Pont. In the 20th century, DuPont developed many polymers such as Vespel, neoprene, nylon, Corian, Teflon, Mylar, Kevlar, Zemdrain, M5 fiber, Nomex, Tyvek, Sorona and Lycra. DuPont developed Freon for the refrigerant industry, and later more environmentally friendly refrigerants. It developed synthetic pigments and paints including ChromaFlair.In 2014, DuPont was the world's fourth largest chemical company based on market capitalization and eighth based on revenue. Its stock price is a component of the Dow Jones Industrial Average. Wikipedia.
DuPont Company | Date: 2017-01-04
In a process for producing a cross-linked asphalt/polymer composition (polymer-modified asphalt or PMA) that comprises or is produced from asphalt and an ethylene copolymer, an anhydride is used as a promoter. The ethylene copolymer comprises copolymerized units derived from ethylene and an epoxy-containing comonomer. An improvement in asphalt properties is demonstrated without the use of an acid catalyst.
DuPont Company | Date: 2017-02-22
This invention relates to polypeptides, more specifically amylase polypeptides and nucleic acids encoding these, and their uses e.g. as non-maltogenic exoamylases In producing food or feed products.
DuPont Company | Date: 2017-04-05
Disclosed are methods for preparing compounds of Formula 1 and 1A. One method utilizes a tert-butyl carbamate amine protecting group and an intermediate of Formula 7. Another method utilizes a benzyl carbamate amine protecting group and an intermediate of Formula 4. Also disclosed is a compound, phenylmethyl N-[2-oxo-2-[(2,2,2-trifluoroethyl)amino]ethyl]carbamate (a compound of Formula 4).
DuPont Company and DuPont Pioneer | Date: 2017-01-11
Transgenic oilseeds having increased total fatty acid content of at least 10% and altered fatty acid profiles when compared to the total fatty acid content of null segregant oilseeds are described. Novel DGAT genes are used to achieve the increase in seed storage lipids.
DuPont Company | Date: 2017-01-25
The present invention relates to the field of shoe stiffener for footwear and in particular to shoe stiffener such as heel counter and toe puff. The shoe stiffener of the present invention comprises a thermoformable polymer composition and a fibrous material.
DuPont Company | Date: 2017-01-10
A continuous mixing reactor has an outer shell having a cylindrical portion with a central section and two opposite conical end sections; a circulation tube within the shell so that an annular passage forms between the shell and the circulation tube; an impeller within and positioned adjacent to one end of the circulation tube; and heat exchange means penetrating the outer shell and extending into the end of the circulation tube opposite the impeller. The outer shell has a hydraulic head forming one end of the shell, a heat exchange medium header at the opposite end of the shell. The circulation tube nearer the heat exchange medium header terminates at or downstream from a tangential plane extending through the shell at the intersection of the central section and the conical end section of the cylindrical portion of shell. The reactor is useful in an alkylation process.
Russian Academy of Sciences, DuPont Company, Ovchinnikov, Bobkova, Medvinskaya, Samokhin and Nekrasov | Date: 2017-04-19
The present invention relates to the field of genetic engineering and medicine. Proposed is a method for treating neurodegenerative diseases and Alzheimers disease that includes the intranasal administration to a subject of a therapeutically effective amount of the YB-1 protein and/or active fragment and/or derivative thereof.
DuPont Company | Date: 2017-09-27
Disclosed are compounds of Formula 1,R^(1) is halogen, C_(1)-C_(2) haloalkyl or C_(1)-C_(2) haloalkoxy;R^(2) is H, halogen or cyano;R^(3) is H, halogen or CF_(3);R^(4) is H, C_(2)-C_(7) alkylcarbonyl or C_(2)-C_(7) alkoxycarbonyl; andR^(5) is C_(1)-C_(6) alkyl or C_(1)-C_(6) haloalkyl, each substituted with one substituent independently selected from hydroxy, C_(1)-C_(6) alkoxy, C_(1)-C_(6) alkylthio, C_(1)-C_(6) alkylsulfinyl, C_(1)-C_(6) alkylsulfonyl, C_(2)-C_(7) alkylaminocarbonyl, C_(3)-C_(9) dialkylaminocarbonyl, C_(2)-C_(7) haloalkylaminocarbonyl and C_(3)-C_(9) halodialkylaminocarbonyl. Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling an invertebrate pest comprising contacting the invertebrate pest or its environment with a biologically effective amount of a compound or a composition of the invention.
DuPont Company | Date: 2017-09-13
This invention is directed to stretchable polymer thick film compositions useful for wearable garments. More specifically, the polymer thick film may be used in applications where significant stretching is required, particularly on substrates that can be highly elongated. A particular type of substrate is a thermoplastic polyurethane substrate.
Grushin V.V.,DuPont Company
Accounts of Chemical Research | Year: 2010
Figure Presented Although springing from two established fields, organometallic chemistry and fluorine chemistry, organometallic fluorine chemistry is still in its early stages. However, developments in this area are expected to provide new tools for the synthesis of selectively fluorinated organic compounds that have been in high demand. Selectively fluorinated organic molecules currently account for up to 40% of all agrochemicals and 20% of all pharmaceuticals on the market. Our research efforts have been focused on the development of new organometallic and catalytic methods for the selective introduction of fluorine and the CF3 group into the aromatic ring. Monofluorinated and trifluoromethylated aromatic compounds are still made by the old technologies that employ stoichiometric quantities of hazardous and costly materials. In this Account, we describe our studies toward the development of safe, catalytic alternatives to these methods. We have synthesized, characterized, and studied the reactivity of the first aryl palladium (II) fluoride complexes. We have demonstrated for the first time that a Pd-F bond can be formed in a soluble and isolable molecular complex: this bond is more stable than previously thought. Toward the goal of fluoroarene formation via Ar-F reductive elimination, we have studied a number of σ-aryl Pd(II) fluorides stabilized by various P, N, and S ligands. It has been established that numerous conventional tertiary phosphine ligands, most popular in Pd catalysis, are unlikely to be useful for the desired C-F bond formation at the metal center because of the competing, kinetically preferred P-F bond-forming reaction. A metallophosphorane mechanism has been demonstrated for the P-F bond-forming processes at Rh(I) and Pd(II), which rules out the possibility of controlling these reactions by varying the amount of phosphine in the system, a most common and often highly efficient technique in homogeneous catalysis. The novel F/Ph rearrangement of the fluoro analogue of Wilkinson's catalyst [(Ph 3P)3RhF] and P-F bond-forming reactions at Pd(II) are insensitive to phosphine concentration and, because of the small size of fluorine, occur even with bulky phosphine ligands. These observations may guide further efforts toward metalcatalyzed nucleophilic fluorination of haloarenes. We have also developed aryne-mediated and CuF2/TMEDA-promoted aromatic fluorination reactions. The formation of fluoroarenes from the corresponding iodo- and bromoarenes in the presence of the CuF2/TMEDA system is the first example of a transition metal-mediated fluorination of nonactivated aryl halides in the liquid phase. Progress has also been made toward the development of aromatic trifluoromethylation. We have found unexpectedly facile and clean benzotrifluoride formation as a result of Ph-CF3 reductive elimination from [(Xantphos)Pd(Ph)CF3]. This observation demonstrates for the first time that the notoriously strong and inert metal-CF3 bond can be easily cleaved (at 50-80°C) as a result of reductive elimination to produce the desired aryl-trifluoromethyl bond, the only previously missing link of the catalytic loop. Our study of the novel complex [(Ph3P)3RhCF3] has led to a rationale for the long-puzzling strong trans influence (electron donation) of the CF3 group which, in complete contrast, is known to be an electron acceptor in organic chemistry. © 2010 American Chemical Society.