DuPont Chemical Corp

The cellulose fibers in paper are the starting material for regenerated fibers such as rayon and cellulose acetate, which, together, form the historical bridge from biopolymers to completely synthetic fibers. Synthetic rubber was created in Germany in 1917, but from the forensic perspective, a much more important advance was the S5mthesis of nylon (specifically, nylon 6,6) in 1935. The discovery of nylon is credited to Dr. Wallace Carothers, who worked at DuPont Chemical Corp. Initially, his work had been with esters and phenols, but he became interest in amides for possible use in the then-infant world of polymer science. What would become known as nylon was developed in 1935 and commercialized in 1939, initially for women s hosiery. World War n jump-started the polymer indu.stry, and many advances quickly followed. The emphasis here will be on fibers, with later sections in the chapter examining other applications of synthetic polymers. 

The major producers of VAM and VAM-based polymers include, but are not limited to, BP of the UK and Wacker Chemie of Germany. Celanese Chemicals, Dow Chemical Corp., DuPont and Millenium are important USA-based producers. In Asia, Kuraray, Nippon Gohsei and Showa Denko of Japan Dairen Chemical and Asian Acetyls of Taiwan and Shanghai Petrochemical and Sichuan Vinylon Works of China produce VAM and their polymers. These regions are also the major markets for the different products obtained from PVAc and its derivatives. 

Producers of carbon tetrachloride in the United States include Allied Chemical Corp, Dow Chemical Company, DuPont, FCM Corp, Stauffer Chemical Co., and Vulcan Material Corp [153], As of 1995, Dow and Vulcan are the only U.S. producers, whose combined capacity was 295 million pounds per year. The future outlook of carbon tetrachloride is literally nonexistant,... 

The membrane material most often used in fuel cells today is Nation , made by DuPont. Nation is the product name of a perfluorosulfraiic acid/polyethylene copolymer (PFSA/PTFF) that clearly meets the specifications for thermal and chemical stability and high levels of protmi conductivity and electrical resistance. Other perfluorinated membranes are now commercially available in addition to Nation DOW Membrane from Dow Chemical Corp. and a membrane made by... 

Struktol TR-016 is produced by Struktol Co. of America Unite MP-1000 and MP-880 are produced by Aristech Chemical Corp Fusabond P, Grade MZ-109D is produced by DuPont Canada, Inc. 

Typical suppliers of fatty acid amide lubricants include Ashland Chemical Inc., C. P. Hall Co., and Witco Corp. Typical suppliers of fatty acid esters include Akzo Chemical Inc., Eastman Chemical Products, and ICI Americas Inc. Typical suppliers of metallic stearates include Hammond Lead Products, Inc., Harwich Chemical Corp., and Witco Corp. Typical suppliers of molybdenum disulfide include Acheson Colloids Co., CSA Chemicals, and Specialty Products Co. Typical suppliers of paraffin waxes include Astor Wax Corp. C. P. Hall Co., and Hoechst Celanese Corp. Typical suppliers of polyethylene waxes inclnde Astor Wax Co., Eastman Chemical Products and Exxon Chemical Co. Typical suppliers of silicone lubricants include Ashland Chemical Inc., Dow Coming Corp. and Wacker Silicones Corp. Typical suppliers of fluorocarbon lubricants include Acheson Colloids Co., DuPont, and Harwich Chemical Corp. 

Cimnnphtal, High-grade organic pigments, Ciba Specialty Chemicals Corp., Pigments Div. Cronar, PET j otographic film base, DuPont Polyesta- Eilms... 

Dow Chemical DuPont Chemicals Elf Atochem NA Formosa Plastics Fort Howard General Electric Georgia Gulf Georgia Pacific Holtra Chem La Roche Chemicals Magnesium Corp. Qccidental Chemical Qlin... 

Also in existence is the joint-venture web site for leading elastomers suppliers that include Bayer, CK Witco Corp., DSM Elastomers, DuPont-Dow Elastomers L.L.C., Flexsys, M.A. Hanna Rubber Compounding, and Zeon Chemicals L.P. They targeted to create www.ElastomerSolutions.com, a global marketplace and customer-focused, web-based community devoted solely to the sale of elastomers and associated products. 

Glove material of constmction and size should also be considered when designing an isolator. There is a variety of gloves available for isolator use. Be sure to install gloves that are compatible with the materials handled in the isolator. Glove manufacturers (e.g., North Safety Products, Cranston, RI Renco Corp., Manchester, MA) can provide chemical compatibility charts to help in glove selection. A popular glove on the market for analytical use is the 15 mil Hypalon (DuPont Performance... 

Vinyl Acetate, A. Guide to Safety and Handling, compiled by E. I. duPont de Nemours and Co., Inc., Hoechst Celanese Chemical Group, Inc., Quantum Chemical Co., and Union Carbide Corp., 1995. 

DU PONT AGRICULTURE NUTRITION EI DU PONT DE NEMOURS CO (DUPONT) EAGLEPICHER CORPORATION EASTMAN CHEMICAL COMPANY ENGLOBAL CORP ENI SPA... 

The following commercial polymeric substrates have been investigated low density polyethylene (PE, Dow Chemical Canada Inc.) polyimide (PI, DuPont Kapton H), polytetrafluoroethylene (PTFE, DuPont Teflon), polycarbonate (PC, Mobay Corp.) and surface-lubricated (with glycerol ester) polyvinylchloride (FVC, Canadian Occidental Petroleum Ltd). After plasma treatment, the samples were exposed to ambient atmosphere for 10 - 30 minutes while being transferred to the following... 

Starting materials and solvents were purchased from Aldrich Chemical Co. acetonitrile (ACN), N,N-dimethylformamide (DMF), and N-methyl-2-pyrrolidone (NMP) were obtained anhydrous in Sure/Seal bottles and used as received. The polyamic acid of PMDA-ODA (2545 Pyralin) was supplied by DuPont. The soluble polyimide XU-218, derived from 3,3, 4,4 -benzophenone tetracarboxylic dianhydride (BTDA) and diamino-1,1,3-trimethyl-3-phenylindan isomers (DAPI) was purchased from Ciba-Geigy Corp. The acetylene terminated imide oligomer powder (Thermid MC-600) derived from BTDA, aminophenylacetylene, and 1,3-bis (2-aminophenoxy) benzene (APB) was obtained from National Starch and Chemical Company. Kapton Type II (PMDA-ODA) films were obtained from DuPont Co., Apical polyimide films were obtained from Allied Corp., and Upilex Type-S and Type-R polyimide films derived from 3,3, 4,4 -biphenyl tetracarboxylic dianhydride (BPDA) plus p-phenylenediamine (PDA) and ODA, respectively were obtained from ICI Americas Inc. 

The chemical engineer may work in three types of organizations. One is the operating company, such as DuPont and Dow Chemical, whose main concern is to produce products. These companies are also engaged in developing new processes. If a new plant for an old improved process, or a plant for a recently developed process is being considered, a plant constmction organization, the second company type, such as the C.E. Lummus Corp. or the Forster Wheeler Corp., will... 

Title of brief paper in C EN 42, Aug 31, 1964, p 46. It describes achievements of DuPont in cladrplate market and the fabrication by Nooter Corp of St Louis, Mo of four chemical process vessels for Amoco, using DuPont s titanium-clad plates... 

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