Shell Chemical Company

Products from the Chemicals Division, Procter Gamble Company, Cincinnati, Ohio, 1987 Mdol Tatty Mlcohols, Sherex Chemical Company, Dublin, Ohio, 1986 Vista Sufactants, Industrial Chemicals, andPlastics, Vista Chemical Company, Houston, Texas, 1987 TpalTinear Primary Mlcohols, Ethyl Corporation, Baton Rouge, Louisiana, 1985 Neodol, Shell Chemical Company, Houston, Texas, 1987 HenkelTat Paw Materials, Henkel K.-G.a.A., Dbsseldorf, Eed. Rep. Germany. 

ETON Resin Structural Reference Manual, Shell Chemical Company. 

CardurcF Technical Manual CA 1.1, 3rd ed.. Data Sheet, Shell Chemical Company, Reprinted June, 1989. 

XeoXcT Technical Manual, W 1.1, 5th ed.. Technical Bulletin, Shell Chemical Company. 

Shell Chemical Company has iatroduced a new tetraglycidyl amine and a new stiff backbone diglycidyl ether under the respective trade names EPON HPT Resia 1071 [103490-06-8] and EPON HPT Resia 1079 [47758-37-2] (8,9), which have superior hot—wet performance compared with TGMDA. These two materials are chemically Ai,Ai,A7,A7-tetraglycidyl-a,aTis(4-aminophenyl)-/)-diisopropylben2ene and... 

Two resin systems based on this chemical concept are commercially available from Shell Chemical Company/Technochemie under the COMPIMIDE trademark COMPIMIDE 183 (34) [98723-11-2], for use in printed circuit boards, and COMPIMIDE 796 [106856-59-1], as a resin for low pressure autoclave mol ding (35). Typical properties of COMPIMIDE 183 glass fabric—PCB laminates are provided in Table 8. COMPIMIDE 183 offers a combination of advantageous properties, such as a high glass transition temperature, low expansion coefficient, and flame resistance without bromine compound additives. 

Commercial BMI Resins. Since the late 1960s, bismaleimide resins have been commercially available. The first company in the marketplace was Rhc ne Poulenc Chimie, Erance. Several others, Technochemie, Germany CIBA GEIGY, Switzerland DSM, The Netherlands, BASE, West Germany Mitsubishi Gas Chemicals and MitsuiToatsu, both of Japan Reichhold and Polyorganics from the United States and Shell Chemical Company, United States (through the acquisition of Technochemie by Deutsche Shell AG), followed. Some of them lost interest in this speciaUty market sector. Table 13 indicates the BMI resins available at the end of 1992. No reference is made to prepreg systems available from various sources. A complete Hst of available products and information on any particular material should be obtained from the suppHers. 

Tetramethylene sulfone is commercially available from the Shell Chemical Company and the Phillips Petroleum Company. 

Cycloheptatriene containing 9% toluene is available from the Shell Chemical Company, New York. Less pure cycloheptatriene, obtained by pyrolysis of bicycloheptadiene followed by a crude distillation, has been used successfully in this preparation. The quantity of the tropilidene/toluene mixture is adjusted in accord with its purity as estimated by vapor-phase chromatography on didecyl phthalate. 

The next major discovery in this field, which was the result of a joint research effort in 1968 between M and T Chemicals, Inc., and the Dow Chemical Company in the United States (475, 524), was that tricyclo-hexyltin hydroxide ("Plictran ) possesses a very high activity against certain types of mites, and this compound was subsequently introduced by Dow as an acaricide for use on apple, pear, and citrus-fruit trees. A second triorganotin acaricide, bis(trineophyltin) oxide ("Vendex or "Torque ), has recently been introduced by Shell Chemical Company (476). Two other tricyclohexyltin compounds are currently under de-... 

Shell Chemical Company, Houston, TX 77251 iohn. kn i lion (alshell. com... 

Shell Chemical Company), exhibits a maximum at 300 nm, corresponding to that of the model chromophore anisole. The fluorescence intensity decreases monotonically with increasing concentration of 2,4-dihydroxybenzophenone (DHB) and, furthermore, decreases with time on continued excitation (274 nm) in the spectrophotometer. The fluorescence loss with time may be resolved into two exponential decays. Initially, a relatively rapid fluorescence loss is observed within 20 sec, followed by a slower loss. Loss constants for the initial (k ) and secondary (kj) exponential decays for 1.5 ym films (on glass slides) containing varying concentrations of DHB are provided in Table I (entries 1-3). The initial loss constants are seen to decrease more markedly with increasing DHB concentration than the secondary constants. 

Inc. for financial assistance, and Shell Chemical Company for generously supplying resins. 

The pathway and kinetics of the C to S transition have been studied on shear-aligned cylinders of the commercial diblock copolymer of PS and poly(ethylene-co-butylene) (KRATON G 1657 Shell Chemical Company) [143, 144], A complete dissolution of the cylindrical structure before the epitaxial... 

Lidov A process for chlorinating cyclopentadiene to octachloropentadiene, which is then thermally dechlorinated to hexachlorocyclopentadiene (HCCP), used as an intermediate in the manufacture of insecticides and flame retardants. The initial chlorination is catalyzed by phosphoms pentachloride or arsenious oxide. Invented by R. E. Lidov in The Netherlands and commercialized by the Shell Chemical Company. 

LIPP-SHAC [Liquid polymerization of propylene with super high activity catalyst] A process for making polypropylene. Developed by the Shell Chemical Company and used at Pemis, The Netherlands Carrington, England and Geelong, Australia. 

UNIPOL [Union Carbide Polymerization] A process for polymerizing ethylene to polyethylene, and propylene to polypropylene. It is a low-pressure, gas-phase, fluidized-bed process, in contrast to the Ziegler-Natta process, which is conducted in the liquid phase. The catalyst powder is continuously added to the bed and the granular product is continuously withdrawn. A co-monomer such as 1-butene is normally used. The polyethylene process was developed by F. J. Karol and his colleagues at Union Carbide Corporation the polypropylene process was developed jointly with the Shell Chemical Company. The development of the ethylene process started in the mid 1960s, the propylene process was first commercialized in 1983. It is currently used under license by 75 producers in 26 countries, in a total of 96 reactors with a combined capacity of over 12 million tonnes/y. It is now available through Univation, the joint licensing subsidiary of Union Carbide and Exxon Chemical. A supported metallocene catalyst is used today. 

Materials. Reagent grade solvents, dimethyl formamide (DMF), dimethyl acetamide (DMAC), dimethyl sulfoxide (DMSO) and methanol were purchased from Baker, stored over molecular sieves once opened, and used without further purification. Aminoethane thiosulfuric acid (AETSA) purchased from Kodak, and Taurine, purchased from Alfa were purified by recrystallization. Each was thrice recrystallized from hot, deionized water. The crystalline precipitate was dried (48 hours at 40 °C) in-vacuo and subsequently stored in a desiccator. Benzophenone (BP) was purchased from Aldrich Chemical Company. QUANTACURE BTC (BTC), (4-benzolybenzyl) trimethylammonium chloride, was used as supplied by Aceto, Inc., Flushing, New York. Phenyl glycidyl ether (PGE) was purchased from MCB, distilled in-vacuo. and stored at -15 °C. Epon 828 was used as supplied bv Shell Chemical Company. The epoxy equivalent weight (EEW) for Epon 828 determined by an appropriate titration, was found to be 187.7. 

RRS Engineering SAFER Systems, LLC Shell Chemical Companies Solutia, Inc. 

Alternative monomers for elimination of crystallinity in PET have been recently proposed. In each of these cases, cyclic monomers were employed, and in most cases, these monomers were alicyclic, and potentially possess sub-7 g molecular motions that could also be of help in dissipating impact energy through molecular motions. The four-membered ring monomer, 2,2,4,4-tetramethyl-l,3-cyclobutanediol (CBDO), first developed by the Shell Chemical Company, has... 

Since PTT is a new commercial product, the Shell Chemical Company, as the company which first introduced it to the market, took the responsibility of product stewardship [112], and registered the polymer on the chemical inventory lists in several countries. As a high-molecular-weight polymer, PTT is biologically inactive and requires safe handling like many other commercial polymers. 

Chuah, H. H., Vinson, R. W. and Ulzelmeier, C. W., The Kinetics of Poly(Propylene Terephthalate) Solid-state Polymerization in Research Awareness Bulletin, Shell Chemical Company, July 1993, Houston, TX, pp. 101-103. 

Jo, W. H., Polymorphism and Surface Properties of Poly(trimeth-ylene terephthalate) (PTT), Final Report, Shell Chemical Company, Houston, Tx, 1999. 

Hwo, C., Forschner, T., Lowtan, R., Gwyn, D. and Cristea, B Poly(Tri-methylene Phthalates or Naphthalate) and Copolymers New Opportunities in Film, Engineering Thermoplastic and Other Applications, Technical Bulletin SC 2731-98, Shell Chemical Company, Houston, Tx, 1998. 

Kiibler, K. S., C. A. Caico, Lin-Vien, D. and French, R. N Byproduct Emissions from Poly(trimethylene terephthalate) Studies on the Release of Acrolein and Allyl Alcohol During Processing, Storage, and Shipping of PTT, Technical Information Report, WTC-3659, Shell Chemical Company, Houston, TX, 2000. 

Materials. The adhesives and primers used in this study were model and commercial materials that were cured according to conditions appropriate for the specific adhesive chemistry. Adhesives A and B were conventional epoxy/Versamid and epoxy/dlcyandiamlde adhesives, respectively. Adhesives C and D were commercial urethane and epoxy/polyamlde adhesives, respectively. Adhesive E was a conventional two-part epoxy/amldoamlne adhesive. Adhesive F was a vinyl plastlsol adhesive. The adhesive primers used in this study were a urethane crosslinked epoxy electrocoat primer and spray primers based on tall oil modified epoxy ester, and polyesterpolyol/isocyan-ate chemistry. Dicyandlamlde was obtained from Aldrich Chemical Company. Epon 828 was obtained from Shell Chemical Company. 

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