Plasticization, chemical

U.S. Chemical Plastics Scot Laboratories Texo Corp. 

Steps 3 and 4, however, can be described as chemical plasticization since the rate at which these processes occur depends on the chemical properties of molecular polarity, molecular volume, and molecular weight. An overall mechanism of plasticizer action must give adequate explanations for this as weU as the physical plasticization steps. 

Part 414 organic chemicals, plastics, and synthetic fibers (OCPSF)... 

Borden, Inc. (Borden Chemicals Plastics Limited Partnership) Geismar, La. 

The first systematic study of the reaction of chlorine with toluene was carried out in 1866 by Bedstein and Geitner. During the next 40 years, many studies were performed to isolate and identify the various chlorination products (1). During the early 1930s, Hooker Electrochemical Co. (Hooker Chemicals Plastics Corp.) and the Heyden Chemical Corp. (Tenneco) began the manufacture of chlorotoluenes. Hooker Electrochemical Co. was later acquired by Occidental Petroleum Corp. and became the Occidental Chemical Corp. In the mid-1970s, Heyden exited chlorotoluenes production Occidental thus is the sole U.S. producer of chlorotoluenes. 

Ring-Chlorinated Toluenes" under "Chlorocarbons, Chlorohydrocarbons" in ECT3rd ed., Vol. 5, pp. 819—827, by S. Gelfand, Hooker Chemical Plastics Corp. 

Random copolymers of vinyl chloride and other monomers are important commercially. Most of these materials are produced by suspension or emulsion polymerization using free-radical initiators. Important producers for vinyl chloride—vinyUdene chloride copolymers include Borden, Inc. and Dow. These copolymers are used in specialized coatings appHcations because of their enhanced solubiUty and as extender resins in plastisols where rapid fusion is required (72). Another important class of materials are the vinyl chloride—vinyl acetate copolymers. Principal producers include Borden Chemicals Plastics, B. F. Goodrich Chemical, and Union Carbide. The copolymerization of vinyl chloride with vinyl acetate yields a material with improved processabihty compared with vinyl chloride homopolymer. However, the physical and chemical properties of the copolymers are different from those of the homopolymer PVC. Generally, as the vinyl acetate content increases, the resin solubiUty in ketone and ester solvents and its susceptibiUty to chemical attack increase, the resin viscosity and heat distortion temperature decrease, and the tensile strength and flexibiUty increase slightly. 

An explosion and fire (March 13, 1991) occurred at an ethylene oxide unit at Union Carbide Chemicals Plastics Co. s Seadrift plant in Port Lavaca, TX, 125 miles southwest of Houston. The blast killed one, injured 19, and idled the facility, that also produces ethylene, ethylene glycol, glycol ether ethanolamines, and polyethylene. Twenty-five residents were evacuated for several hours as a safety precaution. The plant lost all electrical power, for a few days, because its cogeneration unit was damaged. The Seadrift plant, with 1,600 workers, is capable of making 820 million lb per year of ethylene oxide which is one-third of Carbide s worldwide production of antifreeze, polyester fibers, and surfactants Seadrift produces two thirds of Carbide s worldwide production of polyethylene. 

Dow Chemical Plastics Lyondell Chemical Sigma-Aldrich Fine Chemicals... 

Borden Chemical Borden Chemicals Plastics Celanese (Germany)... 

In 1988 producers of basic industrial chemicals, plastics, and fibers in tlie United States increased tlieir sales at least 10% to about 90 billion (exclusive of foreign subsidiaries) primarily as a result of increased demand at home and abroad. Along witli die increase of chemical production safety and accident prevendon liave become more critical and essential. Such dramadc releases of toxic chemicals as diose tliat occurred in Bhopal and at Three Mile Island have lieightened publie eoneem for die integrity of process facilities dial liandle liazardous materials. 

K. C. H. Yi, and N. J. Maraschin, Bimodal HOPE Via Gas Phase Process, A New Frontier 1990, Union Carbide Chemicals Plastics Technology Corporation./ Mod. Plast. Int. January 1991, p. 12. 

Radiation sterilization Radiochromic chemical Plastic devices impregnated with radiosensitive chemicals which undergo colour changes at relatively low radiation doses Only indicate exposure to radiation... 

Chemical Corporation in the 1960s and now offered for license by Union Carbide Chemicals Plastics Company. Over 50 units were operating in 1996. See also SOLINOX. 

Fiber-bed scrubbers are used to control aerosol emissions from chemical, plastics, asphalt, sulfuric acid, and surface coating industries. They are also used to control lubricant mist emission from rotating machinery and mists from storage tanks. Fiber-bed scrubbers are also applied downstream of other control devices to eliminate a visible plume. Despite their potential for high collection efficiency, fiber-bed scrubbers have had only limited commercial acceptance for dust collection because of their tendency to become plugged. 

Chemicals that cycle in abundance are obvious candidates for consideration as pheromones. Armed with effective analytical techniques we can address the issue of cane toad chemical plasticity with respect to different variables (Table 39.1). We will also investigate the impact of crude and fractionated secretions on the behavior of cane toads, and compare these responses between the same groupings of animals, i.e. sex, life-stage, season etc. We have identified three stages in the cane toad life cycle that are likely controlled by chemical signals, and are an ideal place to start attempting to disrupt their chemical ecology. 

Table 39.1 Variables which may contribute to cane toad (B. marinus) chemical plasticity... 

Lindley, A.A. (1997) An Economic and Environmental Analysis of the Chlor-Alkali Production Process Mercury Cells and Alternative Technologies. Prepared for the European Commission (DG III C-4, Chemicals, Plastics, Rubber). See also OSPAR Document WOCAI 99/5/8 (Madrid, 1999). 

Organic Chemicals, Plastics, and Synthetic Fibers Category... 

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