N E W PRODUCTS Chemicals and Materials
ACRYLIC SEALANT
A durable, flexible one-part seal-
POURABLE SILICONE R U B B E R
ant, Sonac, that assures a weathertight seal between dissimilar building materials a n d provides maxim u m performance in areas subject to extensive joint movement. I t can be applied easily, without priming, to glass, metal, wood, porcelain, a n d masonry. Sonac rapidly attains firmness, remains elastic, and is virtually unaffected by ultraviolet rays, ozone, moisture, or temperatures ranging from -30" F. u p to 200" F. I t is available in 5gallon pails or in cartridges of 11 fluid ounces each. Sonneborn Building Products, Inc. 30 1 FLUOROCARBON DISPERSION AGENT
CRYSTALBOND
KantStik 118, a specially modified fluorocarbon carried in a volatile medium, provides excellent mold separation for any plastic or foam. I t may be applied by brushing, wiping, or spraying. I t has been successfully tested i n fabrication processes such as compression, injection and transfer molding, filament winding, casting, encapsulating, and h a n d lay up. I n addition, i t can be applied to roller guides, conveyors, a n d other handling equipment to prevent parts or materials from sticking and to simplify cleaning. Specialty Products
POURABLE SILICONE RUBBER
BIOCIDE AND POLYELECTROLYTE
76
INDUSTRIAL A N D E N G I N E E R I N G
A translucent, precatalyLed, room-temperature curing liquid silicone rubber packaged i n applicator-type tubes a n d cartridges as well as bulk containers is available. Following application by brushing, spraying, or pouring, RTV-118 cures a t room temperature to a firm, flexible, resilient rubber on exposure to moisture from the air. It has a low viscosity (approximately 350 poises a t 25" C . ) i n the uncured state, making i t easily pourable. General Electric Co. 303 c H E M I S T R-Y
CRYSTA LBOND
An acetone soluble adhesive suitable as a temporary bond for holding delicate crystals, metallurgical specimens, glass components, a n d ceramic substrates for machining, slicing, grinding, and polishing is available. T h e thermoplastic polymer will bond readily to metals, glass, or ceramic surfaces a n d will not clog the cutting blades or grinding media. T h e adhesive can be removed easily using a simple acetone rinse procedure. Aremco Products, Inc. 304 BIOCIDE AND POLYELECTROLYTE
A liquid concentrate that destroys algae and other biological growth and removes mud, silt, and solids from recirculating and oncethrough water cooling systems is available. T h e water treatment compound Biolyte, which contains a highly effective biocide, an organometallic salt, and polyelectrolyte, a high molecular weight, organic polymer, is compatible with all types of cooling water treatment systems. Supplied i n liquid form, this material does not cause foaming of treated water. Vulcan Laboratories, Inc. 305 TRIBUTYLPHOSPHINE AND TRIOCTYLPHOSPHINE OXIDES
T B P O and T O P 0 are offered i n semicommercial quantities and in a reagent grade for analytical extractions. T h e alkylphosphine oxides are cornplexing agents in the solvent-solvent extraction of metals. In a typical system, a nonpolar solvent, such as kerosine, cyclohexane, or benzene, is used to quantitatively extract uranium, vanadium, platinum, gold, thorium, or other metal salts from a variety of strong acids. T h e y also may be used as homogeneous catalysts either by themselves or as complexes with metal salts. Carlisle Chemical TVorks, Inc. 306
AMINO ACID DERIVATIVES
LITERATURE
The American Chemical Society
Trimethylsilylated a m i n o acids known as T M S a m i n o acids are available. The trimethylsilyl groups are bonded to t h e parent compounds through both Si-N a n d Si-0 linkages. T h e outstanding features of the T M S derivatives are low volatility, thermal stability, and sharp resolution on the gas chromatograph. T M S derivatives are available b o t h i n p u r e form a n d i n 10% solution in high purity hexane for use as chromatographic standards. Pierce Chemical Co. 307
Glass Fiber-Reinforced Thermoplastics. A 32-page engineering manual of properties and performance data, applications, and materials comparisons provides the design engineer or plastics processor detailed information about the unique features of glass fiber-reinforced thermoplastics and the ways in which these materials can be used to the best advantage. Fiberfil, Inc. 311
announces a INEGljournaI
LASER COOLANT
A fluorinated liquid designed to withstand energy pulses from xenon flash tubes and capable of being used as a laser a n d flash tube coola n t is available. T h e fluorocarbon FC-104 provides the following features: optical transparency, liquid range of -80" F. t o +215" F., good heat transfer capabilities, high electrical insulation, nonflammability, high temperature stability, and compatibility with construction materials. 3M Co. 308 COPPER CONDUCTIVE INK
A self-priming, epoxy-based conductive copper i n k is provided in two parts which are blended together to form an electrically conductive composite. Tensile strength exceeds 5000 p i . a n d volu m e resistivity is 0.025 ohm-cm. Applications include direct painted copper circuits, conductive solder, electroplating base, component lead terminations, and printed circuit repair. Fritz Chemical Co. 309 ANTIFOAM i
a
A n additive t o prevent foaming in t h e mixing and application of agricultural sprays, MG-89 is particularly effective in t h e application of sprays by aircraft. It is a white, creamy emulsion with a specific gravity of 0.97 to 1.0 and it is dispersible in water with mild agitation. The material is designed to b e added to t h e concentrate in t h e use-dilution t a n k to prevent foaming as mixing and dilution take place. T h e chemical is available in 5-gallon pails a n d i n 55-gallon nonreturnable drums. H o d a g Chemical Corp. 310
Fluorine Compounds. Catalog 15 lists the inorganic compounds available with price and ordering information. Wl;ere applicable, boiling point, specific gravity, and/or purity are listed. 312 Ozark-Mahoning Co.
ENVIRONMENTAL SCIENCE AND TECHNOLOGY emphasizing water, air, and waste chemistry to be published monthly by the ACS starting in January 1967.
Phosphonitrilic Chloride Trimer. A 6page bulletin describes the properties, applications, and reactions of this compmnd. Major uses include inorganic polymers and modifying organic polymers when heat-and flame-resistance are required. Millmaster Onyx Corp. 313 Dicyclohexylamine. Bulletin No. 66-51 describes the application of the amine in corrosion-preventive compounds and in the manufacture of paints, varnishes, inks, linseed oil, colored plastics, shellacs, rubber, and petroleum products. Included are the structural and physical properties. Ab314 bott Laboratories. Sulfolanes. A revised, enlarged, and updated bulletin is available for these compounds. Included is a complete bibliography covering the applications of these compounds, together with reaction charts on uses in pharmaceuticals, rubber, agriculture, plastics, and other chemical process industries. GallardSchlesinger Chemical Mfg. Corp. 315 Ethylcellulose Resin. Bulletin No. 170-194 describes the composition, characteristics, and end-uses of Ethocel resin in coatings applications. T h e resin is tough, stable to heat, and compatible with most alkalies, low cost plasticizers, waxes, and other resins. 316 Dow Chemical Co. Tantalum. A 16-page illustrated brochure describes tantalum manufacture, physical and mechanical properties, availability, tolerances, and fabricating characteristics. Tantalum provides corrosion resistance, ultrahigh temperature properties, and desirable electrical characteristics. National Research Corp. 317 Radioisotopes and Stable Isotope Compounds. A 26-page catalog offers more than 1500 different (2-13, C-14, H-2, H3, C1-36 and other labeled compounds of guaranteed purity at competitive prices. Nuclear Research Chemicals, 318 Inc.
EDITOR: Or. James J. Morgan Associate Professor o f Environmental Health Engineering Division of Engineering and Applied.Science California Institute of Technology Pasadena, California
Edited for scientists, engineers, and involved laymen, ENVIRONMENTAL SCIENCE AN0 TECHNOLOGY will include coverage in the following areas: theoretical studies, and experimental results from the original papers of research scientists in the field r e p o r t s o f s c i e n t i f i c and t e c h n i c a l meetings review and survey papers in related fields broad coverage of related governmental activities broad coverage of industrial activities. SPECIAL PREPUBLICATION SUBSCRIPTION RATE: $3.50 for the first year for any order placed before January 1, 1967, postal charges not included. For orders placed after January 1, 1967 one-year subscription rates will be $5.00 for ACS members, $7.00 for nonmembers, postal charges not included.
POSTAL CHARGES: none Domestic $1 .OO PUAS & Canada $1 S O Foreign T o order send name, title or position, address (including zip code) t o :
ENVIRONMENTAL SCIENCE AND TECHNOLOGY AMERICAN CHEMICAL SOCIETY 1155.Sixteenth Street, N.W. Washington, D.C. 20036 Please indicate whether you are an ACS member,, and i f you are,. please use address in which your membership is recorded. You may enclose your check or ask to be billed later. Be sure t o add postal costs where applicable
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