NEW PRODUCTS Chemicals and Materials
Weldable Phosphate Coating for Steel H U M I D ITY
OILED STEEL
SALT SPRAY
LEAD PHOSPHATE OIL
Development of the first weldable coating for steel has been announced by International Rustproof Co., a manufacturer of rustproof chemicals. The new coating does not impair the weldability of the steel substrate, and lead phosphate coating, for example, can be applied to steel at the mill during fabrication, serve as a protective corrosion barrier during transit and storage, and then remain on the steel during subsequent forming and drawing operations. I n addition to weldability, the coating affords good protection against rust, reduces friction in drawing operations, creates an excellent base for electroplating operations, and is highly resistant to removal by all but the strongest alkalies and mineral acids. The coatings may be applied either by spray or immersion techniques at temperatures between 80” and 100’ F. Satisfactory coatings can be formed in as little as 5 seconds by spraying, and about 2 minutes
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OILED STEEL
by immersion coating of the material. The coatings consist of hexagonal crystals about 10 p in size and similar in appearance to apatite (a complex, calcium fluoride-calcium phosphate). T h e 10-p size is considerably smaller than the 25 p orthorhombic crystals found in the smallest size crystalline zinc phosphate coatings. The smaller the crystal size, the denser the coatings. Welding tests conducted by automotive laboratories have shown that the coated steel welds with the same ease as uncoated steel. Under test conditions, successive spot welds were made on sheet steel. Steel provided with the coating passed this test successfully. The required welds were completed and all were of substantially the same button diameter and free from burring. Steel treated with iron or zinc phosphate coatings, however, could not be satisfactorily welded under the test conditions. Rust protection of assembled parts
LEAD PHOSPHATE OIL
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is improved because the mill-applied coating does not have to be removed prior to drawing, cleaning, or welding. Thus, assembled parts will retain the protective phosphate coating at welded seams and in interior or “boxed” sections. This affords corrosion protection in areas never before covered by conventional phosphate coatings applied after the part is fabricated. T h e coating provides an excellent paint base and reduces power requirements in electrocoating compared with zinc phosphated steel. I t is also believed that lower power requirements may be accompanied by better throwing power and more uniform paint coverage. Preliminary investigations indicate that the overall cost of spraying the coating to steel will not exceed that of other conventional phosphate coatings. International Rustproof Co. 201 (Continued on page 62) VOL. 5 9
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SOLID SILICONE RESIN
SPRAY MOLD PROTECTIVE PACKAGING
PERFLUORINATED FLUIDS
T h e material SR-350 is used in the production of precision-molded parts. I t is a solventless, dry, friable silicone resin a t room temperature. Molded parts made from SR-350 mixed with mineral fillers may be used for making precision electrical components such as insulators, connectors, terminal boards, and other components where precise tolerances, outstanding surface finish, and excellent electrical properties are required. Parts made using SR-350 as the binder in a mineralfilled ceramic compound may be used a t temperatures up to 2000' F. or higher depending upon the choice of filler. General Electric co. 202
T h e adhesive-coated plastic beads are sprayed to form a one-piece cocoon cushion around fragile parts for shipping protection. Applications are found wherever identicalpart volume does not warrant the cost of premolded foam materials. T h e sprayed cocoons follow the contours of intricate and odd shaped parts to give overall cushioning. Thicknesses are easily varied to suit the weights and fragility requirements of different items. Permanent bead adhesion further prevents the protected parts from shifting or settling to the bottom of containers during transit. T h e cocoons have minute moisture absorption, will support up to 40 times their own weight, are rot-proof, vermin-proof, nontoxic, self-extinguishing, lightweight, have a high load bearing capacity, high energy absorption, noncorrosive, and are odorless and clean. F M C Corp. 205
The new fluids are described as linear oligomers of perfluorinated ethers with boiling ranges from SO" to 350" C. hlolecular weights range from a few hundred to several thousand. Some physical properties attributed to the fluids are exceptionally wide liquid range, extreme chemical inertness, excellent thermal stability, good temperatureviscosity relationships, excellent dielectric properties, and good lubricating properties. Suggested applicattions include use in transformtrs, capacitors, rectifiers, and microwave units where efficient dielectric fluids are required. The compounds are also suggested for use as water repellents, releasing and antiseizing compounds, and plasticizers for fluoropolymers. Peninsular ChemResearch, Inc. 208
POLYMER REFERENCE STANDARDS
Twelve polybutadienes, certified as to structure or molecular weight distribution by the latest analytical techniques, are available for use in basic research and analytical work. Four of the new reference standards are linear, narrow molecular weight distribution, and hydrogenated polybutadienes certified as to number average and weight average molecular weight. Three of the polybutadienes are high in either cis, trans, or vinyl content and can be used to study the effects of structure on polymer properties or to calibrate an infrared spectrometer for determination of unsaturation in polybutadienes. Five linear polybutadienes with narrow molecular weight distributions can be used as molecular weight standards in gel permeation chromatography and for studies relating Doivmer rheology to molecular weight distribution. Phillips Petroleum Co. 203 V
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The material is available for use in the university and collrge organic laboratories where the handling of liquid bromine is a potential safety hazard. T h e reagent grade bromine is carefully absorbed on charcoal. This safety specialty chemical can be used for brominating organic compounds on the semimicrolevel and for preparing test reagent solutions for organic and inorganic identification. Halogen release is via extraction with organic solvents, gentle heating of charcoal, or passing of heated air or steam through column. Fisher Scientific Co. 206
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LIQUID DETERGENTS
Cold sulfonated liquid detergents in clear or lotionized form may be purchased in bulk, perfumed or dyed to the buyer's preference on a contract basis. T h e new blends are manufactured by a patented ice cold process under vacuum, which prevents color-causing oxidation. T h e three blends cover a wide range of compositions. Formulations consist of anionic-amide or anionicnonionic blends. These blends provide excellent cleansing performance, copious foam, and rich viscosity. Pilot Chemical Co. 204 62
BROMIN E-CHARCOAL REAGENT
NYLON DYEING AID
A new material for the dyeing of texturized and regular filament nylon with a minimum of barrt using selected acid colors is a \ ailable. T h e material promotes leveling in the reduction of barrt in the application of selected acid dyestuffs to nylon knit goods of texturized or regular filament yarns. The product exhibits excellent leveling. and releveling properties under severe a s well a s under normal d)eing conditions. I t is a stable liquid which readily dissolves in water a t ordinary temperatures to form a completely clear, slightly alkaline solution. I t can be mixed under all usual dyeing conditions and is free-flowing even after storage a t 40' F. General Aniline & Film Corp. 209
ONE PART ENCAPSULANT
An epoxy encapsulant with a density of 14 lb. per cubic foot is supplied as a powder. I t is vibrated into the cavity to be filled and then heated to effect cure. Cure temperatures a s low as SO" C. may be used where components cannot be exposed to higher temperatures. Where speed of cure is important, higher temperatures may be used. It has the unique ability to infiltrate small voids and crevices. During cure the powder converts to a foam with no change in volume arid consequently exerts practically no pressure on sensitive elements. Emerson & Cuming, Inc. 207
INDUSTRIAL A N D ENGINEERING CHEMISTRY
MICA- BASED I FI SU LATlN G MATER1A L
T h e material is made of natural mica platelets, bonded with boronbased silicone resins. I t closely approximates the qualities of natural mica with regard to electrical, mechanical, chemical, and thermal properties. Because of its economy, high temperature resistance, and stable insulation of high mechanical strength, it is recommended for use as a self-supporting carrier of coils in appliances and indsstrial apparatus, and in washers, gaskets, and substrates. I t is available in thicknesses of 1 5 to 40 mils. Columbia Technical Corp. 210
SILICONE FLUIDS
LITERATURE
T w o families of fluids are available i n a range of viscosity from 0.65 to 100,000 centistokes. Inertness and stability are primary assets of the dimethylpolysiloxane fluids. They are stable to heat and oxidation and do not react with water, dilute aqueous acids and bases, oxidizing materials, and most metals. Viscosity a n d thermal conductivity vary slightly with temperature changes. Dielectric properties are good, the fluids are compressible, a n d they have mechanical shear resistance. Among the industrial and consumer applications for these fluids are shock absorbers, liquid springs, controlled speed drives, transformers, heat treatment, polishes, a n d cosmetics. T h e fluids are nontoxic a n d physiologically inactive. Standard containers for the fluids are in pint a n d 1- 5 - a n d 55-gal. sizes. Stauffer Chemical Co. 211
Porous Metals. The 6-page bulletin discusses the major advantage of porous metals and shows the multilayered materials for special applications that have a different porosity or metal in each layer. A list of applications and advantages, a specification list for stock porous metals, a list of multilayer materials that are available on order, a description of the research capabilities and facilities for providing high quality porous metals are included. Union Carbide Corp. 214
HOT MELT ADHESIVES
Four high performance, solid polyamide resins are available for hot melt adhesive applications where greater strength a n d toughness are required. Each of these dimer acidbased resins has its own unique combination of toughness, stability, softening point a n d viscosity, low water absorption, a n d light color. They consistently show minimum tendency toward age embrittlement in critical adhesive applications. These adhesives are easily applied by automatic dispensing equipment, such as nozzle or wheel applicators, and by manually operated hand guns, roller coating, or dipping. Emery Industries, Inc. 212 POLYMERIC PLASTICIZER
The material features exceptionally light color with a wide spectrum of compatibility with numerous polymers a n d resins including polyvinyl acetate a n d polyvinyl chloride. It offers resistance to migration and volatility as well as to oils, fats, a n d hydrocarbons. It is recommended for use in adhesives, vinyl films, plastisols, lacquers, a n d pigment grinding materials. Wallace & Tiernan, Inc. 213 M o r e information i s as near as your mailbox. Just circle the number of the item in which you are interested on the Readers’ Information Card.
Silicone Greases. A 12-page selector guide, CDS-784, is available. This guide illustrates how silicone greases have provided solutions to difficult problems in heat transfer, electrical insulation, and lubrication in temperature extremes. Along with typical applications, the guide discusses physical and chemical properties of the silicone greases. General Electric Co. 215 Chemical Pulping Data. The technical booklet, “Preparation of Kraft Cooking Liquor,” discusses in detail how to prepare Kraft cooking liquor from liquid sodium hydrosulfide and caustic soda. The testing procedures and safe handling and unloading procedures for the chemicals are included. 216 Stauffer Chemical Co. Castable Refractories. The booklet presents information on the selection, preparation, and placement of gunned or cast refractories for all types of service. I t contains application data for more than 30 brands of castable refractories, classified in fireclay and highalumina, basic, and lightweight insulating categories. Illustrated with photographs and diagrams, the booklet provides helpful information on refractory support and design, as well as instructions on mixing, consistency, installation, curing, and initial heat-up. Harbison-Walker Refractories Co. 217 Liquid Epoxy Resins. Bulletin No. 171-141C describes the composition, characteristics, and uses of these resins. Also discussed are curing agents, reactive diluents, modifiers, fillers, and formulation processing techniques. Comprehensive data on resin performance plus information on storage and handling are included. Dow Chemical Co. 218 Corrosion Data Charts. The corrosive effects of 400 different materials on 18 types of metals are shown in Technical Service Bulletin 101. The charts indicate the corrosion resistance of the metals to various concentrations of more than 250 chemical salts and acids, as well as to more than 100 common materials such as water, glue, fruit juices, milk, meats, alcohol, turpentine, and many others. Nooter Corp. 219
Anti-Stick Agents. A 4-page brochure describes applications for these agents in the processing and fabricating of plastics and rubbrr and tells how various sticking problems normally encountered in industrial production can be solved through use of proper release material. The brochure describes various release agent applications for molding, extruding, calendering, laminating, embossing, packaging, and labeling operations. Other applications of release agents are covered in Bulletin No. 01-119. Dow Corning Corp. 220 Precious Metal Electrodeposits. This 18-page illustrated booklet will aid the designer and engineer in the selection of the correct precious metal for a particular application and in selecting the most economical metal to meet his particular requirements. ?‘he booklet includes charts illustrating the density, melting point, coefficient of thermal expansion, electrical resistivity, reflectivity, and annealed hardness of the precious metals. An extensive reference section is also provided. International Nickel Co., Inc. 221 Silicone Lubricants. Complete technical data on extreme temperature service for hydrodynamic, boundary, and extreme pressure lubricating needs are featured in an illustrated 28-page brochure, No. S-1OB. The publication includes information on applications, properties, high temperature performance data, and design considerations of Versilube silicone fluids. General Electric Go. 222 Sodium Ethylate. Fifty-nine chemical reactions involving sodium ethylate are described for organic chemists in a 12-page booklet. They cover inorganic reagents, simple organic reagents, condensations involving carbonyl or carboxyl groups, reactions of organic or nitrogen compounds, and miscellaneous types of compounds. A detailed bibliography on the material is also included. FMC Corp. 223 Vinyl Chloride Monomer. Bulletin 170-233 describes the general characteristics and physical properties of VCM. The bulletin also discusses the various possible hazards and controls in handling, transporting, and storing the gas in pure form. Emphasis is placed on special protective equipment, employee skills, and safety precautions, as well as operation equipment and waste disposal. Dow Chemical Co. 224 Solvents, Oils, and Waxes. A 4-page brochure lists solvents, oils, and waxes used by processors and formulators. The brochure lists the kinds of materials by both product class and industrial application. Six examples are illustrated, and industries for which products are listed are included. Mobil Oil Corp. 225 VOL. 5 9
NO. 4
APRIL 1967
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