In
CHEMICALS
reagent chemicals
Du Pont Adds Six Finishes
Fisher
Colloidal silica retards soiling of painted surfaces; primers aim at preventing rust
increases
RAVINGS
1953 was the year Fisher revolutionized the reagent industry by packaging its liquid chemicals by volume rather than weight— five years before any other manufacturer— to give you- safer, more economical use of shelf and stock space. Today, Fisher offers you such cost-saving advantages as six-pack units for still easier ordering, storage and larger discounts. For tomorrow, people at the Fisher Chemical Manufacturing Division, Fair Lawn, N.J., America's largest plant devoted exclusively to the production of reagent chemicals, are searching for new ways to serve you better, to give you additional savings in ordering, packaging, and storing. Why not look to Fisher for purity, service and savings in reagent chemicals when you place your next order? B-i09a
FISHER SCIENTIFIC INTHEU.S.A. Boston Buffalo Charleston, W.Va.
Chicago Cleveland Detroit New York
Philadelphia IN CANADA Pittsburgh Edmonton St. Louis Montreal Washington Toronto
America's large** Manufacturer-Distributor of Laboratory Appliances & Reagent Chemicals
46
C&EN JAN.
18, I9 60
OALESMEN FOR D U PONT'S finishes di-
vision have six new products to push this week. The six: a soil retardant finish for painted surfaces, three antirust primers for metals, and two antirust colored paints. Soil Retardant Concentrate, based on Ludox colloidal silica, is 15% Si0 2 , with an average particle diameter of 17 millimicrons. Its soil retarding action is the same as that of Ludox (C&EN, May 23, 1955, page 2244)—the small silica particles fill up the pores and pits on the surface so that dirt particles cannot enter them. The material is diluted to 1% silica, can be sprayed, brushed, roller-coated, or mopped onto the surface. Materials cost: 1 / 4 cent per square foot. Application cost: depends on labor rates, the company points out. Du Pont has tested it on storage tanks, equipment, buildings, tunnels, corridors, signs. After two years, the surfaces have shown little soiling, the company finds. And it works on any surface sloped enough to drain any excess applied. It may also find a market in home painting, but the company will not push this use until it has completed its industrial trials. • Antirust. One of the new primers is a blend of resin and oils plus red lead. Use: iron, steel, or tin surfaces that cannot be cleaned to bright metal. The second primer is a zinc chromate formulation for rust-free iron, steel, tin, and aluminum. The third is for galvanized iron and copper. The colored finishes are wrought-iron black and chrome-finish aluminum. All five can be topcoated with Duco enamels, Du Pont adds.
HPT (hexamethyl-phosphoric triamide), RMB (resorcinol monobenzoate), OPS (p-octylphenyl salicylate), and THBP (trihydroxybutyrophenone). Eastman pegs the first three compounds as ultraviolet stabilizers. H P T , a clear, light yellow, soluble liquid, is intended for vinyl plastics. In a weathering test, it protected polyvinyl chloride against degradation for seven years, the company says. The benzoate RMB has been used successfully in cellulosic plastics. The salicylate derivative, OPS, is earmarked for use in polyethylene and polypropylene. Its special feature, according to Eastman, is its compatibility with the resins. The last member of the quartet, THBP, is a crystalline antioxidant for poly olefins and paraffin waxes. Eastman's tests indicate that polyethylene with 0 . 1 % THBP is more than 21/2 times more stable to oxidation than is a control sample. In a paraffin wax at a concentration of 0.01% the AOM stability at 100° C. exceeded 1000 hours —compared to 135 hours for propyl gallate. C 1
• Textile processing lubricant, called Cirrasol HA, comes from Canadian Industries, Montreal, Que. Designed for spinning of synthetic fibers on cotton, flax, and dry-combed processing systems, the product also has antistatic properties, the company says. C2 • Nylanthrene green d y e for nylon yarn, stocks, and piece goods is marketed by Althouse Chemical, Reading, Pa. The company cites these properties: level dyeing, light and wash fastness, bright color. C3 • Liquid epoxy sealant for concrete floors is made by Permagile, Woodside, N.Y. The producer says that the product, called Armorseal, develops a tough, glossy skin, resists water, oils, greases, petroleum fuels, alkali, and mild acids. C4 • Aerosol
Eastman Offers Inhibitors Eastman Chemical Products will soon market four inhibitors to protect polymers from degradation. Now available in development quantities, they are
chromatography
reagents
are now available from Schuco Scientific, New York City. The Volutec line includes ninhydrin, isatin, bromcresol green, ferric chloride, p-anisidine hydrochloride, and aniline hydrogen phthalate. C5
C&EN
PROGRESS
REPORT
Commercial Chemicals Companies added these products to their lines during the past four weeks Suggested
Company
Material Sodium dispersions (in naphthalene or in mineral oil) l?4-Dichloro-2-butene n-Butyronitrile Organic intermediates (o-, m-, and p-azotoluenes; tetrachloro- and tetrabromo-p-benzoquinones; and tetrachlofo-, tetrabromo-, and tetraiodo-o-benzoquinones) Potassium Nitrate Alkylamines (mono-, di-, and tri-n-butylamines; mono- and diisobutylamines; and 3-methoxypropylamine) Indium (99.9% to 99.9997*) Alpha and gamma aluminas (finely divided) Phenylmercuric propionate Herbicide (2.3-dichloroallyl diisopropylthiolcarbamate) C14-labeled compounds (adenosine-8-C 14 and a-aminoisobutyric-1-C 14 acid)
Uses
Include
Active sodium source (available in 1-lb. lots) Intermediate
Acton Laboratories Newark, N.J. Du Pont Wilmington, Del. Eastman Chemical Products Kingsport, Tenn. Fabian Chemical Montreal, Canada
Intermediate and solvent (development quantities) Research intermediates (experimental quantities)
Fisher Scientific Pittsburgh, Pa. Henley & Co. New York City
Primary standard in fertilizer analysis by AOAC method Intermediates
High Purity Metals Hackensack, N.J. J. T. Baker Chemical Phillipsburg, N.J.
Semiconductors and industrial alloys
Metalsalts Hawthorne, N.J. Monsanto Chemical St. Louis, Mo.
Buffing and grinding compounds, phosphors, ceramics, and catalyst carriers (development quantities) Mildewcide and preservative for oleoresinous or aqueous paints Wild oats control
Nuclear-Chicago Chicago, 111.
Biochemical research
Available in commercial quantities unless otherwise noted
• Rust inhibiting primer, marketed as Jet-Dri by Consolidated Chemical and Paint, Brooklyn, N.Y., dries in 15 minutes. The prime coat resists blows, abrasion, and chemicals, CCP says, and is easy to apply and to cover. C 6
• Atco SA is added to its line of finishing agents by Metro-Atlantic, Centredale, R.I. The product gives antislip properties to synthetic fabrics, can be used in acid medium with other finishing and dye fixing agents, according to the company. C7
• Purifice Nl 7, a high molecular weight flocculant for use in potable water, is now available from Dow Chemical, Midland, Mich. Recently approved by the U.S. Public Health Service, the product works in concentrations below one p.p.m., the company says. C8
• Derivatives of benzotrifluoride—two
dozen of them—are available in research and pilot plant quantities from Pierce Chemical, Rockford, 111. The list includes most isomers of the monosubstituted amino, bromo, chloro, fluoro, and hydroxy derivatives as well as several aminohalobenzotrifhiorides. Potential use: Introduce trifluoromethyl groups, Pierce suggests. C9
available from Narmco Resins, Costa Mesa, Calif. Supplied in rolls, Metlbond 406 is dry and pliable at room temperature, softens, flows, and cures at high temperatures, Narmco reports. C 11 • Procion Brilliant Purple H3RS, a dye
for cotton and viscose rayon fabrics, has been introduced in the U.S. by Arnold, Hoffman & Co. The soluble dye is fixed by steam, has good print paste stability, shows wash, light, and perspiration fastness, and can be applied by any of the usual methods for type H dyes, the company says. The dye was developed by Imperial Chemical Industries in England. C 12
• Low residue mite control for flowers is the aim of Tedion 90, marketed by Niagara Chemical Division, Food Machinery & Chemical, Middleport, N.Y. The new formulation—907c tetrachlorodiphenyl sulfone, 10% wetting agent and inert materials—is safe, long lasting, and effective in low concentrations, Niagara says. CIO
• Epoxy casting and potting system
• Adhesive in tape form for sandwich structures and metal-to-metal bonds is
for electronic components where thermal and mechanical shock are a problem has been developed by Resin JAN.
18,
I960
C&EN
47
CHEMICALS
how to trap a ghost
Consultants & Mfg., New York City. The system—RCM Resin 8 and curing agent T—cures at room temperature and is nontoxic, according to RCM. C 13 • Natural carotenes concentrate has
Before solvent vapors fly out the window, many smart users literally wring them out of the air into liquid form, good as new, at costs as low as 2c a gallon—with activated charcoal recovery systems. Bonus: you may also raise worker efficiency with the right atmosphere, reduce heating costs.
been introduced by Nopco Chemical, Newark, N.J. for use as a coloring agent in pharmaceuticals, cosmetics, and foods. According to Nopco, the concentrate is rich in natural pro-vitamin A carotenoids and is dispersible and stable. C 14 • Self-curing latex for carpet backing has been developed by Naugatuck Chemical Division of U.S. Rubber. The one-package system, called Lotol L-4634, cures by drying, has no sulfur curing agents or accelerators. The compound shows no discoloration from heat or light, according to U.S. Rubber. C15
how to keep your spirits Distillers who store alcohol in barrels watch the level go down as the age goes up. Now—distillers may use activated charcoal to turn costly vapors into pure liquid form, fresh as the dew—with very attractive savings. Activated charcoal recovers many expensive vapors for as little as 2c pergallon.
activated carbon
• Reagents in 5-gal. polyethylene bottles in cardboard cartons have been added to Fisher Scientific's line. Reagents may be dispensed straight from the shelf by replacing the bottle cap with the pour spout cap furnished, attaching tubing and a clamp, and inverting the carton. Now available in PolyPaks: USP and ACS grades of formaldehyde; 10% formaldehyde solution; and Kjeldahl sodium hydroxide solution. Others will follow, Fisher says. C 16 • Series of w a x e s for carbon paper inks has been developed from a research program on montan waxes by American Lignite Products, lone, Calif. The company expects to go into production soon, has samples available now. The waxes will be priced between 45 and 65 cents per lb. C 17
We supply a complete line of activated carbons for every purpose; design and prefabricate complete purification, separation, and recovery systems to meet your particular needs. Write for Bulletin J-100 and recommendations on your specific application. Barnebey-Cheney, Columbus 19, Ohio.
Barnebey Cheney 48
C&EN
JAN.
18,
I960
• Epoxy novolac resin, D. E. N. 438, is marketed by Dow Chemical, Midland, Mich. Dow says the product combines the properties of epoxies and the high temperature performance of phenolics. Applications: adhesives, structural laminates, castings, printed circuit boards, and electrical insulation. Price: 68 cents per lb. in truckload quantities. C 18 • Molybdenum
disulfide
lubricant,
Molykote M-55-Plus, is made by Alpha-
Molykote, Stamford, Conn. A colloidal dispersion in mineral oil, the lubricant is recommended for high pressure metal working, can also be used as an additive in oils, tapping compounds, and hydraulic fluids, according to the company. C 19 • Nalcoag 1050, a 50% suspension of colloidal silica, has been added to its line by Nalco Chemical, Chicago, 111. Recommended as a surface treating agent, the fine particles fill surface pores, improve soil resistance and film strength, the company says. C 20 • Reprocessed
polyethylene
film
in
pellet form is available from Interplastics, New York City. Called Polypellets, the plastic can be used in injection machines, blow molding machines, or extruders. C21 • Ten intermediates are available from Eli Lilly, Indianapolis, Ind. They are: /?-ehloropropionic acid, deoxyanisoin, dimethyl chloroacetal, homoveratrylamine, cyclopentenyl acetone, cyclopentyl acetone, homoveratric acid, methylaminodimethylacetal, and hydrochlorides of 3-piperidinopropiophenone and 3-pyrrolidinopropiophenone. C 22 '• Herbicide, 2,6-dichlorobenzonitrile, is being field tested by Niagara Chemical Division, Food Machinery & Chemical, Middleport, N.Y. Niagara says early trials show that the chemical controls up to 99.2% of the wild oats and 98.9% of other annual grasses and broadleaved weeds. Best results were obtained as a preplanting or pre-emergent herbicide at 3 to 4 lb. per acre. C23
• Accelerator for natural, SBR, and nitrile rubber, MBTS is introduced by American Cyanamid, New York City. The company claims these advantages for the compound: shorter mixing cycles, lower reject rates, better dispersion, elimination of refining and masterbatching. C 24
Further useful information on keyed Chemical items mentioned is readily available . . . Use handy coupon on page 54 t
