PRODUCTION
NEW CHEMICALS AND SPECIALTIES Domestic Montan W a x
Foam's a fraud...Kill it With
DOW CORNING ANTIFOAM A
Adhesive f o r Silicone Treated Surfaces
T o get the m o s t o u t of your p r o c e s s e q u i p m e n t , add a trace o f D o w C o r n i n g Antifoam A and use the s p a c e you've b e e n w a s t i n g o n foam. Y o u ' l l p r o c e s s m o s t of your m o s t v i o l e n t foamers, e v e n under vacuum o r c o n t i n u o u s heat, without w a s t e o r hazardous overflow. That's because D o w C o r n i n g Antifoam A kills foam faster and in a w i d e r variety of foamers than any o t h e r material k n o w n . Practically o d o r l e s s , tasteless and non-toxic, i t is safe to u s e in food and drugs at c o n c e n trations up to 10 parts p e r million—many t i m e s the c o n centrations normally required. That kind of efficiency m a k e s D o w Corning Antifoam A the m/>st e c o n o m i c a l as w e l l as t h e m o s t versatile d e f o a m e r available.
Silicone coated surfaces can now be strongly adhered with an adhesive developed by Polymer Industries, Inc. GlasWeld functions in high-speed gluing machines fully as well as the best standard adhesives. According to the manufacturer silicone coated paper, wood, ceramics, and metals can be successfully adhered with this line of adhesives. The Glas-Weld adhesives are said to b e adherent to such surfaces as opal glass, brown glass, borosilicate glass, Pyrex, and fire-polished or case-hardened glasses, as well as silicone finishes. C S 2 Hydrophobic Resins
See for Yourself Send Coupon Today for Your FREE SAMPLE
L
DOW CORNING"!
à
SILICONES *
Hi
Dow Corning Corporation, Dept. AR-15 Midland, Michigan
Hi Hi
Please send full information and a free sample of Dow Corning Antifoam A. A.
jH |H |H
H|
Name
••
HI
Company
*H
HI
Address
H J
City
JH Zone
State
|H
ATLANTA · CHICAGO · CLEVELAND · DALLAS · LOS ANGELES NEW YORK · WASHINGTON. 0 . C.
1148
Humacid Co. has sbirted production of montan wax from lignite. The company says that a feature of their process makes possible a separation of the various constituents comprising domestic montan which results from the primary extraction and subsequently compounding these constituents under chemical control. This is said not only to assure uniformity of product but to allow for modifications of the wax that more readily adapt it t o a wider end use. The residue from the wax operation is converted to humic acid for use in the treatment of oil well mud in drilling operation. CS 1
For further information on any keyed item mentioned here, see coupon on page 1154 Though t h e company will not reveal the exact chemical composition of Noraset, at least until patent rights have been established, t h e y do say that they are monomer ic solvent-soluble and water dispersable heat-setting resins, involving simple impregnation of the cloth, followed b y squeezing, drying, and baking at elevated temperatures. They say that being monomeric and water dispersable in nature, the n e w products penetrate not only into the yarn and cloth structure but into the individual fibers as well. During the curing these compounds are converted into insoluble and infusible resins within the fibers, undergoing chemical combination with the fiber molecules—hence jthe fabrics are durable to washing and dry cleaning. Noraset is in texture much like whipped cream, or shaving soap lather, though perhaps whiter in color, with no odor. CS 3 Insulating Film A plastic film for electrical insulating applications involving high temperatures, high frequencies, and high voltage is made b y Minnesota Mining and Manufacturing Co. The film-Scotch brand P T F film (made from Teflon)—is manufactured b y a process that produces fewer air entrapments i n t h e film than any previous i n sulation material of its type, the 3M company said. T w o layers of 3-mil film are said to form a continuous surface insuring positive dielectric protection at a 5000 volt level. The translucent film withstands temperatures from —100° to 500° F. and meets
An· entirely new family of hydrophobic resins, called Noraset, that impart to fabrics durable water repellency and spot resistance, durable resistance to wrinkling, creasing and mussing, and with durable stabilization against shrinkage and stretching, are being made by the Sun Chemical George W . Ullman (center), president, and Ernest Nathan, Corp. Warwick vice president, of the Sun Chemical Corp., watch as Donald Chemical Co. Div. Gagliardi, director of t h e developments laboratories of the WarThe company says wick Chemical Co. Division, demonstrates the water repellent properties of fabric treated with Noraset hydrophobic resins that previously it has been common practice to mix a water repellent, a shrinkage control agent, and a crush resistant agent to obtain desired modern multiple effects on textile goods. So far most of Warwick's emphasis has been in the rayon field, but they claim considerable promise on cotton, cotton-nylon blends, nylon-rayon blends, wool-rayon blends, and several other types. CHEMICAL
AND
ENGINEERING
NEWS
both Class Β and Class Η requirements. It is nonflammable, will not track; resists all solvents with the exception of certain boiling chlorinated solutions; is unaffected by all types of impregnating varnishes, and will not absorb moisture. It resists cold flow under pressure, has a tensile strength of 7800 l b . / s q . in., and has some stretch with moderate winding tension, making it adaptable for handling by automatic wrapping machinery. The film is available in 36-yard rolls in widths from 0.25-in. to six in., and in thickness of three, five, 10 and 15 mils. CS 4
3-Aminopropanol American Cyananiid Co. has made S-aminopropanol available in trial lots for the first time for evaluation in the chemi cal and allied industries. The chemical properties of 3-aminopropanol are similar to those of other amino alcohols having primary amino and hydroxyl groups. How ever, the three-carbon separation between the two groups results in behavior more typical of the individual groups than is found in currently available amino alco hols. CS 5
iz^S^â Without ί Marasperse f
These p h o t o m i c r o graphs* s h o w vividly h o w Marasperse dis perses insoluble parti cles i n w a t e r a n d overcomes their natu ral tendency to floc culate.
Multi-Purpose Acid D e t e r g e n t An improved acid-type detergent made by Diamond Alkali is designed to simplify, speed-up and systematize a number of both daily and occasional cleaning chores in dairies, creameries, milk and ice cream plants, and cheese factories. Known as Diamond Powdered Acid Cleaner, it is a specially-developed in hibited acid and said to provide a scien tifically blended and balanced combina tion of inorganic salts and wetting agent, making it suited for regular daily clean ing of equipment. CS 6
With Marasperse
(*Shown—Actual Photomicrographs of Carbon Black in W a t e r — 8 6 0 X )
This powerful dispersing action of Mara sperse gives three important benefits. 1. The settling of insoluble particles in water suspension is prevented or greatly retarded. 2. The fluidity of slurries is marked ly increased. 3. Slurries remain fluid even with greatly increased concentrations of solids.
W h o Makes I t ? The National .Registry of Rare Chemicals, Armour Research Founda tion, Illinois Institute of Technology, 35 West 33rd St., Chicago, 111., is in terested in locating sources of supply for the following chemicals: Calcium palmityi phosphate Methyl aluminum diehloride Ruthenium fluoride o-tert-huty\ toluene 3,5'-Diiodothyronine Avid in Coprostanone 2,3-Benz-9-anth rone Pipeline 2-Ethylhexanedithiol-1,3 Quinoline-8-carboxylic acid 9-Anthraldehyde Triethylgermanium hydride 9,10-Dihydrophenanthrene Renzoquinonecarboxylic acid Biliflavin Methyl ammonium chromic sulfate 3-Ethyl-2-aminophenyl henzothiazoline 1,3,6-Trihydroxynaphthalene Coronene Luciferin V O L U M E
3 0,
NO.
11
»
»
If your process or the use of your prod ucts involves water suspensions of in soluble materials, investigate the use of Marasperse for increased process efficien cy and superior product performance.
Marasperse is used in a wide variety of applica tions—in the dispersion of; DYESTUFFS INSECTICIDES PIGMENTS WAXES ASPHALT OIL WELL DRILLING MUDS CARBON BLACK STARCHES GYPSUM CLAYS CEMENTS RUBBER ANTIOXIDANTS I N THE FORMULATION OF INDUSTRIAL CLEANERS
. . . and new uses are con stantly being developed·
mmwm crnpamms) UMuO
Write for information on MARASPERSE prod ucts. Y o u will receive complete and technical data. Our research staff w i l l welcome t h e op portunity to cooperate w i t h you· M A R C H
17,
1952
1149
