CHEMICALS
Just a little Polyox resin will thicken water. A half ounce of the fluffy, white, granular resin in a pint of water gives a viscous solution like the one above
New High Polymer Entry C a r b i d e sees vast potential for w a t e r soluble p o l y e t h y l ene o x i d e ) resin family
1· Eieelro magnetic controT through*.*! ttie VSB of s t i m e r provides a reflux | ratio practically independent of \ through-put. Split drops a r e possible, | 2. Suitable for viscous liquids a n d vacuum o p e r a t i o n . 3. V a p o r velocity w i l l prevent cold reflux from running d o w n thermo couple w e l l . 4. Dynamic hold-up 0.4ML toluene @ 4.5ml./min. The N e w Ace ' M i n i - L a b " has m a n y more individual components, plus new assemblies for distillation, small-scale reaction w o r k a n d the N e w M a g n e t i c Semi-Automatic H e a d Send For New/ Supplement A de scribing the A l l - N e w Ace " M i n i - L a b . " Also in stock at our M i d w e s t e r n Division, Louisville, Ky.
KmiGMSS
INCORPORATED;
W ^ & V l Ν ELAN Ρ -f Ν ÉW J ERS É Y :
i r L J T ' " ' ' ' ' ''" M i d w e s l ^ n Division
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JLAST WEEK, Carbide came out with a new class of water-soluble resinshigh polymers of ethylene oxide (C&EN, Nov. 4, page 2 1 ) . The new plastics, which can b e cast, calendered, or extruded into tough, flexible film, have greater thickening power than competing materials, Carbide claims. Officials see these Polyox resins heading for such fields as textiles, drugs, cosmetics, detergents, and packaging. Carbide now produces them in pilot plant quantities at South Charleston, W. Va. Commercial production is scheduled next year, with a "major plant" pegged for 1960. Hints of the breakthrough first came in research papers given at the ACS meeting in September. Carbide says the resins have many properties of polyethylene, differing mainly in water solubility and melting point (65° C ) . Highly crystalline, the polymers have molecular weights around 2 to 3 million. Initial cost of the resins will be $1.50 per pound. Carbide figures that eventually t h e cost will drop to the 75-cent range, with an ultimate potential of 35 cents. These prices are for three
grades; the top viscosity resin will b e available shortly at slightly higher cost. A textile grade for sizing cotton is now 75 cents. Spokesmen say the way the resins resist biological attack is most important to textile mills in view of the emphasis on stream pollution problems. They feel proper use could make the installation of expensive waste disposal plants unnecessary. Standard two-year toxicological feeding tests are under way—with favorable preliminary results. Other areas of initial use include: • Thickeners for colloidal systems. • Stabilizers and thickeners (textile printing paste and rug backing, and adhesives, toothpastes, and cosmetics). • One shot packages. This intriguing use means such items as agricultural chemicals, inks, and detergents could be wrapped in resin film a n d heat sealed. Then the unit could be dissolved in water when needed. Other significant properties include low moisture pick-up in dry form, resistance to oils and greases (in the absence of w a t e r ) , and compatibility with such polymers as starch a n d polyv i n y l acetate). In addition t o water, the resins are soluble in acetic acid, acetonitrile, chloroform, hot aromatic hydrocarbons, and hot carbon tetrachloride. C2
TOMORROW'S PRODUCTS TODAY.. .THROUGH ENJAY PETROCHEMICALS
AL^«3^
*^&?&~~"\
*5£*2
^Ά
**%&
idients for LACQUER finishes that brighten up the working day! w
B r i g h t , modern furniture with a high-gloss lacquer finish is becoming more a n d more popular in today's offices. Lacquer manufacturers who use E n j a y solvents in their formulas are assured of high purity, uniform boiling range a n d carefully controlled evaporation rates. E n j a y petrochemicals play an i m p o r t a n t role also in t h e formulation of m a n y other surface coating products, such as, vinyl lacquers, water-base paints, enamels, a n d paint a n d varnish removers. T h e modern, well-equipped E n j a y Laboratories h a v e recently been expanded and a r e a t your service in t h e application of a n y E n j a y petrochemical. Call or w r i t e for further information.
Enjay offers a widely diversified line of petrochemicals for industry:
Pioneer in Petrochemicals
ALCOHOLS & SOLVENTS: Lower Alcohols, Oxo Alcohols, Ketones and Solvents; OIL & FUEL IMPROVERS: Detergent Inhibitors, V-I Improvers, Oxidation Inhibitors; CHEMICAL RAW MATERIALS: Olefins, Diolefins, Aromatics; ENJAY BUTYL RUBBER & VISTANEX.
ENJAY COMPANY, INC., 15 W. 5 1 S t STREET, NEW YORK 1 9 , Ν. Υ. A k r o n , B o s t o n , C h i c a g o , D e t r o i t , Los Angeles, N e w O r l e a n s , T u l s a
NOV.
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1957 C & E N
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JCHEAAICALS
Excerpts From The Chemical Hall of FAME
James Mason Crafts (7839-7977; In 1911 Crafts was award ed the Rumford medal by the American Academy of Arts and Sciences for his investigations into ther mometry that were so ac curate they are still re garded as classic. By 1911 Foremost's E l Dorado Division had been
-fOREMOSI
stressing purity and uniformity in their production control for nearly two decades.
F A M E
FATTY
ACIDS • METHYL j ESTERS OF COCONUT OIL
rally
Caprylic
Acids M6thvl Bcrorc
Eldhyco*
Coconut
Capric
Palmitic
Myristic
Caprylate Eldo 18* Caprate Coconate Myristate Caproate
B O LCI Ο
For Example:
Laurie
Laurate Palmitate
«Τ.Μ. Re*.
ELDO C A P R I C A C I D 9 4 - 9 7 % pure. (Purest Capric Acid com mercially produced.) Readily available a t an attractive price. Eldo*s high stand ards give you a better, more uniform end product.
SH H U ^ A For samples and specifications, write Dept. Ν -fOREMOST FOOD AND CHEMICAL COMPANY P. O. Box 599, Oakland 4, Calif.
ELDORADO
in Detroit: Harry Holland & Son, Inc.
In New York: H. Reisman Corp. In. Chicago: M. B, Sweet Co.
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C&EN
In Cincinnati: Howard Dock
NOV. I I ,
1957
In Cleveland: F. W. Kamin Go.
In Boston: N. S. W i t e . 1 Sons In Minneapolis: M. H. Baker Co.
Carbon Gets info Shape Activated carbon is shaping u p . National Carbon is now making cubes and wafers of the material. This marks the first time m o l d e d shapes of acti vated carbon have been o n the market, the company says. Almost any size a n d shape can b e made, according to National Carbon, but t w o sizes o f wafers are standard. One is about ! / 8 in. thick and 1 V 4 in. in diameter. I t ' s designed t o fit into caps of pharmaceutical bottles t o ab sorb odors. The other is about 3 / 8 in. thick and 1V2 in. in diameter. This larger one is for larger bottles, and it c a n b e used for odor control in potato chip packages and the like. T h e cube measures about 3 / 8 in. on a side. Cubes act as "getters" for hermeticallysealed relays and precision instruments. A desiccant—such as silica gel—can b e molded into the shapes along with the activated carbon. I n this w a y , t h e shapes can be used for moisture con trol in addition to odor a n d vapor con trol, t h e company says. C3
• Du Pont plans t o make film from Teflon 100-X, n o w in t h e experimental stage. T h efilmwill b e added t o t h e company's line of industrial a n d pack aging films. D u Pont expects t h e film to find use at high temperatures. C4 • Silicone porting emulsion, n o w being produced by Union Carbide, is a stock emulsion of dimethyl silicone oil. Used to make shell molds in foundries, it gives good release of patterns with a low film build-up, Carbide says. C5 • New thermal insulation compound, developed hy Cessna Aircraft, is made up of asbestos "shorts" mixed with sili cone adhesive. T h e mixture can b e sprayed or brushed onto most plastic or metallic surfaces, and it will set u p and cure at room temperature, t h e company says. C6 • Patent Chemicals is producing a new dye concentrate in fluid form t o color gasolines and other petroleum products. The concentrates come in many colors, and they can b e p u m p e d a n d metered into the finished fuel, according to t h e company. C7 • Emerson & Cuming has developed a one-component pack-in-pla^e foam for
hat happened to the price of oxygen ? The price of bulk oxygen has dropped about 80% in 12 years, while most other prices have risen. Oxygen is now being produced in large quantities for a few dollars per ton. Oxygen isn't the high-priced chemical it used to be: Now, it's a lowpriced tonnage commodity—a utility purchased like electricity or water. The price drop is the real reason oxygen usage has climbed beyond 70 billion cubic feet per year. W h y w a s it costly?
New Text
New Text
Hundreds of Air Products package generators and tonnage plants are now on stream . . . capacities range from H ton to 500 tons per dayNOV.
II.
1957
C&EN
65
CHE/AICALS B U R RE LL
*2%*fe Sfeien/eé/à
STAN Therrno-Recording
$&4tof£€fiAeb4?'
TOΝ Balance
A superior laboratory balance that heats, weighs and records simultaneously. "Heat-to-constant-weight" is accomplished easily in research or for process control.
ELECT-RIG LOADING
embedding electronic circuits, filling voids, and for use as thermal insulation. The material comes in a form similar to damp sand. It can be used up to 500° F . and needs no mixing, the com pany says. C8 • Plastic protective coating, devel oped by Mono-Seal Products, is a blend of silicones and epoxies. It has good corrosion, impact, and moisture resistance, the company claims. And, Mono-Seal adds, it contains no plasticizers or oils. C9 • Redei/ Inc., has a new thread sealing compound for liquid oxygen systems. The compound has a very low impact sensitivity, claims Bedel. CIO • Dow Chemical is changing the name of its Styrex 767 plastic molding ma terials. The new name for the mate rials: Tyril 767. C1 Λ • El-Tox is a new rnetallo-organic slimicide made by United Chemical. The compound can be used in doses as low as 200 parts per billion, and it is ef fective against slirne found in cooling towers, the company claims. C 12 • Nucleonic Corp. of America is now
marketing a group of carbon-14 labeled compounds. C13 • N e w grade of polystyrene is the resuit of a two-year research program by Sheffield Plastics. Shields and pans made of the new material, says Shef field, have a velvety surface finish to ab sorb stray light, are flexible, and resist discoloration. C 14 STANTON Thermo-Recording Balance, Model TR-1 Electric weight loading, twin electronic recorder and standard furnace with simple program control. A cam, which can be modified, provides uniform rate of heating. Sensitivity 1 mg. Burrell Cat. N o . 2 - 5 6 9 - 4 1
Other models are available for thermo-recording or recording only with sensitivities of 1 mg. or 0.1 mg.
BURRELL
Furane Plastics, is colorless and nonstaining, according to the company. The hardener will fit into the develop ment of epoxies with high temperature properties, the company says. C 15
$4,550.
Price listed is F.O.B. Pittsburgh, Pa,
Ask for Bulletin No.
• N e w curing agent for epoxies, by
• Sun Oil has a new refrigeration oil. The oil 'has a low floe point, good sta bility, and copper-plating resistance, the company claims. C 16
329
CORPORATION
Scientific Apparatus and Laboratory Supplies 2 2 2 3 FIFTH AVENUE, PITTSBURGH 19, PA.
Further useful information on keyed Chemical items men tioned is readily available . . .
Use handy coupon on page 76
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