New Commercial Laser Has ΙΟ-Watt Output A continuous wave laser capable of producing at least 10 watts, multiple mode, of continuous energy at a wave length of 10.6 microns has been de­veloped at Perkin-Elmer Corp., Nor-walk, Conn. The molecular laser, des­ignated Model 6200, uses a mixture of carbon dioxide, nitrogen, and helium and has an efficiency of 5%. Power output of the laser is about five times greater than that previously available from a commercial unit.

The 10.6-micron wave length is ab­sorbed by almost every organic mate­rial, the company notes. And because of an "atmospheric window" at this wave length, the laser's power isn't attenuated very much when trans­mitted through air. Uses for the unit include welding, high-speed evapora­tion, cutting of both organic and inor­ganic materials, spectroscopy, surgery, and communications.

The laser, including a self-contained power supply, weighs 175 lb., less gas supply and pump. Input power is 60-cycle, 115-volt a.c. Price of the unit is $8950.

GE Develops Coating For Concrete Repair General Electric is adding to the already long list of uses for silicone rubber-based materials. The use is in coating and repairing concrete, metal, wood, or plastics when these materials are used in a horizontal or graded plane. The GE material is called sili­cone traffic topping.

Silicone traffic topping is a mixture of silicone rubber and specially graded silica reinforcing material. Prior to application, a liquid catalyst is stirred into the compound. Minimum pot life of the mix is 30 min., although the actual pot life varies with humid­ity. Before the catalyzed mix is troweled into place, a primer, which dries in 20 to 30 min., is applied to the surface to be coated. Cure time for the suggested mix of rubber and cata­lyst is about 16 hr.

The compound is generally applied to highways, patios, wood floors, or other traffic-bearing surfaces in a 1 / 8 -in. layer, which cures to a concrete­like texture. However, GE says, be­cause of the cured compound's ability to bend, to elongate (8 to 10%), to resist water and acids, and to resist weathering, the compound exhibits greater durability than concrete. Also, exposure to temperatures as low as - 6 5 ° F. or as high as 300° F. does not damage the cured compound.

GE expects the compound to be widely used in surfacing and repairing airport runways and highway bridges. A test patch on a thruway bridge north of Albany, N.Y., is now going through its second winter; GE says that the coating is standing up well. The company feels that its material is superior to currently used coatings such as epoxy, polyester, or urethane, because it doesn't become hard or brittle and it is waterproof.

The estimated installed price varies from $1 per square foot for large jobs to $1.75 a square foot for small jobs. Price of the compound itself is $11 to $17 a gallon; a gallon covers 16 to 17 sq. ft.

Ultrasonic Generator Severs Molecular Bonds An ultrasonic generator capable of 800 kilocycles per sec , 80-watt opera­tion, and costing $870 has been devel­oped at Macrosonics Corp., Carteret, N.J. The unit, Multisons Model 250 FF, consists of a light-weight power unit (17 X 19V2 X H in.) operating on 115-volt a.c; an insulated, flexible cable; and a cylindrical piezoelectric transducer.

When submerged in a liquid, the transducer produces a highly direc­tional acoustic field. When operating at 800 kilocycles per sec. in water, a typical wave generated by the unit causes a molecule to move only 0.17 A. However, the molecule will have an acceleration 490,000 times greater than the force of gravity. Under such acceleration, the molecule's maximum instantaneous velocity reaches 86 cm. per sec , and the pressure at any given point in the water changes from +12.75 atm. to -12 .75 atm. 800,000 times each sec.

The transducer is noncorrosive in mildly acid or alkaline liquids. It is powerful enough to irradiate through a 0.004- to 0.008-in. Mylar mem­brane, thus avoiding direct contact with the irradiated liquid.

The turbulence thus created, the company points out, is enough in many instances to sever molecular bonds, erode hard-to-dissolve parti­cles, smash cells, and bring reactants together with high impact. The unit therefore has many potential uses, in­cluding dispersion, emulsification, par­ticle coagulation, catalyst activation, filtration acceleration, and cleaning.

Features Features solid-state circuitry which gives

rapid readout of either temperature or humidity

Has built-in heater that maintains sam­ple at desired temperature

Operates by driving heat through a wafer-shaped sample

C&EN PROGRESS REPORT EQUIPMENT

These items have all been mentioned editorially in C&EN in the past month. If you haven11 already sent for information on them, just check the appropriate key numbers on the coupon on page 50, and C&EN's Readers' Information Service will forward your request to the manufacturer.

INSTRUMENTS AND CONTROLS . . Product

Temperature/humidity meter Ε 60

Blood pH determination system (Model 12BRS)

Thermal conductivity meter (Colora Thermoconductometer)

Ε 61

Ε 62

Company Apparatus Controls Division

Honeywell, Inc. Minneapolis, Minn.

Corning Glass Works Corning, N.Y.

Dynatech Corp. Cambridge, Mass.

{Continued on page 48)

C&EN PROGRESS REPORT

46 C&EN FEB. 14, 1966

Need phosphate plasticizers in the Chicago area? Better call your new FMC distributor. He provides speedy service on all plasticizers. And as an FMC distributor, he offers industry's most complete line of organic phosphates. Call: Argenta, Illinois Bronoco Solvents and Chemicals Company, P.O. Box 128/795-4911 Chicago, Illinois Bronoco Solvents and Chemicals Company, 5000 Merrimac Avenue/735-7700 C. P. Hall Co. of Illinois, 5245 West 73rd Street/767-4600 Great Lakes Solvents Cov Inc., 1750 No. Kingsbury Street/664-3500

Rockford, Illinois Great Lakes Solvents Co*, Inc., 1101 Acorn Street/968-0741 Villa Park, Illinois Organic Chemicals Division, FMC Corporation, 649 N. Ardmore/834-9500 South Bend, Indiana Stevens Oil Company, Div. of Ashland Oil & Refining, 1817V2 W. Indiana Avenue/ 289-6313 Milwaukee, Wisconsin Great Lakes Solvents Co., Inc., 5737 West Mill Road/353-5080

ORGANIC CHEMICALS DIVISION FMC CORPORATION

633 Third Avenue, New York, Ν. Υ. 10017

C & Ε Ν 47

EQUIPMENT (Continued)

Product Company Ion collecting system E63 Royco Instruments

Menlo Park, Calif. Gas flow measuring unit

(MFG-96) Coating measuring instrument

(Permascope Type EC3)

E64

Ε 65

Technology, Inc. Dayton, Ohio

Twin City Testing Corp. Tonawanda, N.Y.

DTA-TGA unit Ε 66 Wm. Ainsworth & Sons (AWType-25) Denver, Colo.

Features Designed to aid research into the effects

of ions on plant and animal life Measures flow from 0 to 50 lb. per min.

For nondestructive measurement of films and coatings on nonferrous metals and alloys

Performs differential thermal analysis and thermogravimetric analysis at the same time or alternately

EQUIPMENT AND LABWARE . . . Portable fluidized bed Ε 67 ι Alpha Research & Development,

Inc. Blue Island, III.

ι Alpha Research & Development, Inc. Blue Island, III.

High-intensity light source E68 Applied Physics Corp. (Cary Model 1571300) Monrovia, Calif.

Chromatograph column coiler E69 Applied Science Laboratories, Inc. State College, Pa.

Indirect-fired heaters Ε 70 Brown Fintube Co. (102-R) Elyria, Ohio

Dust collectors E71 Fisher-Klosterman, Inc. Louisville, Ky.

Fume scrubbers Ε 72 Heil Process Equipment Corp. (Series 720) Cleveland, Ohio

Telescoping support device Ε 73 Manostat Corp. New York, N.Y.

Feed-through seals Ε 74 Materials Research Corp. Orangeburg, N.Y.

Polyvinyl chloride filters Ε 75 Millipore Filter Corp. Bedford, Mass.

Liquid-metal pump Ε76 MSA Research Corp. Callery, Pa.

Cathodic vacuum etcher Ε77 Numinco Monroeville, Pa.

Teflon-lined rubber tubing Ε78 Pennsylvania Fluorocarbon Co., Inc. Clifton Heights, Pa.

Countercurrent extraction apparatus Quickfit Reeve Angel Ε 79 Clifton, N J .

Air curtain incubator Ε 80 Sage Instruments, Inc. White Plains, N.Y.

Ultrasonic emulsifier Ε 81 Sonic Engineering Corp. (Model 4 Minisonic) Norwalk, Conn.

Density measuring device Ε82 Techne, Ltd. Princeton, N.J.

Temperature controller Ε 83 Techne, Ltd. (Model TC-1) Princeton, N.J.

Fermentation centrifuge Ε84 Teknika, Inc. Auburn, Mass.

Thermistor catheters Ε 85 Victory Engineering Corp. Springfield, N.J.

Trap-cooling refrigerator Ε 86 Welch Scientific Co. (Series 3150) Skokie, III.

Immersion temperature transducer Ε 87 Winsco Instruments & Controls (Model 2964-1) Co., Inc.

| Santa Monica, Calif.

For coating small parts with dry, pow­dered resin

Improves resolution of Cary Model 15 spectrophotometer

For coiling columns of stainless steel, copper, and aluminum

Uses finned firetubes to give five to 10 times more surface area than conven­tional heaters

Multiple-unit types that are more efficient than single units

With capacities from 1000 to 40,000 cu. ft. per min.

For supporting beakers, burets, and other common labware

For introducing high currents into vac­uums

Feature absolute particle retention at 6 microns

For pumping liquid-metals such as so­dium and potassium

For etching metallurgical specimens

Combines properties of Teflon with neo-prene

For separating pure materials from com­plex mixtures

Maintains temperature of biological specimens under microscopes

For laboratory or small-batch production

Column type for measuring density of materials that are in difficult to handle forms

For use with fluidized baths

Eliminates foam from aerobic and an­aerobic fermentation processes

For cardiac studies

For cooling cold traps

Features fast response time and accu­racy to within 0.1° F.

48 C&EN FEB. 14, 1966

NEW CHEMICALS

Surfactant for cosmetics and house­hold products is available from Al-colac Chemical Corp., Baltimore, Md. The chemical, sodium lauroyl mono-glyceride sulfonate, is sold under the trade name Siponate SGS. It pos­sesses what the company calls an un­usual combination of properties in­cluding low water solubility, high pur­ity, biodegradability, and low toxicity.

C30

Two-part epoxy casting resin and en­capsulant that can be used as a vac­uum seal on metal and metal-to-glass joints has been developed at Emerson & Cuming, Inc., Canton, Mass. The resin, Stycast 2850 FT, can be cured at room temperature. It has a thermal

coefficient of expansion approaching those of metals, low curing shrinkage, and low thermal conductivity the company notes. C 31

tert-Butyl peroxymaleic acid in puri­ties to 95% is available from the Lucidol Division of Wallace & Tier-nan, Inc., Buffalo, N.Y. The white crystalline chemical, trade-named Lu-perox PMA, is for use as a catalyst in polymerization of synthetic resins and preparing alkali metal salts. C 32

Further information on keyed Chemical and Equipment items is readily available . . .

I Use handy coupon on page 50

Readers' Information Service February 14, 1966

Use this handy self-mailer to obtain further information or literature. Simply mark the items desired, fill out the information requested, clip the coupon, fold, staple, and mail.

Name:

Company:

S t ree t :—

City- Zone- -Z ip-

Your Title:

YOUR FUNCTIONS (Maximum of 2, please.)

Α Π Management Β Π Process Research & Development C G Product Research & Development D D Basic Research Ε Π Plant Operations F D Engineering Design & Construction

G Π Analysis/Testing Η Π Marketing/Sales Ι Π Purchasing J Π Consulting Κ Π Teaching—Student

CLIP COUPON—Fold along this line—fasten (staple, tape, glue) MAIL

Your Industry:

A ( ) Engineering and Construction Β ( ) Food and Kindred Products C ( ) Textile Mill Products D ( ) Paper and Allied Products Ε ( ) Government F ( ) Chemicals and Allied Products G ( ) Elastomers, Polymers, Plasticizers H ( ) Drugs I ( ) Detergents, Cosmetics, Specialties J ( ) Paints, Varnishes, etc.

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) Petroleum Réf., Asphalts, Lubricants

) Rubber and Plastic Products ) Independent Laboratories ) Consultants ) Primary Metal Industries ) Fabricated Metal Products ) Machinery and Equipment ) Transportation Equipment ) Instruments and Controls ) Education

new M m ol suDernressure

eaotament

pressures to 100,000 psl temperatures to 1000 F

At your fingertips, over 100 pages of up­dated detailed information on Aminco's standard line of Superpressure Equipment.

Described is an expanded line of Pumps and Compressors now including hand-operated, motor-driven and air-operated units with pressures up to 100,000 psi. Another section fully describes everything needed to order Valves and Fittings. Also covered are Pressure Balances, Reaction Vessels, Custom-Built High-Pressure Equipment, and many accessories.

WRITE FOR YOUR FREE COPY OF CATAL06 466 CEN-1

Shown above is the 46-14060 Air-Oper-ated Single-End 30,000 psi Compressor, one of many compressors described in this new catalog.

ΝΓ AMERICAN INSTRUMENT CO., INC.

8030 Georgia Ave., Silver Spring, Maryland

FEB. 14, 1966 C&EN 49