P R O B L E M . . .

. . . to find α surface coating which cr .. would provide superior protection for IC

industrial refrigeration and air condi­tioning equipment against moisture and the variety of chemicals encountered / in the operat ion of this equipment.

S O L U T I O N

* ' *±

Ο

. . . a baking-type finish based on "Parlon"—Hercules chlorinated rub­ber . In one of the severest corrosion tests known—exposure in 2 0 % salt fog a t 9 5 ° F.—the best finishes obta inable

lasted only one week. The "Parlon" finish J a ^ e d one year—3 to 4

t i A £ l H M e r than the best hot* d i p j ^ ^ ^ ^ ^ a l £ ^ p a t i n g in

SYNTHETIC RESINS · CELLULOSE PRODUCTS · TERPENE CHEMICALS

920 C H E M I C A L A N D E N G I N E E R I N G N E W S

WHICH IS THE BEST CORROSION CHASER? For one large manufacturer of refrigeration equipment, it proved to be a finish based on "Parlon"—a product of Hercules research in chlorinated chemicals. By far the most durable of all finishes tested, it has solved the corrosion problems on all this company's products.

"Parlon* ' is used to impart chemical and moisture resist­ance to many types of coatings, both air-drying and heat-reactive. For example, industrial maintenance coatings, marine finishes, highway markings, concrete floor paints. It also makes fast-drying and alkali-resistant inks for soap wrappers, adhesives for bonding dissimilar materials, waterproof paper lacquers, textile imprégnants.

We would like to tell you more about ''Parlon'* and the many other Hercules chemical materials that are serving industry, and to work with you toward a solution to your product processing or finishing problems.

HERCULES POWDER COMPANY 982 Market Street, Wilmington 99, Del. Sales offices in principal cities

R E S U L T . · ·

. . . equipment of ordinary sheet steel

now withstands f a r longer the corro­

sive action of water, sodium chloride,

calcium chloride, and other chemicals

used in cooling—even the hydrochloric

acid used periodically to remove lime

encrustations caused by hard water !

•PARLON," "METALYN," AND "POLY-PALE" ARE HERCULES TRADE-MARKS

Large-Scale Samples

The latest addition to Hercules extensive

research facilities is the new large-scale

samples laboratory at the Experiment

Station in Wilmington, Delaware.

This new laboratory bridges the g a p

between laboratory development and

pilot plant stages. Hercules can process

sampres of chemicals in development, for

field trials on a much larger scale than is

possible in a laboratory a n d still not have

to go to pilot plant production. Already,

samples ranging from 10 to 10,000 pounds

have been processed in this new labora­

tory.

The large-scale samples laboratory is

flexible enough t o accommodate a wide

variety of organic chemical processes

with a minimum of f ixed equipment

changes. Operations can be conducted

at temperatures from minus 5 0 ° to plus

350°C . Most of the equipment is set up

in duplicate with nickel for high pH con­

ditions, and nonmetallicequipment(glass-

lined steel. Pyrex, porcelain) for the low

pH ranges.

Floor Covering Binder

Poly-Pale® resins are being used t o a large extent as a resin binder for cer­tain types of floor coverings, particu­larly linoleum, and for floor tiles.

Better "Handling" Plastic Kitchen tool handles molded with high·

acetyl cellulose acetate show good color

and form retention even after prolonged

and repeated immersions in boiling wa­

ter. This performance cannot be matched

by any other low-cost thermoplastic now

available.

Low-Cost Tall Oil Ester

The introduction of " M e t a l y n " makes

commercially available for the first time

a low viscosity, light colored, highly re­

fined, neutral ester of ta l l oil. This low

cost material has a high viscosity index,

high degree of ^maturation and a very

low acid number. The unusual combina­

tion of advantages possessed by " M e t ­

alyn*' make it particularly suitable as a

base for lubricating oil additives a n d as

a secondary plasticizer for vinyl resins

in applications where aging character­

istics are not critical.

ROSIN AND ROSIN DERIVATIVES · CHLORINATED PRODUCTS

V O L U M E 2 8, N O . 12 » » M A R C H 2 0, 1 9 5 0

AND OTHER CHEMICAL MATERIALS FOR INDUSTRY

GC50-2

921