Thursday,
DONALD DUCK
YOU BARGED RIGHT ́ THROUGH 'AHEAD OF
ME! DON'T YOU KNOW A GENTLEMAN
LETS A LADY GO FIRST ?
OKAY. OKAY!
Capt
127, Walt Dimey Frabadi
W! Rights Reserend
HONGKONG TELEGRAPH
LA DOOR, MADAME
PRECEDE
ME!
WELL,
THAT'S
MORE LIKE...
THUD
Court
March 6, 1941.
By Walt Disney
HAVE YOU TRIED OUR
AUSTRALIAN CHICKEN & HAM SAUSAGE
Now 800.
per lb.
(approx. 1 lb. each)
LANE, CRAWFORD, Ltd.
GRIN AND BEAR. IT
ENGLISH CPOKE
(-31
"HURISTS)
WELCHE
ESPANOL CURIO SHOPPE
By Lichty NEW SYNTHETIC
RUBBER IS MADE
FROM
fing 33% 15. All His Me
"Hereafter, I wish you'd let the Government take care of our Pan-American trade relations!"
Crossword Puzzle
ACROSS
1-Precious metal
B-Cit in Germany 10-Increase
14-Away from wind
15-ring into effect
18 Wander
17-Blap down nois
· 18- Agilates
10-Arabian esport
20-emoved skin
72-Ton (ur.)
23-Tura inside out
21-Tear
24-Entrance
20-Varnish ingredient
32-Cazzous_compound.
J-Wrath
31-Bouth American
elly (col)
18~Wing-like part
19-Almoit
-Colonial lender
$2—Japanese portesston
44-Carpet
49-Hock partieles
46-Amphibia
17-fold buck
45-inc
AB-Frequentis
61-Lubricate
B2-Personintention of
truth
63-Was chairman
B-Es predators
66-Insect etk
B-mall
03-Larin
07-mplement
68-Decorcua
7
**** By LANS MORRIS
PREVIOUS PUZZLE
ANSWER TO
71--Appear 73-Pokes bet 7-Paure in air-
24-Not wild
75-triglumi LYTE 26-ruting powder 73-Ireland'
DOWN
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Scully
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4. Frente
21
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32
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71-Goddess of hunt 23-Beloso
35-1
27-Larve antelope
28-Attempt
19-Combining form:
12k
30-Apart
37ftruenilly
31-Jeweler's right.
33-1.casty
16-Oriental counter
37-Attack
40-Wheel mark
11-Parent
43-' tilckhame
45-Crawing an
41-Perish
44--BOITI
81-Warthleas teminant
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7-One of
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Prefix hall
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12 And
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36 37
Count the "TELEGRAPHS"
everywhere
1
In full detail a new triumph of chemistry -production of a syn- thetic rubber directly and easily from petro- leum was described before the American Chemical Society by chemists of the Stan- dard Oil Development Company recently.
The discovery of butyl rubber has been a closely guarded secret. Now Dr Per K. Frolich, director of the chemical division of the Esso Labora- tories, declares "butyl rubber can be manu- factured in any re- quired quantities as rapidly as the neces- sary plant facilities can be installed."
Six Kinds His was the first technical report of the new product, believed capable of sharing in the work to make
America independent of natural rubber. For ten years the research has gone on. There are now half a dozen types of synthetic rubber all superior in specialised ways to nature's rubber- Thiokol, the product of Dow Chemical Company's labora- tories; Neopreme by du Pont; Firestone's developments with Buna; Goodrich's Ameripol and Koro- seal; Goodyear's Chemigum; and now Standard Oil's butyl rubber.
Dr Frolich said for two years tests had been conducted to evaluate butyl rubber for specialised de- fence purposes. These tests will continue.
At present butyl rubber is produced from petro- Icum in a semi-commercial pilot plant using far more direct and simple pro- cesses than those required for production of other
7
New Shipment of Children's Wear
Bairn's Wear and
PETROLEUM ‘Glenroyal'
kinds of synthetic rubber sation, is also the greatest said Dr Frolich,
It was because petro- leum and rubber are built up of the same two chemical elements, carbon and hydrogen, that the Standard Oil Development Company became interest- ed in synthetic rubber possibilities.
shortcoming of rubber, for
the reason that there is too much of it.
"Rubber is so highly un- saturated that it remains un- stable and chemically reactive even after it has been, com- bined with the small amount of sulphur normally required in the vulcanisation process. If we try to use enough sut- phur to overcome this, we obtain hard rubber or ebonite obviously not the answer for producing clastic and pli- able rubber goods."
"It would seem," Dr Frolich pointed out, "that the petroleum industry with its abundant supply of low cost hydrocarbons Important Material is in the best possible posi- tion to supply our needs of synthetic rubber.
"Because of the do- minating importance of the automobile tyre field as an outlet, tests were first undertaken on а small scale to answer the question of whether or not butyl rubber had any possibilities in this direc- tion.
"Then when the future
supply of natural rubber
became a matter of na- tional concern, Standard Oil was requested by the Army and Navy Munitions Board to co-operate with one or more rubber com-
panies-to-the-end that the suitability of butyl rubber for tyres could be deter- mined at the earliest pos- sible moment. Such a pro- gramme is still in pro- gress."
.
Characteristics
Distinctive characteris- tics of the new synthetic include greater ability to stretch than natural rub- ber; remarkable stability and durability; freedom from impurity; taste and odour; lack of colour; good age, tear and abra- sion resistance; amazing resistance to mineral acids and unusual electrical pro- perties.
Dr Frolich showed by. means of motion picture film the difference between natural rubber and syn- thetic rubber. Nature's rubber is made up of ex- tremely long, chainlike
molecules in which the atoms are so arranged that a product is obtained with a high degree of elasticity, Rubber, how- ever, does not have much mechanical strength until it has been vulcanised.
"The reason why rubber has become one of our most valuable structural materials can be at- tributed to two of its molecular characteristics -elasticity and unsatura tion," Dr Frolich explain- chemical unsaturation, ed. "However, this very which is so essential from the standpoint of vulcani-
Just as a spare tyre loses more and more. of its poten- tial road mileage as it growa older, so all of our many rub- ber household articles, includ- ing rubber-insulated electric. wiring, gradually deteriorate until they have to be replaced. Butyl rubber is characterised by a remarkable stability and durability which for many purposes make it superior to natural rubber and to other synthetics. By varying the composition of the raw ma- terials employed it is possible to obtain products that differ considerably in their detailed properties.
"Originally the goal of chemistry was to synthesise a product that would equal na- tural rubber in those proper- ties which have contributed to make it one of the most im- portant structural materials," Dr-Frolich said.
The more recent trend, how- ever, is to synthesise materials closely resembling Nature's product in Home respects, while at the same time sur- passing it in others.
Since, like natural rubber, it is a hydrocarbon, butyl rub- ber definitely does not belong to the class of synthetics that are resistant to softening in petroleum solvents. Paradoxi- cally, however, it is more re- sistant to such simple aroma- ties as benzol and toluol than even the synthetic rubbers now employed in gasoline- dispensing bose. It is more resistant than natural rubber to many oxygenated com- pounds and to certain other Bolvents such as ethylene dichloride.
Easily Moulded
The new rubber is readily moulded even into articles of intricate design, and its good tear resistance is an aid in removing such products from the hot mould.. Its wear re- sistance may be made compar- able to natural rubber, and it is also more resistant to con- tinued flexing both hot and cold. Indeed it will flex with- out cracking at a much lower temperature than any other rubber, natural or synthetic.
Hot concentrated nitric acid, for example, has no visible effect on the new rubber dur- ing a time interval which is sufficient to make a similar sample of natural rubber dis- appear completely.
Concerning the methods of manufacture, Dr Frolich had little to say, and concerning futuro manufacturing plans he replied that these will be somewhat dependent upon tests still in progress. National
defence considerations are at the bottom of this and they will govern to some extent all' evaltiation of the new rubber for commercial uses.
BOY'S BUSTER, SUITS
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In pastel shades, from $6.95
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