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Jul 03, 1923 |
Condensation product of urea and formaldehyde obtained
K. Ripper obtains a condensation product of urea and
formaldehyde by the use of salts giving an alkaline
reaction on hydrolysis. These are added to retard
gelatinization of the initial condensation products soluble
in water.
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Aug 20, 1923 |
Artificial resins are used as adhesives
Artificial resins obtained by the polymeriztion of
aldehydes are used as adhesives or cements, either alone,
in solution, or mixed with other filling material.
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Oct 01, 1923 |
Process of nitriding for surface hardening described
A. Fry, Krupp, describes the process of nitriding for
surface hardening.
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Oct 30, 1923 |
New aluminum alloy (51S) described
R.S. Archer and Z. Jeffries, Alcoa, describe an aluminum
alloy (51S) with approximately 4.4% copper, 0.8% silicon
and 0.75% manganese, improvable as to strength and hardness
by heating to about 500 degrees C, quenching, and aging at
120-160 degrees C.
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Nov 01, 1923 |
Effect of local deformation strain on metal suggested
H.J. Gough and D. Hanson suggest that local deformation
strain hardens metal locally and initiates fracture when
some limiting value is reached.
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Mar 28, 1924 |
Alkali halides can be made to behave ductilely
A. Joffe et al. show that normally brittle alkali halides
can be made to behave in a ductile manner by immersion of
the crystals in warm water while they are being loaded.
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May 07, 1924 |
Patent for polymerized styrene
The Naugatuck Chemical Co. receives a patent for
polymerized styrene to produce three series of compounds.
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Jul 12, 1924 |
Ways of polymerizing styrene described
I. Ostromislensky describes ways of polymerizing styrene
and its homologs.
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Aug 01, 1924 |
"Micarta" propellers
F.W. Caldwell ad O. Clay describe the design, materials,
and method of construction of "Micarta" propellers.
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Oct 01, 1924 |
Preparation of carbides and nitrides from the vapor phase
A.E. Van Arkel describes a process whereby carbides and
nitrides can be prepared by deposition from the vapor phase.
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Feb 09, 1925 |
Cyclization of rubber developed
Cyclization of rubber, which later proves to be the basis
of a number of industrially important adhesives, is
developed by W.C. Geer.
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Apr 14, 1925 |
Nickel-copper alloys obtained
R.C. Stanley, International Nickel, obtains nickel-copper
alloys (of the Monel type) by roasting a nickel-copper
material, the product being subjected to a melting
temperature with a sulphur-removing slag in a basic-lined
electric furnace.
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Apr 21, 1925 |
Method to obtain 99.8% pure Al devised
William Hoopes, Alcoa, devises a method of obtaining
aluminum at least 99.8% pure by electrolytic refining.
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May 05, 1925 |
Plastic flow is determined by shear stress on glide planes
P. Rosband and E. Schmid demonstrate that plastic flow is
determined by the shear stress acting on glide planes.
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Aug 11, 1925 |
Cobalt added to toughen tungsten carbide
K. Schroter adds cobalt metal to tungsten carbide to form a
tougher material than the cast carbide.
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Oct 29, 1925 |
Preparation of some metals described
A.E. Van Arkel and J.H. de Boer describe the preparation of
pure titanium, zirconium, hafnium, and thorium metals.
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Nov 02, 1925 |
Polymer of vinyl chloride prepared
I. Ostromislensky prepares a polymer of vinyl chloride by
effecting the polymerization in two stages. In the first
stage a polymer is produced which is soluble in acetone and
in the second stage furthur polymerization is effected by
the action of light or heat or both.
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Nov 13, 1925 |
Creep resistance of Ni-chromium alloy studied
H.J. Tapsell and J. Bradley find the creep resistance of 80-
20 nickel-chromium alloy to be superior to other materials
available at this time.
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Dec 30, 1925 |
Patent on 3 coating airplane wing process
T.F. Tesse secures a patent on a process whereby the fabric
of airplane wings is provided with at least three
successive coatings - the intermediate coating being formed
from a cellulose acetate solution and possessing greater
flexibility and elasticity than the other two.
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1926 |
Time of minimum creep rate
R.W. Bailey states that, during time of minimum creep rate,
the strain hardening produced by creep is continuously
overcome by the annealing effect of high temperature.
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