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Патент USA US2122543

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Patented .Iuly 5,‘
2,122,543
UNI-Tao- STATES PATENT ‘OFFICE
CONTAINER cosmos
William vJ. Tomsioek, St. Paul, Minn, Lloyd L.
Dodge, Rhinelander, Wis., and Jose ‘B. Calva,
St. Paul, Minn” assignors, by direct and mesne
assignments, to Dodge Chemical and Manufac
turing Company, Chicago, Ill., a corporation of
Delaware
No Drawing. Application August 15, 1934,
'
‘
Serial No. 739,925
>
..
(c1. air-es)
3 Claims.
Our invention relates to‘ an improvement in
By resins, we mean natural substances such as
v container coatings, and is particularly designed
gum thus, copal, dammar, kauri, mastic and
to preserve metallic and wooden containers and
other similar substances; and synthetic sub-"
' to avoid the contamination of stored liquids by
stances such as ester gum, chlorinated-aromatic ,
the inner surface of the container.
_
, It, is‘ common practice to employ pitch as ‘a
hydrocarbons such as chlorinated biphenyl, poly
coating for kegs and vessels used for the storage
of liquids, particularly in the brewing industry.
modified by fatty-acids and mixed with rosin
‘ties .to .injure the liquid stored in‘ the container.'
ents 254,111; 269,659; 281,939; 289,968, and
merized turpenes, ' phenol-‘formaldehyde resins
and rosin derivatives such as ester gum, the
This pitch may comprise anything from rosinv to . glyceride of abietic acid such as the Amberols,
10 asphalt. This pitch coating is undesirable for a the Albertols, Bakesite, Paranol, which are trade
10
plurality of reasons.‘ It often contains impuri-'
names of substances described in German Pat
Pitch often chips or cracks oil’, exposing the con- ' 438,371, and resinous and waxy metallic sub
tainer surface. Furthermore, the high tempera ' stances such as the metallic derivatives of organic
15 tures necessary'in the application of this pitch acids such as abietic, stearic and the like. ‘
16
. often injurethe chemical structure of the coat
By waxes, we mean natural waxes such ‘as
mg.
wax, beeswax, ceresin,.and synthetic waxes _
Our coating has the advantages of better ad 'Japan
such as Rilan wax, and waxy substances such as
he'sion to the container, thus greatly diminishing
the chances of having the coating separate from
the container surface, exposing this container
stearyl alcohol, stearic acid and similar sub
stances; These waxes are soft with relation to 20.
carnauba wax and provide a pliable coating.
surface to the liquid stored._ ‘Our coating is‘ de
signed to adhere more ?rmly than‘ the usual pitch
coating to both wood and metal surfaces.
By hydrocarbons, we mean substances such as
petrolatum, and the like.
The'general formula and the usual limits of the
Our
coating
has
higher
moisture-proofing
qual
25
ingredients
used therein have been stated. A 25
ities than the’usual pitch-coating,v thus_ obviating . speci?c example
of a formula containing the neo
the danger. of ‘having the stored liquid work '
ingredients in the desired amounts would
through the coating into contact with the surface essary
be as follows:
of the container. Moreover, our coating is pro
30
Container coating:
Ester-gum
vided greater plasticity, thus virtually obviating
any chipping or cracking of the coating. As a
result, once a container is coated it is virtually
.
,
' It is also va feature of our coating that lower
temperatures are required to melt the coating,
thereby-avoiding excessive heating of the compo—
sition, which is apt to produce a chemical crack
ing and give rise to water soluble products which
will contaminate aqueous solutions such as beer.
It is an added feature of our invention that
no solvent is required to evaporate; Our coating
is applied by means of a standard keg coating
equipment, or by spraying or painting.
The coat-
ing is thus particularly adapted for use in'coating
Japan wax and petrolatum are natural prod- '
purpose.
The
coating of our invention consists in mix
‘
tures of resinous substances. waxy substances,
and suitable hydrocarbons to obtain the desired
,
,-
I
r
;
,
for coating containers, and while we have en-‘
deavored to set‘ forth the best embodiment
thereof; we desire'to have it understood that the
formula may be changed within the scope of the
following claims without departing from the spirit
‘
I
'
'
Per cent
Resins _..Waxes
41 to 99
'
_
I
Hydrocarbons -ss ........ ..--.' ..... -.'-..
'
lto 59
1 to 59
'
In accordance with the patent statutes, we
_ have described the principles of our composition
In- general, our formula is as follows:
>
11
24
ucts, and need no de?nition. Ester gum is the
35
glyceryl ester of abietic acid.
The speci?c formula given is merely an exam
ple ofone formula which could be used, and is
not given as the only mixture which would make
a proper coating, as is believed clear from the
general formula and the citation of numerous
resins, waxes and hydrocarbons which are illus
. trative of materials ‘which could be used for the
wooden’ or steel kegs used in the brewing industry. I
results.
65 30
Japan wax _________________________ .._
. Petrolatum
1 impossible for stored liquid to contact the surface
of the container.
Per cent
of the invention.
'
'
We
claim:
'
,
'
-
.
. 1. In combination with a base, a coating com
-
amaua ‘
priaingvsubstantialiy ester g’um 55%,‘ Japan wax
11%, and petrolatum 24%.
'
2. In combination a base and a. coating there
tor, comprising substantially ester
_ cereain 11%, and petrolatum 24%.
wmnu J. ToMsmEK.
for, said coating comprising substantially eater
5
gum 65%, wax 11%, and pet11oiatum_24%.
8. In combination with a base a coating there
65%.
' -
.
LLOYD L. DODGE.
JOSE B. can.
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