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assesses Get. s, 1946
‘
'
is
,.
12,409,056
."
TATES PATENT. QFFICE
SOAP COMPOSITION
Herbert KennetEMcClain, Wyoming, ‘Ohio, as
signor to The Procter and Gamble Company,
Ivorydale; Ohio, a corporation oi’ Ohio
No Drawing. Application'August 22, 1944,
Serial No. 550,671
8 Claims. (Cl. 252-368)
v
1
w
This invention relates to the stabilization of '
soap or soap products, and more particularly'to
soap.
the prevention or retardation of the development
It is an object of the present invention‘ to im
prove ‘the quality of soap prgducts’ especially
’
'
According to my invention polyethylene poly
of1 rancldity and customary accompanying dis‘3° “mm
2
those products containing a proportion of rosin
amines of the formula
6
'
HzN-CzI-k- (HN-CaI-Ia) rum
wherein a: is a whole number of 1 or more e?ec-_
with respect to their keeping quality as evidenced
tively prevent or retard to a desired degree the
by their tendency to become rancid or discolor.
development of rancidity in Soap Products and
It is known that many soap products wi11 d1s_ 10 especially those which contain a proportion of
color and develop a rancid‘ odor on aging and
rosin soap and which are readily susceptible to
that this property is especially characteristic of
the development of rancidity. Of the polyeth
soap products prepared from fats which them_
ylene polyamines referred to, those in which the
selves are susceptible to the development of ram
Value 0f 11 is from 1 t0 5 are Particularly Well
cidity. These undesirable changes in the soap is suited for use in the practice of the invention.
product are in part due to conditions of storage
0! outstanding value as preservatives are dieth
and handling, but in the main the development
of rancidity is more pronounced in products
which have become contaminated during process-
ylene triamine, triethylene tetrhmine and tetra
ethylene pentamine, that is, those polyamlnes
having $ Values of 1', 2 and 3 respectlvely- Com
ing with a small amount of an agent, such as 20 mercial mixtures of these various amines may
copper for example, which will promote rancidity.
‘ 11130116 employed with good e?ect.
I
Many preservatives have been suggested for
In the range of ordinary Conditions, I ?nd that
use in the prevention or retardation of the de-
> an amount of the polyethylene polyamine Which
velopment of rancidity in such soaps, and their
will give good results will be from about 0.02 per
e?ectiveness has been well established. _
25 cent to about 0.1 per cent of the weight of the
Recently, because of fat shortages, it has be- _ ' BOBJJ- Amounts above and below this range,
come necessary to suplement normal fat requlrehowever, Such 95 0-005 per cent to 1 Per cent of
ments for soap manufacture with rosin and the
the Weight of the 582p will show greservative
use of this material has intr
action also and may
uced problems in
rancidlty which have not hgrietofore been en- 30
countered.
For example, it has been noted that
soap products in particle form such as ?akes,
spray dried granules, etc., having a. relatively
large surface area per unit weight and a rel'a-
_
employed if esil'ed
In producing the stable soap Products of the
plil'esent
inhvlention
theenpgrestervative
isd added?to8
e SOB-P
any 00m!
811 manner uring
iuguzg
crutchingt'or othielrlniixing
operatioriawheret-1
.t e preserva ive w
uniformly dis ribute
,
tlvely low moisture content and prepared from 35 thl‘?ughvut. the: entire soap mass. Distribution .
fat mixtures containing rosin, develop undesired
maybe esslsted by dissolving the mine in ?-e?r- ,
rancidity and accompanying discoloration much
tier, but _I havefound that this is unnecessary
faster than do similar products prepared from
and that effective distribution may be brought
comparable rat formulas containing no rosin.
“PM in the same manner that 1.5 used m ‘115'
The amount of rosin does not appear critical. 40 "13311? perfume orAggleleruilngreldlegtsltmuglh'
Small amounts such as 1 per cent to 2 per cent
231mee?gg‘pbgg’lss'thorouémye g’rgfxgy $260,313;
will enhance the development of rancidity in
Soap, the
i mm is converted into the desired
the soap products prepared from such mixtures,
product form
and larger amounts W111 have eveln greater ef“ 45 The effective preservative action of the polyeth
i’ect. I have discovered further that such soap
ylene polyammes is noted in soap products of
Products containing rosin Soap are not Smt'_a'b1y . all kinds, but, as previously pointed out, their
preserved against the development 0f ralmldity
outstanding value lies in their use in granular
by agents which have been e?ectively used heretype soap products containing a proportion of
tofore in ordinary soap products. As a. matter 50 rosin soap.
of fact, I have obtained evidence indicating that
The following examples wil1 illustrate the man.
some of the preservatives which are e?‘ective in
ner in which my invention may be practiced, but
retarding the development of rancidity in ordiit is to be understood that the invention is not to
nary soap granules and ?akes, for example, acbe limited to the speci?c conditions recited
tually promote the development of rancidity in 55 therein.
'
2,409,056
3
4
of which a minor proportion is rosin soap and;
as a rancidity and discoloration inhibitor, a poly
ethylene polyamine of the formula
Example 1.--A mixture consisting of 86.7% of
i combination of tallow and grease having a titer
n the neighborhood of 40 and 13.3% rosin was
:onverted into kettle soap in the usual way by
I
HzN-CzHr (HN-CzHO run,
reatment with caustic soda solution. After the
isual boiling and washing operations, the kettle
cap was crutched, during which 0.05% by weight
a: being a whole number, the said product beinc
in small particle form and having a relatively
If triethylene tetramine was uniformly distrib
lted throughout the soap mass. A spray dried
large surface area per unit weight and a rela
tively low moisture content substantially corre
sponding to that of ?ake and spray dried granular
ioap product was prepared from this mixture in
;he usual manner, for example as disclosed in
J’nited States Patent No. 1,652,900.
In an ac
soap products.
:elerated rancidity development test involving
of which a minor proportion is rosin soap and,
as a rancidity and'discoloration inhibitor, from
about 0.005 per cent to about 1 per cent by weight
of a polyethylene polyamine of the formula
3. A soap product comprising essentially soap
exposure of the spray dried product for three
lays at 120° F. to the atmosphere, the product
leveloped a peroxide value of 2.5. A spray dried
)roduct corresponding in every way with the sam
ale prepared above except that the triethylene
ietramine was omitted developed a peroxide value
wherein :c is a whole number from 1 to 5, the
>! 58 under the same test. These peroxide -val 20 said product being in small particle form and
ies, translated into results of shelf storage tests
having a relatively large surface area per unit
inder normal conditions, indicate that the prod~
weight and a relatively low moisture content sub
ict without preservative will go rancid in one
stantially corresponding to that of ?ake and spray
nonth whereas the product containing the-pre
dried granular soap products.
4. A soap product comprising essentially soap
servative will stay fresh for many months.
Example‘ 2.-A mixture of 95% of a combina
of which a minor proportion is rosin soap and,
as a rancidity and discoloration inhibitor, from
tion of tallow and grease having a titer~in ‘the
neighborhood of 40 and 5% rosin was saponifled
about 0.005 per cent to about 1 per cent by weight
in the kettle 'with caustic soda solution, then
of diethylene triamine, the said product being in
coiled and washed in the customary manner. In
small particle form and having a relatively large
ahe crutching operation 0.10% by weight of tri
surface area per unit weight and a relatively low
ethylene tetramine was uniformly distributed
moisture content substantially corresponding to
throughout the soap mass. Thereafterthe soap
that of ?ake and spray dried granular soap prod
was converted into thin ?ake form, for exam
ucts. _
ple by the ?ake forming process disclosed in
United‘ States Patent No. 2,295,596. In the ac
5. A soap product comprising essentially soap
:elerated rancidity development test described in
of which a minor proportion is rosin soap and,
as a rancidity and discoloration inhibitor, from
Example 1 the soap ?akes developed a peroxide
value of 0.4 and remained fresh for many months
Y . about 0.005 per cent to about 1 per cent by weight
in a shelf storage test whereas a product corre
40 in small particle form and having a relatively
of triethylene tetrarnine, the said product being
sponding in every way except_that it contained
no triethylene tetramine preservative developed
large surface area per unit weight and a rela
tively low moisture content substantially corre- -
a peroxide value of 9.0 in the accelerated test r , sponding to that of ?ake and spray dried granu
and became rancid in about one month in the
lar soap products.
shelf storagetest.
_
-
45
6. A soap product comprising essentially soap
Soap products prepared from fat formulas other
than that shown in the example will also be
'of which a minor proportion is rosin soap and,
as a rancidity and discoloration inhibitor, from
improved by the addition of the polyethylene
polyamine preservatives of my invention. Thus
' about 0.005 per cent to about 1 per cent by weight
greases, coconut oil, cottonseed foots fatty acid.
‘ responding to that of ?ake and spray dried gran
of tetraethylene pentamine, the said product
the invention may be employed to advantage in '50 being in small particle form and having a.re1a
the production of soap products from rosin-con-v
tively large surface area per unit weight and a
taining formulas including various tallows and _ relatively low moisture content substantially cor
f ular soap products.
,
etc.
I have also found in the course of my work
7. A soap product in ?ake form comprising
on the invention that the mineral acid salts. for
essentially soap of which a ‘minor proportion is
example, the sulfates oi the polyethylene poly~ 1' rosin soap and, as a rancidity and discoloration
aminesabove referred to likewise have preserva
inhibitor, from about 0.02 per cent to about 0.1
tive action comparable with that of the amines
‘ per cent by weight or a polyethylene polyarnine
themselves when incorporated with the soap, and 60 oi the formula
the invention is to be understood as including
.55
their use. The chlorides, phosphates, etc., of the
amines may also be incorporated if desired.
>
"wherein a: is a whole number from 1 to 3.
Having thus described my invention, what I' 1
8. A soap product in spray dried form com
claim and desire to secure by Letters Patent is: 05
l. The process of inhibiting the development
of rancidity and discoloration in a granular soap '
product prepared from a fat formula containing ’
a, minor proportion of rosin, which comprises in
corporating with the soap a polyethylene poly-- 70
amine of the formula
H2N'C2H4' (HN'CsHO :“NH:
wherein a: is a whole number from 1 to 3.
2. A soap product comprising essentially soap
prising essentially soap of which a minor propor
tion is rosin soap and, as a rancidity and discol-*
oration inhibitor, from. about 0.02 per cent to
about 0.1 per cent'of a commercial mixture of
polyethylene polyamine consisting essentially of
amines of the formula
HaN-CaHr (HN-CzHOrN'H:
wherein a: is. a whole number from 1 to 3.
HERBERT KENNETH McCLAIN.
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