Note: Descriptions are shown in the official language in which they were submitted.
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1
C3738
SYNERGISTIC PERSONAL HYGIENE PROCESS COMPRISING THE STEPS OF
COMBINING A COSMETIC CLEANSING COMPOSITION WITH AN
APPLICATION VEHICLE
The present invention relates to a synergistic personal hygiene process which
provides
for a process comprising combining a novel liquid composition, preferably a
cosmetic
cleansing composition, with an application vehicle to produce a personal
hygiene
product. The cosmetic cleansing composition thickens upon dilution whereby the
performance of the personal hygiene product is increased. The invention
further relates
to such cosmetic cleansing compositions.
The viscosity of the novel liquid composition is increased in a water
environment and
this is especially beneficial when used in combination with an application
vehicle.
It is believed that this increase in viscosity, during use is responsible for
the improved
performance of the product.
Over recent years the hygiene and personal cleanliness product market has
shifted away
from bar soaps towards a more modern and sophisticated approach, namely,
liquid soap
products. This tendency, originally observed in the European, American and
Japanese
markets, is being followed in other countries and on other continents.
The present liquid soap products have associated drawbacks, such as cost,
yield to the
consumer upon use, or even consumer recognition in comparison with bar soaps.
What
is meant by yield to the consumer upon use is the amount of product
functionally
available and not that which is removed before the consumer has been able to
make use
of the product.
One of the drawbacks of the conventional liquid soaps is the high waste factor
caused
by the liquid soap product slipping between the fngers, or, being partially
washed or
rinsed away when used with sponges before the consumer has had time to use it
. This
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is believed to be due to the low viscosity of the product. In this way, a
significant part
of the product is thrown away before it can exercise its function. This "loss"
means that
greater quantities of the product are required with a consequent impact on the
cost/benefit as perceived by the consumer. It also results in greater
detrimental
influence upon the environment caused by unnecessary effluence and an
exaggerated
consumption of raw materials.
EP 254 653 (Cotelle S.A. and Henkel) refers to thickening concentrates upon
dilution
and discloses compositions which are thickened with excess NaCI.
WO 93/03129 (Unilever) discloses a concentrated liquid for light duty washing
which
contains a mixture of anionic and nonionic surfactant agents; a solvent, and
an
alkanodiol with 3 to 6 carbon atoms as a hydrotrope.
WO 93/08247 (Chlorox) discloses AES based systems thickened by adding a
suitable
amount of electrolyte.
EP 574 086 (Colgate) discloses how the proportion of salt in a composition
affects
viscosity.
WO 95/02664 (Jeyes Group) discloses a liquid concentrate which, when diluted
in
water, produces a thickened product. The concentrate contains (a) an ether
alkyl-
sulphate, (b) optional components such as anionic, nonionic or amphoteric
surfactants,
(c) an optional cationic surfactant either alone or in combination with a
nonionic
surfactant agent; and, (d) an electrolyte or hydrotrope.
Patent application PI 9503351-3 (Unilever N.V.) discloses a method for
handwashing
dishes exclusively for use as a domestic sanitation agent, including the phase
of treating
an absorption vehicle with a surfactant agent which thickens when water is
added.
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Patent application PI 9501520-6 (Unilever N.V.) discloses a detergent
compound, based
on sodium-ether-lauryl sulphate, lauryl sulphate, amphoteric surfactant,
electrolytes and
hydrotropes.
WO 95/00116 (The Procter & Gamble Co:) discloses a personal hygiene system
which
uses a specific polymer sponge together with a liquid personal hygiene
composition
composed of skin conditioners, hydration creams and surfactant agents. This
invention
is aimed exclusively at the function known as "2 in 1" (combined cleansing and
hydrating) in conjunction with a special sponge in personal bathing.
A possible solution to the situation described above may be to produce
compositions
with greater viscosity but this would make the product harder to remove from
the soap
dispensers as viscosity tends to keep the product inside the dispensers.
Production of
high viscosity compositions would also typically require installation of
suitable
industrial facilities, since conventional liquid product lines do not have
agitation and/or
bottling systems which are suitable for high viscosity products.
The state of the art does not disclose the existence of any personal hygiene
systems,
associated with application vehicles such as sponges which unite the above
properties to
maximise the yield of usable products through the use of the synergistic
process of the
present invention.
The present invention is accordingly directed towards overcoming the problems
outlined above.
According to a first aspect the present invention provides a synergistic
personal hygiene
process comprising the steps of combining a cosmetic cleansing composition
which
increases viscosity during use and in presence of water with an application
vehicle such
that the composition tends to stay in the vehicle, wherein said cosmetic
cleansing
composition comprises:
(i) from 7% to 35% by weight, based on the total weight of the composition,
of one or more anionic, amphoteric or nonionic surfactants sensitive to
thickening by
electrolyte, or mixtures thereof,
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(ii) from 4% to 25% by weight of electrolyte,
(iii) 0.001% to 25% by weight of a skin benefit active ingredient selected
from
the group consisting of glycerin, sorbitol, vitamins, alpha-hydroxy acids, LTV
filters,
silicones, amino acids, hydrolysed animal proteins, cationic surfactants,
essential oils,
animal, vegetable or mineral oils, steroids, quaternium compounds, quaternized
polymers
and bactericides wherein said skin benefit active is retained for greater time
inside said
application vehicle and said skin benefit agent is released gradually from
said application
vehicle as said cosmetic composition increases in viscosity during use; and
(iv) water,
wherein said application vehicle is selected from the group consisting of
natural or
synthetic sponges, towels, woven cloth, non-woven cloth and mixtures thereof.
According to a second aspect the present invention provides a cosmetic
cleansing
composition as described in the first aspect.
The novel liquid compositions have the feature of increasing viscosity during
use, when
applied synergetically with a special application vehicle and in the presence
of water.
This increases the composition's tendency to remain in the vehicle, thus
increasing the
yield available for the consumer to use and providing an increased
cost/benefit ratio. It
also avoids unnecessary impact on the environment and additional capital
investment on
the production line.
Furthermore, it has been found that in certain ranges of electrolyte
concentration
excellent viscosity results may be obtained consequently giving a greater
yield of
product during use to the consumer.
The benefits of this technology may be explored to an even greater extent when
used
with compositions which, as well as components necessary for hygiene and
cleanliness,
contain active additives responsible for hydration, nutrition, softening,
protection and
revitalisation. As the compositions of the present invention increase in
viscosity during
use the active ingredients are retained for a greater time in the application
vehicle and
are released gradually so that they may fully perform their function without a
significant amount of waste.
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Typically, the personal hygiene composition of the present invention contains
surfactants, electrolytes, active ingredients and water. Optionally,
conserving
(preserving) agents, thickening agent, hydrotropes and promotional components
may be
added.
A range of raw materials for the categories mentioned above are available to,
and
known to, those skilled in the art who will chose among such raw materials in
view of
the objectives, aims and physical and chemical properties required of the
product. For
example cost,~yield, targeted skin type (oily, dry, sensitive or mixed); ease
of
application, rinsing ease, detergency, foam generation, smoothness
requirements,
stability and conservation (preservation) additional cosmetic benefits (e.g.
hydration,
nutrition, protection, etc.) amongst others would be considered by the skilled
man when
formulating the personal hygiene composition.
The compositions of the invention should contain at least one surfactant
sensitive to
electrolyte thickening.
Anionic, amphoteric, nonionic surfactant or mixtures thereof may be used
according to
the present invention. The anionic surfactants which are suitable for use
according to
the present invention include alkyl sulphates, ether alkyl-sulphates, alpha
olefin
sulphonate, sulphosuccinates, soaps, N-acyl sarconsinates, N-acyl glutamates,
N-acyl
polypeptide condensates, acyl isethionates, N-acyl methyl taurates, alkyl
benzene
sulphonates, alcohol sulphates and phosphate esters amongst others.
Preferred examples of anionic surfactants are sodium lauryl sulphate,
triethanolamine
lauryl sulphate, ammonium lauryl sulphate, ammonium ether lauryl sulphate,
sodium
ether lauryl sulphate, soap, sodium xylene sulphate, sodium sulphosuccinate,
sodium
olefin, C14-Ci6 sulphonate, MEA disodium cocoamido sulphosuccinate, sodium
benzene
sulphonate, sodium cocyl isethionate amongst others.
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The anionic surfactant preferably includes an ether alkyl sulphate of general
formula
(I);
R_O_(CH2-CH20)n S03_ (I)
wherein
N is 1 to 5 and R is Cg-1R. R is preferably CI2.
The amphoteric surfactants which may be used according to the present
invention
include alkyl glycinates and propionates, carboxy glycinates, alkyl betaines,
alkyl
imidazolines sulpho betaines, alkyl polyamino carboxylates, alkyl-amino/imino-
propionates and poly ampho carboxy-glycinates, amongst others. Preferred
examples
of amphoteric surfactants are coco-amido-propyl-betaine, sodium-corn-
amphocarboxy-
glycinate, corn-amido, sulpho betaine, coco-ethoxylated MEA, and alkyl-
dimethyl-
betaine amongst others.
The preferred amphoteric surfactants are alkyl-amido-propyl-betaines of
general
formula (II);
R-CO-NH-(CH2)3-N+(CH3)2-CH2C00 - (II)
wherein R has the same meaning as in formula (I).
It is especially preferred that the alkyl-amido propyl-betaine is coco-amido-
pi-opyl-
betaine wherein R is a chain of coco fatty acid with 12 carbon atoms.
The nonionic surfactants which may be used according to the present invention
include
the polyalkoxylated fatty alcohols and acids and their esters, alkanolamides,
polyalkoxylated and ethoxylated alkanolamides, glycosides and alkyl-
polyglycosides,
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and long chain ethoxylated amines, alkyl-amines, amine oxides, polysorbate,
nonoxinols, and polyoximers amongst others.
Preferred examples of nonionic surfactants include polysorbate 20, nonoxinol-
12,
polyethylene-24-lauric acid, coco MEA, and cetyl isooctanoate, amongst others.
The nonionic surfactants are, preferably, the amino oxides of general formula
(III);
R' RZR3-NO
wherein
Rl is a Cg_ZO alkyl group and R2 and R3 are C1_4 chain alkyls.
The typical concentration of surfactant in the compositions of the present
invention lies
between 7%, 35% by weight based upon the total weight of the composition,
preferably
between 8% and 20% by weight, most preferably between 10% and 15% by weight.
Among the electrolytes (organic and inorganic) which may be used in accordance
with
the invention are halides of alkaline metals, alkaline earth metals, ammonium
and other
metals, such as aluminium and zinc; sulphates and phosphates of alkaline
metals,
alkaline earth metals, ammonium and other metals such as aluminium and zinc;
MEA
and DEA salts, and alkaline metal silicates, amongst others.
Preferred examples of electrolytes used according to the present invention
are; sodium
chloride, potassium chloride, sodium sulphate, potassium sulphate, magnesium
chloride, magnesium sulphate, ammonium chloride and MEA chloride amongst
others.
The preferred concentration for electrolytes in this invention lies between 2%
and 25%
by weight, preferably between 5% and 15% by weight based on the total weight
of the
composition.
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Active additives may also be included to provide complimentary benefits to
skin
cleansing, such as hydration, nutrition, softness, protection and
revitalisation amongst
others. There is a vast range of suitable raw materials available, which may
be included
and which are known to the man skilled in the art.
Examples of the active ingredients which may be included are; glycerin,
sorbitol,
polyols, vitimins, alpha hydroxy acids such as glycolic acid, isopropyl
myristate, IJV
filters such as benzophenone-4 and octyl dimethylpaba, fatty acids and their
esters,
silicones, amino acids, hydrolysed animal proteins, cationic surfactants,
essential oils,
animal, vegetable and mineral oils, steroids, quaternium compounds such as
quaternium-22, quaternized polymers such as poly quaternium-23, and
bactericides
such as Irgasan, amongst others.
The concentration for active ingredients in the composition of the invention
may be up
to 25% by weight, preferably 0.001% to 10% by weight based on the total weight
of the
composition.
The following optional preservatives may be used in the invention; aldehydes,
amides,
esters, phenyls, quaternary ammonium compounds, thio compounds, acids amongst
others. Examples of the preferred optional ingredients will now be given
below.
Examples of the preferred preservatives which may be used in composition of
the
present invention are; imidazolyldinil urea, EHDP, BDTA, BHT, formaldehyde,
methyl-propyl parabenes, benzalconic chloride, sodium hypochlorite, DMDM
hydantoin, quaternium-1 S, sorbic acid amongst others.
Typically the preservative concentration lies between 0% and 2% by weight.
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Hydrotropes may optionally be used in the compositions of the present
invention and
examples include alcohols, polyols and short chain alkyl aryl-sulphonates
amongst
others. The preferred hydrotropes are ethanol, glycerol and sulphonic xylene.
The concentration for hydrotropes typically lies between 0% and 10% by weight,
preferably between 2% and 6% by weight.
Examples of thickening agents that may be used in the compositions of the
present
invention are biological and synthetic polymers, carbohydrates, glyceril
esters, gums,
hydrophilic colloids, and polymeric ethers with high molecular weight, amongst
others.
Preferred thickening agents include: hydroxy-ethyl-cellulose, vinyl-carboxy-
polymer,
polyethylene glycols, and guar gum, amongst others.
Typically the thickening agents are present in an amount of between 0% and 3%
by
weight, preferably between O1% and 1% by weight.
Promotional ingredients aimed to define the specific sensory properties of the
final
product may be included in the compositions of the present invention.
Examples of promotional components include: natural and/or synthetic perfumes,
filters, dyes, sterilising agents, opaque agents, acidic and basic agents for
adjusti:lg pH
amongst others.
The concentration of promotional components in the invention may vary between
0%
and 3% by weight.
Water is typically used as the component to make up the weight of the
composition to
100%. Preferably de-ionised or distilled water is used.
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A large number of conventional natural or synthetic, porous and/or fibrous or
similar
vehicles may be used according to the present invention. These vehicles
include natural
or synthetic sponges, towels, woven and/or non-woven cloths, a combination of
the
above materials, or any other suitable vehicle for promoting the thickening
effect of the
product for the present invention, when said product is placed in contact with
water.
The results of technical and comparative tests are duly plotted in the graph
and tables
given in the figures of the present application.
The present invention will now be further described with reference to the
following
examples. The examples are not intended to limit the scope of the invention
and further
modifications within the scope of the present invention will be obvious to the
man
skilled in the art.
Examples
Tests and comparisons to exemplify the product of the present invention were
carried
out using a number of variations for the composition of the present invention
with a
range of application vehicles employed.
In the accompanying drawings:
Figs. 1 and 2 are graphs of viscosity against concentration of sodium chloride
measured in
accordance with Example 1.
Fig. 3 is a graph of viscosity against dilution of the composition of the
invention with a
known quantity of water.
Figs. 4, 5, 6 and 7 illustrate the results of test methods used in the
Examples.
An example of an application vehicle is the "SPS00 body sponge net" made by
the
Sponge Factory SA. This sponge is made of low density polyethylene, ethylene
vinyl
acetate and dye.
CA 02211313 2005-03-29
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CA 02211313 1997-07-22
12
The viscosity of the compositions of Example 1 was measured by two different
viscometers; Brookfield (see Figure 1) and Haake (see Figure 2). With the
gradual
increase in the concentration of the sodium chloride, the viscosity of the
compositions
reaches a peak with a certain electrolyte concentration (5.5% by weight of
sodium
chloride with the Brookfield and 7% by weight with the Haake), after which the
viscosity begins to fall. This is a known phenomenon.
However, it can be observed that the reverse is also true, and a liquid
composition
containing excess electrolyte (i.e. which lies on a point after the peak on
the graph in
Figures 1 and 2) which is diluted with a known quantity of water, exhibits
reversed
behaviour and the viscosity increases up to a certain point of dilution before
falling off.
This is illustrated by the results shown in the graph in Figure 3, where a
composition
with 9.5% by weight of sodium chloride was diluted to the following
proportions of
composition:water: 100:1, 90:10, 80:20, 70:30, 60:40 and 50:50. The viscosity
of each
dilution was measured on a Brookfield viscometer.
The composition in Figure 3 reaches its peak of thickening with the 70:30
dilution ratio
When using this novel composition with a vehicle, such a sponge, the product
will
thicken up in the sponge cavities and so be retained therein for a longer
period. Thus
the composition will be delivered in higher amounts to the user than
conventional
products which are much more easily rinsed away before being properly used by
the
consumer.
The low electrolytic concentration of state of the art liquid soap products
causes their
viscosity values to appear before the peak on the viscosity curve (see Figures
1 and 2),
that is, on the positive slope appearing on the rising section of the graph.
They do not
show the beneficial effects of the present compositions which lie on the
concentration
CA 02211313 1997-07-22
13
range just after the peak on the graph i.e. on the negative slope appearing on
the falling
section of the graph.
Using the above data two tests were designed to evaluate the performance of
the present
compositions compared to that of the state of the art products. These tests
are given in
Examples 2 and 3. The performance of the compositions of the present invention
and
those of the prior art for retaining liquid in the sponge and also the rinsing
capacity was
tested.
Example 2
The potential for retaining the liquid compositions within the sponge was
measured for
both a composition as according to the present invention and a composition
representing the state of the art product. The test were carried out with a
composition
of Example 1 comprising 9.5% by weight of Sodium Chloride (i.e. it is within
the
concentration range located after the peak in Figures 1 and 2).
The other composition was a state of the art composition which had an
electrolytic
concentration of 3% by weight sodium chloride (i.e. it is within the
concentration range
located before the peak of the graph in Figures 1 and 2).
The retaining potential is shown by the number of glasses or beakers required
for
complete rinsing of the product from the sponge application vehicle. Complete
rinsing
is obtained when no more foam is formed. From the tests the yield of the
product
delivered to the consumer over time is illustrated. The following test method
was used
to assess the potential for the liquid to be retained in the sponge.
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14
Method
1. 200m1 of water at 40°C (or 25°C) was poured into a series of
six 1000m1 glass
beakers. The sponge vehicle was soaked in the water, removed and shaken to
release
the maximum quantity of water so as to leave the sponge merely damp.
2. 3g of the product to be tested was weighed and placed on the sponge on the
side
opposite a strap. The sponge was then held by the strap, placed in the first
1000m1
glass beaker and plunged in the water ten times. The sponge was then squeezed
by
hand with the water and suds so released caught in the first beaker.
3. This procedure was repeated using a new 1000m1 glass beaker until the
sponge
became completely rinsed and released no foam.
4. The volumetric amount of foam in each beaker was measured and the number of
beakers taken until no more suds were formed was recorded.
5. In order to check the accuracy of the above test method the full procedure
was
repeated five more times until the measurements showed variations of less than
SOmI of
foam.
Results
The results of the above test methods are shown in Figures 4, 5, 6 and 7.
Figures 4 and 5 show the results of the composition of the present invention
(comprising 9.5% sodium chloride) in comparison with the prior art composition
(comprising 3% sodium chloride). Results at 40°C (Figure 5) and
25°C (Figure 6) are
Given.
CA 02211313 1997-07-22
Figures 6 and 7 compare the behaviour of the two compositions at both
25°C and 40°C
respectively.
For the state of the art composition which comprises 3% sodium chloride, a
lower
volumetric reading for the average total foam was noted compared with the
average
total foam recorded for the compositions of the present invention (comprising
9.5%
sodium chloride).
The prior art composition produced 945m1 of foam compared with 1085m1 of foam
produced by the composition of the present invention when measured at
40°C; this
represents an increase of 12.9%.
The prior art compositions produced a total volumetric average of foam of
745m1
compared with 995m1 of foam produced by the compositions of the present
invention
when measured at 25°C; this represents an increase of 25.1%.
On average the compositions of the present invention yield 19% more foam,
taken over
the temperature range of 25°C to 40°C.
The results illustrate that the compositions according to the present
invention, when
used with a sponge application vehicle, provide a better yield of product to
the
consumer.
The product of the present invention is retained for a longer period in a
sponge than that
of the prior art compositions it is believed because the product of the
present invention
thickens in the cavities of the sponge when it comes into contact with water.
Example 3
The rinsing capacity of the composition of the present invention and the prior
art as in
Example 2 was tested using the following method.
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16
Also tested were prior art commercial products for body or skin hygiene as
follows:
Formula A (Brazil), Formula B (Brazil), Formula C (USA), Formula D (Brazil),
Formula E (Germany), Formula F (Thailand), Formula G (China).
Method
1. 200m1 of water, at 40°C was poured into a 1000m1 beaker. A sponge as
used in
Example 2 was soaked in the water, removed, and shaken to release the maximum
quantity of water so as to leave the sponge merely damp.
2. 3g of the product to be tested was weighed and placed onto the sponge on
the side
opposite the strap. The sponge was then held by the strap, placed in
the beaker and moved backwards and forwards.
3. The sponge was held in both hands, squeezed five times whilst making
opposing
circular movements to drain the water from the sponge.
4. A further 20m1 of water at 40°C was added and the sponge squeezed a
further five
times in the same way. This was repeated until the sponge was fully rinsed.
The
number of 20m1 aliquots of water required to rinse the product from the sponge
was
recorded.
In order to check the accuracy of the above method the method was repeated
three
times, or until the results varied by less than 20m1 of water.
The results of the rinsing capacity test are shown in Figures 8 to 11.
The composition of the present invention (with a higher electrolytic
concentration) took
loner to rinse than the others , with the former needing an average of 14.33
20m1
CA 02211313 1997-07-22
17
aliquots of water to provide complete rinsing. On average the prior art
compositions
required 10.33 20m1 aliquots to provide sufficient rinsing.
As shown in Figure 8, when compared to the state of the art products, the
product of the
present invention yields 27.9% more in a terms of rinsing capacity.
All the products of the prior art share the same behaviour as that used the
composition
of Example 2 comprising 3.5% NaCI
The compositions of the present invention are shown to provide a greater yield
to the
consumer than the state of the art compositions as the former take a longer
time to rinse
from the sponge. It can be appreciated that the product of the present
invention has an
increased viscosity and is retained for a longer period in the cavities of the
sponge, is
more difficult to rinse, and gives a greater yield and better performance than
the prior
art compositions.
Example 4
The preparation method for the compositions of the present invention may vary
in
relation to temperature, pressure, agitation methods, number of premixes,
filtration,
order and location for adding either premixtures or components etc.
An example of preparation of a composition of the present invention is given
below.
The preparation of five tonnes of one of the preferred compositions of the
present
invention is described below.
1. 1851.85kg of sodium-ether-lauryl sulphate (25% active) was put into a 5
tonne tank
with 651.56kg of water added under slow and constant agitation.
2. 1 ~ 9kg of water was added to an auxiliary 2008 tank with Skg of Jaguar C
13 S and
with a small amount of 49% aqueous sodium hydroxide (to aid the dissolution of
the
CA 02211313 1997-07-22
18
Jaguar C 13 S and the adjust the pH of the water to above 10) slowly added
under
constant agitation.
3. The Jaguar C13S premix was added into the main tank and the resulting
mixture
agitated until completely homogenous
4. 40kg of silicon (50% aqueous solution) was added to the main tank under
mild
agitation followed by 333.33kg of coco amido propyl betaine (30% aqueous
solution)
with the agitation continued until the mix is completely homogenous. 6.76kg
formaldehyde (37%) was added to the main tank.
5. SOkg of perfume and Z.Skg of BHT were mixed until homogenous in an
auxiliary
60kg tank.
6. The perfumeBHT mix was added to the main tank and agitated until a
homogenous
product resulted.
7. 1900kg of saline water (25% sodium chloride solution) was added to the
homogenous product to adjust the viscosity. The saline solution was added
quickly so
as to avoid the high viscosity represented by the peaks of the graph shown in
Figures 1
and 2.
Example 5
Another composition according to the present invention was prepared following
the
method given below.
1. 2922kg of LESS (20.7% active) were added into a main tank which was heated
to
60°C with mild agitation.
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19
2. 250kg of water was poured into a 350kg auxiliary tank and heated to
60°C with 9.6kg
of carbopol added under constant agitation followed by SOkg of LESS (27%
active) and
the mixture agitated until all clots of carbopol had been dissolved. This
solution was
then added to the main tank.
3. 150kg of water was poured into a 350kg auxiliary tank and heated to
65°C. 144kg of
ethylene glycol mono and distearate mix and SOkg of LESS were added to the
water.
Agitation was continued until the ethylene glycol mono and distearate
dissolved. This
mixture was then poured into the main tank and the product in the main tank
agitated
until it became homogenous.
4. 154.9kg of water was added into a 250kg auxiliary tank with 4.8kg of Jaguar
C 13 S
under constant agitation, again a little sodium hydroxide (49%) solution, was
added to
help dissolve the Jaguar and adjust the pH to greater than 10. The Jaguar C 13
S premix
was added to the main tank followed by 240kg of silicon emulsion (50% active).
5.A premix of 48kg perfume, 6.3kg formaldehyde and 2.4kg of BHT was prepared
in a
100kg auxiliary tank with the mixture agitated until the components were
completely
dissolved. When the temperature of the composition in the main tank had
dropped to
below 40°C the perfume/BHT/formaldehyde premix was added followed by
480kg of
coco amido propyl betaine.
6. 288kg of saline solution was added to the main tank to increase the total
weight of
the composition up to 4800kg.
