Note: Descriptions are shown in the official language in which they were submitted.
1~327~9
- l - C.3034
AQUEOUS CONCENTRATED FABRIC SOFTENING COMPOSITION
This invention relates to an aqueous concentrated
fabric softening composition, in particular to such a
composition which contains more than 10% by weight of a
water-insoluble cat ionic fabric softener.
Concentrated fabric softening compositions
containing more than 10% by weight of a water-insoluble
cat ionic fabric softener suffer from the disadvantage of
high viscosities which inter aria makes such products
difficult to process. It has been proposed in European
Patent Specification No EP-A-56695 (PROCTER & GAMBLE) that
viscosity can be controlled by the use of small
quantities, specifically up to 3% by weight of alkoxylated
amine.
We have now surprisingly discovered that the
processing of concentrated fabric softening compositions
can be improved by the inclusion of higher levels of other
specific alkoxylated fatty compounds. The benefit of
this improved processing can be seen in a lower initial
product viscosity.
~X;~27~3~
- 2 - C.3034
Thus, according to the invention, there is provided
an aqueous concentrated fabric softening composition
comprising:
( i) an aqueous base;
( ii) more than 10% by weight of a water-insoluble
cat ionic fabric softener; and
(iii) more than 4% by weight of a non ionic material which
comprises an alkaline oxide adduce of a fatty
compound selected from fatty alcohols, fatty acids,
fatty esters, and fatty acid asides, the fatty
compound containing at least 10 carbon atoms and the
adduce containing an average of not more than 7
alkaline oxide groups per molecule, when the fatty
compound is a fatty acid or a fatty ester and not
more than 4 alkaline oxide groups per molecule when
the fatty compound is a fatty alcohol or a fatty
acid aside,
the total level of the cat ionic softener and the non ionic
material being not more than 36% by weight, preferably not
more than about 25% by weight.5
The level of cat ionic softener in the composition is
preferably from 10.5% to 21% by weight. The level of the
non ionic material in the composition is preferably from
4.5% to 12.0% by weight. The weight ratio of the0 cat ionic softener to the non ionic material is preferably
at least 1:1, such as between about 1.5:1 and about 3:1.
The water-insolub~e cat ionic fabric softener can be
any fabric-substantive cat ionic compound which has a
US volubility in water at pi 2.5 and 20C of less than 10
g/l. Highly preferred materials are qua ternary ammonium
~3270~
_ 3 _ C.3034
salts having two C12-C24 alkyd or alkenyl chains,
optionally substituted or interrupted by functional groups
such as -OH, -O-, -CON, -COO-, etc.
Well known species of substantially water-insoluble
qua ternary ammonium compounds have the formula
\ / 3
N X
I R4
wherein Al and R2 represent hydrocarbyl groups from about
15 12 to about 24 carbon atoms; R3 and R4 represent
hydrocarbyl groups containing from 1 to about 4 carbon
atoms; and X is an anion, preferably selected from halide,
methyl sulfate and ethyl sulfate radicals. Representative
examples of these qua ternary softeners include disallow
dim ethyl ammonium chloride; disallow dim ethyl ammonium
methyl sulfate; dihexadecyl dim ethyl ammonium chloride;
di(hydrogenated tallow alkyd) dim ethyl ammonium chloride;
dioctadecyl dim ethyl ammonium chloride; dieicosyl dim ethyl
ammonium chloride; didocosyl dim ethyl ammonium chloride;
di(hydrogenated tallow) dim ethyl ammonium methyl sulfate;
dihexadecyl deathly ammonium chloride; diIcoconut alkyd)
dim ethyl ammonium chloride. Disallow dim ethyl ammonium
chloride, di(hydrogenated tallow alkyd) dim ethyl ammonium
chloride, di(coconut alkyd) dim ethyl ammonium chloride and
di(coconut alkyd) dim ethyl ammonium methosulfate are
preferred.
Another class of preferred water-insoluble cat ionic
materials are the alkylimidazolinium salts believed to
have the formula:
1~3~ 4 - C.3034
OH 2
C / N - C2H4 I C R7
R6
I
wherein R6 is an alkyd or hydroxyalkyl group containing
from 1 to 4, preferably 1 or 2 carbon atoms, R7 is an
alkyd or alkenyl group containing from 8 to 25 carbon
atoms, R8 is an alkyd or alkenyl group containing from
to 25 carbon atoms, and Rug is hydrogen or an alkyd
containing from 1 to 4 carbon atoms and A is an anion,
preferably a halide, methosulfate or ethosulfate.
Preferred imidazolinium salts include l-methyl-l-
(tallowylamido-) ethyl -2-tallowyl- dodder
imidazolinium methosulfate and l-methyl-l-
(palmitoylamido)ethyl -2~octadecyl-4,5- dodder-
imidazolinium chloride. Other useful imidazolinium
materials are 2-heptadecyl-1-methyl-1- (2-stearylamido)-
ethyl-imidazolinium chloride and 2-lauryl-1-hydroxyethyl-
25 _ l-oleyl-imidazolinium chloride.
Representative commercially available materials of
the above classes are the qua ternary ammonium compounds
Argued 2HT (ox AWAKES); Noramium MUSH Rex SEIKO); Aliquat-2HT
(Trade Mark of General Mills Inch and the imidazolinium
compounds Varisoft 475 (Trade Mark of Shrieks Company,
Columbus Ohio) and Rocket Wow (Trade Mark of REDO).
~X327~9
_ 5 _ C.3034
The non ionic material is, or includes, an alkaline
oxide adduce of various fatty compounds as specified
above, but may also include other alkoxylated or non-
alkoxylated non ionic materials.
Alkaline oxide adduces of fatty alcohols useful in
the present invention, preferably have the general
formula:
(On Noah
wherein R10 is an alkyd or alkenyl group having at least
10 carbon atoms, most preferably from 10 to 22 carbon
atoms, y is not more than 4.0, such as from about 0.5 to
about 3.5 and n is 2 or 3. Examples of such materials
include Synperonic A (ox ICY) which is a C13-C15 alcohol
J` with about three ethylene oxide groups per molecule and
Empilan By (ox Martian) which is Laurie alcohol LEO.
Alkaline oxide adduces of primary alcohols are preferred
over those of secondary alcohols.
Alkaline oxide adduces of fatty acids useful in the
present invention, preferably have the general formula
R -I (CnH2n)yH
wherein R10, and n are as given above and y is preferably
not more than 4.0, such as from about 0.5 to about 3.5.
Suitable examples include ESONAL:~0334 (ox Diamond
Shamrock) which is a tallow fatty acid with about 2.4
ethylene oxide groups per molecule.
Alkaline oxide adduces of fatty esters useful in the
present invention include adduces of moo-, dip or
trimesters of polyhydric alcohols containing 1 to 4 carbon
~e,qof~ 5 ye US
Lo
6 - C.3034
atoms with not more than 4.0, such as from about OHS to
about 3.5 alkaline oxide groups per molecule; such as
coconut or tallow oil (triglyceride) LEO (ox Sterno
Dobbs).
Alkaline oxide adduces of fatty acid asides useful
in the present invention, preferably have the general
formula
jCnH2nO) XTI
Rho -I -N
\
(Cn~2n) z
wherein R10 and n are as given above, and x and z in total
are not more than 4.0, such as from about 0.5 to about
3.5, while one of x and z can be zero. Examples of such
materials include tallow monoethanolamide and
diethanolamide, and the corresponding coconut and soya
compounds.
The viscosity of the product, when measured at
110 sea l shear rate should be less than about 150 cup,
25 preferably between about 20 and about 100 cup and the
product can ye added as such to a fabric rinse liquor or
may be pre-diluted with water.
Preferably, the compositions of the invention
contain substantially no anionic material, in particular
no anionic surface active materials. If such materials
are present, the weight ratio of the cat ionic material to
the anionic material should preferably be more than 10:1,
such as more than 100:1.
The compositions may include electrolytes to assist
in controlling the viscosity of the product. A suitable
~Z3~:7~
_ 7 C.3034
electrolyte level in the compositions is from about 0.01%
to about 0.5%, most preferably from about 0.02% to about
0.2%, measured as the an hydrous salt. Examples of
suitable materials include the ionic salts of sodium,
potassium, lithium, magnesium, calcium or aluminum, such
as lithium chloride, sodium chloride, ammonium chloride,
sodium methosulphate, sodium bonniest, calcium chloride,
magnesium chloride or aluminum chloride. Of these,
sodium and potassium salts are less preferred.
The compositions may include low levels of solvents
for the cat ionic fabric softener. Indeed, the cat ionic
raw materials will often include isopropanol as a solvent
It is preferred that the level of isopropanol or any other
C1-C4 mandrake alcohol in the composition is less than
about 10% by weight, most preferably less than about 5% by
weight.
Additionally the composition can contain substances
for maintaining the stability of the product on cold
storage. examples of such substances include polyhydric
alcohols such as ethylene glycol, propylene glycol,
glycerol and polyethylene glycol. A suitable level for
such materials is from about 0.5% to about 5%, preferably
about 1.0% to 2.0% by weight.
The compositions of the invention may further
include other additional ingredients including colorants,
perfumes, preservations, anti-foams, optical brighteners,
pacifiers, pi buffers (the preferred pi for the
compositions is between about 3 and about 8, such as from
about 4 to about 6), further viscosity modifiers,
non-cationic fabric conditioning agents, anti-shrinkage
agents, anti-wrirkle agents, fabric crisping agents,
spotting agents, soil-release agents, germicides,
anti-oxidants and anti-corrosion agents.
>7~g
- 8 - C.3034
The compositions of the invention may be prepared by
a variety of methods. One suitable method is to form a
molten mixture of the cat ionic fabric softener and the
non ionic material, add this molten mixture to water with
stirring to form a dispersion and thereafter adding any
optional ingredients.
The invention will now be illustrated by the
following Examples, where all parts and percentages are by
weight. Where commercially available materials are
referred to, the percentages quoted are of the active
ingredients therein. Viscosities were measured in a
Hake Rotorviscometer (Model REV 2) at 110 sea 1 at 25C.
EXAMPLES 1 TO 18
Compositions were prepared according to the
formulations in the following Tables. The compositions
were prepared by forming a molten mixture of the cat ionic
and non ionic ingredients at 65C, adding to water at the
same temperature, stirring to form a dispersion, adding
electrolyte in the form of a saturated solution, cooling
and then adding perfume. The compositions were made in
batches of 100g. Stirring was continued for 7 minutes at
zoo rum.
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~L~3;27~9
- I - C.3034
EXAMPLES 19 AND 20
In order to demonstrate the effect of the degree of
alkoxylation of the non ionic adduce on the initial
viscosities of products according to the invention, the
following compositions were prepared using the method
described in Example 1:
Example No: 19 AYE 20 AYE
10 Ingredients (%)
Argued 2HT 10.5 10.5 10.5 10.5
Synperonic Aye 7.0 - - -
Synperonic Aye - 7.0
15 Cocodiethanol aside - - 7.0
Genogen CA 0505 - - - 7.0
Calcium chloride 0.05 0.05 0.05
Water -----------balance-----------
Initial viscosity (cup) 40 500 78 >500
Notes:
3 - A commercially available alkoxylated alcohol which
is approximately straight chain I -C15 alcohol with
3 HO groups per molecule.
4 - As Synperonic A but with 11 HO groups per molecule.
5 - A commercially available material (ox HOECHST)
believed to be the addition product of coconut fatty
monoethanolamide with 5 moles of ethylene oxide.
