Canadian Patents Database / Patent 1293421 Summary
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|(12) Patent:||(11) CA 1293421|
|(21) Application Number:||513226|
|(54) English Title:||SPRAY-DRIED GRANULAR DETERGENT COMPOSITIONS CONTAINING NONIONICSURFACTANT, POLYETHYLENE GLYCOL, AND POLYACRYLATE|
|(54) French Title:||COMPOSITIONS DETERGENTES GRANULAIRES, SECHEES PAR PULVERISATION, A BASE DE SURFACTIF NON IONIQUE, DE POLYETHYLENE GLYCOL ET DE POLYACRYLATE|
- Bibliographic Data
- Representative Drawing
- Admin Status
- Owners on Record
|(52) Canadian Patent Classification (CPC):||
|(51) International Patent Classification (IPC):||
|(72) Inventors :||
|(73) Owners :||
|(71) Applicants :|
|(74) Agent:||KIRBY EADES GALE BAKER|
|(74) Associate agent:||KIRBY EADES GALE BAKER|
|(22) Filed Date:||1986-07-07|
|(30) Availability of licence:||N/A|
|(30) Language of filing:||English|
|(30) Application Priority Data:|
SPRAY-DRIED GRANULAR DETERGENT COMPOSITIONS
CONTAINING NONIONIC SURFACTANT, POLYETHYLENE
GLYCOL, AND POLYACRYLATE
Abstract of the Disclosure
Detergent compositions comprising a mixture of a nonionic
surfactant, a polyethylene glycol and polyacrylate of specified
molecular weight for improved physical properties and cold water
dispersion are disclosed.
- 12 -
1. A spray-dried granular detergent composition comprising:
(a) from about 5% to about 50% of a non-soap anionic
surfactant or mixtures thereof; and
(b) from about 1% to about 10% of a mixture of nonionic
surfactant, polyethylene glycol and a polyacrylate, said
mixture being added in a crutcher, said nonionic
surfactant comprising a polyethylene condensation
product of an aliphatic alcohol containing from about 10
to about 20 carbon atoms or an alkyl phenol,
wherein the alkyl group contains from about 6 to about 15 carbon
atoms, condensed with from about 3 to about 12 moles of ethylene
oxide per mole of alcohol or alkyl phenol, said polyethylene glycol
having a weight average molecular weight of from about 1000 to
about 20,000, and said polyacrylate having a weight average
molecular weight of from about 1,000 to about 20,000; the ratio of
polyethylene glycol to polyacrylate being from about 10:1 to 1:10,
and said nonionic surfactant comprising from about 10% to about
80% of the mixture.
2. The composition of Claim 1 wherein the mixture of nonionic
surfactant, polyethylene glycol and polyacrylate comprises from
about 1% to about 5% of the composition.
3. The composition of Claim 2 wherein the nonionic surfactant
comprises from about 25% to about 70% of the mixture and the
ratio of polyethylene glycol to polyacrylate is from about 3:1 to
4. The composition of Claim 3 wherein the polyethylene glycol
has a weight average molecular weight of from about 2000 to about
12,000, and the polyacrylate has a weight average molecular
weight of from about 2,300 to about 10,000.
5. A composition according to Claim 3 wherein the polyacrylate
is sodium polyacrylate.
6. The composition of Claim 3 further comprising:
(c) from about 10 to about 60% of a detergency builder; and
(d) from about 1% to about 10% of an alkali metal silicate
having a ratio of from about 1.6 to about 2.4.
7. A spray-dried granular detergent composition comprising:
(a) from about 10% to about 30% of non-soap anionic
surfactant selected from the group consisting of
alkali metal salts of C11-13 alkylbenzene sulfonates,
C14-18 alkyl sulfates, C14-18 alkyl polyethoxysulfates
containing from about 1 to about 4 moles of ethylene
oxide and mixtures thereof;
(b) from about 1% to about 5% of said mixture of nonionic
surfactant, polyethylene glycol, and polyacrylate
wherein said nonionic surfactant is an ethylene oxide
condensate of an aliphatic alcohol containing from
about 10 to about 18 carbon atoms or alkyl phenol,
wherein the alkyl group contains from about 9 to about
13 carbon atoms, condensed with an average of from
about 4 to about 8 moles of ethylene oxide per mole of
alcohol or alkyl phenol, said polyethylene glycol
having a weight average molecular weight of from about
2,000 to about 12,000, said polyacrylate being sodium
polyacrylate having a weight average molecular weight
of from about 3,000 to about 8,000, the nonionic
surfactant comprising from about 35% to about 60% of
the mixture, the weight ratio of polyethylene glycol
to polyacrylate being from about 1:3 to 3:1, and
wherein said mixture is added in a crutcher; and
(c) from about 10% to about 60% of inorganic phosphate
detergency builder selected from the group consisting
of alkali metal phosphonates and polyphosphates.
8. The composition of Claim 7 further comprising:
(c) at least about 20% of the detergency builder; and
(d) from about 0.5% to about 8% of an alkali metal
silicate having a ratio of from about 1.4 to about
9. A spray-dried granular detergent composition comprising:
(a) from about 10% to about 30% of non-soap anionic
surfactant comprising a mixture of alkali metal salts
of C11-13 alkyl benzene sulfonates, and C14-18 alkyl
sulfates wherein the ratio of the alkyl sulfonate to
the alkyl sulfate is from about 3:1 to about 1:3,
(b) from about 1% to about 5% of a mixture of:
(1) nonionic surfactant comprising an ethylene oxide
condensate of an aliphatic alcohol, wherein the
alkyl group contains from about 10 to about 18
carbon atoms, and is condensed with from about 4
to about 8 moles of ethylene oxide per mole of
(2) a polyethylene glycol with a weight average
molecular weight of from about 4,000 to about
(3) a sodium polyacrylate with a weight average
molecular weight of from about 3,000 to about
8,000, wherein the nonionic comprises from about
35% to about 60% of the mixture, the ratio by
weight of polyethylene glycol to sodium poly-
acrylate is from about 1:3 to about 3:1 and
wherein said mixture is added in the crutcher;
(c) from about 20% to about 60% of an alkali metal
tripolyphosphate, pyrophosphate or mixtures thereof as
10. A composition according to Claim 9 also comprising from
about 0.5 to about 8% of sodium silicate solids having a molar
ratio of SiO2:Na2O of from about 1.6 to about 2.2.
- 15 -
11. A composition according to Claim 9 wherein the mixture of
anionic surfactants has about a 1:1 ratio on a weight basis.
12. A process for spray drying a granular detergent composition
according to Claim 1 wherein the components are mixed in the
crutcher along with enough additional water so that the water
content of the crutcher paste is from about 25% to about 50% and
then spray dried with an inlet air temperature of from about
400°F (204°C) to about 800°F (427°C).
13. The process of Claim 12 wherein the water content of the
crutcher paste is from about 28% to about 40% and the inlet air
temperature in the spray tower is from about 500°F (260°C) to
about 700°F (371°C).
SPRAY-DRIED CRANULAR DFTERCENT COMPOSITIONS
CONTAINING NONIONIC SURFACTANT, POLYETHYLENE
GLYCOL, AND POLYACR'fLATE
Mark Edward Cushman
The present invention relates to spray-dried, granular
Summary of the invention
The present invention encompasses a spray-dried granular
detergent composition comprising:
(a) from about 5g6 to about 50% by weight of a nonsoap
anionic detergent surfactant; and
(b) from about 1~ to about 10% of a mixture of nonionic
surfactant, comprising an ethoxylated alcohol or alkyl phenol,
polyethylene glycol and a polyacrylate, said nonionie surfactant
comprlsing from about 1096 to about 8096 of the m5xture, said
polyethylene glycol having a weight average molecular welght of
from about 1,000 to about 20,000, and said polyacrylate having a
weight average molecular weight of from about 1,00~ to about
20,000 said mixture having a polyethylene glycol:polyacrylate
weight ratio of from about 1:10 to about 10:1, and wherein such
mixture is added in the crutcher.
Detailed Description of the Invention
The detergent compositions of the present invention contain
a nonsoap anionic detergant surfactant, and a mixture of a
nonionic sur~actant, a polyethylene glycol of selected molecular
weight and a polyacrylate polymer of selected molecular weight.
The nonionic surfactantlpolyethylene glycollpolyacrylate mixtures
30 herein provide a surprising boost to dispersion rates and
improvement in physical properties.
The compositions of the present invention are prepared by
`~ spray drying and have superior physical characteristics.
The detergent compositions herein contain from about 5% to
about Sû%, preferably from about 10% to about 30% of a nonsoap
anionic surfastant, or mixtures thereof. Surfactants useful
herein are listed in U . S . Patent 3, 664, 961, Norris, issued May
23, 1972, and in U.5. Patent 3,919,678, Laughiin et al, issued
December 30, 1975.
Useful anionic surfactants include the water-soluble salts,
preferably the alkali metal salts, of organic sulfuric reaction
products having in their rnolecuJar structure an alkyi group
containing from about 9 to about 20 carbon atoms as~d a sulfonic
acid or sulfuric acid ester group. (Included in the term "alkyl"
is the alkyl portion of acyl groups. ) Examples of this group of
synthetic surfactants are the sodium and potassium alkyl sulfates,
lo especially those obtained by sulfating the higher alcohols (C8-C18
carbon atoms) such as those produced by reducing the glycerides
of tallow or coconut oii; and the sodium and potassium alkyl-
benzene sulfonates in which the alkyl group contains from about 9
to about 15 carbon atoms, in straight chain or branched chaln
configuratlon , e.g., those of the type descrlbed In U. S. Patents
2,220,099 and 2,477,383. Especially valuable are linear
straight chain alkylbenzene sulfonates in which the average
number of carbon atons in the alkyl group is Erom about 11 to
2a 13, abbrevi~ted as C11_13L~S
Other anionic surfactants suitable for use herein are the
sodium alkyl glyceryl ether sulfonates, especially those ethers of
higher alcohols derived from tallow and coconut oil; sodium coco-
Z5 nut oil fatty acid monoglyceride sulfonates and sulfates; sodium orpotassium salts of alkyl phenol ethylene oxide ether sulfates
containing frorn about 1 to about 10 units of ethylene oxide per
molecule and from about 8 to about 12 carbon atoms in the alkyl
group and sodium or potassium salts of alkyl ethylene oxide
ether sulfates containing from about 1 to about 10 units of
ethylene oxide per molecule and ~rom about 10 to about 20 carbon
atoms in the alkyl group.
Other useful anionic surfactants include the water-soluble
salts of esters of alpha-sulfonated fatty acids containing from
35 about 6 to 20 carbon atoms in the fatty acid group and from
about 1 to 10 carbon atoms in the ester group; water-soluble salts
of 2-acyloxy-aikane~1-sulfonic acids containing from about 2 to 9
carbon atoms in the acyl group and from about 9 to about 23
carbon atoms in the alkane moiety; alkyl ether sulfates containing
from about 10 to 20 carbon atoms in the alkyl group and from
about 1 to 30 moles of ethylene oxide; water-soluble salts of olefin
or paraffin sulfonates containing from about 12 to 18 carbon
atoms; and beta-alkyloxy alkane sulfonates containing from about
1 to about 3 carbon atoms in the alkyloxy group and from about 8
~; to about 20 carbon atoms in the alkane moiety.
Particularly preferred surfactants for use herein include
sodium Cl~ 13LAS~ C14 18 alkyl sulfateS, Cl4_18 y
polyethoxy sulfates containing from about 1 to abouL 4 moles of
ethylene oxide, and mixtures thereof.
Nonionic Surfactant/Polyethy!ene Glycot/Polyacrylate Mixture
The composltions of the present invention contain from about
1% to about 10%, preferably from about 196 to about 5%, more
preferably from about 2% to about 4~, of a mixture of a
polyethoxylate nonionic surfactant, a polyethylene glycol and a
Suitable nonionic surfactants include the polyethylene oxide
condensates of alkyl phenols~ e. g ., the condensation products of
alkyl phenols having an alkyl group containing from about 6 to
about 15, preferably from about 9 to about 13, carbon atoms, in
either a straight chain or branched chain configuration, with from
about 3 to about 12, preferably from about 4 to about 8, moles of
ethylene oxide per mole of alkyl phenol.
Preferred nonionics are the water-soluble condensation
products of aliphatic alcohols containing from about 8 to about 20,
preferably from about ~10 to about 18, carbon atoms, in either
straight chain or branched configuration, with from about 3 to
about 12, preferably from about 4 to about 8, moles of ethylene
oxide per mole of alcohol. Particularly preferred are the
condensation products of alcohols having an alkyl group
containing from about 10 to about 16 carbon atoms with from
about 4 to about 8 moles of ethylene oxide per mole of alcohol.
-- 4 --
The nonionic surfactant comprises by weight from about 10%
to about 80% preferably from about 2596 to about 7~96 more
preferably from about 35% to about 60~ of the mixture.
The polyethylene glycol has a weight average molecular
weight of from about 1 000 to about 20 000 preferabty from about
2 000 to about 12 000 more preferably from about 4 000 to about
10 000. The polyacrylate has a weigllt average molecular weight
of from about 1 000 to about 20 000 preferabiy from about 2 000
to about 10 000 more preferably from about 3 000 to about 8 000.
The polyethylene glycol and the poiyacrylate are present in
a weight ratio of from about 1:10 to about 10:1 preferably from
about 1:3 to about 3:1 more preferably from about 2:1 to about
1 : ~ .
While polyethylene glycols are preferred other suitable
polymeric materials are the condensatiQn products of C10 20
alcohols or C8 18 alkyl phenols with sufficient ethylene oxide
i . e . more than 50~ by weight of the polymer so that the
resultant product has a melting point above about 35C.
Preferred polymers contain at least about 70% ethylene oxide
by weight and more preferred polymers contain at least about 8û~
ethylene oxide by weight. Preferred polymeric materials have
H LB values of at least about 15 and more preferably at least
about 17. Block and heteric polymers based on ethylene oxide
and propylene oxide addition to a low molecular wei~ht organic
compound containing one or more active hydrogen atoms are
suitabte in the practice of the invention. Polymers based on the
addition of ethylene oxide and propylene oxide to propylene
glycol ethylenediamine and trimethylolpropane are commercially
available under the names Pluronics Pluronic R Tetronics and
Pluradots from the BASF Wyandotte Corporation of ~IYyandotte
Michigan. Corresponding nonproprietary names of the first three
trade names are poloxamer meroxapol and poloxamine respec-
Optimum solubility of the polyacrylate is obtained when it is
in the form of an at least partially neutralized allcaii metal salts.
The sodium salts are most preferred.
Suitable polyacrylates herein are the partially or fully
neutralized salts of polymers of acrylic acid. One can also use
copolymers formed with small amounts of other copolymerizable
monomers. The percentage by weight of the polyacrylate units
which is derived from acrylic acid is preferably greater than
about 8~. Suitable copolymerizable monomers include, for ex-
ample, methacrylic acid, hydroxyacrylic acid, vinyl chloride,
vinyl alcohol, furan, acrylonitrile, methacrylonitrile, vinyl
acetate, methyl acrylate, methyl methacrylate, styrene, alpha-
methylstyrene, vinyl methyl ether, vinyl ethyl ether, vinyl propyl
ether, acrylamide, ethylene, propylene and 3~butenoic acid.
Mixtures of these polymers can also be used. The polyacrylate
may also be added In the acid form and neutrallzed by various
Preferred copolymers of the above group contain at least
about 90% by weight of units derived from the acrylic acid.
Preferably essentially all of the polymer is derived from acrylic
acid. Particularly preferred is sodium polyacrylate, especially
when it has an average molecular weight of from about 3,000 to
It is essential that this mixture be added in the crutcher
rather than post dosed for the benefits of the invention to be
The compositions of the invention can additionally contain up
to 10%, preferably about 5~ of an organic surfactant selected from
the group consisting of zwitterionic, ampholytic, and cationic
surfactants and mixtures thereof. The compositions can aiso
contain other conventional ingredients, such as nonphosphorous
builders, either organic or inorganic in nature.
Optional ampholytic surfactants include derivatives of ali-
phatic, or aliphatic derivatives of heterocyclic, secondary and
tertiary amines in which the aliphatic moiety can be straight
chain or branched and wherein one of the aliphatic substituents
contains from about 8 to about 1 B carbon atoms and at least one
aliphatic substituent contains an anionic watler-solubilizing group.
Useful cationic surfactants include those described in U. S .
Patent 4 222 905 Cockrell issued September 16 1980 and in
U.S. Patent 4 239 659 Murphy issued December 16 1980
Optional ~witterionic surfactants include derivatives of ali-
phatic quaternary ammonium or phosphonium or ternary sulfonium
compounds in which one of the aliphatic substituents contains
from about 8 to about 18 carbon atoms.
Also useful in the compositions of the invention are alkyl-
polysaccharide surfactants. The preferred alkylpolyglycosides
ha~te the formula RO(CnH2nO)t(glycosyl)x wherein R Is selected
from the group consistlng of alkyl atkylphenyl hydroxyalkyl
hydroxyalkylphenyl and mixtures thereof in which said alkyl
groups contain from about 10 to about 18 preferably from about
12 to about 14 carbon atoms n is 2 or 3 preferably 2 t is from
0 to about 10 preferably 0 and x is from about 1-114 to about
10 preferably from about 1-1/3 to about 3 most preferably from
about 1-1/3 to about 2. The glycosyl is preferably derived from
Detergency builders are preferred optional ingredients when
included the level of detergency builder is from 0% to about 60~
prefer~bly from about 10% to about 60% more preferably from
about 2096 to about 609~ of the composition.
Preferred detergency builders include the various
water-soluble alkali metal ammonium or substitutecl ammonium
phosphates polyphosphates phosphonates polyphosphonates
carbonates sil7cates and borates.
Especially preferred for use in compositions of the invention
are the inorganic phosphate builders.
Specific examples of inorganic phosphate buiiders are sodium
and potassium tripolyphosphate pyrophosphate polymeric
-- 7 --
metaphosphate having a degree of polymerization of from about 6
to 21, and orthophosphate. Examples of polyphosphonate builders
are the sodium and potassium salts of ethylene-1, 1-diphosphonic
acid, the sodium and potassium salts of ethane l-hydroxy-l,
1-diphosphonic acid and the sodium and potassium salts of ethane,
l ,1, 2-triphosphonic acid. Other phosphorus builder compounds
are disclosed in U.S. Pat. Nos. 3,159,581, 3,~13,030; 3,422,021
3,422,137; 3,400,176 and 3~4OOI148D Sc~ium tripclyp~osphate and
pyrophosphate are particularly preferred.
The detergent compositions of the invention can also
optionally contain water-insoluble aluminosilicate ion exchange
material of the formula
Naz[ ~AlOj!)z~ tslo2)yl xH2o
whereln z and y are at least about 6, the molar ratio of z to y Is
from about 1.0 to about 0.5 and x is from about 10 to about 264.
Amorphous hydrated aluminosilicate materials useful herein have
the empirical formula
M (zAlO2 Y5iO2)
wherein M Is sodium, potassium, ammonium or substituted ammon-
ium, z is from about 0 . 5 to about 2 and y is 1, said material
having a magnesium ion exchange capacity of at least about 50
milligram equivalents of CaCO3 hardness per gram of anhydrous
The aluminosilicate ion exchange builder materials herein are
in hy~rated form and contain from about 10% to about 28~ of
water by weight if crystalline, and potentially even higher
amounts of water if amorphous. Highly preferred crystalline
aluminosilicate ion exchange materials contain from about t8~6 to
about 22~ water in their crystal matrix. The crystalline alumino-
silicate ion exchange materials are further characterized by a
particle size diameter of from about 0.1 micron to about 10
microns. Amorphous materials are often smaller, e.g., down to
Iess than about 0. 01 micron . Preferred ion exchange materials
have a particle size diameter of from about 0.2 micron to about 4
microns. Th0 term particle size diameter herein represents the
average particle size diameter of a given ion exchange materiat a
determined by conventional analytical techniques such as, for
example, microscopic determination utilizing a scanning electron
5 microscope. The crystalline aluminosilicate ion exchange materials
herein are usually further characterized by their calcium ion
exchange capacity, which is at least about 200 mg. equivatent of
CaCO3 water hardness/g. of aluminosilicate, calculated on an
anhydrous basis, and which generally is in the range of from
about 300 mg . eq . /9. to about 352 mg. eq . Ig. The atuminosili-
cate ion exchange materials herein are still further characterized
by their calcium ion exchange rate which is at least about 2
grains Ca++lgallonlminutelgramlgallon of alumlnosilicate (anhy-
drous basis), and generally lles within the range of from about 2
grainslgallonlminutelgramlgallon to about 6 grains/gallonlminutel-
gramlgallon, based on calcium lon hardness. Optimum alumino-
silicate for builder purposes exhibit a calcium ion exchange rate
of at least about 4 grains/gallon/minute/gram/gallon.
The amorphous aluminosilicate ion exchange materials usually
have a Mg~+ exchange capacity of at least about 50 mg. eq.
CaCO21g. (12 mg. Mg+~lg.l and a Mg+~ exchange rate of at ieast
about 1 grainlgallon/minutelgramlgallon. Amorphous materials do
not exhibit an observable diffraction pattern when examined by
Cu radiation ~1.54 Angstrom Units).
Aluminosilicate ion exchange materials useful in the practice
of thi invention are commercially available. The aluminosilicates
useful in this invention can be crystalline or amorphous in
structure and can be naturally-occurring aluminosilicates or
synthetically derived. A method for producing aluminosilicate ion
exchange materials is discussed in U.S. Patent 3,985,669,
: Krummel, et al, issued Cctober 12, 1976. Preferred synthetic
; . crystalline aluminosilicate ion exchange materials useful herein
are available under the designations Zeolite Ar Zeolite B, and
~ Zeolite X~ In an especially
preferred embodiment, the crystalline aiuminosilicate ion exchange
material has the formula
wherein x is from about 20 to about 30, espe~cially about 27.
Water-soluble, nonphosphorus organic builders useful herein
include the various alkali metal, ammonium and substituted ammon-
ium, carboxylates, nonpolymeric polycarboxylates and
~` polyhydroxysulfonates. Examples of nonpolymeric polycarboxylatebuilders are the sodium, potassium, lithium, ammonium and
substituted ammonium salts of ethylenediaminetetraacetic acid,
nitrilotriacetic acid, oxydisuccinic acid, mellitic acid, benzene
polycarboxylic acids, and citric acid. The compositions of this
invention only contain the limlted amount of polyacrylate defined
Other useful bullders herein are sodium and potassium
carboxymethyloxymalonate, carboxymethyloxysuccinate, cis-cyclo-
hexanehexacarboxylate, cls-cyclopentanetetracarboxylate, and
Other suitable nonpolymeric polycarboxylates are the poly-
acetal carboxylates described in U . S . Patent 4 ,144, 226, issued
March 13, 1979 to Crutchfield, et al, and U.S. Patent 4,246,495,
issued ~Sarch 27, 1979 to Crutchf ield, et al . These polyacetyl
carboxylates can be prepared by bringing together under
polymerization conditions an ester of glyo~ylic acid and a
polymerization initiator. The resulting polyacetal carboxylate
ester is then attached to chemically stable end groups to
stabilize the polyacetyl carboxylate against rapid depolymeri-
zation in alkaline solution, and converted to the corresponding.
The compositions herein preferably contain from about 0% to
about 10%, preferably from about 0 . 5% to about 8%, and most
preferably from about 1% to about 796, by weight of an alkali metal
silicate having a molar ratio of SiO2 to alkali metal oxide of from
about 1,0 to about 3,2, preferably from about 1.4 to about 2.4.
-- 10 --
Sodium silicate, particularly one having a moiar ratio of about 1.6
to about 2.2 is preferred.
The alkali metal silicates can be purchased in either liquid or
granular form. Silicate slurries can conveniently be used to
5 avoid having to dissolve the dried form in the crutcher mix of the
Other ingredients commonly used in detergent compositions
can be included in the compositions of the present invention.
These include color speckles, bleaching agents such as perborates
lo and percarbonates and bleach activators, suds boosters or suds
suppressors, antitarnish and anticorrosion agents, soil suspending
agents, soil release agents, dyes, fillers, optical brighteners,
germicides, pH adjusting agents, nonbuilder alkalinity sources,
hydrotropes such as toluene sulfonates and xylene sulfonates,
15 enzymes, enzyme-stabilizing agents, perfumes and water.
The detergent compositions of the present invention can
comprise a portion of compositions containing a wide variety of
materials suitable for detergent or other uses.
The following nonlimiting examples illustrate the detergent
20 compositions of the present invention.
Ail percentages, parts, and ratios used herein are by weight
` unless otherwise specified.
CONIPARATIVE EXAMPLE I
A base product was prepared by spray drying according to
25 the following formula.
Na C13 linear alkyl sul-
fonate (EAS) 10.3
Na C14_15 alkyl sulfate (AS) 10.3
Na tripolyphosphate 43.3
Na silicate solids (1.6r) 6.9
Na sulfate 17 . 0
Na carbonate (dry mixed)15.5
Die$hylenetriamine pentacetate 0 . 7
Minor ingredients and water balance
, . .
- 11 -
EXAMPLE l l
The base product was produced according to Example I with
varying ratios of polyethylene glycol (PEG) with a weight average
moiecular weight of 8 000 and sodium polyacrylate with weight
5 average molecular weight of 4 500 and nonionic surfactant
(C12 13E6 5 topped) as shown below added in the crutcher mix.
Seventy-two grams (72 9.) of product were sewn into black fabric
pockets and agitated on delicate agitation at 60F (15.5C) in a
Kenmore~washer. Pockets were removed and cut at 3 minutes 5
10 minutes 7 minutes and l O minutes and graded on a 1-7 scale
where l is poorly dispersed with most of the product remaining
caked in the pocket and 7 is completely dispersed. Grades
reported are averages of two replicate tests.
Solubility grade at hlinutes
~ Poly- C23E6 . 5T
Product PEG acrylate Nonionic 3 5 7 10
A 0 0 0 1 2 6.5 7
20 B 0 1. 03 0 1 6 7 4
C0.69 1.03 0 1 6 7 7
D0.69 1.03 1.37 7 7 7 7
As can be seen the products containing all three ingre-
dients (PEG polyacrylate and nonionic surfactant) of the inven-
25 tion have the most improved cold water dispersion.
Sorry, the representative drawing for patent document number 1293421 was not found.
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|Forecasted Issue Date||1991-12-24|
There is no abandonment history.
|Current Owners on Record|
|THE PROCTER & GAMBLE COMPANY|
|Past Owners on Record|
|CUSHMAN, MARK EDWARD|