Note: Descriptions are shown in the official language in which they were submitted.
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Soaker Compositions
s
Technical Field
20 The present invention relates to the cleaning of fabrics in soaking conditions,
i.e. in conditions where the fabrics are left to soak in a soaking liquor
comprising water and detergent ingredients, either as a first step before a
typical washing operation, or as a single step.
Backqround
Fabric soahi,-g operaliG"s have been des~ibed in the art. In such soaking
30 o~r~lions, fabrics are left in co,)tact with a soaking liquor for a prolongedperiod of time ranging from a few hours to overnight. This laundering process
has the advantage that it maximizes the conlacl time between the fabrics and
the key active ingredients of the soaking liquor. It also has the advantage thatit re~ ces or eliminates the need for a typical laundering operation involving
3s the need for mechanical agitation, or that it improves the efficiency of the
s~ ~hsequent typical laundering operation.
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Such soaking operations are typically efficient to remove tough outdoor dirt
from r~brics, such as particulate soil, mud, silt and clays. Such dirt is
particularly difficult to remove from fabrics. Indeed, it is believed that the very
flne dirt grains like silt, typicaliy in the range between 0.002 and 0.050 mm, and
5 clay, typically below 0.002mm in size, can insert among fabric fibers and
steadily stick to the surface of the fibers. This problem is particularly acute
with socks which are most ~xrosed to silt and clay pick-up.
It is thus an object of the pres~nl invention to improve the removal of dirt,
0 particularly silt and clay, from fabric in a soaking o~ eration.
It has been found that this object can be met by soaking fabrics in an ~qlleons
soaking liquor comprising a soaking detergent composition, said composition
co,nprising a so,l,ilan ester as defined hereinaffer in combination with high
levels of a building and soil suspending system. The present invention
~ncGmr~-sses the soaking detergent as well as a process of soaking fabrics in
a soaking liquor formed with said soaking deteryei)l.
Summar~ of the invention
In one ~ bGdi.ll~lll, the present invention encomp~sses compositions
COI"~. ising:
- a sGrbitan ester a~o,ding to the formula C6HgO2 (C2H40)X R1R2R3 wherein x
is an integer of from 0 to 40, R~, R2 are independently OH or (Cn H n.1)COO,
and R3 is (Cn H "t,)COO group, where n is an integer of from 11 to 17; and
30 - from 5% to 50% by weight of a building and soil suspending system
cor"prisi"g a cc"~,pound selected from citric acid or citrates, silicates,
~eolit~s, polycal ~,oxylates, pl~os,~l ,ales, and mixtures thereof.
In another e"lL,G.liment, the present invention el)cor,~ sses a process of
35 soaking faL" ics, wherein said fabrics are immersed in a soaking liquor
~,--~,-ising water and an effective amount of the composition above.
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Detailed Desc, i~lion of the invention
The present invention encompasses a composition and a process of soaking
5 fabrics. The co""~osition hereinafter referred to as the soaking composition is
used in the soaking process.
A - The comPosition:
In its first embodiment the present invention encompasses a composition
vwhich comprises a sorbitan ester, and a high level of a building and soil
suspending system.
15 The sG,bila" ester:
Accordi,,yly~ the first essential ingredient is a sorbitan ester accordi.,~a to the
formula C6HgO2 (C2H4O)X R~R2R3 wherein x is an integer of from 0 to 40 R~, R2
are independently OH or (Cn H nl~)COO and R3 is (Cn H nl,)COO group where
20 n is an integer of from 11 to 17.
In the ~rt:rt:r.ed coi."~osi(ions herein x is 0 or 20 and the most preferred
posil;GI ,s herein comprise polyethoxylated (20) sorbitan ll iatea-dle i.e.
C6HgO2 (C2H4O)20 (C~7 H 35C O O)3, or polyethoxylated (20) sorbitan
2s .. ,G.,Gslearale i.e. C6HgO2 (C2H4O)20(OH)2(C" H 35C O O), or sorL.ilan
.-.onGalearale i.e. C6Hg02(0H)2(C1~ H 35C O O), or sGrbilan ..,o"opaln,ilale i.e.
C6HgO2(OH)2(C15 H 3,C O O), or mixtures thereof.
All these malerials are co",mercially available under several trade names30 sud~ as Glycosperae TS 20 from Lonza (polyethoxylated sorbitan tristearate)
Glycosperse S 20 from Lonza (polyethoxylated sorbitan monoslea. dle)
R~di~sllrf 7145 from Fina (so.bilan monostearate) R~di~s~rf 7135 from Fina
(sorbitan "~o"opalmitate) Armotan MP from Akzo (sorbitan "~G"opalmitate).
3s It has further been found that combining ethoxylated sorbitan esters with non-
ethoxylated sGIl ildl- esters provides better ~,e,rG,--,d,)ce than either kind alone.
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In the soaking co"",osilion herein, there should be from 0.01% to 10% of said
sorbitan ester, ~,refe, dbly from 0.01% to 5%, most preferdbly from 0.5% to 5%.
s The buildinq and soil susPendinq svstem:
The second essential ingredient herein is a building and soil suspending
system comprising a compound selecteli from citric acid or citrates, silicates,
zeolites, polycarboxylates, phospl ,ales, and mixtures thereof. It is also
10 esse. ,lial that said system be present at a high total amount, of from 5% to 50%
by weight of the total composition, preferably from 10% to 40%, most
pref~rably from 15% to 30%.
Citric adid can be used in its acidic form or in the form of its salts (mono-, di-,
tri- salts) and in all its anhydrous and hydrated forms, or mixtures thereof.
Suitable silicates for use herein include alkali metal salts of silicate, or mixtures
ll,ereof. ~lerer-ed alkali metal salt of silic~te to be used herein is sodium
silicate. In addition to the pe-rormar,ce benefit mentioned in the background
20 part of this appli~lion, It has been found that the decomposition of available
oxygen produced in the soaking liquors upon dissol~ltion of soaking
compositions is re~ ced by the presence of at least 40 parts per million of
sodium sili~te in said soaking liquors.
25 Any type of alkali metal salt of silicAte can be used herein, including the
crystalline forms as well as the amGr~Jhous forms of said alkali metal salt of
sili~te or mixtures thereof.
Suitable cr~lalline forms of sodium siliç~te to be used are the crystalline
30 layered sili~les of the granular formula
NaMSix02x~1 ~YH20
wherein M is sodium or hydloge", x is a number from 1.9 to 4 and y is a
35 number from 0 to 20, or mixtures thereof. Crystalline layered sodium silicates
of this typ~ are disclose~ in EP-A-164 514 and methods for their prel~d,alion
are ~:scl~sed in DE-A-34 17 649 and DE-A-37 42 043. For the purposes of the
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present invention, x in the general formula above has a value of 2, 3 or 4 and
is preferably 2. More preferably M is sodium and y is O and prefer, ed
examples of this formula comprise the a, b, g and d forms of Na2Si20s
These materials are available from Hoechst AG FRG as respectively NaSKS-5,
s NaSKS-7, NaSKS-11 and NaSKS-6. The most prererl ed material is d
Na2Si20s NaSKS-6. Crystalline layered sili~tes are incorporated in granular
soaking compositions herein, either as dry mixed solids, or as solid
co,.,pG,)ents of agglo"~erates with other components.
0 S!~itAhls a",ol~l,ous forms of sodium silicate to be used herein have the
following general formula:
NaMSixo2x+1
wherein M is sodium or hydrogen and x is a number from 1.9 to 4, or mixtures
thereof. P,efer,ed to be used herein are the amorphous forms of Si20s Na20.
S! lit~hle Zeolites for use herein are aluminosilicates including those having the
empirical formula:
Mz(zAI02.ySiO2)
wherein M is sodium, poPssi~rn, a~mGI~ium or substituted ammonium, z is
from about 0.5 to about 2; and y is 1; this material having a magnesium ion
25 ex~ .ange capacity of at least about 50 milligram equiva!ents of CaC03
hard~,ess per gram of anhydrous aluminosilicate. F'lefe,.ed zeolites which
have the formula:
Nazi(AI02)z (SiO2)yù.xH20
wherein z and y are integers of at least 6, the molar ratio of z to y is in the
, range from 1.0 to about 0.5, and x is an integer from about 15 to about 264.
Useful materials are commercially available. These aluminosilicates can be
3s crystalline or a. . .or,ul ,ous in structure and can be naturally-occurring
aluminosilicates or synthetically derived. A method for producing
ah..";l,osilicate ion exel.di,~e materials is dis~losed in U.S. Patent 3,985,669,
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Krummel, et al, issued October 12, 1976. Preferred synthetic crystalline
aluminosilicate ion exchange materials useful herein are available under the
designations Zeolite A, ~eolite P (B), and Zeolite X. In an especi~lly preferrede,nbodi~-,ent, the crystalline aluminosilicate ion exchange material has the
formula:
r
Na12i(AI02)12(SiO2)12ù.xH20
wherein x is from 20 to 30, especially about 27. This material is known as
0 Zeolite A. P~erer~l,ly, the aluminosilicate has a particle size of about 0.1-10
microns in diameter.
Suitable phos~,l)ale builders for use herein include sodium and potassium
tripolyphosphate, pyrophosphate, polymeric metaphos~l,ale having a degree
s of pol~",eri~alion of from about 6 to 21, and G,ll,ol,l,osphate. Other
PhOSPhGrlJS builder compounds are disclosed in U.S. Pat. Nos. 3,159,581;
3,213,030; 3,422,021; 3,422,137; 3,400,176 and 3,400,148, incorporated
herein by reference.
Suitable poly~. L,oxylate builders for use herein include ether
polycarboxylates, including oxy~isuct;,)ale, as disclosed in Berg, U.S. Patent
3,128,287, issued April 7, 1964, and La",ba,li et al, U.S. Patent 3,635,830,
issued January 18, 1972. See also '~MS/TDS" builders of U.S. Patent
4,663,071, issued to Bush et al, on May 5, 1987. Suitable ether
polyc~, L,oxylates also include cyclic compounds, particularly alicyclic
cG""~ounds, such as those described in U.S. Patents 3,923,679; 3,835,163;
4,120,874 and 4,102,903.
Other useful Jeters,e,-~;~ builders include the ether hydroxypolycarboxylates,
1,3,5-trihydroxy be. ,~"e-2,4,6-trisulpl ,onic acid, and
ca, L~oxymethyloxysuccinic acid, the various alkali metal, al . ,- - ,o"ium and
sl~hstitlJte~i a....nonium salts of polyacetic acids such as ethylenediamine
tetraacetic acid and nitrilotriacetic acid, as well as polycarboxylates such as
mellitic acid, succinic acid, oxy~iisuccinic acid, polymaleic acid, benzene 1,3,5-
35 l- ica. boxylic acid, carboxymethyloxysuccinic acid, and soluble salts thereof.
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Also s~it~hl~ in the delerye"l compositions of the present invention are the
3,3~ica,L,oxy~-oxa-1,6-hexane~ tes and the related com~uounds disclosed
in U.S. Patent 4,566,984, Bush, issued January 28, 1986. Useful succinic acid
builders include the Cs-C20 alkyl and alkenyl succinic acids and salts thereof.
s A particularly preferred compound of this type is dodec~nylsuccinic acid.
Specific examples of succindle builders include: laurylsuccinate,
myristylsucc;nale, palmitylsuccinate, 2~o~ecsnylsuccinale (preferred), 2-
~"ladecenylsucc;nale, and the like. Laurylsuccinates are the prefer, ed
builders of this group, and are desc~ ed in EIJI upe~n Patent Application
0 8~ ;90.5/0,200,263, published November5, 1986.
Other suitable polycarboxylates are disclosed in U.S. Patent 4,144,226,
Crutchfield et al, issued March 13, 1979 and in U.S. Patent 3,308,067, Diehl,
issued March 7, 1967. See also Diehl U.S. Patent 3,723,322.
1s
Other suitable polycarboxylate buiders for use herein include builders
according to formula I
_ _
R1 yp (_CH2 - CR3_) R2
I
CO2M n
wherein Y is a co",ono",er or comonomer mixture; R1 and R2 are bleach- and
alkali-stable polymer-end groups; R3 is H, OH or C1~ alkyl; M is H, alkali
metal, alkaline earth metal, a",."onium or substituted ar"mG"ium; p is from 0 to30 2; and n is at least 10, or mixtures ll ,ereof.
rl~fe-led polymers for use herein fall into two ~egcjries. The first category
belonys to the class of copolymeric polymers which are formed from an
unsaturated polycarboxylic acid such as maleic acid, citraconic acid, itaconic~5 acid, mes~c41.ic acid and salts thereof as first ",oi,o",er, and an unsaturatedocdlboxylic acid such as acrylic acid or an alpha -C14 alkyl acrylic acid as
second ",o.,c"l,er. Rere"i"y to formula I hereinabove, the polymers belonging
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to said first class are those where p is not 0 and Y is selected from the acids
listed hereinabove. r,eferl-3d polymers of this class are those according to
formula I hereinabove where Y is maleic acid. Also in a prefe" ed
embodiment R3 and M are H and n is such that the polymers have a
molecular weight of from 1000 to 400 000 atomic mass units.
.
The second ~tegory of ~"erer, ~ad polymers for use herein belongs to the class
of polymers in which re~erling to formula I hereinabove p is 0 and R3 is H or
C14 alkyl. In a ~rer~rled embodiment n is such that the polymers have a
10 ",~ weight of from 1000-to 400 000 atomic mass units. In a highly
prere"ed embodir"e"l R3 and M are H.
The alkali-stable polymer end groups R1 and R2 in formula I hereinabove
suitably include alkyl groups oxyalkyl groups and alkyl carboxylic acid groups
and salts and esters thereof.
In the above, n the deg,~e of poly",eri~dlion of the polymer can be deter",ined
from the weight average polymer molecular weight by dividing the latter by the
average rllOnOIller molecular weight. Thus for a maleic-acrylic copolymer
20 having a weight average molea~l~r weight of 15 500 and comprising 30 mole
% of maleic acid derived units n is 182 (i.e. 15,500 / (116 x 0.3 + 72 x 0.7)).
Temperature-controlled columns at 40~C agai"sl sodium polystyrene
SUI~)I IOI ,ale polymer sla"dards available from Polymer LaL oraLories Ltd.
25 Sl ,rc,pshire UK the polymer SLdl ,dards being 0.1 5M sodium dih~,drogen
~hos~l,dle and 0.02M tet,d",etl,~l a"""onium hydloxide at pH 7.0 in 80/20
water/ac~tG, ~ill ile.
Of all the above highly pre~er,ed polymers for use herein are those of the first30 ~ ol~ in which n averages from 100 to 800 pre~erably from 120 to 400.
rlerelled builder and soil suspending system foruse herein is anhydrous citric
acid or polymers of maleic or acrylic acid or copolymers of maleic and acrylic
acid.
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ODtionals:
The soaking composition of the present invention may further coio~,ise a
variety of other ingredients.
~, S
As an optimal but highly preferred ingredient, the composition may further
comprise an oxygen bleach. Indeed, oxygen bleaches provide a multitude of
beneril:, such as bleaching of stains, deodori,dlion, as well as disinfectancy,
and the sorbitan esters according to the present invention have a further
10 particular advantage that they are resisla"t to oxydation by oxygen bleaches.The oxygen bleach in the composition may come from a variety of sources
such as hyd~ogen peroxide or any of the addition compounds of hydrogen
peroxide, or organic peroxyacid, or mixtures thereof. By addition compounds
of hyd~ogen peroxide it is meant compounds which are formed by the addition
of hydrogen peroxicle to a second chemical cci"pound, which may be for
exa"~ple an inoryanic salt, urea or organic carboxylate, to provide the additionco""~ound. Examples of the addition compounds of hydrogen peroxide include
i, .Gryal .ic perhydrate salts, the compounds hydrogen peroxide forms with
oryani~ ca,boxylates, urea, and compounds in which hydrogen peroxide is
20 cldll .raled.
Other s~it~hle oxygen bleaches include persulphates, particularly potassium
persulphate K2S2Og and sodium persulphate Na2S2Og. Examples of
inorga,)ic perhydrate salts include perborate, percarbonate, perphosphate and
2s persili~te salts. The inoryd"ic perhydrate salts are normally the alkali metal
salts.
The alkali metal salt of percd,Lonate, perborate or mixtures thereof, are the
pr~f~ d inorgai,ic perhydrate salts for use herein. P~erer,ed alkali metal salt
30 of pe~cd,bonate is sodium percd,bonate.
Soaking composilio,-s in the present invention may comprise from 0% to 60%
by weight of composition of a hydrogen peroxyde source, preferably from 0% to
40% and more ~crererdbly from 10% to 40%.
When the soaking coillposiliGi .s herein comprise an oxygen bleach, it is
p(efe-, ~d for them to further cc . . I~Ji ise bleach activators. Examples of suitable
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cG",pounds of this type are disclose~i in British Patent GB 1 586 769 and GB 2
~ 143 231. rl efer, ~d examples of such compounds are tet~ acetyl ethylene
diamine, (TAED), sodium 3, 5, 5 trimethyl hexanoyloxybenzene sulphonate,
diperoxy dode~noic acid as described for instance in US 4 818 425 and
nonylamide of peroxyadipic acid as described for inslance in US 4 259 201 and
n-nonanoyloxybe"~e"esulphonate (NOBS), and acetyl triethyl citrate (ATC)
such as clesa it,ed in European patent application 91870207.7. Also
particularly ,~refel, ~d are N-acyl caprolactam selected from the group
0 consisting of substituted or unsubstituted benzoyl caprolactam, octanyl
caprolactam, nonanoyl caprolactam, hexanoyl caprolactam, decanoyl
caprolactam, undecenoyl caprolactam, formyl caprolactam, acetyl caprolactam,
propanoyl caprolactam, butanoyl caprolactam ,.,entanoyl caprolactam. The
soaking cc,r"posilions herein may comprise mixtures of said bleach activators.
1s
r, ~r~" ~ mixtures of bleach activators herein comprise n-
non- -. ,oyloxyL,e"~enesl~lpl ,o"ate (NOBS) togell ,er with a second bleach
activator having a low tendency to generate diacyl peroxide, but which delivers
mainly peracid. Said second bleach activators may include tetracetyl ethylene
diamine (TAED), acetyl triethyl citrate (ATC), acetyl caprolactam, benzoyl
caprolactam and the like, or mixtures thereof. Said mixtures of bleach
activators are ,c,rererably used in the e",bodi",ent of the present invention
where the soaking liquors are controlled to a pH below 9.5. Indeed, it has
been found that mixtures of bleach activators comprising n-
2s no,-a,.oyloxyL,en~enesulphGnale and said second bleach activators, allow toboost partiu~~'e soil cleaning ~e~ro~ ance while exhibiting at the same time
good pelrc,l",a"ce on diacyl peroxide sel,silive soil (e.g. beta~arule,)e) and on
perd~d sel.sili-/e soil (e.g. body soils).
Accordingly, the soaki--g col"posilions herein may comprise from 0% to 15%
by weight of the total composition of n-nonanoyloxybenzenesu;phondle,
~,r~feral;,ly from 1 % to 10% and more preferably from 3% to 7% and from 0% to
15% by weight of the total composition of said second bleach activator
preferably from 1 % to 10% and more ~,referably from 3% to 7%.
When the soaking cG""~osilions herein cGl"~Jrise an oxygen bleach, it may be
desi(aL.le for them to further comprise chelating agents which help to control
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11
the level of free heavy metal ions in the soaking liquors, thus avoiding rapid
decornposition of the oxygen released by said source of available oxygen.
Suitable amino carboxylate chelating agents which may be used herein include
diethylene triamino pentacetic acid, ethylenediamine tetraacetates (EDTA), N-
5 hydroxyethylethylenediamine tri~oePtes, nitrilotriAcet~tes, ethylenediaminetel,dprc",rionates, triethylenetetraamine hPY~cePtes, and ethanoldiglycines,
alkali metal ammonium and substituted am",Gi,ium salts thereof or mixtures
thereof. Further s~ ~it~hle chelating agents include ethylenediamine-N,N'-
~is~ inic acids (EDDS) or alkali metal, alkaline earth metal, cir"r"Gnium, or
10 substituted a"",IG". ~m salts thereof. Particularly suitable EDDS co",pounds
are the free acid form and the sodium or magnesium salt or complex thereof.
Also others suitable chelating agents may be the organic phosphonates,
including amino alkylene poly(alkylene phosphonate), alkali metal ethane 1-
hydroxy dipl,ospl,Gi,ates, nitrilo trimethylene phosphonates, ethylene diamine
tetra methylene phosphonates and diethylene triamine penta methylene
~I,os~,honates. The phosphonate compounds may be present either in their
acid form or in the form of their metal alkali salt. Preferably the organic
pl,ospl,onate co""~ounds where present are in the form of their magnesium
salt.
The soaking compositions in the present invention may accordingly comprise
from 0% to 5% by weight of the total compositions of said chelating agents,
~,, efer;ably from 0% to 3%, more preferably from 0.05% to 2%.
Soaking compositions in the present invention may further comprise other
optio"al ingredients such as surfactants, fillers, optical bri~l,leners, enzymes,
other chelants, disper:,anls, surfactants, soil release agents, photoa~ ated
bleaches such as Zn phthalocyanine sulphonate, dyes, dye l,ansrer inhibitors,
30 pi~,".,ents and perfumes. Said optional ingredients can be added in varying
amounts as clesired.
The cc~ JosiliG,)s herein can be manufactured in solid, preferably granular, or
35 liquid form.
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12
B - The Process:
In a secon~ eml~o~ e~t, the present invention encomp~sses a process of
soaking fabrics. As used herein, the expression "process of soaking fabrics"
refers to the action of leaving fabrics to soak in a soaking liquor comprising
water and a cGr, ~position as clesc, ibed hereinabove, for a period of time
suf~lcient to clean said fabrics. The soaking process can be performed
independently from any other process, such as a typical laundering operation,
or a first step before a second, typical laundering step. In the pre:rar,~d
0 scakir,g pro~sses of the invention, fabrics are left to soak for a period of time
ranging from 10 minutes to 24 hours, preferably from 30 min to 24 hours, most
prererdbly 4 hours to 24 hours After the fabrics have been immersed in said
so3kill9 liquor for a sufficient period of time, they can be removed and rinsed
with water. The fabrics can also be washed in a normal laundering operation
after they have been soaked, with or without having been rinsed inbetween the
soaking operalion and the s~ ~hsequent laundering operation.
In the soaking process herein, a soaking composition desc, ibed hereinabove is
diluted in an a~,rc",riate amount of water to produce a soaking liquor. Suitabledoses may range from 45 to 50 grams of soaking co",positoin in 3.5 to 5 liters
of water, down to 90 to 100 grams of soakiny composition in 20 to 45 liters of
water. Typically one dose is 45-50 grams in 3.5 to 5 Lt for a conce. Ilr;3ted soak
(buckeVsink). For washing ..,acl,i..e soaked, the dose is 90-100 grams in
about 20 (Europe) to 45 (US) liter of water. The fabrics to be soaked are then
25 i."",e(~ed in the soaking liquor for an appro,uliale period of time. There are
fa~to,~ which may influence overall pelrur--,ance of the process on particulate
dirVsoils. Such factu.:, include p,olonyed soaking time. Indeed, the longer
fabrics are soaked, the better the end results. Ideally soaking time is
ovemight, i.e. 12 hours up to ~4 hours. Another factor is the initial warm or
30 warmluke temperature. Indeed higher initial temperatures of the soaking
liquors ensure large benefits in performance.
The process herein is suitable for cleaning a variety of fabrics, but finds a
fel,ed application in the soaking of socks, which are particularly exposed to
35 silt and clay pick-up.
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13
ExamPles
The following compositions are prepar~d by mixing the listed ingredients in the
listed proportions.
Inqredient 1 2 3
(% wlw) (% wlw) (% wlw)
Sorbitan mono-stearate (SMS) -- 3.00
Sorbitan tristearate EO 20 (STS EO 20)-- -- 3.00
Citric acid 12 12 12
ZeoliteA . 11 11 11
Polyacrylate (Acusol 445ND) 11 11 11
Silicate (am~r,ul,ous; 1.6 r) 0.3 0.3 0.3
Sodium perLorale monohydrate 26 26 26
Sodium percarbG"ate O O 0
Sodium carbonate 4 4 4
Sodium sulphate 10 10 10
NOBS 12 12 12
Anionic (LAS/AS/AES) 7 7 7
Other, inerts and minors up to up to up to
100 100 100
In~redient 4 5 6
(% wlw) (% wlw) (% wlw)
Sorbitan mono-stearate (SMS) 2.50 0 0
Sorbitan monostearate EO 20 (SMS EO 20) 0 3.00 0
Sorbitan trislearate EO 20 (STS EO 20)0.50 0 3.00
Citric acid 10 10 10
Zeolite A 0 0 0
Polyaylate (Acusol 445 ND) 11 11 11
SilicAt~ (a~ hous; 1.6r) 0.4 0.4 0.4
Sodium pe,L,orale ,.. onol)ydrate 0 0 O
Sodium pe~ca.L,G.. ate 31 31 31
Sodium sulphate 24 24 24
NOBS 6 6 6
TAED 5 5 5
Anionic (LAS/ASIAES) 7 7 7
.,
Others, inerts and minors up to up to up to
100 100 100
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14
Soaking liquors are formed by diluting each time 45 9 of said compositions in
between 3.5 lit. to 5.0 lit. of water. 0.5 to 2 Kg of fabrics are then each timei""~er~ecl in said soaki"9 liquor for a time ranging from 10 minutes to 24 hours.
Finally, the fabrics are removed from the soaking liquors, rinsed with water andwashed with a regular washing process, handwash or washing machine wash,
with a regular deterg~nl, with or without re-using the soaking liquor, then saidfabrics are left to dry.
