Note: Descriptions are shown in the official language in which they were submitted.
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DETERGENT COMPOSITION BASED ON ZEOLITE-BICARBONATE BUILDER MIXTURE '
The present invention relates to a detergent composition comprising both zeolite as a
seque~tering agent for water hardness and bicarbonate builder.
<
Detergent compositions for fabric washing conventionally contain detergency
builders which lower the concellL~alion of c~ m and m~gnPci.lm water hardness
ions in the wash liquor and thereby provide good detergency effect in both hard and
soft water.
Conventionah r~ i"organic phosphates, such as sodium tripolyphosphate, have beenused as builder3 for laundry detergents. More recently, aLkali metal ~lllminosilicate
iori--e:~h~rlgers, particularly crystalline sodium ~lllminosi~ te zeolite A, have been
proposed as repl~-Pm~ntc for the il-OI ~ iC phosph:~tPC
For cA~Iple, EP 21 491A (Procter & Gamble) ~ sps d.,t~,.g,t..l compositions
co..~ a building system which in~l~ldes zeolite A, X or P (B) or a mixture
thereof. EP 384070A (IJnilever) discloses specific zeolite P materials having anespecially low silicon to ~1~...;.,;.,~., ratio not greater than 1.33 (ht.t;illaller lere--
~to as zeolite MAP) and des~;. ~es its use as a det~ ,n~iy builder.
Zeolite builders are typically used in detergent compositions with cobuilders toprovide o~,ti,.,u-~ building capacity for the detergent composition as a whole.
Ca l,onale is a particularly commonly used cob--ildPr, which is favoured in part, for
its ability to provide both building capacity and ~ inity to a wash solution.
The Applicants have now surprisingly found that a p.o~' may occur when a water
insoluble zeolite having a small particle size, is used as a dcte-~.,ncy builder in a
fabric laundering detergent composition also co..~ p. relatively high levels of
c~hl,olla~e cobuilder. The problem has been found to be particularly pronounced
when the zeolite builder is zeolite MAP.
The choice of a small particle size for a zeolite MAP co,--polle--l, that is to say
particles having a particle size, measured as a dso value, of up to 1.0 micrometres
has previously been taught to be ple~-.~,d in the art, as rep,~ 1, for example, by
EP 384070 A.
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The problem relates to the aforemçntit)ned detergent compositions having a marked
incompatibility with printed cotton fabrics. In particular, it has been found that the
use of detergent compositions co~ g smaU particle size zeolite tends to lead to
the removal of printed pigment from a printed cotton fabric surface. The presence of
relatively high levels of carbonate cobuilder has been found to eA~I ~ebale this effect.
The Applicant has surprisingly found that this p~c,bl~l.l can be ameliorated by the
partial or complete repl~cPmPnt of the c~l,onale component of the detergent
composition by a bicarbonate builder co...ponent.
The present invention is thus based on the u~l~,A~c~,led finding that the printed cotton
fabric care profile of a detergent composition co-lll,-isiilg zeolite of small particle
size, bic~l,ona~e builder and relatively low levels of carbonate builder is superior to
that of cO---~l&-ably aL~caline and built compositions co~ g p.i.~ipally carbonate
cobuilder.
This finding allows the fonnulation of dt;l~ ~,e"l compositions providing both
eYcPIIPnt rle~ning and printed fabric care plope.lies on cotton fabrics.
Whilst the prior art, as lep-~nled for ~ -~-..ple by European Patent Aplications, EP
384070 A, EP 448297 A, EP 522726 A, EP 533392 A, EP 544492 A, EP 552053
A, and EP 552054 A has envisaged the use of cobuilders in conlbinal~on with zeolite
in laundry d~ ,c;..l compositions, none of these prior art doc~mPn~ specificallydisclose the use of bicall~onale cobuilder with a small particle size zeolite
component. Fu~lL_.mor~" none of these prior art doc~ i provides any te~ching
relating to the printed cotton fabric care pr~bl addressed by the current invention,
nor of any solution thereto involving the selection of a particular bicarbonate
cobuilder co-l,pone.ll.
Thus, the present i~e.llion provides a dele.~,t;..l composition co.,~ ;n~
(a) a zeolite builder having a particle size, dso, of less than 1.0
rnicrometres;
~b) a bicalboilale builder; and optionally
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(c) a carbonate builder
wherein the weight ratio any carbonate builder to the bic~l,ona~e builder is less than
4:1.
In a p,t;re-lled embodiment of the invention the zeolite builder comprises zeolite P
having a silcon to ~ minillm ratio of not greater than 1.33 (zeolite MAP).
In a further plt;rellc;d embodiment the detergent composition according to the
invention is form--l~ted to be espeçi~lly useful in the laundering of coloured fabrics
and p,~,rel~bly is free of bleach. Accol~ g to another aspect of the invention, the
composition is subs~ ially free of an optical brightf n~r.
Zeolite builder
The first P ss~ l co",pon~ of the present invention is an alllmino.cili~te zeolite
builder.
The zeolite builder is typically present at a level of from 1% to 80%, more plt;Çel~bly
from 15% to 40% by weight ofthe cc"~.po~;~;ons
Suitable ~hlminosilis~te zeolites have the unit cell formula Naz[(A102)z(SiO2)y].
XH2O wh~ z and y are at least 6; the molar ratio of z to y is from 1.0 to 0. 5 and
x is at least 5, pr~f~ bly from 7.5 to 276, more plerél~bly from 10 to 264. The
alllminosiliss~te m~trri~l are in hydrated form and are p,~f~ bly crystalline,
cc,..~ 5 from 10% to 28%, more prt;r~ bly from 18% to 22% water in bound
form.
The ~hlminocilir~qte zeolites can be naturally occurnng materials, but are preferably
synth~ti~lly derived. Synthetic crystalline ~lllminocili~te ion ~ .~hange materials are
available under the d~ci~. l;onc Zeolite A, Zeolite B, Zeolite P, Zeolite X Zeolite
MAP, Zeolite HS and ~-~lur,s thereo~
Zeolite A has the formula
Na 12 ~AlO2) 12 (SiO2)l2] xH2O
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wherein x is from 20 to 30, especially 27. Zeolite X has the formula Nag6
[(Alo2)86(sio2)lo6] 276 H20.
Zeo1ite MAP is described in EP 384070A (Unilever). It is defned as an alkali metal
mino-silicate of the zeolite P type having a silicon to ~ minillrn ratio not greater
than 1.33, preferably within the range from 0.9 to 1.33 and more preferably within
the range of from 0 9 to 1.2.
Of particular interest is zeolite MAP having a silicon to ~In.. : .. ratio not greater
than 1.15 and, more particularly, not greater than 1.07.
Zeolite P having a Si:AI ratio of 1.33 or less may be p~epalcd by the following steps:
(i) mixing together a sodium ~IIlmin~te having a mole ratio
Na2O:A12O3 within the range of from 1.4 to 2.0 and a sodium
silicate having a mole ratio SiO2:Na2O within the range of from 0.8 to
3 4 with vigorous stirring at a tc,~ re within the range of from
25~C to boiling point usually 95~C, to give a gel having the following
composition; A12O3: (1.75-3.5) SiO2: (2.3-7.5) Na2O :P (80-
450)H20;
(ii) ageing the gel composition for 0.5 to 10 hours, preferably 2 to Shours, at a tClll~ tUl~, within the range of from 70~C to boiling point,
usually to 95~C, with s~fficiPnt stirnng to ~"ai~ any solids present in
su;.~ n;
(iii) S~p~aling the crystalline sodium ~ minosilic~te thus formed,
washing to a pH within the range of from 10 to 12.5, and drying,
~f~,fe.ably at a tc~ ,.alure not ~ -~,ee~ g 150~C, to a moisture content
of not less than S wt.%.
Pleîcll~,d drying methods are spray-drying and fiash-drying. It ap~ that oven
drying at too high a t~ lpe.~ re may adversely affect the calcium binding capacity of
the product under certain c;l ~ S
CGIIUII~C;dI sodium metasilicate pentahydrate dissolved in water and collu"e.,ial
sodium silicate solution (waLel~lass) are both suitable silica sources for the
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production of zeolite P in accordance with the invention. The re~ct~ntc may be
added together in any order either rapidly or slowly. Rapid addition at ambient
temperature, and slow addition at elevated temperature (90-95~C) both give the
desired product.
Vigorous stirring of the gel during the ~d~liti~n of the re~cf~ntc and at least
moderate stirring during the subsequPnt ageing step, however, appear to be ~cct~nti:~l
for the forrnation of pure zeolite P. In the absence of stirring, various mixtures of
crystalline and amorphous materials may be obtained.
Zeolite MAP generally has a c~ m binding capacity of at least 150 mg CaO per g
of a~ ous ~ mint~silc~te, as measured by the standard method described in GB
1473201 (Henkel). The calcium binding capacity is normally 160 mg CaO/g and
may be as high 170 mg CaO/g.
.~lthough zeolite MAP like other zeolites co..~aills water of hydration, for thepurposes of the present invention amollntC and pc.c~ gçs of zeolite are cA~Jle i~d
in terms of the notional a~ dru-ls material.
The amount of water present in hydrated zeolite MAP at ~l)ienl telllp~ re and
humidity is generally about 20 wt.%.
The ~olite builder used in the present invention has a particle size dso of less than
1.0 mi~lull~ell~s~ pr~,ably from 0.05 to 0.9 miclo"~elles~ most preferably from 0.2
to 0.7 micrc~ ,L~.,s. The dso value i~ le9 that 50% by weight of the particles
have a ti;a~ t~ srnaller than that figure. The particle size may be determined by
conv~nfion~l analytical teçhnitlues such as, for example, microscopic del~,.llfinalion
ili7ing a S ;a ~ g el~, o- 11~ uscopC or by means of a laser granulometer.
Zeolite builder having the r~uired particle size acco.-li"g to the present invention
can, for ~ , 'e, be p.ep~ed by the conventional techn:ques as dese~ ed above
while adop~ g one or more of the following steps:-
a) de ~ lg cryst~ tion time;
b) decreasing the size of the seed crystals used to produce the zeolite;
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c) screening the zeolite product to remove coarse material.
An article by D. Vucelic, published in Progr Colloid Polymer Science, 1994, Volume
95, pages 14 - 38 desc,ibes methods for the synthesis of zeolite particles, and in
particular how to jnfl~lence the particle size characteristics of the zeolites by
modification of the synthesis process steps.
Brcarl~nate builder
In addition to zeolite, the dt:le.~ compositions contain bicarbonate builder. Bybicarbonate builder it is meant herein any compound capable of rçleAsing bicarbonate
ions to a wash solution.
Prère~llèd bicarbonate builders include the alkali and alkaline earth bicall,ona~e salts,
particularly sodium bic~hbonale.
The bica,l,onale builder is typically present at a level of from 0.5% to 60%,
~lert~ably from 2% to 40%, most pref~.ably from 3% to 20% by weight of the
detergent composition.
The bicarbonate builder is p~fc.ably present at a weight ratio of zeolite builder to
bi- l,onale builder of from 20:1 to 1:5, more ~ ,f~,.ably from 10:1 to 2:1, mostp. ~,re~ ably from 5 :1 to 1:1.
Other builders
The d.,le. ~ccnl co...pos;lions may contain other organic or inorganic builders.
In an f/~ ;AI aspect the level of any c~l,ohale builder, that is of inorganic
compound capable of rPlp~cing carbonate ions into a wash solution, is kept relatively
low. In particular, any carbonate builder is present only at a level wh~.ei-~ the weight
ratio of the carbonate builder to the b:~r bonale builder is less than 4:1, ~le~.ably
less than 2:1, more prere ably less than 1:1. Most pr~relably the de
composition is free from ca,l,Gnale builder.
Suitable organic cob~ rs can be ...ono~....ic or polymeric carboxylates such as
citrates or polymers of acrylic, methArrylic and/or maleic acids in neutralised form.
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Suitable inorganic cobuilders include carbonates and amorphous and crystalline
layered silicates.
Suitable crystalline layered eilic~tes have the composition:
NaMSix02x+l . yH20
where M is sodium or hydrogen, preferably sodium; x is a number from 1.9 to 4; and
y is a number from 0 to 20. Such materials are described in US Patents No.
4664839; No. 4728443 and No. 4820439 (Hoechst AG). F..epeçi~lly plèfclled are
compounds in which x = 2 and y = O. The synthetic material is co.lllllel.,;ally
availab1e from Hoechst AG as o -Na2 Si2Os (SKS6) and is de~l;bed in US Patent
No. 4664830.
The total amount of dGlel~ency builder in the granular composition typically ranges
from 10 to 80 wt.%, more plcfcl~Lbly from 15 to 60 wt% and most plefGIably from
10 to 45 wt.%.
-
Additional dc~ components
The detergent composition accordillg to the invention may contain other delecolllponel~ls such as surf~Gt~nte ble~h~c~ fluol~,scc.~, antiredeposition agents,
~llOI~alLC salts such as sodium sulphate, other el~llles, lather control agents, fabric
softening agents, pi~rn~nte, coloured speckles and perfumes.
Surfactant
The d~,t~e.ll composition according to the invention pl er~l ~bl" includes a
surfactant s~lect~i from anionics, nonionics, zwitterionics, ampholytics and
ç~ti~ ~ --s
The surfactant is p~Gfel~bly present in the detergent compositions at a level of from
1% to 50%, pl~f~,.ably from 3% to 30%, most preferably from 5% to 20% by weight
of the compositions.
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Many suitable detergent-active compounds are available and fully described in the
literature (for example "Surface Active Agents and Dt;~l2;ellls" Volumes I and II by
Scl-w~ 4 Perry and Berch).
Examples of suitable additional anionic surf~ctAntc include anionic sl-lf~tes, olefin
sulphonates, alkyl xylene sulphonates, diallcyl~lrhos Ic~ cs, and fatty acid ester
sulphonates. Sodium salts are generally plt;~..~d.
Anion~c suLfate .,ulr~;l~ll
Anionic sulfate surfactants suitable for use herein include the linear and branched
prirnary alkyl s-llf~tes, aL~cyl ethoxys-llf~t~e, fatty oleoyl glycerol sl-lf~tçe, alkyl phenol
ethylene oxide ether s~lf~tes~ the Cs-C17 acyl-N-(Cl-C4 alkyl) and -N-(Cl-C2
hydroxyalkyl) ~ c~mine slllf~tçe, and sulfates of aL~cylpolysaccharides such as the
suLfates of alkylpolyglucoside (the nonionic non~.llri.~ccl compounds being described
herein).
-Alkyl ethoxysulfate surf~t~nts are pl.,f~ bly s--lected from the group consisting of
the C6-C1g alkyl sulfates which have been ethoxylated with from 0.5 to 20 moles of
ethylene oxide per mole lle More plef~.~ly, the allcyl ~ilhu~y.,L~lfate surfactant is a
C6-Clg alkyl sulfate which has been ethoxylated with from 0.5 to 20, pltifel~blyfrom 0.5 to 5, moles of ethylene oxide per mole llç
Anionic sulfonate surfactant
Anionic sulfon~te s~rf~ct~nt!c suitable for use herein include the salts of Cs-C20
linear allylb~ e s~llron~ ,s, alkyl ester sl-lfon~t~e, C6-C22 pl~ll~y or second~uy
aLtcane sulrona~es, C6-C24 olefin sulfonates, s~llro~ eA polyc~l.u~ylic acids, aL~cyl
glycerol s ~lro~ c~ fatty acyl glycerol s~lr~n~t~s~ fatty oleyl glycerol sulronales, and
any mixtures thereo~
Nonionic surfactant
The n~niQnic sulr~ is pl~fe ~bly a Ly-ilophobic nonionic surfactant, particularly
an alkoxylated nonionic surfactant, having a h~drophilic lipophilic balance (hlb) value
of < 9.5, more ~,ert .~ly
< 10.5.
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Examples of suitable hydrophobic alkoxylated nonionic surf~ct~nts include
alkoxylated ~dd~lr,tC of fatty alcohols co..~ g an average of less than 5 alkylene
oxide groups per molecule.
The alkylene oxide residues may, for example, be ethylene oxide residues or
mixtures thereof with propylene oxide residues.
r~Çelled alkylene oxide ~dclt1ct~ of fatty alcohols useful in the present invention can
suitably be chosen from those of the general formula:
R-O~(CnH2nO)yH
whele.l~ R is an alkyl or alkenyl group having at least 10 carbon atoms, most
preferably from 10 to 22 carbon atoms, y is from 0.5 to 3.5 and n is 2 or 3.
Plerell~d nonionic surf~ct~nts include p---~ Cll-Cls ~liph~tic alcoholscon~nced with an average of no more than five ethylene oxide groups per mole of
alcohol, having an ethylene oxide content of less than 50% by weight, prerel~blyfrom 25% to less than 50% by weight.
A particularly pre~..ed ~liph~tic alcohol ethoxylated is a primary alcohol having an
average of 12 to 15 carbon atoms in the alkyl chain conden-ce~ with an average of
three ethoxy groups per mole of alcohol.
.~perifir, examples of suitable alkoxylated ~ductc of fatty alcohols are Synperonic
A3 (ex ICI), which is a C13-Cls alcohol with about three ethylene oxide groups per
mole ~le and F.mpil~n KB3 (ex Marchon), which is lauric alcohol 3EO.
Another class of nonjonic s~f~ntc CGIll~Jli~S alkyl polygluco~ e compounds of
general formula
RO(CnH2nO)tzx
wherein Z is a moiety derived from gl~r~se; R is a saturated l,~d,~,phobic alkylgroup that co..l; ;..~ from 12 to 18 carbon atoms; t is from 0 to 10 and n is 2 or 3; x
is from 1.1 to 4, the compounds in~ ing less than 10% unreacted fatty alcohol and
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less than 50% short chain allyl polyglucosides Compounds of this type and their
use in detergent compositions are disclosed in EP-B 0070074, 0070077, 0075996
and 00941 18
Bleach
Detergent compositions acco~ d.llg to the invention may also contain a bleach system
Where present, this preferably CO.Il~l ;SCS one or more peroxy bleach compounds, for
cA~Ill~le, h~or~g~.c persalts or organic pe~u~yacids, which may be employed in
conjunction with bleach precursors to improve bl~- chin~ action at low te.~l~,e.dl~lres
The bleach system p,~rw~bly comprises a peroxy bleach compound, preferably an
inorganic persalt, optionally in conjunction with a peroxyacid bleach precursor
Suitable persalts include sodium pclbGIaLe monohydrate and tetrahydrate and
sodium p~,..,&l,ona~e, with sodium pe.~l,onate being most prere-.~d.
~ Pl~:felr.,d bleach precursors are peracetic acid plecu-sors, such as tetraacety~lethylene
e (TAED); I:Je ~y~ ,OiC acid precursors
In one pref~ d aspect, the detergent col.lpo~;~ions are free of bleach and of
particular utility in the washing of loads CQ~ g brightly coloured fabrics
I,ow pH~lk~linity del~ al conlpos;lions
P~.f~.l~l d~l~,.~nl compositions accol~ g to the invention are .,h~ ised by
having a pH measured as a 1% solution of the detergent composition in ~ tilled
water at 25~C of C 10 5, plef~.ably < 10.4, most preferably ~10 3
It has ~een found that compositions having a low level of reserve ~ lini~y are
adv~nt~geol-~ in that they have a further reduced ten~lenCy to cause the removal of
printed p;g. .~ .l from printed cotton fabncs. Reserve ~ik~linity is ~"~pl.,sse;i as g of
NaOH per 100 g of composition as d~f ...i~f~ by acid titration of a sample, as 1%
solution in ~lictill~l water to a pH of 9 5 Pl.,fe.,~d values of reserve ~ inity are <
8 0 g p~erei~ably < 5 0 g, most pL~ ably < 3 0 g NaOH per 100g of composition
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1 1
Physical form
The detergent composition acco~-Lng to the invention may be of any physical type,
for example powders, liquids and gels. However, granular and liquid compositionsare p-crclled.
Making process
The dele~genl compositions of the invention may be pleparcd by any suitable
method. The particulate detergent compositions are suitably p.~l,ared by any tower
(spray-drying) or non-tower process.
In processes based around a spray-drying tower, a base powder is first p-~,p~hed by
spray-drying a slurry and then other co---ponenls lln.cllit~ble for processing via the
slurry can be sprayed on or ~1mixed (postdosed).
The zeolite builder is suitable for in~ n in the slurly, although it may be
~ advantageous for procçCcing reasons for part of the zeolite builder to be
incGl~o.aled post-tower. The crystalline layered silicate, where this is employed, is
also illco,~ ed via a non-tower process and is pl~,f~,.ably post<lose~
Alternatively, particulate detergent compositions in accordd~ce with the invention
may be pr ~ ,d by wholly non-tower processes such as granulation.
The ~..llar d~,tclg~,nt compositions of the invention may be pl~paled to any
suitable buL~c density. The compositions p-,f~ bly have a buL~c density of at least
400 gA prcrcl~bly at least 550 g/l, most pl~,r~,~ly at least 700 gA and, with
particular pr~f.,rence at least 800 gA.
The benefits of the present invention are particularly evident in powders of high bulk
density, for; l~ '-, of 700 gA or above. Such powders may be plel)~ed either by
post-tower ~ n.cifie~tion of spray-dried powder, or by wholly non-tower methods
such as dry mixing and gr~mll~fion; in both cases a high-speed mixer/granulator may
adv~nt~geously be used. E'locesses using high-speed mixer/granulators are
f~i.c~.ioseA, for; , '~, in EP340 013A, EP 367 339A, EP 390 251A and EP 420
317A (Unilever).
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12
The detergent composition of the invention may be form~ ted as a liquid detergent
composition which may be aqueous or anhydrous. The term "liquid" used herein
in~ es pasty viscous formulations such as gels. The liquid detergent compositiongenerally has a pH offrom 6.5 to 10.5.
The total amount of detergency builder in the liquid composition is p,efe.~bly from 5
to 70% ofthe total liquid composition.
Illustrative co...pos;l;- ns according to the present invention are presented in the
following Ex~mp'cs. In the dele. ~enl compocition~ the abbreviated component
identifi~tions have the following ...~ni
24AS : Sodium alkyl sulfate surfactant co
predollfi"al~lly C12 and C14 aLkyl chains
TAS : Sodium aL~yl sulfate :~u~ra~ co............ l;~i.. il~g
predol.~in~lly C16 - Clg alkyl chains derived from
tallow oil.
24AE3S : C12-C14 alkyl e~ y~LIlfate co~ an average of
three ethoxy groups per mole
35E3 : A C13 15 primary alcohol con~n-~ with an average
of 3 moles of ethylene oxide
25E3 : A C12-C15 pll~ y alcohol con~ n~ with an
average of 3 moles of ethylene oxide
C~l,on~.le : Anhydrous sodium carbonate
Bicaul,vnale : Anhydrous sodium bic~bonale
P~,.l,o,~le : Sodium p~.b~ale tetrahydrate
TAED : Tetraacetyl ethylene ~
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13
Silicate : Amorphous Sodium Silicate (SiO2:Na2O ratio
normally follows)
SKS6 : Crystalline layered silicate available from Hoechst AG
as SKS6 (tr~.~len~mP)
Zeolite MAP : Hydrated sodium ~ minosilicate zeolite MAP
having a silicon to ~lllminium ratio of 1.07 having a
particle size, CA~I ~;.sed as a dso value, of 0.7
mi~, ul"el. ~ s
ZeoliteA : Hydrated sodium ~lllminosilicate zeolite A having a
particle size, c ~ ssed as a dso value, of 0.6
mi.,lu",el,~,s
MA/AA : Copolymer of 1:4 maleic/acrylic acid, average
molecular weight about 80,000.
-
Alcalase : rro~eolytic enzyme sold under the tr~d~n~me Alcalase
by Novo Industries A/S (approx 1% enzyme activity
by weight)
BSA : Amylolytic enzyme sold under the tr~ n~me LE17 by
Novo T.~ c A/S (approx 1% enzyme activity)
F,Y~m~
The following granular laundry delel-~e.ll compositions were p,~,~,~ed (parts byweight) in acco. dauce with the invention.
A B C D E
24AS 7.6 6.5 4.8 6.8
TAS - - - - 8.6
24AE3S 2.4 - 1.2 1.7
25E3 3.26 - - - 6.3
35E3 - 5.0 5.0 5.0
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14
Zeolite MAP 20 0 25 0 25 0 - 16 0
Zeolite A - - - 25 0 15 0
SKS6 70 5.0 100
Carbonate 3 0 3 0
Bicarbonate 3 0 4.0 4 0 8 0 5 0
MA/AA 425 425 425 425 20
Perborate 160 160 160 160 200
TAED 5 0 5 0 5.0 5 0 6 7
Alcalase 0.2 0 5 0 3 0 2 0 1
BSA - - 0 1
Protease 0 04 0 08 - 0 05 0 05
Silicate (2 0 4 0 - - 4 0 3 0
ratio)
Water and micc~ neous (Tnclll-1ing suds sl.ppl~,ssor, sodium sulphate, perfume) to
balance
The detergent compositions accoldi.,~ to the invention, which co,..l"ise zeolitebuilder of larger particle size and bic~l,ol.~te builder optionally with relatively low
levels of c~bollale builder, show good results in stain removal and lower printed
cotton fabric damage as co---pa,t;d with a co---p~bly ~Ik~lin~ and built bicarbonate-
free composition comprising small particle size zeolite and p..n~ ,ally carbonate
builder
