Note: Descriptions are shown in the official language in which they were submitted.
~L~93~G;~7
- 1 - C 7089
DETERGENT COMPOSITION
TECHNICAL FIELD OF INVENTION
This invention relates to a detergent composition;
particularly it relate~ to a fabric washing detergent
composi~ion having improved colour-care properties.
When washing coloured fabrics, various factors can
contribute to a loss of colour brightness. Thus, the
redeposition of soil from the wash li~uor may result in
colour dulling.
Also, when wa~hing mixed coloured fabrics and mixed loads
of coloured and white fabrics, there i5 the risk of
dye-transfer through the wash liquo~ from one fabric to
another, which will result in bleeding of colours,
discolouration and/or s~aining of the fabrics. With the
fashion of moving towards more coloured clothing and
textile materials~ especially multi-coloureds, the pxoblem
of dye-trancfer in the wash has become more acute.
.
BACKGROUND AND PRIOR ART
VariouR proposals have been made in the art to resolve
this problemg but so far without much success.
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63`^~
- 2 - C 7089
For example, in GB-A- 1 368 400 (~rocter & Gamble),
dye-transfer-inhibiting compositions were proposed which
comprise a peroxygen bleach compound, e.g. an organic
peroxyacid, combined with rather complex aldehyde or
ketone compounds as bleach activators. These compositions
have several drawbacks in that not only do they use rather
expen~ive and complex chemical compounds~ but also in that
they are not very effective.
Other compositions having dry-transfer-inhibiting action
are also disclosed in EP-A- 0024367 ~Unllever~ and
EP-A-0024368 (Unilever) based on the activation of organic
peracids or organic peracid precursors with bromide ions.-
Still, the main drawback of these compo~itions is that
they too exert a rather strong direct fabric dye
bleaching, tending to cause fading of the coloured
fabrics.
EP-A- 0058444 (Unilever) describes washing compositions
comprising a bleach system consisting essentially of an
organic peracid or an organic peracid precursor in
conjunction with a water-soluble iodide salt. There are
some snags in the use of iodide catalyst, namely 1) the
risk of staining due to iodine formation and 2) the effect
of direct fabric dye bleachin~.
EP-A- 0143491 (Unilever) proposes the use of a copper
- catalyst together with a peracid compound as the bleach
system for reducing dye-transfer, and in GB Patent 1 450
234 (Kao Soap) there i9 disclosed a bleaching detergent
composition comprising sodium percarbonate together with
polyethyleneglycol or polyvinylpyrrolidone.
Apart from the above-mentioned drawbacks, the proposed
compositions of the art are deficient in one way or
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another and are thu~ far from ideal for being sat~factory
a~ hav~ng real colour-care properties.
Efficient washing of coloured and mixed coloured/white
fabrlcs requ~res more than cleaning alone; ~t should also
take good care of the colours in a way that
colour-bleeding due to dye transfer, grey~ng, dulling
and/or fading, as well as change~ in hue, are minimised
such that the original colours and brightness of the
fabric~ are preserved as much as possible.
It ~s therefore an object of the present ~nvention to
provide an effic~ent detergent composition which can be
used for washing of mixed coloured and mixed loads o
coloured and white fabric~, having improved colour-care
properties with only minlmal to sub~tantially nil
dye-transfer~ where~n the drawbacks of the art are
mitigated to a substantial degree.
DEFINITION OF THE INVENTIQN
According to this invention, a detergent composition
adapted for washing fabrics and having improved colour-
care properties is provided, comprising from 5 to 50~ by
weight of a detergent-active material comprising anionic
detergent-active materials which are water-soluble alkali
metal salts of organic sulphates and sulphonates, and
mixtures thereof with nonionic detergent-active materials
and from 5 to 80% by weight of a detergency builder
characterised in that it further includes from 0.3% to lS%
by weight of a polymer mixture comprising the following
polymeric materials ~a), (b) and (c):
(a) an alkali metal carboxymethylcelluloses
(b) a vinylpyrrolidone polymer having an average
r - ~; molecular weight within the range of about 5000 to
~ about 350,000;
,." 1,
i3~
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(c) a polycarbQxylate polymer selected from compounds
having the empirical formula:
r~ _ ~
Rl _ - Y - tX - CR3) _ _ R2
S
COOM
- _ n
wherPin X is 0 or CH~, Y is a co-monomer or mixture of
co-monomers; R and R are bleach-and alkali-sta~le
polymer-end groups: R is H, OH or Cl-C4 alkyl; M is H,
alkali metal, alkaline earth metal, ammonlum or other
water-soluble cation: p is from 0 to 2; and n is at lea~t
10; and mixtures therefore; at a mixing ra~lon of a) to b3
within the ranqe 1:2 to 2:1 and of b~ to c) within the
range o l:l to 1:4.
DESCRIPTION OF THE INVENTION
The individual components of the polymer additive system
are wall known in detergent technology and may have found
commercial exploitation. However, the specific
combination is especially beneficial in fabric-washing
detergent composition~ having improved colour-care
properties.
THE DETERGENT ACTIVE MATERIAL
The de~ergent composition of ~he invention contain at
least one detergent ac~ive material which may be anionic,
nonionic or catisnic in nature, but mixtures of anionic
and nonion:Lc materials are preferred.
The anionic detergen~-active material can be a soap or a
non-soap (~3ynthetic) anionic material. Anionic
detergent-~lctive materials are commercially available and
\
- 5 - C 7089
are fully described in the literature~ for example in
"Surface Active Agents and Detergents", Volumes I and II,
by Schwartz, Perry and Berch.
Synthetic anionic detergent--active materials useful in the
present invention are water--soluble alkal metal salts of
organic sulphates and sulphonate~ having alkyl radicals
containing from about 8 to about 22 carbon atoms, the term
alkyl being used to include the alkyl portion of higher
acyl radicals~ Examples of suitable synthetic anionic
detergent compounds are sodium and potassium alkyl
sulphates, esp~cially those obtained by sulphating higher
[C8-C18) alcohols produced for example from tallow or
coconut oil, sodium and potassium alkyl (Cg-C20) benzene
sulphonates, particularly sodium linear secondary alkyl
(C10-Cl5) benzene sulphonates; especlally those ethers of
the higher alcohols derived from tal~ow or coconut oil and
synthetic alcohols derived from petroleum; sodium coconut
oil fatty monoglyceride ~ulphates and sulphonates; sodium
and potassium salts of sulphuric acid esters of higher
~C8-Cl~) fatty alcohol-alkylene oxide, particularly
ethylene oxide, reaction products; the reaction products
of fatty acids such as coconut fatty acids esterified with
isethionic acid and neutralised with sodi~m hydroxide;
sodium and po~assium salts of fatty acid amides of methyl
taurin~; alkane monosulphonates such as those derived by
reacting alpha-olefins IC8-C20) with sodium bisulphite and
those derived from reacting paraffins with SO2 and C2 and
then hydrolysing wi~h a base to produce a random
sulphonate; water-soluble salt~ of dialkyl esters of
sulphosuccinic acid; and olefin sulphonates, which term i3
used to des~ribe the material made by reacting olefins,
particularly ClO-C20 alpha-olefins, with SO3 and then~
neutralising and hydrolysing the reaction product. The
preferred anionic detergent compounds are sodium (Cll-C15)
alkyl benzene sulphona~es and sodium (Cls-Cl~ alkyl
sulphates.
37
- 6 - C 7089
Mixtures of anionic compounds may also be used in the
detergent compositions.
Examples of suitable nonionic surfactants include:
s
1. The polyethylene oxide condansates of alkyl phenol,
e.g. the conden~ation product~ of alkyl phenols having an
al~yl group containing from li to 12 carbon atoms in either
a traight chain or branched chain configuration, with
ethylene oxide, the said ethylene oxide being present in
amounts equal to 3 to 30, preferably 5 to 14 moles of
ethylene oxide per mole of alkyl phenol. The alkyl
substituent in such compounds may be derived, for example,
from polymerised propylene, di-isobutylene, octena and
nonene. Other examples includa dodecylphenol condensed
with 3 moles of ethylene oxide per mole of phenol;
dinonylphenol condensed with 11 mole~ of ethylene oxide
per mole of phenol; nonylphenol and di~ooctylphenol
condensed with 13 moles of ethylene oxide.
2. The condens~tion product of primary or secondary
aliphatic alcohol~ having 8 to 24 carbon atoms, in either
straight chain or branched chain configuration, with from
2 to about 40 moles, preferably 2 to about 9 moles o~
ethylene oxide per mole of alcohol. Preferably, the
aliphatic alcohol comprises between 9 and 18 carbon atoms
and i~ ethoxylated with between 2 and 9, desirably between
3 and 8 moles of ethylene oxide per mole of aliphatic
alcohol. The preferred surfactants are prepared from
primary alcohols which are either linear (such as those
derived from natural fats or prepared by the Ziegler
process from ethylene, e g. such as the Lutensols,~
Dobanols*and Neodols~8which have about 25% 2-methyl
branching (Lutensol being a Trade Name of BASF, Dobanol
and Neodol being Trade Names of Shell), or Synperonics,
which are understood to have about 50% ~-methyl branching
~ G~f)~ f~ tt'R d eh~e~ff
3~7
.
- 7 - C 7089
~
(Synperonic is a Trade Name of I.C.I.) or the primary
alcohols having more than 50~ branched chain structure
sold under the Trade Name Lial~by Liquichimica. Specific
examples of nonionic surfactants falling within the scope
of the in~ention include Dobanol~ 5-4, Dobanol*45-7
Dobanol~45-9, Dobanol~91-2.5, Dobanol~91-3, Dobanol 91-4,
Dobanol~91-6, Dobanol 91-8, Dobanol~23-6.5, Synperonic 6,
Synperoni ~14, the condensation products of coconut
alcohol with an average of between 5 and 12 mole~ of
ethylene oxide per mole of alcohol, the coconut alkyl
portion having from 10 to 14 carbon atoms, and the
condensation products of tallow alcohol with an average of
between 7 and 12 moles of ethylene oxide per mole of
alcohol, the tallow portion compricing essentially between
16 and 22 carbon atoms. Secondzry linear alkyl
ethoxylates are also suitable in the present compositions,
especially those ethoxylates of the Tergitol series having
from about 9 to 15 carbon atoms in the alkyl group and up
to about 11, especially from about 3 to 9, ethoxy residues
per molecule.
The compounds formed by condensing ethylene oxide with a
hydrophobic base formed by the condensation of propylene
oxide with propylene glycol. The molecular ~eight of the
hydrophobic portion generally alls in the range of about
1500 to 1800. Such synethetic nonionic detergents are
available ~n the market under the Trade Name of
nPluronic", supplied by Wyandotte Chemical~ Corporation.
When the detergent-active material comprises a mixture of
anionic and nonionic materials, the preferred nonionic
material or mixtures thereof fox use in this invention
will have an HLB (hydrophilic-lipophilic balance) of not
more than 10.5, preferably in the range of from 6 to 10,
most preferably in the range of 8 to 9.5. As explained,
the compocition can contain one or a mixture of more than
~ o~e s trQ d e ~n a 1~ ~
- a - C 7089
one nonionic detergent-active materials. The mixture can
contain one or more nonionic materials having an HL~ of
more than 10.5, providing the average HLB of the mixture
of nonionic materials is not: more than 10.5. The HLB
scale is a known measure of hydrophilic-lipophilic balance
in any compound. It is fully defined in the literature,
for example in "Nonionic Surfactants", Volume I, edited by
M.J. Sc~ick. A method of determining the HLB of a mixture
of nonionic materials is also defined in this reference.
Preferred nonionic materials are the alkoxylate adduc~3 of
fatty compounds selected from fatty alcohols, fatty acids,
fatty esters, fatty amides and fatty amines. The fatty
compound contains at least 10 carbon atom~ and the
nonionic material contains an average of less than 8
alkylene oxide groups per molecule.
Alkylene oxide adducts of fatty alcohols useful in the
present invention, preferably have the general formula:
R10 - 0 - (CnH2nO)yH
wherein R10 is an alkyl or alkenyl group having at least
10 carbon atoms, most preferably from 10 to 22 carbon
atoms, y is preferably no~ more than 10, such as from 0.5
to about 3.5, and n is 2 or 3. Examples of such materials
include Synperonic~A3 (ex IoC~ which is a C13-C15
- alcohol with about three ethylene oxide groups per
molecule, and Empilan~ B3 (ex Marchon) which is lauric
alcohol 3EO.
Alkylene oxide addurts of fatty acids useful in the
present in~ention, preferably have the general formula:
R10 - C 0 (CnH2nO)yH,
~ ~nO?Le~ ~Lr~ na~
37
- 9 - C 7089
- ~wherein R10, n and y are as given above. Suitable
example~ include ESONAL~0334 (ex Diamond Shamrock), which
is a tallow fatty acid with about 2.4 ethylene oxide
group~ per molecule.
Alkylene oxide adducts of fatty ester~ useful in the
present i~vention include adducts of mono~, di- or tri-
esters of polyhydric alcohols containing 1 to 4 carbon
atoms; such a~ coconut or tallow oil (triglyceride) 3EO
(ex Stearine Dubois).
Alkylene oxide adducts of fatty amides useful in the
present invention preferably have the general formula:
Rl - C - N ~ ( n 2n0JxEI
(CnH2n~zH
wherein R10 is an alkyl or alkenyl group having at least
10 carbon atoms, most preferably from 10 to 22 carbon
atoms, n is 2 or 3 and x and z in total are not more than
4.0, preferably from about 0.5 ~o 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.
Alkylene oxide adducts of fatty amines useful in the
present invention preferably have the general formula:
Rl _ ~ ~ ( nH2n ) xH
~ ~CnH2n)zH
wherein R10 and n are as given aho~e, and x and z in total
are preferably not more than 4.0, most preferably from
about 0.5 to about 3.5. ExampleQ of such materials
~ d~ 7Lra~le ~
37
- - 10 - C 7089
include Ethomeen T12 (tallow amine 2EO, available from
AKZO), Optameet~PC5 ~coconut alkyl amine 5EO~ and Crodamet
1.02 (oleylamine 2EO, available from Croda Chemicals).
Cationic detergent-active materials suitable for use
herein include quaternary ammonium surfactant~ and
surfactant~ of a semi-polar nature, or example amine
oxides.
Amounts of amphoteric or zwitterionic detergent compound~
can also be used in the compo~ition of the invention, but
this is not normally de~ired owing to their rela~ively
high cost. If any amphoteric or zwitterionic detergent
compound~ are used, it is generally in small quantities
relative to the much more commonly used a~ionic and/or
nonionic detergent active compounds.
The effective amount of the detergent-active compound or
compounds used in the compo~ition of the in~ention will
generally be in the range of from 5 to 50% by weight,
prlef~rably from 6 to 30~ by weight based on thP total
composition.
The mlxing ratio of anionic to nonionic materials is not
very critical and can be varied as desired by the skilled
artisan. However, preference here i~ given to ratios
within the range of 4:1 to 1:4, preferably from 2:1 to
1 : ~ .
THE DETEGENCY BUILDE~
The deterglent composition according to the invention alss
contains a detergen~y builder, which can be an inorganic
builder or an organic builder, in an amount generally
within the range of from about 5~ to about 80%, preferably
from 10~ to 60~ by weight.
e s
- 11 C 7089
Examples of phosphorus-containing inorganic detergency
builders, when present, include the water soluble salts,
especially alkali metal pyrophosphates, orthophosphates
and polyphosphates. Specific examples of inorganic
phosphate builders include sodium and po~assium
tripolyphosphtes, phosphates and hexametaphosphates.
Examples of non-phosphorus-containing inorganic detergency
builders, when present, include water-soluble alkali metal
carbonates, bicarbonates, siLicates and crystalline and
amorphous alumino silicates. Specific ex2~ples include
sodium carbonate (with or without calcite seeds),
potassium carbonates, sodium and po~assium bicarbonates
and silicates.
Examples of organic detergency builders, when present,
include the alkali metal, ammonium and substitu~ed
ammonium polyacetates, carboxylates, polycarboxylates,
polyacetal carboxylates and polyhydroxysylphonates.
Specific examples include sodium, po~assium, lithium,
ammonium and substituted 2~monium salts of
ethylenediaminetetraacetic acid; nitrilotriacetic acid,
oxydisuccinic acid, melitic acid, ben~ene polycarboxylic
acids and citric acid.
THE POLYMER MIXTURE
The alkalLmetal carboxymethyl cellulose is preferably the
sodium or the potassium salt. All known types can be
used, with differen~ degrees of substitution and
viscositie~. The degree of substitution generally lies
between 0.5 and 0.9 and is mostly about 0.7. The term
"cellulose~ as used above is intended to include starch;
thus the corresponding alkyl starch ethers and carboxy
methyl starches are also suitable. The cellulose-based
compounds are however preferred.
3~
. - 12 - C 7089
Polymer (b) is a vinyl pyrrolidone polymer. As is
disclosed in the art, polyvinyl pyrrolidone i~ not a
single individual compound but may be obtained in almost
any degree of polymerisation. The degree of
polymerisation, which is most easily expressed in terms of
average molecular weight, is not critical provided the
material haq the designed water solubility and
soil-suspending power. In yeneral, suitable soil-
suspending vinyl pyrrolidone polymers are linear in
structure, and have an average molecular weight within the
range of about 5,000 to about 350,000, and preferably ~rom
about 15,000 to about 50,000. Suitable polymers will
al~o, generally, have a water solubility of greater than
0.3% at normal wash tempera~ures.
The polycarboxylate polymers (c) are di~closed and further
characterised in EP-A- 0137669 (Procter & Gamble), the
most important members of which are:
~i) those belonging to the class of copolymeric
poly~arboxylate~ which, form~lly at leastr are formed
from an unsaturated polycarboxylic acid such as
maleic acid, citraconic acid, itaconic ~cid and
metaconic acid as first monomer, and an unsaturated
monocarboxylic acid such as acrylic acid or an
alpha-Cl-C4-alkyl acrylic acid as second monomer.
Preferred copolymer~ of this class are copolymers of
maleic acid (anhydride~ and (meth) acrylic acid, as
disclosed in EP-B- 25551 and GB Patent 1 596 756.
(ii~ those belonging to the class of poly
(alpha-hydroxyacrylakes);
(iii) those belonging to the cla~s of polyacetal
carboxylates or acetal polycarboxylates; and
37
13 - C 7089
(iv) tho e belonging to the class of homopolymeric
polyacrylates.
Any polymer of these classes can be chosen as polymer (c)
S in the polymer additive system, either alone or as
mixture, though pre~erence i.s given to polymers of the
classes (i~ and (iv).
OTHER IN(;~EDIENTS
The compositions of the invention may also contain a
peroxyacid compound bleach system which includes the
organic peroxyacids per se, org2nic and inorganic
peroxyacid salts and bleach systems or compounds which
form organic peroxyacids in aqueou- media by perhydrolysis
or hydrolysis.
Examples of organic peroxyacids per se usable in the
present invention are monoperoxyazelaic acid,
diperoxyazelaic acid, diperoxyadipic acid,
diperoxydodecanedionic acid, decylbutanediperoxoic acid,
monoperoxy phthalic acid, peroxybenzoic acid,
m-chloroperbenzoic acid and diperoxyisophthalic acid.
Examples of peroxyacid salt~ usable here include magnesium
monoperoxyphthalate, potassium monop~rsulphate and
peroxymonophosphate.
Examples of compounds which form organic peroxyaclds in
situ by hydrolysis are benzoyl peroxide, which generates
peroxybenzoic acid, and diphthaloyl peroxide which
generates monoperoxyphthalic acid.
These compounds can be used in the composition in amounts
from 1 to 25% by weight, preferably from 2 to 10~ by
weight.
- 1~ C 7089
The invention, howe~er, prefers the use of peroxyacid
compound bleach systems comprising a mixture of an
inorganic or organic peroxide compound and a peroxyacid
bleach precursor. These systems generate peroxyacids in
situ from the perhydrolysis reaction between the peroxide
compound and the peroxyaci~ bleach precursor.
The inorganic or organic peroxide compounds as meant here
are the so-called peroxyhydrates and in~lude alkali metal
perborates, percarbonates, persilicates and perphosphates
and also urea peroxide, which liberate hydrogen perioxide
in aqueous solution. Preferred peroxide compounds are
sodium perborate, which can be in the mono- or
tetrahydrate form.
Any organic peroxyacid bleach precursors generating
peroxyacid on perhydrolysis known in the art; as described
i~, for example, British Patent~ 836 988, 970 950, 907
356, 855 735 and 1, 246 339; US Patents 4 128 494 and 3
20 332 882 Canadian Patent 844 481; and European Patent
Applicakions EP-A- 0098021 and EP-A- 0185522, can in
¦ principle be used.
As used such can be named glycerol triacetate, glucose
pentaacetate, tetraacetyl xylose, N,N,N',N'-tetraacetyl
ethylene diamine (TAED), tetraacetyl glycoluril,
N,N'-diacetyl acetoxy methyl malonamide, triacetyl
- cyanurate, sodium acetoxy benzene sulphonate, sodium
nonanoyloxy benzene sulphonate and sodium 3,S,5- trimethyl
hexanoyloxy benzene sulphona~e.
A particularly preferred peroxyacid compound bleach ystem
for use in the present invention i5 a mixture of sodium
perbora~e and tetraacetyl ethylene diamine ~TAED~o
3~
- 15 - C 7089
The peroxide compound and the peroxyacid bleach precursor
in the composition-~ of the invention can be used at the
usual levels of rom about ~ to 30~ by weight and from
about 0.5 to 20% by weight, respectively, at any ratio by
weight of peroxide compound to peroxyacid precursor
ranging from about 60:1 to about 1:10.
Preferred ranges in the composition of the invention are
2-15% by weight of peroxide compound, e.g. sodium
perborate, and from 0.5-10% by weight of peroxyacid
pxecursor, e.g. TAED, in a weight ratio of from 5:1 to
1:5, preferably from 3:1 to 1:2.
Bleach system and the polymer mixture of the invention are
important parameters for achievin~ good colour-care
propexties. Beneficial effects can be seen already at a
polymer mixture level a~ low as 0.3~ which can be
increased to about 15~ by weight. Gen~rally, however, a
polymer mixture level o~ not more than 10~ by weight will
be sufficient, with an optimum range of from about 0.6% to
6~ by weight.
As explained, detergent compositions formulated according
to the invention have the advantage over the compositions
of the art in that they show efficient cleaning combined
with improved colour-care characteristics.
Xt should, however, be appreciated that the detergent
composition according ~o the invention may further contain
any of the conventional additive~ in amounts in which such
materials are normally employed in fabric-washing
detergent compositions and which serve to further improve
the laund~ring characteristics and/or add aesthetic appear
to the compositlon. Examples of ~hese additives include
lather boosters, anti-foamin~ agents, alkaline materials
- 16 - C 70~9
such as sodium silicates, fabric-softening agents, enzymes
such as proteolytic, lipolytic and amylolytic enzymes,
corrosion inhibitors, inorganic salts, sequestering
agents, colouring agents and perfumes, so long as these
additives do not adversely influence the basic objective
of the invention.
In a preferred embodiment of the invention, the
composition is free from copper ions or other heavy metal
ions of the transition series, e.g. cobalt~ iron,
manganese, chromium and ~inc, which can form coloured
reaction product~ and thereby may negate the benefit of
colour-care.
In a further preferred embodiment, the invention omits the
use of fluorescent agents or optical bleaching agents, as
these additives could change the hue of the original
fabric colours.
The detergent compo ition of the invention can be
manufactured and presented in the form of a powder,
including granules, flakes, etc~; liquid; paste; or bar.
Detergent powder compositions according to the invention
can be prepared using any of the conventional
manufacturing techniques commonly used or proposed for the
preparation of fabric-washing detergent powder
compositions. These include slurry-making of the basic
ingredients followed by spray-drying or spray-cooling and
subsequent dry-dosing of sensitive ingredients not
suitable for incorporation prior to the drying or heating
step. other conventional techniques, such as noodling,
granulation, dry-mixing, and mixing by fluidisation in a
fluidised bed, may be ~ltilised as and when necessary and
desired. Such techniques are familiar to those skilled in
the art of detergent powdex composition manufacture.
- 17 - ~ 7089
In use, the detergent compositions according to the
in~ention are particularly suitable for washing, at lower
to medium temperatures, of both cotton and synthetic or
mixed cotton/synthetic fabrics.
Examples
The invention will now be illustrated in ~he following
examples.
,
xample 1
Detergent compositions were prepared having the
formulations set out below:
C12-linear alkyl benzene sulphonate 6.0 8.0
C13-Cl alcohol/7 ethylene oxides 4.0 4.0
C13-cl5 alcohol~3 ethylene oxide~3.0 4.0
Sodium tripolyphosphate 26.0 26.5
Alkaline sodium ilicate (1:2) 6.0 6.0
Sodium sulphate 30.0 30.0
Ethylenediamine tetraacetate (Na-salt) 0.1 0.1
Sodim carboxymethylcellulose 0.5 0.6
Polyvinylpyrrolidone (40,000) 0.5 0.6
Polyacrylate 1.0
Maleic acid/acrylic acid copolymer - 1.0
Sodium parborate te rahydrate 10.0 8.0
Tetraacetyl ethylene diamine (TAED) 4.0 3.0
30 Proteolytic enzyme (Savinase 6CM) 0.3
Proteolytic enzyme (Alcalase3 - O.3
Perfume 0.2 0.2
Water balance balance
The above composition~ were very good at displaying
excellent cleaning and detergency performance across the
range of wash temperatures with outs~anding colour-care
~ C 7089
-
performance on coloured fabrics and mixed loads of
coloured and white fabrics. No substantial bleeding of
colours was observed and, after several washes, the
coloured fabrics remained remarkably brlght with no
substantial dulling or fading being observed. Comparisons
between these compoqitions ~nd similar compositions in
which one or more components of the polymer mixture were
absent showed a preference for the compositions of the
invention, particularly in 1:erms of soil redeposition.
