Note: Descriptions are shown in the official language in which they were submitted.
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PROCESS FOR TREATMENT OF A FABRIC
Technical Field
The present invention relates to a process for treatment of
a fabric. It further relates to a composition and a kit for
treatment of a fabric. The invention will be described
hereinafter with reference to this application. However, it
will be appreciated that the invention is not limited to
this particular field of use.
Background and Prior Art
Any discussion of the prior art throughout the
specification should in no way be considered as an
admission that such prior art is widely known or forms part
of the common general knowledge in the field.
US2006046950A (Penninger and Bastigkeit, 2006) teaches a
detergent composition for cleaning textile materials
comprising a combination of a soil release-capable alkyl or
hydroxyalkyl cellulose derivative and a hygroscopic polymer
selected from the class consisting of polypeptides,
hydrogels, polyvinyl alcohol, the polyalkylene glycols, the
homopolymers of acrylic acid, methacrylic acid, and maleic
acid, copolymers of acrylic acid, methacrylic acid, and
maleic acid and mixtures of the homo and copolymers. The
use of the hygroscopic polymers in combination with the
cellulose derivatives is said to result in improved
cleaning performance.
EP025696 (Unilever, 1988) teaches that improvement in soil
suspension is achieved by adding mixture of vinyl
pyrollidone polymer and a nonionic cellulose ether to a
detergent composition.
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GB994353 (Domestos, 1965) teaches that mixtures of certain
polymeric materials, when incorporated into unbuilt
detergent compositions based on synthetic surface active
agents, provide enhanced anti-redeposition as compared to
activity of individual polymers alone when added alone to
same detergent compositions.
US3771951 (Berni et al, 1973) and GB133803 (Gaf Corp, 1973)
teach that detergent composition comprising a water soluble
detergent and a mixture of water soluble polyvinyl alcohol
and a water soluble poly vinyl pyrollidone exhibits
enhanced degree of soil suspension
The above methods are reported to provide improved
antiredeposition of soils and better cleaning of fabrics.
However, reduction in subsequent post-wash soiling of
fabrics is not reported. Further, the cleaning compositions
essentially comprise of a surfactant and the pH of wash
liquor is alkaline or neutral.
US4007305 (Kakar et al, 1977) addresses the problem of
providing satisfactory nondurable finishes to textiles
which impart optimum soil release and soil repellent
properties. According to D5, the textiles must be treated
with an alkaline aqueous medium having pH value of 7.5-11
and containing water soluble hydrophilic soil release
polymer having carboxylic acid groups and a dispersed
hydrophobic soil repellent fluorochemical.
On the other hand, various industrial treatments for fabric
modification are known to render the fabric less prone to
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soiling. The fabric modification of this type is normally
carried out during textile manufacture. The treatments,
besides being substrate-specific, are relatively difficult
to practise in household.
In view of the shortcomings of the prior art, one of the
objects of the present invention is to provide a process
for reducing soiling of fabrics that can be easily used in
the household.
Another object of the present invention is to provide a
process of treatment of a fabric for reducing soiling of
fabrics.
Yet another object of the present invention is to provide a
process for treatment of a fabric that improves efficacy of
subsequent cleaning.
Yet another object of the present invention is to provide a
process for reducing soiling of fabrics that allows
enhanced deposition of benefit agents, such as perfume and
fluorescer.
Yet another object of the present invention is to provide a
process for treatment of a fabric which is effective on
various types of fabrics such as cotton, polyester and
polycotton.
Yet another object of the present invention is to provide a
process for treatment of a fabric which is relatively easy
to practice in household.
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The present inventors have surprisingly found that
contacting a fabric in an aqueous medium having acidic pH
with two different polymers, one comprising a plurality of
hydroxyl groups and the other comprising a plurality of
carbonyl or ether groups, increases deposition of polymer
and provides benefits such as reduction in soiling, ease of
subsequent cleaning and enhanced deposition of benefit
agents.
Summary of the invention
According to a first aspect of the present invention there
is provided a process for treatment of a fabric comprising
the steps of contacting the fabric with polymers A and B in
an aqueous medium, wherein;
(a) polymer A is selected from the class consisting of
homopolymers or copolymers of vinyl alcohol,
alkylene glycol, saccharides, and carboxylic
acid, and;
(b) polymer B is selected from the class consisting of
homopolymers or copolymers of vinyl pyrrolidone,
alkylene oxide, saccharides and carboxylic acid,
and;
where polymers A and B are not of the same class and
the aqueous medium has pH less than 6.
30
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Detailed description of the invention
Fabric
The fabric that can be treated includes synthetic as well
5 as natural textiles. Fabrics may be made of cotton,
polycotton, polyester, silk or nylon. It is envisaged that
the method of the present invention can be used to treat
garments and other clothing and apparel materials that form
typical washload in household laundry. The household
materials that can be treated according to the process of
the present invention include, but are not limited to,
bedspreads, blankets, carpets, curtains and upholstery.
Although the process of the present invention is described
primarily for treatment of a fabric, it is envisaged that
the process of the present invention can be advantageously
used to treat other materials such as jute, leather, denim
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and canvass. It is envisaged that the process of the
present invention can be used to treat articles such as
shoes, rain-wear and jackets.
Polymer A
According to the present invention, polymer A has a
plurality of hydroxyl or carboxyl groups. The polymer A has
a molecular mass preferably from 300 to 109. The polymer A
is selected from the class consisting of homopolymers or
copolymers of vinyl alcohol, alkylene glycol, saccharides,
and carboxylic acid.
Some non-limiting examples of polymer A according to the
present invention include:
(a) Homopolymer of vinyl alcohol or polyvinyl alcohol.
(b) Homopolymer of ethylene or propylene glycol, i.e.
polyethylene glycol and polypropylene glycol.
(c) Homopolymer of a carboxylic acid, i.e. polycarboxylic
acid such as polyacrylic acid, polymaleic acid or copolymer
of acrylic and maleic acid.
(d) Polysaccharides such as starch, cellulose, sodium
alginate, natural gums, and their modified materials such
as sodium carboxymethyl cellulose, hydroxyethyl cellulose.
Homopolymer or copolymer of vinyl alcohol has a molecular
mass of preferably from 10,000 to 1,000,000, more
preferably from 50,000 to 500,000 and most preferably from
50,000 to 200,000. Commercially available polyvinyl
alcohols that can be used include GOHSENOLO (Nippon
Synthetic Chemical Industry), MOWIOLO (Clariant) and POVALO
(Kuraray).
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Homopolymer or copolymer of alkylene glycol has a molecular
mass of preferably from 4,000 to 20,000, more preferably
from 5,000 to 15,000 and most preferably from 5,000 to
10,000. Commercially available polyalkylene glycol can be
used. Some examples of commercially available polyalkylene
glycol include POLYGLYKOLO (Clariant) and CARBOWAX0 (Union
Carbide).
Homopolymer or copolymer of carboxylic acid has a molecular
mass of preferably from 2,000 to 10,000,000, more
preferably from 50,000 to 1,000,000 and most preferably
from 90,000 to 500,000.
Homopolymer or copolymer of saccharide has a molecular mass
of preferably from 1000 to 109, more preferably from 10000
to 109 and most preferably from 100,000 to 109.
Polymer A may be synthetic or natural. However, synthetic
polymer is preferred over natural polymer.
According to a preferred aspect, the polymer A is water
soluble.
It is preferred that the polymer A is selected from a class
consisting of homopolymers or copolymers of vinyl alcohol
or carboxylic acid.
The homopolymer or copolymer of carboxylic acid is
preferably a polyacrylic acid or a copolymer thereof.
Examples include SOKALANO PA (BASF) and CARBOPOLO
(Lubrizol).
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The amount of polymer A is preferably from 0.005 to 2, more
preferably from 0.02 to 1, and most preferably from 0.05 to
0.5 mg per cm2 area of the fabric. The term "fabric area"
as used herein refers to surface area of one side of the
fabric.
Polymer B
According to the present invention, polymer B has a
monomeric unit comprising ether or carbonyl group. Polymer
B has a molecular mass preferably from 1000 to 109. The
polymer B is selected from the class consisting of
homopolymers or copolymers of vinyl pyrrolidone, alkylene
oxide, saccharides and carboxylic acid.
Polymers and homopolymers of carboxylic acid and/or
sacchharides and/or polyalkylene glycol/ether qualify to be
selected both as polymer A or polymer B, as they comprise
hydroxyl or carboxyl group and either a carbonyl or an
ether group. However, according to an essential aspect,
polymer A and polymer B are not of the same class. It is
particularly preferred that the polymers A and B are
selected from different classes of polymers. Without
wishing to be limited by theory, it is believed that the
two polymers A and B, when dissolved in water, form a
complex with a solubility lower than each of the polymers A
and B, which helps in enhanced deposition and other
benefits.
Homopolymer or copolymer of vinyl pyrrolidone has a
molecular mass of preferably from 1000 to 10000000, more
preferably from 10,000 to 1,000,000 and most preferably
from 30,000 to 500,000. Commercially available polyvinyl
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pyrrolidone can be used, one example of which is LUVISKOLO
(BASF).
Homopolymer or copolymer of poly alkylene oxide has a
molecular mass greater than 20,000. The molecular mass is
preferably from 20,000 to 1,000,000, more preferably from
30,000 to 500,000 and most preferably from 50,000 to
200,000
Homopolymer or copolymer of saccharide has a molecular mass
of preferably from 1000 to 109, more preferably from 10,000
to 109 and most preferably from 100,000 to 109. Any
commercially available poly alkylene oxide, for example
POLY0X0 (Dow Chemical Co) can be used according to the
present invention.
Polymer B may be synthetic or natural. However, synthetic
polymer is preferred over natural polymer.
According to a preferred aspect, the polymer B is water
soluble.
It is particularly preferred that the polymer B is selected
from a class consisting of homopolymers or copolymers of
vinyl pyrrolidone or alkylene oxide.
The amount of polymer B is preferably from 0.005 to 2, more
preferably from 0.02 to 1, and most preferably from 0.05 to
0.5 mg per cm2 area of the fabric.
Some examples of combinations of polymer A and polymer B,
which are particularly preferred, are given below.
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Table 1: Preferred combination of the polymers
Polymer A Polymer B
Polyacrylic acid (PAA) Poly vinyl pyrrolidone (PVP)
Polyacrylic acid (PAA) Polyethylene Oxide(PEO)
Polyethylene Glycol (PEG) Polyacrylic acid (PAA)
Poly vinyl alcohol (PVA) Polyacrylic acid (PAA)
Poly vinyl alcohol (PVA) Polyethylene Oxide (PEO)
Sodium carboxymethyl Polyethylene Oxide (PEO)
cellulose (SCMC)
Hydroxyethyl cellulose Polyacrylic acid(PAA)
5
Most preferred combinations of the polymers are the ones in
the first three rows in the Table 1 above, i.e. PAA-PVP,
PAA-PEO and PEG-PAA.
10 Aqueous medium
According to the invention, the two polymers are contacted
with the fabric in an aqueous medium having pH less than 6.
The aqueous medium has pH preferably less than 5 and more
preferably less than 4. Aqueous medium has pH preferably
greater than 1 and more preferably greater than 2.
The polymers may be chosen in such a way that when the
polymers are added to the aqueous medium, pH of the aqueous
medium is less than 6. Preferably, an acidic ingredient is
added to aqueous medium to ensure that the pH of the
aqueous medium is less than 6. Acidic ingredients that
reduce pH of resulting aqueous medium to less than 6 are
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well known to a person skilled in the art and any suitable
acidic ingredient may be chosen.
The aqueous medium may comprise either polymer A, or
polymer B, or both the polymers. Alternatively, one or both
the polymers may be added to the aqueous medium during the
process of the present invention.
Polymer A, when mixed with the aqueous medium, is from
0.005 to 10%, more preferably from 0.05 to 5%, and most
preferably from 0.05 to 2% by weight of the aqueous medium.
Polymer B, when mixed with the aqueous medium, is from
0.005 to 10%, more preferably from 0.01 to 5%, and most
preferably from 0.01 to 2% by weight of the aqueous medium.
The aqueous medium preferably comprises an electrolyte. The
electrolyte is preferably from 0.001 to 5%, more preferably
from 0.01 to 1%, and most preferably from 0.04 to 0.2% by
weight of the aqueous medium.
Without wishing to be limited by theory, it is believed
that the addition of electrolyte allows the process of the
invention to be carried out with relatively low amounts of
polymers A and B.
Electrolytes that can be used according to the present
invention include water soluble ionic salts. The cation of
the salt includes an alkali metal, alkaline earth metal or
trivalent metal cation. The anion of the salt includes
chloride, sulphate, nitrate and phosphate. Some examples of
electrolytes include chlorides, sulphates or nitrates of
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sodium, potassium, magnesium or calcium. Calcium salts are
particularly preferred.
According to a preferred aspect, the aqueous medium
comprises no more than 200 ppm anionic surfactant. The
aqueous medium comprises no more than 100 ppm, more
preferably less than 50 ppm anionic surfactant. It is
particularly preferred that the aqueous medium is
substantially free of anionic surfactant.
The aqueous medium preferably comprises of at least one
benefit agent. The benefit agent that can be included in
the aqueous medium includes, but not limited to ingredients
such as perfume, fluorescer, deodorant, antibacterial
agent, shading dye and bluing agent. One of the advantages
of the present invention is that the deposition of benefit
agent is enhanced.
Process sequence
It is envisaged that the fabric is contacted with the
polymers A and B either sequentially in any order, or
simultaneously. Accordingly the fabric may be contacted
with polymer A, followed by contacting with polymer B.
Alternatively the fabric may be contacted with polymer B,
followed by contacting with polymer A. The fabric may be
simultaneously contacted with both the polymers A and B.
Although the fabric may be contacted simultaneously with
both the polymers, it is preferred that the fabric is
contacted with the polymers sequentially, in any order.
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Process of contacting
The step of contacting the fabric with polymers A and B can
be carried out in any suitable manner.
Polymers A, or polymer B, or both, are mixed with the
aqueous medium prior to contacting with the fabric.
Alternatively, polymer A may also be mixed with a non-
aqueous medium including solvents such as alcohol and
acetone prior to contacting with the fabric. However, it is
preferred that the polymer or polymers are mixed with the
aqueous medium prior to contacting with the fabric. The
fabric may be dipped into the aqueous medium comprising one
or more polymers. Alternatively, the aqueous medium
comprising one or both the polymers may be sprayed on the
fabric.
It is also envisaged that either of the polymers A and B
may be used in a form of abradable sticks which may be
rubbed against the area of the fabric to be treated,
followed by contact with the aqueous medium.
Composition
The compositions for the process of the invention typically
comprise 1-99% by weight polymer A, 1-99% by weight polymer
B, and 0 to 10% by weight an acidic ingredient wherein;
(a) polymer A is selected from the class
consisting of homopolymers or copolymers of
vinyl alcohol, alkylene glycol, saccharides,
and carboxylic acid, and;
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(b) polymer B is selected from the class
consisting of homopolymers or copolymers of
vinyl pyrrolidone, alkylene oxide, saccharides
and carboxylic acid, and;
where polymers A and B are not of the same class and the
pH of 1% aqueous solution of the composition is less
than 6.
The composition comprises preferably 5-95%, more preferably
10-90% and most preferably 20-80% by weight polymer A. The
composition comprises preferably 5-95%, more preferably 10-
90% and most preferably 20-80% by weight polymer B.
The polymers may be chosen in such a way that pH of 1%
aqueous solution of the composition is less than 6.
Preferably, an acidic ingredient is present in the
composition at 0.1-10% by weight of the composition to
ensure that the pH of 1% aqueous solution of the
composition is less than 6. Acidic ingredients that reduce
pH of resulting aqueous medium to less than 6 are well
known to a person skilled in the art and any suitable
acidic ingredient may be chosen.
Kit
A kit for treatment of a fabric may be provided comprising
the composition and a set of instructions for use.
It is particularly preferred that the polymers A and B are
separately packaged, i.e. the polymers A and B are packaged
individually in separate packs or in separate compartments
of a twin compartment package.
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Examples
The invention will now be demonstrated with examples. The
examples are by way of illustration only and do not limit
the scope of the invention in any manner.
Materials and methods
Following materials were used in the examples.
Table 2: Materials used in the examples
Material Source/ Supplier
Water Deionized water
Polyvinyl pyrrolidone molecular mass Aldrich
90000 and 1,300,000
Polyacrylic acid, molecular mass Aldrich
2000
Polyacrylic acid, sodium salt, Aldrich
molecular mass 8000
Polyacrylic acid, molecular mass Aldrich
450000
Polyvinyl alcohol molecular mass Aldrich
124,000
Polyethylene glycol, Fluka
Molecular mass 17500
Polyethylene oxide Aldrich
Molecular mass 100000
Polyester fabric Bombay Dyeing
Polycotton fabric Bombay Dyeing 67/33
Carbon soot Cabot India N220
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Deposition
Polymer A was polyacrylic acid of molecular mass 450000 in
examples 1 and 2 and comparative examples 1-A to 2-B.
Polymer B was polyvinyl pyrrolidone of molecular mass
90000, in example 1 and comparative examples A and B.
Polymer B in example 2 and comparative examples C, D, and
2A was polyethylene oxide molecular mass 100,000.
For deposition studies about 10 g of fabric was treated
with the polymers in solution and the weight gain was
determined gravimetrically after drying of treated fabrics.
Table 3: Deposition of polymers on cotton, polycotton and
polyester fabrics
Ex Polymer Polymer pH Total Total Total
No A (% by B (% by polymer polymer polymer
weight weight deposited deposited deposited
in in (g/100 g (g/100 g (g/100
g
aqueous aqueous fabric) fabric) fabric)
medium) medium) Cotton Polycotton Polyester
1 1 1 2.8 4.41 2.67 3.41
A 2 - 2.5 0.90 0.96 0.96
B - 2 5.2 0.87 0.70 0.78
2 0.5 0.5 3.2 2.67 2.68 4.37
C 1 - 2.6 1.40 1.72 1.30
D - 1 5.5 1.68 0.80 1.19
2A 0.5 0.5 8.0 1.49 1.52 1.27
From the results, it can be seen that the deposition of two
polymers when used together according to the process of the
present invention is significantly higher in comparison to
the fabrics treated with only one of the polymers.
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Soiling
Soiling Protocol
Fabric was treated with polymer and dried. Dried fabric was
dipped in carbon soot dispersion (150 ppm) in water which
was stabilized by addition of sodium alkylbenzene sulfonate
(50 ppm). The fabric was removed from the carbon soot
solution and immediately rinsed in water and dried. Change
in reflectance (AR), i.e. the difference in reflectance of
the fabric before and after soiling, was a measure of
soiling of fabric, with negative value of AR indicating
that the fabric was soiled.
In the following table, following abbreviations are used
PEG 17500 - polyethylene glycol, molecular mass 17,500.
PAA 8000 - polyacrylic acid, molecular mass 8,000.
PVA 124000 - polyvinyl alcohol, molecular mass 125,000.
PVP 90000 - polyvinyl pyrrolidone molecular mass 90,000.
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Table 4: Soiling of cotton fabrics with carbon soot
Example Polymer A Polymer B pH AR460* (Final -
No (% by (% by Initial)
weight in weight in After dipping
aqueous aqueous cotton fabric in
medium) medium) carbon soot
3 PEG 17500 PAA 8000 3.2 -1.7
(0.05%) (0.05%)
4 PVA 124000 PAA 8000 3.4 -4.7
(0.05%) (0.05%)
PAA (0.05%) PVP 90000 4.3 -0.1
(0.05%)
E PEG 17500 - 5.5 -31.7
(0.1%)
F - PAA - 3.3 -14.7
8000(0.1%)
G PVA 124000 - 5.9 -22.7
(0.1%)
H PVP 90000 6.9 -27.7
(0.1%)
I - - 7.0 -37.7
From the results, it can be seen that the soiling of
5 fabrics treated by the process of the present invention is
significantly less than untreated fabric (comparative
example I) or for the fabrics treated with only one of the
polymers (comparative examples F, G and H).
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Cleaning
Cleaning Protocol
Fabric was treated with polymer and dried. Dried fabric was
dipped in carbon soot dispersion (150 ppm) in water which
is stabilized by addition of sodium alkylbenzene sulfonate
(50 ppm). The fabric was then dried. The dried fabric was
then cleaned with water, sodium carbonate (0.15% by weight)
solution in water, and commercially available detergent
(SURF EXCEL 0.3% by weight) in water. Change in
reflectance (AR) was a measure of cleaning of fabric.
Higher values of AR indicate better cleaning.
Polymer A was polyacrylic acid of molecular mass 2000 and
polymer B was polyvinyl pyrrolidone of molecular mass
90000. In Example 6, both the polymers were used at 0.2 %
by weight of the aqueous medium. The pH of aqueous medium
was 3Ø In comparative examples J and K, polymers A and B
were used alone, respectively, each at 0.4% by weight of
the aqueous medium(pH 2.7 and 7.0, respectively).
Comparative example L is for untreated fabrics (pH 7). The
fabrics (cotton, polycotton and polyester) were cleaned
according to the protocol given and the results are
tabulated below
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Table 5: Cleaning of fabrics soiled with carbon soot
Ex AR460* after AR460* after AR460* after
No washing with washing with washing with
sodium water) SURF EXCEL )
carbonate)
C* PC** PE** C PC PE C PC PE
*
6 21.9 18.9 21.9 18.2 7.2 17.1 13.5 22.5 28.2
J 12.7 6.7 5.4 12.4 4.1 3.6 14.5 9.5 7.4
K 8.8 7.4 7.2 12.3 2.4 8.9 14.6 9.5 11.4
L 14.0 2.6 3.0 15.0 4.2 2.7 13.7 6.9 4.9
C* - Cotton
PC** - Polycotton
5 PE*** - Polyester
From the results, it is clear that the cleaning efficacy
for example 6, which is within scope of the present
invention, is higher than the cleaning efficacy obtained in
10 the comparative examples J, K and L which are outside the
scope of the present invention. In particular, the cleaning
efficacy is better in case of washing with sodium carbonate
or water. Further, the results show that cleaning efficacy
is particularly enhanced for polycotton and polyester
15 fabrics, when washing is with commercially available
surfactant.
Effect of electrolyte
Polymer A was polyacrylic acid of molecular mass 450,000
20 and polymer B was polyvinyl pyrrolidone of molecular mass
1,300,000. In all the examples, both the polymers were used
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at 0.1 % by weight of the aqueous medium. The effect of
electrolyte addition was studied by adding various
electrolytes at 0.1% by weight of the total aqueous medium.
The pH of aqueous media was in the range 2.7 to 3Ø The
fabrics (cotton, polycotton and polyester) were cleaned
using sodium carbonate (0.15% by weight) solution in water.
The results are tabulated below in terms of cleaning
efficacy.
Table 6: Effect of addition of electrolyte
Ex Electrolyte AR460* after washing with
No sodium carbonate)
C* PC** PE***
7 Sodium chloride 6.8 5.6 4.5
8 Magnesium Chloride 9.1 19.9 12.4
9 Calcium chloride 26.3 32.4 30.9
10 - 9.8 1.5 2.8
From the results, it is clear that the addition of an
electrolyte leads to further enhancement of cleaning
efficacy, in particular for polycotton and polyester
fabrics. Further, for cotton fabrics, calcium chloride in
particular gives enhancement in cleaning efficacy.
Perfume deposition
Protocol
Allyl amyl glycollate was taken as a representative
perfumery ingredient. Polymer A was polyacrylic acid having
molecular mass of 450,000 and polymer B was polyvinyl
pyrrolidone having molecular mass of 90000. The perfume was
added together with both the polymers A and B each at 0.1%
by weight of the aqueous medium (Example 11 - pH 2.8),
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polymer A and polymer B alone each at 0.2% by weight of the
aqueous medium (comparative example M - pH 3 and N - pH 7,
respectively), whilst comparative example 0 (pH 7) was for
untreated fabric. The perfume retention was evaluated for
various types of fabrics. The fabrics were tested for
perfume retention by a trained perfumer on the scale of 0
to 5 with score of 0 indicating no perfume impact and score
of 5 indicating maximum perfume impact. The details are
tabulated below.
Table 7: Deposition of perfume on fabrics
Ex Perfume Perfume impact Perfume impact
No impact score score score
(Cotton) (Polycotton) (Polyester)
11 2.5 1.5 2.5
M 0.5 0.5 0.75
N 0.5 0.5 0.75
0 0.5 0.5 0.5
From the results tabulated above, it is clear that the
perfume impact at 60 minutes is significantly higher for
the fabric treated according to the process of the present
invention.
Fluorescer deposition
Following experiments were carried out using 2 ppm CBSX0
(CIBA) as fluorescer. Details of polymers A and B are
tabulated below along with the results in terms of
whiteness score as measured by reflectance value on cotton.
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Table 8: Deposition of fluorescer on fabrics
Ex No Polymer A Polymer B R460 (Cotton)
12 PAA (2.5%) PEG (2.5%) 95.9
P PAA (5%) - 94.7
Q - PEG (5%) 89.9
R - - 85.7
From the results, it is clear that the fluorescer
deposition as indicated by whiteness score is enhanced when
the fabric is treated with both the polymers A and B
according to the process of the present invention (Example
12) as compared with untreated fabric (Comparative example
R) or fabric treated with only one of the polymers
(Comparative Examples P and Q).
It will be appreciated that the above examples clearly and
sufficiently describe the manner in which the process of
the present invention can be practiced. It will be further
appreciated that the process of the present invention is
capable of meeting the object of providing a process for
treatment of fabric that reduces soiling of fabrics,
improves efficacy of subsequent cleaning, allows enhanced
deposition of benefit agents and is effective on various
types of fabrics including cotton, polycotton and
polyester.
