Field of the Invention
[0001] The present invention relates to laundry compositions with an intense fragrance experience.
In particular laundry compositions comprising silicone and a perfume.
Background of the Invention
[0002] Consumers of laundry products desire enhanced fragrance experience both during and
after the laundry process. Fragrance is often conceived as an indicator of efficacy
of a laundry product. Manufacturers constantly strive to improve consumer fragrance
experiences.
US 2003 0212232 (The Procter and Gamble Company) discloses that dicarboxy functionalized polyorganosiloxanes
can be used in home care formulations, particularly in cleaning, rinsing or care compositions
... targeted at conferring on the above surfaces benefits such as ...improving the
residuality, impact and or efficacy of active materials comprised in said compositions
on the surfaces treated therewith. It is further disclosed that among the other common
additive and/or active agents which are part of the formulation includes perfumes.
US 2007 0225198 (The Procter & Gamble Company) discloses fabric laundering compositions comprising
selected organiosilicones which are formulated into microemulsions for improved deposition
onto fabrics to provide fabric care benefits. The compositions comprise an organosilicone
and another laundry adjunct material, which may be a perfume.
US 2002 0148994 (Givaudan SA) discloses a fabric composition which provides long-lasting fragrance
retention, malodour reduction, and wrinkle abatement. This composition includes a
water soluble silicone, a fragrance composition and an aqueous carrier containing
an emulsifier. Although these disclosures present compositions with improved fabric
care and fragrance retention, there remains a need to further improve the fragrance
experience of a consumer particularly the intensity of the post wash fragrance experience.
Summary of the Invention
[0004] In one embodiment of the invention is provided a laundry composition comprising 0.01
to 5 w.t.% of an anionic silicone and a perfume, wherein the anionic groups on the
anionic silicone are located in pendent positions on the silicone and the anionic
silicone and perfume are pre-mixed prior to addition to the base laundry composition.
In another embodiment is provided a method of producing the laundry composition of
any one of the claims 1 to 11, said method comprising the steps of:
- Preparing a pre-mix of anionic silicone and perfume
- Adding the pre-mix to a base laundry composition.
In another embodiment is provided a use of the laundry composition according to any
one of the claims 1 to 11 to improve the perfume intensity of the laundry composition.
Detailed Description of the Invention
Anionic Silicone
[0006] The anionic groups on the anionic silicones of the present invention are located
in pendent positions on the silicone i.e. the composition comprises anionic silicones
wherein the anionic group is located in a position other than at the end of the silicone
chain. The terms 'terminal position' and 'at the end of the silicone chain' are used
to indicate the terminus of the silicone chain.
When the silicones are linear in nature, there are two ends to the silicone chain.
In this case the anionic silicone preferably contains no anionic groups located on
a terminal position of the silicone. When the silicones are branched in nature, the
terminal position is deemed to be the two ends of the longest linear silicone chain.
Preferably, no anionic functionality is not located on the terminus of the longest
linear silicone chain.
Preferred anionic silicones are those that comprise the anionic group at a mid-chain
position on the silicone. Preferably the anionic group(s) of the anionic silicone
are located at least five Si atoms from a terminal position on the silicone. Preferably,
the anionic groups are distributed randomly along the silicone chain.
Examples of anionic silicones suitable for the current invention include silicones
comprising the following functionalities; carboxylic, sulphate, sulphonic, phosphate
and/or phosphonate functionality.
Preferably, the anionic silicones of the current invention comprise silicones having
a functionality selected from; carboxylic, sulphate, sulphonic, phosphate and/or phosphonate
functionality or mixtures thereof. More preferably, the anionic silicone of the present
invention comprises carboxyl functionality. Most preferably, the anionic silicone
of the current invention is a carboxyl silicone. For the purposes of the current invention,
the anionic silicone may be in the form of the acid or the anion. For example for
a carboxyl functionalised silicone, may be present as a carboxylic acid or carboxylate
anion.
[0007] An example of a commercially available material is: X22-3701 E from Shin Etsu and
Pelosil PS-100 from Pheonix Chemical.
Preferably, the anionic silicone has a molecular weight of from 1,000 to 100,000,
more preferably from 2,000 to 50,000 even more preferably from 5,000 to 50,000.
Preferably, the anionic silicone has an anionic group content of at least 1 mol%,
preferably at least 2 mol%.
The silicone composition of the current invention may be in the form of an emulsion,
oil or as a silicone fluid. In a preferred embodiment the silicone is in the form
of a silicone fluid.
When the silicone is in an emulsion, the particle size can be in the range from about
1 nm to 100 microns and preferably from about 10 nm to about 10 microns including
microemulsions (< 150 nm), standard emulsions (about 200 nm to about 500 nm) and macroemulsions
(about 1 micron to about 20 microns).
[0008] Laundry compositions according to the current invention comprise anionic silicone
at a level of 0.01 to 5 w.t % of the formulation, more preferably 0.1 to 2.5 w.t.
% of the formulation.
Perfume
[0009] A perfume according to the present invention is defined as a composition comprising
top, middle and bottom notes. A perfume composition according to the present invention
comprises 3-300 different perfume ingredient. Preferably, the perfume comprises more
than 4, more preferably more than 5, most preferably more than 6 different perfume
ingredients, with an upper limit of 300 perfume ingredients.
[0010] Useful components of the perfume include materials of both natural and synthetic
origin. They include single compounds and mixtures. Specific examples of such components
may be found in the current literature, e.g., in
Fenaroli's Handbook of Flavor Ingredients, 1975, CRC Press;
Synthetic Food Adjuncts, 1947 by M. B. Jacobs, edited by Van Nostrand; or
Perfume and Flavor Chemicals by S. Arctander 1969, Montclair, N.J. (USA). These substances are well known to the person skilled in the art of perfuming,
flavouring, and/or aromatizing consumer products. Particularly preferred perfume ingredients
are blooming perfume ingredients and substantive perfume ingredients. Blooming perfume
ingredients are defined by a boiling point less than 250°C and a LogP greater than
2.5. Substantive perfume ingredients are defined by a boiling point greater than 250°C
and a LogP greater than 2.5. Preferably, a perfume composition will comprise a mixture
of blooming and substantive perfume ingredients. The perfume composition may comprise
other perfume ingredients. The perfume composition may comprise other perfume ingredients
for example pro fragrances.
[0011] The laundry composition of the present invention preferably comprises 0.01 to 20
w.t. % perfume, more preferable 0.25 to 15 w.t. % perfume, most preferably 0.1 to
10 w.t. % perfume.
Perfume and anionic silicone pre-mix
[0012] The perfume and anionic silicone are premixed prior to addition to the laundry composition.
The mix may comprise silicone fluid and perfume, silicone oil and perfume or silicone
emulsion and perfume.
[0013] The premix may be homogeneous or non-homogeneous.
[0014] In a preferred embodiment the perfume and anionic silicone form an emulsion. The
emulsion does not require an emulsifier, however in some embodiments an emulsifier
may be present. Examples of suitable emulsifiers include anionic and non-ionic surfactants.
[0015] In a more preferred embodiment the pre-mix is in the form of an emulsion formed from
silicone fluid and perfume.
Perfume: silicone ratio
[0016] In laundry compositions of the present invention the ratio of perfume to anionic
silicone is preferably 20:1 to 1:10. More preferably, the ration of perfume to anionic
silicone is 20:1 to 1:1.
Laundry compositions
[0017] By laundry composition is meant any composition which may be used during the laundry
process. For example a pre-treatment, a composition for the main wash (including detergent
compositions and auxiliary compositions for additional benefits), a rinse added product
such as a fabric softening composition, a post wash treatment or a refresh spray.
The compositions may be in any physical form e.g. a solid such as a powder or granules,
a tablet, a solid bar, a paste, gel or liquid.
The active ingredient in the compositions is preferably a surface active agent or
a fabric softening agent. More than one active ingredient may be included and for
some applications a mixture of active ingredients may be used. For example, a main
wash product may include a fabric softening agent and the rinse added product may
include a surface active agent.
[0018] In a preferred embodiment the composition is a main wash or rinse add product comprising
a fabric softening agent.
Main wash product
[0019] Detergent compositions of the invention may suitably comprise:
- (a) from 5 to 60 wt percent, preferably from 10 to 40 wt percent, of organic surfactant,
- (b) optionally from 5 to 80 wt percent, preferably from 10 to 60 w percent, of detergency
builder,
- (c) optionally other detergent ingredients to 100 wt percent.
[0020] The detergent compositions of the invention may contain a surface-active compound
(surfactant) which may be chosen from soap and non-soap anionic, cationic, non-ionic,
amphoteric and zwitterionic surface-active compounds and mixtures thereof. Many suitable
surface-active compounds are available and are fully described in the literature,
for example, in "Surface-Active Agents and Detergents", Volumes I and II, by Schwartz,
Perry and Berch.
[0021] The preferred detergent-active compounds that can be used are soaps and synthetic
non-soap anionic and non-ionic compounds.
[0022] The compositions of the invention may contain linear alkylbenzene sulphonate, particularly
linear alkylbenzene sulphonates having an alkyl chain length of C8-C15. It is preferred
if the level of linear alkylbenzene sulphonate is from 0 wt percent to 30 wt percent,
more preferably 1 wt percent to 25 wt percent, most preferably from 2 wt percent to
15 wt percent.
[0023] The compositions of the invention may contain other anionic surfactants in amounts
additional to the percentages quoted above. Suitable anionic surfactants are well-known
to those skilled in the art. Examples include primary and secondary alkyl sulphates,
particularly C8-C15 primary alkyl sulphates; alkyl ether sulphates; olefin sulphonates;
alkyl xylene sulphonates; dialkyl sulphosuccinates; and fatty acid ester sulphonates.
Sodium salts are generally preferred.
The compositions of the invention may also contain non-ionic surfactant. Nonionic
surfactants that may be used include the primary and secondary alcohol ethoxylates,
especially the C8-C20 aliphatic alcohols ethoxylated with an average of from 1 to
20 moles of ethylene oxide per mole of alcohol, and more especially the C10-C15 primary
and secondary aliphatic alcohols ethoxylated with an average of from 1 to 10 moles
of ethylene oxide per mole of alcohol. Non-ethoxylated nonionic surfactants include
alkylpolyglycosides, glycerol monoethers, and polyhydroxyamides (glucamide).
[0024] It is preferred if the level of non-ionic surfactant is from 0 wt percent to 30 wt
percent, preferably from 1 wt percent to 25 wt percent, most preferably from 2 wt
percent to 15 wt percent.
[0025] It is also possible to include certain mono-alkyl cationic surfactants which can
be used in main-wash compositions for fabrics. Cationic surfactants that may be used
include quaternary ammonium salts of the general formula R1 R2R3R4N+ X- wherein the
R groups are long or short hydrocarbon chains, typically alkyl, hydroxyalkyl or ethoxylated
alkyl groups, and X is a counter-ion (for example, compounds in which R1 is a C8-C22
alkyl group, preferably a C8-C10 or C12-C14 alkyl group, R2 is a methyl group, and
R3 and R4, which may be the same or different, are methyl or hydroxyethyl groups);
and cationic esters (for example, choline esters).
[0026] The choice of surface-active compound (surfactant), and the amount present, will
depend on the intended use of the detergent composition. In fabric washing compositions,
different surfactant systems may be chosen, as is well known to the skilled formulator,
for handwashing products and for products intended for use in different types of washing
machine.
[0027] Detergent compositions suitable for use in most automatic fabric washing machines
generally contain anionic non-soap surfactant, or non-ionic surfactant, or combinations
of the two in any suitable ratio, optionally together with soap.
Fabric softening agent
[0028] Any conventional fabric softening agent may be used in the compositions of the present
invention. The softening agents may be cationic or non-ionic. They may for example,
be used in amounts from 3 percent to 35 percent, preferably from 4 percent to 30 percent
more preferably from 5 percent to 25 percent by weight of the composition.
[0029] The softening active for use in rinse conditioner compositions of the invention is
preferably a quaternary ammonium compound (QAC). The preferred quaternary ammonium
compounds for use in compositions of the present invention are the so called "ester
quats" comprising an ester link. Particularly preferred materials are the ester-linked
triethanolamine (TEA) quaternary ammonium compounds comprising a mixture of mono-,
di- and tri-ester linked components. Most preferably the ester-linked quaternary ammonium
compound is an ester-linked triethanolamine quaternary ammonium compound comprising
unsaturated fatty chains.
[0030] Typically, TEA-based fabric softening actives comprise a mixture of mono, di- and
tri-ester forms of the compound where the di-ester linked component comprises no more
than 70 % by weight of the fabric softening compound, preferably no more than 60 %,
e.g. 55 %, or 45 % of the fabric softening compound and at least 10 % of the monoester
linked component, for example 11 % monoester. A preferred hardened type of active
has a typical mono:di:tri ester distribution of from 18 to 22 monoester: from 58 to
62 diester: from 18 to 22 triester; for example 20:60:20. A soft TEA quat may have
a typical mono:di:tri ester distribution of from 25 to 45 %, preferably from 30 to
40 % monoester: from 45 to 60 %, preferably from 50 to 55 % diester: and from 5 to
25 %, preferably from 10 to 15 % triester; for example 40:50:10.
[0031] A first group of quaternary ammonium compounds (QACs) suitable for use in the present
invention is represented by formula (I):
wherein each R is independently selected from a C
5-35 alkyl or alkenyl group; R
1 represents a C
1-4 alkyl, C
2-4 alkenyl or a C
1-4 hydroxyalkyl group; T is generally O-CO. (i.e. an ester group bound to R
via its carbon atom), but may alternatively be CO-O (i.e. an ester group bound to R
via its oxygen atom); n is a number selected from 1 to 4; m is a number selected from
1, 2, or 3; and X
- is an anionic counter-ion, such as a halide or alkyl sulphate, e.g. chloride or methylsulphate.
Di-esters variants of formula I (i.e. m = 2) are preferred and typically have mono-
and tri-ester analogues associated with them. Such materials are particularly suitable
for use in the present invention. Especially preferred agents are preparations which
are rich in the di-esters of triethanolammonium methylsulfate, otherwise referred
to as "TEA ester quats".
[0032] Commercial examples include Stepantex™ UL85, ex Stepan, Prapagen™ TQL, ex Clariant,
and Tetranyl™ AHT-1, ex Kao, (both di-[hardened tallow ester] of triethanolammonium
methylsulphate), AT-1 (di-[tallow ester] of triethanolammonium methylsulphate), and
L5/90 (di-[palm ester] of triethanolammonium methylsulphate), both ex Kao, and Rewoquat™
WE15 (a di-ester of triethanolammonium methylsulphate having fatty acyl residues deriving
from C
10-C
20 and C
16-C
18 unsaturated fatty acids), ex Evonik.
[0033] Also suitable are soft quaternary ammonium actives such as Stepantex VK90, Stepantex
VT90, SP88 (ex-Stepan), Ceca Noramine, Prapagen TQ (ex-Clariant), Dehyquart AU-57
(ex-Cognis), Rewoquat WE18 (ex-Degussa) and Tetranyl L190 P, Tetranyl L190 SP and
Tetranyl L190 S (all ex-Kao).
[0034] A second group of QACs suitable for use in the invention is represented by formula
(II):
wherein each R
1 group is independently selected from C
1-4 alkyl, hydroxyalkyl or C
2-4 alkenyl groups; and wherein each R
2 group is independently selected from C
8-28 alkyl or alkenyl groups; and wherein n, T, and X
- are as defined above.
[0035] Preferred materials of this second group include 1,2
bis[tallowoyloxy]-3-trimethylammonium propane chloride, 1,2
bis[hardened tallowoyloxy]-3-trimethylammonium propane chloride, 1,2-
bis[oleoyloxy]-3-trimethylammonium propane chloride, and 1,2
bis[stearoyloxy]-3-trimethylammonium propane chloride. Such materials are described in
US 4,137,180 (Lever Brothers). Preferably, these materials also comprise an amount of the corresponding
mono-ester. A third group of QACs suitable for use in the invention is represented
by formula (III):
(R
1)
2-N
+-[(CH
2)
n-T-R
2]
2X
- (III)
wherein each R
1 group is independently selected from C
1-4 alkyl, or C
2-4alkenyl groups; and wherein each R
2 group is independently selected from C
8-28 alkyl or alkenyl groups; and n, T, and X
- are as defined above. Preferred materials of this third group include bis(2-tallowoyloxyethyl)dimethyl
ammonium chloride and hardened versions thereof.
[0036] The iodine value of the quaternary ammonium fabric softening material is preferably
from 0 to 80, more preferably from 0 to 60, and most preferably from 0 to 45. The
iodine value may be chosen as appropriate. Essentially saturated material having an
iodine value of from 0 to 5, preferably from 0 to 1 may be used in the compositions
of the invention. Such materials are known as "hardened" quaternary ammonium compounds.
[0037] A further preferred range of iodine values is from 20 to 60, preferably 25 to 50,
more preferably from 30 to 45. A material of this type is a "soft" triethanolamine
quaternary ammonium compound, preferably triethanolamine di-alkylester methylsulphate.
Such ester-linked triethanolamine quaternary ammonium compounds comprise unsaturated
fatty chains.
[0038] Iodine value as used in the context of the present invention refers to, the fatty
acid used to produce the QAC, the measurement of the degree of unsaturation present
in a material by a method of nmr spectroscopy as described in
Anal. Chem., 34,1136 (1962) Johnson and Shoolery.
[0039] A further type of softening compound may be a non-ester quaternary ammonium material
represented by formula (IV):
wherein each R
1 group is independently selected from C
1-4 alkyl, hydroxyalkyl or C
2-4 alkenyl groups; each R
2 group is independently selected from C
8-28 alkyl or alkenyl groups, and X
- is as defined above.
[0040] It is advantageous if the quaternary ammonium material is biologically biodegradable.
[0041] Other useful cationic softening agents are alkyl pyridinium salts and substituted
imidazoline species. Also useful are primary, secondary and tertiary amines and the
condensation products of fatty acids with alkylpolyamines.
[0042] The compositions may alternatively or additionally contain water-soluble cationic
fabric softeners, as described in
GB 2 039 556B (Unilever).
[0043] The compositions may comprise a cationic fabric softening compound and an oil, for
example as disclosed in
EP-A-0829531.
[0044] The compositions may alternatively or additionally contain nonionic fabric softening
agents such as lanolin and derivatives thereof.
[0045] Lecithins and other phospholipids are also suitable softening compounds.
[0046] In fabric softening compositions nonionic stabilising agent may be present. Suitable
nonionic stabilising agents may be present such as linear C
8 to C
22 alcohols alkoxylated with 10 to 20 moles of alkylene oxide, C
10 to C
20 alcohols, or mixtures thereof. Other stabilising agents include the deflocculating
polymers as described in
EP 0415698A2 and
EP 0458599 B1.
[0047] Advantageously the nonionic stabilising agent is a linear C
8 to C
22 alcohol alkoxylated with 10 to 20 moles of alkylene oxide. Preferably, the level
of nonionic stabiliser is within the range from 0.1 to 10 percent by weight, more
preferably from 0.5 to 5 percent by weight, most preferably from 1 to 4 percent by
weight. The mole ratio of the quaternary ammonium compound and/or other cationic softening
agent to the nonionic stabilising agent is suitably within the range from 40:1 to
about 1:1, preferably within the range from 18:1 to about 3:1.
[0048] The composition can also contain fatty acids, for example C
8 to C
24 alkyl or alkenyl monocarboxylic acids or polymers thereof. Preferably saturated fatty
acids are used, in particular, hardened tallow C
16 to C
18 fatty acids. Preferably the fatty acid is non-saponified, more preferably the fatty
acid is free, for example oleic acid, lauric acid or tallow fatty acid. The level
of fatty acid material is preferably more than 0.1 percent by weight, more preferably
more than 0.2 percent by weight. Concentrated compositions may comprise from 0.5 to
20 percent by weight of fatty acid, more preferably 1 percent to 10 percent by weight.
The weight ratio of quaternary ammonium material or other cationic softening agent
to fatty acid material is preferably from 10:1 to 1:10.
Other polymers
[0049] The compositions may comprise one or more polymers, these may be in addition to a
detergent or fabric softening agent or an alternative to these. The polymers suitable
for use in the composition include cleaning polymers, viscosity control polymers,
structuring polymers and polymers for colour and garment care. Preferred polymers
include ethoxylated polyethylene imine (available as Sokalan HP20 ex. BASF) and/or
polyester soil release polymers. Preferably the detergent liquid further comprises
at least 0.5 wt% ethoxylated polyethylene imine polymer. For example polyester soil
release polymers and ethoxylated polyethylene imine.
Deposition polymer
[0050] The laundry composition of the present invention preferably comprises a cationic
deposition polymer.
[0051] The cationic polymer may be naturally derived or synthetic. Examples of suitable
cationic polymers include: acrylate polymers, cationic amino resins, cationic urea
resins, and cationic polysaccharides, including: cationic celluloses, cationic guars
and cationic starches.
[0052] Preferably the cationic polymer is selected from; cationic polysaccharides and acrylate
polymers. More preferably the deposition polymer is a cationic polysaccharide.
[0053] The molecular weight of the cationic polymer is preferably greater than 50 000 g/mol,
more preferably greater than 100 000 g/mol. The molecular weight is preferably less
than 5 000 000 g/mol.
Other optional ingredients
[0054] The compositions of the present invention may comprise other ingredients suitable
for laundry compositions as will be known to the person skilled in the art. Among
such materials there may be mentioned: antifoams, other free perfumes, encapsulated
perfumes and fragrances, insect repellents, shading or hueing dyes, preservatives
(e.g. bactericides), enzymes, dye transfer inhibitors, pH buffering agents, perfume
carriers, hydrotropes, anti-redeposition agents, soil-release agents, softening agents,
polyelectrolytes, anti-shrinking agents, anti-wrinkle agents, anti-oxidants, dyes,
colorants, fluorescent agents, sunscreens, anti-corrosion agents, drape imparting
agents, antistatic agents, sequestrants and ironing aids. The products of the invention
may contain pearlisers and/or opacifiers. A preferred sequestrant is HEDP, an abbreviation
for Etidronic acid or 1-hydroxyethane 1,1-diphosphonic acid.
Method of production
[0055] The laundry composition according to the claims of the present invention is prepared
by the following method:
- Preparing a pre-mix of anionic silicone and perfume
- Adding the pre-mix to a base laundry composition.
Preferably the pre-mix is prepared as an emulsion. The emulsion may be with or without
an emulsifier.
Use of the present invention
[0056] The laundry composition according to the claims of the present invention is used
for improving the perfume intensity of the laundry composition.
Examples
Example 1: Compatibility
[0057] The compatibility of various silicones and fragrances were accessed in the laundry
product Base #1.
Table 1: Composition of base #1
Ingredient |
Base #1 (w.t % active) |
LAS acid |
6.4 |
Neodol 25_71 |
9.5 |
SLES 3EO |
3.1 |
Glycerol |
1.0 |
NAOH |
1.2 |
triethanolamine |
1.8 |
Citric acid |
0.9 |
Fatty acid |
1.0 |
Phosphonate |
0.2 |
Ucare LR4002 |
0.15 |
Minors |
minor |
Water |
To 100 |
Neodol 25_71 - C12-C15 alcohol ethoxylate with 7 moles of ethylene oxide
Ucare LR4002 - cationic polymer ex. The Dow Chemical Company
Base #1 is a clear composition. |
[0058] Fragrance A - D are proprietary perfumes used in Unilever laundry products which
are commercially available. Fragrances A-D all comprise top middle and bottom notes
and comprise 3-300 different perfume ingredients.
[0059] All Fragrances A - D produce a clear composition when added to Base #1
Silicone A - Polydimethylsiloxane (PDMS) 1000 Cst
Silicone B - X-22-162C difunctional carboxylic silicone ex. Shin-Etsu
Silicone C - Carboxysilicone ex. Wacker, according to the invention
Silicone D - TEGOMER® C-Si 2342 ex. Evonik
Silicone E - Carboxysilicone ex. Dow Coming, according to the invention
Silicone A has no carboxy groups, Silicone B has terminal carboxy groups, Silicone
C-E have pendent carboxy groups.
[0060] All Silicones A - E produce a cloudy composition when added as non-aqueous silicone
fluids (ie not as a silicone emulsion) to Base #1
Method
[0061] Water and hydrotropes were mixed together at ambient temperature (approximately 22°C)
for 2-3 minutes at a shear rate of 150 rpm using a Janke & Kunkel IKA RW20 overhead
mixer. Salts and alkalis were added and mixed for 5 minutes prior to addition of surfactants
and fatty acid. After allowing to cool to <30°C, Ucare LR400 (cationic polymer) was
added as an aqueous solution, and any remaining components such as preservatives and
dyes.
[0062] The fragrance and silicone where added to the base either sequentially or pre-mixed
together in an emulsion. The silicone and fragrance emulsions only contained the silicone
fluid and fragrance, no carriers or emulsifiers were present.
[0063] All runs comprised:
- 50g of base #1
- 0.33g of fragrance
- 0.2g of Silicone
Table 2: Results of compatibility test
Run No. |
Order of addition |
Clarity of Final Formulation |
1 |
2 |
3 |
1 |
Base #1 |
Frag-A |
Si-A |
hazy |
2 |
Base #1 |
Si-A |
Frag-A |
hazy |
3 |
Base #1 |
Frag-A + Si-A |
|
hazy |
4 |
Base #1 |
Frag-A |
Si-C |
hazy |
5 |
Base #1 |
Si-C |
Frag-C |
hazy |
6 |
Base #1 |
Frag-A + Si-C |
|
clear |
7 |
Base #1 |
Frag-B |
Si-C |
hazy |
8 |
Base #1 |
Si-C |
Frag-B |
hazy |
9 |
Base #1 |
Frag-B + Si-C |
|
clear |
10 |
Base #1 |
Frag-C |
Si-C |
hazy |
11 |
Base #1 |
Si-C |
Frag-C |
hazy |
12 |
Base #1 |
Frag-C + Si-B |
|
hazy |
13 |
Base #1 |
Frag-C + Si-C |
|
clear |
14 |
Base #1 |
Frag-C + Si-D |
|
clear |
15 |
Base #1 |
Frag-C + Si-E |
|
clear |
16 |
Base #1 |
Frag-D |
Si-C |
hazy |
17 |
Base #1 |
Si-C |
Frag-D |
hazy |
18 |
Base #1 |
Frag-D + Si-C |
|
clear |
Table 2 demonstrates that a premix of certain silicones and a fragrance provides a
clear final composition whereas sequential addition of these components leads to a
hazy final composition. The silicone and fragrance mixes which provide a clear final
compositions are those with carboxy groups in a pendent position on the silicone.
Example 2: Perfume intensity
Method of production of formulation:
[0064] Water and hydrotropes were mixed together at ambient temperature (approximately 22°C)
for 2-3 minutes at a shear rate of 150 rpm using a Janke & Kunkel IKA RW20 overhead
mixer. Salts and alkalis were added and mixed for 5 minutes prior to addition of surfactants
and fatty acid. After allowing to cool to <30°C, Ucare LR400 (cationic polymer) was
added as an aqueous solution, and any remaining components such as preservatives and
dyes.
[0065] Formulations with a number are according to the invention, formulations with a letter
are comparative.
Table 3: Composition of Base #2
Ingredient |
Base #2 (w.t % active) |
Monoproylene glycol |
2.000 |
Glycerol |
5.000 |
NaOH |
To pH 8.0-8.5 |
TEA |
1.690 |
Citric Acid |
0.000 |
Neodol 25_71 |
12.000 |
LAS acid |
8.000 |
Fatty Acid |
1.500 |
SLES 3EO |
4.000 |
Ucare LR4002 |
0.450 |
Minors: cleaning enzymes, dye, preservative |
<2 |
Water |
To 100 |
[0066] The silicone and fragrance were added to Base #2 sequentially and as a blend as shown
in Table 4. The silicone fluid and fragrance blends were prepared by mixing at ambient
temperature (approximately 22°C) for 5-10 minutes at a shear rate of 100 rpm using
a Janke & Kunkel IKA RW20 overhead mixer. The blends did not contain an emulsifier
(eg an anionic or nonionic surfactant).
[0067] Both the individual components and the blend of silicone and fragrance were added
directly to Base #2.
Table 4: Silicone and Fragrance Compositions
|
A |
1 |
B |
2 |
C |
3 |
D |
4 |
Total base #2 (g) |
200 |
200 |
200 |
200 |
200 |
200 |
200 |
200 |
Fragrance3 (g) |
1.25 |
- |
1.875 |
- |
2.5 |
- |
3.14 |
- |
Silicone emulsion4 (g) |
5 |
- |
5 |
- |
5 |
- |
5 |
- |
Silicone fluid5 / Fragrance3 emulsion (g) |
- |
2.5/1.25 |
- |
2.5/1.875 |
- |
2.5/2.5 |
- |
2.5/3.14 |
Fragrance3 - Fragrance B as above
Silicone emulsion4 - Silicone C above, prepared as an emulsion with tergitol TMN-6
Silicone fluid5 - Silicone C as above
The silicone fluid and fragrance form an emulsion. |
Wash experiment and panel test:
[0068] The laundry detergent compositions where tested in Computer Controlled Miele Machines,
model no. W1613. The machines were programmed to a 40°C cotton cycle with 3 rinses.
The water hardness was 26°FH (3:1 Calcium:Magnesium ratio).
[0069] A 1 ½ kg ballast load comprising of Polycotton sheeting (approx size 50x100cm) and
35 Terry Towelling Squares (20x20cm size) were added to the machine drum. The towelling
squares were mixed in with the sheeting in a random order within the drum.
[0070] 35g of the laundry detergent composition was added to the drum via a dosing ball,
door was closed and then the machine set to wash. When the wash finished the load
was removed from the machine. The terry towelling squares were separated and line
dried on racks overnight. The sheeting was tumble dried.
[0071] The washing and drying process is repeated again to achieve 5 washes with drying.
After 5 cycles, the Terry Towelling Squares where line dried for 24 hours and then
used for the panel tests.
[0072] The panellists had all undergone olfactive screening to ensure suitability for an
olfactive assessment.
[0073] The 'paired comparison' sensory technique was used for the perfume intensity trial.
[0074] Two dry test cloths and 1 blank control cloth were presented to each participant.
Test samples were presented in a randomised order, with the control cloth always being
presented after the 1st and before the 2nd test cloths. The participants were asked
to pick up the first test cloth (e.g. A1) in both hands and instructed to gently manipulate
it close to their nose, noting how intense the perfume was. The participant was then
instructed to pick up the blank cloth and treat it in the same way. Lastly the participant
picked up the second of the test cloth (e.g. A2), manipulating it close to the nose
and judge if it was more or less intense than the first test cloth.
Table 5 - Results of Perfume Intensity Trial
Paired comparison |
Formulation |
Times chosen as most intense |
Preference for silicone fluid and fragrance oil blend formulation (% of panel) |
A vs. 1 |
A |
13 |
61 % |
1 |
20 |
B vs. 2 |
B |
12 |
64 % |
2 |
21 |
C vs. 3 |
C |
13 |
61 % |
3 |
20 |
D vs. 4 |
D |
11 |
67 % |
4 |
22 |
[0075] The results show that in every case the towels with the silicone emulsion and fragrance
premixed are selected as more intense smelling by significantly more panellists than
the non-premixed composition. This is despite the fact that the compositions contain
the same quantity of fragrance.