Detailed Description
Definition of the definition
As used herein, the articles "a" and "an" when used in the claims should be understood to mean one or more of the substance that is claimed or described.
As used herein, the terms "comprise/include", "include/include", "contain/contain" and "contain/contain" are not limiting, i.e. other steps and other ingredients may be added that do not affect the result. The above terms encompass the term "by. The composition" and "consists essentially of.
As used herein, when a composition is "substantially free" of a particular ingredient, it means that the composition comprises less than trace amounts, alternatively less than 0.1%, alternatively less than 0.01%, alternatively less than 0.001%, by weight of the composition, of the particular ingredient.
As used herein, the term "laundry detergent composition" refers to a composition for cleaning soiled materials, including fabrics. Such compositions may be used as laundry pretreatments, laundry post-treatments, or may be added during the rinse cycle or wash cycle of a laundry operation. The laundry detergent composition may have a form selected from the group consisting of a liquid, a powder, a unit dose such as a single or multi-compartment unit dose, a pouch, a tablet, a gel, a paste, a stick or a sheet. Preferably, the laundry detergent composition is a liquid or unit dose composition. The term "liquid laundry detergent composition" refers herein to a composition in a form selected from the group consisting of pourable liquids, gels, creams, and combinations thereof. The liquid laundry detergent composition may be aqueous or non-aqueous, and may be anisotropic, isotropic, or a combination thereof. The term "unit dose laundry detergent composition" herein refers to a water-soluble pouch containing a volume of liquid, which is surrounded by a water-soluble film.
As used herein, the term "primary surfactant" refers to a surfactant that is present in a composition in an amount greater than any other surfactant comprised by such a composition. Similarly, the term "primary anionic surfactant" refers to anionic surfactants present in the composition in an amount greater than any other anionic surfactant comprised by such composition.
As used herein, the term "majority surfactant" refers to surfactants present in such compositions at a total surfactant content of at least 50 wt%. Similarly, the term "majority anionic surfactant" refers to anionic surfactants present in such compositions in an amount of at least 50% by weight of the total anionic surfactant content.
As used herein, the term "alkyl" refers to a branched or unbranched, substituted or unsubstituted hydrocarbyl moiety. Included within the term "alkyl" are the alkyl portions of acyl groups.
As used herein, the term "wash solution" refers to a typical amount of aqueous solution for one laundry wash cycle, preferably 1L to 50L, or 1L to 20L for hand washing, and 20L to 50L for machine washing.
As used herein, the term "stained fabric" is used non-specifically and may refer to any type of fabric made from natural or synthetic fibers, including natural, synthetic, and synthetic fibers, such as, but not limited to, cotton, linen, wool, polyester, nylon, silk, acrylic, and the like, as well as various blends and combinations.
Dye fixatives
The dye fixative of the present invention is a cationic polymer. Without being bound by any theory, it is believed that such dye fixatives having a positive charge may bind to a dye having a negative charge through charge interactions, and then prevent the dye from leaving the textile or redeposition on a different colored textile. In particular, the dye fixative may be selected from the reaction products of i) polyamines with cyanamide and organic and/or inorganic acids, ii) cyanamide with aldehydes and ammonium salts, iii) cyanamide with aldehydes and amines, or iv) amines with epichlorohydrin. Preferably, the dye fixative agent may be selected from the reaction products of amines with epichlorohydrin, wherein the amine is a primary, secondary or tertiary amine. More preferably, the dye fixative agent may be selected from the reaction products of dimethylamine and epichlorohydrin. Most preferably, the dye fixative agent may be poly (2-hydroxypropyl dimethyl ammonium chloride), also known as poly (dimethylamine-co-epichlorohydrin), such as a polymer commercially available from Clariant under the trade name TEXCARE DFC (CAS#: 25988-97-0).
The term "amine" includes monoamines and polyamines. Monoamines as used herein may be primary, secondary and tertiary amines. They may be aliphatic amines, such as dialkylamines, especially dimethylamine, cycloaliphatic amines, such as cyclohexylamine, and aromatic amines, such as aniline. However, the amines used herein may also have both aliphatic, cycloaliphatic and aromatic substituents. In addition, heterocyclic compounds, such as pyridine, may also be used. The term "polyamine" herein includes, for example, diamines, triamines, tetramines, and the like, and also includes similar N-alkyl polyamines and N, N-dialkyl polyamines. Examples thereof are ethylenediamine, propylenediamine, butylenediamine, pentylene diamine, hexylenediamine, diethylenetriamine, triethylenetetramine and higher polyamines. Particularly preferred polyamines may be ethylenediamine, diethylenetriamine and dimethylaminopropylamine. Ammonium salts are salts of ammonia, in particular ammonium chloride or the abovementioned amines or polyamines with different mineral or organic acids, or other quaternary ammonium salts.
The cyanamide may be mono-cyanamide or dicyandiamide. Aldehydes as used herein may include, for example, aliphatic aldehydes such as formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, dialdehydes such as glyoxal, unsaturated aldehydes such as acrolein, crotonaldehyde, and aromatic aldehydes such as benzaldehyde. Particularly preferred aldehydes may be aliphatic aldehydes such as formaldehyde.
The dye fixatives used herein may also be homopolymers and copolymers based on diallyldimethyl ammonium chloride (DADMAC). The DADMAC-based copolymers contain other vinyl monomers as other components, such as vinyl imidazole, vinyl pyrrolidone, vinyl alcohol, vinyl acetate, (meth) acrylic acid/esters, acrylamide, styrene sulfonic acid, acrylamide methylpropanesulfonic Acid (AMPS), and the like. Homopolymers based on DADMAC are available under the trade name3954. Dodigen 4033 and GENAMIN PDAC (from Clariant).
Preferably, the dye fixative agents suitable for use in the present disclosure may be selected from reaction products of amines with epichlorohydrin, wherein the amine is a primary, secondary or tertiary amine. More preferably, the dye fixative agents suitable for use in the present invention may be selected from the reaction products of dimethylamine and epichlorohydrin. Most preferably, the dye fixing agent may be poly (2-hydroxypropyl dimethyl ammonium chloride).
In one embodiment, the dye fixative is poly (2-hydroxypropyl dimethyl ammonium chloride) of formula (I):
Wherein n is an integer from 5 to 1000.
The dye fixative in the compositions according to the present disclosure may be present in an amount ranging from 0.02% to 5%, preferably from 0.05% to 2%, more preferably from 0.1% to 1.5%, most preferably from 0.15% to 0.9%, such as 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0% or any range therebetween, by weight of the composition.
Stabilizing agent
Stabilizers suitable for use in the present invention may be crystalline hydroxyl-containing stabilizers.
Preferably, the stabilizer may be selected from microcrystalline cellulose (MCC) or a derivative thereof, castor oil or a derivative thereof, hydrogenated Castor Oil (HCO) or a derivative thereof, and any combination thereof. More preferably, the stabilizer may be microcrystalline cellulose or a derivative thereof and/or hydrogenated castor oil or a derivative thereof.
MCC is a naturally occurring polymer. It consists of glucose units linked by 1-4 beta glycosidic linkages. These linear cellulose chains are bound together in the form of microfibrils that are helically linked together in the plant cell wall. It has been used in food applications and pharmaceutical tablets.
Castor oil may include glycerides, especially triglycerides, comprising C10 to C22 alkyl or alkenyl moieties containing hydroxyl groups. The hydrogenation conversion of castor oil to produce HCO may be used as a double bond in the castor oil-based moiety present in the starting oil to convert the castor oil-based moiety to a saturated hydroxyalkyl moiety, such as hydroxystearyl. In some embodiments, the HCO herein may be selected from the group consisting of glycerol tristearate, glycerol dihydroxystearate, and mixtures thereof. HCO may be treated in any suitable starting form including, but not limited to, those selected from the group consisting of solids, melts, and mixtures thereof.
In some preferred embodiments, the stabilizer is incorporated into the liquid detergent composition by using one or more External Structuring Systems (ESS) comprising the stabilizer. ESS suitable for use in the present invention may comprise (a) a stabilizer, (b) an alkanolamine, such as Monoethanolamine (MEA), and (c) an anionic surfactant, such as Linear Alkylbenzene Sulfonate (LAS), and (d) an additional component.
HCO is typically present in the ESS of the present invention at a level of from about 2% to about 10%, from about 3% to about 8%, or from about 4% to about 6% by weight of the structuring system. In some embodiments, the corresponding percentage of hydrogenated castor oil delivered into the finished laundry detergent product is less than about 1.0%, typically from 0.1% to 0.8%.
Useful HCOs can have a melting point of about 40 ℃ to about 100 ℃, or about 65 ℃ to about 95 ℃, and/or an iodine number ranging from 0 to about 5, 0 to about 4, or 0 to about 2.6. The melting point of HCO can be measured using ASTM D3418 or ISO 11357, both tests using DSC: differential scanning calorimetry.
HCOs used in the present invention include those commercially available. Non-limiting examples of commercially available HCO for use in the present invention include those available from Rheox, incThe source of castor oil for hydrogenation to form HCO may be any suitable source, such as from brazil or india. In one suitable embodiment, the castor oil is hydrogenated using a noble metal, such as a palladium catalyst, and the hydrogenation temperature and pressure are controlled to optimize hydrogenation of the double bonds of the natural castor oil while avoiding unacceptable levels of dehydroxylation.
The stabilizer in the composition according to the present disclosure may be present in an amount ranging from 0.01% to 9%, preferably from 0.02% to 8%, more preferably from 0.03% to 5%, still more preferably from 0.05% to 3%, most preferably from 0.06% to 2%, for example from 0.1%, 0.2%, 0.3%, 0.5%, 0.7%, 1%, 2% or any range therebetween, by weight of the composition.
Amine oxide
The amine oxide suitable for use in the present invention may be selected from the group consisting of C6-C20 alkyl dimethyl Amine Oxides (AO) and combinations thereof.
Preferably, the amine oxide is characterized by the following structure:
Wherein R1 is a C6-20 alkyl, C6-20 hydroxyalkyl, or C6-20 alkylphenyl group, each R2 is a C2-5 alkylene, or C2-5 hydroxyalkylene group, x is from 0 to about 3, and each R3 is a C1-3 alkyl, C1-3 hydroxyalkyl, or polyethylene oxide comprising from about 1 to about 3 Ethyleneoxy (EO) units. Preferably, the amine oxide may be a C8-18 alkyl dimethyl amine oxide, preferably a C10-16 alkyl dimethyl amine oxide.
Preferably, the amine oxide is selected from the group consisting of dodecyl dimethyl amine oxide, tetradecyl dimethyl amine oxide, and combinations thereof. More preferably, the amine oxide comprises dodecyldimethyl amine oxide having the following formula (III):
such compounds are also known as lauryl dimethyl amine oxide or dodecyl dimethyl amine-N-oxide (DDAO). Which can be under the trade nameLO is commercially available from Huntsman.
The amine oxide in the compositions according to the present disclosure may be present in an amount ranging from 0.01% to 10%, preferably from 0.02% to 8%, more preferably from 0.1% to 3%, most preferably from 0.15% to 2%, for example from 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 4%, 5% or any range therebetween, by weight of the composition.
Anionic surfactants
The laundry detergent compositions of the present invention may comprise an anionic surfactant system. In particular, the laundry detergent compositions of the present invention may comprise from 0.1% to 50% by weight of the composition of an anionic surfactant system.
Preferably, the anionic surfactant system may comprise an anionic surfactant selected from the group consisting of C6-C20 Linear Alkylbenzene Sulfonate (LAS), C6-C20 Alkyl Sulfate (AS), C6-C20 Alkyl Alkoxy Sulfate (AAS), C6-C20 Methyl Ester Sulfonate (MES), C6-C20 Alkyl Ether Carboxylate (AEC), and any combination thereof. More preferably, the anionic surfactant system may comprise C6-C20 LAS and optionally additional anionic surfactants such AS C6-C20 AS and/or C6-C20 AAS. In one embodiment, the LAS is a C10-C16 LAS, preferably a C12-C14 LAS.
LAS is typically prepared by sulfonating (using SO2 and SO3) alkylbenzenes followed by neutralization. Suitable alkylbenzene feedstocks can be prepared from olefins, paraffins, or mixtures thereof using any suitable alkylation scheme, including sulfuric acid and HF-based processes. By varying the exact alkylation catalyst, it is possible to vary the position of the covalent attachment of benzene to the aliphatic hydrocarbon chain to a large extent. Thus, the 2-phenyl isomer and/or internal isomer content of LAS herein may vary widely.
In some embodiments of the laundry detergent composition, C6-C20 LAS may be present in an amount ranging from 1% to 100%, preferably from 10% to 99%, more preferably from 20% to 95%, most preferably from 30% to 90%, for example 40%, 50%, 60%, 70%, 80%, 90% or any range therebetween, by weight of the anionic surfactant.
In some embodiments of laundry detergent compositions, the level of LAS is preferably higher than the level of any other anionic surfactant comprised by such compositions, i.e., LAS is the primary anionic surfactant in such compositions.
Anionic surfactants suitable for use in the present disclosure may also include C6-C20 Alkyl Sulfate (AS), C6-C20 Alkyl Alkoxy Sulfate (AAS), C6-C20 Methyl Ester Sulfonate (MES), C6-C20 Alkyl Ether Carboxylate (AEC), or any combination thereof. For example, the laundry detergent composition may comprise a C6-C20 alkyl alkoxy sulfate (AAx S), wherein x is from about 1 to about 30, preferably from about 1 to about 15, more preferably from about 1 to about 10, and most preferably x is from about 1 to about 3. The alkyl chain in such AAx S may be straight or branched, with mid-chain branched AAx S surfactants being particularly preferred. Preferred AAx S groups include C12-C14 alkyl alkoxy sulfates having x of about 1 to 3. The amount of AAx S surfactant in the laundry detergent compositions of the present invention may range from about 0.05% to about 100%, preferably from about 0.1% to about 80%, more preferably from about 0.5% to about 50%, most preferably from about 1% to about 30%, for example 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% or any range therebetween, by weight of the composition.
In some embodiments, the weight ratio of LAS to AAx S is at least 0.6, preferably at least 0.8, more preferably at least 0.9, most preferably at least 1, such as 0.6, 0.7, 0.8, 0.9, 1, 1.2, 1.5, 2, 2.5, 3, 4, 5, 8, 10, or any range therebetween.
The anionic surfactant system in the compositions according to the present disclosure may be present in an amount ranging from 0.1% to 45%, preferably from 0.5% to 40%, more preferably from 1% to 35%, most preferably from 2% to 30%, for example from 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% or any range therebetween, by weight of the composition.
In some embodiments of the present disclosure, the anionic surfactant in the compositions according to the present disclosure may comprise less than 30%, preferably less than 20%, more preferably less than 10%, most preferably less than 5% soap by weight of anionic surfactant.
Nonionic surfactant (NI)
The laundry detergent compositions of the present invention may comprise a nonionic surfactant system. The nonionic surfactant system can comprise a nonionic surfactant selected from the group consisting of alkyl alkoxylated alcohols, alkyl alkoxylated phenols, alkyl polysaccharides, polyhydroxy fatty acid amides, alkoxylated fatty acid esters, alkyl Polyglycosides (APGs), methyl Ester Ethoxylates (MEEs), sucrose esters, sorbitan esters, and alkoxylated derivatives of sorbitan esters, and any combination thereof. Preferably, the nonionic surfactant system can comprise a C6-C20 alkoxylated alcohol having a weight average degree of alkoxylation in the range of from 1 to 20, preferably from 5 to 15, more preferably from 7 to 10. More preferably, the nonionic surfactant system can comprise a C8-C18 ethoxylated alcohol having a weight average degree of ethoxylation in the range of from 1 to 20, preferably from 5 to 15, more preferably from 7 to 10.
Non-limiting examples of nonionic surfactants suitable for use herein include C12-C18 alkyl ethoxylates such as C12-C14 alkyl ethoxylates having EO of 7-9, available from ShellNonionic surfactants, C6-C12 alkylphenol alkoxylates in which the alkoxylate units are mixtures of ethyleneoxy and propyleneoxy units, condensates of C12-C18 alcohols and C6-C12 alkylphenols with ethylene oxide/propylene oxide block alkyl polyamine ethoxylates, such as those available from BASFC14-C22 mid-chain branched alkyl alkoxylates, BAEx, where x is from about 1 to about 30, alkyl polysaccharides, particularly alkyl polyglycosides, polyhydroxy fatty acid amides, and ether terminated poly (alkoxylated) alcohol surfactants. Also useful herein as nonionic surfactants are alkoxylated ester surfactants such as those having the formula R1C(O)O(R2O)nR3, wherein R1 is selected from a linear or branched C6-C22 alkyl or alkylene moiety, R2 is selected from C2H4 and C3H6 moieties, and R3 is selected from H, CH3、C2H5 and C3H7 moieties, and n has a value of between about 1 and about 20. Such alkoxylated ester surfactants include aliphatic Methyl Ester Ethoxylates (MEEs) and are well known in the art.
In a specific embodiment, the alkoxylated nonionic surfactant comprised by the laundry detergent compositions of the present invention is a C6-C20 alkoxylated alcohol, preferably a C8-C18 alkoxylated alcohol, more preferably a C10-C16 alkoxylated alcohol. The C6-C20 alkoxylated alcohol is preferably an alkyl alkoxylated alcohol having an average degree of alkoxylation of from about 1 to about 50, preferably from about 3 to about 30, more preferably from about 5 to about 20, even more preferably from about 5 to about 9. The alkoxylation herein may be ethoxylation, propoxylation, or mixtures thereof, but is preferably ethoxylation. In one embodiment, the alkoxylated nonionic surfactant is a C6-C20 ethoxylated alcohol, preferably a C8-C18 alcohol ethoxylated with an average of about 5 to about 20 moles of ethylene oxide, more preferably a C10-C16 alcohol ethoxylated with an average of about 5 to about 9 moles of ethylene oxide. The most preferred alkoxylated nonionic surfactants are C12-C15 alcohols ethoxylated with an average of about 7 moles of ethylene oxide, e.g., commercially available from Shell25-7。
The nonionic surfactant system in the compositions according to the present disclosure may be present in an amount ranging from 1% to 45%, preferably from 2% to 40%, more preferably from 3% to 35%, most preferably from 4% to 30%, for example 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 20%, 25%, 30% or any range therebetween, by weight of the composition.
In some embodiments, the weight ratio of nonionic surfactant system to anionic surfactant system is between 1.5 and 20, preferably between 1.7 and 15, more preferably between 1.9 and 10, and most preferably between 2 and 8, such as 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.5, 3,4, 5, 6, 7, 8, 9, 10 and any range therebetween.
Other ingredients
The laundry detergent compositions according to the present disclosure may further comprise from 0.01% to 10%, preferably from 0.1% to 5%, more preferably from 0.2% to 3%, most preferably from 0.3% to 2% by weight of the composition of a surfactant boosting polymer, preferably a polyvinyl acetate grafted polyethylene oxide copolymer.
The laundry detergent compositions of the present invention may also comprise cationic surfactants. Non-limiting examples of cationic surfactants include quaternary ammonium surfactants, which may have up to 26 carbon atoms, including Alkoxylated Quaternary Ammonium (AQA) surfactants, dimethylhydroxyethyl quaternary ammonium, dimethylhydroxyethyl lauryl ammonium chloride, polyamine cationic surfactants, and amino surfactants, particularly amidopropyl dimethyl amine (APA).
The laundry detergent compositions herein may comprise adjunct ingredients. Suitable adjunct materials include, but are not limited to, builders, chelating agents, rheology modifiers, dye transfer inhibiting agents, dispersants, enzymes, and enzyme stabilizers, catalytic materials, bleach activators, hydrogen peroxide, sources of hydrogen peroxide, preformed peracids, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, photobleaches, perfumes, perfume microcapsules, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids, solvents, toners, structurants and/or pigments. The exact nature of these adjunct ingredients and their content in the laundry detergent composition will depend on the physical form of the composition and the nature of the cleaning operation to be performed using it.
In some embodiments, laundry detergent compositions according to the present disclosure may further comprise from 0.01% to 10%, preferably from 0.1% to 5%, more preferably from 0.2% to 3%, most preferably from 0.3% to 2% fatty acids by weight of the composition.
Preparation of the composition
The laundry detergent compositions of the present invention are typically prepared by conventional methods, such as methods of preparing laundry detergent compositions known in the art. Such methods generally involve mixing the essential and optional ingredients in any desired order to a relatively homogeneous state, with or without heating, cooling, application of vacuum, and the like, to provide a laundry detergent composition comprising the ingredients in the requisite concentrations.
Application method
Another aspect of the invention relates to a method of treating fabrics with a laundry detergent composition. Such methods can deliver color protection benefits. The method comprises the step of applying 5g to 120g of the laundry detergent composition described above to a laundry tub comprising water to form a wash solution. The wash solution in the laundry wash basin herein preferably has a volume of 1L to 50L, or 1L to 20L for hand washing and 20L to 50L for machine washing. The temperature of the laundry solution is preferably in the range of 5 ℃ to 60 ℃.
The dosage in the methods herein may vary depending on the type of wash. In one embodiment, the method comprises applying about 5g to about 60g of the laundry detergent composition to a hand basin (e.g., about 2-4L). In alternative embodiments, the method comprises applying from about 5g to about 100g, preferably from about 10g to about 65g, of the laundry detergent composition to a washing machine (e.g., about 30-45L).
Test method
Test 1 stability test
Stability testing was performed by visual inspection as follows:
1) Preparing a sample of the liquid composition to be tested by mixing the ingredients in a 30ml transparent glass bottle;
2) Storing the samples prepared in step 1) at different temperatures (5 ℃ or 40 ℃) for a certain time (1 week, 2 weeks or 4 weeks), or subjecting the samples prepared in step 1) to freeze/thaw (-18 ℃ and 15 ℃) cycles (1, 2 or 3 cycles) (if more than 1 cycle, repeated) by freezing the samples in a refrigerator (-18 ℃) for 24 hours and then thawing the samples in a container (15 ℃) for 24 hours;
3) After step 2) the samples were visually inspected to determine if they were still a homogeneous system. Any phase separation, such as formation of a separate layer or flocculation, is determined to be "off-spec". If there is no phase separation, it is determined to be "acceptable".
Test 2 dye bleeding test
Dye bleed test was performed using Tergotometer (model: RHLQ V, available from Research Institute of DAILY CHEMICAL Industry (RIDCI)) as follows:
1) About 1.0g of test fabric (ASIE-130 or ASIE-133) per piece was cut out for each tube of tergotometer;
2) 1L of Reverse Osmosis (RO) water having a water hardness level of about 9gpg (wherein the weight ratio of Ca2+ to Mg2+ is about 4:1) was added and heated to 40℃with a water bath;
3) Dissolving about 2.0 grams of the sample liquid detergent composition to form a detergent liquid having a detergent dosage of about 2000 ppm;
4) Adjusting the pH of the solution to about 8.5;
5) About 30ml of the solution was removed to measure pre-wash L/a/b (by using a 5cm x 1cm sample cell, measured with an UltraScan VIS (available from HunterLab, virginia, USA);
6) A piece of 1.0g of test fabric was added to each tube and washed for about 20 minutes;
7) Withdrawing about 30ml of the solution under the same conditions as in step 5) to measure L/a/b, and
8) Delta E was calculated based on measurements before and after washing, higher delta E indicating more severe dye bleed.
Examples
Example 1 stability of liquid laundry detergent composition comprising dye fixative
A liquid laundry detergent composition comprising a dye fixative agent was prepared, comprising the following ingredients as shown in table 1.
TABLE 1
1 Dye fixative Poly (2-hydroxypropyl dimethyl ammonium chloride), commercially available from Clariant under the trade name TEXCARE DFC.
Samples 1 to 6 and a control (i.e., comparative sample 1) were then prepared by adding different stabilizers to the liquid laundry detergent compositions shown in table 1 containing the dye fixative, wherein Hydrogenated Castor Oil (HCO), microcrystalline cellulose (MCC), carboxymethyl cellulose (CMC), starch, alcohol ethoxylate and polymeric thickener were tested as stabilizers and no stabilizers were added for the control. The stability of these samples in each case (i.e. stored at 5 ℃ or 40 ℃ for 2 weeks or frozen/thawed (F/T) 1 or 2 cycles at-18 ℃/15 ℃) was determined according to the test 1: stability test described above. The stability results of these samples are shown in table 2. Surprisingly, only HCO and MCC can stabilize liquid laundry detergent compositions comprising dye fixatives, i.e. pass all stability tests.
TABLE 2
1 HCO, commercially available from Nidera BV
2 MCC from CP Kelco
3 CMC, commercially available from UGUR SELULOZ KIMYA
4 Starch, available from Tianjin Zhiyuan
5 Lutensol XP from BASF
6 ACUSOLTM 845 from Dow
Example 2 color protection by laundry detergent compositions comprising dye fixatives
A sample liquid laundry detergent composition (sample 7) containing a dye fixative and a control (comparative sample 2, a chinese national standard liquid detergent) containing no dye fixative were prepared, comprising the following ingredients.
TABLE 3 Table 3
1 Dye fixative Poly (2-hydroxypropyl dimethyl ammonium chloride), commercially available from Clariant under the trade name TEXCARE DFC.
2 HCO, commercially available from Nidera BV
The Δe of these samples was measured as a measurement of dye bleeding according to test 2 (dye bleeding test, in which a fabric colored with blue dye (ASIE-133) was used) as described above. Higher Δe indicates more severe dye bleed, while lower Δe indicates more effective color protection. The results are shown in the table above, indicating that the laundry detergent composition comprising the color fixative shows excellent color protection performance (0.85 versus 1.4) compared to comparative sample 2 without the color fixative.
In addition, another sample liquid laundry detergent composition comprising a dye fixative (sample 8) and a control comprising a similar surfactant system but no color fixative (comparative sample 3) were prepared, comprising the following ingredients.
TABLE 4 Table 4
1 Dye fixative Poly (2-hydroxypropyl dimethyl ammonium chloride), commercially available from Clariant under the trade name TEXCARE DFC.
According to test 2 as described above, a dye bleed test was used in which a fabric coloured by a blue dye (ASIE-133). The results show that laundry detergent compositions comprising a color fixative exhibit significantly better performance in terms of color protection (0.63 versus 1.09) than comparative samples comprising a similar surfactant system but no color fixative.
Example 3 exemplary formulation of liquid laundry detergent composition comprising dye fixative
The following liquid laundry detergent compositions shown in table 5 were prepared, comprising the listed ingredients in the listed proportions (wt.%).
TABLE 5
1 Dye fixative Poly (2-hydroxypropyl dimethyl ammonium chloride), commercially available from Clariant under the trade name TEXCARE DFC 6
Example 4 exemplary formulation of a Unit dose laundry detergent composition comprising a dye fixative
Exemplary formulations for unit dose laundry detergents shown in table 6 were prepared. These compositions are encapsulated in unit dose compartments by using a polyvinyl alcohol based film.
TABLE 6
1 Dye fixative Poly (2-hydroxypropyl dimethyl ammonium chloride), commercially available from Clariant under the trade name TEXCARE DFC 6
The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Rather, unless otherwise indicated, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40mm" is intended to mean "about 40mm".
Each of the documents cited herein, including any cross-referenced or related patent or patent application, and any patent application or patent for which the present application claims priority or benefit from, is hereby incorporated by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to the present application, or that it is not entitled to any disclosed or claimed herein, or that it is prior art with respect to itself or any combination of one or more of these references. Furthermore, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.
While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.