ES2740643T3 - Composition and method for treating substrates - Google Patents

Abstract

Composition for treating a substrate comprising: a) 10 to 25% by weight of a surfactant system comprising an anionic surfactant and a dianionic surfactant wherein said anionic surfactant is selected from the group of alkoxylated alkyl sulfates and said dianionic surfactant is selected from the diphenyl oxide disulfonate group having a carbon chain length ranging from C6 to C18; b) from 1 to 15% by weight of a fat solubilizing oil, having a solubility parameter of 10 Hansen (dHSP) ranging from 14 to 22 MPa0.5 (at 25 ° C), and in which the component Hansen's polar (δP) is in the range of 0.5 to 10 MPa0.5 (at 25 ° C), the dispersion component (δH) is in the range of 3 to 10 MPa0.5 (at 25 ° C) and the hydrogen bonding component (δD) is in the range of 13 to 18 MPa0.5 (at 25 ° C); c) from 2 to 12% by weight of hydrogen peroxide; and d) water.

Description

DESCRIPTION

Composition and method for treating substrates

Field of the Invention

The present invention relates to a composition and a method for treating substrates, such as fabrics, in particular, for the removal of all types of stains.

Background of the invention

Tissue stains cover the entire spectrum from food spills to household substances and can be of different types, mainly, watery, oily, particulate and bleachable. Stains are something that people try to avoid, but they are inevitable. However, people prefer to wear clothing with less stains or without any stains. In fact, people prefer to avoid stains, not only on clothing, but, in general, in kitchens, bathrooms and also on various domestic surfaces. Therefore, one of the constant objectives of the detergent industry is the improved removal of stains. There is always an interest in improving the detergent effect, especially on tissue stains. Products that are aimed at removing stains usually treat no more than two or three types of stains. In fact, a single product that works for all types of different stains is still desired.

WO 98/00498 A1 (The Procter & Gamble Company) discloses liquid cleaning compositions and shampoos based on a dianionic surfactant in combination with one or more co-surfactants. The dianionic surfactant can be alkoxylated, having at least five carbon atoms to which two anionic substituent groups separated by at least three carbon atoms are attached. Also, between the two anionic substituents, one group is a sulfate or an alkoxy bonded sulfate and the other anionic substituent can be sulfate or sulphonate.

WO 98/00503 A1 (The Procter & Gamble Company) also discloses a similar cleaning composition based on dianionic surfactants (0.1 to 50% by weight) disclosed in WO 98/00498 in combination with bleaching agents (0.1 to 50% by weight) such as perborates and / or percarbonates.

US 2006/100122 A1 (Diversey Inc) discloses cleaning and disinfectant compositions for hard surfaces. The compositions include hydrogen peroxide and an acid or salt thereof that is resistant to oxidation other than phosphorus-based acids. The substitution of phosphorus-based acids with acids results in the improved stability of hydrogen peroxide while maintaining or increasing the efficacy of the cleaning and antimicrobial activity of the compositions.

WO 2013/075913 A1 (Unilever) discloses ternary laminar phase liquid crystal detergent compositions for use in laundry and / or household cleaning. It has been found that a detergent composition comprising a surfactant selected from nonionic and anionic surfactants at a ratio of nonionic surfactant: anionic surfactant between 5: 1 and 1: 1; having a fat and water solubilizing oil provides an effective solution that removes dirt and / or stains from solid or solidified fatty material; It is stable under normal conditions of storage and washing and can be distributed as a pourable liquid. WO 2014/016134 A1 (Unilever) discloses liquid crystal ternary laminar phase detergent compositions comprising a surfactant selected from non-ionic and anionic in a non-ionic: anionic ratio between 3: 1 and 1: 4 and which It has an HBL value of not less than 15; a fat and water solubilizing oil. The composition is stable under normal conditions of storage and washing and can be distributed as a pourable liquid.

However, a single detergent composition that can treat a wide range of stains is still desired.

Therefore, it is an object of the present invention to provide a composition for the removal of aqueous / bleachable, oily, particulate and enzymatic stains.

Another object of the present invention is to provide a single product that works for different types of stains.

Still another object of the invention is to provide a laundry pretreatment composition for stain removal.

Surprisingly, it has been found that the removal of aqueous / bleachable, oily, particulate stains and enzymatic tissue can be achieved through a composition comprising a surfactant system composed of anionic and dianionic surfactants, a fat-solubilizing oil and hydrogen peroxide.

Summary of the invention

Accordingly, in a first aspect, the invention provides a composition for treating a substrate, said composition comprises: from 10 to 25% by weight of a surfactant system comprising an anionic surfactant and a dianionic surfactant wherein said anionic surfactant is selected from the group of alkoxylated alkyl sulfates and said dianionic surfactant is selected from the group of diphenyl oxide disulfonate having a carbon chain length ranging from C6 to C18, from 1 to 15% by weight of a fat solubilizing oil, which has a Hansen solubility parameter ( ⁸ HSP) that ranges between 14 and 22 MPa05 (at 25 ° C), and in which the Hansen polar component ( ⁸ P) is in the range of 0.5 to 10 MPa05 (a 25 ° C), the dispersion component ( ⁸ H) is in the range of 3 to 10 MPa05 (at 25 ° C) and the hydrogen bonding component ( ⁸ D) is in the range of 13 to 18 MPa05 (a 25 ° C), from 2 to 12% by weight of hydrogen peroxide and water.

In a second aspect, the invention provides a method for treating a substrate comprising the successive steps of: applying the composition according to the invention on the substrate, washing the substrate with a detergent and allowing the substrate to dry.

In a third aspect, the invention provides the use of the composition according to the invention for superior stain removal.

These and other aspects, features and advantages will be obvious to those skilled in the art after reading the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the present invention can be used in any other aspect of the invention. It is desired that the term "comprising" means "including", but not necessarily "consisting of" or "composed of". In other words, the stages or options listed need not be exhaustive. It is noted that the examples given in the following description are desired to clarify the invention and not to limit the invention to those particular examples. Similarly, all percentages are weight / weight percentages unless otherwise indicated. Except in the operational and comparative examples, or when explicitly stated otherwise, it is understood that all numbers in this description that indicate amounts of material or reaction conditions, physical properties of materials and / or use are modified by the word “approximately " It is understood that the numerical ranges expressed in the form "from x to y" include x and y. When multiple preferred ranges are described for the specific characteristic in the "from x to y" format, it is understood that all ranges that combine the different endpoints are also contemplated.

Detailed description of the invention

The present invention provides a composition for treating a substrate, which comprises a surfactant system comprising an anionic surfactant and a dianionic surfactant, a fat solubilizing oil and a hydrogen peroxide. The rest of the composition is completed up to 100% by weight with water.

Surfactant system

The composition of the present invention comprises a surfactant system essentially comprising an anionic surfactant and a dianionic surfactant wherein the anionic surfactant is selected from the group of alkoxylated alkyl sulfates and said dianionic surfactant is selected from the group of diphenyl oxide disulfonate having a carbon chain length ranging from C6 to C18.

The particularly preferred anionic surfactant is sodium lauryl ether sulfate (SLES), which preferably has 2 to 30 ethylene oxide groups and about 8 to 18 carbon atoms in the alkyl group.

The dianionic surfactants are chosen from the diphenyl oxide disulfonate group having a carbon chain length ranging from C6 to C18.

Non-limiting examples of dianionic surfactants include surfactants chosen from the diphenyl oxide disulfonate group having a carbon chain length ranging from C6 to C18, preferably from C8 to C16, more preferably from C10 to C14. A commercially available example is Dowfax® 8390 (from Dow).

In the composition of the present invention, the surfactant system is present in a concentration of 10 to 25%, preferably at least 12%, more preferably at least 15%, even more preferably at least 17%, but usually no more 24%, preferably not more than 22%, more preferably not more than 20% by weight of the composition.

The anionic surfactant and the dianionic surfactant are present in the surfactant system in a ratio of 4: 1 to 20: 1, preferably in a ratio of 4: 1 to 19: 1, more preferably in a ratio of 5: 1 to 15: 1, more preferably even in the ratio of 7: 1 to 10: 1.

Fat solubilizing oil

The composition of the present invention comprises a fat solubilizing oil having a Hansen solubility parameter (8HSP) ranging from 14 to 22 MPa05 (at 25 ° C), and in which the Hansen polar component (8P) is in the range of 0.5 to 10 MPa05 (at 25 ° C), the dispersion component (8H) is in the range of 3 to 10 MPa05 (at 25 ° C) and the hydrogen bonding component (8D) is in the range of 13 to 18 MPa05 (at 25 ° C).

The Hansen solubility parameter is preferably calculated using software called HSPiP Version 3.1 (http://hspip.software.informer.com/3.1/). The input introduced to the software is in the form of SMILES (simplified molecular linear introduction specification) of the proposed oil structure. The preferred fat solubilizer is an ester of a fatty acid having the general formula RCOOR ', where R is an alkyl hydrocarbon of chain length ranging from C6 to C ¹⁴ and R' = group CH ³ (methyl) or C ² H ⁵ (ethyl). The particularly preferred fat solubilizing oil is methyl laurate. Another preferred oil is methyl octanoate or methyl dodecanoate.

The fat solubilizing oil is present in the composition of the present invention in a concentration of 1 to 15%, preferably, not more than 12%, more preferably still, not more than 10%, even more preferably not more than 8%, but usually not less than 1.5%, preferably not less than 3%, more preferably not less than 6% by weight of the composition.

Hydrogen peroxide

The composition of the present invention comprises hydrogen peroxide. Hydrogen peroxide is the simplest peroxide (a compound with a simple oxygen-oxygen bond) and is used as a powerful oxidant, bleaching agent and disinfectant.

Hydrogen peroxide is present in the composition of the present invention in a concentration of 2 to 12%, preferably not more than 10%, more preferably not more than 8%, more preferably not more than 7%, but usually not less 3%, preferably, not less than 4%, more preferably not less than 5% by weight of the composition.

Without wishing to be bound by theory, it is believed that hydrogen peroxide acts as an oxidizing agent in the composition and is primarily responsible for the bleaching action, but the superior removal of other stains is achieved by the synergistic effect of hydrogen peroxide in combination. with the fat solubilizing oil.

Water

The composition of the present invention is an aqueous composition comprising water. The composition is completed up to 100% by adding water. The composition preferably comprises 45 to 90% by weight of water.

Optional components

The composition may also comprise softening agents such as those commonly used in fabric softening compositions, bleaching stable enzymes, antimicrobial agents, silicone oils and cosolvents such as 2-phenoxyethanol (commercially available from Dow Chemicals as Dowanol® EP - commercial brand) to improve stability and dispersibility, hydrotropes, preservatives and fragrance.

Process to treat a tissue

In a second aspect, the invention relates to a method for treating a substrate comprising the successive steps of applying the composition according to the invention on a substrate, washing the substrate with a detergent and allowing the substrate to dry.

The composition can be applied through any known method such as using cloths, spraying, including spray guns, atomizers, or other direct application.

It is preferred that the surface be rinsed after washing the substrate and before drying.

Use of the composition

In a third aspect, the invention relates to the use of the composition according to the invention for superior stain removal.

Product form

The product is normally packaged in a bottle, preferably a plastic bottle at volumes between 250 ml and 5 l, more preferably, between 250 ml and 1.5 l. The common supermarket size bottles are 250 ml, 500 ml, 750 ml, 1 l and 1.5 l. The bottles may optionally have an added measuring cup, or an indicator with graduated scale on the lid, to allow the consumer to dose the correct amount.

A product packaged in a bottle with a trigger spray dispenser comprising the composition according to the invention is also considered in the context of the present invention. Trigger spray dispensing bottles normally have a volume of between 250 ml and 1.5 l. Common volumes include 400 ml, 500 ml, 750 ml and 1 l. Larger containers for industrial scale use are also included within the scope of this invention.

The invention will now be illustrated by means of the following non-limiting examples.

Examples

materials

Anionic surfactant: SLES paste (70%) - sodium lauryl ether sulfate (from Galaxy LES 702EO) Dianionic surfactant: 35% diphenyl oxide disulfonate solution (from Dow Chemicals)

DOWFAX® 8390

Hydrogen peroxide: hydrogen peroxide-30% solution (from Merck India)

Fat solubilizing oil: methyl dodecanoate (from KLK Oleo, Malaysia)

Deionized water:

Composition Preparation

Each component was added to a plastic container in the appropriate amount and mixed using a Silversion ™ Mixer. The process conditions used were the following:

Mixer Type: Silversion ™ Mixer

RPM: 1500 to 2500

Mixer blade diameter: 4 cm

Mixer blade type: two flat 90 degree blades attached to a stainless steel rod that was attached to the engine

Mixing time: 30 minutes for a batch size of 1 kg

Temperature: 25 ° C (laboratory temperature)

Stain Sets

Standard multi-spot monitors obtained from SUV-TUV South East Asia Pvt Limited were used. Two types of multi-stained monitors, namely ICSS1 and ICSS2, were used in the study. Both spot monitors were made of a knitted cotton fabric, with multiple spots (in total 40 spots, 4 kinds of spots: oily / greasy, bleachable, enzymatic and particulate; for ICSS1 and ICSS2). The staining was carried out under controlled and repeatable conditions

Tissue Treatment Protocol

0.3 to 1.5 ml of the composition was applied to each stain with the help of a graduated dropper. After 2 to 10 minutes of application of the composition, the treated tissues were washed.

Wash protocol

The treated standard stained monitors were washed in a 5 kg vertical axis top-load home-use washing machine. The total wash load was 2.5 kg, and was composed of both spotted monitors and for ballast shirts. The washing was done with 60 grams of Surf® Excel Matic Top Load (from Hindustan Unilever Ltd., India) at 24 ° FH. A typical wash cycle comprised soaking, washing and two rinses. Once the washing was completed, the fabric samples were removed and then dried on the clothesline overnight.

Tissue evaluation

MRI (stain removal index) was used to assess the effectiveness of each composition. The MRI was measured for each stain using ArtixScan® F1 (Innotech Scanner). MRI values were calculated from L *, a *, b * values of blank and stained tissues as follows:

For blank fabrics (not stained): Lb, aB, bB

For stained fabrics: L ^s , aS, bS

MRI = 100 - Delta E

Delta IRM = IRM (Exp.) - IRM (Control)

The higher (more positive) the Delta IRM value is, the more effective the stain removal formulation is. The experiments were carried out with a stain remover marketed as a control. It is within the scope of the present invention to identify compositions that provide more positive Delta MRI values in all stains compared to the commercial stain remover.

Example 1: effect of each component of the composition on stain removal

In this example, the composition according to the invention (Ex. 1) was compared with the comparative compositions (ie, outside the invention) (from Comp. A to Comp. F) with at least one of the components of the absent composition .

Each of the compositions in Table 1 below was treated in various spots and the Delta ( ^A ) MRI values were calculated. The compositions were prepared by the method as described above.

Table 1

The results (stain removal in terms of Delta ( ^A ) MRI) are shown in tabular form in Table 2.

Table 2

The above table shows that superior stain removal (higher Delta IRM value) is observed above the control in all different types of stains only with the composition according to the invention (Ex. 1) comprising all the components of the composition.

Example 2: Effect of hydrogen peroxide concentration on stain removal

This example demonstrates the effect of hydrogen peroxide concentration on stain removal. The example compositions from Ex. 2 to Ex. 4 were compared with the comparative examples of Comp. F to Comp. G comprising hydrogen peroxide in a concentration outside the scope of the invention.

Each of the compositions in Table 3 below was evaluated against various spots and their Delta MRI values were calculated. The compositions were prepared by the method as described above.

Table 3

The rest is water.

The observations (Delta ( ^A ) MRI) are collected in tabular form below in Table 4.

Table 4

The data presented in Table 4 shows that the best results are obtained when the amount of hydrogen peroxide is within the scope of the present invention.

Example 3: Effect of fat solubilizing oil concentration on stain removal

In this example, compositions according to the invention comprising varying amounts of fat solubilizing oil (from Ex. 5 to Ex. 7) were compared with comparative compositions having the fat solubilizing oil in amounts outside the scope of the present invention labeled as (Comp. 1 to Comp. K).

Each of the compositions in Table 5 below came into contact with various spots and the resulting Delta MRI values were calculated. The compositions were prepared by the method described above.

Table 5

The rest in each composition was water.

The observations (Delta ( ^A ) MRI) are collected in tabular form below in Table 6.

Table 6

The data in Table 6 above indicate optimal stain removal when the concentration of fat solubilizing oil is within the scope of the present invention.

Example 4: effect of surfactant system concentration on stain removal

This example demonstrates the effect of surfactant system concentration on stain removal. Example compositions Ex. 8 and Ex. 9 are compared with comparative examples of Comp. Comp. N comprising surfactants in amounts outside the scope of the invention.

Each of the compositions in Table 7 came into contact with various spots, and their Delta IRM values were calculated and recorded. The compositions were prepared through the method as described above.

Table 7

The rest in each composition was water.

The observations (Delta ( ^A ) MRI) are collected in tabular form below in Table 8.

Table 8

We can infer from the data presented in the previous table that a stable composition with superior stain removal can be obtained when the surfactant system is according to the invention.

Example 5: Effect of the ratio between anionic surfactant and dianionic surfactant in stain removal In this example, different ratios were compared between the amount of anionic surfactant and dianionic surfactant. Ex. 10 through Ex. 14 are example compositions according to the present invention and are compared to Comp. O and Comp. P (comparative examples) that have reasons outside the scope of the present invention.

Table 9

The rest was water.

Each composition in the following table was treated with various spots and Delta MRI values were calculated. The compositions were prepared through the method as described above.

The observations (Delta ( ^A ) MRI) are collected in tabular form below in Table 10.

Table 10

Table 10 indicates that the best results are obtained for the removal of stains at a ratio between anionic surfactant and dianionic surfactant according to the invention.

Claims (8)

i. Composition for treating a substrate comprising: a) 10 to 25% by weight of a surfactant system comprising an anionic surfactant and a dianionic surfactant wherein said anionic surfactant is selected from the group of alkoxylated alkyl sulfates and said dianionic surfactant is selected from the group of diphenyl oxide disulphonate group which it has a carbon chain length that ranges from C6 to C18; b) 1 to 15% by weight of a fat solubilizing oil, which has a Hansen solubility parameter ( ⁸ HSP) ranging from 14 to 22 MPa05 (at 25 ° C), and in which the polar component of Hansen ( ⁸ P) is in the range of 0.5 to 10 MPa05 (at 25 ° C), the dispersion component ( ⁸ H) is in the range of 3 to 10 MPa05 (at 25 ° C) and the component of Hydrogen bond ( ⁸ D) is in the range of 13 to 18 MPa05 (at 25 ° C); c) 2 to 12% by weight of hydrogen peroxide; Y d) water. 2. Composition according to claim 1 wherein the HSP ⁸ is calculated using the HSPiP Version 3.1 software. 3. Composition according to claim 1 or 2 wherein the anionic surfactant and the dianionic surfactant are in a ratio of 4: 1 to 20: 1. 4. Composition according to any one of claims 1 to 3 wherein the fat solubilizing oil is methyl laurate. 5. Composition according to any one of the preceding claims comprising from 45 to 90% by weight of water. 6. Method for treating a substrate comprising the successive stages of: a) applying the composition according to any of claims 1 to 5 on the substrate; b) wash the substrate with a detergent; Y, c) let the substrate dry. 7. Use of the composition according to any of claims 1 to 5 for stain removal. 8. Use of the composition according to claim 7 for the removal of aqueous / bleachable, oily, particulate and enzymatic stains from the tissue.