CN108350391B

CN108350391B - Compositions and methods for treating substrates

Info

Publication number: CN108350391B
Application number: CN201680061265.XA
Authority: CN
Inventors: P·巴格; P·鲍尔; A·萨卡
Original assignee: Unilever NV
Current assignee: Unilever IP Holdings BV
Priority date: 2015-10-20
Filing date: 2016-10-03
Publication date: 2020-09-08
Anticipated expiration: 2036-10-03
Also published as: AR106389A1; WO2017067772A1; EP3365416A1; EP3365416B1; BR112018007652A2; CL2018000985A1; TR201906872T4; ES2740643T3; ZA201802090B; CN108350391A

Abstract

The present invention relates to compositions and methods for treating substrates such as fabrics; in particular to compositions and methods for removing stains in all types of stains. A single product that works in all different types of stains remains desirable. It is an object of the present invention to provide compositions for the removal of aqueous/bleachable, oily, particulate and enzymatic stains. Surprisingly, it has been found that the removal of aqueous/bleachable, oily, particulate and enzymatic stains from fabrics can be achieved by a composition comprising a surfactant system comprising an anionic surfactant selected from alkyl alkoxylated sulfates and a dianionic surfactant selected from diphenyl oxide disulfonates having a carbon chain length of C6 to C18, a fat solubilizing oil and hydrogen peroxide.

Description

Compositions and methods for treating substrates

Technical Field

The present invention relates to compositions and methods for treating substrates such as fabrics; in particular to compositions and methods for removing stains in all types of stains.

Background

Fabric stains range from food spills to everyday substances and can be of different types; primarily aqueous, oily, particulate and bleachable. Stains are something people try to avoid, but they are inevitable. However, people still prefer to wear clothes that have less or no stains at all. In fact, people prefer to avoid stains not only on clothes, but also in kitchens, bathrooms and various everyday surfaces in general.

Therefore, improved stain removal is one of the constant goals of the detergent industry. There is always an interest in improving the stain removal, especially on fabric stains. Products that target stain removal typically target no more than two or three types of stains. In fact, a single product that works in all different types of stains remains desirable.

WO98/00498A1(Procter and Gamble Company) discloses liquid cleansing compositions and shampoos based on dianionic surfactants in combination with one or more co-surfactants. The dianionic surfactant may be alkoxylated, having at least five carbon atoms to which two anionic substituents separated by at least three carbon atoms are attached. Also, of the two anionic substituents, one group is a sulfate or alkoxy-linked sulfate and the other anionic substituent may be a sulfate or sulfonate.

WO98/00503A1(Procter and Gamble Company) also discloses similar cleaning compositions based on the dianionic surfactants (0.1 to 50% by weight) disclosed in WO98/00498 in combination with bleaching agents (0.1 to 50% by weight), such as perborates and/or percarbonates.

US2006/100122A1(Diversey Inc) discloses cleaning and disinfecting compositions for hard surfaces. The composition comprises hydrogen peroxide and an antioxidant acid other than phosphorus-based acid or a salt thereof. The replacement of phosphorous-based acids with acids results in improved hydrogen peroxide stability while maintaining or increasing the cleaning efficacy and antimicrobial activity of the composition.

WO2013/075913a1(Unilever) discloses liquid crystalline ternary lamellar phase detergent compositions for laundry and/or daily cleaning. It was found a detergent composition comprising a surfactant selected from the group consisting of nonionic surfactants and anionic surfactants in a ratio of nonionic surfactant to anionic surfactant of from 5:1 to 1: 1; having a fat solubilizing oil (fat solubilizing oil) and water provides an effective solution for removing soils and/or stains from solid or solidified fatty materials; are stable under normal storage and washing conditions and can be delivered as a pourable liquid.

WO2014/016134a1(Unilever) discloses liquid crystalline ternary lamellar phase detergent compositions comprising a surfactant selected from nonionic and anionic surfactants in a ratio of nonionic to anionic surfactant of from 3:1 to 1:4, having an HLB value of not less than 15; fat-solubilizing oil and water. The compositions are stable under normal storage and wash conditions and can be delivered as pourable liquids.

However, a single detergent composition that can target a wide range of stains remains desirable.

It is therefore an object of the present invention to provide compositions for the removal of aqueous/bleachable, oily, particulate and enzymatic stains.

It is another object of the present invention to provide a single product that works in different types of stains.

It is a further object of the present invention to provide a laundry pretreatment composition for stain removal.

Surprisingly, it has been found that the removal of aqueous/bleachable, oily, particulate and enzymatic stains from fabrics can be achieved by a composition comprising a surfactant system comprising an anionic surfactant and a di-anionic surfactant, a fat solubilizing oil and hydrogen peroxide.

Disclosure of Invention

Accordingly, in a first aspect, the present invention provides a composition for treating a substrate, the composition comprising: 10 to 25 wt% of a surfactant system comprising an anionic surfactant and a dianionic surfactant, wherein the anionic surfactant is selected from alkyl alkoxylated sulfates and the dianionic surfactant is selected from diphenyl oxide disulfonates having a carbon chain length of C6 to C18; 1 to 15 wt.% of a fat-solubilizing oil having 14 to 22MPa^0.5(at 25 ℃) of Hansen Solubility Parameters (HSP) wherein the Hansen polar component (P) is 0.5 to 10MPa^0.5(at 25 ℃) a dispersion component (H) of 3 to 10MPa^0.5(at 25 ℃) the hydrogen bond component (D) is in the range of 13 to 18MPa^0.5(at 25 ℃); 2 to 12 weight percent hydrogen peroxide; and water.

In a second aspect, the present invention provides a method for treating a substrate comprising the sequential steps of: applying a composition according to the invention to the substrate; washing the substrate with a detergent; and drying the substrate.

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

These and other aspects, features and advantages will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the invention may be used in any other aspect of the invention. The word "comprising" is intended to mean "including", but not necessarily "consisting of. In other words, the listed steps or options need not be exhaustive. It should be noted that the examples given in the following description are intended to illustrate the present invention, and are not intended to limit the present invention to these examples per se. Similarly, all percentages are weight/weight percentages unless otherwise indicated. Except in the working and comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and/or use are to be understood as modified by the word "about". Numerical ranges expressed in the form of "x to y" are understood to include x and y. When multiple preferred ranges are described in the form of "x to y" for a particular feature, it is to be understood that all ranges combining the different endpoints are also contemplated.

Detailed Description

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

Surfactant system

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

A particularly preferred anionic surfactant is Sodium Lauryl Ether Sulfate (SLES), preferably having from 2 to 30 ethylene oxide groups and from about 8 to 18 carbon atoms in the alkyl group.

The dianionic surfactant is selected from diphenyl oxide disulfonates having a carbon chain length of C6 to C18.

Non-limiting examples of dianionic surfactants include surfactants selected from the group consisting of diphenyloxide disulfonates having carbon chain lengths of C6 to C18, preferably C8 to C16, more preferably C10 to C14. A commercially available example is

8390 (from Dow).

In the compositions of the present invention, the surfactant system is present at a concentration of from 10 to 25%, preferably at least 12%, more preferably at least 15%, still more preferably at least 17%, but generally not more than 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 from 4:1 to 20:1, preferably in a ratio of from 4:1 to 19:1, more preferably in a ratio of from 5:1 to 15:1, and still more preferably in a ratio of from 7:1 to 10: 1.

Fat solubilizing oil

The composition of the invention comprises a fat-solubilising oil having a pressure of from 14 to 22MPa^0.5(at 25 ℃) of the Hansen Solubility Parameter (HSP) wherein the Hansen polar component (P) is between 0.5 and 10MPa^0.5(at 25 ℃) the dispersion fraction (H) is from 3 to 10MPa^0.5(at 25 ℃) a hydrogen bonding component (D) of 13 to 18MPa^0.5(at 25 ℃).

The Hansen solubility parameter is preferably calculated using software known as HSPiP version 3.1 (http:// HSPiP. software. info. com/3.1 /). The Input to the software is in the form of SMILES (simplified Molecular Input Line Entry specification) of the proposed oil structure.

Preferred fat solubilizers are esters of fatty acids having the general formula RCOOR', wherein R is a C length₆To C₁₄Alkyl hydrocarbon chain of (2), R' ═ CH₃(methyl) or C₂H₅(ethyl) group. A 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 compositions of the present invention at a concentration of from 1 to 15%, preferably not more than 12%, still more preferably not more than 10%, even more preferably not more than 8%, but generally 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 having an oxygen-oxygen single bond) and is useful as a strong oxidizing agent, bleaching agent, and disinfectant.

The hydrogen peroxide is present in the compositions of the present invention at a concentration of from 2 to 12%, preferably not more than 10%, more preferably not more than 8%, still more preferably not more than 7%, but generally not less than 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 (W)

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

Optional ingredients

The composition may further comprise a softening agent as is commonly used in fabric softening compositionsThe composition comprises softener, bleach stable enzyme, antimicrobial agent, silicone oil and co-solvent such as 2-phenoxyethanol (as active ingredient)

EP trademarks are commercially available from Dow Chemicals) to improve stability and dispersibility, hydrotropes, preservatives and flavors.

Method for treating a fabric

In a second aspect, the present invention relates to a method for treating a substrate, comprising the sequential steps of: applying the composition according to the invention to a substrate; washing the substrate with a detergent; and drying the substrate.

The composition may be applied by any known method, such as by using a wipe, sprayer, including a spray gun, atomizer, or other direct application.

The surface is preferably rinsed after washing the substrate and before drying.

Use of a composition

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

Product form

The product is typically packaged in bottles, preferably plastic bottles, in a capacity of 250ml to 5L, more preferably 250ml to 1.5L. Common supermarket-sized bottles are 250ml, 500ml, 750ml, 1L and 1.5L. The bottle may optionally have a measuring cup attached, or a measuring scale indicator in the cap, to enable the consumer to administer the appropriate amount.

Also contemplated in the context of the present invention are products packaged in bottles with trigger spray dispensers containing compositions according to the present invention for the purpose of direct application, e.g. directly onto fabrics. Trigger spray dispenser bottles typically have a volume of 250ml to 1.5L. Typical volumes include 400ml, 500ml, 750ml and 1L.

Larger vessels for use on an industrial scale are also included within the scope of the invention.

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

Examples

Material

Anionic surfactant: SLES paste (70%) -sodium lauryl ether sulfate (from Galaxy LES 702 EO)

Dianionic surfactant: diphenyl ether disulfonate 35% solution (from Dow Chemicals)

8390

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

Fat-solubilizing oil: dodecanoic acid methyl ester (from KLK Oleo, Malaysia)

Deionized water:

preparation of the composition:

each ingredient was added in appropriate amounts to a plastic container and Silverson was used^TMAnd mixing by a mixer. The process conditions used were as follows:

the mixer type: silverson ion^TMMixing device

RPM: 1500 to 2500

Mixer blade diameter: 4cm

Mixer blade type: two flat blades 90 degrees attached to SS bar mounted on motor

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

Temperature: 25 deg.C (laboratory temperature)

Stain set

Standard multi-stain monitors purchased from SUV-TUV South East Asia Pvt limited were used. Two types of multi-stain monitors were used in the study, ICSS1 and ICSS 2. Both stain monitors were made from knitted cotton fabric with multiple stains (40 total stains, 4 stain classes: oily/fatty, bleachable, enzymatic, and granular; for ICSS1 and ICSS 2). The staining is performed under controlled and reproducible conditions.

The fabric treatment scheme comprises the following steps:

0.3 to 1.5ml of the composition was applied to each stain by means of a graduated dropper. After 2 to 10 minutes of applying the composition, the treated fabric is washed.

The washing scheme comprises the following steps:

the treated standard soil monitor was washed in a standard 5kg household vertical axis top loading washer. The total wash load was 2.5kg, including both stain surveillance and shirt ballast. Using 60 g

Excel matrix TopLoad (from Hindustan Unilever Ltd, india) was washed at 24 ° FH. A typical wash cycle consists of a soak, a wash and two rinses. After the washing was complete, the samples were removed and then allowed to air dry overnight.

Fabric evaluation:

the efficacy of each composition was evaluated using SRI (stain removal index). Use of

F1(Innotech Scanner) measured the SRI of each stain. SRI values were calculated from L, a, b values of the blank and stained fabrics as follows:

for blank (non-stained) fabrics: l is_B，a_B，b_B

For stained fabrics: l is_S，a_S，b_S

SRI＝100-Delta E

Delta SRI ═ SRI (Expt) -SRI (control)

The higher the Delta SRI value (the more positive), the more effective the formulation is at stain removal.

Experiments were performed with a commercially available stain removing agent as a control. It is within the scope of the present invention to identify compositions that will provide more positive Delta SRI values in all stains than commercially available stain removers.

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

In this example, the compositions according to the invention (Ex 1) were compared with comparative (i.e. outside the invention) compositions (Comp a to Comp F) lacking at least one component of the composition.

Each of the compositions in Table 1 below was treated on various stains and their Delta (. DELTA.) SRI values were calculated. The compositions are prepared by the methods described above.

TABLE 1

Note: the balance of each composition was water.

The results (stain removal expressed as Delta (. DELTA.) SRI) are shown in Table 2.

TABLE 2

Note: MSR means a commercially available stain remover

The above table shows that only in the case of the composition according to the invention (Ex 1) comprising all the components of the composition, excellent stain removal (higher Delta SRI values) was observed in all the different types of stains relative to the control.

Example 2: effect of Hydrogen peroxide concentration on stain removal

This example demonstrates the effect of hydrogen peroxide concentration on stain removal. Example compositions Ex 2 to Ex 4 were compared with comparative examples Comp F to Comp G containing hydrogen peroxide at concentrations outside the scope of the present invention.

Each composition was tested for various stains in Table 3 below and their Delta SRI values were calculated. The compositions are prepared by the methods described above.

TABLE 3

The balance being water.

The observed values ((Delta (. DELTA.) SRI) are shown in Table 4 below.

TABLE 4

The data presented in table 4 show that the best results are obtained when the amount of hydrogen peroxide is within the range of the present invention.

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

In this example, compositions according to the invention (Ex 5 to Ex7) comprising different amounts of fat solubilizing oil were compared with comparative compositions having an amount of fat solubilizing oil outside the scope of the invention, labelled (Comp I to Comp K).

Each of the compositions in Table 5 below was contacted with various stains and the resulting Delta SRI values were calculated. The compositions are prepared by the methods described above.

TABLE 5

The balance of each composition was water.

The observed values ((Delta (. DELTA.) SRI) are shown in Table 6.

TABLE 6

The data in table 6 above indicates optimal stain removal when the amount of fat solubilizing oil is within the scope of the invention.

Example 4: effect of surfactant System concentration on stain removal

This example demonstrates the effect of the concentration of the surfactant system on stain removal. Example compositions Ex 8 and Ex 9 were compared to comparative examples Comp L to Comp N containing surfactant in amounts outside the scope of the present invention.

Each of the compositions in Table 7 was contacted with various stains and their DeltaSRI values were calculated and recorded. The compositions are prepared by the methods described above.

TABLE 7

The balance of each composition was water.

The observed values ((Delta (. DELTA.) SRI) are shown in Table 8.

TABLE 8

It can be concluded from the data presented in the table above that stable compositions with excellent stain removal can be obtained when the surfactant system is according to the present invention.

Example 5: effect of anionic surfactant to dianionic surfactant ratio on stain removal

In this example, different ratios of the amounts of anionic surfactant to dianionic surfactant are compared. Ex 10 to Ex 14 are example compositions according to the invention and they are compared with Comp O and Comp P (comparative examples) having a ratio outside the scope of the invention.

TABLE 9

The balance being water.

Each composition in the table below was treated with various stains and the Delta SRI values were calculated. The compositions are prepared by the methods described above.

The observed values ((Delta (. DELTA.) SRI) are shown in Table 10 below.

Watch 10

Table 10 shows that at the anion to dianion ratio according to the invention, the best stain removal results were obtained.

Claims

1. A composition for treating a substrate comprising:

a)10 to 25 wt% of a surfactant system comprising an anionic surfactant and a dianionic surfactant, wherein the anionic surfactant is selected from alkyl alkoxylated sulfates and the dianionic surfactant is selected from diphenyl oxide disulfonates having a carbon chain length of C6 to C18;

b)1 to 15 wt.% of a fat-solubilizing oil having 14 to 22MPa^0.5(at 25 ℃) of the Hansen Solubility Parameter (HSP) wherein the Hansen polar component (P) is between 0.5 and 10MPa^0.5(at 25 ℃) the dispersion fraction (H) is from 3 to 10MPa^0.5(at 25 ℃) and a hydrogen bonding component (D) of 13 to 18MPa^0.5(at 25 ℃);

c)2 to 12 weight percent hydrogen peroxide; and

d) the amount of water is controlled by the amount of water,

wherein the ratio of the anionic surfactant to the dianionic surfactant is from 4:1 to 20: 1.

2. The composition of claim 1, wherein the HSP is calculated using HSPiP version 3.1 software.

3. The composition of claim 1 or 2, wherein the fat-solubilizing oil is methyl laurate.

4. The composition of claim 1 or 2, comprising 45 to 90 wt% water.

5. A method for treating a substrate comprising the sequential steps of:

a) applying the composition of any one of claims 1 to 4 to the substrate;

b) washing the substrate with a detergent; and the combination of (a) and (b),

c) drying the substrate.

6. Use of a composition according to any one of claims 1 to 4 for removing stains.

7. Use of a composition according to claim 6 for removing aqueous/bleachable, oily, particulate and enzymatic stains from fabrics.