KR20000016075A - Concentrated alkaline isotropic detergent liquid with bleach - Google Patents

Abstract

PURPOSE: A liquid detergent with hydrogen peroxide bleach for washing a concentrated alkaline isotropic fabric is provided to be formed by 23 % of surfactant and 0.2 wt% of hydrogen peroxide bleach. CONSTITUTION: A concentrated alkaline isotropic fabric washing liquid detergent composition comprising at least 23 % of surfactants and further comprising at least 0.2 % hydrogen peroxide bleach, the composition is substantially free from hydrotropes which cause the pH to reduce and impair the effectiveness of the composition. Also a concentrated alkaline isotropic fabric washing liquid detergent composition comprising at least 15 % by weight of surfactant further comprises at least 0.2 % by weight hydrogen peroxide bleach and an optical brightener and is also substantially free from hydrotropes. The compositions may be used as a main wash bleaching liquid or a pretreatment liquid and may be activated with a bleach activator.

Description

Concentrated alkaline isotropic liquid detergent with bleach

Liquid detergents for washing concentrated alkaline isotropic fibers generally contain nostalgic substances such that high surfactant levels are used without significant increase in viscosity. Typical perfumery materials are sodium xylene sulfonate, ethanol and propylene glycol. International application WO 96/30483 contains such a composition consisting of a mixture of nonionic and anionic surfactants, in addition to perfumery inducers and hydrogen peroxide, which compositions exceed 40% total surfactant or It is characterized by containing more than 20% total surfactant in the case of rich anionicity. Concentrated peroxide liquids are preferred because the cost of transport and storage is reduced. The solution to the problem of how to form a stable concentrated alkaline isotropic fiber cleaning liquid detergent with peroxide has not been known to those skilled in the art for many years.

Although there are many publications about liquid detergent formulations for concentrated alkaline isotropic fibers containing perfume, few publications describe formulations without perfume. The most recent prior art is probably the 15% anionic (secondary alkane sulfonate) and 3.75% nonionic (primary alcohol ethoxylate (7EO)) compositions described in WO 96/01311. This formulation has a total surfactant level of 20% or less. In addition, the composition does not contain additional ingredients such as optical bleach, anti-reposition agent or dye transfer inhibitor that make it unsuitable for use as a concentrated alkaline isotropic fiber wash liquid detergent with a practical hydrogen peroxide bleach.

Thickening peroxide compositions are also known. They contain concentrated systems only to increase the viscosity in the presence of low levels of surfactant. British Patent 2255507 describes a thickening peroxide containing composition that is typical and has less than 10% surfactant. These compositions are not suitable for use as laundry detergents. They are concentrated to provide the desired result of a squeezable composition that does not work when touching the vertical interface. Such compositions contain no perfume and always contain less than 10% of the total surfactant. The skilled person would not use a composition free of such thickening perfumery as a starting point for the preparation of new concentrated fiber cleaning detergents.

We have found that the presence of perfumed substances has a great and very undesirable negative effect on the storage stability of concentrated alkaline isotropic fiber cleaning liquid detergents, in particular this is a problem with compositions containing high levels of surfactants. I found out. This is usually a problem with formulations of concentrated liquid detergents because such detergents contain perfumery substances. Concentrated herein means that the liquid in the undiluted state contains at least 15%, preferably at least 20%, most preferably at least 23% of the total surfactant. All percentages are based on w / w unless otherwise noted.

According to the present invention, there is provided a liquid detergent composition for cleaning concentrated isotropic fibers comprising at least 15% of total surfactant, further at least 0.2% hydrogen peroxide bleach and optical bleach, wherein the composition is substantially free of perfume. A liquid detergent composition for washing concentrated alkaline isotropic fibers is provided. It is preferred that the composition is free of any added perfume. The presence of small amounts of 2.5%, preferably less than 1.5%, most preferably less than 0.5%, of a substance that can act as a perfumery material may be present as a result of one component of the composition containing this substance as a minor component or impurity. These ingredients should be beneficially avoided as they may degrade the shelf life of the composition, but in contrast to very stable compositions, the loss of performance due to the very small amount of material that can act as a perfume is still acceptable. It has a shelf life. Substantially free of nostalgic material is defined herein to mean that the material capable of acting as a nostalgic material is present at a concentration of less than 2.5%, preferably less than 1.5% and most preferably less than 0.5%.

The total surfactant level is preferably at least 20%, more preferably 23%. Preferably the composition consists of anionic and nonionic commanding agents.

Any optical brightener comparable to the peroxide can be used. An optical brightener with good compatibility with a peroxide bleach is, for example, tinopal CBS-X, a distyryl biphenyl derivative such as Ciba gauge.

According to a second aspect of the invention, the composition comprises at least 23% of a surfactant selected from the group consisting of anionic and nonionic surfactants, further comprising at least 0.2% of total surfactant level consisting of hydrogen peroxide bleach, substantially nostalgic There is provided a liquid detergent composition for washing concentrated alkaline isotropic fibers, which is free of substances. The composition may also consist of an optical brightener as defined above.

If present, the nonionic surfactant preferably consists of at least 5% by weight of the total composition, and advantageously the composition contains a surfactant that does not meet the pH criteria when tested according to Test A as described below. 5% or less. Most advantageously, when tested according to Test A, it contains less than 5% of surfactants that do not meet the residual peroxide criteria.

Although fully nonionic or anionic surfactant systems can be used, the surfactant system preferably consists of a mixture of anionic and nonionic surfactants.

Among the preferred anionic surfactants are:

a) having a low sodium sulfonate content such as secondary alkanesulfonate, 93% active flakes such as Hostapur SAS 93 (Hoechst) or Marion PS65 Sodium n-alkane (C _13-17 ) sulfonate from Huls;

b) linear alkyl (C _10-13 ) benzene sulfonic acids (from Huls) such as Marion AS3;

c) alkyl ether sulfates, such as Neopon LOS70, 70% active sodium salt (from Witco); And

d) olefin sulfonates (such as Hoechst), such as Hostapuru OS which are provided as 40% activity.

Among the preferred nonionic surfactants:

e) Primary alcohol (C _13-15 ) ethoxylate ethoxylated with 5 to 9 moles, preferably 7 moles of ethylene oxide, such as Cinferonic A7 (manufactured by ICI / Cargo feet).

The pH of the composition is in the range of 7 to 12, preferably about 9.5.

The peroxide is preferably present as dissolved hydrogen peroxide in an amount ranging from 0.2 to 15% by weight, preferably 1 to 8% by weight, most preferably about 5% by weight.

The composition may also consist of conventional minor amounts of components found in very dirty liquid detergent compositions. They are preferably polyvinylpyrrolidone (PVP), which acts as a hydrous, moderately attacked enzyme, surfactant preservative, thickener, pigment, enhancer, anti-reposition agent, dye transfer inhibitor (both anti-reposition agent and dye transfer prevention polymer). ), And other conventional additives.

The composition preferably contains a sequestering agent. Preferably the sequestrant is sodium diethylene triamine pentadiamine pentamethylene phosphonate sold alone as Dequest 2066 by Monsanto alone or 2,2'-dipyridylamine (DPA) or 1 Used with 2'-Diaminocyclohexyl tetrakis methylene phosphonic acid. Sequestrants for other transition metal ions can be used in addition to or in addition to these preferred sequestrants.

In a preferred embodiment, the composition according to the invention is activated using a bleach activator, such as TAED, which can lead to contact with the composition when used by two separate systems.

According to a third aspect of the present invention, a liquid detergent composition for washing concentrated alkaline isomeric fibers may be used to stain or pretreat certain portions of the fibers prior to washing. Stain removal in this process is better than what can be obtained from known acid peroxide compositions, and all performance is enhanced by the highest levels of surfactants possible in the compositions according to the invention. The use of concentrated formulations also provides a benefit of low shipping and packaging costs, which is environmentally desirable. The pretreatment method consists in administering a composition according to any one of claims 1 to 11 to a selected area of the item. The treatment time is typically 1 to 5 minutes, preferably about 2 minutes.

Compatibility of Surfactants with Peroxides

The following procedure is used to distinguish suitable surfactants based on pH and peroxide stability data with reference to Test A. Test formulations are prepared and screened using 20% w / w of the surfactant (except Malinat CM20 tested at 15% w / w). After sequestration with Dequest 2066, sufficient hydrogen peroxide is added to provide a 5% w / w concentration of peroxide, and the pH is adjusted to 9.5 by the addition of a previously sequestered caustic solution. Details of the surfactants tested are shown in Table 1.

Table 1 Surfactants tested

code Surfactants source type Activator weight% Anionic A1 Marlon AS3 Huls Linear alkyl (C _10-13 Benzene Sulphonic Acid 97 A2 Marlon AS350 Huls Linear Alkyl (C _10-13 ) benzene Sulfonate , Sodium Salt 50 A3 Marlon PS65 Huls Secondary alkanes (C _13-17 ) sulfonate , sodium salt 65 A4 Hostapur SAS93 Hoechst Secondary Alkanes (C _13-18 Sulfonates 93 A5 Empicol 0045 Albright Alkyl Sulfate , Sodium Lauryl Sulfate 95 A6 Neopon LOS70 Witco Alkyl Ether Sulfate Alkyl Ether Sulfate, Sodium Salt 70 A7 Marlinat CM20 Huls Alkyl ether carboxylic acids C ₁₂ / C ₁₄ fatty alcohol polyglycol ethers (2EO) carboxylic acids 90 A8 Crodasinic LS30 Croda Sarcoidosis when carbonate _{- RCONCH 2 (CH 3) COOH} , R = alkyl with one sarcosine sodium laurate 30 A9 Adinol CT95 Croda Taurate -RCON (CH ₃ ) CH ₂ CH ₂ SO ₃ Na, R = alkyl sodium methyl cocoyl taurate 95 A10 Hostapur OS Hoechst Olefin Sulfonate 40

Following Table 1

code Surfactants source type Activator weight% Nonionic N1 Synperonic A7 ICI Primary Alcohol Ethoxylate C ₁₃ / C ₁₅ Primary Alcohol Ethoxylate (7EO) 90 N2 Genaminox LA Hoechst Amine Oxide Lauryl Dimethylamine Oxide 30 Amphoteric P1 Dehyton AB30 Henkel Betaine -RN (CH ₃ ) ₂ CH ₂ COO, R = alkyl coco-betaine 30

Experience has led to the following pH and peroxide stability targets. Residual peroxide is measured by permanganate titration. The surfactant must pass through both pH and peroxide targets. Small amounts (preferably less than 5%) of surfactants that do not pass all the targets can be used, but this is only practical if a large amount of the surfactant exceeds the target by significant margin. From the test results shown in Table 2, it is possible to have satisfactory room temperature stability even if the stability deteriorates at elevated temperatures. Such surfactants will not be suitable for use in compositions intended to be stored at temperatures above 30 ° C., which is often the case in milder climates.

pH target:

9.0 after 12 weeks storage at pH ²⁵ ₁₂ ≥ 25 ° C

7.5 after 12 weeks of storage at pH ³⁷ ₁₂ ≥ 37 ° C

8.0 after storage at pH ⁴⁵ ₄ ≥ 45 ° C for 4 weeks

Residual Peroxide Target:

Per ²⁵ 85% after 12 weeks storage at ₁₂ ≥ 25 ℃

50% after 12 weeks of storage at Per ³⁷ ₁₂ ≥ 37 ° C

Per ⁴⁵ 55% after 4 weeks storage at ₄ ≥ 45 ° C

Table 2 Results of Test A

Surfactants pH ²⁵ ₁₂ pH ³⁷ ₁₂ pH ⁴⁵ ₄ Per ²⁵ ₁₂ Per ³⁷ ₁₂ Per ⁴⁵ ₄ Target ≥9.0 ≥7.5 ≥8.0 ≥85.0 ≥50.0 ≥55.0 A1 9.7 9.4 9.5 85.0 53.8 56.4 A2 9.3 6.9 6.7 69.2 34.8 43.2 A3 9.9 10.0 9.9 99.2 58.0 55.6 A4 9.9 * 10.1 * 9.6 84.8 * 51.8 * 64.0 A5 9.7 ** 9.2 ** 8.4 70.4 ** 25.6 ** 22.2 A6 9.4 7.5 8.2 85.4 56.8 62.2 A7 9.4 ** 7.7 ** 7.3 97.6 ** 82.4 ** 83.8 A8 7.7 7.2 7.0 75.2 37.4 52.5 A9 6.9 5.7 6.1 84.7 70.2 71.1 A10 9.6 *** 9.5 *** 9.5 96.5 ** 88.2 *** 76.5 N1 9.1 8.2 8.8 90.0 79.6 82.2 N2 8.2 7.5 7.5 90.0 59.0 64.6 P1 9.3 ** 8.1 ** 7.5 84.2 ** 0** 0.2

* 16 weeks data

** 8 weeks data

*** 4-week data

The surfactants that passed both the pH and surfactant stability tests are described below (this eliminates surfactants whose good peroxide stability is mainly due to the decrease in pH in the composition). A3 and A4 were excellent in terms of pH stability because the pH was pushed upwards for this. In practice, pushing upwards is not a problem because the benefits of the alkaline composition are retained.

Reduction of pH Stability: A1> A4 / A3> N1 / A6

Reduction of Peroxide Stability: N1> A6> A3> A4> A1

Thus, considering both pH and peroxide stability, preferred surfactants are as described above. Particularly preferred combinations of pH stability and peroxide stability are secondary alkane sulfonates A3 and A4.

In addition to pH and peroxide stability, upward movement must also be suitable. We screened a surfactant that passed the pH and peroxide stability standards and obtained the following results in a method referenced to Test B herein. Test B consists of measuring the viscosity of a series of surfactant solutions with a 5% increase in concentration. The concentrate above the value of 1200 cps is considered herein as a critical concentration. The level at which a particular surfactant is used in the liquid detergent should be at a critical concentration, preferably at least 5%, more preferably at least 9%. This allows the dosage to be inaccurate and / or evaporate on storage in the commercial preparation of liquid detergents. Table 3 shows the measurement results of the critical concentration for the preferred surfactant. The numbers in the table are the viscosity expressed in centipoise at 25 ° C., 21 s ⁻¹ of aqueous surfactant solution at specific concentrations.

Table 3 Results of Test B

Surfactants Concentration (% by weight) of viscosity below 1200 cps at 25 ° C., 21 s ⁻¹ Anionic A1 25 (1165) A3 35 (925) A4 40 (755) A6 25 (15) Nonionic N1 25 (675)

The present invention will be further described with reference to the following non-limiting examples.

Table 4 shows the items of the example formulations. All composition data are based on 100% w / w.

Table 4

Example One 2 3 4 5 ingredient N1 14.0 17.5 7.5 7.5 15.4 A1 6.0 - - - 5.6 A3 - 7.5 17.5 - 7.0 A4 - - 17.5 - NaOH * 0.77 - - - 0.71 Dequest2066 0.5 DPA 0.06 PVP 0.5 Tinopal CBS-X 0.2 peroxide 5.0 water Up to 100 Initial pH 9.50 9.48 9.50 9.51 9.45 Viscosity (21s ^-1 , 25 ℃) 840 280 115 70 370

Additional NaOH was added to set final pH.

The formulation contains PVP (polyvinylpyrrolidone), Tinopal CB-X, Ciba Gage, an optical brightener as anti-reposition agent and dye transfer inhibitor. The storage data of the formulations in storage conditions in the isothermal range are shown in Tables 5-9. Both pH and residual peroxide data are shown. Primarily, because peroxides are more stable under acidic conditions, ideal peroxide stability is obtained when the pH in the composition is reduced. Lowering pH is undesirable because it reduces washability and makes it difficult to activate peroxides with bleach activators such as TAED.

Table 5-Example 1

Time Corporation pH Residual Peroxide (%) 5 ℃ 25 ℃ 37 ℃ 45 ℃ 5 ℃ 25 ℃ 37 ℃ 45 ℃ 0 9.50 9.50 9.50 9.50 100 100 100 100 One 9.39 9.25 9.22 9.16 - - - - 2 9.63 9.37 9.37 9.24 100 99.59 96.69 96.48 4 9.34 9.22 9.19 8.98 - - - - 8 9.37 9.07 8.92 7.21 100 97.52 88.61 82.61 12 9.43 9.13 8.73 7.0 100 94.21 84.89 77.64 16 9.30 9.13 7.77 6.50 100 94.20 84.88 81.98 24 9.47 9.03 7.47 6.05 100 92.55 78.70 75.80

Table 6-Example 2

Time Corporation pH Residual Peroxide (%) 5 ℃ 25 ℃ 37 ℃ 45 ℃ 5 ℃ 25 ℃ 37 ℃ 45 ℃ 0 9.48 9.48 9.48 9.48 100 100 100 100 One 9.36 9.44 9.32 9.42 100 100 99.60 98.60 2 9.54 9.16 9.14 9.14 100 100 97.60 95.19 4 9.44 9.08 9.03 7.35 100 100 95.79 89.38 8 9.35 8.87 8.14 6.86 97 100 92.86 88.17 12 9.52 9.03 7.52 6.50 100 100 90.60 92.60

Table 7-Example 3

Time Corporation pH Residual Peroxide (%) 5 ℃ 25 ℃ 37 ℃ 45 ℃ 5 ℃ 25 ℃ 37 ℃ 45 ℃ 0 9.50 9.50 9.50 9.50 100 100 100 100 One 9.40 9.65 9.32 9.30 98.80 99.60 98.69 100 2 9.61 9.47 9.51 9.38 100 98.00 96.60 91.38 4 9.46 9.37 9.38 8.88 100 99.00 87.20 79.36 8 9.31 9.15 9.05 6.99 100 95 82.17 70.94 12 9.55 9.35 9.15 6.85 100 96.2 80.6 71.70

Table 8-Example 4

Time Corporation pH Residual Peroxide (%) 5 ℃ 25 ℃ 37 ℃ 45 ℃ 5 ℃ 25 ℃ 37 ℃ 45 ℃ 0 9.51 9.51 9.51 9.51 100 100 100 100 One 9.57 9.55 9.56 9.62 100 100 98.97 92.61 2 9.86 9.67 9.74 9.78 100 100 96.72 85.42 4 9.61 9.55 9.47 9.35 100 98.56 78.03 73.10 8 9.68 9.57 9.44 7.80 98.15 96.72 75.16 59.10 12 9.88 9.59 9.37 7.00 100 98.15 73.70 55.10

Table 9-Example 5

Time Corporation pH Residual Peroxide (%) 5 ℃ 25 ℃ 37 ℃ 45 ℃ 5 ℃ 25 ℃ 37 ℃ 45 ℃ 0 9.45 9.45 9.45 9.45 100 100 100 100 One 9.53 9.49 9.42 9.39 100 100 95.42 92.03 2 9.58 9.50 9.40 9.31 99.4 98.41 95.62 91.44 4 9.62 9.46 9.32 8.16 100 99.0 90.24 81.08 8 9.80 9.63 9.05 6.99 100 100 86.70 78.50

The present invention relates to a liquid detergent for washing concentrated alkaline isotropic fibers with a hydrogen peroxide bleach.

Claims (13)

A liquid detergent composition for washing concentrated alkaline isotropic fibers, comprising at least 15% by weight of surfactant and additionally at least 0.2% by weight of hydrogen peroxide bleach and optical brightener, substantially free of fragrance as defined above. The liquid detergent composition of claim 1, wherein the composition is composed of at least 20% by weight of surfactant. A liquid detergent composition for cleaning concentrated isotropic fibers comprising at least 23% by weight of surfactant and additionally at least 0.2% by weight of hydrogen peroxide bleach, substantially free of fragrance, as defined above. The liquid detergent composition according to any one of claims 1 to 3, wherein the surfactant is composed of anionic and nonionic surfactants. The liquid detergent composition according to any one of claims 1 to 4, wherein the anti-repositioning agent further comprises a concentrated alkaline isotropic fiber. The liquid detergent composition according to any one of claims 1 to 5, wherein the dye migration inhibitor further comprises. 7. The liquid detergent composition according to any one of claims 4 to 6, wherein the nonionic surfactant consists of at least 5% by weight of the total composition. 8. The liquid detergent composition of claim 7, wherein the composition consists of up to 5% of a surfactant that does not meet the desired pH when tested according to Test A as described herein. The liquid detergent composition of claim 8, wherein the composition consists of up to 5% of a surfactant that does not satisfy the desired residual peroxide when tested according to Test A as described herein. 7. The liquid detergent composition of claim 6, wherein at least 95% of the surfactant consists of a surfactant used at a level below the allowable concentration as measured by Test B described herein. 4. The concentrated alkaline isotropic fiber cleaning liquid composition according to claim 3, wherein all of the surfactants used also satisfy the pH target of Test A and preferably the peroxide stability target, and are used at levels below the allowable concentration measured by Test B. Detergent composition. A method of washing laundry with a bleach activator, preferably TAED, in addition to the wash liquor, the wash liquor consisting of the composition according to claims 1 to 11. 12. A composition according to any one of claims 1 to 11 is administered to selected areas of laundry and the composition is contacted with the laundry for a short treatment time. And then washing the laundry.