JPH01103700A - Liquid detergent composition - Google Patents

Abstract

PURPOSE: To obtain a liquid detergent composition which is excellent in flow characteristics and stability and has turbid appearance by partly dissolving a polymer in a structured phase containing a detergent active material dispersed in an aqueous phase containing a dissolved electrolyte.

CONSTITUTION: The polymer (0.5 to 4.5 wt.%) for lowering viscosity [e.g.; poly(meth)acrylic acid] is added and is partly dissolved to and in the structured phase containing the detergent active material dispersed in the aqueous phase containing 1 to 60 wt.% of the dissolved electrolyte. Then, 0.05 to 20 wt.% a second polymer (e.g. polyethyleneglycol) which has electrolyte resistance with which turbidity point reaching amount of 100 ml of 5 wt.% aq. soln. is ≥5 g sodium nitrilotriacetate, 20% aq. soln., vapor pressure below that of a reference aq. soln., obtained by dissolving ≥2 wt.% polyethyleneglycol with 6,000 average molecular weight in 20% aq. soln. and which has ≥1,000 molecular weight, is added and dissolved therein to obtain the liquid detergent composition causeing only <2% phase separation after storage at 25°C for 21 days and having ≤1 pas viscosity at 21S^-1 shearing rate and ≥8.0 pH.

COPYRIGHT: (C)1989,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to liquid detergent compositions of the type containing structures formed from cleaning active substances, wherein the active structures are present as a separate phase in a continuous phase which is predominantly aqueous. It exists dispersedly in This aqueous phase usually contains dissolved electrolytes.

Structuring as described above is very well known to those skilled in the art and can be intentionally achieved to impart consumer-preferred properties such as flow characteristics and/or cloudy appearance.

Also, particulate solids such as detergency builders and abrasive particles can be suspended in many active structure liquids.

Some of the various active structurings that are possible are listed in the bibliography, Halters (Ed.), 'Rheom
etry: In-dusLreal 8ppli
caEions', J., Wiley &amp;
5oz.

Letchworth, H98 in 1980, B
arnes, 'Deter-gents', Ch.
, 2. It is stated in The degree of order of the systems, as obtained by their structuring, usually increases as the concentration of surfactant and/or electrolyte increases. At very low concentrations, surfactants can exist as molecular or spherical micelle solutions, both of which are isotropic. Further addition of surfactants and/or electrolytes can produce structured (anisotropic) systems. These systems are variously referred to as rod-like micelles, planar lamellar structures, lamellar droplets, or liquid crystalline phases, respectively. Often, different researchers have used different terminology to refer to structures that are actually the same. For example, European Patent Publication No. 151.884
The lamellar droplets are referred to as "spherulites" in this issue. Determination of the presence or absence of surfactant structured systems in liquids, as well as the identification of chain threads, can be carried out using e.g. optical techniques, various rheology methods, This can be carried out by methods known to those skilled in the art, such as radiation or neutron diffraction and, in some cases, electron microscopy.

A common example of an internal surfactant structure as described above is the dispersion of lamellar droplets, which have an onion-like shape consisting of two concentrically located surfactant molecular layers. water or an electrolyte solution (aqueous phase) is trapped between the two molecular layers. Such closely packed droplet systems provide a highly desirable combination of physical stability and solid suspension properties with useful flow properties.

The electrolyte may only be dissolved in the aqueous continuous phase, or it may also be present as suspended solid particles. Solid particles that do not dissolve in the aqueous phase can replace or be suspended with any solid electrolyte particles.

There are typically three types of products: heavy-duty fabric cleaning liquids, liquid abrasives, and general-purpose cleaners. In the first type, the suspended solids may be substantially the same as the dissolved electrolyte, ie, may be excess electrolyte above the solubility limit. This solid is normally present as a detergent building block, ie, in a cleaning solution to counteract the effect of calcium ions on water hardness. Additionally, it may be desirable to suspend substantially insoluble particles of a bleaching agent, such as, for example, diberoxide dodecanoic acid (DPDA). In the second type, the suspended solids are usually particulate abrasives and are insoluble in the system. In this case, the electrolyte is another substance that is soluble in water and is present to contribute to the structuring of the active substance in the dispersed phase. However, in some cases the abrasive may contain some soluble salts that dissolve upon dilution of the product. The third type uses structures that thicken the product to achieve consumer-preferred flow characteristics and optionally suspend pigment particles. Compositions of the first type are disclosed, for example, in European Patent Publication No. 38,101 filed by the applicant, in which suspended D
Compositions containing PD antidepressants are disclosed in European Patent Publication No. 160,342. An example of a second type of composition is given in European Patent Publication No. 1 filed by the applicant.
No. 04,452. A third type of composition is disclosed, for example, in US Pat. No. 4,244,840.

Two problems are usually encountered when preparing the above systems, particularly liquids containing solids suspended by lamellar droplets.

The first problem is the high viscosity which makes the product difficult to pour, the second problem is the instability, i.e. the dispersion of the dispersed phase and the aqueous phase on storage at elevated temperatures or even on storage at ambient temperature. tend to separate. In the preparation of such liquids, care must therefore always be taken to select the nature and concentration of the active substances and electrolytes in such a way as to obtain the required rheological properties.

Although this preparation technique is always achieved to idealize the ingredients of the preparation to balance the desired flow properties and stability, some combinations are impractical - e.g. , when it is desired to produce a concentrated product in which the total amount of cleaning actives is relatively high compared to the other components. In this case, the problem for commuters is the unacceptably high increase in viscosity.

One method of controlling viscosity in general is to make the liquid shear-thinning, i.e., the liquid composition remains highly viscous while at rest in the container, but the shear force is reduced by the pouring motion to the yield point. If the temperature exceeds 100,000 ml, it will flow more easily. This property is exploited in the compositions disclosed in the above-mentioned European Patent Publication No. 38,101 filed by the applicant. Unfortunately, it has been found that this property is not readily available for all theoretically possible combinations of components of liquids with high levels of activity, for example.

It is also known that the inclusion of fabric softeners (e.g. bentonite) in liquids can lead to an unacceptably high increase in viscosity. One way to alleviate this drawback has been to further include small amounts of soluble low molecular weight polyacrylates. This method is described in British Patent Publication No. 2,168,717
Disclosed in the issue. However, if the above-mentioned polymers are to be used to control the viscosity of a wide range of structural liquids, attempts may be made to gradually incorporate more and more polymers. An additional or additional reason to use higher amounts of this polymer is that it has detergency builder properties, i.e., it has properties that offset the effects of calcium ions on water hardness. . This is particularly important when it is desirable for environmental reasons to use the polymers to replace (all or part of) the conventional phosphate builders.

Unfortunately, attempting to dissolve relatively large amounts of polymer in a structural liquid (as well as attempting to contain relatively large amounts of any component of the structural liquid) tends to lead to instability, i.e., when two or more different An increased tendency to divide into phases is often observed.

However, in the case where the above-mentioned instability occurs, the applicant adjusts the composition so that only a part of the above-mentioned polymer dissolves and the rest is contained in the composition as a stable "" insoluble phase. It has also been discovered that the amount of polymer that can be stably contained can be increased by doing so.

That is, the composition of the present invention comprises a tM phase formulation containing a detersive active material dispersed in an aqueous phase containing a dissolved electrolyte;
and a viscosity-reducing polymer, wherein the polymer is only partially soluble in the electrolyte-containing aqueous phase.

In preferred embodiments, the compositions of the invention are sufficiently stable;
Less than 2% phase separation occurs upon storage for 21 days at 25°C, although somewhat less stability may be acceptable in some cases.

It is possible for the composition to contain relatively large amounts of polymer without introducing instability, and the viscosity achieved is acceptably low, preferably at a shear rate of 21
Viscosities of less than 1 Pas in s-', but in some cases slightly higher may also be acceptable.

While not wishing to be bound by any interpretation or theory, Applicants believe that one explanation for such results is that the observed and undesirable early onset of instability as described above is due to the presence of polymer-free liquids. However, as the amount of added polymer increases, the viscosity of the liquid decreases, but we propose that this is due to the presence of conditions such that the polymer suddenly stops dissolving once the limit is exceeded.

The sudden loss of solubility of the added polymer is schematically illustrated by the curve in FIG. The dashed line indicates the beginning of instability, after which the unstable state continues. However, all polymer samples do not contain molecules with the same arrangement and the same molecular weight, but instead have various molecular spectra depending on the degree of polymerization (in the case of copolymers, the component ratios also differ). For simplicity of applicant's theory, the present invention adjusts the liquid conditions such that one broad range of polymers is still soluble at much higher concentrations than other range of polymers. It can be seen as something that can be obtained by

In Figure 1, curve B is (different from the case to the curve)
Curve C represents a range of polymers that may still be soluble at high concentrations under certain conditions, while curve C shows molecules that become insoluble at much lower concentrations. It appears that the polymer shown by the curve can be stably contained. This is clearly an oversimplification, since it is difficult to imagine that under any combination of conditions a polymer sample could be broadly classified into these two broad categories. In fact, it would be more reasonable to view the results as having continuity. However, this simplified explanation will help you understand the phenomenon presented above.

Applicants believe that molecules that do not dissolve (curve C) while other molecules continue to dissolve (curve B) are contained in the structured liquid in a suspended precipitate phase. Evidence suggesting this phenomenon was obtained using electronic microscopy.

In other words, the present invention involves modifying compositions that become unstable earlier at higher polymer concentrations to achieve the results described above. In effect, it can thus be said that the amount of polymer stably contained in the composition according to the invention is greater than the amount of polymer in the reference composition, with at least one parameter of the composition according to the invention
Substantially more than the maximum amount of polymer in the standard composition, that is, if more polymer is dissolved, more polymer than the polymer amount that will cause the phase separation of the standard composition to be 2% or more during storage at 25°C for 21 days will be dissolved. The parameters of the reference composition are varied as obtained.

Composition parameters that are altered to dissolve more than the maximum amount of polymer in the reference composition may be the amount or nature of the electrolyte in the pH 1 composition, or optionally the amount or nature of the cleaning active.

The viscosity-reducing polymers that can be used in the present invention can be selected from a very wide range and include, among others, the polymers and copolymer salts known as detergent virgoos. For example, polyethylene glycols (both builder and non-builder), polyacrylates, polymaleates, polysaccharides (both builder and non-builder),
), polysaccharide sulfonate (polysugarsulf
onates), as well as copolymers of any of these.

In some preferred embodiments, the viscosity-reducing polymer includes a copolymer containing an alkali metal salt of polyacrylic acid, polymethacrylic acid, or maleic acid, or an anhydride thereof. Preferably, the pH of the composition containing these copolymers is greater than 8.0.1 Generally, the amount of viscosity-reducing polymer can vary widely depending on what and how much of the other components of the composition are used. However, generally 0.5-4.5% by weight
For example, it is 1 to 3.5% by weight.

It is further preferred that some embodiments of the invention also contain a second polymer, substantially all of which is soluble in the aqueous phase, the polymer having a 5% by weight aqueous solution of 100+
+I has an electrolyte resistance of more than 5 g of sodium nitrilotriacetate, and in a 20% aqueous solution, the vapor pressure is less than or equal to the vapor pressure of a reference aqueous solution in which 2% by weight or more of Borie, ethylene glycol having an average molecular weight of 6,000 is dissolved in water. and the molecular weight of the second polymer is at least 1,000. Mixtures of such second polymers may also be used.

The inclusion of a second polymer results in a composition that has greater stability at the same viscosity (compared to a composition that does not contain the second polymer) or a composition that is equally stable and has a lower viscosity. It becomes possible to prepare compositions. The second polymer may also reduce upward drift in viscosity if it also results in viscosity reduction.

The inclusion of a second polymer is particularly preferred if the insoluble portion of the viscosity-reducing (first) polymer is large. This is because even though the first polymer has excellent ability as a builder (because a relatively large amount of the polymer can be stably contained), a decrease in viscosity is undesirable (because only a small amount of the polymer dissolves). be. That is, the second polymer can usefully function to further reduce the viscosity to ideal levels.

The second polymer is 0.05-20% by weight of the total composition.
It is preferable to contain it, most preferably 0.1 to 2
．． The content is preferably 5% by weight, particularly 0.2 to 1.5% by weight. In many (but not all) compositions, levels above the above levels can cause instability. A number of different polymers can be used as the second polymer as long as they meet the needs in terms of electrolyte resistance and vapor pressure.

Electrolyte resistance is 5% of polymer dissolved in water at 25°C.
It is determined as the amount of sodium nitrilotriacetate-1-(NaNT^) solution required to reach the turbidity point of 100 ml of solution, the elimination of which is neutral, ie the pH is adjusted to about 7. This measurement is preferably carried out using sodium hydroxide. A preferred electrolyte resistance is NaNTAlog;
More preferably it is 15g. The vapor pressure of the second polymer is
As outlined in No. 49, it must be small enough to exhibit sufficient water binding strength. The measurement of the vapor pressure is preferably carried out using a reference aqueous solution with a concentration of 10% by weight, in particular 18% by weight.

Typical groups of polymers that meet the above needs and can be used as the second polymer include polyethylene glycol, dextran, dextrans sulfonate, and polyacrylate-maleic acid copolymers. Whether a given polymer is only partially or substantially completely soluble in the overall system depends on other components, particularly the amount and type of electrolyte material.

The second polymer must have an average molecular weight of at least i,ooo, with a minimum average molecular weight of 2.000
A typical average molecular weight range that provides advantageous viscosity control is from 1,200 to 30,000, particularly from 5,000 to 30,000.

The cleaning active can be any substance known to those skilled in the art as producing structured liquids, usually one of anionic, cationic, nonionic, zwitterionic and zwitterionic surfactants. You can choose from the above. However, one example of a preferred combination includes: a) a nonionic surfactant and/or a polyalkoxylated anionic surfactant, and b) a non-polyalkoxylated anionic surfactant.

In some embodiments, the cleaning active may also include alkali metal soaps, preferably fatty acids having from 12 to 18 carbon atoms. The fatty acids mentioned above generally include oleic acid, ricinoleic acid and castor oil, rapeseed oil, peanut oil,
It is a fatty acid derived from coconut oil, palm kernel oil, or a mixture of these acids.

Sodium or potassium soaps of the above acids may be used, potassium soaps being preferred.

Nonionic surfactants suitable for use include, in particular, hydrophobic groups such as aliphatic alcohols, acids, amides, or alkylphenols, such as alkylene oxides, especially ethylene oxide alone or together with propylene oxide, and reactive hydrogens. Includes reaction products of compounds with atoms. Specific nonionic detergent compounds include alkyl (C6-C2□) phenol-ethylene oxide condensates, primary or secondary straight or branched aliphatic (C8
~C1,) condensation products of alcohols, as well as products obtained by condensing ethylene oxide with the reaction product of propylene oxide and ethylene diamine. Other so-called non-ionic detergent compounds include long chain tertiary amine acids (arsenic acids), long chain tertiary phosphine oxides and dialkyl sulfoxides.

Anionic surfactants are typically water-soluble alkali metal salts of organic sulfates and sulfonates containing free alkyl groups having from about 8 to about 22 carbon atoms, where the term "alkyl" refers to higher free alkyl groups. The alkyl portion of an acyl group is also meant. Examples of suitable synthetic anionic detergent compounds include sodium and potassium alkyl sulfates, especially those obtained by sulfating higher (Ca□chs) alcohols produced, for example, from tallow or coconut oil; ~C2°) Benzene sulfonates, especially sodium linear tertiary alkyl (C+).

~C15) Benzene sulfone-1. Sodium alkyl glyceryl ether sulfates, especially the above ethers of higher alcohols derived from tallow or coconut oil, and synthetic alcohols derived from petroleum; Sodium coconut oil fatty monoglyceride sulfate and sulfone-1. ; sodium and potassium salts of sulfuric esters of reaction products of higher (Ca-Cl8) fatty alcohols with alkylene oxides, especially ethylene oxide; of fatty acids such as coconut oil fatty acids esterified with isethionic acid and neutralized with sodium hydroxide; Reaction product; Sodium and potassium salts of fatty acid amide of methyltaurine; α-olefin (Ca-
Alkane monosulfonates, such as those obtained by the reaction of C20> with I-lium bisulfite, and those obtained by reacting paraffins with SO2 and C12, followed by base hydrolysis to produce random sulfonates. alkane monosulfonates; and olefin sulfonates, where the term "olefin sulfonates" refers to olefins, especially CI0-C
It is used to refer to a substance obtained by reacting 2G α-olefin with SOz and then neutralizing and hydrolyzing the reaction product. Preferred anionic detergent compounds are:
Sodium (C++-C4,) alkylbenzene sulfonate and sodium (016-Cl8) alkyl sulfate.

The compositions of the invention preferably contain detergency builder stores. This substance can be any substance that is capable of reducing the level of free calcium ions in the cleaning solution and preferably includes compositions such as the generation of an alkaline pH, the suspension of soils removed from fabrics as well as the dispersion of fabric softening clay materials. bring other beneficial properties. Such substances are inorganic,
They can be classified as organic non-polymerizable and organic polymerizable.

It is generally preferred that any inorganic building material (if water soluble) contains all or a portion of the electrolyte.

It is also preferred that the liquid contains suspended solids, in particular as all or part of the builder (in which case the builder need not be water-soluble). The electrolyte typically constitutes 1-60% by weight of the total composition. In some preferred embodiments, the suspended solid is a water-insoluble amorphous or crystalline aluminosilicate, since the liquid tends to have a high viscosity and therefore viscosity reduction by the polymer is required. . As mentioned above, very often the polymer is itself a builder and together with the zeolite produces a very useful phosphorus-free bilge system.

However, when present, phosphorus-containing inorganic detergency builders include water-soluble salts, especially alkali metal pyrophosphates, orthophosphates, polyphosphates and phosphonates. Specific examples of inorganic phosphate builders include sodium and potassium tripolyphosphate, phosphate and hexametaphosphate-1.

Examples of phosphorus-free non-detergent building blocks, if any, include water-soluble alkali metal carbonates, bicarbonates, silicates, and crystalline and amorphous aluminosilicates. Specific examples include sodium carbonate (with or without calcite species), potassium carbonate, and sodium and potassium carbonates and silicates.

Examples of non-polymerizable organic detergency builders, if present, include alkali metal, ammonium and substituted ammonium polyacetates, carboxylates, polycarboxylates, polyacetyl carboxylates. Specific examples include ethylenediaminetetraacetic acid, nitrilotriacetic acid, oxydisuccinic acid, mellitic acid,
Included are sodium, potassium, lithium, ammonium and substituted ammonium salts of benzene polycarboxylic acids and citric acid.

In addition to the components already mentioned, some optional components may also be present,
Such ingredients include, for example, foam boosters such as palm kernel oil fatty acids and alkanolamides derived from coconut oil fatty acids, in particular monoethanolamide, foam suppressants, sodium perborate and sodium perborton I. oxygen-releasing bleaches, peracid bleach precursors, chlorine-releasing bleaches such as trichloroisocyanuric acid, inorganic salts such as sodium sulfuric acid, as well as fluorescent agents, fragrances, proteases, lipases, usually present in minimal amounts. (For example, N
These include enzymes such as ovo's Lipolase® and amylase, fungicides, colorants, and fabric softening clay materials.

The compositions of the present invention can be prepared using conventional liquid detergent product processing techniques known to those skilled in the art.

However, the order of addition of the ingredients can be important. That is, (
An example of a preferred order of addition (with continuous mixing) is to first add the soluble electrolyte to the water, then add any insoluble material such as aluminosilicate, then the polymer, followed by the active material, and add the insoluble electrolyte to the water. The substance, polymer and active substance may be mixed prior to addition to the electrolyte-aqueous phase. Another preferred order of addition is to add any insoluble material such as the aluminosilicate to the water, the partially soluble polymer, then the cleaning active material, followed by the electrolyte.

The resulting mixture is cooled to below 30:C, after which it is possible to add any minor and additional ingredients. Although a second polymer (in some cases) is added to reduce the viscosity to the desired level, it is indeed often possible to "titrate" the viscosity to the required level by adding the second polymer in small portions. Finally, if necessary, the pt+ of the composition can be further adjusted, for example by the addition of small amounts of caustic material.

The invention is detailed below by means of non-limiting examples.

The following provisions apply to all embodiments. All proportions are in weight percent unless otherwise indicated.

Mustache 11” Ha LAS=Na-dodecylbenzenesulfonate L
ES - lauryl ether sulfate (approximately 3 EO) nonionic (1) = ethoxylated fatty alcohol (C1
,~1sEO+) Non-ionic (2) = ethoxyl [dehydrated fatty alcohol (C13-1sEO7) t Agency Bo1mer polymer virgoo (1) = copolymer of acrylate 1 ~ and maleate sodium salt, maleic acid nialic acid is Approximately 3.8:1, average l is approximately 70,000.

Polymer Virgo (2) - A copolymer of acrylate and maleate sodium salt with a ratio of about 1.6:1 acrylic maleate and an average I of about 50,000.

"]2°" Polymer (L) Na-polyacrylate, average old approx. 1.20
0゜(2) Na-polyacrylate, average Old Testament 2,
500° (3) Nn-polyacrylate, average molecular weight approximately 5,000° (4) Na-polyacrylate, average molecular weight approximately 8,000° (5) Na-polyacrylate,
Average MW: about 15,000° (6) Na-Polyacrylate, Average M: about 30,000° (minimal) Kuchimatayoshi-Enzyme-Protein Hydrolyzing Type: 1 Part LL The following compositions in Table I were prepared. These compositions had stability and viscosity as shown in this table.

The parameters marked ``IvarI+'' had varying values and the results of stability and viscosity measurements for them are listed in Tables ■ and Table ■, respectively. In the examples described herein, ``IvarI+'' refers to (approx. 21-25℃)
This means that it shows less than 2% phase separation over 3 months. The meaning of ``unstable'' is determined according to this.

Todoroki-1 Group ↑ ■ Shadow of polymer f agency in 3 - Polymer builder (1) Stability Viscosity at 21s-' (wt%) (mPas)
O stable 2,400 0.6 stable 2.500
1 Stable 9502
Stable 1.0503
Stable 1.0504
Stable 1.3005
Unstable 1,450 These results are
The absence of polymer indicates that the viscosity of the product is so high that it cannot be easily poured. It is clear that 4% or less of polymer can be stably contained in such a composition in which the polymer is only partially dissolved (see Table 1 below). In reference composition 1, 3.5% of the polymer is completely dissolved, but the composition is already unstable.

Table-dish composition pI stability 21s-
' Viscosity (mPas) In 7.0 Unstable
120■ 7.5 Unstable
160■ 8.0 Unstable
270■ 8,4 Stable
230 ■ 9.1 Stability
180■ 7.0 Stable
660■ 7.5 Stable
700 ■ 8,0 Stable
720■ 8.4 Stable
770■ 9.1 Stable
870 These results show that the inclusion of polymer reduces the viscosity (composition ■) but becomes unstable if the polymer (4.2%) is completely dissolved (pH≦8.0). . The doffing viscosities are all lower than those listed in Tables I and ■ without zeolite.

Table - ■ Polymer builder (1) 3.58
．． 77 Turbidity 109°23 Turbidity 109.
61 Cloudy 10★d
Immediately after preparation**: After 4 days storage From this table it can be seen that when the pH is less than 7.95, the polymer completely dissolves as evidenced by the clear appearance. If the pH is greater than 7.95, the polymer is also present in a polymer-rich "insoluble" phase.

Fire ffi The compositions shown in the following table ① were prepared. These compositions are shown in Table ■～
It had the stability and viscosity shown in (2).

The parameters marked IIvarI+ had varying values, and the results of stability and viscosity measurements are listed in Tables 1 to 2. In the examples described herein, "stable" means exhibiting less than 2% phase separation over 3 months at ambient temperature (±21-25°C). The meaning is also determined.

person-bean ' of Polymer SP Agency and H in Group V.

Polymer builder (1) pH stability 21s
0 at -' 7.8 Stable 1
,5101 7.8 Stable 1
,1802 7.8 Stable
8503 7.8 Unstable 77
03.5 7.8 Unstable 7
300 8.9 Stable 1,6
101 8.9 Stable 1□4
702 8.9 Stable 1,2
20 These results indicate that in the absence of polymer, the viscosity of the product is so high that it cannot be easily poured. In such compositions in which the polymer is only partially soluble (pi (= 8.9), at least 3.5%
It is clear that it is possible to stably contain a polymer of (
(See previous article ■). The polymer is completely dissolved in the reference composition at pH 7.8, but the composition becomes unstable even at 3% polymer.

Table-! ■Ni (Rubo 17-'Office's Multi-O Stable 1,450 0.5 Stable 1.270
1 Stable 1.1202
Stable 1.2703
Stable 1,1503.5
Stability 1,060 From this table it can be seen that with the polymer builder (2) also a reduction in viscosity can be achieved (thus increasing ease of pouring) and the composition can be kept stable.

Under the conditions of composition (1) (pH 8.4), polymer builder (2) is only partially dissolved.

Table-1 Composition pl+ Stability 21s
-' Viscosity (mPas) ■ 7.4 Unstable 93
0 ■ 7.6 Unstable 9
60■ 8,2 Stable
660■ 8.7 Stable
950■ 9.1 Stable
840■ 7.3 Stable
1.760■ 7.8 Stable
1,550■ 8.2 Stable 1,460■ 8.7
Stable 1. ．． 520■ 9.3
Stable 1,410 These results indicate that the viscosity decreases with the inclusion of polymer (■-■), but becomes unstable when the polymer (3.5%) is completely dissolved (pH≦8.0). ing.

The following compositions in Table IX were prepared. These compositions are shown in Table X
~XI[[ had the stability and viscosity shown.

The parameters marked IIvarI+ had varying values, and the results of stability and viscosity measurements are shown in Tables X-XI.
Listed below. In the examples described herein, "stable" means exhibiting less than 2% phase separation over 3 months at ambient temperature (±21-25° C.). The meaning of ``unstable'' is determined according to this.

The parameters marked “var” had various values, and the results of stability and viscosity measurements are shown in Tables X to X.
Listed in ■. In the embodiments described herein, ““stable”
is 2 months at ambient temperature (±21 to 25℃) for 3 months.
% or less of phase separation. The meaning of ``unstable'' is determined according to this.

Table X shows that the addition of the "second" polymer improves the pourability of the composition, especially after a period of storage, because the viscosity drift is reduced.

Todoroki-Anus "Second Pavolimer Concentration 21s-'
Stability (wt%) Viscosity (mPas) -01,800 to 2,200 Stable (3)
0.05 1,520 Stable (3) 0.15 1,380
Stable (3) 0.30 950
Stable (3) 0.45
700 Stable (3) 0.60
650 unstable (5)
0.40 780 Stable (6)
0.40 860 Stable This table shows that the inclusion of the ``second'' polymer reduces the viscosity while remaining stable;
If the concentration of polymer is too high, the composition becomes unstable (e.g. when using 0.6% of "second" polymer (3)).
.

Human Skin This table shows that the inclusion of a "second" polymer improves the pourability of the composition by reducing the viscosity and maintains good stability of the composition; however, If the concentration of the second polymer is too high, the composition can become unstable (especially if the concentration of the second polymer is 0.2%).
in the case of).

Table XII ['Second' Polymer Concentration at 21s-'
Stability (wt%) Viscosity (+nPa5) -02,150 Stable (2) 0.2 1,060
Stable (3) 0.2 790
Stable (4) 0.2 80
0 Stable (5) 0.2
760 Stable (6) 0.2
700 Stable (5) 0
．． 3 520 Stable (6) 0.3
520 Stable This table shows that the lungs are 1,200~
The "second" polymer is 0.2 to 0.30,000.
Note that polymers with higher M- are somewhat more effective on a weight basis, indicating that the inclusion of 3% results in a significant viscosity reduction and thus significantly improves the pourability of the composition. I want to be

[Brief explanation of the drawing]

FIG. 1 is a graph showing the dissolution of polymers in liquids under different conditions. Engraving of drawings (no change in content) Procedural amendment entry 1, Indication of the case Patent Application No. 190503 of 1988 2, Title of the invention Liquid detergent composition 3, Relationship with the person making the amendment Patent applicant name Title Unilever・Naamrose Pen Note Sharp 4, Agent Yamada Building 6, 1-1-14 Shinjuku, Shinjuku-ku, Tokyo, Number of item items increased by amendment 7, Subject of amendment Column for applicant's representative in the application , Power of Attorney and Drawing 8, Contents of Amendment (1) In W21, the representative of the applicant will be added as shown in the attached sheet.

Claims (22)

[Claims] (1) A liquid detergent composition comprising a structured phase containing a detersive active dispersed in an aqueous phase containing a dissolved electrolyte, and a viscosity-reducing polymer, wherein only a portion of the polymer is an electrolyte-containing aqueous phase. A liquid detergent composition dissolved in a phase. 2. The composition of claim 1, wherein the composition exhibits less than 2% phase separation upon storage for 21 days at 25°C. (3) The composition according to claim 1 or 2, characterized in that it has a viscosity of 1 Pas or less at a shear rate of 21 s^-^1. (4) A liquid detergent composition that is stable, i.e., exhibits less than 2% phase separation upon storage for 21 days at 25° C., wherein the total amount of polymer contained is greater than the total amount of polymer in the reference composition, and the composition is substantially The reference composition becomes unstable when more than or equal to the maximum amount of polymer in the reference composition dissolves, i.e., the reference composition exhibits more than 2% phase separation upon storage for 21 days at 25°C. 4. Composition according to claim 1, characterized in that at least one parameter has been changed from that of the reference composition such that a greater amount of polymer can be dissolved. (5) The one or more parameters that are varied from those of the reference composition are selected from among the pH of the composition, the amount and nature of electrolytes, and the amount and nature of cleaning actives. Composition of. (6) Any one of claims 1 to 5, wherein the viscosity-reducing polymer is an alkali metal salt of polyacrylic acid, polymethacrylic acid, or maleic acid, or a copolymer containing an anhydride thereof. The composition described in . (7) Claim 6 characterized in that the pH is higher than 8.0.
The composition described in . (8) The composition according to any one of claims 1 to 7, comprising 0.5 to 4.5% by weight of a polymer that reduces viscosity. (9) The composition according to claim 8, characterized in that it contains 1 to 3.5% by weight of a polymer that reduces viscosity. (10) further comprising a second polymer, the polymer being substantially entirely soluble in the aqueous phase and having an electrolyte resistance of greater than 5 g of sodium nitrilotriacetate in 100 ml of a 5% aqueous solution of the polymer;
The second polymer is also 2% by weight polyethylene glycol having an average molecular weight of 6,000 in a 20% aqueous solution.
the second polymer has a vapor pressure less than or equal to the vapor pressure of a reference aqueous solution in which the second polymer has a molecular weight of at least 1
10. A composition according to any one of claims 1 to 9, characterized in that the composition has a molecular weight of 1,000. (11) The composition according to claim 10, comprising 0.05 to 20% by weight of the second polymer. (12) The average molecular weight of the second polymer is 1,200 to 3
Claim 10 or 1 characterized in that the amount is 0,000.
1. The composition according to 1. (13) the average molecular weight of the second polymer is at least 2;
13. A composition according to any one of claims 10 to 12, characterized in that the composition has a molecular weight of 0.000. (14) The average molecular weight of the second polymer is 5,000 to 3
Claims 10 to 13 characterized in that the amount is 0,000.
The composition according to any one of the above. (15) Claim 1, wherein the cleaning active substance comprises a) a nonionic surfactant and/or a polyalkoxylated anionic surfactant, and b) a non-polyalkoxylated anionic surfactant. any one of 14 from
The composition described in Section. (16) Any one of claims 1 to 15, characterized in that the electrolyte is present in an amount of 1 to 60% by weight of the total composition.
The composition described in Section. (17) The composition according to any one of claims 1 to 16, characterized in that the viscosity-reducing polymer has builder properties. (18) The composition according to any one of claims 1 to 17, characterized in that it contains suspended solid particulate matter. 19. The composition of claim 18, wherein the suspended solid particulate material comprises a water-insoluble aluminosilicate salt. (20) The composition according to claim 18 or 19, wherein the suspended solid particulate material contains the same electrolyte as all or part of the dissolved electrolyte. 21. The composition of claim 18, wherein the suspended solid particulate material comprises a substantially water-insoluble bleaching agent. (22) The composition according to claim 21, wherein the bleaching agent contains DPDA.