JP2001058943A - Liquid composition containing soap, anionic surfactant and amphoteric surfactant and having improved low temperature stability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid shower-gel composition which is not frozen and is capable of being discharged by pump from a vessel by incorporating a free aliphatic acid and the like, an alkali metal source, an anionic surfactant, an amphoteric surfactant and the like, isoprene glycol and diprepylene glycol into the composition. SOLUTION: This composition is obtained by incorporating 1-20 wt. of (A) a free aliphatic acid or a mixture of free aliphatic acids, 1-20 wt.% of (B) an alkali metal source, 1-20 wt.% of (C) an anionic surfactant or surfactants, 1-15 wt.% of (D) an amphoteric/bi-ionic surfactant, 1-7 wt.% of (E) isoprene glycol and 2-8 wt.% of (F) dipropylene glycol into the composition. The ingredient B is preferably an alkali metal hydroxide, an alkali metal carbonate and the like and the alkali metal is preferably sodium. The composition does not preferably freeze at a temperature less than -10 deg.C. and its viscosity is preferably 50-8,000 cps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to liquid compositions used in skin cleansing or shower gel compositions. In particular, the invention relates to fatty acid soaps (which can be added directly or produced in situ from free fatty acids and salts),
It relates to compositions comprising anionic and amphoteric / zwitterionic surfactant systems.

[0002]

BACKGROUND OF THE INVENTION Personal wash shower gel compositions containing fatty acid soaps, anionic surfactants and amphoteric / zwitterionic surfactants are not novel. However, at low temperatures (eg, below 0 ° C.), such compositions tend to freeze and therefore cannot be easily pumped or removed from the container.

The use of isoprene glycol or dipropylene glycol alone (for example, either alone at a level of 9% by weight) does not solve the problem of freezing.

[0004] Unexpectedly, Applicants have found that when isoprene glycol and dipropylene glycol are used together in certain critical ratios in a soap, anionic, amphoteric / zwitterionic surfactant system, the composition freezes. And found that it could be pumped out of the container.

[0005]

The present invention provides (1) 1-2
0 wt%, 1 to 10 preferably 2 to 18 wt%, and most preferably _{to C} 12 _{-C 24} fatty acids or fatty acid mixtures of 5 to 18 wt%, to form a soap in situ by reaction with (2) free fatty acids wt% of the alkali metal source (e.g., alkali metal hydroxides, alkali metal carbonates, mono-, - di - or triethanolamine _salts, salts of C 2 -C ₄ alkylamine, etc.), (3) 1-20 wt %, Preferably 5
15% by weight of one or more anionic surfactants, (4) 1
-15% by weight, preferably 1-10% by weight of amphoteric / zwitterionic surfactant, (5) about 1-7% by weight of isoprene glycol, and (6) about 2-8% dialkylene glycol, preferably Regarding an aqueous liquid shower gel composition containing 4 to 8% of dipropylene glycol, the composition does not freeze at a low temperature of about −5 ° C. or even at a low temperature of about −10 ° C. (measured at 10 s ^−1). T) 50-8000c
ps, preferably 100-3000 cps, more preferably 100-1000 cps, and most preferably 300-cps.
Compositions having a viscosity of 800 cps can be pumped at said temperature.

[0006] Soaps may also be introduced directly into the composition instead of being produced in situ. In this case, component (1)
And (2) are soaps of 1 to 20% by weight, and (3) to
(6) is the same.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aqueous liquid shower gel composition comprising a fatty acid soap (formed, for example, from an alkali metal source and a fatty acid), an anionic surfactant and an amphoteric / zwitterionic surfactant.

[0008] The liquid has the problem that the composition freezes under cold weather or cold storage conditions and cannot be pumped or dispensed from the container containing the liquid.

[0009] Unexpectedly, Applicants have discovered that isoprene glycol and dialkylene glycol (preferably
It has been found that the composition can be dispensed / pumped out even under the condition of freezing when dipropylene glycol) is used together in a specific amount.

More specifically, when the composition of the present invention is used, the composition can be used at a low temperature of about -5.degree.
Does not freeze even at low temperatures. The composition has a viscosity of 50-8000 cps (measured at 10 s ^-1 ), preferably
3000 cps, more preferably 100-1000 cp
s, most preferably 300-800 cps.

The viscosity is measured using a spindle 62 digital viscometer L
25 using VTDV-II (Brookfield)
The measurement was performed at 12 rpm for 30 seconds.

The composition of the present invention will be described in more detail.

[0013]Free fatty acids and neutralizers  The composition of the present invention comprises C₁₂~ C₂₂, Preferably C₁₂
~ C₁₈It may contain free fatty acids or mixtures thereof. use
Examples of possible fatty acids include lauric acid (C₁₂), Millis
Formic acid (C₁₄), Palmitic acid (C₁₆), Steari
Acid (C₁₈) Or mixtures thereof.

Usually, when the free fatty acid is neutralized with, for example, an alkali metal hydroxide or carbonate, a fatty acid soap is produced. Examples of compounds that can be used for neutralization are alkali metal hydroxides or carbonates.

When introduced as separate components, the fatty acids make up 1-20%, preferably 2-18%, by weight of the composition and the neutralizing agents make up 1-10%, by weight of the composition.

[0016]Soap  Alternatively, the soap may be introduced directly into the composition.

As used herein, the term "soap" is used in a general sense, ie an alkali metal or alkanol ammonium salt of an aliphatic alkane or alkene monocarboxylic acid. For the purposes of the present invention, sodium cations, potassium cations, mono-, di- or triethanolammonium cations, or combinations thereof, are preferred. Usually, sodium soap is used in the compositions of the present invention, but about 1 to about 25% of the soap may be potassium soap. Soaps useful in the present invention are known alkali metal salts of natural or synthetic fatty acids (alkanoic or alkenoic acids) having about 12 to 22 carbon atoms, preferably about 12 to about 18 carbon atoms. These soaps can be described as alkali metal carboxylate of acrylic hydrocarbons having about 12 to about 22 carbon atoms.

Soaps having the fatty acid distribution of coconut oil provide the lower end of the broad molecular weight range. Soaps having a fatty acid distribution of peanut oil or rapeseed oil, or hydrogenated derivatives thereof, provide the upper end of a wide molecular weight range.

It is preferred to use a soap having a fatty acid distribution of coconut oil, tallow or a mixture thereof. Because these are more readily available fats. The proportion of fatty acids having at least 12 carbon atoms in the coconut oil soap is about 85%. Mixtures of palm oil, when used, for example tallow main chain length is C ₁₆ or more, palm oil or non-tropical nut oils, the ratio is higher. Preferred soaps for use in the compositions of the present invention include:
It contains at least about 85% fatty acids having about 12-18 carbon atoms.

All or part of the coconut oil used for the soap is composed of other "high-alluric" oils, ie at least 50% of the total fatty acids are composed of lauric acid, myristic acid or mixtures thereof. Oils and fats. Common examples of such oils are tropical nut oils of coconut oil, such as palm kernel oil, babas oil.
u oil), Brazilian palm oil (ouricuri oil), tucan oil (tucum oil), cohune nut oil (cohune nut oil),
Muru-muru oil, jaboti kernel oil (jabot)
y kernel oil), khahan kernel oil,
Dikanut oil and ucuhuba b
utter).

A preferred soap is a mixture of about 15 to about 20% coconut oil and about 80 to about 85% tallow. The mixture contains about 95% fatty acids having about 12 to about 18 carbon atoms. The soap, fatty acid content of about 85% _C 12 -C
It can be made from coconut oil which is ₁₈ chain long.

The soap may contain unsaturation according to market acceptable standards. Excessive unsaturation is usually avoided.

The soap is a classical reaction boil method in which natural oils (eg, tallow, coconut oil, or equivalent) are saponified with alkali metal hydroxides using procedures known to those skilled in the art. Or it can be produced by modern continuous soap production methods. Alternatively, the soap neutralizes fatty acids (eg, lauric acid (C ₁₂ ), myristic acid (C ₁₄ ), palmitic acid (C ₁₆ ) or stearic acid (C ₁₈ )) with an alkali metal hydroxide or carbonate. Can be manufactured.

[0024]Anionic surfactant  Available anionic surfactants are aliphatic sulfonates
(Eg, primary alkane (eg, C₈~ C₂₂) Sur
Phonate, primary alkane (eg, C₈~ C_{2 2}) This
Rufonate, C₈~ C₂₂Alkenesulfonate, C₈
~ C₂₂Hydroxyalkanesulfonate or alk
Luglyceryl ether sulfonate (AGS)) or
Aromatic sulfonates (eg, alkylbenzene sulfo
Nate).

The anionic surfactant is an alkyl sulfate (for example, a C ₁₂ -C ₁₈ alkyl sulfate).
Alternatively, it may be an alkyl ether sulfate (including an alkyl glyceryl ether sulfate).
Some alkyl ether sulfates have the formula: RO (C
H ₂ CH ₂ O) _n SO ₃ M (where R is a carbon number of 8 to 1)
8, preferably alkyl or alkenyl having 12 to 18 carbon atoms, n is an average value of 1.0 or more, preferably 3 or more, and M is a solubilizing cation such as sodium,
Potassium, ammonium or substituted ammonium). Ammonium and sodium lauryl ether sulfate are preferred.

Anionic surfactants include alkyl sulfosuccinates (including mono- and dialkyl (eg, C ₆ -C ₂₂ ) sulfosuccinates), alkyl and acyl taurates, alkyl and acyl sarcosinates, sulfo there acetate, C ₈ -C _{2 2} alkyl phosphates and phosphates, alkyl phosphate esters and alkoxyalkyl phosphate esters, acyl lactates, C ₈ -C ₂₂ monoalkyl succinates and maleates, sulfo acetates alkylglucosides and acyl isethionates You may.

The sulfosuccinate has the formula: R ⁴ O ₂ CC
H ₂ CH _(SO 3 M) monoalkyl sulfosuccinates having the CO ₂ M, and the ^formula: R 4 CONHCH ₂ CH ₂
O ₂ may be CCH ₂ CH _(SO 3 M) amide -MEA sulfosuccinates having CO ₂ M. Where R ⁴
Is _C 8 _{-C 22} alkyl, M is a solubilizing cation.

Sarcosinate has the general formula: R ¹ CON
(CH ₃ ) CH ₂ CO ₂ M (where R ¹ is C ₈ -C ₂₀
Alkyl and M is a solubilizing cation).

The taurate is usually represented by the formula: R ² CONR ³ C
H ₂ CH ₂ SO ₃ M (wherein, ^{R 2} is _C 8 _{-C 20} alkyl, ^{R 3} is _C 1 -C ₄ alkyl, M is a is solubilizing cation) are identified by.

Particularly preferred are C ₈ -C ₁₈ acyl isethionates. The ester is produced by reacting an alkali metal isethionate with a mixed aliphatic fatty acid having 6 to 18 carbon atoms and an iodine value of less than 20. At least 75% of the mixed fatty acids have 12-18 carbon atoms and up to 25% have 6-10 carbon atoms.

When an acyl isethionate is present,
It usually comprises about 10 to about 70% by weight of the total amount of the bar composition. Preferably, this component is present at about 30 to about 60%.

The acyl isethionate may be an alkoxylated isethionate as described in Ilardi et al., US Pat. No. 5,393,466, which is incorporated herein by reference. This compound has the general formula:

[0033]

Embedded image (Wherein, R is alkyl having 8 to 18 carbon atoms, and m is 1
X and Y are hydrogen or a carbon number of 1 to 4
And M ⁺ is a monovalent cation, such as sodium, potassium or ammonium.

The anionic surfactant is usually used in the composition in an amount of 1 to
One or more anionic surfactants, which make up 20% by weight, preferably 5 to 15% by weight, may be used.

A particularly preferred anionic surfactant is an alkali metal (eg, sodium) lauryl ether sulfate (SLES).

[0036]Amphoteric surfactant  The amphoteric surfactant that can be used in the present invention is at least
Contains one acid group. This group can be a carboxylic acid group or a sulfo
It can be an acid group. The amphoteric surfactant contains quaternary nitrogen,
Therefore, it is a quaternary amic acid. Amphoteric surfactants are usually carbon
It should contain an alkyl or alkenyl group of the number 7 to 18.
is there. Such amphoteric surfactants generally include all of the following.
Follow the body structural formula.

[0037]

Embedded image In the above formula, R ¹ is alkyl or alkenyl having 7 to 18 carbon atoms, R ² and R ³ are each independently alkyl, hydroxyalkyl or carboxyalkyl having 1 to 3 carbon atoms, and m is 2 to 4 in it, n is 0 to 1, X is alkylene of 1 to 3 carbon atoms which is optionally substituted with hydroxy, Y is -CO ₂ - or -SO ₃ - is.

Suitable amphoteric surfactants within the above general formula include those of the formula:

[0039]

Embedded image A simple betaine with and formula:

[0040]

Embedded image Amide betaines having the formula: Here, n is 2 or 3.

In the above formulas, R ² and R ³ have the same meanings as described above. R ¹ is in particular a C ₁₂ alkyl radical derived from coconut such that at least １ ／, preferably at least ／ of the radicals R ¹ have from 10 to 14 carbon atoms and C 1.
It can be a mixture of ₁₄ alkyl groups. Preferably, R ²
And R ³ is methyl.

The amphoteric surfactant has the formula:

[0043]

Embedded image Wherein m is 2 or 3, or-(CH ₂ ) ₃ SO ₃ -is

Embedded image May be substituted.

In the above formula, R ¹ , R ² and R ³ are as defined above.

Optionally, nonionic and cationic surfactants as known to those skilled in the art can be used.

[0046]Isoprene glycol (IPG)  Isoprene glycol is present in an amount of 0.1 to 7% by weight of the composition,
Preferably from 0.5 to 5% by weight, more preferably from 1.0 to 5% by weight.
It should be used in an amount of 5% by weight. About 9% by weight
Even if a high amount is used,
Note that sopropylene glycol does not prevent freezing
Should. The ratio of IPG: DAG (described below) is 1:
The ratio is 8 to 7: 2, preferably 1: 8 to 5: 4.

[0047]Dialkylene glycol (DAG)  Dialkylene glycol (preferably dipropylene glycol)
Recall) from about 1.5 to about 8.5% by weight, preferably
Should be used in an amount of about 3.0 to about 8% by weight,
Is as described above.

[0048]Optional ingredients  Further, the composition of the present invention may include the following optional components.

Organic solvent (eg, ethanol);
Viscous agents (eg, carboxymethylcellulose, silica silicate)
Luminium magnesium, hydroxyethyl cellulose
, Methylcellulose, carbopol, glucamide,
Or Rhone Poulenc Antil (registered trademark)
Mark)); fragrance; sequestering agent (for example, 0.01 to
Ethylene in an amount of 1%, preferably 0.01-0.05%
Tetrasodium diaminetetraacetate (EDTA), EHD
P or mixtures thereof); and coloring agents, opacifiers and pearls
Brighteners (eg, zinc stearate, mag stearate)
Nesium, TiO ₂, EGMS (ethylene glycol
Nostearate) or Lytron 621 (Styr)
/ Acrylate copolymer)). All of these ingredients
To enhance the appearance or cosmetic properties of the product
Useful.

The composition further comprises an antimicrobial agent (eg, 2-
Hydroxy-4,2 ′, 4′-trichlorodiphenyl ether (DP300)), preservatives (eg, dimethylol dimethylhydantoin (Glydant XL 10)
0), parabens, sorbic acid, etc.).

The composition may also include coconut acyl mono- or diethanolamide as a foam enhancer, and strong ionized salts (eg, sodium chloride and sodium sulfate) may be advantageously used.

If appropriate, antioxidants such as butylated hydroxytoluene (BHT) can be advantageously used in amounts of about 0.01% or more.

Cationic conditioners that can be used include Quatrisoft LM-200 Polyq
uaternium-24, Merquat Plus
3330-Polyquaternium 39, and Jaguar® type conditioners.

Polyethylene glycols that can be used include Polyox WSR-205 PEG 14M, Polyox WSR-N-60K PEG 45M, or Polyox WSR-N-750 PEG 7M. Also included are PEGs having a molecular weight of 300 to 10,000 daltons, such as those commercially available from Union Carbide under the trademark CARBOWAX SENTRY.

[0055] Thickeners that may be used include Amerchol.
Polymer HM 1500 (registered trademark) (nonoxynilhydroxyethylcellulose), Glucam
DOE 120 (PEG120 methylglucose dioleate), Rewo manufactured by Rewo Chemicals
derm® (PEG modified glyceryl cocoate, palmate or tallowate), Goldsch
Midt.RTM. 141 from Midt Inc. is included.

Another optional ingredient that may be added is a deflocculant as taught in US Pat. No. 5,147,576 to Montague, which is hereby incorporated by reference.

Other components that can be incorporated are exfoliants (eg,
Polyoxyethylene beads, walnut shells and apricot seeds).

The composition may also comprise from 0.1 to 15% by weight, preferably from 1 to 10% by weight, of a structuring agent. The structurant may be used to avoid adding external structurants (eg, crosslinked polyacrylates and clays) when suspended particles are desired, and to provide the attributes desired by the consumer. it can.

Except for the examples and comparative examples, and unless otherwise indicated, all numbers herein referring to materials, conditions or amounts or ratios of reactions, physical properties and / or uses of materials are referred to as " It should be understood that the term "about" is appended.

As used herein, the term “comprising”
It includes the presence of the listed requirements, integers, steps, components, but does not exclude the presence or addition of one or more of the requirements, integers, steps, and components.

[0061]

【Example】

The following examples further illustrate the invention but do not limit it in any way.

All percentages are by weight unless otherwise indicated.

[0064]Examples 1-2  The following composition was produced as follows.

[0065]

[Table 1]

[0066]Production method  1) Add a mixture of potassium hydroxide and water to 70-85 ° C.
Heated (mixture 1). 2) Fatty acids, BHT, SLE until completely fluid
A mixture of S, IPG, DPG and glycerin was added to 70-8
Heated to 5 ° C. (mixture 2). 3) Mix 2 was added to Mix 1 with stirring
(Mixture 3). 4) EGDS was added to Mixture 3. 5) Water, EDTA, CAPB and most cationic
After mixing the materials and heating to 60 ° C., add to mixture 3
Was. 6) Mixture 3 was cooled to 45 ° C. 7) While stirring, add IPG, 0.01% additional click
The ionic substance and water were separately mixed (mixture 4). 8) Add Mix 4, Preservative and Fragrance to Mix 3,
Cooled to 35 ° C.

[0067]Example 3  For compositions containing IPG and DPG, soap / S
The following data were obtained for the LES / betaine system.

[0068]

[Table 2]

As is clear from the above examples, low temperature stability and pumpability are improved only when both IPG and DPG are used within the range of critical parameters.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Iwamoto Yukiko 38, Hagadai, Haga-cho, Haga-gun, Tochigi Prefecture, Japan Nippon Reaver BV Innovation Center (72) Inventor Kobayashi Mitsunobu Haga-gun, Haga-gun, Tochigi Prefecture Town Hagadai 38, Nippon Reeve BV Innovation Center

Claims (8)

[Claims] (A) 1-20% by weight of free fatty acid or a mixture of free fatty acids, (b) 1-20% by weight of an alkali metal source, (c) 1-20% by weight of anionic surfactant (s) A liquid shower gel composition comprising: (d) 1-15% amphoteric / zwitterionic surfactant; (e) about 1-7% isoprene glycol; and (f) about 2-8% dipropylene glycol. . 2. (a) 1 to 22% by weight of fatty acid soap or fatty acid soap mixture, (b) 1 to 20% by weight of anionic surfactant (s), (c) 1 to 15% of amphoteric / zwitterion A liquid shower gel composition comprising a surfactant, (d) about 1-7% isoprene glycol, and (e) about 2-8% dipropylene glycol. Wherein the alkali metal source is an alkali metal hydroxide, alkali metal carbonates, mono-, - di - or triethanolamine salts claims, selected from the group consisting of C ₂ -C ₄ alkylamine salts and mixtures thereof Item 10. The composition according to Item 1. 4. The composition according to claim 3, wherein the alkali metal is sodium or potassium. 5. The composition according to claim 1, wherein the composition does not freeze at a temperature above -10 ° C. 6. The composition according to claim 5, wherein the composition does not freeze at temperatures above -5 ° C. 7. The composition according to claim 1, which has a viscosity of 50 to 8000 cps. 8. The composition according to claim 7, which has a viscosity of 100 to 2000 cps.