JP2000328454A - Transparent liquid softening agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a transparent liquid softening agent without formulating a specific additive therewith. SOLUTION: This transparent liquid softening agent at pH 1.5-6.0 comprises the following components (a) to (c): (a) 5-25 wt.% of an acid salt of a quaternary ammonium compound or a tertiary amine compound having one or more ester groups and two or more 11-20C alkyl groups or 11-20C alkenyl groups in one molecule, (b) 0.1-15 wt.% of one or more kinds selected from the following compounds (b-1) and (b-2): (b-1) an acid salt of a quaternary ammonium compound or a tertiary amine compound having one 11-20C alkyl group or 11-20C alkenyl group in the molecule and (b-2) an amphoteric surfactant having one 6-20C alkyl or 6-20C alkenyl group in the molecule and (c) 0.05-2.0 wt.% of an 8-20C fatty acid or its salt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid softener which is transparent in appearance.

[0002]

2. Description of the Related Art A conventional liquid softener is dispersed in water as particles having a particle size of 0.1 to 10 μm because a soft base is hardly soluble in water.
It becomes cloudy in appearance. Regarding the transparency of the softener,
JP-A-3-27180 describes a technique for blending a quaternary ammonium compound with a specific organic acid to make it transparent, and JP-A-2-300382 discloses a specific non-ionic compound. A technique for blending a polymer compound is disclosed. However, these softeners contain a compound other than the softening base for transparency, and thus limit the flexibility of the composition. An object of the present invention is to provide a transparent softener having a high degree of freedom in the composition.

[0003]

The present invention provides the following (a) to (d):
It is intended to provide a transparent liquid softener containing component (c) and having a pH of 1.5 to 6.0. (A) an acid salt of a quaternary ammonium compound or a tertiary amine compound having one or more ester groups and two or more alkyl groups or alkenyl groups having 11 to 20 carbon atoms in the molecule 5 to 25% by weight (b ) One or more selected from the following compounds (b-1) and (b-2) 0.1 to 15% by weight (b-1) having one alkyl group or alkenyl group having 11 to 20 carbon atoms in the molecule Acid salts of quaternary ammonium compounds or tertiary amine compounds (b-2) amphoteric surfactant having one alkyl or alkenyl group having 6 to 20 carbon atoms in the molecule (c) fatty acid having 8 to 20 carbon atoms Or a salt thereof 0.05 to
2.0% by weight In the transparent softener of the present invention, “transparent” means that the optical path length is 10 m.
m means a cell having a light transmittance of 30% or more at a wavelength of 660 nm when ion-exchanged water is used for a control cell and a quartz cell of m.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The component (a) used in the present invention comprises:
At least one ester group and at least two carbon atoms in the molecule
Having 1 to 20 alkyl groups or alkenyl groups,
It is an inorganic or organic acid salt of a quaternary ammonium compound or a tertiary amine compound. More preferably, the carbon number is 11
These compounds have two to 20 alkyl groups or alkenyl groups, and examples of such compounds include compounds represented by general formulas (I) and (II).

[0005]

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Wherein R ¹ and R ^{4 each} represent an alkyl or alkenyl group having 11 to 20 carbon atoms, and X and Y represent —CO
^{O -, - CONR 7 -,} - OCO -, - indicates NR ⁷ CO-, X, at least one of Y is -COO-. Here, R ⁷ represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or a hydroxyalkylene group. Also, R ² , R ⁵
Is an alkylene group having 1 to 5 carbon atoms, and R ³ and R ^{6 each} represent an alkyl group or a hydroxyalkylene group having 1 to 3 carbon atoms, or may be R ¹ —X—R ² —. Z is a monovalent or divalent anion, preferably C
l ⁻ , SO ₄ ²⁻ , HSO ₄ ⁻ , R ^′ OSO ₃ ⁻ (R ^′ is an alkyl group having 1 to 3 carbon atoms), R ^″ COO ⁻ (R ^″ is a straight chain having 8 to 18 carbon atoms) Alkyl group). Note that this does not apply when the softening agent is ion-exchanged with another component. More specifically, the following compounds (1) to (4) can be mentioned.

[0007]

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[In the compounds (1) to (4), R ⁸ is an alkyl or alkenyl group having 11 to 17 carbon atoms;
Further, an alkyl group having 15 to 17 carbon atoms is more preferable. Z ^′ is Cl ⁻ , SO ₄ ²⁻ , HSO ₄ ⁻ , R ^′ OSO ₃ ⁻
(R ^′ is an alkyl group having 1 to 3 carbon atoms), R ^″ COO
^- (R ^″ is a linear alkyl group having 8 to 18 carbon atoms). Further, the following compound (5) may be used in addition to the compounds represented by the general formulas (I) and (II).

[0009]

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[In the compound (5), R ⁸ and Z ^′ are as described above. In the present invention, compounds (1) and (3) each having an ester group and an amide group or a mixture thereof are particularly preferable from the viewpoints of flexibility and transparency. The component (a) is preferably blended in an amount of 5 to 20% by weight from the viewpoint of a softening effect.

As the component (b-1) of the present invention, there can be mentioned compounds represented by the following general formulas (III) to (VI).

[0012]

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Wherein R ⁹ represents an alkyl group or an alkenyl group having ^{11 to 20} carbon atoms, and X ^′ represents —COO—, —C
ONR ¹⁴ —, —OCO—, and —NR ¹⁴ CO—, wherein R ¹⁴ represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a hydroxyalkylene group. R ¹⁰ has 1 to 5 carbon atoms.
Wherein R ¹¹ , R ¹² and R ¹³ have 1 to 1 carbon atoms
3 represents an alkyl group or a hydroxyalkylene group. Z
Is as described above. More specifically, the following compounds (6) to (11) can be mentioned.

[0014]

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[In the compounds (6) to (11), R ¹⁵ is an alkyl or alkenyl group having 12 to 18 carbon atoms, and more preferably an alkyl group having 16 to 18 carbon atoms. R ¹⁶ is an alkyl group or alkenyl group having 11 to 17 carbon atoms, and more preferably an alkyl group having 15 to 17 carbon atoms. Z ^′ is as described above. Further, examples of the component (b-2) of the present invention include compounds represented by the following general formulas (VII) and (VIII).

[0016]

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Wherein R ¹⁷ is an alkyl or alkenyl group having 6 to 20 carbon atoms, R ¹⁰ , R ¹¹ , R ¹² and X ^′ are as described above, and W is COO—, SO ₃ —, OSO ₃ —. More specifically, the following compounds (12) to (16) can be exemplified.

[0018]

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[In the above compounds (12) to (16), R ¹⁸
Is an alkyl group or an alkenyl group having 7 to 16 carbon atoms. The component (c) of the present invention is a fatty acid having 8 to 20 carbon atoms or a salt thereof, and specifically, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid,
Oleic acid or a mixture thereof, and one or more selected from lauric acid, stearic acid, and oleic acid are particularly preferable. In addition, palm oil, palm oil, palm kernel oil,
Also preferred are fatty acids having an alkyl composition derived from tallow. In the present invention, the component (b) is preferably contained in an amount of 0.1 to 0.1.
Although it is contained in an amount of 5 to 10% by weight, when only the component (b-1) is used, the component (b-1) is preferably (b-1) with respect to the component (a) in terms of transparency and stability. )component/
Component (a) = 20/80 to 60/40 (weight ratio), preferably 40/60 to 60/40. Also,
When only the component (b-2) is blended, the content of the component (b-2) is preferably 0.5 to 3% by weight in the softener in terms of transparency and stability. When the components (b-1) and (b-2) are used in combination, the component (b-1) is preferably component (b-1) / component (a) from the viewpoint of transparency and stability. = 0.3 / 99.7 to 60/40 (weight ratio), more preferably 0.5 / 99.5 to 60/40.
And the component (b-2) is preferably incorporated in the softener in an amount of 0.5 to 5% by weight, more preferably 0.5 to 3% by weight.

The component (c) is preferably incorporated in the softener in an amount of 0.05 to 1.5% by weight from the viewpoint of stability. In particular, when only the component (b-1) is blended, the component (c) is preferably [component (a) + component (b-1)] / component (c) =
85/15 to 99.9 / 0.1, more preferably 90 /
10-99.5 / 0.5, most preferably 90/10
It is blended at a ratio of 99/1. When only the component (b-2) is blended, the component (c) is preferably component (a) / component (c) = 90/10 to 99.9 / 0.1, more preferably 93/7 to 0.1. 99.5 / 0.5, most preferably 95/5 to 99.5 / 0.5. When the components (b-1) and (b-2) are used together, the component (c) is preferably [component (a) + (b-1)].
Component] / (c) component = 85/15 to 99.9 / 0.1,
More preferably, it is blended at a ratio of 90/10 to 99.5 / 0.5, most preferably at a ratio of 90/10 to 99/1.

The transparent softener of the present invention further comprises, as a component (d), an alkylene oxide adduct of an alcohol or amine having 8 to 18 carbon atoms (the number of moles of alkylene oxide added is 8 to 60, preferably 15 to 40). The content of 0.3 to 10% by weight, preferably 0.5 to 7% by weight is preferable in terms of transparency and stability.

As the component (d), the following compound (17)
To (20). ^{_{R 20 -O- (C 2 H 4}} O) p -H (17) [ wherein, R ²⁰ is an alkyl group having 8 to 18 carbon atoms, p
Is a number from 8 to 60, preferably from 20 to 40. _{^{] R 20 -O- (C 2 H}} 4 O) q (C 3 H 6 O) r -H (18) [ wherein, R ²⁰ is an alkyl group having 8 to 18 carbon atoms, q
And r are each independently 2 to 40, preferably 5 to 40
And ethylene oxide and propylene oxide may be random or block adducts. ]

[0023]

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Wherein R ²⁰ is an alkyl group having 8 to 18 carbon atoms, and the sum of s and t is 5 to 60, preferably 5 to 60.
The number is forty. The transparent liquid softener of the present invention may contain components such as fragrances, antibacterial agents, and pigments that are usually added to such an extent that they do not hinder transparency. However, calcium chloride, which is usually blended in a softener as a viscosity modifier and an anti-gelling agent, hinders transparency, so it should be kept at 500 ppm or less, and it is desirable that substantially no calcium chloride be added. However, surfactants such as fatty acid salts include sodium salts and potassium salts, but the inorganic salts mixed into the composition by use of such surfactants are not limited to the above. In addition, nonionic compounds having at least one alkyl or alkenyl group having 8 to 20 carbon atoms other than the component (d), such as triglyceride and diglyceride, which are often compounded in view of flexibility and stability, are preferred. , Monoglyceride, pentaerythritol mono-, di-, triester, sorbitan ester and other polyhydric alcohol fatty acid esters are compounded in an amount of 1
% By weight or less, and it is preferable not to mix them substantially in terms of transparency.

Further, in the present invention, it is desirable from the viewpoint of clarification that a solvent component such as ethanol or isopropanol which is usually added is not substantially added. However, when an acid salt of a quaternary ammonium compound or a tertiary amine is produced, since ethanol or isopropanol is generally used as a reaction solvent, 1 to 30% by weight is contained in the acid salt of a quaternary ammonium compound or a tertiary amine. Solvent is mixed. For this reason, when using such a soft base, the above-mentioned solvent is included in the composition of the present invention, and such a solvent is contained in the composition in an amount of 5% by weight or less, preferably 3% by weight or less, More preferably, the content is desirably 1% by weight or less.

The pH of the liquid softener composition of the present invention is from 1.5 to 6.0, preferably from 1.5 to 5.0, from the viewpoint of stability.
It is. Outside of such a range, the ester bond of the flexible base is undesirably decomposed during storage.

The method for preparing the transparent liquid softener of the present invention is not particularly limited, but at least the components (a), (b), and (c) and water of the compounding components of the liquid softener are 50 to 8%.
After mixing at 0 ° C., cool to 0-30 ° C. and heat again to
After leaving for 1 to 60 minutes at 0 to 80 ° C, 0 to 3 again
The method of preparing by cooling to 0 ° C. is the preferred production method that gives the most transparency. The specific production method is described below. Step (A): Water is put into a stirring tank equipped with a mixer having stirring blades, and mixed while heating to 55 to 80 ° C, preferably 55 to 70 ° C by a water bath. The components (a), (b) and (c) and, if desired, a fragrance, a dye or an antibacterial agent are sequentially added, and the pH is adjusted to a desired value with an acid such as sulfuric acid or hydrochloric acid or a base such as sodium hydroxide. 50-8
Mix at 0 ° C., preferably 55-70 ° C., until the contents are sufficiently uniform. Next, the contents are reduced to 0 using a refrigerant or the like.
Cool to ３０30 ° C. The cooling rate is preferably 1 to 20 ° C./min. When the component (d) is used in combination, it is preferable to mix it in this step. Step (B); following step (A), the mixture is again
To 80 ° C, preferably 55 to 70 ° C. Once the desired temperature has been reached, 1-30 minutes, preferably 1 minute
Stir and mix for ~ 15 minutes, then cool to 30 ° C or less. The cooling rate at this time is 3 ° C./min to 20 ° C./min, preferably 5 ° C./min to 15 ° C./min, and cooling is performed using a refrigerant or the like. In the case of blending the component (b-2), it is preferable to blend the component immediately before the step (B) in order to give a more transparent feeling.

In the present invention, transparency can be efficiently imparted to the liquid softener by repeating heating and cooling twice as described above.

[0029]

According to the present invention, a transparent liquid softener having a high degree of freedom in compounding can be provided.

[0030]

EXAMPLES Examples 1 to 5 and Comparative Examples 1 to 3 1. Synthesis of flexible base 1-1. Synthesis of flexible base (a-1)

[0031]

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[R; a saturated alkyl group having 17 and 15 carbon atoms mixed (17 carbon atoms: 15 carbon atoms = 60/40;
Weight ratio)] A known method using an adduct of N-methylethanolamine and acrylonitrile [J. Org. Chem., 26 ,
3409, (1960)] and N- (2-hydroxyethyl) -N-methyl-1,3-propylenediamine 6
6 g and 284 g of stearic acid / palmitic acid mixed fatty acid (molar ratio 60/40) were charged into a flask, and the temperature was raised to 180 ° C. The mixture was heated at that temperature for about 10 hours while distilling off generated water. After the completion of the reaction, the resultant was cooled to room temperature to obtain an amine compound (a-1 ′). Next, (a-1 ′) was dissolved in an aqueous hydrochloric acid solution equivalent to the amine, and the resulting aqueous solution was freeze-dried to obtain (a-1).

1-2. Synthesis of flexible base (a-2)

[0034]

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[R: a saturated alkyl group having a mixture of 17 and 15 carbon atoms (17 carbon atoms: 15 carbon atoms = 60/40;
(Weight ratio)] 300 g of the amine compound (a-1 ′) synthesized in 1-1 was dissolved in 60 g of 8-acetylated sucrose-modified ethanol,
The autoclave was charged, and 28 g of methyl chloride was injected. After reacting at 100 ° C. for 8 hours, the 8-acetylated sucrose-denatured ethanol was distilled off under reduced pressure to remove the compound (a-
2) was obtained. (A-2) contained 1.3% by weight of 8-acetylated sucrose-denatured ethanol.

2. Preparation of Transparent Liquid Softener A softener having the composition shown in Table 1 was prepared by the following production method. 2-1. Details of compounding components (a) component; compound (a-1) synthesized by the above method
And (a-2) a component (b); (b-1) a component (b-1-1)

[0037]

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[R; a linear alkyl group having 17 and 15 carbon atoms mixed (17 carbon atoms: 15 carbon atoms = 60/4)
0, weight ratio)] (b-1-2)

[0039]

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[R; a linear alkyl group having 17 and 15 carbon atoms mixed (17 carbon atoms: 15 carbon atoms = 60/4)
(0, weight ratio)] (b-2) Component (b-2-1) In the compound (13), R ¹⁸ is a straight-chain alkyl having 11 carbon atoms. (B-2-2) The compound (16) In the formula, R ¹⁸ is linear alkyl having 12, 14, 16 carbon atoms, and C ₁₂ / C
₁₄ / C ₁₆ = 60/25/15 (c) component; (c-1) LUNAC S-50 (stearic acid, manufactured by Kao Corporation) (d) component; (d-1) lauryl alcohol to ethylene oxide (D-2) laurylamine and ethylene oxide on average 4 mol
0 mol added Other components (component (e)) (e-1) Calcium chloride (e-2) Exel 150 (mono, di, triglyceride mixture of stearic acid (mono: di: tri = 60: 35:
(5, weight ratio) manufactured by Kao Corporation) (e-3) Fragrance 2-2. Preparation Method of Liquid Softener Ion-exchanged water was placed in a 1 L glass beaker, and heated to 60 ° C. in a water bath. The components (a) to (e) were sequentially added with stirring, and the pH was adjusted to 3.0 with a N / 10 HCl solution. After mixing for another 30 minutes while maintaining the temperature at 60 ° C., the mixture was cooled to 30 ° C. or less while stirring with a water bath at 20 ° C. (cooling rate: 1.5 ° C./min).
When the component (b-2) was used, it was added after cooling.
Next, the mixture was heated again to 60 ° C. in a water bath, stirred for 5 minutes, and then rapidly cooled in a 5 ° C. water bath. It took about 4 minutes to reach a temperature below 30 ° C. (7.5 ° C./min). Finally, after cooling to a temperature of 20 ° C., stirring was stopped, and the mixture was allowed to stand for 1 hour, and then the transparency of the softener composition was evaluated. Transparency was evaluated using a UV-2500PC type measuring device manufactured by Shimadzu Corporation, a quartz cell having an optical path length of 10 mm, and a light transmittance at a wavelength of 660 nm when ion-exchanged water was placed in the control cell. did. Table 1 shows the results.

[0041]

[Table 1]

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideji Takata 1334 Minato, Wakayama-shi, Wakayama Prefecture Kao Research Laboratory F-term (reference) 4L033 AC02 BA14 BA17 BA45 BA71 BA86

Claims (3)

[Claims] 1. A composition containing the following components (a) to (c):
Is 1.5 to 6.0. (A) an acid salt of a quaternary ammonium compound or a tertiary amine compound having one or more ester groups and two or more alkyl groups or alkenyl groups having 11 to 20 carbon atoms in the molecule 5 to 25% by weight (b ) One or more selected from the following compounds (b-1) and (b-2) 0.1 to 15% by weight (b-1) having one alkyl group or alkenyl group having 11 to 20 carbon atoms in the molecule Acid salts of quaternary ammonium compounds or tertiary amine compounds (b-2) amphoteric surfactant having one alkyl or alkenyl group having 6 to 20 carbon atoms in the molecule (c) fatty acid having 8 to 20 carbon atoms Or a salt thereof 0.05 to
2.0% by weight 2. An alkylene oxide adduct of an alcohol or amine having 8 to 18 carbon atoms (8 to 60 moles of alkylene oxide added) of 0.3 to 10 as a component (d).
The transparent liquid softener according to claim 1, which is contained by weight. 3. A component of the liquid softener according to claim 1 or 2, wherein at least component (a), component (b) and component (c).
The component and water are mixed at 50 to 80 ° C, cooled to 0 to 30 ° C, heated again, left at 50 to 80 ° C for 1 to 60 minutes, and then cooled to 0 to 30 ° C again. Or a method for producing the transparent liquid softener according to 2.