JP2006097183A - Aqueous softener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the production of an aqueous softener having transparency and stability. <P>SOLUTION: The aqueous softener comprising a dialkyldimethylammonium compound A and a fatty acid dimethylaminopropylamide compound B is provided. A solubilizer which is a surfactant or an alcohol is preferably further added to the components. Furthermore, the components are mixed with water and stirred by heating to prepare a transparent and stable aqueous solution of the softener. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an aqueous softener.

Conventionally, as a transparent liquid softening agent, a softening agent comprising a composition containing a quaternary ammonium compound having a fatty acid ester group and a quaternary ammonium compound having an alkyl group-modified fatty acid amide group (see, for example, Patent Document 1), or a fatty acid A softening agent (for example, see Patent Document 2) comprising a quaternary ammonium compound having an ester group and an alkyl group-modified fatty acid amide group is provided.
The softener is said to provide a clear aqueous solution.

JP 2000-328454 A Japanese Patent Application No. 2000-355876

  In order to obtain a transparent solution, the above conventional softener is prepared by mixing components and water at 50 to 80 ° C., then cooling to 0 to 30 ° C., heating again to 50 to 80 ° C., and again to 0 to 30 ° C. Therefore, a time-consuming manufacturing method of cooling was necessary.

こゝにＲ₁ 、Ｒ₂ は炭素数１０〜２０の直鎖または分岐アルキル基
Ａは塩基である
を有する４級アンモニウム化合物Ａと、
下記構造式

こゝにＲ₃ は炭素数１０〜２０の直鎖または分岐アルキル基
を有する３級アミン化合物Ｂとを含有する水性柔軟剤を提供する。
上記４級アンモニウム化合物Ａと上記３級アミン化合物Ｂとは９０：１０〜９５：５の質量比の範囲で含有されていることが望ましく、また上記水性柔軟剤には可溶化剤としてアニオン性界面活性剤および／またはノニオン性界面活性剤が含有されていることが望ましい。更に上記水性柔軟剤には可溶化剤として多価アルコールおよび／または一価アルコールが含有されていることが望ましい。 The present invention provides the following structural formula as means for solving the above-described conventional problems.

Where R ₁ and R ₂ are linear or branched alkyl groups having 10 to 20 carbon atoms, A is a base, and a quaternary ammonium compound A,
The following structural formula

In thisゝR ₃ provides an aqueous softener containing a tertiary amine compound B having a linear or branched alkyl group having 10 to 20 carbon atoms.
The quaternary ammonium compound A and the tertiary amine compound B are desirably contained in a mass ratio of 90:10 to 95: 5, and the aqueous softener has an anionic interface as a solubilizer. Desirably, an activator and / or a nonionic surfactant is contained. Further, the aqueous softener preferably contains a polyhydric alcohol and / or a monohydric alcohol as a solubilizer.

[Action]
In the aqueous softener of the present invention, particularly when a solubilizer is present, a transparent and stable aqueous solution can be obtained simply by adding the components to water and heating to about 60 to 80 ° C.

〔effect〕
Therefore, in the present invention, a transparent and stable softener can be obtained by a simple method.

こゝにＲ₁ 、Ｒ₂ は炭素数１０〜２０の直鎖または分岐アルキル基
Ａは塩基である
特に望ましいアルキル基Ｒ₁ 、Ｒ₂ としては、炭素数１２〜１５の分岐アルキル基がある。 The present invention is described in detail below.
[Quaternary ammonium compound]
The quaternary ammonium compound A used in the present invention is a dialkyldimethylammonium compound having the following structure.

R ₁ and R ₂ are linear or branched alkyl groups having 10 to 20 carbon atoms. A is a base. Particularly desirable alkyl groups R ₁ and R ₂ include branched alkyl groups having 12 to 15 carbon atoms.

こゝにＲ₃ は炭素数１０〜２０の直鎖または分岐アルキル基
特に望ましいアルキル基Ｒ₃ としては、炭素数１５〜２０の直鎖または分岐アルキル基である。 [Tertiary amine compound]
The tertiary amine compound B used in the present invention is a fatty acid dimethylaminopropylamide having the following structure.

Here, R ₃ is a linear or branched alkyl group having 10 to 20 carbon atoms. Particularly desirable alkyl group R ₃ is a linear or branched alkyl group having 15 to 20 carbon atoms.

[Solubilizer]
In order to easily dissolve the quaternary ammonium compound A and the tertiary amine compound B, which are the main components of the softener, in water, it is desirable to use a solubilizer. Examples of the solubilizer include an anionic surfactant and / or a nonionic surfactant, and a polyhydric alcohol and / or a monohydric alcohol.

  Examples of the anionic surfactant include higher alcohol sulfate (Na salt or amine salt), polyoxyalkylene alkyl ether sulfate, alkyl allyl sulfonate (Na salt or amine salt), sodium alkyldiphenyl ether disulfonate, alkyl naphthalene sulfone. There are anionic surfactants such as acid salts (Na salts or amine salts), alkyl naphthalene sulfonate condensates, alkyl phosphates, dialkyl sulphosuccinates, rosin soaps, fatty acid salts (Na salts or amine salts).

  Examples of the nonionic surfactant include polyoxyalkylene alkyl ether, polyoxyalkylene alkylphenol ether, polyoxyalkylene alkyl ester, polyoxyalkylene alkylamine, polyoxyalkylene alkylolamine, polyoxyalkylene alkylamide, sorbitan alkyl ester. And nonionic surfactants such as polyoxyalkylene sorbitan alkyl esters.

  A desirable anionic surfactant is polyoxyalkylene alkyl ether sulfate, and a desirable nonionic surfactant is polyoxyalkylene alkyl ether. More specifically, sodium polyoxyethylene lauryl ether sulfate, sodium polyoxypropylene lauryl ether sulfate, sodium polyoxyethylene stearyl ether sulfate, sodium polyoxypropylene stearyl ether sulfate, polyoxyethylene lauryl ether, polyoxypropylene lauryl ether, poly Examples include oxyethylene stearyl ether and polyoxypropylene stearyl ether.

  Examples of desirable polyhydric alcohols include ethylene glycol, propylene glycol, glycerin, sorbitol, trimethylolpropane, hexanetriol, trimethylolethane, and pentaerythritol. Desirable monohydric alcohols include, for example, ethyl alcohol, isopropyl alcohol, n -There are lower alcohols having 4 or less carbon atoms such as butyl alcohol, iso-butyl alcohol and t-butyl alcohol.

[PH regulator]
In the present invention, a pH adjusting agent may be used to adjust the pH of the softening agent if desired. As the pH regulator, organic acids such as succinic acid, citric acid, tartaric acid, phthalic acid, fumaric acid, malic acid and the like are usually used.
The softener of the present invention is usually adjusted to a pH range of 2-5.

(Preparation of softener)
The quaternary ammonium compound A and the tertiary amine compound B are usually mixed in a mass ratio of 90:10 to 95: 5. Within this ratio range, the softener has a good softening effect and transparent stability.
The desirable blending ratio when a solubilizer is used in combination is shown below.
Quaternary ammonium compound A 20-30% by mass
Tertiary amine compound B 1-3
Anionic surfactant 0.3-1.0 〃
Nonionic surfactant 5-10 〃
Polyhydric alcohol 10-20 〃
Monohydric alcohol 1-5 〃
pH regulator (organic acid) 1-2 〃
Water Residual The solid content of the quaternary ammonium compound A, tertiary amine compound B, anionic surfactant and nonionic surfactant is usually contained in an amount of 30 to 40% by mass in the softener solution.

  In order to prepare the softening agent, the above components are added to water and heated to 60 to 80 ° C., and stirred, mixed and dissolved. Stirring and mixing are usually performed for about 10 to 20 minutes, and a transparent and stable aqueous softener can be obtained in such a short time.

〔Example〕
The formulations shown in Table 1 below were heated to 70 ° C. and mixed with stirring for 10 minutes.

  The obtained aqueous softener is transparent and rich in stability. The transparency and stability of the softener were evaluated. For the evaluation of transparency and stability, a quartz cell having an optical path length of 10 mm was used with a Shimadzu UV-2500PC measuring instrument for a sample immediately after production and a sample when stored at room temperature for one month after production. The light transmittance at a wavelength of 2660 nm was determined. As a control, ion-exchanged water was used. The results are shown in Table 2.

  From the above results, it was confirmed that the softener of the present invention maintained good transparency over a long period of time.

  In the present invention, a transparent and stable aqueous softener can be easily produced.

Claims (4)

The following structural formula

Where R ₁ and R ₂ are linear or branched alkyl groups having 10 to 20 carbon atoms, A is a base, and a quaternary ammonium compound A,
The following structural formula

R ₃ is an aqueous softening agent characterized by containing a tertiary amine compound B having a linear or branched alkyl group having 10 to 20 carbon atoms in thisゝ.   The aqueous softener according to claim 1, wherein the quaternary ammonium compound A and the tertiary amine compound B are contained in a mass ratio of 90:10 to 95: 5.   The aqueous softener according to claim 1 or 2, wherein the aqueous softener contains an anionic surfactant and / or a nonionic surfactant as a solubilizer.   The aqueous softener according to claims 1 to 3, wherein the aqueous softener contains a polyhydric alcohol and / or a monohydric alcohol as a solubilizer.