JP2006117774A - Thickener for detergent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thickener for a detergent, exhibiting excellent thickening properties in a body detergent such as a shampoo, a rinse and a body shampoo, and a detergent such as a kitchen detergent, and having excellent temporal stability and foamability. <P>SOLUTION: The thickener for the detergent, having the excellent thickening properties, and the excellent temporal stability and foamability is obtained by formulating a nonionic surfactant obtained by adding an alkylene oxide or an alkylene carbonate to an alkyl carbamate synthesized from alkylamines and an alkylene carbonate, with a detergent. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention has an excellent thickening property in body cleaners such as shampoos, rinses and body shampoos containing surfactants, or detergents such as kitchen detergents, and has excellent storage stability and foaming power. The present invention relates to a nonionic surfactant capable of providing a cleaning composition having the same.

  In general, body cleaning agents such as shampoos, rinses, body shampoos, face-washing foams, or cleaning agents such as kitchen detergents are required to have good cleaning power and high foaming power. As the main base of cleaning agents, alkylbenzene sulfonic acid, alkyl sulfate ester salt, polyoxyethylene alkyl ether ester salt, acylmethyl taurine salt, acyl glutamate, fatty acid soap and other anionic surfactants, alkyl betaines, Amphoteric surfactants such as alkylamide betaines and alkylsulfobetaines, and nonionic surfactants such as polyoxyethylene alkyl ethers and alkyl glycosides are used. These cleaning bases are used in combination.

However, many of the aqueous solutions have a relatively low viscosity, and it is necessary to make the product easy to use depending on the application. Thickeners are used as product viscosity modifiers, foam stabilizers, and storage stabilizers.

  Conventionally, diethanol fatty acid amide has been widely used as a thickener for these detergents, but its safety has been questioned and alternatives have been proposed. Patent Document 1 proposes monoethanol fatty acid amides, Patent Document 2 proposes N-alkyl alkanol fatty acid amides, Patent Document 3 proposes polyglycerol fatty acid esters, Patent Document 4 proposes propylene glycol fatty acid monoesters, and the like. It has been.

  However, the thickeners proposed so far have drawbacks in safety, workability, low temperature stability, foam stability and the like, and are still not fully satisfactory.

Japanese Patent Laid-Open No. 11-80785 (page 1-5) JP2002-285193 (Page 1-7) JP 2002-69486 (Pages 1-8) JP 06-031409 (Pages 1-7)

  The present invention has excellent thickening in body cleaning agents such as shampoos, rinses and body shampoos, or cleaning agents such as kitchen detergents, and further increases the viscosity for cleaning agents having excellent stability over time and foaming power. It is an object to provide an agent.

  As a result of intensive studies to solve the above problems, the present inventors have found that a nonionic surfactant obtained by further adding an alkylene oxide or an alkylene carbonate to an alkyl carbamate synthesized from an alkylamine and an alkylene carbonate solves this problem. The present invention has been found.

（式中、Ｒ_１、Ｒ_３はそれぞれ独立して炭素数６〜２４の水酸基を有しても良い直鎖または分岐鎖のアルキル基またはアルケニル基、Ｒ_２、Ｒ_４はそれぞれ独立して水素原子、または炭素数１〜３のアルキル基、またはヒドロキシエチル基を示す。Ａ_１、Ａ_２はそれぞれ炭素数２〜４のアルキレン基を示す。ｎ及びｍはそれぞれ独立して１≦ｎ≦２０、１≦ｍ≦２０を満足する整数を示す。） That is, this invention is a thickener for detergents which is a nonionic surfactant containing the following general formula (1) and / or general formula (2).

(In the formula, R _1, R ₃ independently represents an alkyl group or an alkenyl group which may linear or branched chain which may have a hydroxyl group having 6 to 24 carbon atoms, R _2, R ₄ is hydrogen independently Represents an atom, an alkyl group having 1 to 3 carbon atoms, or a hydroxyethyl group, A ₁ and A ₂ each represent an alkylene group having 2 to 4 carbon atoms, and n and m are each independently 1 ≦ n ≦ 20. 1 represents an integer satisfying 1 ≦ m ≦ 20.)

  A nonionic surfactant obtained by adding alkylene oxide or alkylene carbonate to the alkyl carbonate synthesized from the alkylamines of the present invention and alkylene carbonate, and having excellent viscosity, foaming power, and storage stability. A composition can be provided.

  The method for producing the nonionic surfactant represented by the general formula (1) and the general formula (2) according to the present invention includes, for example, an addition reaction between a long chain alkylamine and an alkylene carbonate, a long chain alkyl isocyanate and a glycol. It can be produced by further adding 1 to 20 moles of alkylene oxide or alkylene carbonate to the alkyl carbamate type compound obtained by the addition reaction. Specific examples of long chain alkylamines include octylamine, 2-ethylhexylamine, decylamine, laurylamine, myristylamine, palmitylamine, stearylamine, isostearylamine, oleylamine, behenylamine, coconut oil alkylamine, palm oil alkylamine , Palm kernel oil alkylamine, rapeseed oil alkylamine, beef tallow alkylamine, and fish oil alkylamine, but are not particularly limited thereto. The nonionic surfactants represented by the general formula (1) and the general formula (2) are produced as isomers in the product and may be mixed.

In the general formulas (1) and (2) according to the present invention, the linear or branched alkyl group or alkenyl group represented by R ₁ or R ₃ is, for example, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl. , Tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl group, and the like, but an alkyl group having 8 to 18 carbon atoms is preferable, and a single alkyl composition or a mixed alkyl composition may be used.

In addition, the alkyl groups represented by R ₂ and R ₄ in the general formulas (1) and (2) are hydrogen atoms, or have 1 to 3 carbon atoms (straight or branched) so as not to reduce foaming power. And preferably a methyl group or an ethyl group.

  Examples of the alkylene group having 2 to 4 carbon atoms in the general formulas (1) and (2) include an ethylene group, a propylene group, and a butylene group, and each of ethylene oxide, propylene oxide, and butylene oxide is an alkyl carbamate type. It can introduce | transduce by adding to a compound. N and m are integers satisfying 1 ≦ n ≦ 20 and 1 ≦ m ≦ 20, respectively. When multiple types of alkyleneoxy groups are introduced, the order of adding alkylene oxide or alkylene carbonate does not matter. Moreover, the form may be added in a block form or in a random form. Preferably, 1 ≦ n ≦ 7 and 1 ≦ m ≦ 7 in order to effectively improve the viscosity, foaming power, and storage stability of the cleaning composition. More preferably, 1 ≦ n ≦ 3 and 1 ≦ m ≦ 3. By introducing an alkyleneoxy group, in addition to thickening and the like, stability at low temperatures and bubble stability are improved.

  Specific examples of the components of the general formulas (1) and (2) include, for example, POE ethylene glycol N-octyl carbamate, POE propylene glycol N-octyl carbamate, POE / POP propylene glycol N-octyl carbamate, POE butylene glycol N-octyl carbamate, POE / POP butylene glycol N-octyl carbamate, POE glycerin N-octyl carbamate, POE / POP glycerin N-octyl carbamate, POE ethylene glycol N-dodecyl carbamate, POE propylene glycol N-dodecyl carbamate, POE butylene glycol N-dodecyl carbamate, POE glycerin N-dodecyl carbamate, POE ethylene glycol N-coconut oil alkyl carbamate, POP ethylene glycol N-coconut oil alkyl carbamate, POE / POP ethylene glycol N-coconut oil alkyl carbamate POE propylene glycol N-coconut oil alkyl carbamate, POE butylene glycol N-coconut oil alkyl carbamate, POE glycerin N-coconut oil alkyl carbamate, POE ethylene glycol N-octadecyl carbamate, POE ethylene glycol N-isooctadecyl carbamate, POE Examples include ethylene glycol N-palm kernel oil alkyl carbamate and POE butylene glycol N-dodecyl carbamate. POE and POP represent a polyoxyethylene group and a polyoxypropylene group, respectively.

  In addition, the polyoxyalkylene alkylene glycol N-alkyl carbamate of the present invention exhibits an excellent thickening effect when used in combination with anionic, cationic, nonionic and amphoteric active agents that serve as cleaning components of the cleaning agent. .

  As the surfactant used in the cleaning agent that is the subject of the present invention, anionic surfactants and amphoteric surfactants are mainly used. Examples of the anionic surfactant include alkylbenzene sulfonic acid, alkyl sulfate ester salt, polyoxyethylene alkyl ether ester salt, acylmethyl taurate salt, acyl glutamate salt, and fatty acid soap. Examples of amphoteric surfactants include alkylbetaines, alkylamidobetaines, and alkylsulfobetaines. In addition, nonionic surfactants such as polyoxyethylene alkyl ether and alkyl glycoside are used. These surfactants are used alone or in combination.

  When the thickener of the present invention is blended in the cleaning agent, the addition amount is in the range of 2 to 40% by weight based on the surfactant, depending on the formulation of the cleaning agent, the type of surfactant used and the target concentration. If used, the purpose can be achieved.

EXAMPLES Next, although an Example demonstrates this invention in detail, this invention is not limited to a following example, unless the meaning is exceeded.
<Cleaning agent base> The following surfactants were used in the test.
1) Polyoxyethylene (3) Sodium lauryl ether sulfate (hereinafter AES)
ALSCOPE TH-330 [manufactured by Toho Chemical Industry]
2) Sodium Lauroamphoacetate (hereinafter IMD)
Obazoline 662N [Toho Chemical Industries]
3) Cocamidopropyl betaine (hereinafter CAB)
Obazoline CAB-30 [manufactured by Toho Chemical Industry]
4) Sodium cocoyl methyl taurine (hereinafter AMT)
Neoscope CN-30 [manufactured by Toho Chemical Industry]

<Examples and Comparative Examples Thickener> The following thickeners were used in the test.
1) Polyoxyethylene (1) Ethylene glycol N-coconut oil alkyl carbamate (hereinafter CEC-E1)
Ethylene carbonate 1-mol equivalent and 0.9 mol equivalent coconut oil alkylamine were subjected to addition reaction by a known method to obtain ethylene glycol N-coconut oil alkyl carbamate. The resulting ethylene glycol N-coconut oil alkyl carbamate can be produced by subjecting 1.0 mole of ethylene oxide or ethylene carbonate to an addition reaction by a known method.
2) Polyoxypropylene (1) Polyoxyethylene (1) Ethylene glycol N-coconut oil alkyl carbamate (hereinafter CEC-E1P1)
Ethylene carbonate 1-mol equivalent and 1.0 mol equivalent coconut oil alkylamine were subjected to addition reaction by a known method to obtain ethylene glycol N-coconut oil alkyl carbamate. To the obtained ethylene glycol N-coconut oil alkyl carbamate, 1.0 mole equivalent of ethylene oxide or ethylene carbonate is subjected to an addition reaction by a known method, and 1.0 mole equivalent of propylene glycol or propylene glycol is further added. Can be manufactured.
3) Polyoxyethylene (1) Propylene glycol N-coconut oil alkyl carbamate (hereinafter CPC-E1)
Propylene carbonate and coconut oil alkylamine were reacted in the same manner, and 1.0 mol of ethylene oxide or ethylene carbonate was added to the resulting carbamate derivative to obtain the desired product.
4) Polyoxyethylene (3) Propylene glycol N-coconut oil alkyl carbamate (hereinafter CPC-E3)
Propylene carbonate and coconut oil alkylamine were reacted in the same manner, and 3.0 mol of ethylene oxide or ethylene carbonate was added to the resulting carbamate derivative to obtain the desired product.
5) Polyoxyethylene (1) Butylene glycol N-coconut oil alkyl carbamate (hereinafter CBC-E1)
Butylene carbonate and coconut oil alkylamine were reacted in the same manner, and 1.0 mol of ethylene oxide or ethylene carbonate was added to the resulting carbamate derivative to obtain the desired product.
6) Palm oil fatty acid diethanolamide (CDE)
Tohol N-220XM [manufactured by Toho Chemical Industry]
7) Palm oil fatty acid monoethanolamide (hereinafter CME)
To Hall N-120 [Toho Chemical Industries]
8) Propylene glycol monolaurate (hereinafter PL)
Riquemar PL-100 [made by Riken Vitamin]

<Test and evaluation> A cleaning agent base prepared by blending 2 to 3 types commonly used as a cleaning base was prepared, and the above eight types of thickeners were added to them to increase the viscosity and viscosity of the cleaning composition. Foam strength and storage stability were evaluated.

Table 1 shows the formulation and test results of polyoxyethylene (3) sodium lauryl ether sulfate / sodium lauroamphoacetate.
Table 2 shows the formulation and test results of polyoxyethylene (3) sodium lauryl ether sulfate / cocamidopropyl betaine.
Table 3 shows the formulation and test results of sodium cocoylmethyl taurate / polyoxyethylene (3) sodium lauryl ether sulfate / sodium lauroamphoacetate.

Description of Evaluation Method <Viscosity Test> Using a B-type viscometer (Bismetron viscometer VS-A1, manufactured by Shibaura System Co., Ltd.) at 25 ° C. Measurement was carried out with the number of revolutions being fixed at 12 rpm with a rotor of 1-4. The pH was adjusted to 6.5 with citric acid.
<Foaming power> The surfactant composition was adjusted to 0.25% by weight with ion-exchanged water and pH 6.5 with citric acid, and the height of the foam was measured at 40 ° C. using a household mixer.
<Storage stability> After leaving the surfactant composition at 20 ° C. and 0 ° C. for 1 week, the appearance was visually determined.
○: Uniform and transparent, no change △: Turbidity ×: Separation, sedimentation or crystal precipitation

Claims (2)

A thickener for a detergent containing a nonionic surfactant represented by the following general formula (1) and / or general formula (2).

(Wherein R ₁ and R ₃ are each independently a linear or branched alkyl or alkenyl group optionally having a hydroxyl group having 6 to 24 carbon atoms, R ₂ and R ₄ are each independently hydrogen. atom or an alkyl group having 1 to 3 carbon atoms or a hydroxy ethyl group _.A 1, _{a 2} is .n and m represents an alkylene group having 2 to 4 carbon atoms each independently 1 ≦ n ≦ 20,, 1 represents an integer satisfying 1 ≦ m ≦ 20.) A cleaning composition containing a nonionic surfactant represented by the general formula (1) and / or (2) of claim 1.