JPH04334508A - Method for suppressing foaming quaternary ammonium compound - Google Patents

Abstract

PURPOSE:To efficiently suppress foaming without obstructing the fundamental characteristics of higher aliphatic quaternary ammonium compound having foaming properties at the time of the adaptation of the quaternary ammonium compound to an aqueous system by compounding specific higher aliphatic amine with the quaternary ammonium compound. CONSTITUTION:Higher aliphatic amine (e.g. dodecylamine) represented by formula, wherein R<4> is a 12-18C saturated or unsaturated straight chain aliphatic hydrocarbon group, R<5> and R<6> are respectively H or a 1-4C lower alkyl group which may be substituted with an amino group and Y is an acid residue is compounded with a higher aliphatic quaternary ammonium compound (e.g. lauryl benzyldimethylammonium chloride) in the amount of 0.05-10mol per 1mol of the quaternary ammonium compound. As a result, at the time of the adaptation of the quaternary ammonium compound to an aqueous system, foaming can be efficiently suppressed without obstructing the fundamental characteristics of the quaternary ammonium compound.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for suppressing foaming of a quaternary ammonium compound. More specifically, the present invention relates to a method for efficiently suppressing foaming that may occur when a higher aliphatic quaternary ammonium compound is added to various aqueous systems.

0002

[Prior Art] Quaternary ammonium compounds have been used as various industrial chemicals for a long time, and higher aliphatic quaternary ammonium compounds are used in agricultural chemicals, wood treatment agents, dispersants, surfactants, industrial chemicals, etc. It is widely used as a fungicide, algaecide, etc.

However, in applications targeting aqueous systems, such higher aliphatic quaternary ammonium compounds exhibit foaming properties, which poses a problem in that the objects to which they are added and the manner in which they are added are limited.

[0004] Conventionally, in aqueous systems and applications where such foaming is a problem, it has been necessary to use a higher aliphatic quaternary ammonium compound together with a silicone-based or high-boiling hydrocarbon oil-based antifoaming agent. was.

[0005]

However, since such silicone-based and high-boiling hydrocarbon oil-based antifoaming agents themselves have high COD, it is desirable to avoid their use as much as possible from an environmental standpoint.

Furthermore, silicone defoaming agents are expensive, and high-boiling hydrocarbon oil defoaming agents have a high viscosity and are relatively difficult to handle.

[0007] The present invention was made under such circumstances, and more particularly, it is an object of the present invention to provide a method for suppressing foaming of a quaternary ammonium compound, which solves the problems of conventional antifoaming agents.

[0008]

[Means for Solving the Problems] According to the present invention, when a quaternary ammonium compound having foaming properties is used in water, the following general formula (I):

[Formula R4 is a saturated or unsaturated linear aliphatic hydrocarbon group having 12 to 18 carbon atoms, and R5 and R6 each has 1 carbon atom, which may be substituted with a hydrogen atom or an amino group. ~
4 is a lower alkyl group, and Y represents an acid residue. ] Provided is a method for suppressing foaming of a quaternary ammonium compound, which comprises using a higher aliphatic amine represented by:

[0009] In order to achieve the above-mentioned object, the present invention takes a measure of blending a specific higher aliphatic amine represented by the above general formula (I).

The above-mentioned higher aliphatic amine is itself a compound that is not known as an antifoaming agent. Further, this invention provides that when such a higher aliphatic amine is blended when adding the quaternary ammonium compound to an aqueous system, the foaming properties of the quaternary ammonium compound can be improved without inhibiting the basic properties of the quaternary ammonium compound. It is based on the discovery of the fact that it can be significantly reduced.

[0011] A fourth material having foaming properties which is the object of the present invention.
The class ammonium compound means a quaternary ammonium compound having at least one higher aliphatic hydrocarbon group, and representative examples include the following formula (II):

[Formula, R is a saturated or unsaturated linear aliphatic hydrocarbon group having 12 to 18 carbon atoms, R1 is a lower alkyl group having 1 to 4 carbon atoms, or a lower alkyl group having 12 to 4 carbon atoms. 18 saturated or unsaturated linear aliphatic hydrocarbon groups, R2 has 1 carbon atom
~4 lower alkyl group or benzyl group, R3 represents a lower alkyl group having 1 to 4 carbon atoms, or R1,
All of R2 and R3 may be a pyridine group or a pyricol group via a nitrogen atom. However, R1 has 12 to 1 carbon atoms
8 saturated or unsaturated linear aliphatic hydrocarbon group, and R
Except when 2 is a benzyl group. X represents an acid residue. ] Compounds represented by: The above general formula (II
) Specific examples of quaternary ammonium compounds represented by: laurylbenzyldimethylammonium chloride, lauryltrimethylammonium chloride, cetylbenzyldimethylammonium chloride, cetyltrimethylammonium chloride, stearylbenzyldimethylammonium chloride, stearyltrimethylammonium chloride, lauryl Examples include pyridinium chloride, laurylpicolinium chloride, cetyltrimethylammonium saccharide, cetyltrimethylammonium bromide, tallow alkyltrimethylammonium bromide, dilauryldimethylammonium chloride, dicetyldimethylammonium chloride, distearyldimethylammonium chloride, and the like.

Specific examples of acid residues X include hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, oleic acid,
Mention may be made of residues such as naphthenic acid, adipic acid, lactic acid, citric acid or saccharin.

In the present invention, specific examples of higher aliphatic amine compounds represented by the general formula (I) include dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, oleylamine, tallow alkylamine, and coconut alkylamine. Primary amines such as amines; secondary amines such as dodecylmethylamine, hexadecylmethylamine, octadecylmethylamine, tallow alkylmethylamine, hardened tallow alkylmethylamine, coconut alkylmethylamine; dodecyldimethylamine, hexadecyldimethyl Tertiary amines such as amines, octadecyldimethylamine, coconut alkyldimethylamine, tallow alkyldimethylamine, hardened tallow alkyldimethylamine;
N-monosubstituted ethylene diamines such as dodecyl ethylene diamine, hexadecyl ethylene diamine, octadecyl ethylene diamine, oleyl ethylene diamine, tallow alkyl ethylene diamine; dodecyl trimethylene diamine, hexadecyl trimethylene diamine, octadecyl trimethylene diamine, oleyl trimethylene diamine, coconut trimethylene diamine , N-monosubstituted trimethylene diamine such as beef tallow alkyl trimethylene diamine, hardened beef tallow alkyl trimethylene diamine, and the like. Among these, it is preferable to use tertiary amines.

[0014] Among these amines, "coconut alkyl...amine" and "tallow alkyl...
・Amine”, “Hardened beef tallow alkyl...Amine”
means that the amine is a saturated or unsaturated linear aliphatic hydrocarbon group having 12 to 18 carbon atoms produced from coconut oil, coconut fat, beef tallow, etc. by known means. It means that it is a mixture of amines (mixed alkyl amines).

As a specific example of the acid residue Y, general formula (II
) The residues of the inorganic acid group and organic acid group shown for X can be mentioned.

Next, in order to suppress foaming by using a higher aliphatic amine compound represented by general formula (I) in combination with a quaternary ammonium compound, 0.05 to 1 aliphatic amine compound
It is suitable to mix 0, more preferably 0.1 to 5.

[0017] When adding these compounds to a circulating cooling water system or a seawater cooling system, each compound can be added individually in a predetermined amount at the same time, but it is preferable to mix them and use them as a one-component preparation. .

Quaternary ammonium compound and general formula (I)
If the higher aliphatic amine compound represented by is added as a single liquid, it should be solubilized in water in the form of a salt, or a suitable solvent (water, alcohol, butyl diglycol, ethylene glycol) should be used to disperse it. It is preferable to dissolve or emulsify the compound in an organic solvent such as propylene glycol monomethyl ether, etc., add a surfactant if necessary, and use it as a preparation at an appropriate concentration. Examples of surfactants in this case include polyoxyethylene alkyl ethers, polyoxyethylene alkyl esters, sorbitan alkyl esters, polyoxyethylene sorbitan alkyl esters, polyoxyethylene polypropylene copolymers, alkyl betaines, etc. It will be done.

[0019]

[Examples] The present invention will be explained below with reference to Examples.
This invention is not limited thereby. Example (foaming test) JIS K 3362 Ross-Miles (Ross
A foaming test was conducted according to the -Miles method to examine the foaming degree of each blending ratio. That is, the test solution was dropped from the top, and the foam height (mm) immediately after the drop was measured as the foaming power, and the foam height (mm) after 5 minutes was measured as the stability. The results are in Table 1
~As shown in Table 6. The results shown in Tables 1 to 6 show that foamability is suppressed by blending the higher fatty acid amine compound with the quaternary ammonium compound. In addition, freshwater and seawater are used as target water, and 4
Tests were conducted at a water temperature of 0°C. Furthermore, even when a higher aliphatic amine compound was added to the quaternary ammonium compound, there was no change in the ability to inhibit microorganisms.

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

[Table 3]

[0023]

[Table 4]

[0024]

[Table 5]

[0025]

[Table 6]

[0026]

According to the foaming suppression method of the present invention, foaming when a quaternary ammonium compound is applied to an aqueous system can be significantly suppressed. Further, the higher aliphatic amine compound exhibiting an antifoaming effect itself has a low COD and is easy to handle, and does not inhibit the effect of the quaternary ammonium compound.

Therefore, according to the present invention, problems caused by foaming properties when using quaternary ammonium compounds can be efficiently and easily solved, and the range of use of quaternary ammonium compounds can be expanded.

Claims (3)

[Claims] [Claim 1] When using a quaternary ammonium compound having foaming properties in water, the following general formula (I):
[In the formula, R4 is a saturated or unsaturated linear aliphatic hydrocarbon group having 12 to 18 carbon atoms, and R5 and R6 each have 1 carbon atom, which may be substituted with a hydrogen atom or an amino group.
~4 lower alkyl group, and Y represents an acid residue. A fourth method consisting of the combined use of a higher aliphatic amine represented by
A method for suppressing foaming of class ammonium compounds. [Claim 2] The amount of higher aliphatic amine of general formula (I) is 0.05 to 1 per mole of the quaternary ammonium compound.
The method for suppressing foaming according to claim 1, wherein 0 mol is used in combination. 3. The method for suppressing foaming according to claim 1, wherein the higher aliphatic amine compound of general formula (I) is a higher aliphatic tertiary amine.