JPH02229502A - Dewatering detergent - Google Patents

Abstract

PURPOSE:To efficiently remove water sticking to the surface of a body to be deterged by incorporating a specified amt. of a surfactant made of the salt of a specified aliphatic amine with specified aliphatic carboxylic acid into a chlorohydrocarbon solvent. CONSTITUTION:A surfactant made of the salt of an aliphatic amine represented by general formula R<1>-NH2 (where R<1> is 6-12C alkyl) with aliphatic carboxylic acid represented by general formula R<2>-COOH (where R<2> is 5-6C alkyl) is incorporated into a chlorohydrocarbon solvent by 0.1-10wt.%. The resulting dewatering detergent does not affect an ozone layer and can efficiently remove water sticking to the surface of a body to be deterged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drain cleaning agent that can efficiently remove water adhering to the surface of an object to be cleaned.

(Prior Art) Conventionally, in order to efficiently remove water adhering to the surface of solid materials such as metals, glass, ceramics, and plastics, ■IPA. A method in which the washed article is immersed in a hydrophilic solvent such as ethanol, methanol, or acetone, the water adhering to the article is diffused into the solvent, and then drained and dried;
■A method of immersing water-adhered items in a cleaning agent containing 1,1,2-trichloro-1,2,2-trifluoroethane and a surfactant, removing the adhering water, and draining and drying. etc. are being put into practice.

(Problem to be solved by the invention) However, the previous point is that the solvent itself is flammable, and the water adhering to the object to be cleaned diffuses into the solvent, so depending on the amount, it cannot be used as a cleaning agent. The problem is that the cleaning solvent has a relatively short lifespan and must be replaced frequently, and although the latter has excellent drainage performance, its production and consumption have recently been regulated as an ozone depleting substance. Therefore, the emergence of a drain cleaning agent using a chlorinated hydrocarbon solvent that has the same performance as a drain cleaning agent made by adding a surfactant to 1,1,2-trichloro-1,2,2-trifluoroethane. was strongly desired. (Means for solving the problems) The present invention is as follows. This was achieved as a result of intensive studies to solve these problems, and it is possible to add general 2R1-NH2 (in the formula, R1 is an alkyl group having 6 to 12 carbon atoms) to a chlorinated hydrocarbon solvent. The aliphatic amine represented by the general formula R”
-COOH (in the formula, R2 is an alkyl group having 5 to 6 carbon atoms) A drain cleaning agent containing 0.1 to 10% by weight of a surfactant consisting of a salt with an aliphatic carboxylic acid represented by According to this, 1.
, 1.2-trichloro-1.2.2-Trifluoroethane, there is no risk of destroying the ozone layer, and it has excellent ability to remove water adhered to the surface of the object to be cleaned, even during long-term use.
It has the same draining performance as this, has an extremely short drying time, does not rust on the metal surface, is nonflammable, and has excellent draining and drying properties. To explain this in more detail, the drain cleaning agent according to the present invention contains a chlorinated hydrocarbon solvent.
General formula R 1- N Hz (In the formula, R1 has 6 carbon atoms
~l2 alkyl group) and an aliphatic carboxylic acid represented by the general formula r 0.1-10% by weight of a surfactant consisting of a salt;
It preferably contains 0.5 to 3% by weight.
Here, when the amount of surfactant added is less than 0.1% by weight, the water removal performance is not sufficient, and when it exceeds 10% by weight, a large amount of surfactant remains on the surface of the object to be cleaned, which is not preferable. The chlorinated hydrocarbon solvent used in the drain cleaner of the present invention preferably has a specific gravity of 1.3 or more, is liquid and nonflammable at room temperature, and among these, methylene chloride is particularly preferred. The aliphatic amine represented by the general formula above is n-octylamine, in which R1 is an alkyl group having 8 carbon atoms in the general formula R1-NH, and the aliphatic carboxylic acid is represented by the general formula i<"- Most preferred is n-caproic acid in which R2 of c○OH is an alkyl group having 5 carbon atoms.

In the drain cleaning agent of the present invention, surfactants and rust preventives other than the salts of aliphatic amines and aliphatic carboxylic acids mentioned above can also be used in combination. Further, when using this drain cleaning agent, any known drain cleaning device can be applied, and it can be suitably used in either a cold bath or a boiling bath.

(Examples) Hereinafter, specific embodiments of the present invention will be explained using Examples and Comparative Examples, but the present invention is not limited to the description of these Examples.

Example 1. Cleaned glass plate (25X75X t=1m
) with water attached to it, and then add 1 part of the surfactant shown in Table 1.
．． The specimens were immersed in a detergent consisting of methylene chloride containing 5% by weight, and the time required for the adhering water to be removed while standing still was measured, and the results are also listed in Table 1. Table-1 (Fist: Made by Asahi Glass) Example 2. Cleaned glass plate (25x75X t = 1
m) with water, immersed in a detergent consisting of methylene chloride containing 1.5% by weight of the surfactant shown in Table 2, washed and dried in the following manner, and then contacted. The angle was measured and the rinsing performance on the glass plate surface was compared. The results are also listed in Table-2.

(Cleaning and drying methods) Immersion/Ultrasonic Immersion/Ultrasonic Table-2 Steam bathAccording to the present invention, the ozone layer is There is no risk of breakage, and even after long-term use, the same water removal performance is provided, and the drying time is extremely short, there is no rust on the metal surface, and it is non-flammable.
Liquid management is also easy. Furthermore, compared to cleaning agents containing a salt obtained by neutralizing methylene chloride with n-octylamine and n-caprylic acid as a surfactant, the ability to remove water adhering to the surface of the object to be cleaned and the rinsing performance are improved. Demonstrates excellent functionality.

: Grade fist for methylene chloride steam cleaning made by Shin-Etsu Chemical Co., Ltd. *Fist made by FTL glass ■ Glass plate immersed in IPA and steam cleaned (effects of the invention)

Claims (1)

[Claims] 1. General formula R^1-NH_2 in chlorinated hydrocarbon solvent
(In the formula, R^1 is an alkyl group having 6 to 12 carbon atoms)
A surfactant consisting of a salt of an aliphatic amine represented by the following formula and an aliphatic carboxylic acid represented by the general formula R^2-COOH (wherein R^2 is an alkyl group having 5 to 6 carbon atoms). 1
A drain cleaning agent containing ~10% by weight.