JPS624798A - Liquid detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acidic liquid cleaning composition that has the effect of easily removing shells such as oyster shells adhering to the bottom of a ship.

Shells such as oysters and Fujibuki stick to the bottom of the ship, and when these stick to the bottom of the ship, the ship becomes heavy, and the resistance to water increases while the ship is running, causing major problems such as slow running speed and poor fuel efficiency. As a result, the bottom of the ship has to be cleaned regularly.

Usually, these shellfish are physically scraped off,
Since it adheres strongly to the bottom substrate of ships, it is said to be extremely hard work to remove. For this reason, measures have been taken to prevent shellfish from adhering to the bottom of the ship, such as applying special paint to the bottom, but in reality, scraping is done periodically.

The purpose of the present invention is to reduce the conventional labor force, and therefore reduce the adhesion of shellfish to the ship's bottom substrate and remove them without the need for scraping or using less force than in the past. This is something that can be easily scraped off without adding anything.

In order to strip and remove shellfish, either the shells that cover the shells that are attached to the bottom substrate are dissolved, or the chemical compositions seep through these shells and come into contact with the shells, causing a small amount of damage. This is possible by coagulating proteins.

Since shells are composed of calcium carbonate, they are easily dissolved by acidic compositions, and the proteins in the shells are easily coagulated by acidic compositions.

That is, the present invention is a liquid cleaning composition that uses an acid for the purpose of dissolving seashells and coagulating the proteins in the shellfish's body.
It can be expected that the shells will be easily peeled off from the bottom substrate by sprinkling it on the surface, or removed by lightly scraping it off.

The ingredients of the composition of the present invention are as follows: The acid is hydrochloric acid or sulfamic acid, or a combination of these acids and droxycarboxylic acid, which forms a water-soluble calcium salt, and is stable as an aqueous solution and does not require post-treatment after washing. Hydrochloric acid, citric acid, and malic acid are suitable because they are easy to use and the salts produced by post-treatment (neutralization) do not easily cause environmental changes. These acids dissolve the surface of shells in a short time, and in order to facilitate post-treatment, it is also possible to use hydrochloric acid and hydroxycarboxylic acid in combination to adjust the amount of acid used.

Furthermore, a surfactant is used to make it easier for these acidic solutions to seep through the slight gaps in the shells created by dissolution.

The surfactant is polyoxyethylene alkyl ether, which is stable under acidic conditions, has low foaming property, and has excellent penetration power. Nonionic surfactants such as lyoxyethylene alkyl allyl ether are preferred, and polyoxyethylene alkyl ether, which has excellent microbial decomposition properties, is particularly preferred in consideration of environmental problems caused by drainage. These surfactants have permeability and are desirably used in an amount sufficient to allow the acid compound to seep through the gaps in the shell.

Furthermore, it is possible to apply an appropriate viscosity to prevent the composition from rebounding during use, to allow the composition to adhere to the cleaning surface for a long time, and to suppress corrosion of the ship's hull. It is also possible to use corrosion inhibitors such as ethylene oxide added amines. Particularly in the case of a hydrochloric acid solution, when a low molar ethylene oxide adduct of beef tallow amine was used, a favorable condition having both thickening effect and anticorrosion effect was obtained.

A preferred formulation of the present invention is as follows.

Hydrochloric acid (35% pure) 10-28.5% citric or malic acid 3-12% nonionic surfactant 0.1-0.5% (preferably polyoxyethylene furkyl ether) thickener and corrosion inhibitor Required amount of water Remaining amount Examples are shown below.

Example-1 Hydrochloric acid (35% pure) 28% polyoxyethylene alkyl ether (Sanyo Chemical Noni Ball Soft 88-70)
O,'%.

Composition of 71.9% tap water, and 12% citric acid,
Polyoxyethylene alkyl ether (Sanyo Chemical Nonyl Soft 5S-70) 0.1%, tap water 87.9%
% was sprinkled onto the surface of a piece of wood that had been left in seawater for a long period of time and had stuck to it, such as Fujitbo or oyster shells, and a phenomenon was observed in which the surface of the shells eventually foamed and dissolved. These stuck shellfish could be removed.

Example-2 A composition of 14% hydrochloric acid (35% pure), 5% citric acid, 0.1% polyoxyethylene alkyl ether (Sanyo Chemical Nonipole Soft 5S-70), and 81.9% tap water. When sprinkled on the surface of the same piece of wood as in Example-1, the surface of the shells was seen to foam and dissolve, and after being left for a while, the stuck shellfish could be easily removed.

Example-3 Hydrochloric acid (35% purity) 28%, polyoxyethylene alkyl ether (Sanyo Chemical Noni Glusoft 5S-70)
0.1%.

When the composition of tap water 71.996 was used to clean the bottom of a boat at a fish port, it was evaluated that it became easier to remove oyster shells, etc.

Claims (1)

[Claims] Hydrochloric acid, sulfamic acid, forming water-soluble calcium salts
Alternatively, it contains at least one type of acid component such as these acids and hydroxycarboxylic acids, and a surfactant that is stable under the conditions of mixed use with these acids, and is easily removed from surfaces to which shells are adhered, such as the bottom of a ship. An acidic liquid cleaning composition characterized by removing seashells.