JPS60112899A - Luster stein detergent for ceramics or like - 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] This invention is directed to
This relates to a cleaning agent that effectively removes contamination without attacking the ceramic substrate2.As is well known, for example, when architectural tile pieces are installed using concrete or mortar in various ways, After that, Lanuta-like contamination may occur on some tile surfaces.

This Rusk contamination occurs either in a very short period of time (from 1 week to 10 days) after the tile work is completed, or after many years due to the influence of the flow of rainwater or the influence of the sun's rays. There are cases where this occurs over a long period of time.

Rusk contamination on the ceramic surface that occurs in this way can be removed by cleaning methods that are commonly used for the purpose of cleaning ceramic surfaces.
It could not be removed by pickling with a solvent such as diluted hydrochloric acid, and even by washing with a high-density acid such as a sulfuric acid solvent or a nitric acid solvent, all <b,b could not be removed. On the other hand, rusk contamination that occurs on the ceramic surface can be removed by treatment with hydrofluoric acid.However,
When treated with hydrofluoric acid, the tile substrate is also eroded, resulting in roughness and roughness of the tile surface.
Otherwise, problems such as discoloration of the tile surface occurred.

The purpose of this invention is to address the various problems mentioned above, and to provide a rusk contamination cleaning agent that can quickly remove only the Lanuta contamination that has occurred on the ceramic surface without eroding, deforming, or discoloring the ceramic base. It is about providing.

In order to achieve the above-mentioned object, this invention specifically adds at least one selected from the group of fox acid, anhydrous sodium carbonate, aqueous ammonia, or (or magnesium hydroxide) to an aqueous solution of hydrofluoric acid. This is a lanuta stain cleaning agent for ceramics, etc., characterized by comprising a reaction mixture obtained by adding a compound.

Hereinafter, the detergent for cleaning rust stains on ceramics and the like according to the present invention will be described with reference to specific examples.

An example of a rusk stain cleaning agent is obtained by adding water to hydrofluoric acid and adding extracted acid to this aqueous solution. In this example, the cleaning agent contains some or most of the hydrofluoric acid.
It is composed of a reaction solution obtained by reacting with t-acid, and suppresses the effect of hydrofluoric acid reacting with the inflammatory acid content of the tile base, which is the target object. In this example, 4-sand fine powder may be applied instead of 4-acid added to the aqueous solution of hydrofluoric acid.

Next, specific reaction examples of the above examples will be shown.

Reaction example 1 Hydrofluoric acid (concentration 46.5%) 26Q, water 40%
65 parts by weight of colloidal acid are added to this aqueous solution while stirring, and the mixture is stirred and reacted for about 5 hours to obtain an almost transparent reaction solution.

Reaction example 2 Hydrofluoric acid (1)'A degree 46.5%) 260 parts by weight.

Add 40 parts by weight of water, and add 150 parts by weight of colloidal monoacid to this aqueous solution.
A portion of the mixture is added with stirring, and the mixture is stirred and reacted for about 5 hours to obtain a slightly cloudy viscous liquid.

Reaction Example 3 To 260 parts by weight of hydrofluoric acid (concentration 46.5%), 40 parts by weight of water
3 parts by weight of colloidal hydrochloric acid are added to this aqueous solution with stirring, and the reaction is stirred for about 3 hours to obtain a transparent reaction liquid.

Reaction example 4 260 parts by weight of hydrofluoric acid (concentration 46.5%) 5 parts by weight of water 40 parts
70 parts by weight of sand powder (JIS standard sieve 200 mesh complete) was added to this aqueous solution with stirring, and the reaction was stirred for 6 hours to obtain an almost transparent reaction liquid.

Reaction Example 5 Add 40 parts by weight of water to 260 parts by weight of hydrofluoric acid (concentration 46.5f'6), and add silica sand fine powder (same as above) to this aqueous solution.
When 150 parts by weight of the mixture was added with stirring and reacted with stirring for about 7 hours, a slightly cloudy viscous mixture was obtained.

Reaction example 6 Hydrofluoric acid (concentration 63.596) to 260 parts by weight.

Add 40 parts by weight of water and add 54 sand fine powder (same as above) to this aqueous solution.
A transparent reaction solution is obtained by adding 40M parts with stirring and reacting with stirring for about 4 hours.

The results of cleaning rusk contamination with the cleaning agents obtained in each of the above reaction examples 1 to 6 are shown below. When the reaction solutions obtained in Reaction Examples 1 and 4 were diluted 10 times with water and the surface of the Lanuta-contaminated tiles was washed in the same manner as normal pickling, the Lanuta contamination could be completely removed. No discoloration was observed at all. The reaction solutions obtained in Reaction Examples 2 and 5 seem to have somewhat weak cleaning ability due to the excess cinnabar acid content, but if the solution is diluted 3 to 5 times, it can be used in the same way as for ordinary pickling. On the other hand, with a 10-fold diluted solution, the contaminated tile surface can be completely removed by soaking it in the solution for about 5 to 10 minutes. The reaction liquids obtained in Reaction Examples 3 and 6 have a stronger cleaning ability than those in Reaction Examples I and 4 because a part of the hydrofluoric acid has reacted with procetic acid. Therefore, depending on the type of tile, even with a 10-fold diluted solution, there may be some discoloration when cleaning is performed in the same way as normal pickling. Therefore, extremely effective cleaning results can be obtained by wiping off immediately after applying the cleaning agent to shorten the time that the cleaning agent remains on the tile surface.

On the other hand, another example of a raster stain cleaning agent is to add water to hydrofluoric acid and to this aqueous solution, for example, anhydrous soda,
It is obtained by adding an inorganic alkali compound such as aqueous ammonia or magnesium hydroxide. The cleaning agent in this example consists of a reaction solution obtained by neutralizing a part or most of hydrofluoric acid with the above-mentioned inorganic alkali compound.A specific example of the reaction is as follows. It is common knowledge.

Reaction Example 7 86 parts by weight of hydrofluoric acid (concentration 46.5%), 200 parts by weight of water
0 parts by weight is added, and 106 parts by weight of anhydrous soda carbonate is added thereto with stirring to obtain a transparent reaction liquid.

Reaction Example 8 86 parts by weight of hydrofluoric acid (Ca content 46.5%), 200 parts by weight of water
0 parts by weight is added thereto, and 53 parts by weight of anhydrous soda carbonate is added thereto with stirring to obtain a transparent reaction solution.

Reaction solution 9 Add 7k 1 to 86 direct parts of hydrofluoric acid (concentration 46.5%)
800]i parts, and to this 1 part of 30% ammonia water.
When 20 direct parts are added with stirring, a clear reaction solution is obtained.

Reaction example IO 86 parts of hydrofluoric acid (a degree 46.5%), 18 parts of water
00 parts by weight are added thereto, and 60 parts by weight of 30% aqueous ammonia are added thereto with stirring to obtain a transparent reaction solution.

Reaction Example 11 Hydrofluoric acid (concentration 46.5%) 86 parts by weight ((, water 20
00 parts by weight are added thereto, and 60 parts by weight of magnesium hydroxide is added thereto with stirring to obtain a white suspended reaction solution.

Reaction example 12 86 parts by weight of hydrofluoric acid (concentration 46.5%), 200 parts by weight of water
0 parts by weight is added, and 30 parts by weight of magnesium hydroxide is added thereto with stirring to obtain a slightly white suspended reaction solution.

The results of cleaning raster stains with the cleaning agents obtained in Reaction Examples 7 to 12 above are shown below. Reaction example 8.9, ■0.12
When the surface of a tile contaminated with raster was washed with the reaction solution obtained by the method similar to ordinary pickling, the raster (ri stain) could be completely removed and no discoloration of the tile surface was observed. Reaction Example 7 With the solution obtained in step 11, a sufficient removal effect cannot be obtained with ordinary pickling;
It was necessary to leave the tau night on the tile surface for 10 minutes or wipe the solution several times with a damp cloth. This means that there are differences depending on the substance to be neutralized, and on the contrary, the cleaning ability can be adjusted by changing the degree of neutralization and the type of substance.

As described above, the raster contamination cleaning agent for ceramics, etc. according to the present invention can quickly remove raster contamination generated on the surface of ceramics without eroding and discoloring the ceramic base material to be cleaned, and can improve the cleaning work. It can be said that this is extremely effective in improving efficiency.

Patent applicant: Shino Touseki Co., Ltd. Deputy Manager Shinji Ken Department (1 other person)

Claims (1)

[Claims] Lanuta contamination on ceramics, etc., characterized by comprising a reaction solution obtained by adding at least one compound selected from the group of 51 acid, anhydrous sodium carbonate, aqueous ammonia, or magnesium hydroxide to an aqueous solution of hydrofluoric acid. Detergent.