JPS6185500A - Raw solution for aerosol - 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 (Field of Industrial Application) The present invention relates to an aerosol stock solution in which sodium hydroxide, potassium hydroxide, etc. are dissolved, and its main uses include automobiles, furniture, kitchens, bathrooms, office supplies, etc. It is a cleaner that can be used in many fields.

(Prior Art) Aerosols are produced by filling a pressure can with a stock solution containing various chemicals and a propellant for ejecting the stock solution.

Conventionally, aerosol-type cleaner stock solutions containing surfactants and alkalis such as alkali carbonate, alkali silicate, alkali phosphate, ammonia, and ethanolamine are well known. When using ammonia or ethanolamine alone, the alkalinity is low and the effect as a cleaner is small. If alkali hydroxide is used, it has strong degreasing power and is expected to be even more effective as a cleaner.
However, there are only a few examples.

(Problems to be Solved by the Present Invention) Aerosols are products that are used in general households for a long period of time. Therefore, when alkali hydroxide is added, the alkalinity becomes too high (pH 14), which may be dangerous, but when it is made into an aerosol product, a decisive defect in blowing is recognized.

In other words, aerosol cans are made of aluminum or tinplate, but the former forms sodium aluminate, which corrodes the can and makes it unusable, while the latter is made of painted tinplate.
n forms sodium stannate and dissolves in the stock solution.

This is called a detining phenomenon, and even though the risk of puncturing the can is small at this level, the problem is that the above pH is neutralized with other acidic substances (phosphoric acid, carbonic acid, etc.) and the pH is lower than 14. When the concentration of Sn is lowered to .6, it combines with other surfactants and the like to form a complex precipitate. This precipitate solidifies in the middle of the day, so the aerosol valve, button,
The orifice pores of parts such as dip tubes become clogged, resulting in the inability to eject.

(Means for Solving the Problem) In order to deal with this problem, the present inventor researched a drug formulation for a stock solution that does not cause gold-tin precipitation in an alkaline stock solution, and added 0.0% tartaric acid to an alkaline solution in which alkali hydroxide was dissolved.
This problem was solved by adding 1 to 5%.

(Function) Sn dissolved by detining causes precipitation when another alkali (alkali carbonate, alkali phosphate, alkali silicate) is used. Therefore, in the present invention, formulations containing sodium hydroxide can be used. After first investigating various agents that do not precipitate Sn, it was conclusively found that by incorporating tartaric acid, tartaric acid has a significant precipitation-inhibiting effect. Therefore, in the presence of tartaric acid sufficient to mask dissolved Sn, the effect of preventing precipitation can be recognized even with the addition of a small amount of the above-mentioned alkali. Of course, there is no problem with the additional addition of alkalis such as ammonia, ethanolamine, and morpholine, and surfactants, builders, buffers, viscosity modifiers, and bleaching agents that are naturally co-incorporated as cleaners.

Precipitation is unlikely to occur even when one or more of brighteners, rust preventives, other organic solvents, abrasives, fragrances, pigments, etc. are added.

It is known that tin usually forms an alkali stannate and dissolves in alkaline conditions, and that stannyl compounds precipitate when the pH decreases.

Since there are other additives in the cleaner stock solution that is the object of the present invention, precipitation occurs due to complex bonds even at the pH before the precipitation of SnO(OH), and tartrate ions do not cause this precipitation. A masking effect appears.

In the present invention, when tartaric acid is added, alkali tartrate is formed in the liquid, so addition of alkali tartrate (sodium tartrate, potassium tartrate) is also within the scope. In aerosol, the volume ratio of the stock solution to 10% of the can volume is 80-40%.
It is common to be filled with ~50% propellant.
If the Sn in the tin plate is completely dissolved, 0.02 to 0.
The concentration is estimated to be about 2%, and the amount of tartaric acid needed to mask this is about 0.1 to 5% in the stock solution.

Aerosols have pores in various parts such as valves, buttons, and dip tubes, and the spray pattern suitable for use can be changed depending on the shape and size of these pores. That is, when a small injection amount is desired, the pores become clogged with precipitates, resulting in poor or impossible injection. Conventional alkali hydroxide compounding formulations were limited to relatively thick products for injection, but by using the stock solution of the present invention, it is possible to combine any parts.

In this way, the addition of tartaric acid to the alkaline hydroxide solution of the present invention
■As a cleaner, it softens severe alkalinity to a certain extent. ■It prevents the precipitation of Sn eluted from the can and prevents clogging of the orifices of the parts when used as an aerosol.

(Example) Example 1 Stock solution prescription loading soda...-4,0(-χ)tartaric acid...0. Fisopropylobanol -------6.0 Polyoxyethylene, nonylphenol ether ----5.0 Sodium flukylbensesulfonate ---1,
0 Sodium nitrite -・-・ 0.1 Fragrance
・---0.2 volume water production
=-.-83.0 or more was prepared and dissolved to obtain a product of the present invention.

Pressure-fill 300 mj2 of wood solution into a tin aerosol AE420 can with 20 mJ of LPG + 55 m1 of Freon.
When using a valve orifice 0.3 fin used as a cleaner for tiles, stainless steel, plastic, etc., if tartaric acid is not added (pH 14,0), the product after 6 months will become clogged. First, the stock solution of the invention product (
No phenomenon was observed when using pH 13.0).

Example 2 Sodium hydroxide 3.5 (匈χ), Tetratalic acid -1,0 ethyl alcohol 12. ON ・7 seal L ・
Curcumic acid-Na-1,0 Sorhitan monostearate-1 to 2.5 A stock solution according to the present invention was obtained.

200mff of this stock solution in an aerosol tin can of LPG18
01! was filled to obtain tableware 1 food cleaning aerosol.

If you use an all-position valve for convenient use,
Since the dip tube is thin (inner diameter 0.7 + n), it is generally prone to clogging if there is precipitate, but the product of the present invention
Even after several months had passed, no clogging occurred when using the undiluted solution. In addition, sodium carbonate 4.65W% instead of sodium hydroxide
A yellowish-white, three-shaped precipitate was observed in the formulation using .

Example 3 Sodium hydroxide 6.5 hours 1 part Sodium carbonate -2.5 7 Nisilic acid
1.5 citric acid 0.5 edetate 2Na ---0,5 polyoxene ethylene, nonyphenol ether -3,5 oleic acid trisoap ---1.0 higher alcohol sulfate Na ---2,0 Triethanolamine ---
---2.5 Isopropyl alcohol -5,0 Propargyl alcohol --0,5 Aromatic mixed solvent -1 ---14.0 Coloring agent
-111---- A stock solution according to the present invention was obtained by adding more than a trace amount of water to make 100 parts by weight of Venus. The aerosol prepared using this stock solution can be used as a cleaner for automobile engine compartments, effectively removing mineral oil, dirt, etc.

(Effects of the Invention) The present invention allows use of alkali hydroxide with strong cleaning power, and in addition, pH adjustment can be performed over a wide range, and in such cases, the formation of precipitates caused by Sn from tin cans can be suppressed. Since it can be used as an aerosol, various valve buttons can be used without any selection.

Claims (1)

[Claims] In an alkaline aerosol stock solution in which alkali hydroxide is dissolved as one of the constituents of the composition,
Tartaric acid or tartrate is C_4H_6O_6 and 0.
An aerosol stock solution characterized by adding 1 to 5 W%.