JP2005169373A - Strong alkaline ion water, degreasing and rust-preventing method, water-paint, and wet tissue - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a degreasing and rust-preventing method which is excellent in safety, cleaning power, rust-prevention, and environmental friendliness. <P>SOLUTION: In this method, metal parts are sprayed only with strong alkaline ion water which is pH 12 or higher and produced via strong electrolysis without employing a pH promoter, or, otherwise, the metal parts are dipped into the strong alkaline ion water. This method is environment-friendly with a high level of safety, while exhibiting superior cleaning power and rust-proofing ability, since the degreasing and rust-preventing are carried out only with the strong alkaline ion water of pH 12 or higher produced via the strong electrolysis, containing no chemicals nor solvents at all. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is an environment-friendly and highly safe strong alkaline ionized water having a pH of 12 or more, a degreasing / rust-preventing method using the strong alkaline ionized water, a water-based paint, and the strong alkaline ionized water. It is related to the wet tissue.

A. About degreasing and rust prevention Conventionally, degreasing (washing) and rust prevention are required for processing such as metal parts such as screws, tools, and industrial machines and metal products such as cutting, forging and rolling, and intermediate processes of surface treatment. Has been. Of these, organochlorine solvents such as trichlorethylene have been used for degreasing mainly metal cutting parts such as screw parts and forged / rolled parts.

  However, these organic chlorinated solvents such as trichlorethylene pollute the environment at the time of disposal (environmental), are not good for the human body (hygiene), are flammable and dangerous (safety), and are difficult to manage (management) ), Etc., the use of the pollution control agreement has been tending to be abolished.

  For this reason, alcohol-based cleaning agents such as kerosene are partly used as an alternative cleaning agent, but these are also environmental, sanitary, safety, management, etc. just by changing their eyes. The problem has not been solved. Moreover, these cannot demonstrate the detergency as much as trichlorethylene.

  By the way, degreasing (cleaning) means removing oil, and in metal parts and metal products, it is nothing but promoting rust. Therefore, it is a completely different process from rust prevention. Therefore, it was a general idea that even if degreasing was possible, oxidation could not be prevented (no rust preventive action).

However, in recent years, a technique has been proposed in which, for example, by containing hexavalent chromium at a specific concentration in strong alkaline ionized water having a pH of 10 or more, in addition to washing and removing oil, an antirust effect can also be obtained.
JP 2001-89879 A

  Using this strong alkaline ionized water, a large amount of negative ions positively ionizes the surface of dirt and substances, and a capillary phenomenon that spreads water to the gaps of dirt and the surface of substances by catalysis by a small amount of enzyme. The oil can be washed and removed by the accelerating effect and the exfoliation phenomenon accelerating effect of separating dirt from the substance by the repulsive action of negative ions.

  However, conventionally, for example, sodium chloride (NaCl) has been added to obtain a pH of 10 or more, which deteriorates the corrosion resistance and promotes the oxidation of iron, zinc, aluminum, etc., which have a higher ionization tendency than hydrogen. It was supposed to generate rust. Therefore, it is necessary to add some chemicals such as an antioxidant. In the above technique, a rust preventive effect is obtained by containing a specific concentration of hexavalent chromium.

  That is, in any of the conventional methods, some chemicals are added to obtain detergency and rust preventive power.

B. About water-based paints Generally, paints are roughly divided into film-forming elements and solvents. However, paints that do not contain solvents such as powder paints and solvent-free paints, There are also water paints.

  The solvent is composed of a true solvent that is the main component of dissolution, a co-solvent that is used in combination, and a diluent that governs coating workability, and is a component that dissolves or disperses the coating film forming element and has fluidity. Combined with a thin solution, the performance greatly affects the coating workability and the film-forming property. Therefore, it is important that the solvent has a balanced composition by combining various solvents, and its dissolving power and volatilization rate are important.

  In construction-related paints, emulsion paints have an overwhelming share, and there is a tendency to improve durability by combining epoxy resin-based undercoat paints with urethane resin-based topcoat paints with good weather resistance, and aim for maintenance-free.

  As for painting, undercoating, intermediate coating, and top coating are standard three times. Looking back over the past years of paint and painting, a problem of limited resources that has been awakened by an oil strategy in an unprecedented turbulent period, It is a countermeasure against strain and pollution in the high growth period, and the goal of science and technology is to be "faster, cheaper, more in volume, more convenient" than "more safe, resource-saving, pay attention to environmental conservation" It has been.

  By the way, water-based paints such as the emulsion paint include those using a film-forming element (vehicle / color developing agent) dissolved in water and those using a vehicle dispersed in water. From this point of view, the water-based paint currently used in Japan can be understood to the extent that it is a paint that can be diluted with water.

The components of this water-based paint are roughly classified into pigments such as white, black, and red, which are the base of the paint, water such as tap water for dilution, and a solvent that is an emulsifier (emulsion) that mixes the pigment and water. It is composed of three components.
JP 2002-69365 A

  As this solvent (emulsifier), nonionic surfactants, such as ether-based polyoxyethylene alkyl ethers, are used, but they are not good for the human body, so this solvent (emulsifier) is reduced or harmless. The use of these substances is being sought.

C. Wet tissue The wet tissue currently on the market is soaked with a lot of alcohol component, and may irritate the skin. Some contain surfactants that are not good for the human body.
JP 2000-287865 A

  The problems to be solved by the present invention are that a strong alkaline ionized water having a pH of 12 or more cannot be produced without using a pH accelerator, and the conventional technology that relied on chemicals for degreasing and rust prevention. However, there are problems in terms of environment, hygiene, safety, and management, and it is impossible to comply with pollution prevention agreements. It is impossible to mix pigment and water without using emulsifiers. It is a point that it is not possible to prevent irritation to the skin with wet tissue.

  As a result of various experiments conducted by paying attention to the above strong alkaline ionized water, the present inventors have conventionally used a salt (Nacl) or a pH accelerator such as a surfactant or sodium hydroxide (NaOH). In the case where strong alkaline ionized water having a pH of 12 or more, which could not be produced, is produced only by strong electrolysis without using the above pH accelerator, the organic chlorine solvent as well as the alkali is used. It is not necessary to mix any chemicals or solvents such as semi-aqueous solvents, alcohol-based, hydrocarbon-based, silicon-based solvents, etc., which are surfactants added in combination with water-based, neutral and acid-based solvents and flammable solvents. It has been found that it exhibits an anti-rust effect as well as an excellent degreasing effect.

Strong alkaline ionized water having a pH of 12 or more according to the present invention is based on the above findings,
In order to be able to comply with pollution prevention agreements without problems in terms of environment, hygiene, safety and management,
The main feature is that it was produced by strong electrolysis without using a pH accelerator.

Further, the degreasing and rust preventing method of the present invention is
The metal part is sprayed only with the strong alkali ion water of the present invention having a pH of 12 or more produced by strong electrolysis without using a pH accelerator, or the metal part is immersed in the strong alkali ion water. Is the main feature. Such a method of the present invention can be expected to improve its operational effect by increasing the temperature of strong alkaline ionized water due to the thermal effect.

  In the degreasing and rust prevention method of the present invention, the strong alkaline ionized water of the present invention produced by strong electrolysis without using a pH promoter is produced using a pH promoter as in the conventional method. This is because when strong alkaline ionized water is used, oxidation is promoted and it is necessary to use other chemicals or solvents for rust prevention.

  Further, in the degreasing and rust prevention method of the present invention, the strong alkaline ionized water having a pH of 12 or more is used according to the experiments of the present inventors using the strong alkaline ionized water having a pH of 12 or more. Thus, it has been found that degreasing and rust prevention can be achieved without using other chemicals or solvents. The pH of the strong alkaline ionized water is not limited as long as it is 12 or more, but it is desirable to use a strong alkaline ionized water having a pH of 12 to 13 from the relationship between productivity and production cost.

  In the degreasing and rust prevention method of the present invention, only the strong alkaline ionized water of the present invention having a pH of 12 or more is not limited to the organic chlorinated solvents used in the conventional degreasing and rust prevention methods. This means that it does not contain any chemicals such as quasi-aqueous solvents, alcohol-based solvents, hydrocarbon-based solvents, silicon-solvent-based solvents in which a surfactant is added in combination with a neutral or acid-based aqueous solvent or a flammable solvent.

  In addition, in the present invention, the metal part includes a metal part coated with a metal, such as wood, glass, rubber, resin, etc., in addition to a metal part generally called.

  Moreover, the strong alkaline ionized water of the present invention produced by strong electrolysis without using a pH accelerator has an emulsifying effect because its molecular structure is finer than that of water. And in the case of this strong alkali ion water of this invention, it is also environmentally friendly. Therefore, the use amount of the emulsifier can be greatly reduced by using strong alkaline ionized water as the dilution water of the water-based paint. In addition, the type of emulsifier used can be changed to a less toxic component.

The water-based paint of the present invention is made based on such a viewpoint,
The main feature is that it is produced by strong electrolysis without using a pH accelerator and diluted with the strong alkaline ionized water of the present invention having a pH of 12 or more.

  Moreover, strong alkaline ionized water has the effect of removing body fats and odors like soap. And when the strong alkali ion water of this invention produced by strong electrolysis without using a pH promoter is used, it does not irritate skin like alcohol.

The wet tissue of the present invention is made based on such a viewpoint,
The most important feature is that the non-woven fabric is impregnated with strong alkaline ionized water of the present invention having a pH of 12 or more produced by strong electrolysis without using a pH accelerator.

  Since the present invention is strong alkaline ionized water containing no chemicals or solvents and produced by strong electrolysis and having a pH of 12 or more, when performing degreasing and rust prevention, it has excellent cleaning power and rust prevention effect. It is environmentally friendly and highly safe while exhibiting stability. Moreover, when using as a dilution water of a water-based paint, the usage-amount of an emulsifier can be reduced significantly and the kind of emulsifier to be used can be changed into the thing of a less toxic component. Moreover, when using it for wet tissue, the fats and oils and odor of a body can be removed, without irritation | stimulating skin.

  In the degreasing and rust prevention method according to the present invention, the purpose of ensuring environmental friendliness and high safety was produced only by strong electrolysis without using any chemicals or solvents. Realized by using only alkaline ionized water.

  In addition, the water-based paint according to the present invention is environmentally friendly and has the purpose of greatly reducing the amount of emulsifier used, and is produced by strong electrolysis without using a pH accelerator. This was realized by diluting with strong alkaline ionized water.

  In addition, the wet tissue according to the present invention has a purpose of removing body fats and odors similar to soap without irritating the skin like alcohol, and without using a pH accelerator in the nonwoven fabric. This was realized by impregnating the strong alkaline ionized water of the present invention having a pH of 12 or more produced by electrolysis.

  The strong alkaline ionized water of the present invention used in the present invention removes trace amounts of residual chlorine, red rust, trihalomethane, soluble lead, agricultural chemicals, etc. contained in tap water using granular antibacterial activated carbon, calcium sulfite, etc. After that, it is supplied to the electrolytic cell, and the alkaline ionized water discharged from the cathode side outlet of this electrolytic cell is sent to the negative electrode side of the electrolytic cell and produced in a continuous special reflux electrolyzer that is repeatedly circulated.

Hereinafter, the results of experiments conducted to confirm the effects of the degreasing / rust prevention method according to the present invention will be described.
Using an austenitic SUS304 stainless steel bolt as a test article, immerse it in the following liquid or degreasing detergent (water temperature is 21-24 ° C.) at room temperature of 22-25 ° C. for 60 minutes and let it air dry for 10 days. The degreasing effect, the antirust effect, etc. were investigated. The results are shown in Table 1 below.

  In Table 1 above, in the method of the present invention using strong alkaline ionized water produced by strong electrolysis having a pH of 12 to 13 (shown as strong electrolyzed water in Table 1 and Tables 2 and 3), the intermolecular attractive phenomenon. It was possible to degrease almost certainly by the capillary phenomenon promoting effect and the peeling phenomenon promoting effect.

  As for rust prevention, although it was originally a stainless steel that is not easily rusted, it was able to effectively suppress oxidation, and shine was observed without rust generation. Also, the odor-causing dirt (oil) and other components can be removed by the antiseptic effect to prevent oxidation and the effect of promoting the peeling phenomenon, and the odor is hardly noticed and the deodorizing effect is excellent. Furthermore, since it is a strong alkali, it is difficult for bacteria to adhere and has excellent sterilization effect, and there was no problem in terms of environment. In addition, it was easy to handle and excellent in hygiene, and there were no safety / danger issues. Further, the test product subjected to the method of the present invention had a beautiful and bright surface, and the above-described effect was further increased by heating at 50 to 60 ° C.

  On the other hand, when tap water is used as a comparative example, it is natural that it is excellent in safety, but there are problems other than safety and it is confirmed that it cannot be used for degreasing and rust prevention. It was. That is, it was not possible to degrease the oil only by floating, and rust prevention was not different from that before washing, and after treatment, the smell of oil remained and there was no deodorizing effect. In addition, chlorine is easily lost and bacteria are attached, and it is mixed with oil and contaminated. Furthermore, it was confirmed that it was unsanitary because it became oily water and could not be used for industrial purposes.

  In addition, when mineral water was used, the degreasing effect, rust prevention effect, hygiene, safety / danger, etc. were the same as in the case of using the above-mentioned tap water, and a considerable odor remained on the deodorizing surface. In terms of sterilization, since the pH drops to neutral water after treatment, there is a high possibility of germination. In addition, the environment was dirty and could not be drained, so it was not much different from using tap water.

  In addition, when alkaline ionized water of pH 9 is used, the degreasing effect and sterilizing effect are slightly better than when using tap water or the mineral water, but a considerable amount of oil remains on the surface, and the sterilizing effect is In a slight point, the pH used in the method of the present invention was significantly inferior to strong alkaline ionized water having a pH of 12-13. In addition, there was no big difference with the said mineral water except a degreasing surface and a disinfection surface.

  In addition, when strong alkaline ionized water having a pH of 10 to 11 was used, there was no significant difference from the case of using alkaline ionized water having a pH of 9, but the degreasing effect and deodorant were better than when the alkaline ionized water was used. It was slightly better in terms of effect and hygiene. That is, it was possible to remove a little on the degreasing side, and a little odor remained on the deodorizing side. In terms of hygiene, it was neither good nor bad.

  In addition, when using conventional trichlorethylene, it is superior in terms of degreasing and sterilization, but the odor of the cleaning agent is strong, the treated solvent cannot be discharged from the viewpoint of preventing environmental pollution, and it is not used from the health aspect. As described above, it should be reconsidered.

  Except for the bolts made of carbon steel for machine structural use (JIS G 4051, S45C) as test products, the same conditions (using the same liquid and degreasing detergent (water temperature is 21-24 ° C.) as in Table 1 above ( After immersion for 60 minutes at room temperature of 22 to 25 ° C., natural drying for 10 days was conducted to investigate the degreasing effect, the antirust effect, and the like. The results are shown in Table 2 below.

  In Table 2 above, in the method of the present invention using strong alkaline ionized water having a pH of 12 to 13, even in the case of a carbon steel material for mechanical structure which is easily rusted, it could be degreased almost certainly and no rust was generated. The deodorizing effect, sanitizing effect, environment, hygiene, safety / danger, and other aspects were the same as those of SUS304 stainless steel.

  On the other hand, when using tap water, mineral water, alkaline ionized water having a pH of 9 or strong alkaline ionized water having a pH of 10 to 11 or using conventional trichlorethylene, it is completely rusted and corrosion resistant. Was the same as in the case of SUS304 stainless steel.

  Moreover, the present inventors investigated the fluctuation | variation with time passage of pH, such as the above-mentioned strong alkali ion water used for this invention method, and the tap water used for the above-mentioned experiment. The pH was measured by putting about 2/3 of the above liquid into a commercially available clear cup, vaporizing it in contact with oxygen, and examining the average pH of the day. The results are shown in Table 3 below.

  From Table 3 above, strong alkaline ionized water having a pH of 12 or more produced by strong electrolysis without using a pH accelerator is a conventional pH accelerator even under the above-mentioned conditions worse than normal storage conditions. Unlike the strong alkaline ionized water used, it was confirmed that the high pH was stably maintained even after several days.

  In addition, the room temperature and water temperature at the time of each measurement on the first to fourth days and the seventh day shown in Table 3 are 25 ° C. on the first day, the second day, and the third day. The water temperature was 23 ° C., on the fourth day, the room temperature was 24 ° C., the water temperature was 23 ° C., and on the seventh day, both the room temperature and the water temperature were 21 ° C.

  The above examples are for the degreasing and rust prevention method according to the present invention, but for the water-based paint and wet tissue according to the present invention, without using the molecular structure of strong alkaline ionized water or a pH accelerator. Needless to say, the objective effect is naturally obtained because it is based on the use of the strong alkaline ionized water according to the present invention.

As described above, the degreasing and rust prevention method of the present invention can be applied not only to degreasing and rust prevention but also to a deodorization and sterilization method.

Claims (4)

  Strong alkaline ionized water having a pH of 12 or more, which is produced by strong electrolysis without using a pH accelerator.   A metal part produced by strong electrolysis without using a pH accelerator is sprayed only with the strong alkali ion water according to claim 1 having a pH of 12 or more, or the metal part is placed in the strong alkali ion water. A degreasing / rust prevention method characterized by dipping.   An aqueous paint produced by strong electrolysis without using a pH accelerator and diluted with strongly alkaline ionized water according to claim 1 having a pH of 12 or more. A wet tissue produced by strong electrolysis without using a pH accelerator and impregnated with strong alkaline ionized water according to claim 1 having a pH of 12 or more.