JP2742284B2 - Polishing agent - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a polishing agent, particularly a polishing agent which exhibits excellent performance when used on a painted surface of an automobile or the like.

[Prior Art] Polishing agents for automobiles are used for the purpose of protecting the coating of automobile bodies and maintaining / improving the appearance, and various types of polishing agents have been commercially available.

However, all of the conventional commercial products have a drawback that they are apt to flow under the influence of temperature, wind, rain, dust and the like in a natural environment.

Therefore, it drops off from the surface of the coating in a short period of time and loses its water repellency, and the protective effect of the coating also decreases.

Also, the property of this conventional product, which is easy to flow, is that when it is applied to the roof of an automobile, the glazing agent is transferred to the window glass as an oil film in the process of falling off, and this oil film impedes safe driving. It is causing a big problem of becoming. In other words, the oil film emerges by the light of the oncoming vehicle when traveling under rainfall at night, which obstructs the field of view and causes danger, which is a major drawback of the conventional polishing agent.

In addition, when the temperature rises, the fluidization of the glazing agent on the painted surface is promoted and stickiness appears, causing contaminants to adhere, accelerating the stain on the painted surface and impairing the appearance.

Incidentally, JP-A-58-147472 and JP-A-58-225172, as described later, are a few conventional techniques containing fatty acid bisamide and the like, which is an important active ingredient of the present invention,
These publications relate to a glazing agent for a plastic exterior material such as a bumper of an automobile, and the object is largely different from that of the present invention, and the content of the above-mentioned active ingredient is small and largely depends on other components. Also, the configuration and effects are greatly different from those of the present invention.

[Problems to be Solved by the Invention] The following findings were obtained by analyzing and examining the disadvantages of the above-mentioned conventional polishing agent for automobiles.

(A) Polishing agents that are easy to soften (for example, those containing a relatively large amount of a compound having a low melting point) tend to cause contaminants to adhere thereto, and easily generate stains called water scale.

(B) Polishing agents that tend to soften do not retain water repellency for a long time.

(C) Polishing agents that tend to soften cause an oil film to adhere to the window glass.

(D) Polishing agents that easily soften (for example, those containing a large amount of high melting point compounds) are difficult to apply / wipe, resulting in uneven application and impairing the appearance.

The present invention has been made with the object of solving the problems of the conventional polishing agents based on the above knowledge, and has excellent adhesion of contaminants under a natural environment with almost no adhesion. It has antifouling properties, has long-lasting water repellency, and can prevent transfer as an oil film to the window glass surface, and has good applicability, no uneven coating, easy wiping and gloss. The purpose of the present invention is to provide a polishing agent having very good properties.

[Means for Solving the Problems] As a result of intensive studies to develop a polishing agent having such preferable characteristics, the present inventors have found that a specific fatty acid bisamide compound or a wax with a specific fatty acid bisamide compound is used as a film-forming component. Using the mixture as the basic composition of the film-forming component and blending it with a specific proportion of silicone oil, and dissolving, emulsifying, or dispersing this in an appropriate amount of liquid medium, it can be suitable for the above purpose. And found the present invention based on this finding.

That is, the present invention relates to the general formula (Wherein, R ₁ and R ₂ in the formula represent a linear or branched alkyl group having 8 to 30 carbon atoms, and m represents an integer of 1 to 6). 80 to 95% by weight of a mixture of two or more 80 to 95% by weight and 5 to 20% by weight of a silicone oil, or 80 to 95% by weight of a mixture of one or more of the fatty acid bisamide compounds with a wax and 5 to 20% by weight of a silicone oil A film-forming component comprising 30% by weight or more based on the total amount of the film-forming component, and dissolving, emulsifying or emulsifying the film-forming component in an amount of at least 30% by weight based on the total amount of the film-forming component. It is intended to provide a polishing agent characterized by being dispersed.

General formula (I) blended as an essential component in the film-forming component of the polishing agent of the present invention (hereinafter referred to as General formula I)
Specific examples of the compound represented by, N, N'-methylenebis lauryl amide, N, N'-ethylene bis lauryl amide, N, N'- methylene bis myristyl amide,
N, N'-ethylenebismyristylamide, N, N'-methylenebispalmitylamide, N, N'-ethylenebispalmitylamide, N, N'-methylenebisstearylamide,
N, N'-ethylenebisstearylamide, N, N'-hexamethylenebisstearylamide, N, N'-methylenebisbehenylamide, N, N'-ethylenebisbehenylamide, NN'-methylenebismontanilamide, N, N'-ethylenebismontanilamide, N, N'-hexamethylenebismontanilamide and the like can be mentioned, and these compounds may be used alone or in combination as appropriate.

In the above film-forming component, it is necessary to blend 80 to 95% by weight of one or more of the compounds represented by the above general formula I or a mixture thereof with a wax.

Further, in the case of this mixture, it is necessary that the compounding ratio of the compound of the general formula I is not less than 30% by weight based on the total amount of the film-forming components. The coating softens as the temperature rises, contaminants adhere to it, and it becomes an oil film on the window glass, which makes it easy to transfer, and the water repellency does not last for a long time. On the other hand, this compounding ratio is 95% by weight.
If the amount exceeds the above range, a large amount of labor is required for the wiping operation after the application of the polishing agent, and the application of the polishing agent is likely to be uneven and the appearance is impaired.

By the way, the compound represented by the general formula I is also compounded in the above-mentioned JP-A-58-147472 and JP-A-58-225172, but the content thereof is 25%.
It is less than 10% by weight, and is significantly inferior to the polishing agent of the present invention in terms of, for example, anti-contaminant adhesion, water repellency and oil film prevention. It should be noted that the techniques disclosed in these publications greatly differ from the present invention in terms of the purpose thereof, and are largely dependent on other components as described above.

The compound represented by the general formula I in the present invention has good water repellency and has water repellency retention and antifouling properties. Therefore, the length of the alkyl group and the number of methylene groups (m) in the compound are as follows. It is limited like this.

That is, the carbon number of R ₁ and R ₂ in the general formula I is limited to 8 to 30, and if this carbon number is less than 8, hydrophobicity is lost and water repellency is reduced, while carbon number is more than 30 , The melting point of this compound is lowered, and the water repellency persistence is poor. Further, the number of m in the general formula I is limited to 1 to 6, and m is 6
Above this, there are no inexpensive raw materials industrially produced, which is uneconomical. In the above-mentioned film-forming components, wax is appropriately blended according to the purpose. Examples of the wax include, in addition to carnauba wax and paraffin wax, beeswax, natural waxes, and synthetic waxes such as polyethylene wax, polyethylene oxide wax, microcrystalline wax, and microcrystalline oxide wax. Thereby, the characteristics as a polishing agent can be adjusted according to the purpose.

Next, the silicone oil, which is another essential compound in the film-forming component of the present invention, exerts the effect of imparting gloss to the polishing agent and facilitating the application and wiping operations.

Specific examples of the silicone oil include, for example, dimethyl silicone oil, and modified silicone oil substances such as carboxyl group-modified, hydroxyl group-modified, amino group-modified, and epoxy group-modified, and the like. Or two or more silicone oils may be appropriately used in combination.

The blending ratio of this silicone oil must be 5 to 20% by weight of the film forming component, and if it is less than 5% by weight, the wiping workability after the application of the polishing agent is deteriorated, and much labor is required. This causes uneven application of the dispensing agent and impairs aesthetic appearance. On the other hand, if this silicone oil exceeds 20% by weight of the film-forming component, the applied film becomes tacky, and contaminants adhere to the film, resulting in stubborn stains and impairing the aesthetic appearance, and also the film becomes soft. Under the influence of temperature and wind and rain, flowing and spilling from the painted surface of the car did not maintain water repellency, and the glaze applied to the roof of the car was transferred to the window glass as an oil film and was unsuitable for safe driving. It becomes.

The general proportion of silicone oil (in the film-forming component) contained in a conventional automobile polish is as low as 40 to 60% for a solid wax in quantity, and 60% for a liquid wax. From about 100%, and the amount of silicone oil in the polishing agent of the present invention is considerably smaller than those of the conventional products.

The polishing agent of the present invention comprises dissolving, emulsifying or dispersing such a film-forming component, that is, a film-forming component comprising a compound of the general formula I, a silicone oil and a wax appropriately mixed according to the purpose, in a liquid medium. It is a thing.

In the polishing agent of the present invention, when the film-forming component is dissolved in the liquid medium, the liquid medium, that is, the solvent, is the most desirable liquid because a petroleum-based solvent facilitates the coating operation and also plays a role of removing dirt. . Examples of the petroleum solvent include n-hexane, isooctane, toluene, xylene, mineral spirit, kerosene and the like, and these may be used in combination as appropriate.

Further, the film-forming component may be used by emulsifying it in water or a water / solvent mixture system. In this case, for example, a compound of the general formula I and silicone oil, and if necessary, a wax and the like are first mixed with kerosene or the like. Dissolved in petroleum solvent,
What is necessary is just to prepare an O / W type emulsion by stirring it with a homomixer while adding it into water in which an anionic, nonionic or cationic surfactant is dissolved. Alternatively, a W / O type emulsion may be prepared by dissolving a surfactant in advance in a solvent, dissolving a film-forming component, and emulsifying this with water.

In the present invention, the amount of the liquid for dissolving, emulsifying, or dispersing the film-forming component needs to be 5 to 100 times by weight of the film-forming component, and if it is less than 5 times by weight, a large amount of labor is required for the coating operation. On the other hand, if it exceeds 100 times by weight, the film-forming component cannot be sufficiently applied.

Even when a solvent is used, the film-forming components may settle down with time in the lower part of the solution.If necessary, an anionic, nonionic, cationic, or amphoteric surfactant may be used. It may be blended, or means for partially adding a solvent such as alcohol is also possible.

As described above, the dissolution state or the emulsification state may change to the dispersion state depending on the relationship between the solubility of the film-forming component and the temperature and time. Of course, the polishing agent of the present invention can be used in this dispersion state.

In addition, it is preferable to add a rust preventive or a fungicide when stored in a can for a long period of time, and an inorganic material whose hardness, particle size and shape are appropriately selected for the purpose of facilitating wiping work. Powders and organic particles may be blended.

The glazing agent of the present invention has a long duration of glazing effect, so that the period of exposure to sunlight is long. Therefore, ultraviolet absorbers such as hydroxybenzophenone and hydroxybenzotriazole, and phenol-based and amine-based oxidizing agents It is more preferable to add an inhibitor.

[Function] The present invention has the above-mentioned constitution, and dissolves, emulsifies, or disperses a film-forming component in which a compound represented by the general formula I and a silicone oil are blended in an appropriate ratio in a predetermined amount of liquid. It is a polisher that can be used.

Since the compound represented by the general formula I has an appropriate melting point, water repellency, antifouling property, and adhesion to a painted surface, and the compound is contained in a film forming component in a predetermined ratio, There is little softening of the film-forming components and there is almost no adhesion of contaminants, and there is no fluidization, so transfer as an oil film to a window glass can be prevented. It is.

Silicone oil, which is another essential component of the film-forming component, imparts luster to the polished film and improves water repellency. The silicone oil is blended in the film-forming component in a predetermined range. It has good coating properties and wiping workability, and it also suppresses softening and fluidization of the film, which prevents softening and fluidization, preventing contaminants from adhering and transferring as an oil film to window glass. is there.

And, since this film-forming component is dissolved, emulsified, or dispersed by an appropriate amount of a liquid such as a solvent, the appropriate amount of the film-forming component is applied and the workability of the application is improved. .

As a result of the above, the polishing agent of the present invention has a long-lasting polishing effect, good workability of polishing, good protection of automobile coating and water repellency, and excellent antifouling property and excellent gloss. It maintains the aesthetic appearance for a long time, and plays an important role in safe driving because there is no formation of an oil film.

[Examples] As shown in Table 1, polishes of various formulations (Examples 1 to 1)
16, Comparative Examples 1 to 4) were prepared and uniformly dissolved or emulsified.

However, the abbreviations and symbols in Table 1 indicate the following substances, respectively.

EBS… N, N′-ethylenebisstearylamide MBS… N, N′-ethylenebisstearylamide EBL… N, N′-ethylenebislauramide EBM… N, N′-ethylenebismontanilamide HMBS… N, N '-Hexamethylenebisstearylamide ms ... Dimethyl silicone 500 cst hs ... Hydroxy group-modified silicone oil Carnauba ... Carnauba wax Paraffin ... Paraffin wax 135 ° F Isooct ... Isooctane Examples 14 to 16 and Comparative Example 4 are of the emulsifying type, and the film-forming components are indicated by g, and their preparation methods are as follows.

In Example 14, the film-forming components shown in Table 1 were dissolved in 900 g of kerosene while heating, and the mixture was stirred with a homomixer while being added to 567 g of an aqueous solution of 4% polyoxyethylene nonylphenyl ether (HLB value 14). Emulsion.

In Example 15, 100 g of kaolin (average particle size: 5 μm) was added to 1000 g of the polishing agent of Example 14, and the mixture was stirred with a homomixer to obtain a polishing agent which also serves as a stain remover. In Example 16, 20 g of sorbitan monooleate was added to the film-forming components shown in Table 1 and these were dissolved in 900 g of kerosene while heating, and the mixture was added to 747 g of water using a homomixer. Stir
A W / O emulsion was obtained.

Comparative Example 4 was emulsified in the same manner as in Example 14 except that only carnauba wax was used as a film-forming component as shown in Table 1.

The polishes of Examples 1 to 16 and Comparative Examples 1 to 4 in Table 1 were tested and evaluated for their water repellency, antifouling property, workability, and oil film transfer property, respectively. It is on the street.

(A) Sustained water repellency White alkyd resin baked painted plate (7
(0 mm × 150 mm) was polished with No. 2000 water-resistant abrasive paper, washed with water and dried, and used as a test panel.

Apply a polishing agent to each test panel, wipe it off in a semi-dry state, expose it on a 45-degree exposure table on the south side (in Kobe), and determine the water contact angle with the painted surface over time to determine the water repellency. evaluated.

The larger the contact angle, the better the water repellency.

(B) Antifouling property A test panel similar to (a) was coated with a polishing agent in the same manner as (a) and exposed, while the coated surface was washed with water over time to remove the moisture, and the glossiness was measured. Was determined with a gloss meter (gross meter), and the antifouling property was evaluated.

It should be noted that the greater the gloss, the better the gloss without stains.

(C) Workability (a) Applyability (ease of elongation) Black alkyd resin baked coated plate (2
(00 mm × 200 mm) was cleaned with ligroin, and then dried and used as a test panel.

Each polishing agent was impregnated into a flannel cloth and spread lightly and uniformly over the entire surface of the test panel. The amount of the polishing agent required to spread the entire surface was determined, and the applicability was evaluated as follows.

Good: 0.1 g or less: O: Normal: 0.1 to 0.19 g: Δ: Bad: 0.2 g or more: X: (B) Wipeability An actual vehicle test was performed by 10 panelists for evaluation. Each of the automobiles cleaned and cleaned to remove dirt and dust was coated with a polishing agent with a sponge, wiped off after drying, and evaluated for resistance to wiping.

Evaluation Criteria 1: A strong feeling of resistance is required to finish the wiping at least twice.

2: There is resistance, but it can be finished with one wiping.

3: Finished with one wiping without any resistance.

 The display of the evaluation is as follows.

Good: 7 or more people rated 2, 3 ... ○ Normal: 6 or more people rated 2 ... △ Bad: 7 or more people rated 1, 2 ... × (C) Unevenness A glossy agent was applied to black and red automobiles and wiped off, and the glossiness of the gloss was visually evaluated.

Good: There is no gloss. … ○ mark Normal… There is a slight amount of gloss… △ mark Poor… There is a lot of difference in gloss… × mark (d) Oil film transferability to window glass Each glazing agent is applied to the roof of an automobile and wiped off After running for two weeks (four days on rainy days), the state of the oil film on the windshield was examined.

A: No oil film is observed.

B: An oil film is slightly observed.

C: There are many oil films.

Table 2 summarizes the results of the above evaluations in a list.

In addition, "B" indicates a blank test.

From Table 2, it can be seen that all of the examples of the present invention have excellent water repellency, have high antifouling properties, maintain the protection and aesthetics of automobile paint over a long period of time, and have good applicability and wiping properties. It has good workability and little application unevenness, and has little transfer of the oil film to the window glass.

In comparison, when looking at the comparative examples, when the water repellency and antifouling property are good as in Comparative Example 1, the workability is extremely poor, and when the workability is improved, as in Comparative Examples 2 to 4, The antifouling property and the water repellency persistence are reduced, and in Comparative Examples 2 and 4, the oil film easily transfers to the window glass.

[Effects of the Invention] The effects of the present invention are as described in detail in the operation section, but are briefly summarized as follows.

(1) Water repellency lasts for a long time.

(2) There is almost no adhesion of contaminants and the antifouling property is excellent.

(3) The polishing agent applied to the roof of the automobile does not transfer to the window glass as an oil film, and is effective for safe driving.

(4) Good workability, easy to stretch, easy to wipe off, no coating unevenness.

As described above, the polishing agent of the present invention is an epoch-making solution that solves all the problems of the conventional polishing agent, and exhibits high utility in maintaining the aesthetic appearance of automobiles for a long time and in traffic safety. Is what you do.

Claims (2)

(57) [Claims] (1) General formula (Wherein, R ₁ and R ₂ in the formula represent a linear or branched alkyl group having 8 to 30 carbon atoms, and m represents an integer of 1 to 6). A polishing agent characterized by dissolving, emulsifying or dispersing a film-forming component comprising two or more of 80 to 95% by weight and 5 to 20% by weight of a silicone oil in a liquid medium 5 to 100 times by weight thereof. 2. The general formula (Wherein, R ₁ and R ₂ in the formula represent a linear or branched alkyl group having 8 to 30 carbon atoms, and m represents an integer of 1 to 6). 80 to 95% by weight of a mixture of two or more kinds of wax and 5 to 20% by weight of silicone oil, and one or more kinds of the fatty acid bisamide compounds are 30% by weight or more based on the total amount of the film-forming components. The film-forming component is
A polisher characterized by being dissolved, emulsified or dispersed in a liquid medium in a weight-fold amount.