JPH0619067B2 - Two-component reaction hardening type anticorrosion and anticorrosion paint - Google Patents

Description

TECHNICAL FIELD The present invention relates to a two-component reaction hardening type rust preventive and anticorrosive paint for coating a structure made of steel or concrete to protect the surface of the structure. .

[Prior Art] Steel structures are widely used in tanks, bridges, sluices, water treatment facilities, chemical plants, building steel frames, and the like. Since these structures are used for a long time under severe conditions such as raindrops, seawater, or chemical substances,
It is necessary to protect the structure surface by applying rust prevention and anticorrosion treatment.

For this purpose, various two-component reaction curing type coating materials have been proposed.

This two-component reaction type rust-preventing and anticorrosive coating is used by mixing a main agent containing rust-preventing, anticorrosive and pigment and a curing agent, and various resins are used for reaction curing. As the type of resin, various resins such as acrylic urethane resin, fluorine resin, polyurethane resin, etc. are used in addition to epoxy resin and urethane resin, depending on the application.

The main agent and the curing agent are housed in separate containers, and the main agent and the curing agent are mixed at the time of use to react them, and the mixed liquid is applied to the structure.

Generally, the commercially available paint is 1 when 2 liquids are mixed.
The main agent and the curing agent are sold as a set so as to have a capacity of 6 or 4.

FIG. 1 shows an example of a container for this type of paint, in which a container 1 containing a main agent and a container 2 containing a curing agent are stacked and supplied as one set.

As a matter of course, the volume ratio of the container 1 and the container 2 is matched with the mixing ratio of the main agent and the curing agent specified by the paint.

The container 1 and the container 2 can be easily separated, and a lid similar to the lid 3 attached to the upper surface of the container 2 is attached to the upper surface of the container 1.

The mixing ratio of the main agent and the curing agent is set variously depending on the paint, and for example, the volume ratio is 1: 1, 3: 1, 4: 1, 7
1 to 1, and in weight ratio, 4 to 1, 3 to 2, 7 to 1, 8
Complex mixing ratios of 5 to 15 have been used.

In order to exert the performance as a paint, it is important to keep the mixing ratio specified for each product accurately, and the main agent and the curing agent must be sufficiently stirred and mixed.

It is necessary to age the mixed paint for a certain period of time before the start of painting, but this aging time also varies from product to product.
For example, it is specified as 10 minutes, 30 minutes, and 60 minutes under an environment of 20 ° C.

When coating the structure after aging, a coating is first formed from a base coat, an intermediate coat and a top coat. The number of times of undercoating, intermediate coating, and topcoating is determined as necessary, but usually, one or two coatings are repeated.

For the coating, each coating means such as brush, roller, air spray, airless spray, etc. is selected, but the paint can be diluted with a solvent such as thinner if necessary. The pot life of the two-component reaction curing type coating is determined for each product, and once the main agent and the curing agent are mixed, the curing reaction proceeds and must be used within a certain period of time. There are restrictions.

Therefore, it is desirable to prepare a required amount of coating material by mixing and stirring the main agent and the curing agent each time according to the area to be coated.

However, if all 4 or 16 sets of the main agent and the curing agent are used at one time, the specified mixing ratio is obtained by mixing all the amounts of the main agent and the curing agent contained in each container. However, it is very difficult to obtain an accurate mixing ratio when a small amount of a main agent and a curing agent less than that are extracted from each container and used. In practice, since the mixing and stirring work is performed at the site where the coating is performed, it becomes more difficult to prepare a proper amount of paint having an accurate mixing ratio.

For mixing and stirring, the main ingredient and curing agent are placed in a mixing container and stirred using a bamboo spatula or a rotary stirrer. There is a possibility that the mixing and agitation of the liquids of the parts may not be sufficiently performed.

Due to various reasons such as the above, the mixing ratio is not accurate,
Or, it may occur when coating is performed using a paint that is not sufficiently stirred, but when such an incomplete paint is used, for example, (a) curing and drying do not proceed at a specified speed. However, the hardness of the coating film is insufficient, and peeling, swelling, etc. occur when coating is repeated.

(B) Curing and drying are too fast, and the coating film is excessively cured, which causes defects such as cracks in the coating film.

In order to avoid these problems, it is sufficient to accurately measure and mix the main agent and the curing agent, and sufficiently stir to form the paint, but for this purpose, it is necessary to always have a measuring container and a stirrer. However, it is difficult to maintain the above work accurately every time the mixing and stirring work is repeated at the painting site.In practice, the mixing ratio can be determined by one's own amount, and the degree of stirring can be estimated by experience. There is.

Under such a circumstance, in the conventional two-component reaction curing type coatings, the main component is a coating liquid containing a pigment, and most of the curing agents are transparent or pale yellow. The color of the paint when the two liquids are mixed is such that the hue of the main agent appears as it is.

Therefore, the hue of the paint is not affected by the ratio of the curing agent mixed with the main agent, and the hue is not changed by the degree of stirring.

This property is one of the important properties of paints. That is, when the paints of a certain pattern are used, it is natural that the paints of the same hue should always be obtained, and particularly in the case of the top-coating paint which is the makeup paint, accurate hue reproduction is required.

[Object of the Invention] The present invention provides a two-component reaction curable coating material for undercoating or intermediate coating which does not affect the topcoat that determines the aesthetics of the structure, based on the results of the current situation analysis as described above. In comparison with the demand for paint color reproducibility, it is technically more necessary to ensure the correct mixing ratio and sufficient agitation for the performance of the paint. Focusing on (1), the present invention provides a coating material that eliminates the conventional problems.

[Structure of Invention]

The present invention relates to a two-component mixed reaction type rust preventive and corrosion preventive paint,
A liquid main agent containing a material having an anticorrosive and anticorrosive action, a resin material, and a pigment having a first hue, and a material that undergoes a curing reaction when mixed with the resin material of the main agent and a second hue different from the first hue The basic constitution of the invention is composed of a curing agent containing a pigment having a hue and a hue sample showing the third hue exhibited by the mixed liquid when the main agent and the curing agent are mixed in a prescribed ratio. .

[Operation of the invention]

In the present invention, the main agent contains a material exhibiting a first hue, and the curing agent contains a material exhibiting a second hue. Since a hue sample showing the hue of is mixed, the main agent and the admixture are mixed according to the change in the mixing ratio of the main agent and the admixture when an arbitrary amount of mixed liquid (paint) is prepared. Focusing on the fact that the hue of the liquid changes, by adjusting the mixing ratio of the mixed liquid so as to obtain the same hue as the hue sample, it is possible to easily obtain a mixed liquid having a prescribed mixing ratio.

Further, by continuing the stirring until the hue of the mixed liquid becomes uniform, it is possible to easily achieve uniform mixing and stirring of the main agent and the curing agent, which are important requirements for the two-component reaction curable coating material.

It should be noted that the hue of the paint becomes darker when the mixed liquid is applied to the surface of the structure and is in a dry state than in the mixed liquid state.

Therefore, as the third hue as a hue sample, both the hue in the mixed liquid state and the hue in the dry state are prepared.

〔Example〕

In the two-component reaction curable coating material for undercoating and intermediate coating of the present invention, the main component contains a material having a first hue, and the curing agent has a second hue having a hue different from the first hue. Is included. Then, when the main agent and the curing agent are mixed and stirred at a prescribed ratio, the mixed liquid is composed of the material having the first hue contained in the main agent and the material having the second hue contained in the curing agent. As a result, they will be mixed and will exhibit a third hue.

Therefore, if the third hue is prepared in advance as a hue sample and the main agent and the curing agent are mixed using this hue sample as a guide, an appropriate mixing ratio can be obtained without requiring any measuring device. It is possible to achieve sufficient agitation by agitating the mixed solution until there is no unevenness in hue.

The combination of the pigment and the hue to be contained in the main agent and the curing agent may be various in consideration of the components of the main agent and the curing agent, the mixing ratio, the difficulty of comparing the hue of the mixed solution with the hues of the main agent and the curing agent, and the like. Combinations can be adopted.

As an example, an experiment was conducted by preparing a material to be used by mixing a seed agent and a curing agent in a weight ratio of 60 parts to 40 parts according to the following specifications.

Main component (white) weight ratio Medium molecular weight epoxy resin liquid 18 Low molecular weight epoxy resin liquid 9 Titanium oxide (white pigment) 15 Coating film adjusting agent 1.0 Sag inhibitor 0.5 Solvent balance 60 parts Curing agent (black) Weight ratio Modified resin liquid 20 Body pigment 8.8 Anti-sagging agent 0.8 Polyamide resin liquid 7 Carbon black (black pigment) 0.2 Solvent balance 40 parts in total As described above, a main agent having a first hue of white, and
A curing agent exhibiting a second hue, black, is prepared, and the main agent and the curing agent are mixed at a ratio of 60 parts by weight to 40 parts by weight in a prescribed mixing ratio and stirred to prepare a mixed liquid sample. This mixed liquid exhibits a third hue, gray, but this mixed liquid was prepared as a hue sample.

It should be noted that the hue of the paint becomes darker when the mixed liquid is applied to the surface of the structure and is in a dry state than when it is in the mixed liquid state.

Therefore, as the third hue as a hue sample, both the hue in the mixed liquid state and the hue in the dry state are prepared.

Next, an arbitrary amount of white base material was placed in a mixing container, and the weight of the base material was measured. After that, inject black curing agent little by little into the mixing container, mix and stir while comparing with the hue sample,
The injection of the curing agent was continued until the hue of the hue sample was the same.

The injection of the curing agent was stopped when the hues of the hue sample matched, and the mixture was stirred until it became a uniform hue.

The weight of the completed mixture was weighed and the specified 60
It was confirmed to be close to the mixing ratio of 40 parts to 40 parts.

By repeating the experiment, it was confirmed that even if the two liquids were mixed while only the hue of the sample was being reflected, a mixed liquid having a mixing ratio sufficiently accurate for practical use could be reproduced.

It was confirmed that the desired performance can be achieved by using the coating thus prepared after aging for coating.

Therefore, as shown in FIG. 1, the container 1 containing the main agent
When the container 2 containing the curing agent and the curing agent are overlapped and supplied as one set, either the container 1 containing the main agent or the container 2 containing the curing agent, or both as the hue sample 5 or 6 By applying the paint or printing the hue, or pasting the printed matter of the hue of the paint,
It can be used as a guideline for the mixing operation of the main agent and the curing agent.

As the attachment point of the hue sample, in addition to the container containing the main agent and the curing agent, it is applied or printed on the surface of the outer box containing these containers, or attached to the instruction manual, etc. Appropriate means of can be considered.

[Advantages of the Invention] As described above, in the present invention, in the two-component reaction curing type rust-preventing and anti-corrosion coating material, a material having a rust-preventing and anti-corrosion action, a resin material and a first hue are used as the material constituting the liquid main component. A pigment having a second hue that is different from the hue of the material of the main agent and the material that causes a curing reaction when mixed with the resin material of the main agent is used as the material of the liquid curing agent. Then, the third hue exhibited by the mixed liquid when the main agent and the curing agent are mixed in a prescribed ratio is previously used as a hue sample, and is applied or printed on the surface of the container or the like containing the main agent and the curing agent. When the main agent and the curing agent are mixed, by mixing the main agent and the curing agent so as to match the hue sample, it is possible to easily obtain a mixed liquid satisfying the specified mixing ratio.

Therefore, without using measuring containers or instruments,
A mixed solution having an accurate mixing ratio can be prepared at any time, and the coating work efficiency can be improved.

Also in the mixing operation of the main agent and the curing agent, it is possible to sufficiently stir the mixed liquid by performing the mixing and stirring until the hue of the mixed liquid exhibits a uniform hue. In this case, since liquids of pigments having different hues contained in the main agent and the curing agent respectively appear in a striped pattern, insufficient stirring can be immediately detected, and an accurate mixing ratio and a good two-component reaction curing type It is possible to obtain anti-corrosion and anti-corrosion paints.

As the hue sample, a third hue sample represented by a pigment in a mixed liquid state obtained by mixing pigments having the first and second hues may be prepared, or a print sample of this hue may be used.

It should be noted that the hue of the paint becomes darker when the mixed liquid is applied to the surface of the structure and is in a dry state than when it is in the mixed liquid state.

Therefore, as the third hue as a hue sample, both the hue in the mixed liquid state and the hue in the dry state are prepared.

These hue swatches should be affixed to the surface of the container that contains the main agent and curing agent, as well as to the surface of the outer box that contains the container, or attached to the instruction manual enclosed in the outer box. This makes the work easier.

[Brief description of drawings]

 FIG. 1 is an explanatory view showing an embodiment of the present invention. 1 ... Base agent container 2 ... Hardener container 5, 6 ... Hue sample

Claims (3)

[Claims] 1. A liquid main agent containing a material having a rust preventive and anticorrosive action and a resin material, and a liquid hardener containing a material which undergoes a curing reaction when mixed with the resin material of the main agent, in separate containers. In a two-component reaction hardening type rust-preventive and anti-corrosion paint of a type in which the main component and the hardener are mixed and stirred at a predetermined ratio at the time of use and the mixture is used as a paint when used. Liquid main agent containing a material having a resin and a pigment having a first hue, a material that undergoes a curing reaction when mixed with the resin material of the main agent, and a pigment having a second hue different from the first hue A liquid curing agent containing
When the base material and the curing agent are mixed, the pigment having the first hue and the pigment having the second hue are mixed, and when the mixing ratio of the base material and the curing agent becomes a prescribed mixing ratio, the mixed liquid presents A two-component reaction hardening type rust preventive and anticorrosive paint, which comprises: a hue sample showing a hue of 3. 2. The hue sample representing the third hue is displayed on the surface of at least one of the separate containers containing the main agent and the curing agent. The two-component reaction-curable rust-preventive and anticorrosive paint according to 1. 3. The two-part liquid according to claim 1 or 2, wherein the hue sample representing the third hue is displayed on the surface of a separate outer box containing the main agent and the curing agent. Reaction hardening type rust and corrosion resistant paint.