JPS61228073A - Synthetic resin paint containing stainless steel foil powder - Google Patents

Abstract

PURPOSE:The titled-paint, obtained by incorporating stainless steel foil powder treated with a specific amount of a surface treating agent in a synthetic resin paint, capable of enhancing the wettability of various synthetic resins for the stainless steel, coating thick, and having improved corrosion resistance and durability. CONSTITUTION:A paint obtaind by incorporating (A) 20-80wt%, based on the total weight of dried film, stainless steel foil powder, preferably ultrathin flake having 0.1-0.5mu thickness, 10-30mu length and 5-20mu width and effectively a high aspect ratio, treated with (B) 0.1-5wt%, based on the total weight, surface treating agent, e.g. a titanate coupling agent, in (C) a synthetic resin.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to a synthetic resin paint containing stainless steel foil powder, particularly a stainless steel coated with a surface treatment to improve the wettability between stainless steel and synthetic resin. This invention relates to a synthetic resin paint containing steel foil powder.

<Prior art and its problems> The purpose of painting is to maintain the beauty of the object to be coated and to prevent corrosion when the object to be coated is steel. In recent years, large steel structures such as ships, bridges, cranes, and chimneys are designed to be maintenance-free, with emphasis on corrosion prevention as well as aesthetics. This is because the weight of the painting cost in the total painting cost has decreased, and the cost of painting including scaffolding has increased significantly, so it is better to use more durable paint, extend the interval between coats, and reduce the number of coats. This is because there are advantages. Furthermore, there are other advantages such as reducing the number of dangerous high-place work operations during painting work, and avoiding a decrease in the operating rate of equipment due to painting work.

It is well known that stainless steel has good corrosion resistance and durability. However, stainless steel is expensive.

For this reason, it is thought that paints containing stainless steel powder should have excellent performance, but the reason why they have not been put into full-scale use is that stainless steel powder and foil pieces are not easy to manufacture and are expensive. Therefore, in addition to the economic reason that the price of paints containing this material is significantly higher than conventional paints, it is also clear from the fact that there is no paint that adheres well to stainless steel. There was a technical reason that the wettability of synthetic resins to stainless steel was poor, and as a result, even if stainless steel foil powder was contained, the original performance of stainless steel could not be demonstrated.

The present inventors have discovered that by treating stainless steel with various types of surface treatment agents, the wettability between stainless steel and various synthetic resins has been significantly improved, and as a result, the wetting of stainless steel with various synthetic resins has been significantly improved. It has been found that not only is corrosion resistance and durability achieved, but also thicker coating is possible compared to conventional stainless steel paints, improving workability.

While conventional anticorrosive paints have a lifespan of 5 to 7 years,
The synthetic resin paint containing stainless steel foil powder according to the present invention has two
It has a lifespan of over 0 years, and with existing stainless steel paint,
One coating film is at most 10 to 15 ILm, but this synthetic resin paint containing stainless steel foil powder has the advantage of being able to obtain a coating film of 25 to 30 ILm in one coating, which reduces the work cost. It is extremely effective, contributing greatly to reductions in energy consumption.

<Objective of the Invention> Therefore, the object of the present invention is to provide a stainless steel foil powder containing stainless steel foil powder that has high wettability with various synthetic resins on stainless steel and can be coated thickly, resulting in significantly improved corrosion resistance and durability. We are trying to provide synthetic resin paints.

<Structure of the invention> The above object is achieved by the following present invention.

That is, in the present invention, stainless steel foil powder that has been surface-treated with a surface treatment agent of 0.1 to 5% by weight based on the total weight of the stainless steel foil powder is added to a synthetic resin to cover all of the dried coating film. The object of the present invention is to provide a synthetic resin paint containing stainless steel foil powder, characterized in that it contains 20 to 80% by weight of stainless steel foil powder.

Hereinafter, the synthetic resin paint containing stainless steel foil powder of the present invention will be explained in detail.

The synthetic resins used in the present invention may be generally known synthetic resins commonly used in paints, such as alkyd resins, aminoalkyd resins, chlorinated rubber, vinyl chloride resins, polyvinyl butyral resins, silicone resins,
polyester resin, acrylic resin, polyurethane resin,
There are epoxy resins, phenolic resins, fluororesins, etc.

More specifically, the alkyd resins include phthalic acid resins that contain almost no oils and fats, short-oil-type, medium-oil-type, long-oil-type alkyd resins that contain oils and fats, and ultra-long-sleeve alkyd resins.

Amino alkyd resin is composed of urea resin or melamine resin and alkyd resin, and is usually used in baking paints.

Chlorinated rubber includes chlorinated natural rubber, synthetic rubber, and those modified with alkyd resins.

Vinyl chloride resin is a copolymer of vinyl chloride and vinyl acetate.

Polyvinyl butyral resin is made by saponifying polyvinyl acetate to form polyvinyl alcohol, which is then reacted with butyraldehyde, and is considered to be a terpolymer of acetal, vinyl alcohol, and hynyl acetate.

Silicone resin has a methyl group as an organic group.

It is a high molecular compound made of silicon and oxygen containing phenyl groups, and includes those modified with alkyd resins, epoxy resins, etc.

Polyester resin is an unsaturated polyester resin,
Including those crosslinked with vinyl monomers such as styrene.

Acrylic resins include methacrylic ester polymers used in lacquer types and copolymers of styrene and acrylamide acrylic esters used in baking types, as well as those modified with alkyd resins and urethane resins.

Polyurethane resins are composed of polyisocyanate compounds and polyol compounds, and include block types, catalyst curing types, and polyol curing types. Polyols are obtained by the reaction of epoxy resins, polyhydric alcohols, and alcohol amines. and acrylic polyols.

The epoxy resin may be a so-called bisphenol A type, a bisphenol F type, a borac type epoxy and an epoxy resin, and the curing agent may be a known curing agent, such as a polyamide resin, a polyamine, an adduct thereof, or a modified product thereof, or These include phthalic anhydride anhydrides.

The phenol resin is a 100% carbonic acid resin, a modified carbonic acid resin with rosin, or the like.

Fluororesin is polytetrafluoroethylene (Teflon)
, tetrafluoroethylene, etc.

The surface treatment agent for stainless steel foil powder according to the present invention is selected from titanate coupling agents, silane coupling agents, and nonionic coupling agents, or is a combination of several agents.

Specifically, titanate coupling agents include inpropyl triisostearoyl titanate, isopropyl tridodecylbenzenesulfonyl titanate, and tetra(2
, 2-diallyloxymethyl-l-butyl)bis(di-tridecyl)phosphite titanate, and examples of silane coupling agents include vinyltrichlorosilane,
Examples include vinyltriethoxysilane and vinyltris(β-methoxyethoxy)silane, and nonionic coupling agents include polyoxyethylene laurate, polyoxyethylene e-stearate, and polyoxyethylene oleate.

One type of these surface treatment agents is effective, but depending on the combination of stainless steel and synthetic resin, the type of solvent that makes up the paint, and the type of other additives, a combination of several types may be more effective. may rise.

These surface treatment agents have a coupling effect, an affinity effect, and a cilia effect on stainless steel and synthetic resins, so that as a result, the stainless steel is better wetted by the synthetic resin, and the stainless steel foil powder is better wetted with the synthetic resin. A deciduous deposit layer is formed in the synthetic resin, forming a strong coating film.

The above surface treatment agent is 0.1% for stainless steel foil powder.
Within the range of ~5% by weight, select a proportion that does not affect other additives.0 If the amount of surface treatment agent relative to the stainless steel foil powder is less than 0.1% by weight, the adhesion with the resin will be poor. This is because if it exceeds 5% by weight, the dispersibility in the resin will decrease.

One or more types of stainless steel foil powder may be used in combination.

The shape of the stainless steel foil powder used in the present invention is 0.1 to 0.5 microns in thickness, io to 3o microns in length, and 5 microns in width.
Ultra-thin pieces of ~20 microns are preferred, and those with a large aspect ratio (diameter:thickness) are effective.

The type of stainless steel is not particularly limited as long as it has excellent corrosion resistance, weather resistance, chemical resistance, abrasion resistance, etc., and stainless steel specified in JIS G 4301.4302 etc. , the type of steel suitable for the object to be painted, environmental conditions, etc. may be appropriately selected.

Generally known solvents or non-reactive diluents can be used in the synthetic resin paint containing stainless steel foil powder according to the present invention. Examples of these solvents include aromatic hydrocarbons such as toluene and xylene, aliphatic hydrocarbons such as mineral turpentine, ketones such as methyl ethyl ketone and methyl isobutyl ketone, esters such as ethyl acetate and butyl acetate, and a mixture of these,
Further, examples of the non-reactive diluent include petroleum resin, indencoumarone resin, and the like.

Generally known paint additives can be used in the synthetic resin paint containing stainless steel foil powder according to the present invention.
For example, organic bentonite, thixotropic agents such as anhydrous silicic acid powder, metal soaps, hydrogenated castor oil, anti-settling agents such as synthetic waxes mainly composed of ethylene oxide, dryers for alkyd resins, tertiary amines for epoxy resins, etc. Effect accelerators and the like may be added as necessary.

In the synthetic resin paint containing stainless steel foil powder according to the present invention, the blending ratio of the stainless steel foil powder, synthetic resin, and surface treatment agent is 20 to 20 in the dry coating film in the stainless steel foil powder.
Selection is made within the range of 80% by weight. If the amount of stainless steel foil powder in the dry coating film is less than 20% by weight, the strength of the coating will be poor due to insufficient foil powder, and if it exceeds 80% by weight, the coating will be poor due to insufficient resin. This is because no film is formed.

The functional differences between the conventional paint and the paint according to the present invention are explained in the first part.
The figure and FIG. 2 will be briefly explained.

FIG. 1 shows the change over time of a conventional coating material. FIG. 1a shows a state after the coating has been placed on a substrate 1, with coating particles dispersed in a resin 2. At the middle stage of drying, as shown in Figure 1b, degassing passages 4 for solvents, etc., begin to form and the surface shrinks.At the end of drying, as shown in Figure 1c, degassing passages 4 are formed in the thickness of the coating film, and this The paint film gradually deteriorates and has a shortened lifespan, requiring repainting within a short period of time.

FIG. 2 shows a second graph showing the aging of the paint according to the present invention.
Figure a shows the state after coating is applied onto the substrate 1, with surface-treated stainless steel foil powder 5 being dispersed in the resin 2. Since the stainless steel foil powder has been surface-treated, it has good compatibility with the resin 2 and the substrate 1, that is, good wettability, resulting in good adhesion. Furthermore, it is possible to apply thicker coatings without dripping than with conventional coatings.

Figure 2b shows the leveling of the coating film, and the stainless steel foil powder 5, which was oriented in various directions after the coating in Figure 2a, is now oriented horizontally in the same direction within the layer of resin 2. They are aligned and overlap each other. Although the degassing path 4 is created through the gaps between these stainless steel foil powders 5, it becomes a complicated path.

FIG. 2C shows the dry state, in which several layers (actually 3 to 7 layers) of stainless steel foil powder 5 overlap within the layer of resin 2. For this reason.

Degassing path 4 becomes unclear, and the paint film deteriorates from this part t4
The superimposed layer of stainless steel foil powder 5 is corrosion resistant,
It guarantees durability, has a long lifespan, requires a long period of time before repainting, and can reduce costs.

EXAMPLES Next, the present invention will be specifically explained with reference to Examples and Comparative Examples.

[Example 1-1] 350 parts by weight of an epoxy resin (Epicor #828, manufactured by Yuka Shell Co., Ltd.) having an epoxy equivalent of 180 to 200 was sufficiently kneaded by a conventional method and then treated with 2 parts by weight of isopropyl dimethacrylylisostearoyl titanate. Stainless steel foil powder (SUS316L, thickness 0.1-0.5 pot ■, width 5
~20 Lm, vertical 10~30 ILm) was added, and mixed and stirred in the usual manner to disperse the stainless steel foil powder in the epoxy resin to obtain 1000 parts by weight of paint A-1 liquid. . 550 parts by weight of an epoxy curing agent (Lackermite TD-966-H, manufactured by Dainippon Ink Co., Ltd.) and 450 parts by weight of a solvent such as butyl cellosolve were blended and thoroughly kneaded by a conventional method.
1000 parts by weight of paint B-1 liquid was obtained. A mixed paint made by mixing paint A-1 liquid and paint B-1 liquid in a ratio of 100 to 150 parts by weight has a dry film thickness of 40 to 5 by normal airless spraying.
It was possible to paint up to 0 units in 1 coat without dripping.

This mixed paint was applied to a dry film thickness of 50 ml according to JISK5400, and tested according to the pencil scratch test, boiling water resistance, and acid resistance (sulfuric acid
% solution), alkali resistance (caustic soda 5% solution), and salt water spray tests. The results are shown in Table 1.

[Example 1-2] Same procedure as Example 1-1 except that 2 parts by weight of γ-methacryloxypropyltrimethoxysilane was used instead of 2 parts by weight of isopropyl dimethacrylylisostearoyl titanate in Example 1-1. A paint A-2 liquid was obtained.

Paint B-1 was obtained in exactly the same manner as in Example 1-1.

A mixed paint made by mixing paint A-2 liquid/paint B-1 liquid in a ratio of 100150 parts by weight can be coated with a dry film thickness of 40 to 50 coats without sagging using a normal airless sprayer. Ta.

The same test as in Example 1-1 was conducted on this mixed paint. The results are shown in Table 1.

[Comparative Example 1-1] Same as Example 1-1 except that Improvir dimeccryl isostearoyl thiranate of Example 1-1 and γ-methacryloxypropyltrimethoxysilane of Example 1-2 were not used. Paint A-3 was obtained.

Paint B-1 liquid was obtained in exactly the same manner as in Example 1-1.

A liquid mixture prepared by mixing paint A-3 liquid/paint B-1 liquid in a ratio of 100,750 parts by weight could be coated with a dry film thickness of 10 to 15 liters without dripping by ordinary air spraying.

The same test as in Example 1-1 was conducted on this mixed paint. The results are shown in Table 1.

[Comparative Example 1-2] A commercially available epoxy resin paint, Copon P manufactured by Nippon Paint, was coated as a primer with a dry film thickness of 60 ml and a top coat dry film thickness of 35 ml at a predetermined coating interval. A similar test was conducted. The results are shown in Table 1.

[Example 2-1] 550 parts by weight of a medium oil alkyd resin, 147 parts by weight of a solvent such as Kijirol, and 3 parts by weight of an anti-settling agent were blended and thoroughly kneaded by a conventional method to obtain 2 parts by weight of isopropyl tridodecylbenzene sulfonyl titanate. Stainless steel foil powder treated with (SUS 316 IJlO, 1~0.5
×5 to 20 layers horizontally.

300 parts by weight of 10 to 30 IL (longitudinal) were added and mixed and stirred in a conventional manner to uniformly disperse the stainless steel foil powder in the alkyd resin to obtain 11,000 parts by weight of paint C-1.

This coating $4C-1 could be coated with a dry film thickness of 40 to 50 liters without sagging using a normal airless sprayer.

This paint was applied to a total dry film thickness of 50 l according to JISK5400, and tested according to JISK5400 with a pencil scratch test, boiling water resistance, acid resistance (5% sulfuric acid solution), alkali resistance (5% caustic soda solution), and salt water spray. The test was conducted. The results are shown in Table 1.

[Example 2-2] Inpropyl tridodecylbenzene of Example 2-1
Paint C-2 was obtained in the same manner as in Example 2-1, except that 2 parts by weight of γ-glycidoxy propyl trimethoxysilane was used instead of 2 parts by weight of sulfonyl titanate.

This paint C-2 could be coated in one coat with a dry film thickness of 40 to 50p without sagging using ordinary airless spraying.

Examples of this paint C-2? The same test as in -1 was conducted. The results are shown in Table 1.

[Comparative Example 2-1] Example 2-1 except that inpropyl tridodecyl benzene sulfonyl O titanate of Example 2-1 and γ-glycidoxy propyl trimethoxysilane of Example 2-2 were not used. Paint C-3 was obtained in the same manner as above.

This paint C-3 could be coated in one coat with a normal airless sprayer to a dry film thickness of 10 to 15 gm without dripping.

This paint C-3 was subjected to the same test as in Example 2-1. The results are shown in Table 1.

[Comparative Example 2-2] A commercially available full-kid resin paint, Kanaesabiz A, was coated over and over again at a predetermined coating interval using 2 coats of primer x dry film thickness of 25 ILm/10 coats and 1 coat of dry film thickness of 50 ILm.
A test similar to 1 was conducted. The results are shown in Table 1.

[Brief explanation of the drawing]

Figures 1a, ib and 1c are diagrammatic cross-sectional views showing the conventional paint immediately after application, in the middle of drying, and at the end of drying, respectively. Figures 2a, 2b and 2c are diagrammatic cross-sectional views showing the stainless steel foil powder-containing paint according to the present invention immediately after application, at the time of leveling the paint film, and at the completion of drying, respectively. Explanation of symbols l...Substrate, 2...Resin, 3...Coating particles, 4...
Degassing path, 5... stainless steel foil powder

Claims (1)

[Claims] (1) 0.1 to 5 based on the total weight of stainless steel foil powder
A stainless steel foil powder comprising a synthetic resin containing 20 to 80% by weight of stainless steel foil powder surface-treated with a surface treatment agent of 20 to 80% by weight based on the total weight of the dry coating film. Body-containing synthetic resin paint.