JPS6035064A - Anti-corrosive and topcoating synthetic resin oil paint - Google Patents

Abstract

PURPOSE:To provide a paint having both excellent anti-corrosive and topcoating functions, by incorporating a phosphate or molybdate anti-corrosive pigment, an unsaturated fatty acid ester and a polyamide thixotropic agent in a synthetic resin oil paint. CONSTITUTION:0.5-5wt% phosphate or molybdate (e.g. zinc molybdate) anti- corrosive pigment, 0.5-2wt% unsaturated fatty acid ester selected from among ethyl oleate, methyl linoleate, ethyl linoleate, methyl linolenate, ethyl linolenate, butyl linolenate or ethyl elaidate, 0.3-1wt% polyamide thixotropic agent obtd. by reacting a 16-20C fatty acid with a polyamine and other components such as pigment, vehicle resin, etc. are mixed together in such a proportion as to give a pigment volume concentration of 20-35%, thus obtaining the desired anti-corrosive, topcoating synthetic resin oil paint.

Description

DETAILED DESCRIPTION OF THE INVENTION (2) The present invention relates to a synthetic resin compound paint that has both functions, that is, has a rust-preventing effect and can be coated in a thick film.

Conventionally, when painting steel structures such as pipes, tanks, buildings, bridges, and ships, the base surface of the iron part to be painted is first polished to a metallic luster using Type 1 or Type 2 staining. Then apply a general-purpose rust preventive paint based on JIS K-5 6 2 1, such as oil-based alkyd resin rust preventive paint, once or twice until the film thickness is approximately 35)L~
Paint to about 70 tones, and then apply JIS K-5 5, such as oil-based alkyd resin topcoat paint.
A synthetic resin composition paint based on No. 16 is applied once or twice to a film thickness of approximately 25 μm to 50 μL.

That is, the anti-rust paint provides anti-corrosion properties, and the top coat paint provides aesthetics and durability such as water resistance and weather resistance.

Therefore, when painting with the conventional paint system as described above, it is necessary to first carefully prepare the base, then apply two (3) coats of one coat of anti-rust paint and one coat of top coat. In order to increase durability, increase hiding power, and improve aesthetic appearance, it was necessary to increase the number of times each coat was applied.

The inventor of the present invention has conducted intensive research to make the substrate preparation as simple as possible and reduce the number of coatings as much as possible in the above-mentioned coating system. There are three types of Keren,
Furthermore, we have completed the present invention by discovering a synthetic resin compound paint that can be applied to a thick film of approximately 60 μm in one coat, and which also functions as a conventional anti-rust paint and top coat paint.

That is, the present invention provides (A)! in a synthetic resin compound paint. phosphate-based or molybdate-based rust-preventive pigment 0.5-5%, (+'l) ethyl oleate, methyl linoleate, ethyl linoleate, methyl linoleate, ethyl linoleate, butyl linoleate , at least one unsaturated fatty acid ester selected from the group consisting of ethyl elaidate 05-2
% by weight, and (C) C+a~! A polyamide-based thixotropic agent produced by the reaction of a fatty acid of 0.0 with a polyamine.
3 to 1% by weight, and the pigment volume concentration (pvc
) is 20 to 35%, and provides a synthetic resin compound paint that can be used as a rust preventive top coat.

The above component (A) used in the present invention is used to impart a rust-preventing effect to the paint film.It has a rust-preventing effect in a small amount, and does not adversely affect the gloss of the paint film. It is a low toxicity, non-polluting rust preventive pigment, and phosphate rust preventive pigments include ortho and condensed phosphates such as zinc, calcium, magnesium, titanium, and silicon, and molybdate rust preventive pigments. Pigments include zinc molybdate, calcium molybdate, zinc calcium molybdate, zinc potassium molybdate, aluminum molybdate,
Aluminum phosphomolybdate is mentioned.

These anti-rust pigments are contained in the total paint in a range of 0.5 to 5 (5)% by weight.If the content is less than 0.5% by weight, no rust-preventing effect is exhibited; If it exceeds % by weight, the gloss of the coating film will be significantly reduced, which is undesirable.0 The component (B) used in the present invention prevents the occurrence of rust,
It also penetrates into the generated rust and solidifies the rust or prevents the progress of rust. Examples of such unsaturated fatty acid esters include ethyl oleate, methyl linoleate, ethyl linoleate, and methyl linoleate. At least one unsaturated fatty acid ester selected from the group of , butyl lylunate, and ethyl elaidate.

These unsaturated fatty acid esters are present in the entire paint from 0.5 to
Contain within the range of 2% by weight; if the content is less than 0.5% by weight, rust prevention will not be achieved, and if it exceeds 2% by weight, the drying properties and weather resistance of the coating will decrease. Therefore, it is not desirable.

The amount of component (C) used in the present invention is approximately 60% per coating.
) This is to prevent problems such as sagging (6) even if a thick film of 1 degree is applied, and such thixotropic agents include (ts~: Examples of the agent include Disparon #6900-20x (trade name, Kusumoto Kasei Co., Ltd.), Tarene #111-7200-20 (trade name, Kyoeisha Yushi Co., Ltd.), and the like.

These thixotropic agents should be contained in the range of 0.5 to 1% by weight in the total paint. If the content is less than 0.5% by weight, problems such as dripping may occur when a thick film is applied at one time. On the other hand, if it exceeds 5% by weight, it is not preferable because it reduces the gloss of the coating film.

In addition to the above-mentioned components (A) to (C), the paint of the present invention also contains long-oil alkyd resins used in synthetic resin compound paints based on JI8 K-5516, or their vinyl, urethane, phenol, epoxy, etc. The base vehicle resin components such as modified resins are essential components, and color pigments such as titanium oxide, Bengara, cyanine blue, yellow lead, and carbon black, calcium carbonate, (
7) Additives such as clay, extender pigments such as precipitated barium sulfate, mineral turpentine, solvents such as Swasol #310, drying accelerators such as aluminum alcolade, dryers, pigment dispersants, anti-scaling agents, etc. It can be included.

In addition to the rust-preventing pigment (A), the paint according to the present invention may contain other pigments such as rust-preventing pigments, coloring pigments, extender pigments, etc.; pvc) is contained in the range of 20% to 35%; if the pvc is less than 20%, the rust prevention ability of the paint film will decrease or a sagging phenomenon will occur, and conversely if it exceeds 35% In such a case, the gloss of the coating film and the permeability to the rusted surface will decrease, which is not preferable.

The paint of the present invention can be prepared by uniformly mixing and dispersing the above-mentioned components in a sand mill or the like using a conventional commercial manufacturing method, and can be applied by an appropriate method such as a brush, a roller, or an airless spray.

The paint of the present invention contains the above-mentioned components (A) to (C) in a specific fik, and further contains a pigment so that the pvc falls within a specific range, thereby achieving a coating system that is different from that of conventional synthetic resin compound paints. The number of man-hours required for surface preparation and number of coatings can be significantly reduced.

The present invention will be explained below with reference to Examples.

Examples 1-3 and Comparative Examples 1-6 Paints of Examples 1-3 and Comparative Examples 2-6 were prepared by uniformly mixing and dispersing each component shown in Table 1 using a sand mill trowel.

Further, as the paints of Comparative Example 1, a commercially available rust-preventing paint (quick-drying anti-rust paint) K-21: Shinto Paints) and a synthetic resin blend paint as a top coat (SP Pain Sakura D: Shinto Paints) were used.

The paint on each side was applied with a brush to a rusted steel plate from which floating rust had been removed with sandpaper, and the performance of the coating was tested.

(10) (Note 1) Dainippon Ink Co., Ltd. Oil length 65% 1 Non-volatile content 70%
Soybean oil-modified alkyd resin (Note 2) Zinc phosphate manufactured by Kikuchi Shiki Co., Ltd. (Note 3) Zinc molybdate manufactured by Sherwin Williams (Note 4) Condensed aluminum phosphate manufactured by Teikoku Kako Co. (Note 5)
Thixotropic agent manufactured by Kusumoto Kasei Co., Ltd. (Note 6) Thixotropic agent manufactured by Kyoeisha Yushi Co., Ltd. (Note 7) Titanium oxide manufactured by Ishihara Sangyo Co., Ltd. (Note 8) Calcium carbonate manufactured by Shiraishi Kogyo Co., Ltd. (Note 9) Calcium carbonate manufactured by Maruo Calcium Co., Ltd. (Note 10)
Aluminum Alcolade drying accelerator manufactured by Yoken Fine Chemical Co., Ltd. (attention) Methyl ethyl ketoxime manufactured by Toagosei Co., Ltd. (Note 12) Surface adjustment (Note 13) 60° specular reflection (Note 14) Weather offset 500 hours 20 - Abnormality None, △---- Gloss fading, some chalking, ×---
The gloss has faded and there is significant chalking.

(Note 15) was dropped on paper with a 10% diluted solution of mineral turpentine in 05, and its spread was observed: 0--- Good penetration, x-m- almost no penetration Note 16) Tsuruto Spray 9 Time 20m - No abnormality

Claims (1)

[Claims] 1. In the synthetic resin compound paint, (A)! J phosphate or molybdate rust preventive pigment 0.5-5% by weight (B) Ethyl oleate, methyl linoleate, ethyl linoleate, methyl linoleate, ethyl linoleate, butyl linoleate, ethyl elaidate At least one unsaturated fatty acid ester selected from the group consisting of 0.5 to 2
% by weight and (c) a polyamide-based thixotropic agent formed by reaction of a cta to 2o fatty acid with a polyamine in an amount of 0.3 to 1% by weight, and a pigment volume concentration of 20 to 35%. A synthetic resin compound paint that can be used as a top coat.