JPS58187469A - Rust-preventive material having resistance to chipping - Google Patents

Abstract

PURPOSE:To obtain the titled material having excellent adhesivity, sound insulation, shock absorptivity, etc. as well as rust-preventive property, and suitable for coating of the exterior metal plate of a vehicle, by mixing a specific water- dispersible acrylic resin, a powdery filler and a non-toxic rust-preventive pigment at specific ratios. CONSTITUTION:The objective rust-preventive material having resistance to chipping is prepared by mixing (A) 100pts.wt. (solid content) of a water-dispersible acrylic resin having a second order transition point of <=0 deg.C [e.g. (co)polymer of ethyl acrylate, etc.], (B) about 70-250pts.wt. of a powdery filler (e.g. talc), (C) about 10-100pts.wt. of a non-toxic rust-preventive pigment (e.g. a phosphate-type rust-preventive pigment such as zinc phosphate), and if necessary, (D) a preservative, a dispersing agent, a thickener, etc. The material resistant to chipping is applied e.g. to the coated surface of a fuel tank manufactured by the sheet- metal processing fo a copper plate plated with lead-tin alloy, at a dried film thickness of about 200-800mu.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applied to the surface of processed sheet metal parts, such as plated steel sheets such as lead-tin alloy plated steel sheets, for excellent rust prevention effects. Regarding a chipping-resistant material with excellent rust prevention properties, which can also serve as an excellent chipping-resistant material that protects the plating from IIs scratches caused by flying stones, etc., plated steel sheets such as lead-tin alloy medium steel sheets Special attention is given to the secondary layer properties after the water resistance test, soundproofing, gasoline resistance, cold flexibility, flame resistance,
For example, regarding a chipping-resistant material with excellent rust resistance and excellent corrosion resistance, which can form a flat thin film,
A thin film such as 00μ can exhibit excellent chipping resistance exceeding 3Ot-.

The antidiarrheal and chipping-resistant material of the present invention can be applied to various types of plated steel plates, such as lead-monoalloy plated plates, -metal plated steel plates, aluminum plated steel plates, lead plated steel plates, chrome plated steel plates, nickel plated steel plates, and other types of plated steel plates. It is useful for forming a residual protective coating on plated steel plates such as gold-plated plates. These plated steel plates are manufactured using the cis plating method.
It may be plated by a conventional method such as a hot-dip plating method, a diffusion method, or a spraying method.

In addition, the present invention provides (A) a water-dispersible acrylic fruit tree MVtoomiifflS (solid content) with a secondary transition point of 0°C or less, [B] Powder Denko Jl about 70 to about 2S Ojit part, and El m1la The present invention relates to a non-metallic solvent-based rust-proof and anti-chip binder material which is made from about 10 to about 100 ml of water and is intended for use on the exterior of vehicle interior sheet metal parts.

Rust prevention properties of the present invention = Chitsubin R Material Fi Lead-tin alloy plated steel plate, lead-metal plated steel plate, etc. are used more often, but 1% is less than 1%. Clams are often used as gasoline tank materials.
This 46 is suitable for application to tin alloy plated steel sheets.
The present invention will be explained using a meeting as an example.

Steel materials coated with lead-tin alloy plating are called tan sheets.
It is manufactured by the four-melting plating method, and the lead is lJ''''
C is iron and opposite to 6, plated Tako note is poorly rounded, about 10
~20 inches long, with a 6-inch plated coating on the main length of the iron-tin alloy. This metal plating is extremely thin and the sheet metal ball does not stick to the main body, so it is often used as a fuel tank for automobiles.

If the tan sheet r has no scratches on the plating surface, it is extremely good.
Although it is a steel plate that can be used as a protective horizontal sword, it is extremely susceptible to rust if the plated surface is damaged due to scratches, etc. Taking a gasoline tank as an example, the underside of the df sled/tank 4 self-excited vehicle @
A so-called chipping-resistant material is applied to the exterior of a vehicle to protect the plated surface from scratches and scratches caused by flying stones and the like when the vehicle is mounted and driven.

However, during the sheet metal processing of the tank, there were scratches on the plating surface, or a seam that created an OVL when the lower half was welded together by JO. Iron l1iIi of the seam product due to plating welding of the part
Due to the VC, there are scratches and seams that are extremely susceptible to rust. -111V, which is called a chipping-resistant material that has been traditionally used for AC.
[In some cases, when applied with high conversion rhinoceros on plated steel sheets with no iron self-binding or on electrodeposition coatings, chipping resistance of certain fence flies is observed, but the chipping resistance effect with 4 film thickness is observed. is unsatisfactory, and secondly, I would like the anti-corrosion effect of the S-preserving coating film alone to be extremely high, and especially with the aqueous chipping-resistant material composition VC, I cannot help but expect the anti-rust effect to be even higher. As mentioned above, there is a problem in that rust occurs in the cracked parts of the construction and on the iron facing Fujide part VC such as the upper part of the VC during the flat period, and improvement thereof was expected to be 5 <'11'. - There is a concern that Takumai's chipping-resistant material has convex patterns on the paint film, and is susceptible to scratches and scratches if there are stepping stones in the recesses.
) Water-resistant gravel, bamboo &
The improvement was also reduced by -1 because there were concerns about the density of the direct injection.

The present invention J, etc. V, various defects of the above-mentioned chipping-resistant material J
I have been conducting research on historical clothing.

As a result, ml [A] water-forgiving acrylic sphere resin.

[A composition comprising B'3 Powdered Light Material and (C'') S-free antirust pigment as essential ingredients and supplementary components is, for example,
IIfVC can protect sheet metal processed materials such as plated steel plates from internal rust and external chipping, and has an outstanding chipping-resistant effect that protects adherents from scratches caused by flying stones, etc. Chipping resistant material - It has excellent rust prevention effect at abrasion 1, can form a flat and durable coating film, and has a thin film thickness, and exhibits its outstanding 17 effects. SAMURAI, apart from the second edition after the dramatic water test Gorge, is an excellent vehicle exterior sheet metal member with excellent rust resistance, layering properties, soundproofing properties, 1 gasoline properties, I+4 cold flexibility, flame resistance, impact resistance, and VC. It has been discovered that this material can be used as a non-corrosive, anti-corrosion and anti-corrosion material for temporary storage.

According to the research of the present invention 4, etc., the above three components (A) moisture acrylic resin, (l powder filler) and [C] non-M injection It is believed that this is because they work in tandem with each other as a bath agent type anti-corrosion and anti-chip material. Excellent chipping resistance and rust prevention despite thin flat coating film formation and thin VC film thickness.In addition, it has excellent chipping resistance and anti-corrosion properties, as well as secondary layering properties with a carrying capacity of 7t, soundproofing properties, gasoline resistance, and cold bending properties. , flame resistance, impact resistance tI:
It was found that the modification of Nato led to the removal of the scourge quality.

By using Vt#, the object of the present invention is to provide a rust-proof and chipping-resistant material that has both excellent rust prevention and chipping resistance, and also has the highest level of excellent friendliness and chipping resistance. ).

In this way, it is possible to provide a method for protecting a vehicle exterior sheet metal member, which requires applying the chipping resistance to the sheet metal member.

OBJECTS AND HISTORY OF THE INVENTION Many other objects and advantages of the invention will become more apparent from the following description.

As an example of the acrylic resin having a water content of 0° C. or lower and having a second-order transition point of 0° C. or less, resins such as FJ can be exemplified. For example, styrene, alkyl styrene, acrylic acid or methacrylic acid-reactive alkyl, acrylonitrile, acrylamide, sN-methylol acrylamide, methacrylonitrile, acrylic or methacrylic acid, etc. 9, such as hydrocarbon esters having an alicyclic or aromatic ring Examples of resins that can be used include water ridge injection acrylic resins with a secondary transition point of QC or lower.

Preferred combinations include, for example, acrylic acid, acrylic isoglobil, acrylic acid-n-glopyl, isobutyl acrylate, acrylic di-n-butyl, acrylic #-2-ethylhexyl, and the like. Coalescence or copolymerization, etc.? 11 can be shown.

The above-mentioned acrylic resins can be manufactured manually on the market and can be used in a range of 9≧light.

Depending on the rust-proof and chipping-resistant material of the present invention,
Add water-resistant resins such as stainless steel rubber latex, glutyl rubber latex, vinyl acetate emulsion, vinyl acetate emulsion, polyurethane water-repellent liquid, nitrile-vinyl rubber, etc. Again, the solid content should be 30 m- or less with respect to the moisture-friendly resin LA) component yc.

In the rust-proofing and chipping-resistant material of the present invention, a powder filler is selected as the light material [B] used in combination with the nine-hole [A) resin in Example B above.

The rust-preventing and chipping-resistant material of the present invention can be formed into a flat S coating without uneven appearance, and can exhibit excellent chipping resistance even with a thin film thickness. It is important to avoid mixing asbestos fibers, which are known to be chemically hazardous and are a potential carcinogen.

Examples of the powdery optical filler [B] to be used include talc, calcium carbonate, diatomaceous earth, mica, kaolin, barium sulfate, magnesium carbonate, erosil, vermiculite,
Powders such as graphite, aluminium, hexachloride, and rubber may be used, and skin coloring agents such as titanium oxide and carbon black may also be used.

[B] Can the particle size of the optical filler be adjusted appropriately? Preferably, the particle size is 1 to 50#, and 50% or more of the particle size is Sfi or less. 4 is particularly preferred.

It is preferable to use these [B] light fillers for lids in a ratio of about 70 to about 250 μm per 100 μg of moisture-friendly acrylic thread resin, and the blending amount is 4×0. In the case of Mu Iibe F, problems such as swelling caused by baking and hardening are seen, which is not a good choice. Also, the blending amount is about 2
If it is less than so*ii@, in addition to the inconvenience that the dense layer property after water immersion decreases, the chipping property decreases significantly, and the
When exposed to impact from large flying stones at low temperatures, block-like peeling may occur, which is undesirable.

Conventionally, for chipping-resistant materials, especially water-based chipping-resistant materials, elastic coatings have been replaced with F base coatings, which have excellent rust prevention properties.
Or, the main focus is only on applying it to the finish coating and protecting it from chipping, and no consideration is given to the #3 protection of the chipping resistant material itself. , chipping resistance and excellent rust prevention properties of more than 1,500 hours in a test according to JIsZ23t1 (Hanasui spray test method). I was disappointed.

Rust prevention of the present invention - 1 chipping material? Yo, above (A)
In addition to the water-oil resin and the powder filler, it also contains CJ Island toxic anti-corrosion pigment as an essential component.

Traditionally, rust-preventing substances that have been widely used in oil-based paints and anti-corrosive base paints, such as red lead, lead oxide (resurge), lead powder, syncchromate, chromate/#lium, and strontium chromate, are toxic. Moreover, it is not preferable that the expected rust-preventive effect is manifested under the combined use with CA) moisture-friendly acrylic resin, and the result is that the VC of the present invention is not suitable for use with LN.
There is no uniform samurai.

In the present invention (,4) with water-dispersible acrylic m blood
The most effective preparation that can be seen at a glance is the rust-preventing effect of young rice grown on the 41st power, which can be compared to the FMLv14. The disadvantage of this invention is 1.
s1 Dobo Moe-ryo and Kai 1, Mukotsutsu Rust Prevention Application Department and Zel'tJ
For example, phosphate-based rust preventives such as zinc diphosphate, calcium phosphate, aluminum phosphate, titanium IJ heptate, silicon phosphate or ortho thereof, and condensed phosphorus salts; Zinc molybdate, calcium molybdate, molybdenum chloride zinc, molybdenum tII zinc potassium, phosphorous molybdenum aleJl
i9 potassium, phosphomolybdenum sapon calcium potassium, etc. #Sabashina; It's a monkey if you hold 4 meetings.

These [C, 1 non-toxic rust prevention and maintenance products] are mixed with 10 to 100 parts, preferably 30 to 70 parts by weight, per 10 ojlkA parts of the solid content of the water-dispersible resin [A]. [C]
Non-toxic rust-preventing pigment combination lid is less than 10 parts VC, can provide more than 1 light of rust prevention power, distribution @ wrinkles is 100
Excessive amount of VC beyond the shield feeding part is not preferable because the dense layer property after water immersion will deteriorate.

This v'J rigid chipping resistant material contains 1 usual defense agent, thickener, thickener, thixotropic agent, antifreeze agent, 1/lA
= 7 Ju of thread additives such as M agent can be added to the history.

As for the properties of the rust-proof and chipping-resistant material of the present invention, for example, the ratio is about 11 to about 1.5. p// is about 7 to about 9, unr
A good example is that the four components are about 60 degrees or more, and the viscosity when measured using a B-type viscosity needle is about 100 to about 300 degrees.

A method for maintaining the integrity of sheet metal parts using the rust-proof and chipping-resistant material of the present invention will be explained. Sheet metal processing department system means steel plate,
Plated copper plate and 11! iSteel plates etc.t.

Each piece was made into a 4IIfF3 shape using sheet metal braces, and Liu was welded to use it as a self-exciting warning member, such as a gasoline tank.
Even if it's a J-dress and a masturbation is applied after welding, it can be wiped. For example, a gasoline tank made of frosted plating plate can be used as a sheet metal member that can effectively maintain the strength of the sheet metal. Mounting *M side of the sheet metal parts outside the cabin of the front aegron, rear aegron, and γ.

Again 1” middle school 1! ! [Can be applied 4 times to 1 coat of paint and 4 coats of top coat Ifi.

The coating method used for application is a conventionally known method, and airless coating is common.

The thickness of the rust-proof and resistant chitsubinda material is preferably about 200 to about 800 (kron,
More preferably about 200 to about boo microns. It is preferable that the rolling film thickness is about 200 cm (less than 300 cm), so that the liquid intoxication is low, and 1<, father, about 80
0 (more than 100 ml of chlorine may cause VC swelling due to drying and drying, which is not preferable).

The anti-corrosion and chipping-resistant material of the present study can provide sufficient chipping resistance even with a dry film thickness of, for example, about 500 microns or more, but it is possible to achieve sufficient chipping resistance even with a dry film thickness of, for example, about 500 microns or less. 500 jchron or more is preferable.

#t1 The surface may be dried at room temperature or by baking, but it is preferably pre-sterilized at about 80"G4!! degrees and then dried at about 12 degrees to about 180 degrees C. It is best to heat it in a drying oven under certain conditions.

The number of compositions of the present invention is listed below along with comparative examples. !
I will now give a more detailed example. The properties of the samples obtained in the following examples were tested according to the following test method.

Secondary adhesion test after lateral water skin soaking α8X100X: 200 tide/- lead-tin alloy plated steel plate (product name Tan sheet) made by Nippon Steel Corporation (closed)
After cleaning each sample with an airless sprayer (
Compression ratio 30:1. -Next E#h/P? /) K is about α9 r
Using a tip tube with a diameter of n / tn, the trunk hardness a thickness is about 35
Apply it so that there is no dust on it, and then heat it for 20 minutes at 140℃.
I baked Ji to form a Chinobinda-resistant coating film, prepared a test root, and died. The prepared test tube was immersed in water at about 40℃ for 7 days, then pulled out and removed with gauze.
Wipe it off and hold it vertically in a room for 4 to 7 hours, then wipe off the moisture on the paint film with gauze and apply it to JIS-640.
06,15VC41 Insert a 1 m/m wide goblin and peel off the cellophane tape to check whether the coating film is attached or not.

Rust prevention test The co-worker seamlessly welded two sheets of retanto.

Class & J! i! After cleaning in an lfO warehouse/ner, each sample was coated on both sides using the same coating method as previous dI and 1LrJ to prepare test plates. The adjusted test plate is JIS-Z-23
The sample was simply subjected to brine atomization.

Chippinder Resistance Test According to the above secondary @layer test and colleague f, the coated surface of the prepared test plate was measured at a height of VC2m using a 40cm diameter salt pinot 9ig at an angle of 601W) (A(- 11) Drop # when the base material is rolled out by continuous rolling tl; Rating 1 with electric 1
Crooked trap. However, the film thickness is 300μ, 450μ, 1100μ
It was conducted at three levels.

Example 1 According to the formulation proportions shown in the upper part of Table 1 below, 1.
/C water-dispersible acrylic resin (ethyl acrylate/methyl methacrylate/acrylic acid, emulsification strength; secondary transition point -18°C; FH = 7.01, solid content approximately 5196 emulzoite), Add the dispersant and water, then add calcium carbonate and K-holinoids◆84 while stirring with a disper.
,car? hmm! The rack was gradually added and stirred sufficiently to give the rust-proof and chipping-resistant material 1 of the present invention.

Comparison & Example 1-4 According to the ratio of additives shown in the upper part of Table 1 below, VC in the container
Add the same water-dispersible acrylic resin, dispersant, and water as in Example 1, then stir with a disper (r.) Gradually add the powder and colorant and stir thoroughly to obtain a comparable example. Ti
A chipping-resistant material was obtained.

As a result of measuring the characteristics of the sample H shown in the example, the rust-proof and chipping-resistant material of Example Vt showed that it did not rust even after a long period of 1,600 hours of #I wiping. In addition, it has excellent secondary adhesion after being immersed in water.
In addition, it has the same level of chipping resistance that conventional chipping-resistant materials require a film thickness of about 1000μ to be achieved with a thin film of 200~SOO. It turned out to be Kurare's friend.

Claims (1)

[Claims] 1. (A) 100 parts by weight (solid content) of a water-dispersible acrylic resin having a secondary transition point of 0°C or less, [B] Approximately 70 parts by weight of a powdery filler.
~about 3150 parts by weight. 1. A non-organic solvent-based rust-preventive material comprising about 10 to about 100 S toxic rust-preventive pigments, and which is used for covering sheet metal parts on the exterior of wheels.