JPS5830343B2 - abrasion resistant paint - Google Patents

Description

Detailed Description of the Invention The present invention relates to heat-resistant and meltable polytetrafluoroethylene resin (hereinafter referred to as P) having a perfluoroalkoxy group.
(hereinafter referred to as F, A), or P, F, A mixed with polytetrafluoroethylene resin (hereinafter referred to as P, T, F, E), solid lubricant, heat resistance and adhesion. Mix a thermosetting resin with
Concerning abrasion-resistant coatings around sliding surfaces of metals or ceramics and generally solids.

The sliding surfaces of solid sliding parts are required to have low friction loss and low wear.

For this reason, various lubricating materials have conventionally been used.

These lubricating materials can be broadly classified as follows.

(1) (a) Crude oil refined from petroleum crude oil, sierre oil, and low-temperature dry-distilled tar of coal (b) Fatty oils such as animal or vegetable oils (e)
Mixed oil such as grease as a synthetic oil of the above (a) and (b) (2) Silicone oil for low temperature use, fluorine oxide with good heat resistance and chemical resistance (3J MoS2, graphite, metal oxides, etc.) in water or Solid lubricant dispersed in oil or grease (4) Surface hardening treatment by plating, thermal spraying, vapor deposition, etc. (5)
Plastic products (6) Plastic coatings The above classifications will be briefly explained.

(1) has disadvantages in corrosion resistance, heat resistance, and cold resistance, and also causes seizure, making it difficult to maintain a constant sliding surface.

The silicone oil (2) is oily, and the fluorine oil has poor viscosity characteristics.

(Although 37 has good heat resistance, it turns into powder at high temperatures and scatters.

All of (1), (2), and (3) cause significant environmental pollution on the sliding surface.

Although the abrasion resistance of the part treated in (4) improves, the mating material often wears out and scratches occur (and the fitting accuracy tends to deteriorate, and this treatment alone causes high frictional resistance). 1)
Or, combination of (2) is required.

Method (5) has been widely adopted for general-purpose parts, but
Compared to metal, it has inferior mechanical strength and dimensional stability, and has poor heat dissipation, so it cannot be used as highly precise mechanical parts or in harsh environments.

Since method (6) processes the surface of metals, ceramics, and generally solids, it has high reliability in mechanical strength and dimensional stability (and, in addition, heat dissipation is much better than (5)). Only a small amount of processing material is required.

In particular, (1), (2), (3), and (4) all require a lubricating mechanism, which is difficult to maintain and manage, and the lubricant used may scatter, causing environmental pollution.
In other words, contamination of various parts of the equipment and further pollution problems occur.

Furthermore, as mentioned above, (5) has drawbacks in mechanical strength and dimensional accuracy.

However, since method (6) uses oil-free lubrication, the above-mentioned problems do not occur, and mechanical strength and dimensional accuracy can be maintained, so it has been studied for various materials, and P, T, F
, E, has been considered to be the best.

However, the P, T, F, and E paints had disadvantages such as poor workability, poor mechanical strength, easy formation of pores and scratches, and low abrasion resistance.

The present invention considers the combination of (3J and (6)) above, and disperses a solid lubricant in a thermosetting resin with good adhesion, and adds P, F, A, or P as a coating film forming material to this. F, A, niP
, T, F, and E, it is a heat-resistant and low-wear coating around the sliding surface.

The structural formulas of P, T, F, and E are It is indicated by.

However, C is carbon, F is fluorine, and n is the number.

Those in which a perfluoroalkoxy group is bonded to one of the main chains are P, F, and A, and are represented by the structure.

However, Rf is a fluoroalkyl group, and 0-Rf is a perfluoroalkoxy group.

P, F, and A are called P, T, F, and E, which can be melt-processed and are non-adhesive, with a melting point of 302°C to 310°C and a tensile strength of 238 kg/crrx at 100°C. Moreover, it is known as a known technique that it does not change at a continuous use temperature of 260°C.

Also P, F, A. It is a well-known technology that it is chemically stable, almost unaltered by ordinary acids, alkalis, oxidized ring-forming agents, halogens and solvents, and has excellent heat resistance.

However, since P, F, and A are non-adhesive as described above, they have the disadvantage of poor adhesion to objects to be coated.

In order to eliminate the above-mentioned drawbacks, the present invention mixes a thermosetting resin with poor abrasion resistance but excellent adhesion, and further disperses a solid lubricant in the thermosetting resin in advance. By applying the mixed paint obtained by and baking to obtain a baked coating film, P, F, A, which has a low coefficient of friction and excellent heat resistance and chemical resistance, as well as solid lubricant with built-in dispersion. The adhesive is brought into close contact with the object to be coated using the three-dimensional structure of thermosetting resin with good adhesive properties.

That is, since the coating film of the present invention is mixed with a thermosetting resin, it is somewhat inferior to P, F, A, and P, T, which have the drawbacks of poor mechanical strength and being easily scratched. F,
Compared to E and other lubricants, its wear resistance is significantly improved, and it also has the advantageous and important feature of not causing scratches or damage to the mating sliding surface. It has good sexual characteristics.

To form a coating film, (1) P, F, and A are dissolved or dispersed in an organic dispersant or water.

(2) Dissolving or dispersing only the thermosetting resin solution or powder or the solid lubricant powder in another organic dispersant or water.

A coating film raw material can be obtained by mixing (1) and (2) in an appropriate ratio.

When P, F, A, the thermosetting resin, and the solid lubricant are all powders, a mixture is obtained by the triblend method and used as a raw material for the coating film.

Any of the stirring mixing method, tumbler mixing method, shaking mixing method, ultrasonic mixing method, ball mill mixing method, and roller mill mixing method may be used for mixing, but the particle shape of P, F, and A may be damaged. Make sure not to.

The solvent and dispersant to be used are mainly determined by the type of thermosetting resin, but the final decision is made based on dispersibility, coating properties, and film-forming ability.

As long as the object to be painted does not deteriorate near the baking temperature, it can be painted regardless of its shape or size, as long as it is solid such as various metals, glass, ceramics including ceramics, and heat-resistant plastics.

However, the surface of the material to be painted must be thoroughly cleaned before painting.

Cleaning is performed by dipping, showering, bubbling, ultrasonic cleaning, and other general cleaning methods using solvents, acids, alkalis, and detergents.

After that, the following treatment may be performed to further improve the adhesion between the coating film and the object to be coated.

That is, sandblasting, shotblasting, gridblasting, honing, paper scratching, wire scratching, hairline treatment, thermal spraying of metal or ceramics, alumite treatment, bee mast treatment, crack plating treatment, chemical etching, and chemical conversion coating treatment are added.

There are two main types of coating methods:

When dissolved or dispersed, coating methods include brush coating, dipping, air spraying, electrostatic spraying, spatula coating, roller coating, curtain coating, spin cord using centrifugal force, electrophoresis coating, and P, F , A, and a thermosetting resin and a solid lubricant, respectively, by powder spraying, electrostatic spraying, fluidized dipping, electrostatic dynamic dipping,
The coating method is Provac and pressure molding.

After painting as above and drying, it becomes P, F, A.

and the solid content of thermosetting resin and solid lubricant.

At this stage, additional coatings may be applied to obtain the required film thickness.

The present invention has a feature that it is possible to form a coating film of up to 150 μm in one coat.

The drying temperature is determined by the type of solvent, but in the case of powder coating, baking treatment can be performed immediately after coating.

The baking temperature is close to the melting point of P, F, A, within 320℃ to 38℃.
A temperature of 0°C is suitable; if the temperature is higher than this, the abrasion resistance will decrease.

After baking, let it cool and use it as is, or polish it,
Cutting and pressing are performed to achieve the specified dimensional accuracy and surface roughness.

The abrasion resistance test was carried out using the Matsubara type abrasion test method, and the slide abrasion coefficient without oil was measured under the following conditions.

The test piece was a 40 mm x 40 im x 2 mm aluminum plate, with a load of -10 kgycrA and a sliding speed of -3.
Under the condition of 0m/win, the mating material is stainless steel SUS
304, the surface of the test piece was degreased with trichlorethylene, and various types of coating films were formed on the surface.

The numerical values in the drawings below are the abrasion resistance coefficients determined by the above abrasion resistance test.

Under the above sliding conditions, the conventional wear coefficient was lOO x 100-1
If it is less than OcrlA・m, it can be used as a sliding material, and the wear coefficient of the organic polymer sliding materials currently on the market is 100 x 10-10 cnv', which is often around 9-m. Even in the case of the plastic coating mentioned in (6) above, which is said to be 40 to 70 x 1
There are only 0-10i/kg and m.

The coating film of the present invention is IX 10XI 0-10cr/l/k
It shows good results for g-m.

There are currently more than a dozen types of thermosetting resins, but all of them are heat resistant, have a three-dimensional network structure, and are permanently infusible after curing.
It has the property of being insoluble, and because of its structure, it has adhesive properties and is used as a paint and paint base material.

Polyamideimide resin (hereinafter referred to as P, A, I)
, polyimide resin (hereinafter referred to as P, 1.), epoxy resin, urethane resin, and silicone resin are all thermosetting resins, and each has its own characteristics.

P, A, 1. The structural formula is represented by, where R is an alkyl group.It is a resin with a structure in which an amide bond and an imide bond are crossed.It has flexibility as it has an amide bond with moderate hygroscopicity, and is an electrical insulator. Used as a single material.

The structural formula of P and I is expressed by, and it has been developed in recent years and has a softening point of 700°C.
The weight loss due to thermal decomposition is very small, less than 1.5% even in helium at 400°C for 15 hours continuously, and it is used as an electrical material.

Epoxy resin is a chain condensate having two or more ethylene oxide bonds (OH-CH2), that is, epoxy groups\10** in the molecule, and resins that are cured with amines, anhydrides, etc., and are widely used. Used as an adhesive or paint
Good adhesion.

Its structural formula is It is represented by R1 and R2 are substituents.

In addition to this You can also use.

R is Hl CH3 etc.

* * The urethane resin is preferably a one-component thermosetting type using blocked isocyanate, and its structural formula is shown as an example.

It has the highest adhesive strength and good water resistance, so it is used as a paint, but its weather resistance is poor.

Silicone resins used are SiO2 and CH35i
n3/! , (CH3) 2S io, (CH3) 3S
Methyl silicone varnish which is a copolymer of the structural unit of i03A, or whose structural unit is CH35iO3/2, (C
H3) 2 S i O, C6H5S io3/2, (
C6H5) (CH3) 5iO1(C,H5)2Si
Also used are phenylmethyl silicone varnishes, which are O, and alkyd, phenol, melamine, epoxy, polyester, acrylic, and urethane-modified silicone varnishes thereof.

It is heat resistant, cold resistant, oil resistant, and water repellent, and is used as an electrical insulation material.

Solid lubricants include, in addition to those mentioned above (3J), mineral substances called pigments, and lake pigments in which organic substances are combined with metals, and are generally used in powder form, but except for specific uses, they have traditionally been dispersed in powder form. However, it has the disadvantage of causing environmental pollution.

P, T, F, and E have been used as base materials for sliding surface coatings because they have excellent sliding properties.As mentioned above, P, T, F, and E
The coating film of , is prone to generate pores and scratches, and therefore has poor mechanical strength, resulting in poor film formation, unstable coating performance, and poor abrasion resistance.

However, since P, F, and A mix well, P, F, and A
By adding the meltability of , to P, T, F, and E, a coating with characteristics as a wear-resistant coating around the sliding surface can be obtained.

An actual measurement example is shown below.

Figure 1 shows 75% by weight of P, F, and A with an average particle size of 35 μn.
,P,A,1. 25% by weight of solids (however, this P, A, 1
．． M in solid content.

It is a diagram of a micrograph of a coating film mixed with S2 (P, A, I, containing 5% by weight of the simple substance).

A is a cross-sectional view, and the shaded area is the material to be coated.

b is a plan view of the surface of the coating film. All are in the state before baking.

a' is the state of a, and b' is the state of b after baking. Before baking, the white circle 1 is, and after baking, the continuous white part 1' is P, F, A.
.

The black part before baking 2 and after baking 2' is M.

These are P, A, and I containing S2.

2' indicates that P, A, and I are in close contact with the surface 3' of the material to be coated at a'.

The abrasion resistance test used precious wood and a Matsubara type abrasion tester, and the thrust abrasion was measured without lubrication to obtain the abrasion coefficient.

As test specimens, aluminum plates measuring 40 m x 40 mm x 2 were degreased with trichlorethylene, and various coating films described below were formed thereon and used.

The test conditions were: (1) load was 1 kg/ci, (2) sliding speed was 30 m/M (3J mating material was SUS'304).
It is made of stainless steel.

Test under the above conditions until the metal surface is exposed, and calculate the wear coefficient (c11t/kg0m) from the steady wear amount when exposed.1. f, -8 Figure 2 shows spherical P, F with an average particle size of 35 μm.
:A,) to P, A, 1. Solid content (However, this includes P,
A.1. The wear coefficient (X 1
0-10 cril/kg, m) is shown on the vertical axis.

The broken line A indicated by -×- is the case when no solid lubricant is added, that is, P, A, 1. Indicates the case of only

The fold line where red iron oxide (ferric oxide) is added is shown as 1, the line where carbon is added is shown as -△-, and the line where graphite is added is shown as -.
The values obtained by adding oS2 are shown by the broken lines ``10-'' and ``e''.

From these polyline groups, P, A, and I in any case.

It can be seen that addition of around 25% by weight gives the smallest abrasion coefficient, that is, the best abrasion resistance.

In addition, the value of 25% by weight of the broken line A without solid lubricant is approximately 45 X l O-10cal/kg, m, whereas the value with solid lubricant added is approximately 2 to 18 times more resistant to wear. It can be seen that the coating properties are good and are nearly 100 times better than general coating materials.

The one with the best abrasion resistance is M with the broken line E indicated by 10-.
.

2.5 x 10-10crtl/k with S2 addition
The value of g −m is obtained.

The amount of MoS2 added was 1.05% by weight of P and A.

Figure 3 shows MoS2 P, A, 1 in other thermosetting resins.
．． The graph shows the relationship between the weight percent of the thermosetting resin added and the wear coefficient when the thermosetting resin is contained at 5 weight percent as in the case of .

In the figure, the fold line C indicated by -△- is phenyl methyl silicone resin, the fold line A indicated by -〇- is a mixed resin of epoxy resin and melamine resin, and the fold line opening indicated by - is urethane resin.
The second broken line indicated by -mu is when the urethane resin is added to P, F, and A.

Of these four fold lines, except for fold line 2, phenyl, methyl,
Silicone resins, mixed resins of epoxy resins and melamine resins, and those to which urethane resins are added have the characteristic of exhibiting a low coefficient of wear over a wide range of additives.

Also, regarding the broken line C in Fig. 2, P, A, I, and P, F, A for the case where the solid content is 25% by weight.

Figure 4 shows the relationship between the average particle size and the wear coefficient.

FIG. 4 shows that the smaller the average particle diameter, the lower the wear coefficient.

Figure 5 shows P, A, 1. P, A, 1. containing 5% by weight of elemental carbon. The solid content is 25% by weight of the total amount, and the remaining 7
When 5% by weight is P, F, A and P, T, F, E, the relationship between the amount of P, T, F, E added to P, F, A, and the wear coefficient was determined. It is something.

From Figure 5, P, T, F, up to 70% by weight of P, F, A,
E.

It was found that the wear coefficient did not change much even if the
If no special mechanical strength is required from now on, P,
It is shown that it can be used even if T, F, E, is substituted up to 70% by weight of P, F, A.

If it exceeds 70% by weight, the abrasion resistance decreases rapidly.

The same applies to other solid lubricants.

In Figure 6, instead of carbon in Figure 5, 5% by weight of MoS2 is added to each thermosetting resin to make 25% by weight, and the remaining 75% by weight is P, F, A, and P
, T, F, E, P, F, A, P, T, F, E, abrasion coefficient when changing the mixed weight percentage of powder and P, F, A, , T, F, E, and the relationship with the mixing weight %.

The broken line A indicated by -〇- is P, 1. The fold line indicated by -・- is a mixed resin of epoxy resin and melamine resin, the fold line indicated by -×-/\ is urethane resin, and the second fold line indicated by -△- is a thermosetting resin of phenylmethyl silicone resin. This is the case.

From Figure 6, P, 1. 70% by weight for urethane resin, 60% by weight for phenyl methyl silicone resin, 80% by weight or more for mixed resin of epoxy resin and melamine resin, P, F, A, P, T, F, E.

It can be seen that the addition of 20% reduces the abrasion resistance.

Next, Examples 1 to 11 will be specifically described.

Example 1 Spherical P, F, A with an average particle size of 35 μm were dispersed in a mixture of dimethyl formamide and tolten, and then commercially available P, A, 1. M in varnish.

S2 as P, A, 1. The above p, F, and A were added in a single unit so as to have a concentration of 5% by weight, and kneaded in a ball mill.

It was added to the dispersion liquid and stirred and mixed.

At this time, P, A, 1. The mixed solid content of and MoS2 is P, F, and A.

The amount was adjusted to 25% by weight.

Close one end of the 5PHC video desk condensing lens holder (inner diameter 11 mm, length 10 mm) and pour the paint from the other end. When the holder is filled with the paint, let it flow out from the bottom of the holder. After painting the inner surface, 80℃
Dry at ~150°C for 25 minutes, then at 330°C for 30 minutes.
I baked it for a minute.

When this inner surface was further machined to leave a 30 μm film and used for use, the product showed no stick-slip phenomenon and smooth sliding was obtained, resulting in improved wear resistance and a 500 μm coating.
It is working well even after 0 hours of use.

Example 2 P, F, A, and resin powders with an average particle size of 70 μm were compared to P, 1. The powders were mixed at 25% by weight.

This P, 1. Powder is prepared in advance by 5 for P, I, and simple substance.
% carbon by weight.

This mixed powder was heated to 350°C, and
Powder spraying was applied to the iron plate of Oho X31ixm, and 35
Baking was carried out at 0° C. for 30 minutes to obtain a film of about 150 μm.

When this board was used for sliding movement with the glass fiber reinforced nylon running belt of a room running device for rehabilitation, it achieved smoother sliding properties than conventional hard chrome plated boards, thus doubling the lifespan and improving the paint film. Abrasion resistance was also good.

Example 3 P, F, A, resin powders with an average particle size of 20μ were added to a dispersion of a mixed solvent of pheasant roll and butanol, and added to a mixed solution of an epoxy resin and a melamine resin to determine the solid content ratio. A mixed paint containing 75% by weight of P, F, and A to 25% by weight of epoxy resin and melamine resin was prepared.

Note that this mixed solution of epoxy resin and melamine resin is preliminarily mixed with M in an amount of 5% by weight based on the solid content of this mixed solution.

S2 is mixed in. The mixed paint was brushed onto an aluminum household gas cock closer, and after drying at 80°C,
Baking treatment was performed at 350° C. for 30 minutes to obtain a film with a thickness of about 70 μm.

This was cut with a cutting tool to form a film with a thickness of 40 μm, which was used without lubrication and was opened and closed more than 20,000 times, but no gas leaked and good sliding properties were obtained.

Example 4 P, F, A powders with an average particle size of 20 μm were added and mixed into a mixed baking paint of epoxy resin and urea resin.
70% by weight of F and A, 30% of the mixed baking paint
Paints were made in the proportions of % by weight.

In addition, the solid content of mixed baking paint of epoxy resin and urea resin is 5
M in weight %.

S2 is mixed in advance. This P, F, A, and mixed paint of epoxy resin, urea resin, and MoS2 were treated with Joke Plast.
Spray paint the 5-piece ceramic plunger, and
After drying to the touch at .degree. C., baking treatment was performed at 350.degree. C. for 20 minutes to obtain a film with a thickness of about 50 .mu.m.

This was polished to a thickness of 30 to 40 μm by centerless polishing and used as a pusher for controlling chemical liquids, and as a result, satisfactory results were obtained in terms of chemical resistance, slipperiness, and sealability.

Example 5 P, F, A, and resins with an average particle size of 20 μm were added to a xylene solution of a commercially available thermosetting urethane paint, moistened with a nonionic surfactant, and stirred and mixed to form a viscous paint. create.

In this viscous paint, 15% by weight of the solid content of P, F, A, and resin is the solid content of urethane resin.

Further, the urethane paint (2) was mixed with MoS2 in an amount of 5% by weight of the solid content of the urethane paint.

This mixed viscous paint was applied to the outer circumferential surface of an iron piston with a diameter of 46 nm and a length of 18 U using a spatula while the piston was not rotating. After drying at 80°C for 10 minutes, the mixture was heated to 330°C.
Baking was carried out for 15 minutes in a vacuum cleaner to obtain a baked film with a thickness of 130 μm.

After this baking treatment, the material was cut to a thickness of 50 μm using a cutting tool and used as a compressor piston for a septic tank. Compared to conventional piston rings, the performance was improved by more than three times, and it was possible to make it lighter and more compact. Ta.

Example 6 P, F, A, resin powder with an average particle size of 20 μm was mixed with phenyl.
Add and mix into a xylene solution of methyl silicone resin, and add 70% by weight of P, F, and A based on the solid content of the silicone resin.
, created a resin.

Note that this phenyl methyl silicone resin contains M with a solid content of 5% by weight.

S2 is mixed in advance. This mixed paint was spray-painted on a steel clutch part for a motorcycle to obtain a baked film with a thickness of 45 μm.

This was dried at 80°C for 10 minutes and then baked at 330°C for 15 minutes.

This clutch component slides smoothly without the use of grease, has good corrosion resistance, and compared to conventional lubrication systems, clutch operation is smoother without lubrication.

Example 7 P, F, A powder with an average particle size of 20 μm and an average particle size of 10 μm
Commercially available dispersions of P, T, F, E, and powders of m or less are dispersed in a mixture of toluene and normal methyl pyrrolidone at a weight ratio of 3 nia.

P, F, A, resin and P, T, F, E
・,'25% by weight of P based on the solid content of the resin mixed powder,
A, I, the solid content of the resin was adjusted.

Note that P, A, 1. The normal methyl pyrrolidone mixture for varnish contains P, A, 1. 5% by weight of solid content of MoS2
is pre-mixed.

This prepared paint was sprayed with a spray gun with a nozzle diameter of 1.2 mm at a blowing pressure of 2 kg/cyif onto an ADC-12 refrigerator compressor piston with a diameter of 30 m and a length of 80 plates, which had been treated with aluminum oxide particles. A baked film with a thickness of 90 μm was obtained by painting.

Drying was performed at 150°C for 10 minutes, and baking was performed at 350°C for 30 minutes.

The coating is 40μm thick when cutting with a cutting tool, and it is quiet even when used completely without oil, making it possible to be smaller, lighter, and lower in cost than the conventional oil-lubricated type that uses piston rings. It has significant advantages and effects, such as eliminating the need for maintenance.

Example 8 P, F, A, resin with average particle size of 70 μm, 50.10 μm
A mixed powder is prepared in the following proportions by weight of P, T, F, E, resin 50.5 Qltm or less, P, I, and resin 30.

The P, I, and resins were premixed with 5% by weight of MoS2 based on their solid content.

This mixed powder was powder spray coated on the supporting metal of the handrail rubber belt of a stainless steel escalator heated to 350°C, and then baked at 350°C for 40 minutes to a thickness of 70 to 100 μm.
A film of m was formed.

When these support fittings were connected in series and used as a support for an escalator handrail belt, good results were obtained, with no belt slippage and a significant reduction in frictional noise.

Example 9 An epoxy resin and a urea resin were mixed in a xylene dispersion containing P, F'', A, resin with an average particle size of 20 μm and P, T, F, E, resin with an average particle size of 10 μm or less in a weight ratio of 5:5. By adding and mixing the mixed baking paint, P, F, A, resin and P, T,
F, E, carbon with a solid content of epoxy resin and urea resin of 5% by weight, adjusted so that the solid content of the mixed resin of epoxy resin and urea resin is 35% by weight based on the total solid content of the resin. It is mixed in advance into a mixture of epoxy resin and urea resin.

This adjusted mixed paint was spray-coated on a steel gear shift part with a diameter of 35 mm and a length of 140 mm.
After drying for 40 minutes at 350℃, the thickness is approximately 40μ.
A film of m was obtained.

As a result of using this part, the impact noise generated during gear operation was significantly reduced, and smooth gear operation was ensured without lubrication.

Example 10 A thermosetting urethane paint was added to a xylene dispersion containing P, F, A, resin with an average particle size of 20 μm and P, T, F, E with a weight ratio of 10 μm or less in a weight ratio of 4=6. , P
, F, A, resin and P, T, F, E, A paint was prepared in which the solid content of the urethane resin was adjusted to 30% by weight based on the total solid content of the resin.

The urethane resin contains 5% M by weight of its solid content.

S2 is mixed in advance.

A steel escalator side wall panel measuring 250 mm wide x 500 mm long was shot blasted, then flame sprayed with nickel and aluminum mixed metal powder, and the paint was spray-painted thereon.

For drying, infrared drying was performed at 80°C for 10 minutes, followed by baking at 320°C for 30 minutes to obtain a film with a thickness of 50 μm.

When panels coated with this coating are installed in a row on the side wall of an escalator, they have good sliding properties and are highly abrasion resistant, with almost no scratches being observed.

It is also possible to prevent foot-injury accidents that occur when using conventional metal plates, which is extremely important.

Example 11 P, F, A, resin with an average particle size of 20 μm, 30% by weight, P, T, F, E, resin with an average particle size of 10μ771 or less, 70% by weight
Disperse the mixed powder in a xylene solution, add and mix a commercially available epoxy-modified silicone resin to this dispersion,
P, F, A, resin and P, T, F, E, total solid content of resin 7
A paint was prepared in which the solid content of the epoxy resin-modified silicone resin was 30% by weight, instead of 0% by weight.

Note that this epoxy resin-modified silicone resin contains 5% by weight of M.

S2 is mixed in advance.

This paint was dip-coated onto a steel computer printer roll measuring 80 mm in diameter and 115 mm in length, dried at 80° C. for 10 minutes, and then baked at 320° C. for 20 minutes to obtain a coating film of about 60 μm.

This coating film was used for centerless polishing to a thickness of 40 to 50 μm.

The abrasion resistance was significantly improved compared to the conventional case of using only P, T, F, E, and resin without mixing P, F, A, and resin.

As described above, the present invention adds a thermosetting resin in which a solid lubricant is dispersed to P, F, and A, which have excellent heat resistance, non-adhesiveness, and solubility. We provide abrasion-resistant paint around sliding surfaces that adheres closely to the material to be coated through baking processing due to its adhesion properties, has heat resistance, and has low abrasion properties that do not cause scratches or damage to mating sliding surfaces. Furthermore, P, T, F, and E are superior in sliding properties to P, F, and A, but are prone to pores and scratches and have inferior mechanical strength.
.

By adding P, F, and A, the solubility of P, F, and A compensates for the above drawbacks, and by adding a thermosetting resin in which a solid lubricant is dispersed in the same way as above, the sliding property is improved. Heat resistance, with
The present invention provides a coating material with low abrasion properties and abrasion resistance around the sliding surface.

[Brief explanation of drawings]

Figure 1 is a micrograph diagram of the coating film before and after baking, Figure 2 is the abrasion coefficient and P, A, I, solid content weight %, Figure 3 is the abrasion coefficient and thermosetting resin weight %, and Figure 4 is is the wear coefficient and P, F, A
, average particle diameter (μm), Figure 5 shows wear coefficient and P, T, F,
E, solid content weight % (however, carbon); FIG. 6 shows the wear coefficient and P, T, F, E, solid content weight % (however, M. S2). 1.1'...P, F, A, powder, 2,2', γ...thermosetting resin, 3,3'
...Slip surface.

Claims (1)

[Scope of Claims] 1. A sliding surface abrasion-resistant coating comprising a polytetrafluoroethylene resin having a perfluoroalkoxy group, a solid lubricant, and a thermosetting resin. 2. The abrasion-resistant paint according to claim 1, which uses polyamideimide resin as the thermosetting resin. 3. The abrasion-resistant paint according to claim 1, which uses polyimide resin as the thermosetting resin. 4. The abrasion-resistant paint according to claim 1, which uses an epoxy resin as the thermosetting resin. 5. The abrasion-resistant paint according to claim 1, which uses urethane resin as the thermosetting resin. 6. The abrasion-resistant paint according to claim 1, which uses a silicone resin as the thermosetting resin. 7. A sliding surface abrasion-resistant coating comprising a polytetrafluoroethylene resin having a perfluoroalkoxy group, a polytetrafluoroethylene resin, a solid lubricant, and a thermosetting resin. 8. The abrasion-resistant paint according to claim 7, which uses polyamideimide resin as the thermosetting resin. 9. The abrasion-resistant paint according to claim 1, which uses polyimide resin as the thermosetting resin. 10. The abrasion-resistant paint according to claim 7, which uses an epoxy resin as the thermosetting paint. 11. The abrasion-resistant paint according to claim 7, which uses a urethane resin as the thermosetting paint. 12. The abrasion-resistant paint according to claim 7, which uses a silicone resin as the thermosetting resin.