JP3185828B2 - Electrodeposition paint suitable for sliding parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, for imparting lubricating performance to sliding parts of automobile components (passive belt storage parts, door strikers, door glass guide rails, guide channels, etc.). The present invention relates to an electrodeposition paint suitable for a sliding portion.

[0002]

2. Description of the Related Art Conventionally, grease is often used in sliding parts of automobiles, and a solid lubricant such as molybdenum disulfide or a fluororesin-based paint is applied to a part (for example, doors). The structure of the striker, the guide rail for the door glass, and the guide channel are described in “Automotive Engineering Complete Book, Vol. 13, Passenger Car Body,” First Edition, April 20, 1980, Automotive Engineering Complete Book Editing Committee, pp. 125-
Page 142, "4.1 Door"
For the main lubricants and their uses, refer to “New Edition of Automotive Engineering Handbook <12th Edition”, published first edition May 31, 1983, Japan Society of Automotive Engineers, pages 1-85 to 1-85.
-86 "Table 1-113 Types and Uses of Main Lubricating Oils (Part 3. Grease JIS K 2220)", and in this table, general grease, rolling bearing grease, automotive chassis grease, Other than wheel bearing greases for automobiles and greases for centralized lubrication, greases for heavy loads mainly containing refined mineral oil, lithium soap, aluminum composite soap and a solid lubricant (molybdenum disulfide, etc.) are described. ).

[0003]

However, this type of grease may be scattered during use, and thus has disadvantages such as reduced lubrication performance and contamination. In addition, the use efficiency of the solid lubricant must be increased because of its high cost. However, the conventional method has been disadvantageous in that the application efficiency is low and the versatility is lacking because the application is performed by air spray. Furthermore, since the solid lubricant cannot be dispersed in the base resin and precipitates, there is a disadvantage that it is difficult to form an electrodeposition coating in the conventional case. Therefore, it was a problem to be able to eliminate these disadvantages.

[0004]

The present invention is an object of the invention, was made in view of the conventional problems described above, the solid lubricant in the basic tree in fat
It is suitable for sliding parts , which have good dispersion of the solid lubricant, good coating efficiency of high cost solid lubricant, can reduce the cost, and can exhibit good lubrication performance over a long period of time. It is intended to provide an electrodeposition paint.

[0005]

Electrodeposition paint suitable for sliding portion according to the present invention SUMMARY OF THE INVENTION, in electrodeposition coating, grinding the electrodeposition coating
It contains friction coefficient-reducing solid lubricant from 10 to 40 wt%
And silicone resin for preventing precipitation of solid lubricant
-13% by weight, which is a means for solving the above-mentioned conventional problems with the configuration of the invention relating to the electrodeposition paint suitable for such a sliding portion.

As the electrodeposition paint which is a base material of the electrodeposition paint suitable for the sliding portion according to the present invention, an anion type in which the resin of the paint has a negative charge in a coating booth, for example, linseed oil Maleic oil, or polyester, polybutadiene, etc. can be used. In the coating booth, the resin of the coating is of a cationic type having a positive charge, for example, a normal amino group (- N) having a basic property and being neutralized with an acid (for example, an organic acid) solubilized or dispersed in water, and a curing agent using a blocked isocyanate can be used. Further, it is possible to use a thick-film type cationic electrodeposition paint in which the electric resistance value of the coating film is reduced to increase the amount of electrodeposition so that a smooth coating film can be obtained even in a thick film, or A typical cationic electrodeposition coating requires high-temperature baking to cure the epoxy resin, and for this reason the baking temperature is 170 to 180 ° C., but the curing mechanism was changed to cure in a low temperature range. Electrodeposition paints can also be used. And
When the object to be coated (such as a sliding member) is thick, it is sometimes desirable to use the above-described low-temperature baking type electrodeposition paint.

[0007] The electrodeposition coating material suitable for the sliding portion according to the present invention is such an electrodeposition coating material serving as a base material, which contains 7 to 13% by weight of a silicone resin and contains a solid such as molybdenum disulfide or tungsten disulfide. It is assumed that the lubricant is contained in an amount of 10 to 40% by weight. In this case, if the content of the silicone resin is less than 7% by weight, the solid lubricant will precipitate in the base electrodeposition coating material. If the content is more than 13% by weight, the surface energy becomes low, and the appearance of the coating film such as repelling tends to be unfavorably increased.

If the content of the solid lubricant is less than 10% by weight, the lubricating property tends to be insufficient, so that it is not preferable. If the content is more than 40% by weight, the solid lubricant is contained in the base material. It is not preferable because it tends to precipitate in the electrodeposition paint.

[0009]

Electrodeposition paint suitable for sliding portion according to the present invention the action of the Invention, since a material having the above configuration, sheet
Solid Jun in the electrodeposition paint q.s. containing recone resin
Prevention of lubricant precipitation and better dispersion
Therefore, it is easy to convert paint containing solid lubricant to electrodeposition paint.
After the electrodeposition coating, a sliding surface having excellent lubrication performance equivalent to that of a solid lubricant can be obtained, and such excellent lubrication performance can be maintained for a long period of time.

[0010]

EXAMPLE 1 A test piece (70.times.150.times.0.8 mm) made of a steel sheet was treated with a chlorine phosphate-based chemical conversion coating agent (trade name: Granodine SD5).
000 Nippon Paint Co., Ltd.)
Cationic electrodeposition paint (trade name; Power Top U-10)
0 Nippon Paint Co., Ltd.)
Electrodeposition coating with a dry film thickness of 20 μm using an electrodeposition coating suitable for sliding parts prepared by adding 7% by weight of silicone resin and 10% by weight of molybdenum disulfide as a solid lubricant,
By heating and baking at 75 ° C. for 20 minutes, a test piece having an electrodeposition coating film formed on the surface was obtained.

Example 2 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 1 except that the addition amount of the silicone resin was changed to 10% by weight.

Example 3 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 1 except that the addition amount of the silicone resin was changed to 12% by weight.

Example 4 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 1 except that the addition amount of the silicone resin was changed to 13% by weight.

Example 5 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 1 except that the addition amount of molybdenum disulfide was 25% by weight.

Example 6 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 1 except that the addition amount of molybdenum disulfide was changed to 40% by weight.

Example 7 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 2 except that the addition amount of molybdenum disulfide was 25% by weight.

Example 8 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 2 except that the addition amount of molybdenum disulfide was changed to 40% by weight.

Example 9 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 3 except that the addition amount of molybdenum disulfide was 25% by weight.

Example 10 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 3 except that the addition amount of molybdenum disulfide was changed to 40% by weight.

Comparative Example 1 In Example 1, the addition amount of the silicone resin was 6% by weight.
A test piece having an electrodeposition coating film formed on the surface was obtained in the same manner as in Example 1 except that

Comparative Example 2 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 1 except that the amount of molybdenum disulfide was changed to 9% by weight.

Comparative Example 3 A test piece having an electrodeposited coating film on the surface was obtained in the same manner as in Example 1 except that the addition amount of molybdenum disulfide was 41% by weight.

Evaluation Examples The test pieces obtained in Examples 1 to 10 and Comparative Examples 1 to 3 were evaluated for lubricity and the appearance of the electrodeposition coating film.

In evaluating the lubricity, the coefficient of friction of the coating film surface was determined by a Howden test (target value:
0.01 or less).

In evaluating the appearance of the coating, JI
According to SK5400 Paint General Test Method 6.1,
As a visual evaluation, the results were classified into ：: good, Δ: normal, ×: poor. Table 1 shows the results.

[0026]

[Table 1]

As is clear from the results shown in Table 1, in Examples 1 to 10 of the present invention, the friction coefficient was reduced to the target value of 0.01 or less , and the lubrication was excellent. And the appearance of the coating film was also good.

On the other hand, in Comparative Examples 1 to 3, the lubricity was poor and the appearance of the coating film was poor.

[0029]

According to the present invention, the electrodeposition coating composition suitable for the sliding portion is a solid coating composition containing 10 to 40% by weight of a solid lubricant for reducing the friction coefficient of the electrodeposition coating film .
Contains 7 to 13% by weight of silicone resin for preventing precipitation of lubricant
Since it is a thing that rarely, silicone resin
Precipitation of solid lubricant in electrodeposition paint by proper content of
Can be prevented and their dispersion improved.
Of solid lubricants into electrodeposition coatings
It is possible to obtain a lubricated surface with excellent lubricating performance after improving the coating efficiency of the solid lubricant , which is expensive, and reducing the cost. A remarkably excellent effect that good lubrication performance can be maintained in the member for a long time is obtained.

Continuation of the front page (56) References JP-A-63-182378 (JP, A) JP-A-4-18456 (JP, A) JP-A-55-157664 (JP, A) JP-A-56-72058 (JP, A) JP-A-57-65765 (JP, A) JP-A-4-159376 (JP, A) JP-A-4-20575 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB (Name) C09D 5/44

Claims (2)

(57) [Claims] 1. A electrodeposition coating, the friction coefficient of the electrodeposition coating
Co When lowering the solid lubricant is 10 to 40 wt%
And 7 to 13 silicone resins for preventing precipitation of solid lubricant.
An electrodeposition paint suitable for sliding parts, characterized in that it is contained by weight . 2. The electrodeposition coating composition according to claim 1, wherein the solid lubricant is molybdenum disulfide.