JPH08234764A - Squeaking sound preventive surface treating agent - Google Patents

Abstract

PURPOSE: To prevent the squeaking sound which is generated in the contact parts on the surfaces of the interior parts of automobiles by adding urethane particles which are spherical and/or massive and have an average grain size within a specific range to a resin for an acryl-vinyl chloride based coating material in a range of specific weight %. CONSTITUTION: This surface treating agent is prepd. by incorporating the spherical and/or massive urethane particles having the average grain size within the range of 1 to 50μm in the range of 2 to 60wt.% as solid content into the resin for the acryl- vinyl chloride based coating material. The average grain size of the urethane particles is preferably in the range of 1 to 50μm and more particularly preferably in the range of 5 to 30μm. The urethane particles settle in coating films and ruggedness is no longer formed on the surfaces if the average grain size is below 1μm. The loss of a matte effect and the degradation in friction characteristic are resulted. The thickness of the surface treating agent is about 30μm and, therefore, the degradation in the wear resistance is resulted if, conversely, the average grain size exceeds 50μm. The shape of the urethane particles is particularly truly spherical and the content of the urethane particles is more particularly preferably in the range of 10 to 60wt.% as solid content.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeaking noise preventing surface treatment agent used for automobile interior parts such as instrument panels, door trims and sun visors, and in particular, the interior parts are rubbed against each other due to vibration during running of the car. The present invention relates to a squeaking noise preventing surface treatment agent for preventing squeaking noise generated.

[0002]

2. Description of the Related Art Conventionally, the surfaces of automobile interior parts such as instrument panels, pillar garnishes, door trims and sun visors are covered with a skin material such as vinyl chloride (PVC), and the surface layer thereof is also weather-resistant. The surface treatment is performed by applying an acrylic-vinyl chloride paint or a urethane paint in a thickness range of 10 to 30 μm for the purpose of imparting properties and lowering gloss.

At a portion where automobile interior parts including these are in contact with each other, the interior parts rub against each other due to vibration during traveling of the automobile, and a squeaking noise is generated. Conventionally, as a countermeasure against this squeaking noise, a means for pasting a non-woven fabric on the contact portion has been adopted, and the non-woven fabric is interposed between two parts in contact with each other to suppress the generation of sound.

[0004]

However, in the conventional measures for sticking a non-woven fabric to the contact portion on the surface of the interior part, it is difficult to mechanize because of the fine work, and the manpower is large and the cost is high. There was a drawback.
Also, at the contact part of the door trim end and the instrument side or seat side, it is not visible when the door is closed, so there is no problem in appearance quality, but it is visible when the door is open, so apply non-woven fabric. There was a drawback that the appearance quality was inferior.

On the other hand, JP-A-3-143745, JP-A-3-143746 and JP-A-3-21742.
Japanese Patent Publication No. 5 discloses a technique of applying an anti-squealing agent, which is an elastic coating or an abnormal noise preventing coating applied as a substitute for a non-woven fabric, to a portion where noise is generated in a contact portion on the surface of an automobile interior part. .

[0006] However, these methods are methods in which a part is molded in a part where a sound is generated and then an inhibitor is applied to a contact part on the surface of the interior part as a post-treatment, so that automation is possible, but newly. There is a drawback that a coating process is required. Further, since these methods are intended to prevent only the squeaking noise, they have a drawback that they deteriorate the appearance quality and cannot be applied to a noticeable part.

Further, Japanese Patent Laid-Open No. 5-156206 discloses a coating agent containing urethane fine particles in a urethane resin. However, this urethane-based paint has a drawback that it is higher in cost than the acrylic-based paint and that it is inferior to the acrylic-based paint in terms of a single sound generated when a contacting component slides out.

Therefore, the present invention has been made by paying attention to such a conventional problem, and prevents the squeaking noise generated at the contact portion on the surface of the interior parts of the automobile, and at the same time, the interior parts that have been conventionally used. It is an object of the present invention to provide a squeaking noise preventing surface treatment agent that enables simplification of the process (omission of the non-woven fabric attaching process) as compared with the method of attaching the non-woven fabric to the contact portion of the surface.

[0009]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that when a predetermined amount of urethane particles is contained in a resin for acrylic-vinyl chloride type coating, The inventors have found that it is possible to effectively prevent the squeaking noise generated by the rubbing of the interior parts due to the vibration during the traveling of the automobile, and the present invention has been accomplished.

The above object of the present invention is to provide acrylic-vinyl chloride type coating resin with spherical and / or lumpy urethane particles having an average particle size in the range of 1 to 50 μm in a solid content of 2 to 60% by weight. This has been achieved by a squeaking noise-preventing surface treatment agent characterized by being contained in a range.

Further, the above object of the present invention is to provide an acrylic resin
(A) average particle size of 5 to 50 for vinyl chloride paint resins
5-60 wt% of spherical urethane particles in the range of μm,
(B) 1 to 50% by weight of resin and / or rubber fine particles having an average particle size in the range of 1 to 8 μm, and (a) and (b) in a total amount of 5 to 70% by weight. Achieved with a squeaking noise-preventing surface treatment agent.

First, the concept for reducing the squeaking noise in the present invention will be described below. The sounds generated in the vehicle interior can be roughly classified into two types. One is a single sound that is generated when the parts start to slide, and the other is a continuous sound that is generated by steady vibration while the vehicle is running. The former single sound is generated when the interior parts are impacted when starting or when climbing over a step, and the latter continuous sound can occur continuously and frequently while the vehicle is running depending on the road surface condition. Is.

The present invention has been made in view of the frequency of occurrence and the degree of discomfort felt by an occupant, and the object thereof is to reduce the continuous sound generated by the latter steady vibration.
Further, as described above, the single sound generated when the parts start to slide can be improved by using the acrylic-vinyl chloride based paint as the base paint. FIG. 1 shows an outline of the friction test by the reciprocating motion used in the test example. As shown in Figure 1,
When a test of sliding the test object 2 on the test object 1 is performed, the coefficient of friction between two objects generally fluctuates over time as shown in FIG.

It is effective to reduce the difference between the static friction coefficient and the dynamic friction coefficient for a single sound, but in order to prevent the sound generated by the continuous micro vibration, the variation of the dynamic friction coefficient (μd) is required. It is more effective to reduce the width.

On the other hand, the acrylic-vinyl chloride type paints which have been conventionally applied to the interior parts of automobiles for the purpose of reducing the gloss etc. were examined from the viewpoint of the squeaking noise. It was revealed that the added silica particles deteriorate the friction characteristics.

For this reason, the present inventors have added various fine particles other than silica to the acrylic-vinyl chloride-based paint and measured the width of the dynamic friction coefficient. As a result, the average particle diameter is 1 to 50 μm.
By containing spherical and / or lump-shaped urethane particles in the range of 2 to 60% by weight as a solid content, it becomes possible to reduce the width of the dynamic friction coefficient, and as a result, the effect of preventing squeaking noises. Found.

In the present invention, the average particle size of the urethane particles is preferably in the range of 1 to 50 μm, particularly 5 to 30 μm. If the average particle size is less than 1 μm, the urethane particles settle in the coating film and the unevenness is not formed on the surface, the matte effect is lost, and the friction characteristics are deteriorated.
On the contrary, when the thickness exceeds 50 μm, the thickness of the surface treatment agent is 30 μm.
Since it is about m, abrasion resistance is reduced.

The shape of the urethane particles is required to be spherical and / or massive in order to obtain the effects of the present invention.
It is particularly preferable that the shape is true spherical. The content of urethane particles is in the range of 2 to 60% by weight as a solid content, especially 10 to 6
It is preferably in the range of 0% by weight. If the content is less than 2% by weight, the noise preventing effect is insufficient and the matting effect is also lost. On the other hand, if it exceeds 60% by weight, it becomes impossible to form a coating film, the abrasion resistance of the coating film decreases, and the cost increases.

The squeaking noise preventing surface treatment agent of the present invention comprises a resin for acrylic-vinyl chloride paint, (a) spherical urethane particles 5 having an average particle size in the range of 5 to 50 μm.
˜60% by weight, (b) 1 to 50% by weight of resin and / or rubber fine particles having an average particle size in the range of 1 to 8 μm, (a)
And (b) in the range of 5 to 70% by weight, especially 10
It is preferable to contain 70% by weight.

When the total content of (a) and (b) is less than 5% by weight, the noise preventing effect is insufficient and the matting effect is also lost. On the other hand, if it exceeds 70% by weight, it becomes impossible to form a coating film, the abrasion resistance of the coating film is lowered, and the cost is increased. As long as it is within this range, the squeaking noise preventing effect is recognized, so that the content can be adjusted for the purpose of adjusting gloss.

The resin and / or rubber type fine particles having an average particle size of 1 to 8 μm have neither a squeaking noise preventing effect nor a matting effect even if they are added alone, but the average particle size is 5 to 50 μm.
A matting effect can be exhibited by combining with spherical urethane particles in the range of m. Further, unlike a commonly used matting agent such as silica, the squeaking noise preventing property does not deteriorate.

In the present invention, it is preferable to combine urethane particles having different particle diameters when it is necessary to adjust the surface color unevenness and luster, and the silica particles (average particle diameter 1 to 8 μm) are mixed in the range of 1 to 1. You may add in the range of 15 weight%.

When two kinds of urethane particles are combined, spherical and / or lumpy urethane particles having an average particle size of 1 to 8 μm are contained in a solid content of 1 to 50% by weight, and the average particle size is in a range of 5 to 50 μm. In the range of 2 to 60 wt% in total so that the spherical and / or lumpy urethane particles in 1) are combined with 1 to 40 wt% as a solid content and the difference in the average particle size of both urethanes is 4 μm or more. By including it, the effect of the present invention can be obtained.

As the acrylic-vinyl chloride-based coating resin, which is the main component, coating resins currently used for vehicle interiors (for example, clear coat and color coat) can be used. Can be made with.

The squeaking noise preventing surface treatment agent of the present invention comprises 1 to 6 urethane particles in a resin for acrylic-vinyl chloride paint.
0% by weight, or 5 to 60% by weight of urethane particles, 1 to 50% by weight of resin and / or rubber fine particles having an average particle size in the range of 1 to 8 μm, 5 to 70% by weight in total and various additives ( It can be prepared by adding a stabilizer, etc.) and stirring, and then introducing into a disperser a three-roll mill, a ball mill, a pot mill, a steel mill, a pebble mill, a sand mill, a roll mill and the like, and uniformly mixing and dispersing them. At this time, it is preferable to add a surfactant in order to enhance the dispersibility. Next, the mixed and dispersed material is diluted according to the coating method.

The squeaking noise-preventing surface treating agent of the present invention thus obtained can be used in the same form as the current surface treating agent for the skin material. The current usage pattern is that the surface of the sheet is coated with an air spray, an airless spray, or a gravure roll in the process of manufacturing a PVC sheet that is a skin of an interior product. Spray coating, brush coating, roller coating, and dip coating may be applied to other components and parts depending on the shape and surface form of the coating portion.

Parts to which the squeaking noise preventing surface treatment agent of the present invention is applied include an instrument panel, a door trim, and
In addition to skins such as pillar garnish, sun visor and seat leather, assembly parts such as meter clusters and console boxes can be mentioned. Examples of the material of the parts to be applied include PVC skins and TPO skins as the skin, and various plastics, rubbers, metals, glass and the like for other parts and parts.

[0028]

Next, the operation of the present invention will be described. Currently used surface-treating agents have spherical and / or lumpy urethane particles having an average particle size in the range of 1 to 50 μm as solid content of 2
By adding in the range of up to 60% by weight, it is possible to prevent the squeaking noise generated by the steady vibration when the vehicle is running. This is because, by adding spherical soft particles, since smooth irregularities are formed on the surface of the coating film, stress concentration is less likely to occur at the contact surface, and it is less likely that a catch with the mating material surface will occur. Conceivable.

When it is necessary to adjust the surface color unevenness or luster, the flaky fluorine particles having an average particle size in the range of 1 to 8 μm, amorphous NBR rubber particles and amorphous SBR rubber particles are used. It is preferable to contain at least one selected, and silica particles (average particle size 1 to 8 μm)
1 to 15% by weight may be added.

Since this coating layer is formed in the sheet surface treatment process which is currently performed, it is not necessary to introduce a new process, and the conventional non-woven fabric attaching process can be omitted. Furthermore, since the squeaking noise preventing function is added to the currently used surface treatment agent, the appearance quality is not impaired, so that it can also be applied to a portion that is visible to the human eye. In addition, since a coating layer is formed on the entire seat, squeaking noises of instrument panels, door trims, pillar garnishes, sun visors, seat leathers, etc. and the parts assembled with them, and parts that interfere with them are also reduced. can do.

[0031]

EXAMPLES The present invention will now be described in more detail by way of examples, which should not be construed as limiting the invention.

Example 1 Urethane particles (average particle size: 15 μm, true sphere) were added to an acrylic-vinyl chloride coating resin at 40% by weight as a solid content.
After the addition, it was stirred. Then, after mixing and dispersing with a sand grind mill, it was diluted to 50% with a diluent to prepare a squeaking noise preventing surface treatment agent of Example 1.

Example 2 In addition to urethane particles, 30% by weight of silica particles (average particle size 3 μm, spherical) was added to the acrylic-vinyl chloride-based coating resin.
The squeaking noise preventing surface treating agent of Example 2 was prepared in exactly the same manner as in Example 1 except that the additives were added.

Example 3 Urethane particles A were added to an acrylic-vinyl chloride paint resin.
30% by weight (average particle size 15 μm, true sphere) and 30% by weight of urethane particles B (average particle size 5 μm, sphere) were added in exactly the same manner as in Example 1, and the squeaking noise prevention surface of Example 3 was added. A treating agent was prepared.

Example 4 Urethane particles A were added to an acrylic-vinyl chloride paint resin.
25% by weight (average particle size 15 μm, true sphere) and 25% by weight of urethane particles B (average particle size 5 μm, sphere) were added,
Further, a squeaking noise preventing surface treating agent of Example 4 was prepared in exactly the same manner as in Example 1 except that 7% by weight of silica particles (average particle diameter 3 μm) was added.

Example 5 40% by weight of urethane particles (average particle size 15 μm, true sphere) were added to the acrylic-vinyl chloride coating resin, except that 40% by weight was added.
The squeaking noise preventing surface treating agent of Example 5 was prepared in exactly the same manner as in Example 1.

Comparative Example 1 A squeaking noise preventing surface treating agent of Comparative Example 1 was prepared in exactly the same manner as in Example 1 except that urethane particles were not added.

Comparative Example 2 Instead of urethane particles, silica particles (average particle size 5.0 μ
m, true sphere) was added in the same manner as in Example 1 except that 60% by weight was added to prepare a squeaking noise preventing surface treating agent of Comparative Example 2.

Comparative Example 3 Instead of urethane particles, acrylic particles (average particle size 5.0 μm
m, true sphere) was added in the same manner as in Example 1 except that 60% by weight was added to prepare the squeaking noise preventing surface treatment agent of Comparative Example 3.

Comparative Example 4 Nylon particles (average particle size: 10 μm) were used instead of the urethane particles.
m, amorphous) was added in the same manner as in Example 1 except that 60% by weight was added to prepare a squeaking noise preventing surface treatment agent of Comparative Example 4.

Comparative Example 5 Instead of urethane particles, fluorine particles (average particle size 10 μm,
A squeaking noise preventing surface treating agent of Comparative Example 5 was prepared in exactly the same manner as in Example 1 except that 60% by weight of (lumps) was added.

Comparative Example 6 The squeaking noise of Comparative Example 6 was completely the same as in Example 1 except that 60% by weight of urethane particles (average particle size: 3 μm, amorphous) were added to the acrylic-vinyl chloride coating resin. A surface treatment agent was prepared.

Comparative Example 7 The squeaking noise preventive surface of Comparative Example 7 was carried out in the same manner as in Example 1 except that 60% by weight of urethane particles (average particle size 60 μm, spherical) were added to the acrylic-vinyl chloride coating resin. A treating agent was prepared.

Comparative Example 8 A conventionally used nonwoven fabric is referred to as Comparative Example 8.

Test Results In order to compare the squeaking noise preventing effect of each surface treatment agent obtained in Examples 1 to 5 and Comparative Examples 1 to 8, the current surface untreated P
Each surface treatment agent was applied to the VC sheet and the coating film was cured to prepare a test sheet. A general PVC sheet for automobile interiors was used as the mating material of the sheet thus obtained, and a friction test by reciprocating motion was performed to evaluate the friction characteristics and confirm whether or not a squeaking noise was generated. Further, the 60-degree surface glossiness after coating was measured with a gloss meter. Table 1 shows the results.

[0046]

[Table 1]

As shown in Table 1, the paints obtained in the examples did not generate any noise, and the width of the coefficient of dynamic friction was as small as the non-woven fabric currently used as a measure against squeaking noise.
It can be seen that it has a squeaking noise prevention effect. In addition, a matting effect was also confirmed. On the other hand, the paint obtained in Comparative Example 1 is effective against squeaking noises, but lacks in matting effect and is inferior in marketability. In Comparative Examples 2 to 4 and 6, although the matting effect is imparted, the range of the dynamic friction coefficient becomes large and a squeaking noise is generated. Comparative Example 5 also has a small matte degree.

Example 6 20% by weight of urethane particles (average particle size: 15 μm, true sphere) as solid content with respect to 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65) and commercially available Frozen powder of NBR rubber (average particle size 5μ
40% by weight of m) was added as a solid content and stirred. Then, after mixing and dispersing with a sand grind mill, 100: 2 with a diluent (toluene, xylene, MEK).
It was diluted to 00 to prepare the squeaking noise preventing surface treating agent of Example 6.

Example 7 Instead of the commercially available freeze-dried particles of NBR rubber (average particle size 5 μm), the freeze-pulverized particles of commercially available SBR rubber (average particle size 5 μm)
Example 7 exactly the same as Example 6 except that m) was used.
A squeaking noise preventing surface treatment agent was prepared.

Example 8 Example 8 was carried out in the same manner as in Example 6 except that commercially available flaky fine particles (average particle size 5 μm) were used instead of the commercially available frozen NBR rubber particles (average particle size 5 μm). No. 8 squeaking noise surface treatment agent was prepared.

Example 9 40% by weight of urethane particles (average particle size 15 μm, true spherical shape) as solid content based on 100% by weight of acrylic-vinyl chloride type coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
A squeaking noise preventing surface treating agent of Example 9 was prepared in the same manner as in Example 6 except that 10% by weight of m) was added as a solid content.

Example 10 Instead of the commercially available freeze-dried particles of NBR rubber (average particle size 5 μm), freeze-dried particles of commercially available SBR rubber (average particle size 5 μm)
Example 1 exactly the same as Example 9 except that m) was used.
No squeaking noise surface treatment agent was prepared.

Example 11 An example was carried out in the same manner as in Example 9 except that commercially available flaky fine particles (average particle size 5 μm) were used in place of the freeze-ground particles (average particle size 5 μm) of commercially available NBR rubber. Eleven anti-squeaking surface treatment agents were prepared.

Example 12 40% by weight of urethane particles (average particle diameter 15 μm, true sphere) as solid content based on 100% by weight of acrylic-vinyl chloride type coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
Example 12 was carried out in the same manner as in Example 6 except that 10% by weight of m) was added as solid content and 11% by weight of silica particles (average particle size 3 μm, amorphous) dispersed by Dynamill was added as solid content. A squeaking noise preventing surface treatment agent was prepared.

Example 13 Instead of the commercially available freeze-dried particles of NBR rubber (mean particle size 5 μm), the freeze-milled particles of commercially available SBR rubber (average particle size 5 μm)
The creaking noise preventing surface treating agent of Example 13 was prepared in exactly the same manner as in Example 12 except that m) was used.

Example 14 Example 14 was carried out in the same manner as in Example 12 except that commercially available flaky fluorine-containing fine particles (average particle size 5 μm) were used in place of the commercially available freeze-dried particles of NBR rubber (average particle size 5 μm). The anti-squealing surface treatment agent of Example 14 was prepared.

Example 15 30% by weight of urethane particles (average particle size 15 μm, true sphere) as solid content based on 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
m) as a solid content and 10% by weight as freeze-dried particles of commercially available SBR rubber (average particle size 5 μm) as a solid content were added in an amount of 10% by weight in the same manner as in Example 15. An anti-sound surface treatment agent was prepared.

Example 16 Example 16 was carried out in the same manner as in Example 15, except that commercially available flaky fluorine fine particles (average particle size 5 μm) were used in place of the freeze-ground particles (average particle size 5 μm) of commercially available NBR rubber. The anti-squealing surface treating agent of Example 16 was prepared.

Example 17 The same procedure as in Example 15 was carried out except that commercially available flaky fine particles (average particle size: 5 μm) were used instead of the freeze-ground particles (average particle size: 5 μm) of commercially available SBR rubber. The anti-squealing surface treatment agent of Example 17 was prepared.

Example 18 Urethane particles (average particle size 15 μm, true sphere) as solid content of 30% by weight based on 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
m) as a solid content, 10 wt% of commercially available SBR rubber freeze-pulverized particles (average particle size 5 μm) as a solid content, and silica particles (average particle size 3 μm, amorphous) dispersed by a dynamill are solid. The squeaking noise preventing surface treating agent of Example 18 was prepared in the same manner as in Example 6 except that 7% by weight was added as a component.

Example 19 Example 19 was carried out in the same manner as in Example 18 except that commercially available flaky fluorine fine particles (average particle size 5 μm) were used instead of the commercially available freeze-dried particles of NBR rubber (average particle size 5 μm). The anti-squealing surface treatment agent of Example 19 was prepared.

Example 20 Example 20 was carried out in the same manner as in Example 18 except that commercially available flaky fluorine fine particles (average particle size 5 μm) were used in place of the commercially available freeze-dried particles of SBR rubber (average particle size 5 μm). The anti-squealing surface treatment agent of Example 20 was prepared.

Example 21 25% by weight of urethane particles (average particle size 15 μm, true sphere) as solid content with respect to 100% by weight of acrylic-vinyl chloride type coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
m) as a solid content, 8% by weight of commercially available SBR rubber freeze-ground particles (average particle size 5 μm) as a solid content, and commercially available flaky fluorine-containing fine particles (average particle size 5 μm) as a solid content of 8% by weight. The squeaking noise preventive surface treating agent of Example 21 was prepared in exactly the same manner as in Example 6 except that the addition of C.

Example 22 25% by weight of urethane particles (average particle size 15 μm, true spherical shape) as solid content with respect to 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
m) as solid content 8% by weight, commercially available SBR rubber freeze-ground particles (average particle size 5 μm) as solid content 8% by weight,
Other than adding 8% by weight of commercially available flaky fluorine-containing fine particles (average particle size 5 μm) as solid content and 7% by weight of silica particles (average particle size 3 μm, amorphous) dispersed by Dynamill as solid content Example 2 Exactly the same as Example 6
No. 2 squeaking noise surface treatment agent was prepared.

Comparative Example 9 A creaking noise-preventing surface treating agent of Comparative Example 9 was prepared in exactly the same manner as in Example 6 except that urethane particles and freeze-dried particles of NBR rubber were not added.

Comparative Example 10 Silica particles (average particle size: 3 μm, irregular shape) dispersed by Dynamill with respect to 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65).
A squeaking noise preventing surface treating agent of Comparative Example 10 was prepared in the same manner as in Example 6 except that 20% by weight was added as a solid content.

Comparative Example 11 Urethane particles (average particle size: 15 μm, true spherical shape) as solid content of 70% by weight were added to 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65). Comparative Example 1 in the same manner as in Example 6 except that
No. 1 squeaking noise surface treatment agent was prepared.

The obtained surface treating agent was applied to a current surface-untreated PVC sheet to prepare a test sheet, which was subjected to a friction test. As a result, powder fell off during the test and it was not practical.

Comparative Example 12 Acrylic-vinyl chloride coating resin 100% by weight (acrylic: 35, vinyl chloride: 65), urethane particles (average particle size 3 μm, true sphere) as solid content of 60% by weight.
Comparative Example 12 in exactly the same manner as in Example 6 except that
A squeaking noise preventing surface treatment agent was prepared.

Comparative Example 13 3% by weight of urethane particles (average particle size 15 μm, true sphere) as solid content based on 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65).
Comparative Example 13 was carried out in the same manner as in Example 6 except that
A squeaking noise preventing surface treatment agent was prepared.

Comparative Example 14 Acrylic-vinyl chloride coating resin 100% by weight (acrylic: 35, vinyl chloride: 65), urethane particles (average particle size 15 μm, amorphous) as solid content 50% by weight, commercially available Frozen powder of NBR rubber (average particle size 5μ
m) as solid content 8% by weight, commercially available SBR rubber freeze-ground particles (average particle size 5 μm) as solid content 8% by weight,
A squeaking noise preventing surface treating agent of Comparative Example 14 was prepared in exactly the same manner as in Example 6 except that 8% by weight of commercially available flaky fluorine-containing fine particles (average particle diameter 5 μm) was added as a solid content.

The obtained surface treating agent was applied to a current surface-untreated PVC sheet to prepare a test sheet, which was then subjected to a friction test. As a result, powder fell off during the test and it was not practical.

Comparative Example 15 40% by weight of urethane particles (average particle size 15 μm, true spherical shape) as solid content based on 100% by weight of acrylic-vinyl chloride type coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
A squeaking noise preventing surface treating agent of Comparative Example 15 was prepared in exactly the same manner as in Example 6 except that 30% by weight of m) was added as a solid content.

The obtained surface-treating agent was applied to a current surface-untreated PVC sheet to prepare a test sheet, which was subjected to a friction test. As a result, powder fell off during the test and it was not practical.

Comparative Example 16 Urethane particles (average particle size 15 μm, true sphere) as solid content of 40% by weight and commercially available with respect to 100% by weight of acrylic-vinyl chloride type coating resin (acrylic: 35, vinyl chloride: 65). SBR rubber frozen pulverized particles (average particle size 5μ
A squeaking noise preventing surface treatment agent of Comparative Example 16 was prepared in exactly the same manner as in Example 1 except that 30% by weight of m) was added as a solid content.

The surface treating agent thus obtained was applied to a current surface untreated PVC sheet to prepare a test sheet, which was then subjected to a friction test. As a result, powder fell off during the test and it was not practical.

Comparative Example 17 Urethane particles (average particle size 15 μm, true spherical shape) as solid content of 40% by weight and commercially available with respect to 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65). A creaking noise preventing surface treating agent of Comparative Example 17 was prepared in exactly the same manner as in Example 6 except that 30% by weight of the flaky fluorine-containing fine particles (average particle diameter: 5 μm) as a solid content was added.

The obtained surface treatment agent was applied to a current surface-untreated PVC sheet to prepare a test sheet, which was subjected to a friction test. As a result, powder fell off during the test and it was not practical.

Comparative Example 18 30% by weight of urethane particles (average particle size: 15 μm, true sphere) as solid content based on 100% by weight of acrylic-vinyl chloride coating resin (acrylic: 35, vinyl chloride: 65), commercially available Frozen powder of NBR rubber (average particle size 5μ
m) as a solid content, 10% by weight of commercially available SBR rubber frozen and pulverized particles (average particle size 5 μm) as a solid content, and commercially available flaky fluorine fine particles (average particle size 5 μm) as a solid content of 10% by weight. % And silica particles dispersed by Dynamill (average particle size 3 μm, amorphous) were added in an amount of 20% by weight as a solid content, and the squeaking noise preventing surface treating agent of Comparative Example 18 was prepared in the same manner as in Example 6. Prepared.

Test Results In order to compare the squeaking noise preventing effects of the surface treating agents of Examples 6 to 22 and Comparative Examples 9 to 18, the current surface-untreated PVC is used.
Each surface treatment agent was applied to the sheet and the coating film was cured to prepare a test sheet. A general PVC sheet for automobile interiors was used as the mating material of the sheet thus obtained, and a friction test by reciprocating motion was performed to evaluate the friction characteristics and confirm whether or not a squeaking noise was generated. Further, the 60-degree surface glossiness after coating was measured with a gloss meter. The results are shown in Table 2.

[0081]

[Table 2]

As shown in Table 2, the paints obtained in the examples did not generate any sound, and the width of the dynamic friction coefficient was as small as that of the non-woven fabric which is currently used for the squeaking noise control. I know that there is. A matting effect was also confirmed. On the other hand, the paints obtained in Comparative Examples 9 and 12 are effective against the squeaking noise, but have no matte effect and are inferior in commercial properties. The paints obtained in Comparative Examples 10 and 18 have a matte effect, but the range of the dynamic friction coefficient is large and a squeaking noise is generated. Comparative Example 13 has a small matte degree.

[0083]

EFFECTS OF THE INVENTION The squeaking noise preventing surface treatment agent of the present invention comprises 2 parts of urethane particles having a spherical and / or lump shape and an average particle size in the range of 1 to 50 μm in an acrylic-vinyl chloride coating resin.
It is obtained by adding in an amount of up to 60% by weight, and by applying this, it is possible to effectively prevent the squeaking noise due to the contact between parts.

Further, since the surface treatment agent of the present invention can be applied to the entire surface of the raw sheet in the surface treatment step which is currently performed, the introduction of a new step and the attachment of the non-woven fabric become unnecessary, and Simplification is achieved. Furthermore,
The effect that it can be applied to parts that are noticeable such as the door trim and the instrument end or the seat side is obtained. In addition, the characteristic that the acrylic-vinyl chloride-based coating resin is superior to the urethane resin even in the case of a single tone was maintained even when such urethane beads were added.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of a friction test by reciprocating motion used in a test example.

FIG. 2 is a diagram showing a change in a friction coefficient with respect to time obtained by the friction test shown in FIG.

[Explanation of symbols]

 1 DUT 2 DUT

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Satoshi Ichikawa 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Kuniko Matsutani 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd.

Claims (5)

[Claims] 1. An acrylic-vinyl chloride coating resin,
A squeaking noise preventing surface treatment agent comprising spherical and / or lumpy urethane particles having an average particle size in the range of 1 to 50 μm in a range of 2 to 60% by weight as a solid content. 2. A resin for acrylic-vinyl chloride paint,
(A) 5 to 60% by weight of spherical urethane particles having an average particle size of 5 to 50 μm, (b) an average particle size of 1 to 8 μm
1 to 50% by weight of the resin and / or rubber fine particles in the range of 5 to 70% by weight of (a) and (b) in total, and a squeaking noise preventing surface treatment agent. 3. Spherical and / or lumpy urethane particles having an average particle size in the range of 1 to 8 μm as a solid content of 1 to 50.
1% to 40% by weight of spherical and / or agglomerated urethane particles having a mean particle size in the range of 5 to 50 μm as a solid content is combined, and the difference in the mean particle size of both urethane particles is 4 μm or more. 2. The squeaking noise preventing surface treatment agent according to claim 1, wherein the surface treatment agent comprises 2 to 60% by weight in total. 4. The squeaking noise-preventing surface-treating agent according to claim 1, which comprises 1 to 15% by weight of silica particles having an average particle diameter in the range of 1 to 8 μm as a matting agent. 5. The squeaking sound according to claim 2, wherein the component (b) is at least one selected from the group consisting of flaky fluorine particles, amorphous NBR rubber particles, and amorphous SBR rubber particles. Preventive surface treatment agent.