JP2000026787A - Composition for preventing squeak noise - Google Patents

Abstract

(57) [Summary] (Corrected) [PROBLEMS] To provide a composition for preventing generation of squeak noise caused by friction between a flexible material such as rubber or sponge and a hard resin or metal. A composition for preventing squeak noise comprising (a) a polytetrafluoroethylene resin powder, (b) a resin binder, and (c) silicone. Component (c) may be silicone and a solvent, or only a solvent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for preventing generation of squeak noise caused by friction between a flexible material such as rubber and sponge and a hard resin or metal.

[0002]

2. Description of the Related Art Abnormal noise may be generated due to friction between resin and resin or between resin and metal. For example, in an automobile, interior parts rub against each other due to vibration during traveling, and for example, squeak noise is generated in an instrument panel section, a sheet mold pad section, a door trim section, and a pyragarnish section. In recent years, in order to give a car a sense of quality and quietness, measures have been taken to prevent this squeak noise. As one of them, the application of a nonwoven fabric for reducing squeak noise and the application of a chemical agent (squeak noise preventive agent) are performed on the rubbing part. In the past, an inhibitor containing wax as a main component was used as the squeak inhibitor. Recently, various types of improved waxes have been developed. For example, JP-A-08-27409 discloses an inhibitor containing spherical rubber-like fine particles in an acryl-vinyl chloride paint resin. JP-A-05-156206 describes that
There is disclosed a noise control agent in which fine particles made of a urethane-based resin are contained in a silicone-copolymerized urethane-curable resin.

[0003]

A composition as described above,
For example, those containing wax as a main component have stickiness at the application site, cannot be used where humans can touch, and have poor prevention performance and durability. Further, the compositions disclosed in JP-A-08-27409 and JP-A-05-156206 have been improved in performance as described above, but when applied to a flexible material, the friction is increased and the squeak is rather increased. It has the disadvantage of increasing sound. The present invention has been made to solve the above problems, that is, it has a good squeak prevention effect even on a flexible material, there is no stickiness in the coating film, and the coating film is completely dried. Accordingly, it is an object of the present invention to provide a composition for preventing squeak noise which does not have a fogging effect of fogging glass or the like, does not inhibit the adhesiveness of the adhesive sheet, and has excellent durability and adhesion.

[0004]

SUMMARY OF THE INVENTION The present invention provides a composition for preventing squeak noise comprising (a) a polytetrafluoroethylene resin powder and (b) a resin binder. Furthermore, it is preferable to contain silicone. The effect of preventing squeak noise is improved.

That is, the present invention provides the following composition. 1. (A) polytetrafluoroethylene resin powder,
(B) A composition for preventing squeak noise containing a resin binder. 2. (A) polytetrafluoroethylene resin powder,
A squeak preventing composition comprising (b) a resin binder and (c) silicone. 3. (A) The polytetrafluoroethylene resin powder is
A squeak preventing composition comprising 40% by weight, (b) 1 to 50% by weight of a resin binder, and (c) 98 to 10% by weight of a solvent. 4. 4. The squeak-preventing composition according to the above item 3, which contains 0.5 to 50% by weight of silicone instead of a part of the solvent.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The polytetrafluoroethylene resin (hereinafter referred to as PTFE) used in the present invention is used in a state where fine particles are dispersed. Although the molecular weight of PTFE is not particularly limited, it is generally 1,000 to 10,000,000. Preferably, it is between 10,000 and 5,000,000. An average particle diameter of generally 10 μm or less is used. Preferably, it is 3 μm or less. The PTFE powder is used in a state of being dispersed in a solvent. As a dispersion method, a method of dispersing the PTFE powder in a solvent using a surfactant or a dispersion obtained by emulsion polymerization can also be used. As a surfactant used for dispersion, any of anionic, cationic, nonionic and amphoteric surfactants may be used.

[0007] The amount of PTFE powder used is generally 1 to 40% by weight based on the whole composition. Preferably, it is 3 to 30% by weight. If the content is 0.5% by weight or less, the effect of preventing squeak noise cannot be expected much, and if the content is 40% by weight or more, there is a risk that the economical point and the film forming property may be deteriorated.

[0008] The resin binder used in the present invention comprises:
It functions as a binder for PTFE particles, and has a film-forming property especially at room temperature. For example, acrylic resin, epoxy resin, polyurethane, vinyl acetate,
Phthalic acid type, polyester type, melamine type, acryl urethane type and the like can be mentioned. In particular, paints are preferred. When water is used as the solvent, an aqueous dispersion obtained by emulsion polymerization is preferred. The amount used is 1 to the entire composition.
50% by weight. Preferably, it is 5-45% by weight.

Further, the addition of silicone is more effective in preventing squeak noise. The silicone in the present invention means a silicone oil and a silicone resin, and when water is used as a solvent, an aqueous dispersion obtained by emulsion polymerization is preferred. The amount of silicone used is 0.5 to the total composition.
５０50% by weight, preferably 1-30% by weight. If the content is more than 50% by weight, the coating film becomes sticky,
There is a problem that friction is increased or contamination is easily caused.

The PTFE powder, the resin binder and the silicone are used in a state of being dissolved or dispersed in a solvent, and the solvent is an organic solvent or water. These mixtures may be used. Examples of the organic solvent include isopropylbenzene, ethylbenzene, xylene, cyclohexane, cyclohexylbenzene, cyclopentane, hydrocarbons such as solvent naphtha, diethyl adipate, ethyl acetoacetate, isoamyl benzoate, ethyl benzoate,
Isobutyl acetate, 2-ethylhexyl acetate, dimethyl phthalate, esters such as diethyl tartrate, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether,
Derivatives of polyhydric alcohols such as diethylene glycol diethyl ether and propylene glycol monomethyl ether; ketones such as methyl ethyl ketone, methyl isobutyl ketone and methyl amyl ketone; and solvents such as N, N-dimethylformamide, N-methylpyrrolidone and caprolactam. Preferably, methyl ethyl ketone and water are used. However, chlorine-based solvents have an adverse effect on the environment and the human body, so it is better not to use them. Further, those having a low flash point are not preferred in terms of safety, and preferably have a temperature of 50 ° C. or higher.

If desired, a drying regulator, a thickener, a rust inhibitor, a pigment, an antistatic agent and the like may be added to such an extent that the performance is not impaired.

The method for preparing the composition of the present invention is not particularly limited. For example, the PTFE powder, the binder, and the silicone may be stirred and mixed together with the solvent. Alternatively, a method in which PTFE is kneaded into a binder and then diluted with a solvent may be used. As the mixing device, a conventionally used device may be used, for example, a stirrer using a propeller, or a ball mill, a three-roll, a hebble mill, a sand mill, a steel mill, a pot mill or the like may be used for mixing and dispersing.

As a method of applying the composition of the present invention, conventionally used methods such as spray coating, brush coating, roller coating, and dipping are selected.

When the composition of the present invention is applied, the film thickness is as follows:
Although not particularly limited, it is generally 1 to 50 μm. Preferably it is 5 to 30 μm.

The object to which the composition of the present invention is applied is particularly intended for a flexible composition, for example, rubbers, sponges,
The object may be plastic, leather, fiber, or the like, and the object to be contacted may be the same, or may be hard resin or metal.

[0016]

EXAMPLE 1 A urethane resin for paint was used as an ethylene tetrafluoride resin (PTF).
E) Fine particles (average particle size of 5 μm) as solids
% By weight of the surfactant and 1% by weight of the surfactant relative to the PTFE particles, followed by stirring using a propeller mixer. Next, after mixing and dispersing with a three-roll mill, the mixture was diluted to 50% by weight with a diluent to prepare a squeak preventing composition. The composition was sprayed onto a polyurethane sheet using a spray gun, dried at room temperature to form a coating film (thickness: about 10 μm), and a performance test was performed using a test piece as a test piece.

As a performance test method, a steel friction element with a constant load was placed on the test piece prepared above, and the friction element was pulled horizontally with the test piece, and the friction element started moving. Were measured for the coefficient of static friction, the coefficient of kinetic friction during movement, and the range of dynamic friction coefficient fluctuation. The durability of the coating film was evaluated based on the number of reciprocating motions until the friction coefficient started to increase after the reciprocating motion of the friction element on the test piece. At the same time, we observed the occurrence of squeak noise. The adhesion of the coating film was determined by bending the test piece and observing the degree of peeling of the coating film. Table 1 shows the test results.

Example 2 A squeak preventing composition was prepared in the same manner as in Example 1 except that 5% by weight of silicone oil was added to the urethane resin for coating and PTFE was 35% by weight. In addition, performance evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 1 An acrylic-vinyl chloride coating resin having an average particle size of 30
After adding 40% by weight of solid particles of NBR rubber fine particles of μm and adding 1% by weight of a surfactant to the NBR fine particles,
The mixture was stirred with a propeller mixer. Then, after mixing and dispersing using three rolls, the mixture was diluted to 50% by weight with a diluent,
Performance evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2 The performance was evaluated in the same manner as in Example 1 using a commercially available squeak inhibitor of a hydrocarbon wax emulsion type. The results are shown in Table 1.

[0021]

[Table 1]

[0022]

The composition for preventing squeak noise according to the present invention has a good squeak noise-prevention effect even for flexible materials, has no stickiness in the coating film, has no fogging effect, and inhibits the adhesiveness of the adhesive sheet. An object of the present invention is to provide a composition for preventing squeak noise, which is further excellent in durability and adhesion.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09D 183/04 B60R 13/02 Z // B60R 13/02 B60J 5/00 501A (72) Inventor Satoshi Yamamoto 119 Atoison, Japan, Chuo-ku, Kobe-shi, Hyogo Japan (72) Inventor Takeshi Naganaga 1-2-1 Isobe-dori, Chuo-ku, Kobe-shi, Hyogo Neos Co., Ltd. (72) Inventor Shuichi Sakai Hyogo 3-1-2 Isobe-dori, Chuo-ku, Kobe-city Neos Co., Ltd. (72) Inventor Yoshiharu Michigami 3-1-2, Isobe-dori, Chuo-ku, Kobe-shi, Hyogo Neos Co., Ltd. (72) Inventor Susumu Matsuoka Hyogo Prefecture 3-1-2 Isobe-dori, Chuo-ku, Kobe F-term in Neos Corporation (reference) 3D023 BA01 BA02 BA03 BB08 BB25 BC00 BD03 BD28 BD29 BE04 BE11 B E31 4D075 CA05 DB64 DC13 EA02 EB17 EB22 EB33 EB38 EB42 EB56 EC30 4F006 AA01 AA04 AA11 AA31 AA51 AB19 AB23 AB24 AB33 AB34 AB35 AB37 AB39 AB63 AB64 BA00 BA12 CA04 DA04 4J038 CD122 CF021 CG141 DD001 DD161 JA161 JA33 JA56 JA59 JA60 JA61 JB12 JB27 JB28 KA06 KA07 KA20 NA09 NA12 PB07 PC02 PC05 PC07 PC08 PC09 PC10

Claims (4)

[Claims] 1. A squeak preventing composition comprising (a) a polytetrafluoroethylene resin powder and (b) a resin binder. 2. A squeak preventing composition comprising (a) a polytetrafluoroethylene resin powder, (b) a resin binder, and (c) silicone. 3. A method according to claim 1, wherein (a) 1 to 40% by weight of a polytetrafluoroethylene resin powder and (b) 1% by weight of a resin binder.
A composition for preventing squealing noise, which comprises 50 to 50% by weight and (c) 98 to 10% by weight of a solvent. 4. A method in which 0.5 parts of silicone is substituted for part of the solvent.
The composition for preventing squeak noise according to claim 3, which contains about 50% by weight.