JP2002322464A - Sealing composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing composition from which a separate plate for a control bulb in an automatic transmission can be produced at a low cost and which can provide excellent sealing characteristics, and to provide the separate plate which has a sealing portion using the sealing composition and is used for the control bulb in the automatic transmission. SOLUTION: This sealing composition is characterized by comprising 40 to 97 wt.% of a UV light-curable resin composition, 2 to 20 wt.% of an adhesive for adhesion, and 1 to 40 wt.% of a pigment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sealant composition capable of providing a separate plate for a control valve in an automatic transmission having an excellent sealing function, and to a control valve in an automatic transmission using the sealant composition. Related to a separate plate.

Conventionally, a paper gasket has been used as a seal mechanism of a separate plate for a control valve in an automatic transmission, and a paper gasket punched in a predetermined pattern is bonded to the front and back of a metal plate. Separate plates are currently most widely used. The separate plate for a control valve in an automatic transmission having such a configuration is said to have excellent heat resistance, oil resistance, rupture resistance, and torque down resistance. However, the operation of accurately bonding a paper gasket punched in a predetermined pattern to a predetermined position on a metal plate is complicated and expensive, and furthermore, the paper gasket is vulnerable to moisture. There is a point.

Accordingly, attempts have been made to form a sealing mechanism for a separate plate for a control valve in an automatic transmission using a cured layer of a thermosetting substance such as a rubber-based elastic material, foamed rubber, or phenol resin. For example, Japanese Patent No. 2697569 discloses a seal structure that seals between a separate plate and a valve body of a control valve unit of an automatic transmission in a liquid-tight or air-tight manner. There is disclosed a seal structure in which a seal layer is formed by pattern printing in a pattern corresponding to a mating surface of a valve body so as not to be exposed to an oil groove or a groove portion formed in the valve body. According to this patent, it is described that letterpress printing, lithographic printing, intaglio printing, screen printing, flocking printing, magnetic printing, hot stamping and the like are used as pattern printing. It also describes that the ink used for pattern printing is an ink made of a natural resin material, a synthetic resin material, a synthetic rubber material, or the like.

[0004] Japanese Patent No. 2993445 discloses a seal structure for sealing between two members in a liquid-tight or air-tight manner, wherein at least one of the mating surfaces of the two members has a sealing portion on the mating surface. A seal portion is formed by continuous printing along the width of the seal portion, and a concave portion or a groove is formed at a merging portion where at least a plurality of seal portions intersect at an intermediate portion in the width direction of the seal portion. A seal structure is disclosed. According to this patent, it is described that as a printing technique, it is possible to employ a printing technique such as letterpress printing, lithographic printing, intaglio printing, screen printing, flocking printing, magnetic printing, hot stamping, or a material application technique using a dispenser as pattern printing. ing. Also,
As a material constituting the seal portion, for example, fluoro rubber,
Synthetic rubber materials such as NBR rubber, SBR rubber, silicone rubber, epoxy resin, silicone resin, phenol resin, urethane resin, polyimide resin, vinyl chloride resin, acrylic resin, polyurethane resin, AB
Synthetic resin materials such as S-based resin and PTFE (tetrafluoroethylene) -based resin, ultraviolet-curable synthetic resin materials, and aluminum alloys for these synthetic rubber materials and synthetic resin materials
It is also disclosed that a composite material mixed with metal powder such as copper, brass, stainless steel, glass powder or glass fiber, ceramic powder or ceramic fiber, molybdenum disulfide powder or the like can be used.

Further, Japanese Patent Application Laid-Open No. 9-303562 discloses a seal structure for sealing between two members in a liquid-tight or air-tight manner, wherein at least one of the mating surfaces of the two members has a first seal. A second seal layer formed by printing and made of a material softer than the first seal layer, at least partially overlapping the first seal layer, and having a print height higher than the first seal layer; Is formed by printing along a first seal layer, and a seal portion including both seal layers seals between two members in a liquid-tight or air-tight manner. It is described that the same techniques and materials as those in the above-mentioned Japanese Patent No. 2993445 can be used as the printing technique and the material of the seal layer.

[0006]

The above publication discloses an ultraviolet curable synthetic resin material as a material that can be used for forming a seal member by a printing technique.
There is no specific example of using the synthetic resin material, and in the above-mentioned publication, a thermosetting rubber or resin is actually used as a material of the seal member. However, if a thermosetting material is used, it is necessary to provide a step of heating and curing after forming a seal member by a printing technique, which naturally requires a large-scale facility, and the inside of an automatic transmission is required. This leads to an increase in the manufacturing cost of the control valve separate plate. In addition, thermosetting materials include:
Usually, a solvent is blended, and a large-scale facility and a large cost are required for the process of recovering the solvent generated during heating and curing. Furthermore, the sealing characteristics are not sufficient compared to the type in which a paper gasket is bonded to the separate plate, and the separate plate for the control valve in an automatic transmission equipped with a seal member using printing technology is a mini vehicle. At present, it is only slightly used for vehicle models with low required characteristics.

Further, as described above, it is described in the prior art that an ultraviolet-curable synthetic resin material can be used as a material for a seal member of a separate plate for a control valve in an automatic transmission. Certainly, in order to eliminate the process of heating and curing the seal member in order to reduce the manufacturing cost of the separate plate for the control valve in the automatic transmission, the seal member must be made by simply irradiating ultraviolet rays as the material of the seal member. It is advantageous to use a UV curable synthetic resin material that can be cured. Further, unlike a thermosetting material, there is also an advantage that it can be easily used without a solvent and can be used as a cured body of nearly 100%.

However, according to the study of the present inventors, it has been found that an ultraviolet curable paint or an ultraviolet curable resin generally used in other fields at present is applied alone to the surface of a separate plate for a control valve in an automatic transmission. It was found that even if a seal member was formed, sufficient adhesive strength could not be obtained, and that various characteristics could not be obtained as a separate plate for a control valve in an automatic transmission.

Accordingly, an object of the present invention is to provide a sealant composition and a sealant composition capable of providing an inexpensive manufacture of a separate plate for a control valve in an automatic transmission and providing excellent sealing properties. An object of the present invention is to provide a separate plate for a control valve in an automatic transmission, which is provided with a seal portion formed using the seal portion.

[0010]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have found that an automatic transmission using a sealant composition obtained by mixing an adhesive for adhesion with an ultraviolet-curable resin composition. The present inventors have found that good characteristics can be obtained by forming a seal portion on a separate plate for a control valve, and have completed the present invention.

That is, the sealant composition of the present invention comprises 40 to 97% by mass of the ultraviolet-curable resin composition, and 2 to 2 adhesive bonding agents.
0% by mass and 1 to 40% by mass of a pigment.

The sealant composition of the present invention is characterized in that the ultraviolet curable resin in the ultraviolet curable resin composition is a radical polymerization type ultraviolet curable resin.

Further, the sealant composition of the present invention is characterized in that the adhesive agent for adhesion comprises one or more selected from the group consisting of monoisocyanate, diisocyanate and triisocyanate.

[0014] The sealant composition of the present invention is characterized in that the pigment is an organic pigment or an inorganic pigment.

Further, the sealant composition of the present invention is characterized in that it contains a thermal expansion material in an amount of 0.2 to 20% by mass on an outer basis.

Further, the separate plate for a control valve in an automatic transmission according to the present invention is characterized in that a seal portion made of a cured layer of the sealant composition is provided at a predetermined position on at least one surface of the separate plate.

Further, the separate plate for a control valve in an automatic transmission according to the present invention is characterized in that the cured layer of the sealant composition has a thickness of 20 to 150 μm.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The sealant composition of the present invention comprises an ultraviolet curable resin composition, an adhesive curing agent and a pigment. Here, the compounding ratio of the ultraviolet curable resin composition is 40 to 97% by mass, preferably 45 to 97% by mass.
It is in the range of 94% by mass. Here, when the blending ratio of the ultraviolet curable resin composition is less than 40% by mass, it is not preferable because the function as a resin cannot be exhibited.
On the other hand, if the mixing ratio exceeds 97% by mass, it is not preferable because the sealing property is lowered and the adhesion to the base material (core material) is insufficient.

As the ultraviolet curable resin used in the ultraviolet curable resin composition used in the present invention, a radical polymerization type ultraviolet curable resin is preferable. Examples of the radical polymerization type ultraviolet curing polymerization include monofunctional acrylates such as isobornyl acrylate, acryloyl morpholine, and N-vinylcaprolactam; Examples include polyfunctional acrylates such as functional acrylates, trimethylolpropane triacrylate, and ditrimethylolpropane tetraacrylate; acrylic oligomers such as polyester acrylate, urethane acrylate, and epoxy acrylate; and unsaturated polyesters using fumaric acid and maleic acid. . The UV-curable resin may be of an aqueous type such as an aqueous emulsion or a water-soluble UV-curable resin. The UV-curable resin composition is composed of essential components such as the UV-curable resin, a polymerization initiator and a polymerization initiation auxiliary, and optional components such as a stabilizer, a polymerization inhibitor and a leveling agent. The UV-curable resin composition used in the sealant composition of the present invention is not particularly limited, and may include, for example, UPICOAT 60 (trade name) manufactured by Nippon Paint Co., Ltd.

Examples of the adhesive agent for adhesion which can be used in the sealant composition of the present invention include, for example, methyl isocyanates such as methyl isocyanate, ethyl isocyanate, isopropyl isocyanate, phenyl isocyanate, and isocyanate. Monoisocyanates such as naphthyl and derivatives thereof, 1,6-hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), tolylene diisocyanate (TDI),
Diisocyanates such as xylene diisocyanate (XDI) and derivatives thereof, and triisocyanates and derivatives thereof can be used. The compounding amount of the adhesive for adhesion is 2 to 20.
%, Preferably in the range of 5 to 15% by weight. If the blending amount of the adhesive for adhesion is less than 2% by mass, the adhesion becomes insufficient, and peeling from the core material occurs, which is not preferable. On the other hand, if the compounding amount exceeds 20% by mass, it is not preferable because the ultraviolet curable resin composition as the main material is hardened by ultraviolet rays.

The pigment that can be used in the sealant composition of the present invention is not particularly limited as long as it does not inhibit the curing of the ultraviolet-curable resin composition. An organic pigment or an inorganic pigment having a function such as a coloring pigment can be used, and examples thereof include pigments used in ordinary paints, for example, titanium dioxide, cyanine blue, Shinkasha red, carbon black, and red iron oxide. The amount of the pigment is 1 to 40% by mass, preferably 2 to 3% by mass.
5% by mass. If the blending amount of the pigment is less than 1% by mass, it is not preferable because it is difficult to detect a nonconforming portion at the time of production. Inhibits curing,
This is not preferred because the resulting cured layer may become brittle.

The sealant composition of the present invention may contain a thermal expansion material in an amount of 0.2 to 20% by mass in order to further improve the sealing property. Here, if the blending amount of the thermal expansion material is less than 0.2% by mass, it is not preferable because there is no effect of addition and blending, and if the blending amount exceeds 20% by mass, brittleness increases. It is not preferable to do. Examples of the thermal expansion material include expandable graphite, thermally expandable microcapsules, and expandable resin beads.

Next, the separate plate for a control valve in an automatic transmission according to the present invention is characterized in that a seal portion made of a cured layer of the sealant composition of the present invention is provided at a predetermined position on at least one surface of the separate plate. And

Here, the separate plate for a control valve in an automatic transmission of the present invention is obtained by applying the sealant composition of the present invention having the above-mentioned composition to a separate plate for a control valve in an automatic transmission by a conventional method. It can be manufactured by forming a cured layer obtained by irradiating ultraviolet rays to cure the cured layer as a seal portion.

The method of applying the liquid to the separate plate for the control valve in the automatic transmission is not particularly limited, and a commonly known method can be adopted.
For example, pattern printing such as letterpress printing, lithographic printing, intaglio printing, screen printing, flocking printing, magnetic printing, hot stamping, or a material application technique using a dispenser can be used.

In the separate plate for a control valve in an automatic transmission according to the present invention, the cured layer of the sealant composition, that is, the thickness of the seal portion is 20 to 150 μm.
Preferably it is in the range of 50 to 120 μm. here,
When the thickness of the hardened layer is less than 20 μm, the sealing property is deteriorated, which is not preferable.
When m exceeds m, it is not preferable because ultraviolet rays cannot reach the bonding surface between the sealant composition and the core material, resulting in uneven curing, insufficient pressure resistance during fastening, and increased stress relaxation.

The material of the core material serving as the main body of the separate plate for the control valve in the automatic transmission of the present invention is not particularly limited. . In addition,
When applying the sealant composition to the core, the core is preferably subjected to a degreasing treatment and a blast treatment. Further, a chemical treatment or a primer treatment may be performed instead of the blast treatment. Further, a commercially available decorative steel plate can be used as the core material.

[0028]

EXAMPLES The sealant composition of the present invention and a separate plate for a control valve in an automatic transmission will be further described below with reference to examples. Example 1 The following Tables 1 and 2 show the formulations of the sealant compositions of the present invention and comparative products.

[0029]

[Table 1]

In Table 1, the UV-curable resin composition is Ubicoat 60 (manufactured by Nippon Paint Co., Ltd.), the adhesive agent for adhesion is 1,6-hexamethylene diisocyanate, and the pigment is talc: barium sulfate: Carbon black =
It is a 10: 10: 1 (mass ratio) adjusted product.

[0031]

[Table 2]

In Table 2, the compounding ratio of the thermal expansion material is the ratio of the outer part to the product 2 of the present invention in Table 1. In addition, a heat-expandable microcapsule was used as the heat-expanding material.

Next, the sealant composition of the present invention and the comparative product shown in Tables 1 and 2 above was applied to a cosmetic SPCC substrate [trade name: Silver Top: Toyo Steel Co., Ltd .: [1 mm] to a film thickness of 80 μm, and the coating film was cured with an ultraviolet irradiation device. Various characteristics were evaluated about the obtained coating film. The conventional product 1 is a type in which a paper gasket is adhered to the front and back of an iron plate. The conventional product 2 is obtained by printing a thermosetting resin in a predetermined pattern on both surfaces of the iron plate by screen printing, drying the solvent, and then heating. It is obtained by processing. The results obtained are described in Tables 3 and 4.

[0034]

[Table 3]

[0035]

[Table 4]

In Tables 3 and 4, the pencil hardness is JIS K5
400 Pencil scratch value conforming to 8.4.3 Pencil scribing method, and the cross cut test is based on JIS K5400
The value is based on the cross-cut tape method of 8.5.3, the numerical value represents a point, and the air sealability is 11.8 MPa, inner pressure 0.05 M by air sealability differential pressure detection method.
It is a result measured in Pa (unit: cc / min).

Example 2 A cosmetic SPCC substrate [in the same manner as in Example 1 except that the thickness of the cured layer was changed to the thickness shown in Table 5 using the product 2 of the present invention shown in Table 1, (Trade name: Silver Top: manufactured by Toyo Steel Co., Ltd .: thickness: 1 mm). Various characteristics were evaluated about the obtained coating film. Table 6 shows the obtained results.

[0038]

[Table 5]

[0039]

[Table 6]

[0040]

EFFECTS OF THE INVENTION By using the sealant composition of the present invention, excellent sealing properties are obtained as compared with conventional paper gasket adhesive products and a separate plate for a control valve in an automatic transmission using a thermosetting resin. A separate plate for a control valve in an automatic transmission having a close contact with a core material can be manufactured at low cost. In addition, compared to thermosetting resins, the sealant composition of the present invention has less environmental load because no organic solvent is scattered in the curing step. Furthermore,
The wear resistance to hydraulic pressure is also better than a separate plate for a control valve in an automatic transmission using a paper gasket adhesive or a thermosetting resin.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 5/29 C08K 5/29 C08L 101/00 C08L 101/00 // F16H 57/02 302 F16H 57/02 302F (72) Inventor Tomoki Niijima 1488 Kawadaimon-cho, Nishi-Yatsushiro-gun, Yamanashi Prefecture F-term in Askeknica Co., Ltd. CF221 CF271 CK021 DA028 ER006 FA082 FB288 FD097 FD146 FD322 FD328 GJ02

Claims (7)

[Claims] 1. A sealant composition comprising 40 to 97% by mass of an ultraviolet curable resin composition, 2 to 20% by mass of an adhesive agent for adhesion, and 1 to 40% by mass of a pigment. 2. The ultraviolet curable resin in the ultraviolet curable resin composition is a radical polymerization type ultraviolet curable resin.
The sealant composition as described in the above. 3. The adhesive curing agent is a monoisocyanate,
3. The sealant composition according to claim 1, comprising one or more selected from the group consisting of diisocyanates and triisocyanates. 4. The sealant composition according to claim 1, wherein the pigment is an organic pigment or an inorganic pigment. 5. The sealant composition according to claim 1, which further comprises a thermal expansion material in an amount of 0.2 to 20% by mass. 6. A separate plate for a control valve in an automatic transmission according to claim 1, wherein the separate plate is provided at a predetermined position on at least one surface of the separate plate.
A separate plate for a control valve in an automatic transmission, comprising a seal portion comprising a cured layer of the sealant composition according to any one of the preceding claims. 7. The cured layer of the sealant composition has a thickness of 20 to 20.
The separate plate for a control valve in an automatic transmission according to claim 6, which is 150 µm.