WO2000012646A1

WO2000012646A1 - Damping fluid composition

Info

Publication number: WO2000012646A1
Application number: PCT/JP1998/003910
Authority: WO
Inventors: Yasuyuki Ohira; Mitsuo Hori
Original assignee: Shishiai-Kabushikigaisha
Priority date: 1998-08-31
Filing date: 1998-08-31
Publication date: 2000-03-09

Abstract

A damping fluid composition capable of being applied in combination with a viscoelastic material capable of drastically improving the damping performance of a damping fluid, sufficiently cutting off the propagation of vibration and noise, and exhibiting fully a vibration-proofing effect, characterized by containing an active component for increasing the dipole moment in the damping fluid.

Description

Itoda Vibration damping liquid composition Technical field The present invention is applied to seismic isolation liquids in seismic isolation devices installed in high-rise buildings and the like, and is applied to the automobile engines and building structures. The present invention relates to a vibration damping liquid composition capable of absorbing and attenuating vibration generated from an automobile engine or a building structure. In recent years, vibration generated by automobiles, which are indispensable for social life, and the noise caused by the vibration have come to the fore as social problems, and in the process of stricter legal regulations, measures to prevent the occurrence are strongly required. I was able to. On the other hand, many drivers and passengers demand quietness and comfort in cars by preventing the generation of vibrations and noise caused by the vibrations. Also, with regard to structures such as factories, houses, schools, etc., due to the spread of the idea of aiming for a more comfortable life, damage due to vibration and noise from outside the structure, and noise due to vibration and vibration generated inside the structure The damage caused by the spread of the garbage to the outside has been reported, and countermeasures are required. In addition, there is a growing need for users of vibration-producing industrial machinery and equipment, as well as electronic equipment, precision equipment, and home appliances that are easily affected by vibration. Conventionally, to meet such demands, automobiles, home appliances, precision equipment, construction machinery For civil engineering buildings, various other machines, devices, structures, etc., as a measure against vibration, a material having viscoelastic properties such as rubber is applied to the machines, devices, structures, etc. It absorbs and attenuates vibrations that propagate to structures, or from machines, equipment, and structures. However, in some fields, such as engine mounts for automobiles and seismic isolation devices for building structures, the use (improvement) of rubber and other materials with viscoelastic properties alone can provide sufficient vibration and noise. The effects of blocking transmission and seismic isolation could not be expected. Therefore, in these fields, the use of a material having viscoelastic properties together with a liquid such as ethylene daryl (hereinafter referred to as a vibration damping liquid) was used to achieve higher performance and meet the demands in the relevant fields. In the course of research on more effective vibration countermeasures, the present inventors focused on a vibration damping liquid used in combination with a material having viscoelastic properties, and aimed at improving the vibration damping performance of the vibration damping liquid itself. As a result of intensive research, the present invention has been completed. That is, the present invention relates to a vibration damping liquid composition which can be used in combination with a material having viscoelastic properties, and by dramatically improving the vibration damping performance of the vibration damping liquid, for example, an engine mount for a vehicle ゃ a building structure It is an object of the present invention to provide a vibration damping liquid composition capable of exerting sufficient vibration, blocking noise propagation, and exerting a seismic isolation effect when applied to fields such as seismic isolation devices. Disclosure of the invention

The vibration damping liquid composition of the present invention (hereinafter, simply referred to as a composition) is characterized in that the vibration damping liquid contains an active component that increases the amount of dipole moment in the vibration damping liquid. The vibration damping solution in the composition of the present invention uses water, alcohols, or one selected from daricols or a mixture thereof. Can be. It should be noted that which of the above-mentioned vibration damping liquids is used may be appropriately determined according to the field of application, the application state, and the like. Next, the relationship between the dipole moment amount and the vibration damping performance will be described. FIG. 1 shows the arrangement of the dipoles 12 inside the vibration damping liquid 11 before the vibration energy is transmitted. It can be said that the arrangement state of the dipoles 12 is in a stable state. However, the transmission of the vibration energy causes displacement of the dipoles 12 existing inside the vibration damping liquid 11, and as shown in FIG. 2, each dipole 1 2 inside the vibration damping liquid 11 1 It will be placed in an unstable state, and each dipole 1 2 will try to return to a stable state as shown in Figure 1. At this time, energy is consumed. It is considered that the vibration energy is absorbed through the displacement of the dipole inside the vibration damping liquid 11 and the energy consumption by the restoring action of the dipole. The displacement of the dipoles 12 means that the dipoles 12 in the vibration damping liquid 11 rotate or shift in phase. From the mechanism of such vibration damping, as the amount of dipole moment inside the vibration damping liquid 11 as shown in FIGS. 1 and 2 increases, the damping property of the vibration damping liquid 11 increases. It is considered to be. From this, it is very useful to use a vibration damping liquid with a large amount of dipole moment in the vibration damping liquid to obtain higher vibration damping performance. In addition, when applying this composition, the vibration damping performance (vibration) at the temperature at which the machine or equipment to which the composition is applied is used (hereinafter referred to as the operating temperature range; specifically, 20 to 40 ° C.) Ensuring the maximum performance of energy absorption is one of the important factors. When selecting the vibration damping liquid, the application field, application state, In addition to the amount of dipole moment in the composition and the operating temperature range of the composition, it is desirable to consider handling, availability, temperature performance (heat resistance and cold resistance), weather resistance, price, etc.

Next, the active ingredient will be described. The active component is a component that dramatically increases the amount of the dipole moment in the vibration damping liquid.The active component itself has a large dipole moment, or the active component itself has a small dipole moment. However, it refers to a component capable of dramatically increasing the amount of dipole moment in the vibration damping liquid by blending the active component.

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For example, the amount of the dipole moment generated in the vibration damping liquid 11 under the predetermined temperature condition and the magnitude of the vibration energy can be reduced by mixing the active ingredient with the vibration damping liquid 11, as shown in Fig. 3. Thus, the power is increased by a factor of three, and by a factor of ten. Along with this, the energy consumption due to the dipole restoration operation when the vibration energy is transmitted will increase dramatically, and it is thought that the vibration damping performance far exceeds the predicted.

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Examples of active ingredients that induce such effects include N, N-dicyclohexylbenzothiazyl-2-sulfenamide (DCHBSA), 2-mercaptobenzothiazole (MBT), and dibenzothiazyl sulfide (MBT). MB TS), N-cyclohexenylbenzobenzothiazyl-1-sulfenamide (CBS), N-tert-butyl benzothiazilyl 2-sulfenamide (BBS), N-oxyzetene lenvenothiazilyl 2-sulfenamide (OB S), N, N-diisopropyl / lebenzothiazide / le2-sulfenamide (DPBS) and other compounds containing a benzothiazyl group, benzotriazole with an azole group bonded to the benzene ring, and a phenyl group bonded to this 2— {2 '—Hide mouth xy 3' ― (3 ", 4", 5 ", 6 tetrahidrophthalide midemethyl) 1 5'-Methyl D two Le} one base Nzotoria Zole (2 HPMMB), 2- {2'-Hydrox-5'-Methylphenyl} -Benzotriazol (2HMPB), 2- {2'-Hydrox3--3'-t -Pin, Chinole 5 '—Methinorefuenole} — 5—Black benzotriazonole (2 HBMP CB), 2-{2 一 Hide mouth xi 3', 5 '—Gee ― Compounds having a benzotriazole group, such as benzotriazole (2 HDBPCB), and diphenylacrylate groups, such as ethyl 2-cyano-1,3,3-diphenyl acrylate Some compounds, such as 2-hydroxyl 4-methoxybenzophenone (HMBP) and 2-hydroxyl-4-methoxybenzophenone-15-sulfonic acid (HMBPS) One or more compounds selected from compounds having a benzophenone group may be mentioned. That. The mixing amount of the above-mentioned active ingredient is preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the vibration damping liquid. For example, if the amount of the active ingredient is less than 0.1 part by weight, the effect of adding the active ingredient to increase the amount of the dipole moment cannot be obtained, and the amount of the active ingredient is not more than 10 parts. When the amount exceeds the parts by weight, the amount of the dipole moment may not increase even though the active ingredient is added in an amount exceeding the B parts by weight. In determining the active component to be mixed in the vibration damping liquid, it is good to consider the easiness of compatibility between the active component and the components constituting the vibration damping liquid. The active ingredient is not limited to one kind, and two or more kinds can be mixed. The amount of the dipole moment varies depending on the type of the vibration damping liquid and the active component. Also, even if the same vibration damping liquid or active component is used, the amount of dipole moment varies depending on the temperature at which the vibration energy is transmitted. Ma 0 The amount of dipole moment varies depending on the magnitude of the transmitted vibrational energy. For this reason, considering the temperature and the magnitude of vibration energy when applying the composition, it is necessary to select and use the vibration damping liquid and the active component so that the largest dipole moment is obtained at that time. Is desirable. Further, in addition to the active ingredient, an antioxidant, an anti-deterioration agent, a coloring agent, and the like can be added to the vibration damping liquid as required. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a dipole in a vibration damping liquid. Figure 2 is a schematic diagram showing the state of the dipole in the vibration damping liquid when vibration energy is applied. FIG. 3 is a schematic diagram showing a state of a dipole in a vibration damping liquid when an active ingredient is blended. FIG. 4 is a graph showing the elastic tangent (ta η δ) of each of the compositions of Examples 1 to 4 and Comparative Examples 1 and 2 at 20 ° C. and 30 Hz. Example 3% by weight of each of ethylene glycol (EG) and DC EBSA (Example 1), 2 HPMMB (Example 2), MBTS (Example 3) and HMPS (Example 4) as active ingredients were added. And a vibration damping liquid composition was prepared. For comparison, an EG solution containing no active ingredient alone (Comparative Example 1) and a EG solution mixed with 3% by weight of DOP (Comparative Example 2) were prepared. The elastic tangent (taηδ) at 20 ° C and 30 Hz was measured for each of the above vibration damping liquid compositions. The vibration damping performance was evaluated. Fig. 4 shows the results. In addition, the measurement of the elastic tangent (tan δ) was performed using Leo Vibron, DDV-25FP (manufactured by Orientetech Co., Ltd.). From FIG. 4, it can be seen that the products of Examples 1 and 2 are almost the same as those of Comparative Examples 1 and 2, but the product of Example 3 is about twice as large and the product of Example 4 is about twice. At 10 times the level, it can be seen that the performance has been dramatically improved.

Claims

Scope of word blue

1. A vibration damping liquid composition characterized in that the vibration damping liquid contains an active ingredient that increases the amount of dipole moment in the vibration damping liquid.

2. The vibration damping liquid composition according to claim 1, wherein the vibration damping liquid is at least one selected from water, alcohols, and glycolide, or a mixture thereof.

3. The vibration damping liquid composition according to claim 1, wherein the active ingredient is at least one selected from compounds containing a benzothiazyl group.

4. The vibration damping liquid composition according to claim 1, wherein the active ingredient is one or more selected from compounds having a benzotriazole group.

5. The vibration damping liquid composition according to claim 1, wherein the active ingredient is one or more selected from compounds having a diphenyl atalylate group.

6. The vibration damping liquid composition according to claim 1, wherein the active ingredient is at least one compound selected from compounds having a benzofuunone group.

7. The vibration according to any one of claims 1 to 6, wherein the active ingredient is contained in a ratio of 0.1 to 10 parts by weight with respect to 100 parts by weight of the vibration damping liquid. Attenuating liquid composition.