WO2000007789A1

WO2000007789A1 - Pellet for vibration-control resin molding

Info

Publication number: WO2000007789A1
Application number: PCT/JP1998/003543
Authority: WO
Inventors: Yasuyuki Ohira; Mitsuo Hori
Original assignee: Shishiai-Kabushikigaisha
Priority date: 1998-08-07
Filing date: 1998-08-07
Publication date: 2000-02-17

Abstract

A pellet for vibration-control resin molding capable of absorbing and damping vibration propagating through, or occurring from, machinery, appliances, structures, etc., when applied as a molding material of a structural material of automobiles, home electric appliances, electronic equipment, precision instruments, communication equipment, office automation equipment, building machinery, construction structures, and various other machinery, appliances and structures, characterized in that an active component for increasing a dipole moment in a base resin and an inorganic filler are blended into the base resin.

Description

I ^ Itoda »Bellet for damping resin moldings Technical field The present invention relates to automobiles, home appliances, electronic equipment, precision equipment, communication equipment, OA equipment, construction machinery, civil engineering buildings, various other machines, A system that can be applied as a molding material for components of equipment and structures, propagates to the machines, equipment, structures, etc., or absorbs and attenuates vibrations generated from machines, equipment, structures, etc. The present invention relates to a pellet for a vibrating resin molded product. BACKGROUND ART In recent years, the vibrations generated by automobiles, which are indispensable for social life, and the noise caused by the vibrations, have become a major social issue. It became so. On the other hand, many drivers and passengers demand the quietness and comfort in cars by preventing the generation of noise in the car and the noise caused by the vibration. 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 an increasing need for vibration-reducing products for industrial machinery and equipment that are sources of vibration, or for electronic equipment, precision equipment, home appliances, OA equipment, and communication equipment that are easily affected by vibration. ing. Conventionally, in order to respond to such demands, automobiles, home appliances, electronic equipment, precision equipment, OA equipment, communication equipment, construction machinery, civil engineering buildings, various other machines, equipment, and structures have been used as vibration countermeasures. The material (vibration damping material) that has viscoelastic properties such as rubber, plastic, and asphalt is cut or bent according to the size and shape of the application location of the machine, equipment, structure, etc. It was processed and affixed to the application area, and propagated to the machine, equipment, structure, etc., or absorbed and attenuated by vibration generated from the machine, equipment, structure, etc. However, the process of cutting and bending the damping material according to the size and shape of the application location is very complicated, and the work of attaching the vibration damping material to the application location has not been easy. The present invention has been made in view of such technical problems, and includes automobiles, home appliances, precision equipment, electronic equipment, OA equipment, communication equipment, construction machinery, civil engineering buildings, other various machines, equipment, It is applied as a molding material for structural materials such as structures, and can absorb and attenuate vibrations that propagate to the machines, equipment, structures, etc., or are generated from machines, equipment, structures, etc. It is intended to provide a belt for vibration-damping resin molded products that can be cut or bent according to the size or shape, and does not need to be attached to the application location. is there. Disclosure of the invention

The pellets for vibration-damping resin moldings of the present invention (hereinafter simply referred to as pellets) include automobiles, home appliances, electronic equipment, precision equipment, OA equipment, communication equipment, construction machinery, civil engineering buildings, various other machines, Components of equipment and structures, such as car interiors and dashboards, electric washing machines and refrigerators, video cameras and recorders, copiers and printers, telephone casings, partition walls, gears and pulleys, and other components It is applied as a molding material for such applications. The shape, size, manufacturing method, and the like of the pellet are completely arbitrary. example For example, a composition comprising a base resin, an active ingredient, and an inorganic filler, which will be described later, is extruded by an extruder and then formed into a round shape by a strand cutting method or a hot cutting method, or a sheet of the composition The shape, size, and manufacturing method of the pellet, such as the shape of the pellet, which is cut into a square shape, and the manufacturing method, are based on the type, size, It is better to determine as appropriate in consideration of the shape, use condition, etc. The pellet of the present invention is characterized in that an active ingredient for increasing the amount of dipole moment in the base resin and an inorganic filler are blended in the base resin. Base resins include, for example, polyvinyl chloride, polyethylene, chlorinated polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polymethyl methacrylate, polyvinylidene fluoride, polyisoprene, polystyrene, styrene-butadiene Lilonitrile copolymer (ABS resin), styrene-acrylonitrile copolymer (AS resin), acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), butadiene rubber (BR ), Natural rubber (NR), and isoprene rubber (IR), or a mixture thereof. Among them, polyvinyl chloride is preferred because it has good moldability and is inexpensive. The present inventors have elucidated a new mechanism for absorbing and damping vibration energy through research on damping materials. The mechanism is as follows. That is, FIG. 1 shows an arrangement state of the dipoles 12 inside the base resin 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, when vibration energy is transmitted to this, the dipoles 12 existing inside the base resin 11 are displaced, and as shown in FIG. 2, each dipole inside the base resin 11 is displaced. The child 1 2 will be placed in an unstable state, and each dipole 1 2 will try to return to a stable state as shown in FIG. At this time, energy is consumed. It is considered that the vibration energy is absorbed through the displacement of the dipole inside the base resin 11 and the energy consumption due to the restoring action of the dipole. From the vibration damping mechanism, as the amount of dipole moment inside the base resin 11 as shown in FIGS. 1 and 2 increases, the damping property of the base resin 11 increases. Therefore, it is very useful to use a resin with a large amount of dipole moment inside the molecule as a base resin to secure higher vibrational energy absorption performance. . When selecting the base resin, in addition to the magnitude of the dipole moment inside the molecule, the type, use form, size, shape, and handling of the component to which the beret is applied as a molding material It is also desirable to consider the properties, moldability, availability, temperature performance (heat resistance and cold resistance), weather resistance, and price. The active component is a component that dramatically increases the amount of dipole moment in the base resin. The active component itself has a large amount of dipole moment, or the dipole moment of the active component itself. Although the amount is small, it refers to a component that can dramatically increase the amount of dipole moment in the base resin when the active component is blended. N, N-dicyclohexylbenzothiazyl-1-sulfenamide (DCHB SA), 2_mercaptobenzothiazol (MBT), dibenzothiazyl sulfide (MBTS), N-six hexinolebenzobenzothiazyl-1- Snorrefenamide (CBS), N-tert-butylbenzothiazirulu-2-sulfenamide (BBS), N-oxyjetj Lembenzothiazyl-1 Surufen'ami de (OB S), N, N- diisopropyl Rubenzochiajiru compound containing a benzothiazyl group such as single 2- Surufen'ami de (DPB S), Benzotriazole having an azole group bonded to the benzene ring is used as the mother nucleus, and a phenyl group is bonded to the nucleus. 2- {2'-one-sided oxy-3 '-(3 ", A", 5 ", 6 "Tetrahydrofltarimidemethyl) — 5 '—methylphenyl} benzotriazole (2 HP MM B), 2- {2' —Hydroxoxy 5 '—methylphenyl} —benzotriazole (2HMP B ), 2-{2 '—Hydrox 1-3'-t-butynole 5' —Methylpheninole} 1-5 _Chlorobenzozotriazole (2HBMP CB), 2— {2 '—Hydroxy-1 3' , 5'-Di-t-butylphenyl} -15-chlorobenzotriazole (2HDB PCB) and other compounds with a benzotriazoyl group, ethyl 2-cyano-1,3,3-diphenyl phenyl One or more selected from compounds containing a diphenyl acrylate group such as It can be mentioned. Some resins are benzophenones such as 2-hide mouth 4-methoxybenzophenone (HMBP), 2-no, hydroxy-4-hydroxybenzophenone-5-sulfonic acid (HM BPS) One or more compounds selected from compounds having a group can be exemplified. The amount of the dipole moment in the above-mentioned active ingredient is variously different depending on the type of the active ingredient, similarly to the amount of the dipole moment in the base resin. Even when the same active component is used, the amount of dipole moment generated in the base resin changes depending on the temperature when vibration energy is applied. The amount of dipole moment also changes depending on the magnitude of the vibrational energy applied to the base resin. For this reason, it is desirable to select and use the active ingredient that gives the largest amount of dipole moment in consideration of the temperature and energy at the time of application. In determining the active ingredient to be added to the base resin, the active ingredient and the base tree Considering the easiness of compatibility with fats, that is, SP value, it is good to select one having a value close to that value. Desirably, it is contained in a proportion of 0 parts by weight. That is, if the amount of the active ingredient is less than 10, the sufficient effect of dramatically increasing the amount of the dipole moment in the base resin cannot be obtained, and the amount of the active ingredient is not more than 200. If the amount exceeds the above, even if the blending amount is increased, an increase in the amount of dipole moment by the increased amount cannot be expected, and in addition, there is a risk of causing a problem that the formability is deteriorated. When two or more kinds of the above active ingredients are blended, at least two kinds of active ingredients having different glass transition points may be blended into the base resin to extend the temperature range where the vibration absorbing performance is exhibited. It is possible. Examples include the combination of DCHBSA and 2 HP MMB when ABS resin is used as the base resin, and the combination of DCHBSA, 2 HP MMB and ECDPA when using polyvinyl chloride as the base resin. Can be. Examples of the inorganic filler include My rye scales, glass flakes, glass fiber, glass fiber, calcium carbonate, barite, and precipitated barium sulfate. These inorganic fillers are filled for the purpose of further improving the vibration absorbing performance. The inorganic filler is preferably contained in a proportion of 100 to 100 parts by weight with respect to 100 parts by weight of the base resin. For example, when the filling amount of the inorganic filler is less than 10, even if the filling of the inorganic filler is not sufficiently improved, the vibration absorbing performance is not improved. Even if the amount exceeds the above range, adverse effects may be caused if the material cannot be actually filled, or if the mechanical strength of the pellet or the constituent material formed using the pellet as a molding material is reduced. As described above, when a base material containing an active ingredient and an inorganic filler in a base resin is used as a molding material to form a constituent material, a bipolar material in the constituent material (base resin) is used. The amount of sub-moment is dramatically increased, and the component (base resin) exhibits excellent vibration energy absorption performance. In addition, in addition to the above components, an antioxidant, a reinforcing agent / a reinforcing agent, an antistatic agent, a flame retardant, a lubricant, a foaming agent, a coloring agent, and the like can be added to the pellet, if necessary. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a dipole in the base resin: FIG. 2 is a schematic diagram showing a state of the dipole in the base resin when vibration energy is applied. FIG. 3 is a schematic diagram showing a state of a dipole in the base resin when an active ingredient is blended. FIG. 4 is a graph showing the mechanical properties E ″ (dyne / cm ² ) at each temperature under a frequency of 110 Hz for the samples of Examples 1 to 3 and Comparative Examples 1 to 4.

Example

ABS resin (Sumika A & L Co., Ltd., GA-704) is used as a base resin, and CBS (Sanshin Chemical Industry Co., Ltd., CM Sancera I) is used as an active ingredient. Kuraray Co., Ltd., 60 C) and calcium carbonate (Maruo Calcium Co., Ltd., heavy coal) were charged into a pelletizer at the mixing ratio shown in Table 1 below, extruded, and then extruded using a strand method. A round pellet with a length of 3 mm was produced.

(Hereinafter the margin) (weight%)

Next, each of the obtained pellets is put into a molding machine, and formed into a sheet having a thickness of l mm. Pulled. FIG. 4 shows the mechanical properties E "(loss elastic modulus) at each temperature under the frequency of 11 OHz for each of the samples according to Example 13 and Comparative Example 14 described above. The loss elastic modulus was measured using a dynamic viscoelasticity measurement test device (Leovive DDV-25FP, manufactured by Orientec Co., Ltd.). Each of the samples according to Example 13 and Comparative Example 14 used an ABS resin having a glass transition point in the range of about 110 ° C to 120 ° C as the base resin. You. From Fig. 4, it can be seen that the values of E "of Comparative Examples 1 to 4 increase as the filling force of My force and calcium carbonate increase. However, those peaks reach about 110 ° C. It is in the range of up to ¹²⁰ C. The temperature range (practical temperature range) when applied as a component material in each of the above-mentioned fields is in the range of about —5 ° C to 60 ° C. E in Comparative Examples 1 to 4 are all low and none of them have a sufficient damping effect. (If additives such as DOP were added to Comparative Examples 1 to 4, their peak values were measured at practical temperatures. Even if it is lowered to the range, the value of E "is expected to be significantly lower than the value of the non-added one.) On the other hand, when looking at the peaks of the samples according to Examples 1 to 3, All of them are in the practical temperature range, and their numerical values are the same as those of Comparative Examples 2 to 4. Each of the samples according to Examples 1 to 3 had CBS added, and their peak values were significantly lower, although their peak values were originally expected to drop significantly. From this, it can be seen that the additive (active ingredient) called CBS has a significant effect on the vibration damping performance of each of the samples according to Examples 1 to 3.

Claims

Range of begging

1. A vibration-damping resin molding compound characterized in that an active ingredient that increases the amount of dipole moment in the same resin and an inorganic filler are blended in the base resin.

2. The base resin is polyvinyl chloride, polyethylene, chlorinated polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polymethyl methacrylate, polyvinylidene fluoride, polyisoprene, polystyrene, styrene-butadiene monoester. Acrylonitrile copolymer (ABS resin), styrene-acrylonitrile copolymer

One selected from (AS resin), acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), butadiene rubber (BR), natural rubber (NR), isoprene rubber (IR) 3. The pellet for a vibration-damping resin molded product according to claim 1, wherein the pellet is a mixture of:

3. The pellet for vibration damping resin molding according to claim 1, wherein the active ingredient is contained in a proportion of 10 to 200 parts by weight with respect to 100 parts by weight of the base resin.

4. The pellet for a vibration-damping resin molded product according to claim 1, wherein the active ingredient is one or more selected from compounds containing a benzothiazyl group.

5. The pellet for vibration damping resin molding according to claim 1, wherein the active ingredient is one or more selected from compounds having a benzotriazole group.

6. The active ingredient is selected from compounds having a diphenyl atalylate group 4. The vibration-damping resin molding belt according to claim 1, wherein the vibration-absorbing resin molding is one or more kinds.

7. The belt for vibration damping resin molding according to claim 1 or 3, wherein the active ingredient is one or more selected from compounds having a benzophenone group. .

8. The pellet for vibration damping resin molding according to claim 1, wherein the inorganic filler is contained in a proportion of 100 to 100 parts by weight with respect to 100 parts by weight of the base resin. Uru :;

9. The pellet for molding a vibration damping resin according to claim 1, wherein the inorganic filler is mica flake and calcium carbonate.