JP2002031179A - Stabilizer bushing for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stabilizer bushing capable of vulcanization adhesion (co-crosslinking) to the body rubber section of a slide rubber section by filling the slide rubber section even when the vulcanization of the body rubber section has almost completed. SOLUTION: This stabilizer bushing for vehicle is provided with the body rubber section formed of a vulcanized first rubber compound substance and the slide rubber section formed of a second rubber compound substance containing vulcanized lubricant inside the body rubber section. The first rubber compound substance satisfies such requirement as t90(90% vulcanization time) -t50-(50% vulcanization time)>=1.5 min. in a vulcanization property (JIS K 6300: curastometer and also contains a crosslinkable adhesive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stabilizer bush for a vehicle made entirely of rubber and having a sliding surface on the inner peripheral surface, and more particularly to a stabilizer bush for an automobile suspension suitable for attaching to a vehicle body or a suspension. It is. The present invention can be applied to a rubber laminate having a sliding rubber portion other than the stabilizer bush.

[0002]

BACKGROUND ART A conventional stabilizer bush 12 for a vehicle.
Has the configuration shown in FIG. 1, for example (see Japanese Utility Model Laid-Open No. 60-180615).

Basically, an inner peripheral surface 14 and an outer peripheral surface 16
(U-shaped peripheral surface 16a and flat surface 16 closing the upper end of the opening
b. ). Both ends of the U-shaped peripheral surface 16a in the axial direction of the cylindrical body are provided with a flange portion 18 and a split portion (cut portion) 20 for inserting the stabilizer bar 19 inside.

[0004] The mounting of the bush 12 to the vehicle body
After being fitted to the stabilizer bar 19 in the inner space of the bush 12 via the split portion 20, it is attached via the bracket 22. That is, the U-shaped holding portion 2 of the bracket 22
The U-shaped peripheral surface 18a of the bush 12 is held by 2a, and a vehicle body (not shown) or the like is screwed through the screw holes 22c of the mounting seats 22b at both ends of the U-shaped holding portion 22.

[0005] It has been found that reducing the torsional torque of the stabilizer bar 19 held by the bush 12 when receiving the torsional action has an effect on the riding comfort of the vehicle. For this reason, as a known technique for reducing the torsional torque of the stabilizer bar 19, there is a bush in which the inner peripheral surface side is formed of a resin layer having a high slidability (a low friction coefficient) (Japanese Patent Application Laid-Open No. Sho 63). -57310 ・ 573
No. 11).

However, in the bush in which the inner peripheral surface is formed by the resin layer, the resin material has a higher rigidity (elastic modulus) than the rubber material, so that the elastic modulus (spring constant) of the entire bush is set to a predetermined value or less. It becomes difficult to do. On the other hand, if the elastic part (spring constant) of the entire bush is set to be equal to or less than a predetermined value and the rubber portion is made of a soft material, the durability is reduced.

For this reason, in Japanese Patent Application Laid-Open No. Hei 10-82441, a stabilizer bar 1 is provided inside a main rubber portion (base rubber) 26 forming an outer peripheral surface side as shown in FIG.
A bush 12 </ b> A having a configuration in which a sliding rubber portion (high slidability rubber) 24 that comes into contact with the bearing 9 is formed.

[0008] The bush 12A having the above structure is usually manufactured by using an injection mold as shown in FIG.

First, a rubber material (first rubber compound) for a main rubber portion is injected into a main rubber portion cavity 32 formed by a first upper mold 28 and a lower mold 30 by a first material. Injection molding is performed via a path 34. With the vulcanization of the main rubber part 26 advanced to some extent, the first upper die 28 is replaced with the second upper die 36, and the sliding rubber part is formed in the sliding rubber part cavity 38 formed inside the main rubber part 26. The rubber material for use (second rubber compound) is injection molded through the second material injection passage 40. Then, when the vulcanization of the sliding rubber portion 24 together with the main rubber portion 26 is completed, the mold is opened and the bush (molded body) is taken out (released).

At this time, the injection time of the second rubber compound is
If the vulcanization of the main rubber portion 26 is excessively advanced (for example, 9
0% vulcanization) and vulcanization bonding (co-crosslinking: simultaneous vulcanization) between the main rubber portion 26 and the sliding rubber portion 24 could not be sufficiently performed. Here, “co-crosslinking (co-vulcanization)” refers to cross-linking between different rubber phases, and “co-crosslinking agent” refers to a vulcanizing agent added to improve the “co-crosslinking property”. Say.

If the injection time of the second rubber compound is set earlier (50% vulcanization time) than the injection time of the first rubber compound, a sufficient vulcanization adhesive strength can be ensured. 26 is insufficiently vulcanized and lacks the shape stability of the main rubber portion 26 and is not practical. In other words, the injection pressure of the sliding rubber portion material causes the main rubber portion 26 to be compressed or the sliding rubber portion material to enter the gap between the main rubber portion 26 and the molds 30 and 36. Molding defects are likely to occur.

In view of the above, according to the present invention, even when the injection of the sliding rubber portion is substantially completed (90% or more vulcanization) of the vulcanization of the main rubber portion, the sliding rubber portion can be in contact with the main rubber portion. An object of the present invention is to provide a stabilizer bush that can be vulcanized and bonded and a method for manufacturing the same.

[0013]

SUMMARY OF THE INVENTION A stabilizer bush according to the present invention comprises:
The above object (object) is achieved by the following constitution.

A main rubber portion molded with a sulfur-vulcanized first rubber compound and a sliding rubber portion molded inside the main rubber portion with a second rubber compound containing a sulfur-vulcanized lubricant a stabilizer bushing with bets, first rubber formulation, vulcanization characteristics (JIS K 6300: Curelastometer) at, t ₉₀ (between 90% vulcanization) -t ₅₀ (between 50% vulcanization) ≧
It is characterized by satisfying the requirement of 1.5 min and containing a crosslinkable pressure-sensitive adhesive. With this configuration,
As shown in the test examples described later, the molding time of the sliding rubber portion even after t ₉₀ the course of the elastic body, it is possible to ensure a sufficient adhesive strength of the sliding rubber portion with respect to the elastic body.

[0015] Increasing the t ₉₀ -t _50, why vulcanization against vulcanized rubber is improved is unclear. This is because it was common knowledge in the art that the adhesive strength of the unvulcanized rubber to the same type of vulcanized rubber hardly depends on the vulcanization history of the vulcanized rubber. The vulcanized adhesive strength (9
(0 ° peel strength) is also not known to those skilled in the art. In other words, the adhesive is originally mixed for improving the kneadability (roll adhesion) during rubber kneading and the adhesiveness of the dough. After vulcanization, most of the adhesive is in a crosslinked structure (vulcanized network). And a low molecular weight compound having a low T _g (glass transition point). In a softening point temperature atmosphere (for example, at 80 ° C. in a test example described later), almost no increase in vulcanization adhesive strength occurs. It was common knowledge in the art to make no contribution.

Here, the crosslinkable pressure-sensitive adhesive (tackifier: tackifier) is preferably a phenol formaldehyde resin or a phenol polysulfide resin. Phenol formaldehyde resin is also used as a crosslinking agent for diene rubber, and is presumed to act as a co-crosslinking agent between the main rubber portion and the sliding rubber portion. In the phenol polysulfide resin, the release of sulfur is suppressed to near the completion of vulcanization, and it is assumed that the phenol polysulfide resin also functions as a co-crosslinking agent.

NR as a rubber polymer in the first rubber compound
When a system rubber is used, an alkylphenol polysulfide (adhesive) is used as the phenol polysulfide resin, and its compounding amount is usually 0.25 to 5
phr.

The alkylphenols from the base as the phenol is from the standpoint of compatibility with NR-based rubber, is a weight sensitive adhesive formulation is too small, the sliding rubber portion with respect to the elastic body in the T ₉₀ after the invention It is difficult to obtain the vulcanized adhesive strength, and if the amount of the adhesive is too large, the vulcanized adhesive strength (rubber strength) is rather lowered and the compression set is adversely affected.

In each of the above structures, the rubber polymer in the first rubber compound and the second rubber compound is N
In the case of R-based, the vulcanization accelerator in the first rubber compound is usually a benzothiazole sulfide compound.
This is because the vulcanization curve can be easily controlled.

The construction of the method for manufacturing the vehicle stabilizer bush of the present invention is as follows.

After molding the main rubber portion with the sulfur-vulcanized first rubber compound, a sliding rubber portion is formed inside the main rubber portion with the sulfur-vulcanized second rubber compound, and the main rubber portion is formed. in the production method of the stabilizer bush it is produced by co-crosslinking the sliding rubber part for, as the first rubber compound, vulcanization properties (JIS K 6300: Curelastometer) at, t ₉₀ (between 90% vulcanization time) −t ₅₀ (50% vulcanization time) ≧
It is characterized by using one that satisfies the requirement of 1.5 min and contains a crosslinkable pressure-sensitive adhesive.

The desirable form of the first rubber compound is the same as that of the above-mentioned vehicle stabilizer.

[0023]

[Detailed Description of Structure] Next, each structure of the present invention will be described in detail.

(1) The bush of the present invention comprises a main rubber portion molded with a sulfur-vulcanized first rubber compound and a second rubber compound containing a sulfur-vulcanized lubricant. And a sliding rubber portion molded inside.

The sulfur vulcanization system is different from the peroxide vulcanization system, which is another general vulcanization system, in tensile strength, tear strength,
This is because it is easy to obtain a vulcanizate having excellent mechanical properties such as elongation and bending. In addition, peroxide has a low crosslinking efficiency with respect to NR which is desirable as a rubber polymer.

The rubber polymer used in the first rubber compound and the second rubber compound is not particularly limited as long as it has predetermined mechanical strength, hardness and vibration absorption and can be sulfur-vulcanized.

Specifically, natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), styrene butadiene rubber (SBR), chloroprene rubber (CR),
Examples thereof include nitrile rubber (NBR), ethylene propylene diene copolymer rubber (EPDM), butyl rubber (IIR), chlorinated butyl rubber (Cl-IIR), and a blend rubber thereof. NR or non-polar diene rubber (SBR, IR, etc.) mainly composed of NR or NR which is excellent in mechanical strength, wear resistance and rubber elasticity (vibration absorption).
BR) is desirable. In particular, in the case of the first rubber compound containing a crosslinkable pressure-sensitive adhesive as an essential component, it is desirable to use a blend of a diene-based synthetic rubber. That is, since NR alone has tackiness without blending a pressure-sensitive adhesive, conversely, if a pressure-sensitive adhesive is blended, excessive tackiness is exhibited. Therefore, it is desirable to reduce the tackiness by blending a diene-based synthetic rubber.

Here, when a blended rubber is used, as a rubber polymer of the first rubber compound (for the main rubber portion), SBR which contains styrene and is easily blended with SBR which is easy to secure hardness is used.
R / SBR blend rubber is preferred. As the rubber polymer of the second rubber compound (for the sliding rubber portion), NR / BR obtained by blending BR exhibiting high elasticity, low heat generation, and good wear resistance is desirable. Here, the blend ratio is NR
/ SBR ≧ 30/70 or more, desirably 70/30 to
90/10. In addition, NR / BR ≧ 30/70, preferably 40/60 to 60/40.

(2) In the present invention, the first rubber compound has a vulcanization characteristic (JIS K 6300: Curastometer) of t ₉₀ (90% vulcanization time) −t ₅₀ (50% vulcanization time) ) ≧
It satisfies the requirement of 1.5 min and contains a crosslinkable pressure-sensitive adhesive.

(I) Here, the vulcanization characteristics are usually adjusted by combining the type and amount of the vulcanization accelerator. Examples of the vulcanization accelerator include guanidines, thioureas, thiazoles, sulfenamides, thiurams, dithiocarbamine hydrochlorides, xanthates, and the like.

For example, when an NR-based rubber polymer is used, a benzothiazole sulfide compound (benzothiazole 2-thio compound:
(Thiazoles in a broad sense) As shown in FIGS. 4 (thiazoles) and 5 (sulfenamides), the vulcanization torque curve (rheometer, 14
0 ° C.). Fig. 4.
5 is quoted from FIGS. 3 and 13 and FIGS. 3 and 14 of “ABC of New Rubber Technology”, p78, published by The Rubber Association of Japan, Tokai Branch, Hei 5-6-1.

Here, the benzothiazole sulfide compound is a compound containing a group represented by the following structural formula, and is classified as a vulcanization accelerator and is represented by thiazoles (excluding sulfenamides) and sulfenamides. Things.

[0033]

Embedded image

As the thiazoles, mercaptobenzothiazole (M), dibenzothiazyl disulfide (D
M), zinc salt of 2-mercaptobenzothiazole (M
Z), 2- (2,4-dinitrophenyl) -mercaptobenzothiazole (DMB), cyclohexylamine salt of 2-mercaptobenzothiazole (M-60), N,
N-diethyl-thiocarbamoyl-2-benzothiazolyl sulfide (64), 2- (4-morpholinodithio) -benzothiazole (MDB) and the like can be mentioned.

As the sulfenamides, cyclohexyl-benzothiazylsulfenamide (CZ), N-
Oxydiethylene-2-benzothiazolesulfenamide (MSA), N-tert-butyl-2-benzothiazolesulfenamide (NS), N, N-diisopropyl-2-benzothiazolesulfenamide (PS
A), N, N-dicyclohexyl-2-benzothiazolesulfenamide (DZ) and the like.

Among these, in particular, among the thiazoles, mercaptobenzothiazole (M), dibenzothiazyl disulfide (DM), whose curing rise is slow, and
Those containing di (2-mercaptobenzothiazole) zinc (MZ) and the like can be suitably used. Further, among the sulfenamides, those containing N, N-dicyclohexyl-2-benzothiazolesulfenamide (DZ) or the like whose vulcanization rises slowly can be preferably used.

The amount of the vulcanization accelerator varies depending on the set vulcanization characteristics, but is 1 to 3 phr.

(Ii) The crosslinkable pressure-sensitive adhesive may be a general-purpose pressure-sensitive adhesive mixed with a vulcanizing agent (a diene-based co-vulcanizing agent) as long as the vulcanizing action is not exerted during kneading. A resin which itself has a crosslinking action (for example, phenol formaldehyde resin) or a resin in which an adhesive is bonded to sulfur (a phenol polysulfide resin) can be suitably used.

Here, examples of the pressure-sensitive adhesive (tackifier) include the following (edited by the Chemical Society of Japan, “Chemical Handbook, Application Edition, Revised 3rd Edition” (Showa 55-3-15), Maruzen, p. 9).
49).

Coumarone resin type: a mixture of coumarone-indene resin, coumarone resin-naphthenic oil-phenol resin-rosin.

Phenol / terpene resin: phenol-formaldehyde resin, pt-butylphenol-acetylene resin, terpene-phenol resin, polyterpene resin and the like.

Petroleum hydrocarbon resins: synthetic polyterpene resins, aromatic hydrocarbon resins, aliphatic hydrocarbon resins and the like.

Rosin derivatives: rosin-pentaerythritol-ester, hydrogenated rosin, high melting point ester resin and the like.

Others: turpentine-based adhesives, mixtures of fatty acids and amine resin soaps, and synthetic resin-phthalate co-condensates.

A vulcanizing agent for a diene rubber is bonded (usually chemically bonded) to these pressure-sensitive adhesives to form a crosslinkable pressure-sensitive adhesive. Examples of the vulcanizing agent include sulfur, thiuram, and quinoids, and sulfur and thiuram are preferable in terms of physical properties.

Here, as the rubber polymer, NR series, S
When a non-polar rubber polymer such as a BR polymer is used, a pressure-sensitive adhesive based on an alkyl phenol in which a higher alkyl group (usually C6 to C12) is introduced as a phenol to improve compatibility with the non-polar rubber polymer is used. I do. An alkylphenol / halogenated (chlorinated) sulfur condensate (alkylphenol polysulfide resin) represented by the following structural formula can be suitably used.

[0047]

Embedded image

Further, among the above-mentioned pressure-sensitive adhesives, the phenol-formaldehyde resin itself can be used as a so-called resin vulcanizing agent, so that it is not necessary to bond a vulcanizing agent such as sulfur. However, in the resin vulcanization, a halogenated resin is preferable because the physical properties of the vulcanized rubber are improved. Specifically, a halogenated (brominated) alkylphenol formaldehyde resin represented by the following structural formula can be suitably used. .

[0049]

Embedded image

The amount of the crosslinkable pressure-sensitive adhesive varies depending on the type of the rubber polymer in the main rubber portion / sliding rubber portion and the type of the crosslinkable pressure-sensitive adhesive (mainly, the difference in crosslinking reactivity and crosslinking reaction point density). . For example, when the rubber polymer is NR-based and the crosslinkable pressure-sensitive adhesive is an alkylphenol polysulfide resin for both the main rubber portion and the sliding rubber portion, usually 0.25
~ 5 phr, preferably 0.5-2.5 phr. When the same crosslinkable pressure-sensitive adhesive is an alkylphenol formaldehyde resin, the amount is usually 1 to 8 phr, preferably 2 to 6 phr.

If the amount of the crosslinkable pressure-sensitive adhesive is too small,
Effect of the invention (t for the rubber part of the main body) ₉₀After the passage
(Securing vulcanization adhesiveness of the dynamic rubber part). Conversely, compound
If the amount becomes excessive, the rubber part of the main body becomes excessively sticky and
In addition, the compression set (CS) may decrease. Special
Pressure in the case of sulfur-donating phenol polysulfide
A reduction in permanent set is likely to occur. Phenol polysulf
The presence of a hydride contributes to the improvement of compression set.
Because the ratio of nosulfide disulfide bridges decreases
It is estimated to be.

(3) In addition to the above-mentioned vulcanizing agent, vulcanization accelerator and crosslinkable tackifier, the first rubber compound having the above-mentioned composition may contain usual auxiliary materials such as zinc white, stearic acid and carbon black. , Anti-aging agents, etc. At this time, the rubber hardness H _S (A)
(JIS K 6301) is 60 to 95, preferably 65 to 8
5 (adjusted by the amount of the vulcanizing agent, the amount of carbon black, etc.). If the rubber hardness is too high,
It is difficult to secure the vibration absorption required for the bush.

On the other hand, to the second rubber compound, a vulcanizing agent, a vulcanization accelerator, zinc white, stearic acid, carbon black, an antioxidant, and a process oil are added to the rubber polymer, and a high sliding property is obtained. Contains a lubricant to provide. Here, as the lubricant, one or a combination of two or more of higher fatty acid amide, polyethylene / paraffin wax, fatty acid ester (excluding fatty acid amide), dimethylpolysiloxane and the like are used. Among these, higher fatty acid amides are desirable from the viewpoint of bloom sustainability. The amount of the fatty acid amide is 5 to 40 phr, preferably 10 to 40 phr.
Mix 35 phr. When the amount of the higher fatty acid amide is too small, it is difficult to impart sufficient sliding properties.
This may adversely affect the vulcanization adhesion at the interface between the main rubber portion and the sliding rubber portion, and may adversely affect the physical properties (particularly rubber strength) of the vulcanized rubber. Here, as the higher fatty acid amide, saturated (the former two) and unsaturated (the latter two) such as palmitic amide (C16), stearic amide (C18), oleic amide (C18), and erucic amide (C22) are exemplified. (3) Fatty acid amide can be suitably used. At this time, from the viewpoint of reducing the spring constant of the bush, the rubber hardness is set slightly lower than that of the first rubber compound. The difference in rubber hardness is set at $ 10 to $ 20. That is, when the rubber hardness H _S (A) (JIS K 6301) is 4
0 to 85, preferably 45 to 75 (adjustable amount of vulcanizing agent, carbon black, etc.). If the rubber hardness is too low, problems (particularly abrasion, etc.) are likely to occur in the durability of the bush. If the difference in rubber hardness is too large, higher vulcanization adhesive strength is required.

(4) Next, the molding of the bush by using each of the above-mentioned compounds is performed by using a mold as shown in FIG.

That is, the main rubber part 2 was
After molding 6, the sliding rubber portion 24 is formed inside the main rubber portion 26 with the second rubber compound, and the sliding rubber portion 24 is co-cross-linked to the main rubber portion 26, as shown in FIG. Manufacture bushes.

At this time, the thickness of the sliding rubber portion varies depending on the type of the bush.
When the diameter is 19 mm and the inner diameter is 19 mm, the diameter is 3 to 4 mm. If the wall thickness is too thin, the durability (lifetime) of the lubricant becomes short. Conversely, if the thickness is too large, the spring constant of the bush will decrease.

The molding conditions at this time are as follows.

First, at the time of injection molding of the main rubber portion 26, the injection material temperature is set to 150 to 170 ° C., and the mold clamping time (90% vulcanization time) is set to 1.5 to 3.0 min.

Subsequently, the upper die is replaced, and the sliding rubber portion 2
In the injection molding of No. 4, the injection material temperature: 150 to 1
70 ° C, mold clamping time (90% vulcanization time): 1.5 to 3.
0min.

The bush formed in this way has a sufficient cross-linking adhesive strength between the main rubber portion and the sliding rubber portion as shown in a test example described later, and there is no deformation of the main rubber portion.

[0061]

Test Examples Hereinafter, test examples performed to confirm the effects of the present invention will be described.

A first rubber molded product was injection molded using the first rubber compound shown in Table 2 in which the vulcanization characteristics (t ₉₀ -t ₅₀ ) were adjusted so as to show the respective values (min) shown in Table 1. (100mm
□ × 3.0 mmt). <Example and type of vulcanization accelerator
Same as Comparative Example. > After the respective vulcanization times of t ₅₀ , t ₉₀ , and t ₁₃₅ , the second rubber molding (100 mm □ × 3.0 mmt) was converted to the first rubber molding using the second rubber compound shown in Table 4. The composition was injection-molded on top and vulcanized. The vulcanization conditions were as follows.

Injection molding of the first rubber molded body: injection material temperature: 160 ° C., mold clamping time (90% vulcanization time): 2.5
min.

Injection molding of the second rubber molded body: injection material temperature: 160 ° C., mold clamping time (90% vulcanization time): 2.5
min.

For each of the test pieces (rubber laminate) obtained above, a 180 ° peel test (JIS K 6301, tensile speed: 50 mm / min) and a compression set test (JIS K 6301) in an atmosphere of 80 ° C. , Heat treatment conditions: 100 ° C ×
70h). Table 1 showing the results and FIG. 6 show the following.

Each embodiment satisfying the requirements of the present invention is
be shaped second rubber molding to t ₉₀ after, good adhesive strength (rubber destruction: R) it can be seen that.

In particular, Example 2 using a thiazole compound containing DM and phenol polysulfide as a crosslinkable pressure-sensitive adhesive.
Be shaped second rubber molding after the t ₉₀ elapses, it can be seen that good adhesive strength.

Examples 1-3 for Comparative Example 2 and Examples 4.5 for Comparative Example 1 each used a different type of vulcanization accelerator (the former: thiazole type, the latter: sulfenamide). Vulcanization characteristics (t ₉₀ -t ₅₀ ) even though the amount is the same
It is presumed that the crosslinkable pressure-sensitive adhesives exhibit a vulcanization retarding action. In Example 1-3, the reason that the vulcanization characteristics did not change despite the increase in the amount of the crosslinkable pressure-sensitive adhesive was that the vulcanization retarding action was saturated with a small amount (0.5 phr). Is estimated to be reached.

FIG. 7 schematically shows the vulcanization characteristic curves of Example 2 (invention) and Comparative Example 1 (conventional example).

[0070]

[0071]

[Table 1]

[0072]

[Table 2]

[0073]

[Table 3]

[Brief description of the drawings]

FIG. 1 is a perspective view of a mounting mode of a stabilizer bush to which the present invention is applied.

FIG. 2 is a cross-sectional view and a vertical cross-sectional view of a stabilizer bush to which the present invention is applied.

FIG. 3 is a schematic cross-sectional view of each mold in a manufacturing process of the stabilizer bush of FIG. 2;

FIG. 4 is a graph showing vulcanization torque curves of various thiazoles.

FIG. 5 is a graph showing vulcanization torque curves of various sulfenamides.

FIG. 6 is a graph showing the relationship between the amount of phenol polysulfide added and the adhesiveness and compression set (CS).

FIG. 7 is a graph schematically showing vulcanization torque curves in the present invention (Example 1) and a conventional example (Comparative Example 1).

[Explanation of symbols]

 12, 12A Stabilizer bush 24 Sliding rubber part 26 Body rubber part

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) C08L 61/06 C08L 61/06 81/04 81/04 F16F 15/08 F16F 15/08 K // (C08L 7/00 (C08L 7/00 81:04) 81:04) (72) Inventor Hiroshi Yokoi 1 Ogatai Ogata, Hatsukamachi, Nishikasugai-gun, Aichi Prefecture Inside Toyoda Gosei Co., Ltd. (72) Inventor Katsuya Hatano Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture 1 Ogata Ochiai Nagahata Toyoda Gosei Co., Ltd. F-term (reference) 3J048 AA01 BA19 BD04 DA06 EA17 3J059 AD04 AD06 BA42 BA43 BC06 BC19 BD07 EA05 EA13 GA05 4F071 AA10B AA11B AA41A AA63A AC13A AE03A27 CA03 AC03 CA03 AC03 CN022 EV326 FD156 FD342 GM00

Claims (12)

[Claims] 1. A sliding body molded inside a main rubber part with a main rubber part formed of a sulfur vulcanized first rubber compound and a second rubber compound containing a sulfur vulcanized lubricant. a stabilizer bushing that includes a dynamic rubber portion, the first rubber formulation, vulcanization characteristics (JIS K 6300: Curelastometer) at, t ₉₀ (between 90% vulcanization) -t ₅₀ (50% Vulcanization time) ≧
A stabilizer bush for vehicles, which satisfies the requirement of 1.5 min and contains a crosslinkable pressure-sensitive adhesive. 2. The stabilizer bush for a vehicle according to claim 1, wherein the crosslinkable pressure-sensitive adhesive is a phenol formaldehyde resin. 3. The stabilizer bush for vehicles according to claim 1, wherein the crosslinkable pressure-sensitive adhesive is a phenol polysulfide resin. 4. When the rubber polymer of the first rubber compound is a natural rubber (NR) resin and an alkylphenol polysulfide resin is used as the phenol polysulfide resin, the compounding amount of the crosslinkable pressure-sensitive adhesive is 0.25 to 5 phr. The stabilizer bush for vehicles according to claim 3, wherein: 5. The method according to claim 1, wherein the rubber polymer in the first rubber compound and the second rubber compound is NR-based, and the vulcanization accelerator in the first rubber compound is a benzothiazole sulfide compound. Claim 1,
The stabilizer bush for vehicles according to 2, 3, or 4. 6. A main rubber portion is molded with a sulfur-vulcanized first rubber compound, and a sliding rubber portion is formed inside the main rubber portion with a second rubber compound containing a sulfur-vulcanized lubricant. In a method for manufacturing a stabilizer bush, which is manufactured by co-crosslinking a sliding rubber portion with a main rubber portion, a vulcanization property (JIS K 6300:
T ₉₀ (90% vulcanization time) −t ₅₀ (50% vulcanization time) ≧
A method of manufacturing a stabilizer bush for vehicles, comprising using a crosslinkable pressure-sensitive adhesive which satisfies the requirement of 1.5 min. 7. The method according to claim 6, wherein the crosslinkable pressure-sensitive adhesive is a phenolic resin. 8. The method according to claim 7, wherein the crosslinkable pressure-sensitive adhesive is a phenol polysulfide resin. 9. When the rubber polymer of the first rubber compound is a natural rubber (NR) system and an alkylphenol polysulfide resin is used as the phenol polysulfide resin, the compounding amount of the crosslinkable pressure-sensitive adhesive is 0.25 to 5 phr. The method for manufacturing a stabilizer bush for a vehicle according to claim 8, wherein 10. The rubber polymer in the first rubber compound and the second rubber compound is NR-based,
The method for producing a stabilizer bush for a vehicle according to claim 6, wherein the vulcanization accelerator in the first rubber compound is a benzothiazole sulfide compound. 11. A second rubber compound containing a sulfur-vulcanized lubricant after forming a main rubber part with a sulfur-vulcanized first rubber compound, and after a vulcanization time of 90% of the main rubber part has elapsed. Molding a sliding rubber portion inside the main body rubber portion with a material, and in a method of manufacturing a stabilizer bush that is manufactured by co-crosslinking the sliding rubber portion with respect to the main body rubber portion, as the first rubber compound, Vulcanization characteristics (JIS K 6300: Curast meter)
In the formula, t ₉₀ (90% vulcanization time) −t ₅₀ (50% vulcanization time) ≧
A method for manufacturing a stabilizer bush for vehicles, comprising using a crosslinkable pressure-sensitive adhesive which satisfies the requirement of 1.5 min. 12. A main rubber portion molded with a sulfur-vulcanized first rubber compound and a second rubber compound containing a sulfur-vulcanized lubricant mixed after molding the main rubber portion. a rubber laminate comprising a sliding rubber portion which is, the first rubber formulation, vulcanization characteristics (JIS K 6300: Curelastometer) at, t ₉₀ (between 90% vulcanization time) -t ₅₀ (50% vulcanization time) ≧
A rubber laminate, which satisfies the requirement of 1.5 min and contains a crosslinkable pressure-sensitive adhesive.