KR101693637B1 - Composition for Heat-Resistant Noise Preventing Stabilizer Bar Bush - Google Patents

Abstract

The present invention relates to a stabilizer bar bushing composition which is excellent in elasticity at a high temperature and a low temperature and which is advantageous for jointing, and which can be used as a rubber component, a sulfur accelerator, a reinforcing agent, Heat stabilizers for stabilizer bar bushes, which contain additives, lubricants, additives, and lubricants.

Description

[0001] The present invention relates to a high heat resistant stabilizer bar bushing composition,

The present invention relates to a composition of a heat resistant anti-seizure stabilizer bar bush.

Generally, a suspension of a vehicle prevents damage to the vehicle body and cargo by preventing vibrations or shocks received from the road surface from being transmitted directly to the vehicle body when the vehicle travels by connecting the axle and the vehicle body, thereby improving the ride quality.

A suspension device that performs such a function is configured to include a stabilizer bar for reducing the rolling phenomenon occurring in the vehicle body during turning of the vehicle so as to improve the running stability.

Conventional stabilizer bar bushes have a problem in that the low temperature flexibility of the rubber is insufficient in the winter, resulting in permanent deformation of the rubber, resulting in a joint. Thus, a technology for improving the permanent deformation at low temperature and effectively reducing the joint has been developed.

However, due to downsizing and high performance of the engine room, the temperature around the stabilizer bar has been increased. As a result, the new high temperature deformation and premature exhaustion of the self lubricant caused a joint in the summer season. However, it is difficult to control the high temperature and low temperature regions at the same time. Combining the ratio of the magnetic lubricant and the sulfur / promoter to improve the low temperature improves the friction performance and the low temperature permanent compression ratio, Application of a promoter with low resilience to elasticity and application of imidazole antioxidant have improved the joint and durability in single products.

In addition, the conventional technique uses a composition that improves the low-temperature permanent compression ratio in order to improve the noise during the winter season. Examples of the crosslinking accelerator include N-cyclohexylbenzothiazole-2-sulfenamide, N, N'-m-phenylene dimaleimide, dibenzothiazyl disulfide (DM), tetramethylthiuram disulfide (TT) As a result, the fatigue performance was improved by using a general crosslinked structure having a high sulfur content as a base. As a result, the low temperature is favorable, but the heat resistance performance is disadvantageous.

A rubber material for supporting a stabilizer bar used to prevent the vehicle body from tilting significantly when the vehicle is cornered. This rubber has an advantage of improving the steering stability of the vehicle. However, due to high engine durability and high engine durability, the engine room size has become smaller as the engine room size has become smaller. As a result, the temperature around the stabilizer bar bushes has increased by more than 30 ° C.

Accordingly, the inventors of the present invention have found that a high-temperature stabilizing bar-bushing composition which is excellent in elasticity at high and low temperatures, and which is advantageous for joining, is deformed due to unfavorable heat resistance.

Accordingly, an object of the present invention is to provide a stabilizer bar bushing composition having a high heat and low temperature resilience and a high heat-resistant coupling reduction type which is advantageous for jointing.

The present invention is characterized in that it comprises a composition for a stabilizer bar bush for a high heat resistant automobile comprising a rubber component, a sulfur and sulfur promoter part, a reinforcing agent, an activator, an additive, and a lubricant.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

The stabilizer bar bush comprising the composition of the present invention has the advantage that flexibility is maintained at low temperatures and the problem of bushing at high temperatures can be overcome.

Further, the heat resistance and the high temperature compression permanent shrinkage ratio can be improved by 50% or more without loss of low-temperature properties, thereby improving the noise.

According to one aspect of the present invention there is provided a rubber composition comprising 100 parts by weight of a rubber component, 0.1-5 parts by weight of sulfur, 0.1-3 parts by weight of a sulfur promoter, 40-70 parts by weight of a reinforcing agent, 1-15 parts by weight of an activator, And 1 to 15 parts by weight of a lubricant, for a stabilizer bar bush for a high heat resistant automobile.

According to a preferred embodiment of the present invention, the rubber is a blend of natural rubber and butadiene rubber. More preferably, the content of the natural rubber and butadiene rubber is 20 to 40% by weight of natural rubber and 60 to 80% by weight of butadiene rubber, and most preferably, natural rubber 25 -35% by weight, and 65-75% by weight of butadiene rubber.

The content ratio of sulfur and sulfur promoter is 0.8-1.0, which is most suitable for fatigue performance and aging performance, and can satisfy the permanent compressive strain rate simultaneously. When the content ratio is 1.0 or more, the aging performance is disadvantageous. When the content ratio is 0.8 or less, the fatigue performance is disadvantageous.

According to a preferred embodiment of the present invention, the sulfur promoter is CZ, TT or OTOS alone or a mixture thereof. More preferably, 0.5 to 2 parts by weight of a sulfenamide vulcanization accelerator, which is excellent in thermal stability and permanent compression streaking noise, is used. By using 1.0 to 3 parts by weight of MB as a primary antioxidant, It improves sex at the same time. If OTOS and MB are used alone, they have good heat resistance, but they are disadvantageous in terms of permanent compression performance. When the content is low, thermal stability is disadvantageous. However, when the content is high, initial properties are deteriorated and fatigue performance is deteriorated.

A vulcanizing accelerator is used in combination with a vulcanizing agent to shorten the vulcanizing time, lower the vulcanizing temperature, and reduce the vulcanizing agent. Vulcanization accelerators include inorganic vulcanization accelerators and organic vulcanization accelerators such as lime-lime magnesia zinc oxide Litharge, and organic vulcanization accelerators can be classified as follows. But is not necessarily limited thereto.

a. Guanidine system; D. DT

b. Aldehyde-Amine system; Accelerator 808. Nokera-8

c. Aldehyde-Ammonia system; H

d. Thiazole system; M. DM, MZ. MH.

e. Sulfenamide system; CZ. DZ. NS.

f. Thiourea system; C. Na-22. T.

g. Thiuram system; TS. TT. TET. TRA.

h. Di thiocarbamate system; ES. SDD. TP. PZ. BZ. PX.

I. Xanthate system; Natural vulcanization products. Low temperature vulcanization.

j. A mixture promoter; F. MZ-1. MX-K.

According to a preferred embodiment of the present invention, the reinforcing agent is carbon black.

Reinforcing Agents is a compounding agent that improves physical properties such as tensile strength, rebound resilience and tear resistance of vulcanized products by mixing with rubber. The smaller the particle size, the greater the reinforcing effect and the lower the rubber elasticity. Shaped is good in reinforcement and is in a needle shape. In general, the reinforcing agent is composed of carbon black, an inorganic reinforcing agent, and an organic reinforcing agent. It is described below that the reinforcing agent is mainly used as a reinforcing agent, but the present invention is not limited thereto.

A) Carbon Black)

1. Channel black: EPC, MPC, CC,

2. Furnace black: SAF, SAF-HS, SAF-LS, ISAF, HAF, MAF, FEF, HMF, SRF, SPF, GPF and APF. FF, CF, SCF, ECF.

3. Thermal black: FT, MT,

B) Weapon Reinforcements

1. Silica back carbon

2. Basic magnesium carbonate

3. Activated calcium carbonate

4. Special calcium carbonate

C) Organic reinforcing agent

1. High-styrene resin

2. Cyclization rubber

3. Coumarone Indene Resin

4. Phenol formaldehyde resin

According to a preferred embodiment of the present invention, the additive is an antioxidant. More preferably, the antioxidant is N (1,3-dimethylbutyl) -N'-phenyl-P-phenylenediamine, P-90 , 2,2,4-trimethyl-1,2-dihydroquinoline, 2-mercaptotoluimidazole and a vulcanization retarder (PVI).

The anti-aging agent of the present invention generally ages a phenomenon that mechanical properties such as oxidation, heat, light and ozone cause physical deterioration such as hardening, softening, ignition, And anti-aging agent for the purpose of preventing aging.

The anti- It is classified into antioxidant, ozone deterioration inhibitor, heat antioxidant, sunshine antifogging agent, flexural toughening agent and the like in terms of action and effect, and can be classified into amine antioxidant, phenol antioxidant and wax antioxidant in terms of chemical structure.

When selecting an antioxidant, consideration should be given to the antioxidant performance (oxidation, heat, bending sunlight, etc.), the effect on the vulcanization rate, the effect on the physical properties of unvulcanized rubber and vulcanized rubber, stainability and bloomability.

According to a preferred embodiment of the present invention, the lubricant is a wax or an amide-based lubricant.

3 to 8 parts by weight of oleic acid amide, which is a magnetic lubricant, and 5 to 10 parts by weight of erucamide were used together with 1 to 3 parts by weight of micro wax to improve the coefficient of friction to 0.25 or less. When the content is low, the friction performance is deteriorated. When the content is high, the initial state property is disadvantageous, which is disadvantageous to long-term aging resistance.

Hereinafter, examples of the present invention will be described. The embodiments are preferred embodiments of the present invention and are not limited to the following contents.

Example

(One) Example  1, 2

The components and business names included in the stabilizer bar bushing composition of the present invention are shown in Table 1 below.

Item company name Raw rubber NR Natural rubber (SMR CV60) BR Butadiene rubber (LG Chem) sulfur S (Miwon Company) Sulfur accelerator CZ Cyclohexylbenzothiazole celpene amide (TYO Chemical) TT Tetramethylthiuram disulfide, oriental chemistry OTOS N-oxydiethylene thiocarbamyl-N'-oxydiethylene sulfenamide
(Dow Chemical) Filler ISAF, HAF, FEF, MAF (Korea Carbon Black) Activator ZnO Zinc oxide (Korea-Japan Zinc) Stearic acid Stearic acid (Danseok Chemical) additive 6PPD N (1,3-dimethylbutyl) -N'-phenyl-P-phenylenediamine (Nurchem) CIR P-90 (cologne oil painting) RD 2,2,4-trimethyl-1,2-dihydroquinoline (Bayer) MB 2-Mercaptobenzimazole (Dalian Riche) ZMTI Mercaptotoluimidazole PVI Vulcanization retardant (Kawaguchi Co.) slush Wax, Amide-based lubricant N-2 process oil,
Oleic / Eurcamide: Amide-based lubricant (AKZO NOBEL)
Wax (Seiro Chemical Co., Ltd., Toyo Chemical)

For the purpose of the present invention, MAF and HAF (N550) series having excellent rebound resilience were used for the carbon black. The anti-aging agent was a combination of imidazole-based ZMTI (zinc 2-mercaptotoluimidazole) and clovernyl RD (1,2 Dihydro-2,2,4-trimethyl quinoline). The crosslinking accelerator was prepared by using N-oxydiethylenethiocarbamyl-N'-oxydiethylene sulfonamide (OTOS), which is excellent in heat loss and permanent compressive strain, with amine-based primary antioxidant MB (2-mercaptobenzimidazole) Improved syllabic rate.

The components of the stabilizer bar bushing composition to be used in Examples 1 and 2, Comparative Example 1 and Comparative Example 2 are shown in Table 2 below.

Item Example 1 Example 2 Comparative Example 1 Comparative Example 2 Raw rubber NR 30 30 30 30 BR 70 70 70 70 sulfur S 2 2.5 3 3.6 Sulfur accelerator CZ 0.6 0.6 0.8 1.0 TT 0.4 0.4 0.4 1.0 OTOS 1.0 1.0 Filler ISAF - - 45 55 HAF - - 10 10 FEF 55 - - - MAF - 55 - - Activator ZnO 10 10 7 5 Stearic acid 1.5 1.5 2.5 1.5 additive 6PPD 2 2 3 3 CIR - - 5 5 RD One One 2 2 MB 1.5 1.5 - - ZMTI 1.0 1.2 - - PVI - - 0.2 0.2 slush Wax, Amide-based lubricant 8 10 12 10

(2) Comparative Example  1, 2

In the comparative examples, ISAF and HAF series were used as the carbon black. The remaining composition ratios are as shown in Table 2 above.

(3) Experimental results

The stabilizer bar bush made of the composition of the present invention was subjected to an experimental evaluation according to hardness, heat resistance, permanent compression toughness, friction coefficient, and noise, and the results are shown in Table 3 below.

Item Example Comparative Example #One #2 #One #2 material Hardness (Hs) 71 71 69 70 Heat resistance
(100 ° C x
70 hours) Hardness change (? Hs) +4 +4 +7 +9 Tensile strength change rate (%) -5 0 -19 -8 Elongation rate (%) -25 -15 -46 -45 Permanent compression
Row tone rate (%) High temperature (100 占 폚 占 22 hours) 14 17 40 15 Low temperature (-30 캜 x 72 hours) 30 31 31 37 Coefficient of friction (wt%) 0.23 0.14 0.40 0.50 part Noise and Noise No No Yes Yes

As a result of the evaluation, it was found that the heat resistance test results satisfied the high heat resistance properties which were much superior to those of Comparative Examples 1 and 2, and the improvement of the friction coefficient was greatly improved, thereby improving the joint performance in a single product. In the example, no noise of the component was found.

Claims (9)

100 parts by weight of a rubber component, 0.1-5 parts by weight of sulfur, 0.1-3 parts by weight of a sulfur promoter, 40-70 parts by weight of a reinforcing agent of carbon black, 1-15 parts by weight of an activator, 1-10 parts by weight of a lubricant 1- 15 parts by weight,
The sulfur promoter is a mixture of cyclohexyl benzothiazole celpene amide (CZ), tetramethylthiuram disulfide (TT) and N-oxydiethylene thiocarbamyl-N'-oxydiethylene sulfenamide (OTOS)
The antioxidant is an imidazole antioxidant selected from the group consisting of 2-mercaptobenzimazole (MB) and mercaptotolylimidazole (ZMTI)
Wherein the ratio of the sulfur-sulfur promoting agent to the sulfur-sulfur promoting agent is 1: 0.8 to 1.0 by weight.
The composition of claim 1, wherein the rubber is a blend of natural rubber and butadiene rubber.
The composition according to claim 2, wherein the natural rubber and butadiene rubber are 20-40 wt% of natural rubber and 60-80 wt% of butadiene rubber, when the total rubber component is 100 wt%.
delete delete The composition of claim 1, wherein the carbon black reinforcing agent is FEF or MAF or a mixture thereof.
delete The antioxidant according to claim 1, wherein the antioxidant is selected from the group consisting of N (1,3-dimethylbutyl) -N'-phenyl-P-phenylenediamine, P-90, 2,2,4- , 2-dihydroquinoline, and a vulcanization retarder (PVI).
The composition of claim 1, wherein the lubricant is a wax or an amide based lubricant.