KR100521544B1 - Rubber for packing of automobile oil filter - Google Patents

Abstract

The present invention relates to a rubber for automotive engine oil filter packing, and more particularly, to a hybrid type of a two-layer structure of an inner rubber layer and an outer rubber layer of an engine oil filter packing rubber made of a conventional single layer, wherein the inner rubber layer is acryl A certain amount of rubber, super clay, and antioxidant is contained, and a certain amount of silicone rubber, super clay, and antioxidant is contained in the outer rubber layer so that it can be vulcanized and bonded, and thermal curing and leakage of oil filter packing, which is a problem when long-time rubber is used The present invention relates to a rubber for automobile engine oil filter packing which reduces the occurrence of leaks and cracks and improves physical properties such as heat resistance, cold resistance, and durability.

Description

Rubber for packing of engine oil filter for automobiles {Rubber for packing of automobile oil filter}

The present invention relates to a rubber for automotive engine oil filter packing, and more particularly, to a hybrid type of a two-layer structure of an inner rubber layer and an outer rubber layer of an engine oil filter packing rubber made of a conventional single layer, wherein the inner rubber layer is acryl A certain amount of rubber, super clay, and antioxidant is contained, and a certain amount of silicone rubber, super clay, and antioxidant is contained in the outer rubber layer so that it can be vulcanized and bonded, and thermal curing and leakage of oil filter packing, which is a problem when long-time rubber is used The present invention relates to a rubber for automobile engine oil filter packing which reduces the occurrence of leaks and cracks and improves physical properties such as heat resistance, cold resistance, and durability.

In automobiles, lubricating oils, or engine oils, are used with the filtration material to reduce frictional resistance of engines and to cool engines. However, due to the structure of the engine oil filtration oil filter that is generally applied in the filtration process, the engine oil is not completely attached to the cylinder block, and there is a significant leakage of the engine oil in actual use.

Therefore, in forming the oil filter, a groove is formed at the edge of the seaming cap on the reinforcement plate of the oil filter to prevent leakage of the engine oil, and a packing is provided therebetween so as to be able to be pressed against the cylinder block. In order to reduce the weight and make the contact more secure, studies have been conducted.

For example, in Korean Laid-Open Patent Publication No. 1999-35149, an oil seal having a circular cross section arc-shaped is formed circumferentially with respect to a rectangular rubber packing that has been most commonly used. Has been proposed to assemble to a predetermined depth, but in this case, like the conventional rectangular oil seal, that is, the rubber packing, the rubber packing portion protruding to the upper part of the seal groove when pressed with the cylinder block is moved from the center to both sides. Squeezed out, the rubber packing portion squeezed out to the side will eventually be cut off after some time due to internal pressure and deterioration, and the volume of the rubber packing is reduced by hardening. In this case, the rubber packing does not play a role and there is a gap between the cylinder block, which does not fundamentally improve the problem of engine oil leakage.

On the other hand, efforts to improve the material of the rubber packing as well as the method of deforming the shape of the rubber packing as a way to prevent the leakage of engine oil more effectively, but notable research results have been published so far. not.

The oil filter packing used in the prior art is mainly made of nitrile butadiene rubber (NBR), and carbon black and sulfur are added thereto, and the rubber packing made of such a composition is satisfactory for preventing leakage of engine oil. The results have not been shown, and in particular, when the vehicle is operated for a long time in a severe condition such as a cold season, there is a problem in that the sealing effect is remarkably inferior, such as cracks in the rubber packing, and improvement has been required. In addition, nitrile butadiene rubber has been pointed out as a problem due to poor heat resistance, cold resistance and durability.

Accordingly, the inventors of the present invention have made efforts to solve the above problems, and as a result, a conventional single-layer engine oil filter packing rubber is a hybrid type of two-layer structure of an inner rubber layer and an outer rubber layer, and an acrylic on the inner rubber layer. When a certain amount of rubber, super clay and antioxidant is contained, and a certain amount of silicone rubber, super clay and antioxidant is contained in the outer rubber layer, and the rubber is subjected to vulcanization, it is found that the sealing performance is greatly improved, thereby completing the present invention.

Accordingly, an object of the present invention is to provide a rubber for automobile engine oil filter packing, which reduces the occurrence of thermal curing, water leakage and cracking of the packing, and improves physical properties such as heat resistance, cold resistance, and durability.

The present invention relates to a rubber for automobile engine oil filter packing of a material containing carbon black, reinforcing material, processing oil, antioxidant, softener and vulcanizing agent as an additive to a rubber component. An inner rubber layer containing 1 to 10 parts by weight and an antioxidant; It features a rubber for automobile engine oil filter packing made by vulcanizing adhesion of the outer rubber layer containing 1 to 100 parts by weight of super clay and 1 to 10 parts by weight of antioxidant with respect to 100 parts by weight of silicone rubber.

Referring to the present invention in more detail as follows.

According to the present invention, the acrylic rubber and the silicone rubber having excellent heat resistance and durability are vulcanized and bonded in a two-layer structure of the outer rubber layer to improve heat resistance, cold resistance, durability, and the like. The present invention relates to a rubber for automotive engine oil filter packing which reduces the occurrence of heat cure, leakage and cracks.

Referring to the components constituting the inner rubber layer of the rubber for automobile engine oil filter packing according to the present invention as described above in more detail.

The inner rubber layer contains 1 to 100 parts by weight of super clay and 1 to 10 parts by weight of antioxidant based on 100 parts by weight of acrylic rubber.

As the acrylic rubber, an acrylic content of 34 to 43% and a sulfur content of 1.0 to 9.0% are used, and have excellent heat resistance and cold resistance. When the acrylic content of the acrylic rubber used in the present invention is less than 34%, the heat resistance is weak, so that the packing is hardened or the elasticity is poor when used for a long time, so that the engine oil leaks, and if it exceeds 43%, the cold resistance is weak and the packing is cracked. This causes a problem in that the sealing performance for the engine oil falls. In addition, when the sulfur content is less than 1.0%, there is a problem that the oil resistance is poor because the vulcanization is not good, and when the sulfur content exceeds 9.0%, there is a problem that the heat resistance is poor.

In the present invention, by adding a super clay mainly composed of SiO ₂ as a reinforcing material, the heat resistance is excellent, and if the content is less than 1 part by weight, there is a problem of poor heat resistance. there is a problem.

In addition, as an antioxidant, carbowax, paraffin wax, and the like are used. If the content is less than 1 part by weight, there is a problem that the physical properties are lowered, and if it exceeds 10 parts by weight, there is a problem that the tensile strength is lowered.

The outer rubber layer contains 1 to 100 parts by weight of super clay and 1 to 10 parts by weight of antioxidant based on 100 parts by weight of silicone rubber.

The silicone rubber has the characteristics of durability, ozone resistance, and heat resistance, and in the present invention, it is made of 70 to 90% by weight of silicon and 30 to 10% by weight of hydrocarbon, and if silicon is less than 70% by weight, heat resistance, ozone resistance, There exists a problem of low temperature property, and when it exceeds 90 weight%, there exists a problem that low temperature and elasticity fall. In addition, if the hydrocarbon is less than 10% by weight, there is a problem that the heat resistance, ozone resistance, and durability is lowered, and if it exceeds 30% by weight, there is a problem that the engine oil resistance, heat resistance, cold resistance is lowered.

In addition, the super clay and the antioxidant used for the outer rubber layer are used for the same purpose as the reason and content used in the inner rubber layer.

On the other hand, the packing rubber of the present invention includes 0 to 50 parts by weight of carbon black and 0 to 5 parts by weight of an antioxidant, based on 100 parts by weight of rubber, respectively, in the inner rubber layer and the outer rubber layer. The carbon black is FEF (FAST EXTRUSION FURNACE) when the amount of use exceeds 50 parts by weight is advantageous in terms of strength, but there is a problem that the elastic force which is the main function of the rubber falls. The anti-aging agent is added to improve heat resistance, and if the amount of the anti-aging agent exceeds 5 parts by weight, low temperature and engine oil resistance are deteriorated, and there is a problem in that no vulcanization occurs. And, as the anti-aging agent 6-ethoxy-1,2-dihydro-2,2,4-trimethylquinoline, phenyl-1-naphthylamine, alkylated diphenylamine, p (p-toluenesulfonylamide) Diphenylamine and the like can be used.

On the other hand, the oil filter packing rubber of the present invention in addition to the above components as a conventional additive component, processing oil (15 to 60 parts by weight), softener (5 to 15 parts by weight), vulcanization accelerator (0 to 3 parts by weight), vulcanization It can be prepared including the agent (0.5 to 2 parts by weight).

Rubber for automobile engine oil filter packing of the present invention is obtained by the vulcanization of the inner rubber layer and the outer rubber layer, the vulcanization of the vulcanization at this time the sulfur component contained in the rubber chemical reaction occurs at the mutual contact site when both rubbers This is done by vulcanization.

As described above, the present invention is a material of rubber for engine oil filter pack, but instead of using nitrile-butadiene rubber having characteristics of engine oil resistance, weather resistance and impact resistance but having poor heat resistance and cold resistance, acrylic rubber having heat resistance and cold resistance and durability and resistance By using silicone rubber having ozone resistance and heat resistance, it is excellent in heat resistance, cold resistance and durability, thereby reducing heat curing, leakage and cracking of the engine oil filter packing.

Hereinafter, the present invention will be described in more detail with reference to the following Examples, which are not intended to limit the present invention.

Examples 1-4 and Comparative Examples

Next, a rubber composition was prepared by a method of preparing a conventional rubber composition using the ingredients and contents shown in Table 1 below. Using this rubber composition, the packing for the engine oil filter was manufactured in the same manner as in the prior art. In the case of the embodiment, the packing for the engine oil filter was manufactured by vulcanizing and bonding the rubber composition of the inner rubber layer and the outer rubber layer.

Experimental Example

Physical properties of the packing rubber according to the Examples and Comparative Examples were measured by the following methods, and the results are shown in Table 2 below.

[Test Methods]

1. Hardness

In accordance with JIS K 6301, Clause 5.2.3.

2. Tensile Strength

According to JIS 3.4 of JIS K 6301 which is JIS standard.

3. Elongation

According to JIS 3.4 of JIS K 6301 which is JIS standard.

4. Heat resistance

In accordance with JIS K 6301, Clause 6.6.3.

5. Ozone Resistance

In accordance with JIS K 6301, Clause 16.4.

6. Cold resistance

After test condition (temperature, time), check the presence of crack by tensioning 20% of length.

7.AIR LEAK TEST

Measure LEAK pressure at a pressurization rate of 1.5 MPa / min.

8. Withstand pressure test

Measure the LEAK pressure with a pressurized speed of 1.5 MPa / min with engine oil.

9. Low temperature breakdown pressure test

The LEAK pressure is measured at a pressurization rate of 1.5 MPa / min at -40 ° C.

10. Breakdown pressure test

Burst pressure is measured at a pressurization rate of 1.5 MPa / min with engine oil.

As shown in Table 2, the embodiment according to the method of the present invention showed that the target hardness value of 80 Hs or less to prevent curing after aging at 135 ℃, 72 hours, elongation change rate is -40% It can be seen that the heat resistance is excellently improved below. In addition, cracks did not occur as a result of heat resistance measurement at 135 ° C. for 200 hours, and cracks did not occur even in the ozone resistance measurement evaluation. As a result of pressure-related measurement, the performance was significantly improved compared with the conventional case.

As described above, the engine oil filter packing rubber of the automobile of the present invention has a much improved sealing performance against engine oil, compared to a conventional packing rubber mainly composed of nitrile butadiene rubber, so that the vehicle can be operated for a long time under severe temperature conditions such as cold weather. Even during operation, the engine oil leaks and cracks are reduced and physical properties such as heat resistance and cold resistance are excellent.

Claims (5)

In the rubber for automobile engine oil filter packing of a material containing carbon black, reinforcing material, processing oil, antioxidant, softener and vulcanizing agent as an additive to the rubber component, An inner rubber layer including 1 to 100 parts by weight of super clay and 1 to 10 parts by weight of antioxidant based on 100 parts by weight of acrylic rubber; Exterior rubber layer containing 1 to 100 parts by weight of super clay and 1 to 10 parts by weight of antioxidant based on 100 parts by weight of silicone rubber Rubber for automobile engine oil filter packing, characterized in that made by vulcanization adhesion. The rubber for automobile engine oil filter packing according to claim 1, wherein the acrylic rubber has an acrylic content of 34 to 43% and a sulfur content of 1.0 to 9.0%. 2. The rubber for automobile engine oil filter packing according to claim 1, wherein the silicone rubber is made of 70 to 90 wt% of silicon and 30 to 10 wt% of hydrocarbons. The rubber for vehicle engine oil filter packing according to claim 1, further comprising 0 to 50 parts by weight of carbon black in the inner rubber layer and the outer rubber layer, based on 100 parts by weight of rubber. The rubber for automobile engine oil filter packing according to claim 1, further comprising 0 to 5 parts by weight of an anti-aging agent based on 100 parts by weight of rubber in the inner rubber layer and the outer rubber layer.