KR20100099517A - Tire tread rubber composition comprising halloysite nano clay - Google Patents

Abstract

PURPOSE: A tire tread rubber composition is provided to improve wet traction and rotation resistance at a wet road by removing a water film at the wet road through spike effect and capillary effect of halloysite nanoclays. CONSTITUTION: A tire tread rubber composition includes 0.5-50 parts by weight of halloysite nanoclays based on 100.0 parts by weight of a crude rubber. The halloysite nanoclays have a longitudinal hallow center, a diameter of 10-50 nm, and a length of 0.5-5 microns. The length between nanoclays within the hollow is 5-10 angstroms and the diameter between the nanoclays is 10-50 nm. The length between the nanoclays is 0.5-5 microns.

Description

Tire tread rubber composition comprising halloysite nano clay

The present invention relates to a tire tread rubber composition comprising a tube structure nano clay, and more particularly, to a tire tread rubber composition comprising a tube structure nano clay so that the tube structure nano clay has its own. Wet traction and rolling resistance on wet roads such as snow, ice and / or water by removing water film from wet roads by spike and capillary effects (rolling resistance) relates to a tire tread rubber composition that can improve the characteristics.

Rubber is deformed or recovered depending on the force applied to it, so it is used in various products such as tires, conveyors, belts and shoes by using the properties of such rubber.

Among the rubber-based products, the tire is a means for supporting and moving the vehicle, and particularly has a close influence on the driving state of the vehicle and the driver's safety.

The main components of the tire include a tread, which is in contact with the ground externally, and a sidewall, which holds the tire, and internally, a cord, a carcass, and a bead. ), Apex and the like.

Since the tire tread portion is a portion that directly contacts the ground during the support and driving of the tire, it is very important for the support and movement of the vehicle among the major components of the tire.

In particular, tire treads often have to stop suddenly due to safety factors when the vehicle is moving, so they need not only good traction, but also snow, ice and / or water when the vehicle is running. Wet traction on wet roads should also be excellent because it often occurs on wet roads such as water.

On the other hand, the rolling resistance characteristics such as the rolling resistance between the tire tread portion and the ground should be good in order to improve the driving ease of the vehicle and fuel economy of the vehicle.

In addition, in terms of economics, characteristics such as anti-abrasion of the tire tread portion should be good.

Among the characteristics of the tire tread portion, many studies have been made to improve these characteristics because the braking force, especially wet traction and rolling resistance, should be good in terms of driver safety and ease of operation of the vehicle.

In the tire tread rubber composition, the present invention comprises a tube structure nano clay to wet on wet roads such as snow, ice and / or water. It is an object of the present invention to provide a tire tread rubber composition that can improve traction and rolling resistance characteristics.

Meanwhile, in the prior art related to the present invention, Korean Patent Laid-Open Publication No. 2004-0050039 includes rotational resistance by adding resin maleed with maleic acid whose indene portion is a reactive group including α-methyl styrene, styrene, and indene as a reactive resin to the tread rubber composition. It was intended to improve wet grip performance without degrading performance.

In Japanese Patent 2005-281390, a fluorine resin composition was applied to a tire tread rubber composition at a volume ratio of 30 to 60% to improve wet performance.

Korean Patent Laid-Open Publication No. 2007-0028869 provides a tire tread rubber composition comprising 5 to 30 parts by weight of a hydrophilic inorganic blend composed of 30 to 70% by weight of clay and 30 to 70% by weight of a polymer in the tread rubber composition, thereby achieving at least equivalent wear resistance. It was intended to improve wet performance while maintaining.

However, there is a limitation in improving the wet performance when the prior art is applied, and these prior arts differ from each other in the configuration of the present invention and the technical configuration.

The present invention provides a tire tread that can improve wet traction and rolling resistance characteristics on wet roads such as snow, ice and / or water. To provide a rubber composition.

The present invention seeks to provide a rubber made of a rubber composition which can improve wet traction and rotational resistance characteristics on wet roads such as snow, ice and / or water.

It is an object of the present invention to provide a tire comprising a rubber composition made of a rubber composition capable of improving wet traction and rolling resistance characteristics on wet road surfaces such as snow, ice and / or water.

In the tire tread rubber composition, the present invention includes a tube structure nano clay to remove water film from wet road surface by its spike effect and capillary effect of the tube structure nano clay. Another object of the present invention is to provide a tire including wet tread on wet roads such as water, a tire tread rubber composition capable of improving rolling resistance characteristics, a rubber made of the rubber composition, and / or a rubber made of the rubber composition.

The present invention can provide a tire tread rubber composition that can improve wet traction and rolling resistance characteristics on wet roads such as snow, ice and / or water.

The present invention can provide a rubber made of a rubber composition capable of improving wet traction and rotational resistance characteristics on wet roads such as snow, ice and / or water.

The present invention can provide a tire comprising a rubber composition made of a rubber composition capable of improving wet traction and rolling resistance characteristics on wet road surfaces such as snow, ice and / or water.

The present invention represents a rubber composition capable of improving wet traction and rolling resistance properties.

The present invention provides a rubber composition capable of improving wet traction and rolling resistance characteristics on wet roads such as snow, ice and / or water. Indicates.

In the tire tread rubber composition, the present invention comprises 0.5-50 parts by weight of a tube structure nano clay with respect to 100 parts by weight of raw material rubber, and is wetted by its own spike effect and capillary effect of the tube structure nano clay. It shows a rubber composition that can remove the water film on the road surface and improve wet traction and rolling resistance characteristics on wet road surfaces such as snow, ice and / or water.

In the above, the raw material rubber can be used as long as it can be used as the raw material rubber in the conventional tire tread rubber composition.

In the above, the raw material rubber may be used alone.

In the above, the raw material rubber may be used alone.

In the above, the raw rubber may be a mixed rubber mixed with natural rubber and synthetic rubber.

The raw rubber may be mixed rubber mixed with natural rubber and synthetic rubber in a weight ratio of 1 to 99:99 to 1.

The raw rubber may be a mixed rubber mixed with natural rubber and synthetic rubber in the weight ratio of 5 to 95: 95 to 5.

The raw rubber may be mixed rubber mixed with natural rubber and synthetic rubber in a weight ratio of 10 to 90:90 to 10.

The raw rubber may be mixed rubber mixed with natural rubber and synthetic rubber in a weight ratio of 20 to 80:80 to 20.

The raw rubber may be mixed rubber mixed with natural rubber and synthetic rubber in a weight ratio of 30 to 70:70 to 30.

The raw rubber may be a mixed rubber mixed with natural rubber and synthetic rubber in a weight ratio of 40 to 60: 60 to 40.

In the above raw material rubber, natural rubber and synthetic rubber may be mixed rubber mixed in a weight ratio of 50:50.

In the above, the raw rubber may be a mixed rubber in which two or more different kinds of synthetic rubbers are mixed.

In the above raw material rubber, two or more different types of synthetic rubber may be used in a mixed rubber in the same weight ratio.

Synthetic rubber is styrene butadiene rubber (SBR), modified styrene butadiene rubber, butadiene rubber (BR), modified butadiene rubber, chlorosulfonated polyethylene rubber, epichlorohydrin rubber, fluorine rubber, silicone rubber, nitrile rubber, hydrogenated Nitrile rubber, nitrile butadiene rubber (NBR), modified nitrile butadiene rubber, chlorinated polyethylene rubber, styrene ethylene butylene styrene (SEBS) rubber, ethylene propylene rubber, ethylene propylene diene (EPDM) rubber, hypalon rubber, chloroprene rubber, Ethylene vinyl acetate rubber, acrylic rubber, hydrin rubber, vinyl benzyl chloride styrene butadiene rubber, bromomethyl styrene butyl rubber, maleic acid styrene butadiene rubber, carboxylic acid styrene butadiene rubber, epoxy isoprene rubber, maleic acid ethylene propylene rubber, carbon Nitric acid butadiene rubber and brominated polyisobutyl isoprene- any one or more selected from the group of co-paramethyl styrene) may be used.

Tube structure nanoclay, which is an essential component in the tire tread rubber composition of the present invention, is defined as a nano clay having a structure in which the center in the longitudinal direction is hollow.

In the tire tread rubber composition of the present invention, the tube structure nanoclay, which is an essential component, uses a nano clay having a hollow structure in the longitudinal direction, or a hollow hollow in the longitudinal direction, and another hollow inside the hollow. Two or more nanoclays (see FIG. 1) can be used.

In the present invention, when the center in the longitudinal direction is hollow, and when the nano clay of the tube structure of two or more hollows in the hollow is used, the length between the other hollows in the hollow may be 5 to 10 mm 3.

Tube structure nanoclay in the present invention can be used with a diameter of 10 to 50nm.

Tube structure nanoclay in the present invention can be used that is 0.5 to 5㎛ in length.

Tube structure nanoclay in the present invention can be used with a diameter of 10 to 50nm, 0.5 to 5㎛ in length.

In the present invention, when the center in the longitudinal direction is hollow, and when the nano clay of the tube structure having two or more hollows inside the hollow is used, the length between the other hollows in the hollow is 5-10 mm, diameter 10-50 nm, length 0.5-5 micrometers can be used.

In the present invention, when the center in the longitudinal direction is hollow, and when the nano clay of the tube structure having two or more hollows inside the hollow is used, the average length between the other hollows in the hollow is 7 Å and the inner diameter is 15 nm in average. And the average length of 0.5-4 micrometers can be used (refer FIG. 1).

In the present invention, the composition of the tube-structured nanoclay is mainly composed of Al ₂ O ₃ and SiO ₂ , and a small amount of Fe ₂ O ₃ , Na ₂ O, K ₂ O, CaO, MgO, TiO _2, or the like may be used. All.

In the present invention, the composition of the tube structure nanoclay includes 35 to 40% of Al ₂ O _{3 and} 45 to 50% of SiO _{2, and the} balance of Fe ₂ O ₃ , Na ₂ O, K ₂ O, CaO, MgO, TiO ₂ And the like may be used.

The tire tread rubber composition of the present invention contains 0.5 to 50 parts by weight, preferably 5 to 40 parts by weight, more preferably 10 to 30 parts by weight of the tube structure nanoclay having the above characteristics with respect to 100 parts by weight of the raw material rubber. May be used.

In the tire tread rubber composition of the present invention, the use of less than 0.5 parts by weight of the tube structure nanoclay with respect to 100 parts by weight of the raw material rubber shows a negligible effect in achieving the object of the invention. Since the physical properties of the composition may be reduced, it is preferable to use 0.5 to 50 parts by weight based on 100 parts by weight of the cylindrical nano-clay raw material rubber.

The tire tread rubber composition of the present invention may use any one or more fillers selected from the group of carbon black and silica to improve abrasion resistance and / or reinforcement.

The tire tread rubber composition of the present invention may use 0.1 to 90 parts by weight, preferably 10 to 80 parts by weight, more preferably 20 to 70 parts by weight of any one or more fillers selected from the group of carbon black and silica.

The filler may be carbon black and silica, respectively, or a mixed filler in which carbon black and silica are mixed in a weight ratio of 1: 9 to 9: 1.

Carbon black may be used as the iodine adsorption 135-145g / kg.

Carbon black may be a DBP adsorption of 125 to 135ml / 100g in the above.

In the above, carbon black can use the thing of 125 to 130% of coloring degree.

In the above, carbon black may have an iodine adsorption of 135 to 145 g / kg, a DBP adsorption of 125 to 135 ml / 100 g, and a coloring degree of 125 to 130%.

In the carbon black, iodine adsorption is 140g / kg, DBP adsorption is 130ml / 100g, the coloration of 127% can be used.

In the above, silica may be used having a BET surface area of 110 ~ 130 m 2 / g.

In the above, the silica may have a CTAB value of 90 to 100 m 2 / g.

As described above, silica may have a BET surface area of 110 to 130 m 2 / g and a CTAB value of 90 to 100 m 2 / g.

In the filler, instead of silica, silica whose surface is treated with silanetriol may be used.

In the above-described silica treated with silane triol, silane triol was treated with 5 to 50% of the silica weight on the surface of silica having a BET surface area of 90 to 100 m 2 / g and a CTAB value of 110 to 130 m 2 / g. Can be used.

The tire tread rubber composition of the present invention may further include a second filler in addition to the carbon black and / or silica in order to further enhance the reinforcement of the rubber composition in addition to the filler of the carbon black and / or silica mentioned above. Can be.

Said 2nd filler can use 5-30 weight part with respect to 100 weight part of raw material rubbers.

The second filler is calcium carbonate, titanium oxide, tungsten, talc, syndiotactic-1,2-polybutadiene, SPB), any one or more selected from the group of plate graphite can be used.

Among the second fillers, syndiotactic-1,2-polybutadiene (SPB) may have a diameter of 0.01 to 0.1 µm and a specific surface area of 80 to 90 m ² / g.

Among the above-mentioned second fillers, syndiotactic-1,2-polybutadiene (SPB) may have a diameter of 1 to 10 µm and a specific surface area of 100 to 120 m ² / g.

Among the second fillers above, plate graphite may have a particle size of 0.1 to 20 µm.

Among the above-mentioned second fillers, plate graphite may be one having an interlayer spacing of 0.1 to 10 nm.

Among the above-mentioned second fillers, the plate graphite may be one having an aspect ratio (l / d) of 5 or more indicating the ratio of the plane width l to the thickness d.

Among the above-mentioned second fillers, plate graphite may have a flattening ratio of 5 to 100.

Among the above-mentioned second fillers, plate graphite may have a particle size of 0.1 to 20 µm, an interlayer spacing of 0.1 to 10 nm, and a flat ratio of 5 to 100.

Among the second fillers, plate graphite may be one obtained from the following steps (a) and (b).

(A) adding and immersing graphite in a mixed solution of sulfuric acid and nitric acid in a weight ratio of 1: 9 to 9: 1,

(B) washing and washing the dried and dried graphite at 700 to 900 ° C. for 1 to 5 minutes after immersion.

In step (a), the immersion is carried out at 60 to 80 ° C. for 10 to 48 hours, preferably at 70 ° C. for 10 hours, so that the -SO ^{4 2-} ion of sulfuric acid or -NO ₃ ^- ion of nitric acid is interposed between the plate graphite layers. Make sure this is fully inserted.

The tire tread rubber composition of the present invention has a coupling agent as a silica dispersant in an amount of 0.5 to 100 parts by weight of the raw material rubber in order to improve the dispersibility of the silica when the silica surface-treated with the filler silica and / or silanetriol is applied. 10 parts by weight could be used.

The coupling agent may be any one or more selected from the group consisting of dimethyl amino ethanol (DMAE) and hexamethyldisilazane (HMDZ) of the following structural formula (1).

(CH ₃ ) ₃ Si-HN-Si (CH ₃ ) ₃ .... Structure (1)

In the tire tread rubber composition of the present invention, 0.1 to 5 parts by weight of a dispersing aid of a silica dispersant for improving the dispersibility of silica surface-treated with silica and / or silanetriol as a filler is used. Can be.

The silica dispersion aid may be a mixture of hydrocarbon, zinc soap (zn soap) and filler (filler) is mixed.

The silica dispersion aid is a hydrocarbon having 1 to 10 carbon atoms; Zinc 솝; And at least one filler selected from the group consisting of glass fiber, silica, wood powder and chalk. A mixture of 1 to 8: 1 to 8: 1 to 8 by weight may be used.

In the silica dispersion aid, the hydrocarbon may be a chain hydrocarbon and / or a cyclic hydrocarbon.

In the tire tread rubber composition of the present invention, the tire tread rubber composition is applied under various conditions such as various components and contents. In order to achieve the object of the present invention, it is understood that the rubber composition for tires under the above-mentioned conditions is preferable. Could.

The tire tread rubber composition of the present invention is a reinforcing filler, activator, anti-aging agent, process oil, vulcanization, which is used in the conventional tire tread rubber composition, in addition to the above-mentioned raw rubber, tube structure nano clay, filler, silica dispersant, and silica dispersant. The various additives, such as a vulcanization accelerator, can be suitably selected as needed, and can be used in predetermined content. However, these are general components used in conventional tire tread rubber compositions, and thus are not essential components of the present invention, and thus the detailed descriptions thereof will be omitted.

On the other hand, the present invention includes a rubber produced by the above-mentioned tire tread rubber composition.

The present invention includes a tire containing a rubber produced by the above-mentioned tire tread rubber composition.

The present invention includes a tire containing as a tread the rubber produced by the above-mentioned tire tread rubber composition.

The tire represents any one selected from a tire for an automobile, a tire for a bus, a tire for a truck, an tire for an aircraft, and a tire for a motorcycle.

Hereinafter, the present invention will be described by the following Preparation Examples, Comparative Examples, Examples, and Test Examples. However, these are not limited to the scope of the present invention by these as an embodiment of the present invention.

≪ Example 1 >

35 parts by weight of carbon black, 35 parts by weight of silica, 3 parts by weight of process oil, 5 parts by weight of nanostructured clay, and 5 parts by weight of silica as a dispersant based on 100 parts by weight of a raw material rubber composed of 50 parts by weight of natural rubber and 50 parts by weight of styrene butadiene rubber. 3 parts by weight of hexamethyldisilazane (HMDZ), 2 parts by weight of zinc oxide (ZnO), 2 parts by weight of stearic acid, N- (1,3-dimethylbutyl) -N as an antioxidant 2 parts by weight of '-phenyl-p-phenylenediamine was added to a Banbury mixer and blended to obtain a rubber compound.

2 parts by weight of sulfur as a vulcanizing agent and 1 part by weight of N-cyclohexyl-2-benzothiazole-sulfenamide (CZ) as a vulcanizing agent was added to the rubber compound and vulcanized at 160 ° C. for 20 ± 5 minutes. Prepared.

In the above carbon iodine adsorption was used as 140 ± 5g / kg, DBP adsorption is 130 ± 5ml / 100g, the coloration of 127%.

In the above silica was used BET surface area of 120 ± 5 m 2 / g, CTAB value of 95 ± 5 m 2 / g.

In the tube structure nanoclay as shown in Figure 1, the average length between the nano clay 7Å, the inner diameter of the inner nanoclay 15nm, the average length of 0.5 ~ 4㎛ was used, wherein the composition of the tube structure nanoclay is the main component Al ₂ O ₃ 35-40%, SiO ₂ 45-50%, as a trace component of the remainder Fe ₂ O ₃ , Na ₂ O, K ₂ O, CaO, MgO, TiO _{2 The} thing consisting of The TEM photograph of the nanoclay is shown in FIG. 2 and the SEM photograph in FIG. 3.

(CH ₃ ) ₃ Si-HN-Si (CH ₃ ) ₃ .... Structure (1)

Table 1 shows the rubber composition of Example 1.

<Example 2>

A rubber specimen was prepared using the same composition and method as Example 1, except that 25 parts by weight of the tube structure nanoclay was used instead of 5 parts by weight.

Table 1 shows the rubber composition of Example 2.

<Example 3>

A rubber specimen was prepared using the same composition and method as Example 1, except that 50 parts by weight of the tube structure nanoclay was used instead of 5 parts by weight.

Table 1 shows the rubber composition of Example 2.

Comparative Example 1

35 parts by weight of carbon black, 35 parts by weight of silica, 3 parts by weight of process oil, and bis- (3-triethoxysilylpropyl as a silica dispersant based on 100 parts by weight of the raw material rubber consisting of 50 parts by weight of natural rubber and 50 parts by weight of styrene butadiene rubber 3 parts by weight of tetrasulfane (TESPT), 2 parts by weight of zinc oxide (ZnO), 2 parts by weight of stearic acid, N- (1,3-dimethylbutyl) -N'-phenyl-p-phenyl as an antioxidant 2 parts by weight of rendiamine was added to a Banbury mixer and blended to obtain a rubber compound.

2 parts by weight of sulfur as a vulcanizing agent and 1 part by weight of N-cyclohexyl-2-benzothiazole-sulfenamide (CZ) as a vulcanizing agent was added to the rubber compound and vulcanized at 160 ° C. for 20 ± 5 minutes. Prepared.

In the above carbon iodine adsorption was used as 140 ± 5g / kg, DBP adsorption is 130 ± 5ml / 100g, the coloration of 127%.

In the above silica was used BET surface area of 120 ± 5 m 2 / g, CTAB value of 95 ± 5 m 2 / g.

Table 1 shows the rubber composition of Comparative Example 1.

Comparative Example 2

A rubber specimen was prepared in the same composition and method as in Comparative Example 1 except that 5 parts by weight of an average clay having an average diameter of 15 ± 5 nm and an average length of 0.1 to 1 μm was further used.

Table 1 shows the rubber composition of Comparative Example 2.

Table 1. Rubber composition of comparative examples and examples (unit: parts by weight)

Item Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Raw material rubber 100 100 100 100 100 Carbon black 35 35 35 35 35 Silica 35 35 35 35 35 Clay (1) - 5 - - - Clay (2) - - 5 25 50 Silica Dispersant (1) 3 3 - - - Silica Dispersant (2) - - 3 3 3 Process oil 3 3 3 3 3 Stearic acid 2 2 2 2 2 Zinc oxide 2 2 2 2 2 Anti-aging 2 2 2 2 2 brimstone 2 2 2 2 2 Vulcanization accelerator One One One One One

* Clay (1): As shown in FIG.

* Clay (2): as shown in Figure 1, the average length of the nanoclay between 7Å, the average diameter of the innermost nanoclay 15nm, the average length of 0.5 ~ 4㎛ was used, wherein the composition of the tube structure nanoclay is the main component _{Al 2 O 3 35~40%, SiO} 2 45~50%, the balance as minor components _{Fe 2 O 3, Na 2 O} , K 2 O, CaO, MgO, tube structure nanoclay consisting of TiO _2.

* Silica Dispersant (1): Bis- (3-triethoxysilylpropyl) tetrasulfane (TESPT)

* Silica Dispersant (2): Hexamethyldisilazane (HMDZ)

<Example 4>

35 parts by weight of carbon black, 35 parts by weight of silica, 3 parts by weight of process oil, 5 parts by weight of nanostructured clay, and 5 parts by weight of silica as a dispersant based on 100 parts by weight of a raw material rubber composed of 50 parts by weight of natural rubber and 50 parts by weight of styrene butadiene rubber. 3 parts by weight of hexamethyldisilazane (HMDZ) of 1), 1 part by weight of a mixture of hexane, zinc 솝 and glass fibers mixed in a weight ratio of 1: 1: 1 as a silica dispersion aid, and zinc oxide 2 parts by weight of (ZnO), 2 parts by weight of stearic acid, and 2 parts by weight of N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine as an anti-aging agent in a Banbury mixer A blend was obtained.

2 parts by weight of sulfur as a vulcanizing agent and 1 part by weight of N-cyclohexyl-2-benzothiazole-sulfenamide (CZ) as a vulcanizing agent was added to the rubber compound and vulcanized at 160 ° C. for 20 ± 5 minutes. Prepared.

In the above carbon iodine adsorption was used as 140 ± 5g / kg, DBP adsorption is 130 ± 5ml / 100g, the coloration of 127%.

In the above silica was used BET surface area of 120 ± 5 m 2 / g, CTAB value of 95 ± 5 m 2 / g.

In the tube structure nanoclay as shown in Figure 1, the average length between the nano clay 7Å, the inner diameter of the inner nanoclay 15nm, the average length of 0.5 ~ 4㎛ was used, wherein the composition of the tube structure nanoclay is the main component Al ₂ O ₃ 35-40%, SiO ₂ 45-50%, as a trace component of the remainder Fe ₂ O ₃ , Na ₂ O, K ₂ O, CaO, MgO, TiO _{2 The} thing consisting of The TEM photograph of the nanoclay is shown in FIG. 2 and the SEM photograph in FIG. 3.

(CH ₃ ) ₃ Si-HN-Si (CH ₃ ) ₃ .... Structure (1)

Table 2 shows the rubber composition of Example 4.

<Example 5>

A rubber specimen was prepared using the same composition and method as Example 4, except that 15 parts by weight of the tube structure nanoclay was used instead of 5 parts by weight.

Table 2 shows the rubber composition of Example 5.

<Example 6>

A rubber specimen was manufactured using the same composition and method as in Example 4, except that 30 parts by weight of the tube structure nanoclay was used instead of 5 parts by weight.

Table 2 shows the rubber composition of Example 6.

<Example 7>

A rubber specimen was prepared using the same composition and method as Example 4, except that 45 parts by weight of the tube structure nanoclay was used instead of 5 parts by weight.

Table 2 shows the rubber composition of Example 7.

<Example 8>

A rubber specimen was prepared using the same composition and method as Example 4, except that 50 parts by weight of the tube structure nanoclay was used instead of 5 parts by weight.

Table 2 shows the rubber composition of Example 8.

Table 2. Rubber composition of comparative examples and examples (unit: parts by weight)

Item Example 4 Example 5 Example 6 Example 7 Example 8 Raw material rubber 100 100 100 100 100 Carbon black 35 35 35 35 35 Silica 35 35 35 35 35 Tube structure nanoclay 5 15 30 45 50 Silica dispersant 3 3 3 3 3 Silica Dispersion Aid One One One One One Process oil 3 3 3 3 3 Stearic acid 2 2 2 2 2 Zinc oxide 2 2 2 2 2 Anti-aging 2 2 2 2 2 brimstone 2 2 2 2 2 Vulcanization accelerator One One One One One

<Test Example 1>

Hardness, 300% modulus, tensile strength (TS), and elongation rate for each rubber specimen prepared by the composition of Examples 1, 2, 3 and Comparative Examples 1, 2 Tensile properties such as (elongation balance, EB) were measured by ASTM-related regulations and the results are shown in Table 3 below.

Table 3. Physical Properties of Rubber Specimen of Examples 1, 2, 3 and Comparative Examples 1, 2

Properties Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Seal
Properties Hardness 100 100 100 100 102 300% modulus 100 104 105 103 105 The tensile strength 100 101 102 103 104 Elongation 100 100 102 102 104

* The physical properties of Comparative Example 2, Example 1, Example 2, and Example 3 in Table 3 means that the higher the numerical value, the better the physical properties when the physical property value of Comparative Example 1 is 100. .

<Test Example 2>

Each rubber manufactured according to the compositions of Examples 1, 2, and 3 and Comparative Examples 1 and 2 is a tire tread rubber, and wet surfaces such as roads, ice, etc., with water for each tire. Wet traction and rolling resistance characteristics on the wet road were measured, respectively, and the results are shown in Table 4 below.

Table 4. Wet traction and rolling resistance characteristics of the rubber specimens of Examples 1, 2, 3 and Comparative Examples 1,2

Properties Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Wet traction Wet 100 101 107 109 113 Ice 100 101 106 108 111 Rolling resistance 100 105 120 120 124

* In Table 4, the numerical values of the wet traction and rotation resistance characteristics of Comparative Example 2, Example 1, Example 2, and Example 3 were converted into conversion values when the wet traction and rotation resistance characteristic values of Comparative Example 1 were set to 100. Higher value means better physical properties.

Rubber of Examples 1, 2 and 3 including the tube structure nano clay of the present invention as shown in Tables 3 and 4, compared with the rubber of Comparative Example 1 and the comparative example 2 applying the normal clay without using the tube structure nano clay It can be seen that the wet traction and rolling resistance characteristics on wet roads such as roads with water, snow roads, etc., while having equivalent tensile properties or more, are excellent.

According to the present invention, a tire tread rubber composition having excellent wet traction and rolling resistance characteristics on wet roads can be obtained, and when applied to a tire, a tire having excellent wet traction and rolling resistance characteristics on wet roads can be obtained. have.

By providing a tire having excellent wet traction and rolling resistance characteristics on the wet road surface including the rubber made of the tire tread rubber composition of the present invention, it is possible to contribute to safer driving for the drivers.

1 is a schematic view showing the tube structure nanoclay of the present invention.

2 is a TEM photograph showing the tube structure nanoclay used in Example 1.

3 is a SEM photograph showing the tube structure nanoclay used in Example 1.

4 is a schematic view showing the structure of ordinary clay.

Claims (5)

In the tire tread rubber composition, A tire tread rubber composition comprising 0.5 to 50 parts by weight of a tube structure nano clay with respect to 100 parts by weight of raw material rubber. The method of claim 1, wherein the tube structure nanoclay is a nanoclay having a hollow structure in the longitudinal direction of 10 to 50nm in diameter, 0.5 to 5㎛ in length or the hollow in the longitudinal direction and another inside the hollow A tire tread rubber composition using nanoclay having a structure in which at least two hollows are used, having a length of 5-10 mm, a diameter of 10-50 nm, and a length of 0.5-5 μm between nanoclays in the hollow. The tire tread rubber composition according to claim 1, further comprising 0.1 to 90 parts by weight of any one or more fillers selected from the group consisting of carbon black and silica. A rubber comprising the rubber composition of claim 1. A tire comprising a rubber consisting of the rubber composition of claim 1.

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