KR20130114767A - Tire tread rubber composition - Google Patents
Tire tread rubber composition Download PDFInfo
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- KR20130114767A KR20130114767A KR1020120037037A KR20120037037A KR20130114767A KR 20130114767 A KR20130114767 A KR 20130114767A KR 1020120037037 A KR1020120037037 A KR 1020120037037A KR 20120037037 A KR20120037037 A KR 20120037037A KR 20130114767 A KR20130114767 A KR 20130114767A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/24—Homopolymers or copolymers of amides or imides
- C08L33/26—Homopolymers or copolymers of acrylamide or methacrylamide
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
The present invention relates to a rubber composition for tire treads, and more particularly, to a rubber composition for tire treads that can improve braking force in snow, ice or rain, as compared to conventional rubber treads for tire treads.
Conventionally, rubber having high content of vinyl in the structure constituting butadiene of styrene butadiene rubber and solution-polymerized styrene butadiene rubber having high styrene content in rubber compositions used in treads to enhance tire performance on snowy roads, ice or wet roads. Each was used, or they were used together. However, all of these methods have a problem in that the production cost of the rubber composition is increased due to a complicated manufacturing process and the production cost of the rubber composition is increased due to a complicated manufacturing process. There was a limit to improving rain performance.
The technical problem to be solved by the present invention is to provide a tire tread rubber composition that can improve the braking force in snow, ice or rain compared to the conventional rubber tread composition.
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems,
In a rubber composition for tire tread comprising raw rubber, reinforcing agent and filler, polyacryl amide (Potasacium Ammonium), potassium polyacrylate, polyacrylic acid (Polyacrylic Acid) crosslinked with respect to 100 parts by weight of the raw material rubber It provides a rubber composition for a tire tread comprising 5 to 40 parts by weight of at least one superhydrophilic resin selected from the group consisting of sodium polyacrylate (Sodium Polyacrylate) and.
According to one embodiment of the invention, 40 to 50 parts by weight of silica as a reinforcing agent, layered silicate as a filler, syndiotactic-1,2-polybutadiene (syndiotactic-1,2-polybutadiene (SPB) or The plate graphite may further include 5 to 30 parts by weight.
According to another embodiment of the present invention, the silica has a BET surface area whose surface is modified with silanetriol is 110 to 130 m 2 / g, and the silane triol is 5 to 50 parts by weight based on 100 parts by weight of the silica Can be.
According to another embodiment of the present invention, the layered silicate has a layer spacing of 0.1 to 10 nm, montmorillonite, saponite, hectorite, rectorite, vermiculite ( at least one selected from the group consisting of vermiculite, mica, illite, kaolinite, sodium montmorillonite (Na-MMT) and claisite 15A, Ca 2 +, Mg 2 +, Ni 2 +, Zn 2 +, Cu 2 + or Al 3 + and, tetradecyl amine (tetradecylamine), hexadecyl amine (hexadecylamine), octadecyl amines and their salts, such as amine (octadecylamine), Dimethyldistearylammonium, trimethyltetradecyl ammonium, trimethylhexadecyl ammonium, trimethyloctadecyl ammonium, benzyl tree Butyl ammonium (benzyltrimethyl ammonium), benzyltriethylammonium (benzyltriethyl ammonium), phenyl trimethyl ammonium (phenyltrimethyl ammonium) and the interlayer may be a whole or in part, modified with such alkyl and aromatic quaternary ammonium or cationic surfactants.
According to another embodiment of the present invention, the plate graphite may have a width of 0.1 to 20 nm.
According to another embodiment of the present invention, the layered silicate and plate graphite may have a flat ratio of 5 to 100, respectively.
According to another embodiment of the present invention, hydrocarbon or zinc 솝 may be further included as a dispersing aid.
The rubber composition for tire treads according to the present invention can improve braking force in snow, ice or rain.
As described below, the present invention will be described by way of example, but it is merely illustrative, and those skilled in the art to which the present invention pertains that various modifications and equivalent other embodiments are possible. I will understand. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
The rubber composition for tire treads according to the present invention is a rubber composition for tire treads comprising a raw material rubber, a reinforcing agent and a filler, wherein the polyacryl amide (Polyacryl Amide), potassium polyacrylate crosslinked with respect to 100 parts by weight of the raw material rubber (Potassium Polyacrylate), polyacrylic acid (Polyacrylic Acid) and sodium polyacrylate (Sodium Polyacrylate) at least one selected from the group consisting of 5 to 40 parts by weight of a superhydrophilic resin, 40 to 50 parts by weight of silica as the reinforcing agent, The filler comprises 5 to 30 parts by weight of layered silicate, syndiotactic-1,2-polybutadiene (SPB) or plate graphite.
The raw material rubber may be used natural rubber or synthetic rubber, the synthetic rubber is not particularly limited to use, the 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, hypallon rubber, chloroprene rubber, ethylene vinyl acetate rubber, acrylic rubber, hydrin rubber, vinyl benzyl chloride styrene butadiene rubber, bromomethyl styrene Butyl rubber, styrene butadiene rubber maleic acid, styrene butadiene rubber carboxylic acid, An epoxy isoprene rubber, at least one selected from maleic acid ethylenepropylene rubber, carboxylic acid nitrile-butadiene rubber, and the group of BIMS (brominated polyisobutyl isoprene-co-paramethyl styrene) can be used.
In addition, based on 100 parts by weight of the raw material rubber selected from the group consisting of cross-linked polyacryl amide (Polyacryl Amide), potassium polyacrylate (Potassium Polyacrylate), polyacrylic acid (Polyacrylic Acid) and sodium polyacrylate (Sodium Polyacrylate) 5 to 40 parts by weight of at least one superhydrophilic resin may be used, but outside this range, it may be difficult to improve braking force on snow, ice or wet road surfaces. If less than 5 parts by weight of the hydrophilic expression on the surface of the tire is not expected to improve the water film phenomenon, and if more than 40 parts by weight of the tire rubber properties are significantly reduced and the braking force can be reduced.
In addition, the amount of silica used as the reinforcing agent is 40 to 50 parts by weight based on 100 parts by weight of the raw material rubber, if less than 40 parts by weight, the reinforcement performance is insufficient, the physical properties may not meet the expectations If the amount exceeds 50 parts by weight, a large amount of silica that is not bonded with rubber may be generated, which may drastically reduce physical properties.
In addition, the surface of the silica is modified with a silane triol, the BET surface area is 110 to 130 m 2 / g, the silane triol may be used 5 to 50 parts by weight based on 100 parts by weight of the silica, If less than parts by weight, the degree of chemical reaction is insignificant It is difficult to expect improvement in performance, and on the contrary, if it exceeds 50 parts by weight, a residual amount of reaction may occur, thereby reducing the physical properties of the rubber.
Meanwhile, the layered silicate, syndiotactic-1,2-polybutadiene (SPB), or plate graphite is used as a filler, and the layered silicate has a layer spacing of 0.1 to 10 nm, montmorillonite, saponite, hectorite, rectorite, vermiculite, mica, illite, kaolinite, at least one selected from the group consisting of sodium montmorillonite (sodium montmorillonite, Na-MMT) and the claw not agent 15A (Cloisite 15A), Ca 2+ , Mg 2 +, Ni 2 +, Zn 2 +, Cu 2 + or Al 3 + And tetradecylamine, hexadecylamine, octadecylamine or octadecylamine or salts thereof, dimethyldistearylammonium, trimethyltetradecyl ammonium, trimethylhexadecyl Alkyl and aromatic quaternary ammonium or cationic interfaces that are ammonium (trimethylhexadecyl ammonium), trimethyloctadecyl ammonium, benzyltrimethyl ammonium, benzyltriethyl ammonium or phenyltrimethyl ammonium As the activator, one or all of the interlayers may be modified, which may be performed by a conventional dry method.
In particular, the above interlayer structure is stabilized by various interactions, such as electrostatic interaction, interlayer complexation with cations present in inorganic lattice layers, and hydrogen bonds. ), Such as van der Waals interactions and electric dipole interactions between hydrophobic interlayers and hydrophobic active ingredients. Such layered silicates serve to prevent physical property degradation due to mixing of the superhydrophilic resin.
Here, the layered silicate has a layer spacing of 0.1 to 10 nm, if it is less than 0.1 nm, the interlayer is too narrow so that rubber cannot be introduced onto the layer so that reinforcing performance cannot be expressed. It is hard to expect reinforcement performance due to layer
The 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.
On the other hand, the plate graphite may be used having a thickness of 0.1 to 10 nm, if less than 0.1 nm, the strength of the plate graphite is weak, it is difficult to expect reinforcing performance, on the contrary, if it exceeds 10 nm, the rubber and bond weakened This can cause problems that can cause physical properties to decline.
Here, the layered silicate and plate graphite may have a flattening ratio of 5 to 100, wherein the flattening ratio refers to a ratio of the plane width to the thickness, if the flattening ratio is less than 5, If the characteristic is hard to be expressed and, on the contrary, exceeds 100, a drop in physical properties may occur.
In addition, 5 to 30 parts by weight of the layered silicate, syndiotactic-1,2-polybutadiene (SPB) or plate graphite may be used, if less than 5 parts by weight. However, the content is too small to express the properties of the material, on the contrary, if it exceeds 30 parts by weight, a drop in physical properties may occur.
On the other hand, as a dispersion aid to induce a uniform dispersion of the silica may be used hydrocarbon (hydrocarbon) or zinc 솝 (Zn soap), the hydrocarbon is preferably 1 to 10 carbon atoms.
≪ Example 1 >
Sodium polyacrylate cross-linked with 45 parts by weight of carbon black, 45 parts by weight of silica, 35 parts by weight of process oil, and a superhydrophilic resin based on 100 parts by weight of raw rubber comprising 50 parts by weight of natural rubber and 50 parts by weight of styrene butadiene rubber. 5 parts by weight of polyacrylate), 5 parts by weight of vermiculite intermodified with magnesium cation and tetradecylamine by dry method, 3 parts by weight of hexamethyldisilazane (HMDZ) as silica dispersant, 3 parts by weight of zinc oxide (ZnO), stearic acid (stearic acid) 2 parts by weight, wax (1.5 parts by weight), 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. Next, 2 parts by weight of sulfur as a vulcanizing agent, 1 part by weight of N-cyclohexyl-2-benzothiazole-sulfenamide (CZ) and 0.2 parts by weight of vulcanization retardant (PVI) were added to the rubber compound as the vulcanizing agent. Rubber specimens were prepared by vulcanization at 160 ° C. for 20 ± 5 minutes.
In the carbon black, iodine adsorption was used at 140 ± 5g / kg, DBP adsorption is 130 ± 5ml / 100g, the coloration of 127%, silica is BET modified with silane triol (20 parts by weight based on 45 parts by weight of silica) One having a surface area of 120 ± 5 m 2 / g was used.
<Example 2>
Rubber specimens were used in the same manner as in Example 1, except that syndiotactic-1,2-polybutadiene (SPB) having an average diameter of 0.1 µm and a specific surface area of 80 to 90 m 2 / g was used instead of vermiculite. Was prepared.
<Example 3>
A rubber specimen was manufactured in the same manner as in Example 1, except that plate graphite having an average width of 10 nm and a flat ratio of 10 was used instead of vermiculite, and 2 parts by weight of zinc soap (Zn soap) was used. .
<Comparative Example>
45 parts by weight of carbon black, 45 parts by weight of silica, 35 parts by weight of process oil, and bis- (3-triethoxysilylpropyl as silica dispersant based on 100 parts by weight of raw rubber comprising 50 parts by weight of natural rubber and 50 parts by weight of styrene butadiene rubber 3 parts by weight of tetrasulfane (TESPT), 3 parts by weight of zinc oxide (ZnO), 2 parts by weight of stearic acid, 1.5 parts by weight of wax, N- (1,3-dimethylbutyl)-as an antioxidant 2 parts by weight of N'-phenyl-p-phenylenediamine was placed in a Banbury mixer and blended to obtain a rubber compound. Next, 2 parts by weight of sulfur as a vulcanizing agent, 1 part by weight of N-cyclohexyl-2-benzothiazole-sulfenamide (CZ) and 0.2 parts by weight of vulcanization retardant (PVI) were added to the rubber compound as the vulcanizing agent. Rubber specimens were prepared by vulcanization at 160 ° C. for 20 ± 5 minutes.
In the carbon black, iodine adsorption was used at 140 ± 5g / kg, DBP adsorption is 130 ± 5ml / 100g, the coloration of 127%, silica was used BET surface area of 120 ± 5㎡ / g.
<Test Example>
Tensile properties such as hardness, 300% modulus, tensile strength (TS), and elongation balance (EB) of the rubber specimens prepared in Examples 1 to 3 and Comparative Examples Is measured by ASTM-related regulations and the result and the rubber produced in Examples 1 to 3 and Comparative Examples as the tire tread rubber, water surface for each tire (Snow), snow (snow), ice sheet The braking force on wet roads such as (Ice) was measured and the results are shown in Table 1 below.
In Table 1, the tensile properties, the braking force, and the like of the examples are converted to values when the tensile properties, the braking force, and the like of the comparative example are 100, and the higher the value, the better the characteristics.
Compared with the rubber of the comparative example, the rubber of the embodiment according to the present invention, in the case of Examples 1 to 3, the road surface, the snow (Snow), the ice (Ice) with the water (Even) with the same level of tensile properties It can be seen that the braking force on the wet road (Wet Road) is excellent.
Claims (7)
At least one selected from the group consisting of polyacrylamide, potassium polyacrylate, polyacrylic acid, and sodium polyacrylate, which are crosslinked with respect to 100 parts by weight of the raw rubber A rubber composition for tire treads, comprising 5 to 40 parts by weight of phosphorus superhydrophilic resin.
The rubber composition for the tire tread includes 40 to 50 parts by weight of silica as a reinforcing agent, layered silicate, syndiotactic-1,2-polybutadiene (SPB) or plate graphite as a filler. A rubber composition for a tire tread, characterized in that it further comprises 5 to 30 parts by weight.
The silica has a BET surface area of 110 to 130 m 2 / g, the surface of which is modified with silane triol, and the silane triol is used in a tire tread, wherein 5 to 50 parts by weight is used based on 100 parts by weight of the silica. Composition.
The layered silicate has a layer spacing of 0.1 to 10 nm, montmorillonite, saponite, hectorite, rectorite, vermiculite, mica, and illite. (illite), a nitro kaolin (kaolinite), sodium montmorillonite (sodium montmorillonite, Na-MMT) at least one selected from the group consisting of chloride and not bit 15A (Cloisite 15A), Ca 2+ , Mg 2 +, Ni 2 +, Zn 2 +, Cu 2 + or Al 3 + and, tetradecyl amine (tetradecylamine), hexadecyl amine (hexadecylamine), octadecyl amine (octadecylamine) amines and their salts, dimethyl distearyl ammonium (dimethyldistearylammonium), such as trimethyl Tetramethyltetradecyl ammonium, trimethylhexadecyl ammonium, trimethyloctadecyl ammonium, benzyltrimethyl ammonium, benzyl Lee ammonium acetate (benzyltriethyl ammonium), phenyl trimethyl ammonium (phenyltrimethyl ammonium), such as alkyl and aromatic quaternary ammonium or cationic surfactant interlayer is all or tire, characterized in that the part of the modified rubber composition for a tread.
The plate graphite is a rubber composition for tire tread, characterized in that the width of 0.1 to 20nm.
The layered silicate and the plate graphite, respectively, the flatness ratio of the tire tread rubber composition, characterized in that 5 to 100.
A rubber composition for tire treads, further comprising hydrocarbon or zinc 로 as a dispersing aid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120037037A KR20130114767A (en) | 2012-04-10 | 2012-04-10 | Tire tread rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120037037A KR20130114767A (en) | 2012-04-10 | 2012-04-10 | Tire tread rubber composition |
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| Publication Number | Publication Date |
|---|---|
| KR20130114767A true KR20130114767A (en) | 2013-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020120037037A KR20130114767A (en) | 2012-04-10 | 2012-04-10 | Tire tread rubber composition |
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| KR (1) | KR20130114767A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111051426A (en) * | 2017-08-31 | 2020-04-21 | Nok株式会社 | Acrylic rubber composition |
| KR102236872B1 (en) * | 2019-11-13 | 2021-04-06 | 넥센타이어 주식회사 | Rubber composition for tire tread and Tire comprising the rubber composition |
-
2012
- 2012-04-10 KR KR1020120037037A patent/KR20130114767A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111051426A (en) * | 2017-08-31 | 2020-04-21 | Nok株式会社 | Acrylic rubber composition |
| CN111051426B (en) * | 2017-08-31 | 2021-02-26 | Nok株式会社 | Acrylic rubber composition |
| KR102236872B1 (en) * | 2019-11-13 | 2021-04-06 | 넥센타이어 주식회사 | Rubber composition for tire tread and Tire comprising the rubber composition |
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