KR101196308B1 - Tire inner liner rubber composition comprising liquid phase polybutene for improving anti-air permeability - Google Patents
Tire inner liner rubber composition comprising liquid phase polybutene for improving anti-air permeability Download PDFInfo
- Publication number
- KR101196308B1 KR101196308B1 KR20100099877A KR20100099877A KR101196308B1 KR 101196308 B1 KR101196308 B1 KR 101196308B1 KR 20100099877 A KR20100099877 A KR 20100099877A KR 20100099877 A KR20100099877 A KR 20100099877A KR 101196308 B1 KR101196308 B1 KR 101196308B1
- Authority
- KR
- South Korea
- Prior art keywords
- rubber
- weight
- parts
- inner liner
- rubber composition
- Prior art date
Links
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The present invention relates to a tire inner liner rubber composition including liquid phase polybutene to improve anti-air permeability. More specifically, in a tire inner liner rubber composition, 100 weight of raw rubber It is related with the tire inner liner rubber composition which contains 10-20 weight part of liquid polybutenes with respect to parts, and improved air permeability and a physical property.
Description
The present invention relates to a tire inner liner rubber composition including liquid phase polybutene to improve anti-air permeability. More specifically, in a tire inner liner rubber composition, 100 weight of raw rubber It is related with the tire inner liner rubber composition which contains 10-20 weight part of liquid polybutenes with respect to parts, and improved air permeability and a physical property.
Rubber-based products are used in various fields.
When manufacturing a rubber-based product, rubber is not only used as a rubber component, but rubber is manufactured using various additives in consideration of the characteristics of the product used, and this rubber is used as a main material in products in various fields. .
Tires, a means of supporting and moving cars, use a variety of rubber products depending on the visible and invisible interior parts.
Conventionally, various oils are used as one of additives to improve fairness in order to obtain an optimal rubber product in a compounding process in which an additive is added to rubber to prepare rubber. These oils are used to facilitate the blending of rubber and reinforcing agents. Examples of such oils include aromatic oils, paraffin oils, and the like.
Tires are important for the characteristics of each part, and various additives are selected and used for the characteristics of the tire part.
The inner liner in the tire part maintains the air in the tire in place of the tube inside the tire, so the air tightness should be excellent, that is, excellent air permeability.
Therefore, the rubber of the inner liner is a situation in which a rubber having excellent air permeability is used as the raw material rubber.
However, in the case of the inner liner, oil is disadvantageous in terms of improving air permeability. When the amount of oil is used above a certain level, the physical properties are reduced and blooming causes a sudden drop in physical properties, thereby degrading the air permeability, which is the main role of the inner liner rubber composition.
An object of the present invention is to provide a tire inner liner rubber composition excellent in air permeability and physical properties.
Another object of the present invention is to provide a rubber made of the tire inner liner rubber composition having excellent air permeability and physical properties mentioned above.
Still another object of the present invention is to provide a tire including a rubber made of a tire inner liner rubber composition having excellent air permeability and physical properties mentioned above as an inner liner.
The present invention is a tire inner liner rubber composition in which the tire inner liner rubber composition includes 10 to 20 weight of liquid polybutene (liquid phase polybutene) with respect to 100 parts by weight of raw rubber, thereby improving air permeability and physical properties by liquid polybutene. A composition can be provided.
The present invention can be made of the rubber composition mentioned above to provide a rubber having excellent air permeability and physical properties, and can also provide a tire comprising such rubber having excellent air permeability and physical properties as an inner liner.
The tire inner liner rubber composition of the present invention can provide a tire inner liner rubber composition having improved air permeability and physical properties by liquid polybutene.
The present invention can provide a tire comprising the rubber composition mentioned above with excellent air permeability and physical properties, and a tire including such rubber with excellent air permeability and physical properties as an inner liner.
The present invention represents a tire inner liner rubber composition.
The present invention relates to a tire inner liner rubber composition having improved air permeability and physical properties in a tire inner liner rubber composition.
The present invention relates to a tire inner liner rubber composition in which a tire inner liner rubber composition includes 10 to 20 parts by weight of liquid phase polybutene with respect to 100 parts by weight of raw rubber, thereby improving air permeability and physical properties.
As the inner liner rubber composition of the present invention, rubber having excellent air permeability can be used as the raw material rubber.
As the inner liner rubber composition of the present invention, halobutyl rubber having excellent air permeability can be used as the raw material rubber.
The inner liner rubber composition of the present invention can be used as a raw material rubber mixed rubber mixture of halobutyl rubber and natural rubber excellent in air resistance.
When 100 parts by weight of raw rubber is used in the inner liner rubber composition of the present invention, the raw rubber may be mixed rubber having 20 to 40 parts by weight of natural rubber and 60 to 80 parts by weight of halobutyl rubber.
The inner liner rubber composition of the present invention can be used as a raw material rubber mixed rubber mixture of halobutyl rubber and synthetic rubber excellent in air resistance.
When 100 parts by weight of raw rubber is used in the inner liner rubber composition of the present invention, the raw rubber may be mixed rubber having 20 to 40 parts by weight of synthetic rubber and 60 to 80 parts by weight of halobutyl rubber.
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-c o-paramethyl styrene) may be used any one or more selected from the group.
The inner liner rubber composition of the present invention may include liquid polybutene to improve air permeability, and such liquid polybutene may be prepared by a C4 olefin polymerization process or prepared by a conventionally known method. It is a material widely known as a lubricant or fuel additive, and has a characteristic of not passing moisture and gas with a wide range of viscosities.
In the present invention, when the liquid polybutene is added to the tire inner liner rubber composition, mechanical strength, such as tensile strength or modulus, may be improved in addition to a barrier to inhibit moisture or air permeability.
The inner liner rubber composition of the present invention is less than 10 parts by weight of liquid polybutene (polybutene) relative to 100 parts by weight of the raw material rubber compounding properties of the rubber composition is poor, poor dispersion, poor physical properties and rather low air permeability In addition, when used in excess of 20 parts by weight, the physical properties are not maintained, but air permeability may decrease. Therefore, the inner liner rubber composition of the present invention preferably contains 10 to 20 parts by weight of liquid polybutene (polybutene) based on 100 parts by weight of the raw material rubber.
In the above, the liquid polybutene may have a weight average molecular weight of 1,200 to 1,400.
In the above, the liquid polybutene may be used having a viscosity of 20,000 to 25,000 cP at 40 ℃.
In the above, the liquid polybutene may be used having a viscosity of 550 to 750 cP at 100 ° C.
The liquid polybutene may have a weight average molecular weight of 1,200 to 1,400, at 40 ° C., having a viscosity of 20,000 to 25,000 cP, and a viscosity at 100 ° C. of 550 to 750 cP.
The inner liner rubber composition of the present invention may further include a dispersing aid so that additives used in the inner liner rubber composition may be well dispersed, thereby improving physical properties of the rubber composition.
Dispersion aids further included in the inner liner rubber composition of the present invention does not mean to use less than 3 parts by weight based on 100 parts by weight of the raw rubber, it is used in excess of 10 parts by weight to increase the content of the dispersion aid There is no rise in effect, rather there is a fear that the physical properties are reduced. Therefore, the dispersing aid in the inner liner rubber composition of the present invention preferably contains 3 to 10 parts by weight based on 100 parts by weight of the rubber material.
The dispersing aid is a hydrocarbon, zinc 솝 and filler (filler) is any one or more selected from the group of glass fiber (silicone), silica, wood powder, chalk (1-8: 1-8: 1-8) Mixtures may be used in a weight ratio of.
Among the components of the dispersion aid, the hydrocarbon may be a chain hydrocarbon having 1 to 10 carbon atoms and / or a cyclic hydrocarbon having 6 × n (n is 1 to 10) carbon atoms composed of a single bond.
The inner liner rubber composition of the present invention may use a reinforcing filler as one of additives to improve physical properties.
The inner liner rubber composition of the present invention may use 30 to 80 parts by weight of the reinforcing filler as an additive to improve the physical properties of 100 parts by weight of the raw material rubber.
In the inner liner rubber composition of the present invention, when the reinforcing filler is used in an amount of less than 30 parts by weight based on 100 parts by weight of the raw material rubber, the role of the reinforcing filler is insignificant. It may decrease. Therefore, the reinforcing filler in the inner liner rubber composition of the present invention preferably contains 30 to 80 parts by weight based on 100 parts by weight of the rubber material.
The reinforcing fillers are carbon black, silica, calcium carbonate, titanium dioxide, clay, layered silicate, tungsten, and talc (tungsten). Talc), syndiotactic-1,2-polybutadiene (syndiotactic-1,2-polybutadiene, SPB), plate graphite may further include any one or more selected from the group.
In the above carbon iodine adsorption 135-145g / kg, DBP adsorption 125-135ml / 100g, the coloration 125-130% can be used.
In the carbon black, iodine adsorption is 140g / kg, DBP adsorption is 130ml / 100g, can be used that the coloration of 127%.
In the above, the silica may use a BET surface area of 110 ~ 130㎡ / g.
In the silica, the surface of the silica treated with silanetriol (silanetriol) can be used.
As described above, the silica treated with the silane triol may be one in which a silane triol is treated with 5 to 50% of the silica weight on the surface of silica having a BET surface area of 110 to 130 m 2 / g.
In the above, the layered silicate may be used having an interlayer spacing of 0.1 to 10 nm.
In the above-described layered silicate, an aspect ratio (l / d) representing a ratio of the plane width l to the thickness d may be 5 or more.
In the above, the layered silicate may have a flattening ratio of 5 to 100.
The layered silicate may be a natural layered silicate capable of cation exchange reaction and / or anion exchange reaction.
The layered silicate may be a synthetic layered silicate capable of cation exchange and / or anion exchange reaction.
The layered silicate may be an organic layered silicate organically treated with a material having a cationic group and / or a material having an anionic group.
The layered silicates are montmorillonite, saponite, hectorite, hectorite, rectorite, vermiculite, mica, illite, kaolinite, and kaolinite. Any one selected from the group of sodium montmorillonite (Na-MMT) and claisite 15A can be used.
Among the fillers described above, 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 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 above fillers, plate graphite may have a particle size of 0.1 to 20 µm.
In the above-mentioned fillers, plate graphite may be one having an interlayer spacing of 0.1 to 10 nm.
Among the above fillers, plate graphite may be one having an aspect ratio (l / d) of 5 or more, which represents the ratio of the plane width l to the thickness d.
In the above fillers, plate graphite may have a flattening ratio of 5 to 100.
Among the above 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 fillers, the plate graphite may be one obtained from the following steps (a) and (b).
(A) immersing the graphite in a mixed solution of sulfuric acid and nitric acid in a weight ratio of 1: 9-9:
(B) washing and washing the dried graphite at 700-900 ° C. for 1-5 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, and the -SO 4 2 - ion of sulfuric acid or -NO 3 - ion of nitric acid is formed between the plate graphite layers. Make sure this is fully inserted.
The present invention includes a rubber composed of the above-mentioned tire inner liner rubber composition.
The present invention includes a tire containing a rubber made of the above-mentioned tire inner liner rubber composition.
The present invention includes a tire containing a rubber made of the above-mentioned tire inner liner rubber composition as an inner liner.
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.
In the tire inner liner rubber composition of the present invention, the tire inner liner rubber composition is applied under various conditions such as various components and contents. In order to achieve the object of the present invention, a tire inner liner rubber composition is provided. It was found to be preferable.
The tire inner liner rubber composition of the present invention may contain various additives such as activators, anti-aging agents, vulcanizing agents, and vulcanization accelerators used in conventional tire inner liner rubber compositions, in addition to the above-mentioned raw rubber, liquid polybutene, dispersion aid, and reinforcing filler. If necessary, it can be used in a predetermined amount by appropriate selection. However, these are general components used in the tire inner liner rubber composition, and thus are not essential components of the present invention.
Hereinafter, the content of the present invention will be described by the following examples, comparative 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 >
10 parts by weight of liquid polybutene, 60 parts by weight of carbon black (N-550), calcium carbonate 10 based on 100 parts by weight of raw material rubber consisting of 40 parts by weight of natural rubber and 60 parts by weight of halobutyl rubber (BB-2030 bromo butyl rubber) By weight, 3 parts by weight of stearic acid and 3 parts by weight of zinc oxide (ZnO) were added to a Banbury mixer and blended to obtain a rubber compound.
Rubber was prepared by adding 0.5 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 to the rubber compound and vulcanizing at 160 ° C. for 25 minutes.
Table 1 below summarizes the rubber composition.
<Example 2>
A rubber was manufactured in the same manner as in Example 1, except that 20 parts by weight of liquid polybutene was used.
<Comparative Example>
60 parts by weight of carbon black (N-550), 3 parts by weight of stearic acid, paraffin based on 100 parts by weight of the raw material rubber consisting of 40 parts by weight of natural rubber and 60 parts by weight of halobutyl rubber (BB-2030 bromo butyl rubber) 10 parts by weight of oil (parafine oil) and 3 parts by weight of zinc oxide (ZnO) were added to a Banbury mixer and blended to obtain a rubber compound.
Rubber was prepared by adding 0.5 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 to the rubber compound and vulcanizing at 160 ° C. for 25 minutes.
Table 1 below summarizes the rubber composition.
1) Halobutyl: BB-2030 Bromo Butyl Rubber
2) Liquid polybutene: Viscosity at weight average molecular weight 1,300 ± 10, 40 ℃ is 22,500 ± 10cP, viscosity at 100 ℃ is 650 ± 10cP
<Test Example>
For rubbers prepared in Examples 1, 2 and Comparative Examples, physical properties such as viscosity, rheometer, tensile property, air permeability, etc. were measured according to ASTM standards, and the results are shown in Table 2 below.
(125 ℃)
(145 ℃)
As shown in Table 2, the rubber prepared by using liquid polybutene without using paraffin oil as a process oil as in Examples 1 and 2 is paraffin oil as a process oil without using liquid polybutene ( Compared with the rubber produced in the comparative example using parafine oil), the modulus and tensile strength were increased, resulting in improved processability and significantly improved air permeability, the most important characteristic of the inner liner.
<Example 3>
15 parts by weight of liquid polybutene, 6.5 parts by weight of dispersing aid, 50 parts by weight of silica, talc (Talc) based on 100 parts by weight of raw material rubber consisting of 40 parts by weight of natural rubber and 60 parts by weight of halobutyl rubber (BB-2030 bromo butyl rubber) 10 parts by weight of stearic acid, 3 parts by weight of stearic acid, and 3 parts by weight of zinc oxide (ZnO) were added to a Banbury mixer and blended to obtain a rubber compound.
Rubber was prepared by adding 0.5 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 to the rubber compound and vulcanizing at 160 ° C. for 25 minutes.
In the dispersing aid, a mixture of five carbon atoms and a single hydrocarbon-based hydrocarbon, zinc 솝 and a filler (filler) in a weight ratio of 1: 1: 1 was used.
In the above, the silica had a BET surface area of 120 ± 5 m 2 / g.
<Example 4>
15 parts by weight of liquid polybutene, 6.5 parts by weight of dispersing aid, and a surface treated with silane triol based on 100 parts by weight of raw material rubber consisting of 40 parts by weight of natural rubber and 60 parts by weight of halobutyl rubber (BB-2030 bromo butyl rubber) 55 parts by weight of silica, 5 parts by weight of syndiotactic-1,2-polybutadiene (SPB), 3 parts by weight of stearic acid, and 3 parts by weight of zinc oxide (ZnO) were added to a Banbury mixer to obtain a rubber compound.
Rubber was prepared by adding 0.5 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 to the rubber compound and vulcanizing at 160 ° C. for 25 minutes.
The dispersing aid is a mixture of cyclic hydrocarbon having 12 carbon atoms and wood flour, which is 70 ± 2 mesh wood particles, as a filler and zinc (filler) in a weight ratio of 1: 1: 1. Was used.
As described above, the silica treated with the silane triol used a silane triol treated with 35% by weight of silica on the surface of silica having a BET surface area of 120 ± 5 m 2 / g.
In the above syndiotactic-1,2-polybutadiene (SPB) was used 5 ± 0.5㎛ diameter, specific surface area 110 ± 2m 2 / g.
As described above, the present invention has been described with reference to preferred embodiments, comparative examples, and test examples, but those skilled in the art should be aware of the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be understood that various modifications and variations can be made to the invention.
The tire inner liner rubber composition of the present invention improves the air permeability by liquid polybutene, improves the dispersibility of the reinforcing filler by the dispersing aid, and can provide a tire inner liner rubber composition with improved physical properties. The rubber composition made of the above rubber composition can be provided with a rubber having excellent air permeability and physical properties, and a tire including such a rubber having excellent air permeability and physical properties as an inner liner.
Claims (3)
10 to 20 parts by weight of liquid phase polybutene with respect to 100 parts by weight of raw rubber; Silica whose BET surface area is 5 to 50% of the weight of silane triol on the surface of silica with a surface area of 110 to 130 m² / g is silica treated with silane triol, 0.01 to 0.1 µm in diameter and 80 to 90 m 2 / g syndiotactic-1,2-polybutadiene (SPB), any one selected from syndiotactic-1,2-polybutadiene (SPB) having a diameter of 1 ~ 10㎛ and a specific surface area of 100 ~ 120m 2 / g 30 to 80 parts by weight of the above reinforcing fillers; Hydrocarbon, zinc 솝 and fillers in which at least one selected from the group of glass fiber, silica, wood powder and chalk are mixed in a weight ratio of 1 to 8: 1 to 8: 1 to 8 A tire inner liner rubber composition comprising 3 to 10 parts by weight of a dispersion aid of the mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20100099877A KR101196308B1 (en) | 2010-10-13 | 2010-10-13 | Tire inner liner rubber composition comprising liquid phase polybutene for improving anti-air permeability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20100099877A KR101196308B1 (en) | 2010-10-13 | 2010-10-13 | Tire inner liner rubber composition comprising liquid phase polybutene for improving anti-air permeability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20120038235A KR20120038235A (en) | 2012-04-23 |
| KR101196308B1 true KR101196308B1 (en) | 2012-11-06 |
Family
ID=46139083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR20100099877A KR101196308B1 (en) | 2010-10-13 | 2010-10-13 | Tire inner liner rubber composition comprising liquid phase polybutene for improving anti-air permeability |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101196308B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101430052B1 (en) * | 2013-04-26 | 2014-08-14 | 금호타이어 주식회사 | Color Sealant Composition having Self-sealing for Tire |
| CN105131355A (en) * | 2015-09-02 | 2015-12-09 | 苏州国泰科技发展有限公司 | High damping suspension system rubber material and preparation method thereof |
| KR102374187B1 (en) * | 2019-12-24 | 2022-03-14 | 한화토탈 주식회사 | Method of producing rubber composition, rubber composition made by the same, and tire made by employing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005036043A (en) | 2003-07-16 | 2005-02-10 | Yokohama Rubber Co Ltd:The | Rubber composition and inner liner using it and used for tire |
| JP2008255168A (en) | 2007-04-02 | 2008-10-23 | Sumitomo Rubber Ind Ltd | Rubber composition for tire tread and pneumatic tire having tread produced by using the same |
-
2010
- 2010-10-13 KR KR20100099877A patent/KR101196308B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005036043A (en) | 2003-07-16 | 2005-02-10 | Yokohama Rubber Co Ltd:The | Rubber composition and inner liner using it and used for tire |
| JP2008255168A (en) | 2007-04-02 | 2008-10-23 | Sumitomo Rubber Ind Ltd | Rubber composition for tire tread and pneumatic tire having tread produced by using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120038235A (en) | 2012-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100964308B1 (en) | Tire rubber composition | |
| KR100837863B1 (en) | Rubber composition for tire | |
| KR100964311B1 (en) | Tire rubber composition improved wet traction property | |
| KR101196308B1 (en) | Tire inner liner rubber composition comprising liquid phase polybutene for improving anti-air permeability | |
| KR101016367B1 (en) | Tire rubber composition with improved antidegradant property | |
| KR101122193B1 (en) | Rubber composition for tire | |
| KR100964310B1 (en) | Tire rubber composition improved wet traction property | |
| KR100990125B1 (en) | Tire rubber composition comprising silica/carbon complex | |
| KR100718168B1 (en) | Rubber composition for tire including nano-filler and coupling agent | |
| KR20090111200A (en) | Tire tread rubber composition | |
| KR100856870B1 (en) | Tire tread rubber composition | |
| KR20090106287A (en) | Insert rubber composition to reinforce the sidewall of run-flat tire | |
| KR20170050343A (en) | Rubber composition for rim cushion of low-fuel tire | |
| KR100870731B1 (en) | Tire tread rubber composition | |
| KR100726866B1 (en) | Tire tread rubber composition for truck and bus | |
| KR101186169B1 (en) | Tire tread rubber composition | |
| KR101023757B1 (en) | Tire rubber composition with improved antidegradant property | |
| KR100913596B1 (en) | Tire apex rubber composition | |
| KR100922888B1 (en) | Tire tread rubber composition | |
| KR20100002754A (en) | Enhance scorch resistance of carcass rubber composition | |
| KR20090033559A (en) | Mastication method of natural rubber and tire tread rubber composition comprising aboved masticated natural rubber | |
| KR101077582B1 (en) | Tire tread rubber composition comprising silica aerogel | |
| KR100829176B1 (en) | Rubber compound for tire reduced rolling resistance | |
| KR100803318B1 (en) | Rubber composition for tire comprising chain type carbon black | |
| KR101023235B1 (en) | Tire tread rubber composition for aircraft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| LAPS | Lapse due to unpaid annual fee |