JPS62236840A - Rubber composition for tire tread - Google Patents
Rubber composition for tire treadInfo
- Publication number
- JPS62236840A JPS62236840A JP61079153A JP7915386A JPS62236840A JP S62236840 A JPS62236840 A JP S62236840A JP 61079153 A JP61079153 A JP 61079153A JP 7915386 A JP7915386 A JP 7915386A JP S62236840 A JPS62236840 A JP S62236840A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- skid performance
- acid ester
- fatty acid
- propylene glycol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 45
- 239000005060 rubber Substances 0.000 title claims abstract description 45
- 239000000203 mixture Substances 0.000 title claims description 17
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims abstract description 29
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 17
- 239000000194 fatty acid Substances 0.000 claims abstract description 17
- 229930195729 fatty acid Natural products 0.000 claims abstract description 17
- -1 fatty acid ester Chemical class 0.000 claims abstract description 12
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 10
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 10
- 229920001194 natural rubber Polymers 0.000 claims abstract description 10
- 229920003244 diene elastomer Polymers 0.000 claims abstract description 6
- 229920001195 polyisoprene Polymers 0.000 claims abstract description 5
- 239000003208 petroleum Substances 0.000 abstract description 6
- 239000010734 process oil Substances 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000006235 reinforcing carbon black Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 150000004665 fatty acids Chemical class 0.000 description 5
- 239000005062 Polybutadiene Substances 0.000 description 4
- ZDWGXBPVPXVXMQ-UHFFFAOYSA-N bis(2-ethylhexyl) nonanedioate Chemical compound CCCCC(CC)COC(=O)CCCCCCCC(=O)OCC(CC)CCCC ZDWGXBPVPXVXMQ-UHFFFAOYSA-N 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000010692 aromatic oil Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003925 fat Substances 0.000 description 2
- 235000019197 fats Nutrition 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 1
- VHOQXEIFYTTXJU-UHFFFAOYSA-N Isobutylene-isoprene copolymer Chemical group CC(C)=C.CC(=C)C=C VHOQXEIFYTTXJU-UHFFFAOYSA-N 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、ウェットスキツド性能を低下させることなし
にアイススキツド性能を大幅に向上させ得るタイヤトレ
ッド用ゴム組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rubber composition for a tire tread that can significantly improve ice skid performance without reducing wet skid performance.
この組成物は、冬期用タイヤおよびオールシーズンラジ
アルタイヤ用キャップトレッドゴム組成物として特に有
用である。This composition is particularly useful as a cap tread rubber composition for winter tires and all-season radial tires.
タイヤのゴム材料の摩擦特性を決める主要因は原料ゴム
成分であり、乾燥路面や湿潤路面のような一般的な路面
状態では、スチレン−ブタジェン共重合体ゴム（ＳＢＲ
）のようなガラス転移温度（Ｔｇ）が比較的高い原料ゴ
ムを用いると摩擦抵抗が大きくなる。しかしながら、こ
のヨウにＴｇが高いゴムは一方でエネルギーロスが大き
く発熱し易く、低燃費タイヤへの適用が難しく、また、
低、温時にゴムの硬化が著しいためアイススキツド性能
が大幅に低下し、冬期用タイヤおよびオールシーズンタ
イヤへの適用は望ましくない。The main factor that determines the friction characteristics of tire rubber materials is the raw rubber component.
) If a raw material rubber with a relatively high glass transition temperature (Tg) is used, the frictional resistance will increase. However, rubber with a very high Tg has a large energy loss and tends to generate heat, making it difficult to apply to low fuel consumption tires.
Since the rubber hardens significantly at low temperatures, the ice skid performance is significantly reduced, making it undesirable to apply to winter tires and all-season tires.
また、氷結路面においては、天然ゴム（ＮＲ）やポリブ
タジェンゴム（Ｂ Ｒ）のようなＴｇの低い原料ゴムを
用いると摩擦抵抗が大きくなる。Furthermore, on icy road surfaces, the use of raw material rubber with a low Tg, such as natural rubber (NR) or polybutadiene rubber (BR), increases frictional resistance.
しかしながら、このようなゴムを用いるとウェットスキ
ツド性能が著しく低下し、好ましくない。このように、
ウェットスキツド性能とアイススキツド性能は、一般的
に二律背反するものと考えられ、ウェットスキツド性能
を著しく低下させることなしにアイススキツド性能を大
幅に高めることは困難であった。However, when such rubber is used, the wet skid performance deteriorates significantly, which is not preferable. in this way,
Wet skid performance and ice skid performance are generally considered to be contradictory, and it has been difficult to significantly improve ice skid performance without significantly reducing wet skid performance.
従来、低温時でのゴムの硬化を防ぐためムこ、上記のよ
うにＴｇの低い原料ゴムを使用することの他、アロマ系
オイル、ナフテン系オイルを多量に使用したり、セパシ
ン酸ジオクチルエステル（ＤＯ３）やアゼライン酸ジオ
クチルエステル（ＤＯＺ）のような低温用可塑剤を加え
ることが知られている。しかしながら、アロマ系オイル
やナフテン系オイルのような石油系軟化剤を多量に使用
すると耐摩耗性、転がり抵抗性が低下するため好ましく
ない。また、ＤＯ３やＤＯＺなどの低温用可塑剤はタイ
ヤ表面から揮散したりするため、アイススキツド性能を
長期にわたって維持することは困難である。Conventionally, in order to prevent rubber from hardening at low temperatures, in addition to using raw rubber with a low Tg as mentioned above, large amounts of aromatic oils and naphthenic oils were used, and dioctyl sepacic acid ester ( It is known to add low temperature plasticizers such as DO3) and azelaic acid dioctyl ester (DOZ). However, it is not preferable to use a large amount of petroleum-based softeners such as aromatic oils or naphthenic oils because the abrasion resistance and rolling resistance decrease. Furthermore, since low-temperature plasticizers such as DO3 and DOZ volatilize from the tire surface, it is difficult to maintain ice skid performance over a long period of time.
本発明は、ウェットスキツド性能を低下させることなく
、アイススキツド性能を著しく向上させ得るタイヤトレ
ッド用ゴム組成物を提供することを目的とする。An object of the present invention is to provide a rubber composition for a tire tread that can significantly improve ice skid performance without reducing wet skid performance.
このため、本発明は、天然ゴム、ポリイソプレンゴムお
よびジエン系ゴムからなる群から選ばれた１種以上のゴ
ムに対して、プロピレングリコールの脂肪酸エステルを
配合してなることを特徴とするタイヤトレッド用ゴム組
成物を要旨とするものである。Therefore, the present invention provides a tire tread characterized in that a fatty acid ester of propylene glycol is blended with one or more rubbers selected from the group consisting of natural rubber, polyisoprene rubber, and diene rubber. The gist of this paper is rubber compositions for use in rubber compositions.
以下、本発明の構成について詳しく説明する。Hereinafter, the configuration of the present invention will be explained in detail.
本発明において用いるゴムは、天然ゴム（ＮＲ）、ポリ
イソプレンゴム（ＩＲ）およびジエン系ゴムからなる群
から選ばれた１種以上のものである。ジエン系ゴムは、
例えば、スチレン−ブタジェン共重合体ゴム（ＳＢＲ）
、ポリブタジェンゴム（ＢＲ）、イソプレン−イソブ
チレンゴム（ＩＩＲ）等である。これらのゴムの変性物
、これらのゴムのブレンド物等がいずれも使用できる。The rubber used in the present invention is one or more selected from the group consisting of natural rubber (NR), polyisoprene rubber (IR), and diene rubber. Diene rubber is
For example, styrene-butadiene copolymer rubber (SBR)
, polybutadiene rubber (BR), isoprene-isobutylene rubber (IIR), and the like. Modified products of these rubbers, blends of these rubbers, etc. can all be used.
本発明においては、上記ゴムに対してプロピレングリコ
ールの脂肪酸エステルを配合する。In the present invention, a fatty acid ester of propylene glycol is blended with the above rubber.
この場合の配合割合は、特に限定されるものではないが
、ゴム１００重量部に対してプロピレングリコールの脂
肪酸エステル２〜５０重量部であればよい。The blending ratio in this case is not particularly limited, but may be 2 to 50 parts by weight of propylene glycol fatty acid ester based on 100 parts by weight of rubber.
上記プロピレングリコールの脂肪酸エステルの原料とし
て使用する脂肪酸は、例えば、カプリン酸、カプロン酸
などの合成脂肪酸、牛脂、肝脂などの動物油脂から得た
脂肪酸、ヤシ油、ナタネ油などの植物油脂から得た脂肪
酸であるが、最も望ましいのは植物油脂系脂肪酸である
。The fatty acids used as raw materials for the propylene glycol fatty acid ester include, for example, synthetic fatty acids such as capric acid and caproic acid, fatty acids obtained from animal fats such as beef tallow and liver fat, and vegetable fats and oils such as coconut oil and rapeseed oil. The most desirable fatty acids are vegetable oil-based fatty acids.
このプロピレングリコール脂肪酸エステルは、アイスス
キツド性能をよりいっそう向上させるために石油系軟化
剤と併用しても良い。石油系軟化剤は、例えば、パラフ
ィン系プロセス油、アロマ系プロセス油、ナフテン系プ
ロセス油すどである。This propylene glycol fatty acid ester may be used in combination with a petroleum softener to further improve ice skid performance. Petroleum-based softeners include, for example, paraffinic process oils, aromatic process oils, and naphthenic process oils.
このようにしてなる本発明のゴム組成物には、ゴム１０
０重量部に対して補強性カーボンブランクを３０〜１０
０重量部配合す置部が好ましい。カーボンブランクが３
０重量部未満では耐摩耗性が著しく低下し、一方、１０
０重量部を越えると転がり抵抗性が低下し、好ましくな
い。The rubber composition of the present invention prepared in this way contains rubber 10
30 to 10 parts of reinforcing carbon blank to 0 parts by weight
A portion containing 0 parts by weight is preferred. 3 carbon blanks
If it is less than 0 parts by weight, the wear resistance will be significantly reduced;
If it exceeds 0 parts by weight, rolling resistance will decrease, which is not preferable.
さらに、浦常のゴム組成物に配合される硫黄等の加硫剤
、加硫促進剤、加硫促進助剤、老化防止剤、ワックス等
を適宜配合してもよい。Furthermore, vulcanizing agents such as sulfur, vulcanization accelerators, vulcanization accelerators, anti-aging agents, waxes, etc., which are blended into Uratsune's rubber compositions, may be blended as appropriate.
以下に実施例および比較例を挙げて本発明の効果を具体
的に説明する。EXAMPLES The effects of the present invention will be specifically explained below with reference to Examples and Comparative Examples.
実施例、比較例
下記第１表に示す配合内容（重量部）でゴム組成物を作
製した。Examples and Comparative Examples Rubber compositions were prepared with the formulations (parts by weight) shown in Table 1 below.
このゴム組成物の加硫物物性を同じく第１表に示す。The physical properties of the vulcanizate of this rubber composition are also shown in Table 1.
さらに、このゴム組成物をタイヤキャップトレッドゴム
として用い、タイヤサイズ１６５／８０ Ｒ１３でアイ
ススキツド性能、ウェットスキツド性能を測定した結果
を第１表に示す。Furthermore, this rubber composition was used as a tire cap tread rubber, and the ice skid performance and wet skid performance were measured on a tire size of 165/80 R13. Table 1 shows the results.
（本頁以下余白）
第 １ 表
ａわ ＊ｌ プロピレングリコールヤシ油脂肪酸エステ
ル。(Margins below this page) Table 1 *l Propylene glycol coconut oil fatty acid ester.
ここで、引張物性は、各ゴム組成物を混練し、１６０℃
で１５分間加硫して得た加硫物について、ＪＩＳ Ｋ６
３０１ ｒ一般ゴム試験方法」に準拠して測定した。Here, the tensile properties are determined by kneading each rubber composition at 160°C.
Regarding the vulcanized product obtained by vulcanization for 15 minutes, JIS K6
301 r General Rubber Test Methods.
アイススキツド性能は、−１０〜−１５℃の雰囲気の氷
結路面で初速度３Ｑｋｍ／ｈからの制動距離を求め、比
較例１を１００とし、指数表示した。数値大なる程、良
好である。For the ice skid performance, the braking distance from an initial speed of 3 Q km/h was determined on an icy road surface in an atmosphere of -10 to -15°C, and Comparative Example 1 was set as 100, and expressed as an index. The larger the value, the better.
ウェットスキツド性能は、湿潤アスファルト路面には、
初速度４０．６０．８０ｋｍ／ｈからの制動距離を求め
、各速度で比較例１を１００とし、上記アイススキツド
性能と同様の方法で指数を求め、その３水準の平均値に
て指数表示した。従って、数値大なるほど良好である。For wet skid performance, on wet asphalt road surface,
The braking distance from the initial speed of 40.60.80 km/h was determined, Comparative Example 1 was set as 100 at each speed, the index was determined in the same manner as the ice skid performance described above, and the average value of the three levels was expressed as an index. Therefore, the higher the value, the better.
比較例１〜３は、従来から知られている方法である。ア
イススキツド性能を著しく向上させると言われている低
温用可塑剤セバシン酸ジオクチルエステルを用いた比較
例３の場合のアイススキツド性能も示している。この場
合には、アイススキツド性能は向上するが、ウェットス
キツド性能は大幅に低下する。実施例１．２は、プロピ
レングリコールの脂肪酸エステルを用いているが、この
場合には、天然ゴム／ＢＲ系、天然ゴム／ＩＲ／ＢＲ等
のいずれの場合も、引張物性は比較例１とほぼ同等であ
り、ウェットスキツド性能を低下させずに、アイススキ
ツド性能を大幅に改善することが可能となった。Comparative Examples 1 to 3 are conventionally known methods. Also shown is the ice skid performance in the case of Comparative Example 3 using the low temperature plasticizer dioctyl sebacate, which is said to significantly improve ice skid performance. In this case, ice skid performance is improved, but wet skid performance is significantly reduced. Example 1.2 uses propylene glycol fatty acid ester, but in this case, the tensile properties are almost the same as in Comparative Example 1 in both natural rubber/BR system, natural rubber/IR/BR, etc. It has become possible to significantly improve ice skid performance without reducing wet skid performance.
以上説明したように、タイヤトレッド用ゴム組成物にプ
ロピレングリコールの脂肪酸エステルを単独で、または
石油系軟化剤と組み合わせて使用することによって、ウ
ェットスキツド性能を低下させることなく、アイススキ
ツド性能を大幅に改善することが可能となった。このた
め、冬期用タイヤやオールシーズンラジアルタイヤのト
レッド用ゴムとして使用すれば、冬期に要求される性能
を著しく向上させることができる。As explained above, by using fatty acid ester of propylene glycol alone or in combination with a petroleum softener in a tire tread rubber composition, ice skid performance can be significantly improved without reducing wet skid performance. It became possible to improve. Therefore, if it is used as a tread rubber for winter tires or all-season radial tires, the performance required in winter can be significantly improved.
Claims (1)
なる群から選ばれた１種以上のゴムに対して、プロピレ
ングリコールの脂肪酸エステルを配合してなることを特
徴とするタイヤトレッド用ゴム組成物。A rubber composition for a tire tread, characterized in that a fatty acid ester of propylene glycol is blended with one or more rubbers selected from the group consisting of natural rubber, polyisoprene rubber, and diene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61079153A JPS62236840A (en) | 1986-04-08 | 1986-04-08 | Rubber composition for tire tread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61079153A JPS62236840A (en) | 1986-04-08 | 1986-04-08 | Rubber composition for tire tread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62236840A true JPS62236840A (en) | 1987-10-16 |
Family
ID=13682016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61079153A Pending JPS62236840A (en) | 1986-04-08 | 1986-04-08 | Rubber composition for tire tread |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62236840A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007509804A (en) * | 2003-10-30 | 2007-04-19 | ソシエテ ド テクノロジー ミシュラン | Tread with tread pattern elements covered with an unusual mixture |
-
1986
- 1986-04-08 JP JP61079153A patent/JPS62236840A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007509804A (en) * | 2003-10-30 | 2007-04-19 | ソシエテ ド テクノロジー ミシュラン | Tread with tread pattern elements covered with an unusual mixture |
| JP4685791B2 (en) * | 2003-10-30 | 2011-05-18 | ソシエテ ド テクノロジー ミシュラン | Tread with tread pattern elements covered with an unusual mixture |
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