JPH0248575B2 - - Google Patents
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- Publication number
- JPH0248575B2 JPH0248575B2 JP55185072A JP18507280A JPH0248575B2 JP H0248575 B2 JPH0248575 B2 JP H0248575B2 JP 55185072 A JP55185072 A JP 55185072A JP 18507280 A JP18507280 A JP 18507280A JP H0248575 B2 JPH0248575 B2 JP H0248575B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- weight
- parts
- rubber composition
- liquid
- 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.)
- Expired - Lifetime
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- Compositions Of Macromolecular Compounds (AREA)
Description
本発明はゴム組成物に関し、詳しくは固形ゴム
フエノール樹脂および特定の官能基を有する液状
ゴムからなる硬度、伸び、引張強度ならびに引裂
強度のすぐれたゴム組成物に関するものである。
これまでに、スチレン−ブタジエンゴム
（SBR）等の固形ゴムを改質するためにフエノー
ル樹脂等の熱硬化性樹脂を配合することが知られ
ている。
しかしながら、このようにして得られるゴム組
成物は硬度はほぼ満足されるもののより大きい硬
度を得ようとすると、引張強度、引裂強度ととも
に伸びにおいて性質の劣るものとなる欠点があつ
た。
本発明の目的は、このような欠点を解消したゴ
ム組成物を提供することである。
すなわち、本発明によれば固形ゴム、フエノー
ル樹脂および分子中にエポキシ基および／または
イソシアネート基を有する液状ゴムからなるゴム
組成物が提供される。
本発明に用いる固形ゴムとしてはスチレン−ブ
タジエンゴム（SBR）、アクリロニトリルブタジ
エンゴム（NBR）、天然ゴム（NR）、クロロプ
レンゴム（CR）、イソブチレン・イソプレンゴム
（IIR）などがある。
次に、本発明に用いる液状ゴムは、前記の如
く、分子中にエポキシ基およびイソシアネート基
を有するものであり、平均分子量500〜8000のポ
リブタジエン、ポリイソプレン、ポリクロロプレ
ン、ブタジエン／イソプレン共重合体、アクリロ
ニトリル／ブタジエン共重合体、スチレン／ブタ
ジエン共重合体のような、いわゆるテレキーリツ
ク液状ゴムがある。
本発明のゴム組成物における各成分の配合割合
については、固形ゴム100重量部あたりフエノー
ル樹脂１〜100重量部、好ましくは２〜50重量部
および液状ゴム１〜100重量部、好ましくは５〜
50重量部とすべきである。
なお、本発明のゴム組成物には必要に応じて補
助的成分を適宜に添加することができ、たとえば
いおう、酸化亜鉛、酸化マグネシウムなどの加硫
剤、水酸化カルシウム、グアニジン類、アルデヒ
ドアミン類、チウラム類、カルバミン酸塩類、チ
アゾール類などの加硫促進剤、ステアリン酸、ナ
フテン酸などの分散剤、プロセスオイル、パイン
タールなどの軟化剤、ヘキサメチレンテトラミン
などの硬化触媒、カーボンブラツクなどの補強
剤、さらには着色剤、老化防止剤などを挙げるこ
とができる。
さらに、液状ゴムに対する添加剤として次のよ
うなものを用いることもできる。すなわち、トリ
クロロモノフルオロメタンなどの発泡剤、塩化第
一スズ、トリエチルアミンなどの硬化触媒、ポリ
オール、ポリアミン、ポリカルボン酸などの強化
剤、ジイソシアネート化合物などの硬化剤、顔
料、充てん材などの無機材、紫外線吸収剤、酸化
防止剤、オゾン劣化防止剤などの老化防止剤、伸
展油などの作業性改善剤などを適宜加えることが
できる。
次に、本発明のゴム組成物の製造方法について
は、まず固形ゴム当該液状ゴム、フエノール樹
脂、さらに必要に応じて硬化触媒を加え、次いで
この配合物を必要に応じて用いる補助的成分とと
もに混練りする。混練は、たとえば２本ロールな
どを用いて55±５℃の温度で10〜60分間行なう。
このようにして得られた混練物を120〜180℃の
温度、好ましくは135〜160℃の温度および35Kg／
cm2以上の圧力、好ましくは60〜120Kg／cm2の圧力
で加熱、加圧することによつてゴム組成物を得
る。
本発明のゴム組成物は非常に大きな硬度を有し
ており、伸びも良好である。しかも、この組成物
は引張強度や引裂強度もすぐれている。したがつ
て、本発明のゴム組成物はタイヤ等に有用なもの
である。
実施例および比較例
固形ゴムにフエノール樹脂、液状ゴムおよび硬
化用触媒（トリエチレンジアミン）や他の補助的
成分をそれぞれ所定量（重量部）づつ配合して配
合物を得、次いでこれを加熱、加圧してゴム組成
物を得た。ゴム組成物の性質を実験条件とともに
第１表に示す。
The present invention relates to a rubber composition, and more particularly to a rubber composition comprising a solid rubber phenolic resin and a liquid rubber having a specific functional group and having excellent hardness, elongation, tensile strength, and tear strength. Hitherto, it has been known to blend thermosetting resins such as phenolic resins in order to modify solid rubbers such as styrene-butadiene rubber (SBR). However, the rubber composition obtained in this manner has a drawback that although the hardness is almost satisfactory, when trying to obtain a higher hardness, the properties are inferior in tensile strength, tear strength, and elongation. An object of the present invention is to provide a rubber composition that eliminates these drawbacks. That is, according to the present invention, there is provided a rubber composition comprising a solid rubber, a phenolic resin, and a liquid rubber having an epoxy group and/or an isocyanate group in the molecule. Examples of the solid rubber used in the present invention include styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), natural rubber (NR), chloroprene rubber (CR), and isobutylene-isoprene rubber (IIR). Next, as mentioned above, the liquid rubber used in the present invention has an epoxy group and an isocyanate group in the molecule, and has an average molecular weight of 500 to 8000, such as polybutadiene, polyisoprene, polychloroprene, butadiene/isoprene copolymer, There are so-called telechelic liquid rubbers such as acrylonitrile/butadiene copolymers and styrene/butadiene copolymers. The mixing ratio of each component in the rubber composition of the present invention is 1 to 100 parts by weight of phenol resin, preferably 2 to 50 parts by weight, and 1 to 100 parts by weight of liquid rubber, preferably 5 to 5 parts by weight, per 100 parts by weight of solid rubber.
Should be 50 parts by weight. Incidentally, auxiliary components can be appropriately added to the rubber composition of the present invention as necessary, such as vulcanizing agents such as sulfur, zinc oxide, and magnesium oxide, calcium hydroxide, guanidines, and aldehyde amines. , vulcanization accelerators such as thiurams, carbamates, and thiazoles, dispersants such as stearic acid and naphthenic acid, process oils, softeners such as pine tar, curing catalysts such as hexamethylenetetramine, and reinforcements such as carbon black. Further, coloring agents, anti-aging agents, etc. can be mentioned. Furthermore, the following can also be used as additives for liquid rubber. That is, blowing agents such as trichloromonofluoromethane, curing catalysts such as stannous chloride and triethylamine, reinforcing agents such as polyols, polyamines, and polycarboxylic acids, curing agents such as diisocyanate compounds, inorganic materials such as pigments and fillers, Anti-aging agents such as ultraviolet absorbers, antioxidants and ozone deterioration inhibitors, workability improving agents such as extender oil, etc. can be added as appropriate. Next, regarding the method for producing the rubber composition of the present invention, first, a solid rubber, the liquid rubber, a phenolic resin, and a curing catalyst are added as necessary, and then this mixture is mixed with auxiliary components used as necessary. Knead. Kneading is carried out for 10 to 60 minutes at a temperature of 55±5° C. using, for example, two rolls. The kneaded material thus obtained is heated at a temperature of 120 to 180°C, preferably 135 to 160°C, and
A rubber composition is obtained by heating and pressurizing at a pressure of cm 2 or higher, preferably 60 to 120 kg/cm 2 . The rubber composition of the present invention has very high hardness and good elongation. Furthermore, this composition has excellent tensile strength and tear strength. Therefore, the rubber composition of the present invention is useful for tires and the like. Examples and Comparative Examples Predetermined amounts (parts by weight) of phenolic resin, liquid rubber, curing catalyst (triethylenediamine), and other auxiliary components are blended into solid rubber to obtain a blend, which is then heated and processed. A rubber composition was obtained by pressing. The properties of the rubber composition are shown in Table 1 along with the experimental conditions.
【表】【table】
Claims (1)
ポキシ基および／またはイソシアネート基を有す
る液状ゴムからなるゴム組成物。 ２ 固形ゴム100重量部あたりフエノール樹脂１
〜100重量部および液状ゴム１〜100重量部の割合
で配合してなる特許請求の範囲第１項記載のゴム
組成物。 ３ 固形ゴムがスチレン−ブタジエンゴム、アク
リロニトリルブタジエンゴムおよびクロロプレン
ゴムのいずれかである特許請求の範囲第１項記載
のゴム組成物。[Scope of Claims] 1. A rubber composition comprising a solid rubber, a phenolic resin, and a liquid rubber having an epoxy group and/or an isocyanate group in the molecule. 2 1 phenolic resin per 100 parts by weight of solid rubber
The rubber composition according to claim 1, which is blended in a proportion of 1 to 100 parts by weight of liquid rubber and 1 to 100 parts by weight of liquid rubber. 3. The rubber composition according to claim 1, wherein the solid rubber is any one of styrene-butadiene rubber, acrylonitrile butadiene rubber, and chloroprene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18507280A JPS57109841A (en) | 1980-12-27 | 1980-12-27 | Rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18507280A JPS57109841A (en) | 1980-12-27 | 1980-12-27 | Rubber composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57109841A JPS57109841A (en) | 1982-07-08 |
| JPH0248575B2 true JPH0248575B2 (en) | 1990-10-25 |
Family
ID=16164314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18507280A Granted JPS57109841A (en) | 1980-12-27 | 1980-12-27 | Rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57109841A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999041302A1 (en) * | 1998-02-17 | 1999-08-19 | World Properties, Inc. | Rubber shock absorbing component and method of manufacture thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5617380B2 (en) * | 1972-07-11 | 1981-04-22 | ||
| JPS5152449A (en) * | 1974-10-31 | 1976-05-10 | Idemitsu Kosan Co | SEIKEIYOGO MUSOSEIBUTSU |
| JPS54139954A (en) * | 1978-04-22 | 1979-10-30 | Sumitomo Rubber Ind | Rubber composition |
| JPS5618633A (en) * | 1979-07-24 | 1981-02-21 | Bridgestone Corp | Rubber composition for bead filler |
-
1980
- 1980-12-27 JP JP18507280A patent/JPS57109841A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57109841A (en) | 1982-07-08 |
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