JPS58152030A - Rubber composition - Google Patents
Rubber compositionInfo
- Publication number
- JPS58152030A JPS58152030A JP57033764A JP3376482A JPS58152030A JP S58152030 A JPS58152030 A JP S58152030A JP 57033764 A JP57033764 A JP 57033764A JP 3376482 A JP3376482 A JP 3376482A JP S58152030 A JPS58152030 A JP S58152030A
- Authority
- JP
- Japan
- Prior art keywords
- cresol resin
- oil
- rubber
- cashew
- modified
- 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.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 31
- 239000005060 rubber Substances 0.000 title claims abstract description 31
- 239000000203 mixture Substances 0.000 title claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 56
- 229920005989 resin Polymers 0.000 claims abstract description 56
- 150000001896 cresols Chemical class 0.000 claims abstract description 26
- 244000226021 Anacardium occidentale Species 0.000 claims abstract description 21
- 235000020226 cashew nut Nutrition 0.000 claims abstract description 21
- 238000012986 modification Methods 0.000 claims abstract description 19
- 230000004048 modification Effects 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 235000019492 Cashew oil Nutrition 0.000 claims abstract description 15
- 239000010467 cashew oil Substances 0.000 claims abstract description 15
- 229940059459 cashew oil Drugs 0.000 claims abstract description 15
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229930003836 cresol Natural products 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 235000017060 Arachis glabrata Nutrition 0.000 claims 1
- 244000105624 Arachis hypogaea Species 0.000 claims 1
- 235000010777 Arachis hypogaea Nutrition 0.000 claims 1
- 235000018262 Arachis monticola Nutrition 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- 235000020232 peanut Nutrition 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 12
- 235000019198 oils Nutrition 0.000 abstract description 11
- 238000004073 vulcanization Methods 0.000 abstract description 9
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 abstract description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 abstract description 7
- 239000011593 sulfur Substances 0.000 abstract description 7
- 150000001993 dienes Chemical class 0.000 abstract description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000004312 hexamethylene tetramine Substances 0.000 abstract description 4
- 235000010299 hexamethylene tetramine Nutrition 0.000 abstract description 4
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 3
- 239000006229 carbon black Substances 0.000 abstract description 3
- 229920003052 natural elastomer Polymers 0.000 abstract description 3
- 229920001194 natural rubber Polymers 0.000 abstract description 3
- 235000021355 Stearic acid Nutrition 0.000 abstract description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 abstract description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 abstract description 2
- 239000008117 stearic acid Substances 0.000 abstract description 2
- 239000011787 zinc oxide Substances 0.000 abstract description 2
- 229920001875 Ebonite Polymers 0.000 abstract 1
- 229920002857 polybutadiene Polymers 0.000 abstract 1
- 239000011369 resultant mixture Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 235000001466 Ribes nigrum Nutrition 0.000 description 3
- 241001312569 Ribes nigrum Species 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 210000001520 comb Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 240000007472 Leucaena leucocephala Species 0.000 description 1
- 235000010643 Leucaena leucocephala Nutrition 0.000 description 1
- 240000006240 Linum usitatissimum Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- -1 carpin black Chemical compound 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- 235000004426 flaxseed Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229940100630 metacresol Drugs 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は高硬度ゴム組成物に関し、詳しくはジエン系ゴ
ムに力°シューオイル変性率の高いカシューナツツシェ
ルオイル変性クレゾール樹脂とクレゾール樹脂硬化剤と
を配合した高硬度ゴム組成物に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high hardness rubber composition, and more specifically, a high hardness rubber composition in which a diene rubber is blended with a cashew nut shell oil modified cresol resin having a high choux oil modification rate and a cresol resin curing agent. Regarding the composition.
従来、コゝムに高硬度物性を付与する方法として、一般
的にはカーがンブラックやイオウの配合量を増量する方
法が行なわれている。しかし、カーボンブラックを増量
すると例えばロール巻き付性、ムーニー粘度の増加など
加工性が著しく悪化するばかシでなく、加硫後の物性、
特に破断伸びの低下が大きく使用上の問題があった。ま
た、イオウを増量すると、イオウ多量配合によるスコー
チタイムの短縮化によって加硫時の加工安全性に難点が
あった。Conventionally, a method of imparting high hardness to combs has generally been to increase the amount of carbon black or sulfur blended. However, increasing the amount of carbon black will not only significantly deteriorate processability, such as increase in roll wrapability and Mooney viscosity, but also improve physical properties after vulcanization.
In particular, the elongation at break was significantly reduced, which caused problems in use. Furthermore, when the amount of sulfur is increased, there is a problem in processing safety during vulcanization due to shortening of scorch time due to the addition of a large amount of sulfur.
そこで；最近注目されている方法として、特開昭５３−
４０５９号、特開昭５５−３１８２３号、特開昭５５−
５４３３７号に開示されているようにカシューナツツシ
ェルオイル変性フェノール樹脂などの反応性樹脂をゴム
に配合する方法が提案されている。Therefore, as a method that has recently attracted attention,
No. 4059, JP-A-55-31823, JP-A-55-
As disclosed in No. 54337, a method has been proposed in which a reactive resin such as a cashew nut shell oil modified phenolic resin is blended into rubber.
これはゴム組成物は未加硫時には樹脂の軟化点以上の温
度で混練等の作業が行なわれるため、反応性樹脂が軟化
剤としてゴムの加工性改善に寄与し、一方ゴム組成物の
加硫に際しては、反応性樹脂が架橋反応に関与してゴム
の硬度上昇、動的弾性率の向上をもたらすという見地に
基づくものである。This is because when a rubber composition is not vulcanized, operations such as kneading are performed at a temperature above the softening point of the resin, so the reactive resin acts as a softening agent and contributes to improving the processability of the rubber. This is based on the viewpoint that the reactive resin participates in the crosslinking reaction, thereby increasing the hardness of the rubber and improving the dynamic elastic modulus.
この反応性樹脂をゴムに配合する方法は、力−デンブラ
ックやイオウをゴムに多量に配合する方法に比べ、加工
性、硬度増加のいずれの面でもより改善されておシ、高
硬度ゴムを製造するには現在において最も好ましい方法
と考えられている。The method of blending this reactive resin into rubber has improved processability and increased hardness compared to the method of blending a large amount of denblack or sulfur into rubber, and can produce high-hardness rubber. It is currently considered the most preferred method of production.
しかしながら、反応性樹脂とコ８ムとの反応を促進させ
るだめに、反応性樹脂と共に使用される該反応性樹脂の
硬化剤であるヘキサメチレンテトラミン等のアルデヒド
供与体がコゝム組成物の加硫においては加硫促進剤とし
て働くためスコーチを促進させるという欠点がある。ま
だ、反応性樹脂と硬化剤の配合比がほぼ一定であること
が望ましいため、ゴムの硬度上昇を目的に反応性樹脂の
配合量を増やすと同時に硬化剤も増やさなければならず
、増々スコーチを早める結果となってしまう。このこと
から反応性樹脂および硬化剤配合のコゝムにあっては硬
度の上昇に対してスコーチタイムの短縮化はどうしても
避けられない現象であった（第１図（Ａ） （Ｂ）参照
）。However, in order to promote the reaction between the reactive resin and the comb composition, an aldehyde donor such as hexamethylenetetramine, which is a curing agent for the reactive resin, is added to the comb composition. Sulfur has the disadvantage of accelerating scorch because it acts as a vulcanization accelerator. Still, it is desirable that the mixing ratio of reactive resin and hardening agent be approximately constant, so in order to increase the hardness of the rubber, it is necessary to increase the amount of reactive resin mixed and at the same time increase the amount of hardening agent, which leads to an increase in scorch. This will result in haste. Therefore, for combs containing a reactive resin and a curing agent, it was inevitable that the scorch time would shorten as the hardness increased (see Figure 1 (A) and (B)). .
本発明はこの相反する現象を解決すべくなされたもので
、加工性を損うことなく加硫がムのＪＩＳ硬度、弾性率
を高くしたゴム組成物を提供するととを目的とし、特に
タイヤのビー−フィラー、ビードインシュレーションな
どの高硬度部所に利用される。The present invention was made in order to solve these contradictory phenomena, and aims to provide a rubber composition with high JIS hardness and elastic modulus of vulcanizate without impairing processability. Used for high hardness parts such as bee filler and bead insulation.
本発明者は前記目的に沿って鋭意研究の結果、前述の反
応性樹脂および硬化剤配合のゴムに着目し、反応性樹脂
としてカシューオイル変性率の高いカシューナラランエ
ルオイル変性クレゾール樹脂（以下、カシューオイル変
性クレゾール樹脂という）を用い、これと硬化剤をコゝ
ムに対して特定割合で配合しだコゞム組成物が前記目的
を満足することを見出し本発明に到達した。As a result of intensive research in line with the above objective, the present inventor focused on the rubber containing the above-mentioned reactive resin and curing agent, and as a reactive resin, cashew oil modified cresol resin (hereinafter referred to as The present inventors have discovered that a comb composition using a cashew oil-modified cresol resin (referred to as cashew oil-modified cresol resin) and blending this and a curing agent in a specific ratio with respect to the comb satisfies the above object.
前述のごとく、従来にあっても反応性樹脂および硬化剤
を配合して高硬度のゴムを得ることは知られている。し
かしながら、反応性樹脂の組成および変性剤の種類、変
性量についての開示はなく、変性率の高いカシューオイ
ル変性クレゾール樹脂を特定量配合することによって初
めて加工性の改良（スコーチの安定化）、高硬度付与と
いう相矛盾する特性が併せて達成されるのである。As mentioned above, it has been known in the past to obtain a rubber with high hardness by blending a reactive resin and a curing agent. However, there is no disclosure of the composition of the reactive resin, the type of modifier, and the amount of modification, and it is only by blending a specific amount of cashew oil-modified cresol resin with a high modification rate that the processability can be improved (scorch stabilization) and the The contradictory properties of imparting hardness are achieved at the same time.
すなわち本発明は、少なくとも１種以上のジエン系コゝ
ム１００重量部に対して、カシューオイル変性率４１％
のカシューオイル変性クレゾール樹脂２〜２５重量部と
該カシューオイル変性クレゾール樹脂に対して２〜２０
重量％のクレゾール樹脂硬化剤とを配合し硬化させてな
る高硬度ゴム組成物である。That is, in the present invention, the modification rate of cashew oil is 41% based on 100 parts by weight of at least one diene comb.
2 to 25 parts by weight of cashew oil-modified cresol resin and 2 to 20 parts by weight of the cashew oil-modified cresol resin.
This is a high hardness rubber composition formed by blending and curing % by weight of a cresol resin curing agent.
本発明に使用されるツエン系コ８ムとしては天然ゴムお
よびポリイソゾレンゴム、ポリブタクエンゴム、スチレ
／−ブタジェン共重合体ゴム、油展スチレン−ブタジェ
ン共重合体ゴム等のジエン系合成ゴムから選ばれる少く
とも１種以上のゴムである。The diene-based rubbers used in the present invention include natural rubber and diene-based synthetic rubbers such as polyisozolene rubber, polybutaquene rubber, styrene/-butadiene copolymer rubber, and oil-extended styrene-butadiene copolymer rubber. At least one type of rubber selected from:
また、本発明におけるカンニーオイル変性クレゾール樹
脂とは、通常酸性触媒下で過剰のクレゾール類とアルデ
ヒド類との付加重合によって得られるノボラ、り型熱可
塑性クレゾール樹脂（未変性クレゾール樹脂）を公知の
方法によりカシューナツツ殻液から得られるカシューオ
イルを変性油として使用して得られる。In addition, the canny oil-modified cresol resin in the present invention refers to a known novola-type thermoplastic cresol resin (unmodified cresol resin) obtained by addition polymerization of excess cresols and aldehydes under an acidic catalyst. It is obtained by using cashew oil obtained from cashew nut shell liquid according to the method as a modified oil.
カンニーオイル変性クレゾール樹脂の製法としては、ク
レゾール類、アルデヒド類およびカシーーオイルを同時
に仕込み反応させる方法と予め合成したクレゾール樹脂
を適当な溶媒に溶解させた後、カシーーオイルを添加し
て反応させる方法があるが、本発明においてはどちらも
使用可能である。なお、力／ニーオイル変性クレゾール
樹脂の変性率は次式により算出される。There are two methods for producing canny oil-modified cresol resin: a method in which cresols, aldehydes, and cassi oil are simultaneously charged and reacted; and a method in which pre-synthesized cresol resin is dissolved in an appropriate solvent, then cassi oil is added and reacted. However, both can be used in the present invention. Note that the modification rate of the force/knee oil-modified cresol resin is calculated by the following formula.
本発明におけるカシューオイル変性クレゾール樹脂の変
性率は４１％以上であることが必要である。変性率が４
１％未満では目的とする十分なＪＩＳ硬度、動的弾性率
が得られず好ましくない。The modification rate of the cashew oil-modified cresol resin in the present invention needs to be 41% or more. Denaturation rate is 4
If it is less than 1%, the desired JIS hardness and dynamic elastic modulus cannot be obtained, which is not preferable.
変性率が４１％以上であれば本発明の目的は達成される
が、変性率をあまシ増加させてもよりすぐれた効果が発
揮されるわけではなく、かえって変性反応が困難になり
かつ変性樹脂の軟化によシ硬度上昇の度合が低くなるの
で、カシューオイル変性クレゾール樹脂の変性率は１０
０チ以下にとどめておくことが望ましい。If the modification rate is 41% or more, the purpose of the present invention is achieved, but even if the modification rate is slightly increased, better effects will not be achieved, and the modification reaction will become more difficult and the modified resin The degree of increase in hardness is lower due to the softening of the resin, so the modification rate of cashew oil-modified cresol resin is 10.
It is desirable to keep it below 0.
本発明においてはカシューオイル変性クレゾール樹脂の
配合量はゴム（油展ゴムを使用する場合にはゴム分）１
００重量部に対して２〜２５重量部である。配合量が２
重量部未満では所望の硬度は得られず、また２５重量部
を超えるとゴムとの混合性が低下して破断強度、破断伸
びなどが低くなると共にスコーチタイムが早くなり加硫
時の加工性が悪くなる。In the present invention, the blending amount of cashew oil-modified cresol resin is rubber (rubber content when oil-extended rubber is used) 1
The amount is 2 to 25 parts by weight per 00 parts by weight. The amount is 2
If the amount is less than 25 parts by weight, the desired hardness cannot be obtained, and if it exceeds 25 parts by weight, the mixability with rubber decreases, resulting in lower breaking strength and elongation at break, as well as faster scorch time and poor processability during vulcanization. Deteriorate.
本発明にあっては、このカシュ−オイル変性クレゾール
樹脂の配合量に対して２〜２０重量％のクレゾール樹脂
硬化剤が配合される。クレゾール樹脂硬化剤の配合量が
２係より少ない場合はカシューオイル変性クレゾール樹
脂の硬化が不十分で動的弾性率およびＪＩＳ硬度の値が
低いレベルにあり好ましくない。一方、２０重量％を超
えて配合しても配合効果は特に認められず、むしろスコ
ーチタイムが早くなって加工安全性を著しく低下六せる
欠点がある。クレゾール樹脂硬化剤としてはホルムアル
デヒド、ノクラホルムアルデヒド、ヘキサメチジ／テト
ラミン等のホルムアルデヒド供与体が用いられるが、一
般にはへキサメチレンテトラミンが好適に使用される。In the present invention, a cresol resin curing agent is blended in an amount of 2 to 20% by weight based on the blended amount of the cashew oil modified cresol resin. If the blending amount of the cresol resin curing agent is less than 2 parts, the curing of the cashew oil-modified cresol resin is insufficient and the values of dynamic elastic modulus and JIS hardness are at low levels, which is not preferable. On the other hand, even if it is blended in an amount exceeding 20% by weight, no particular blending effect is observed, and the disadvantage is that the scorch time becomes faster and processing safety is significantly reduced. As the cresol resin curing agent, formaldehyde donors such as formaldehyde, noclaformaldehyde, and hexamethylenetetramine are used, but hexamethylenetetramine is generally preferably used.
本発明のゴム組成物にあってはこの他、通常、高硬度の
コゝム組成物に配合される酸化亜鉛、ステアリン酸、カ
ーピンブラック、イオウ、加硫促進剤等の配合剤が適宜
適量配合される。In addition, the rubber composition of the present invention contains appropriate amounts of compounding agents such as zinc oxide, stearic acid, carpin black, sulfur, and a vulcanization accelerator, which are usually added to high-hardness comb compositions. It is blended.
以下、本発明を実施例および比較例に基づいて具体的に
説明する。The present invention will be specifically described below based on Examples and Comparative Examples.
実施例１〜６および比較例１〜１０
第１表に示す配合のコ８ムおよび配合剤をパンパリミキ
サーで混練した後、１５０℃、２０分間プレス加硫して
この際のスコーチタイムを測定した。Examples 1 to 6 and Comparative Examples 1 to 10 After kneading the combs and ingredients shown in Table 1 in a Pampari mixer, press vulcanization was performed at 150°C for 20 minutes and the scorch time was measured. .
また、得られた加硫ゴムのＪＩＳ硬度および動的弾性率
を測定した。動的弾性率は粘弾性スペクトロメーター（
岩本製作所株式会社製）によって２５℃、１００℃にて
振動数周波数１００Ｈｚにおいて測定した。それぞれの
結果を第１表に示す。Furthermore, the JIS hardness and dynamic elastic modulus of the obtained vulcanized rubber were measured. The dynamic elastic modulus was measured using a viscoelastic spectrometer (
(manufactured by Iwamoto Seisakusho Co., Ltd.) at 25° C. and 100° C. at a frequency of 100 Hz. The results are shown in Table 1.
＊ ｔ ： ５ＢＲｔ７１２ （日本ゼオン社製）、伸
展油３７．５重量部含有、＊２：メタクレゾール樹脂、
＊６カシーーオイル変性率２０％、ルフェンアミド・
第１表において実施例１〜４および比較例１〜８は天然
ゴム系ゴム組成物であυ、実施例１〜３および比較例１
〜６は反応性樹脂の種類を変えた例である。カシューオ
イルまたはクレゾール樹脂を配合した比較例１〜２はＪ
ＩＳ硬度および動的弾性率が低く、カシューオイル配合
の比較例１にあってはスコーチタイムも短い。カシュー
オイル変性率の低いカシーーオイル変性クレゾール樹脂
を配合した比較例３〜４はＪＩＳ硬度および動的弾性率
が低く、スコーチタイムもやや短い。これに対してカシ
ューオイル変性率の高いカシューオイル変性クレゾール
樹脂を配合した実施例１〜３は、ＬＩＳ硬度および動的
弾性率が向上し、スコーチタイムも所望の範囲にある。*t: 5BRt712 (manufactured by Nippon Zeon), containing 37.5 parts by weight of extender oil, *2: metacresol resin,
*6 Cassie oil modification rate 20%, rufenamide In Table 1, Examples 1 to 4 and Comparative Examples 1 to 8 are natural rubber rubber compositions, Examples 1 to 3 and Comparative Example 1
-6 are examples in which the type of reactive resin was changed. Comparative Examples 1 and 2 containing cashew oil or cresol resin are J
Comparative Example 1, which has low IS hardness and dynamic elastic modulus and contains cashew oil, also has a short scorch time. Comparative Examples 3 and 4, in which cashew oil-modified cresol resins having a low cashew oil modification rate were blended, had low JIS hardness and dynamic elastic modulus, and had slightly short scorch times. On the other hand, Examples 1 to 3 in which cashew oil-modified cresol resin having a high cashew oil modification rate was blended had improved LIS hardness and dynamic elastic modulus, and the scorch time was also within the desired range.
カシューオイル変性フェノール樹脂または亜麻仁油変性
クレゾール樹脂を配合した比較例５〜６はＪＩＳ硬度お
よび動的弾性率が低く、カシューオイル変性フェノール
樹脂配合の比較例５にあってはスコーチタイムも短い。Comparative Examples 5 and 6 containing a cashew oil-modified phenolic resin or a linseed oil-modified cresol resin have low JIS hardness and dynamic elastic modulus, and Comparative Example 5 containing a cashew oil-modified phenolic resin has a short scorch time.
実施例４および比較例７〜８は実施例１で使用したカシ
ューオイル変性フェノール樹脂（カシューオイル変性率
４５％）の配合量を変量した例であるが、２０重量部配
合した実施例２においては、実施例１に比してＪＩＳ硬
度および動的弾性率はさらに向上し、スコーチタイムは
幾分短くなるが所望の範囲にある。３０重量部配合した
比較例７にあってはＪＩＳ硬度および動的弾性率は向上
するもののスコーチタイムが短く加工安定性に難点があ
る。１重量部配合した比較例８はＪＩＳ硬度および動的
弾性率が低（配合効果がないっ
実施例５〜６および比較例９〜１０はスチレ／−ブタジ
ェン共重合体コ８ム系ゴム組成物である。Example 4 and Comparative Examples 7 to 8 are examples in which the blending amount of the cashew oil-modified phenol resin (cashew oil modification rate: 45%) used in Example 1 was varied, but in Example 2, where 20 parts by weight was blended. Compared to Example 1, the JIS hardness and dynamic elastic modulus are further improved, and the scorch time is somewhat shorter, but still within the desired range. Comparative Example 7 containing 30 parts by weight improves JIS hardness and dynamic elastic modulus, but has short scorch time and poor processing stability. Comparative Example 8, in which 1 part by weight was blended, had low JIS hardness and dynamic modulus (no blending effect). It is.
この系においてもカシューオイル変性率の高いカシュー
オイル変性クレゾール樹脂（カシューオイル変性率４５
チ）を配合した実施例５〜６はカシューオイル変性フェ
ノール樹脂またはカシューオイル変性率の低いカシュー
オイル変性クレゾール樹脂（カシューオイル変性率４０
％）を配合した比較例９〜１０に比してＪＩＳ硬度およ
び動的弾性率が高い。Even in this system, cashew oil modified cresol resin with a high cashew oil modification rate (cashew oil modification rate 45
Examples 5 to 6 in which H.
%), the JIS hardness and dynamic elastic modulus are higher than those of Comparative Examples 9 and 10 in which %) were blended.
以上説明したごとく、コ８ムにカシー−オイル変性率の
高いカシーーオイル変性クレゾール樹脂およびクレゾー
ル樹脂硬化剤を特定割合配合してなる本発明のコゞム組
成物は加硫時の加工性に優れ、しかも高硬度の加硫コゝ
ムが得られることからタイヤのビードフィラー、ビード
インシュレーションなどの高硬度を要求される部所に好
適に利用される０As explained above, the comb composition of the present invention, which is made by blending a cassi oil-modified cresol resin with a high cassi-oil modification rate and a cresol resin curing agent in a specific proportion in the comb composition, has excellent processability during vulcanization. Furthermore, since a vulcanized comb with high hardness can be obtained, it is suitable for use in parts that require high hardness, such as tire bead fillers and bead insulation.
第１図（５）は天然デム系コ８ム組酸物におけるカシュ
ーオイル変性フェノール樹脂とへキサメチレンテトラミ
ンの配合量に対するＪＩＳ硬度とスコーチタイム（１２
５℃）の関係を示すグラフ、および第１図（Ｂ）は動的
弾性率とスコーチタイム（１２５℃プレス加硫）の関係
を示すグラフである。Figure 1 (5) shows the JIS hardness and scorch time (12
5°C), and FIG. 1(B) is a graph showing the relationship between dynamic elastic modulus and scorch time (press vulcanization at 125°C).
Claims (1)
して、カシューオイル変性率４１％以上の力／ニーナツ
ツシェルオイル変性クレゾール樹脂２〜２５重量部と該
カシューナツツシェルオイル変性クレゾール樹脂に対し
て２〜２０重量係のクレゾール樹脂硬化剤とを配合し硬
化させてなる高硬度ゴム組成物。A force of 41% or more in modification rate of cashew oil against 100 parts by weight of at least one or more tsene-based cobalt/2 to 25 parts by weight of peanut shell oil-modified cresol resin and the cashew nut shell oil-modified cresol resin. A high hardness rubber composition obtained by blending and curing 2 to 20 parts by weight of a cresol resin curing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57033764A JPS58152030A (en) | 1982-03-05 | 1982-03-05 | Rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57033764A JPS58152030A (en) | 1982-03-05 | 1982-03-05 | Rubber composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58152030A true JPS58152030A (en) | 1983-09-09 |
| JPH0148936B2 JPH0148936B2 (en) | 1989-10-23 |
Family
ID=12395499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57033764A Granted JPS58152030A (en) | 1982-03-05 | 1982-03-05 | Rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58152030A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100718164B1 (en) * | 2005-12-28 | 2007-05-15 | 금호산업주식회사 | Viscoelastic rubber compound for high damping |
| JP2009035683A (en) * | 2007-08-03 | 2009-02-19 | Yokohama Rubber Co Ltd:The | Rubber composition for tire |
| JP2010254166A (en) * | 2009-04-27 | 2010-11-11 | Bridgestone Corp | Rubber composition for rubber crawlers, and rubber crawler |
| US20120259051A1 (en) * | 2011-04-11 | 2012-10-11 | Tatsuya Miyazaki | Rubber composition for bead apex and pneumatic tire |
| JP2014177557A (en) * | 2013-03-15 | 2014-09-25 | Yokohama Rubber Co Ltd:The | Rubber composition for bead filler |
| CN110922649A (en) * | 2019-12-06 | 2020-03-27 | 桂林电子科技大学 | Rubber composite material and preparation method thereof |
| JP2021172710A (en) * | 2020-04-22 | 2021-11-01 | 横浜ゴム株式会社 | Rubber composition |
-
1982
- 1982-03-05 JP JP57033764A patent/JPS58152030A/en active Granted
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100718164B1 (en) * | 2005-12-28 | 2007-05-15 | 금호산업주식회사 | Viscoelastic rubber compound for high damping |
| JP2009035683A (en) * | 2007-08-03 | 2009-02-19 | Yokohama Rubber Co Ltd:The | Rubber composition for tire |
| JP2010254166A (en) * | 2009-04-27 | 2010-11-11 | Bridgestone Corp | Rubber composition for rubber crawlers, and rubber crawler |
| US20120259051A1 (en) * | 2011-04-11 | 2012-10-11 | Tatsuya Miyazaki | Rubber composition for bead apex and pneumatic tire |
| JP2014177557A (en) * | 2013-03-15 | 2014-09-25 | Yokohama Rubber Co Ltd:The | Rubber composition for bead filler |
| CN110922649A (en) * | 2019-12-06 | 2020-03-27 | 桂林电子科技大学 | Rubber composite material and preparation method thereof |
| CN110922649B (en) * | 2019-12-06 | 2022-02-08 | 桂林电子科技大学 | Rubber composite material and preparation method thereof |
| JP2021172710A (en) * | 2020-04-22 | 2021-11-01 | 横浜ゴム株式会社 | Rubber composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0148936B2 (en) | 1989-10-23 |
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