JPH06234880A - Rubber mastication promoter - Google Patents

Rubber mastication promoter

Info

Publication number
JPH06234880A
JPH06234880A JP5926793A JP5926793A JPH06234880A JP H06234880 A JPH06234880 A JP H06234880A JP 5926793 A JP5926793 A JP 5926793A JP 5926793 A JP5926793 A JP 5926793A JP H06234880 A JPH06234880 A JP H06234880A
Authority
JP
Japan
Prior art keywords
mastication
rubber
promoter
effect
iron
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
Application number
JP5926793A
Other languages
Japanese (ja)
Inventor
Takashi Watanabe
隆 渡邊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP5926793A priority Critical patent/JPH06234880A/en
Publication of JPH06234880A publication Critical patent/JPH06234880A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To obtain a rubber mastication promoter for improving or manifesting rubber mastication-promoting effect, by incorporating an activating agent in the chief agent, an inexpensive, general-purpose thiazole-based curing promoter. CONSTITUTION:The rubber mastication promoter highly excellent in such promoting effect by incorporating (A) a thiazole-based curing promoter [2- mercaptobenzothiazole (MBT), dibenzothiazyl disulfide (MBTS) or mercaptobenzothiazole zinc salt (ZnMBT)] in (B) iron-phthalocyanine complex.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は新しい知見に基づくゴム
用素練促進剤に関するものである。更に詳しくは、本発
明はチアゾール系加硫促進剤、例えば2−メルカプトベ
ンゾチアゾール[MBT;通称M]、ジベンゾチアジル
ジスルフィド[MBTS;通称DM]、及び2−メルカ
プトベンゾチアゾール亜鉛塩[ZnMBT;通称MZ]
を主剤とし、これに活性化剤としてフタロシアニン鉄を
配合したものを、ゴム用素練促進剤として用いるもので
ある。
FIELD OF THE INVENTION The present invention relates to a mastication accelerator for rubber based on a new finding. More specifically, the present invention relates to thiazole vulcanization accelerators such as 2-mercaptobenzothiazole [MBT; common name M], dibenzothiazyl disulfide [MBTS; common name DM], and 2-mercaptobenzothiazole zinc salt [ZnMBT; common name]. MZ]
Is used as a main ingredient, and iron phthalocyanine is added as an activator to this as a mastication accelerator for rubber.

【従来の技術】天然ゴムを原料としてゴム製品を生産す
る場合の加工プロセスでは、まず天然ゴムをロール又は
バンバリーミキサーで分子を切断して分子量を低下させ
る素練工程と、可塑化したのち、各種の有機ゴム薬品
(加硫剤、加硫促進剤、老化防止剤、オゾン劣化防止剤
など)や、加硫促進助剤(酸化亜鉛、ステアリン酸)、
カーボンブラック、プロセスオイル、その他の配合剤を
添加、混合する混練工程が必要である。
2. Description of the Related Art In the process of producing a rubber product using natural rubber as a raw material, first, a natural rubber is cut with a roll or a Banbury mixer to reduce the molecular weight, and a plasticizing process is carried out. Organic rubber chemicals (vulcanizing agents, vulcanization accelerators, antioxidants, antiozonants, etc.), vulcanization accelerating aids (zinc oxide, stearic acid),
A kneading step of adding and mixing carbon black, process oil, and other compounding agents is required.

【0002】この際、分子量を低下させ加工しやすくす
るための素練工程では素練促進剤が用いられる。従来、
素練促進剤としては、多くの芳香族メルカプタン類、ジ
スルフィド類、メルカプタン金属塩、例えばβ−ナフチ
ルメルカプタン、t−ブチル−o−チオクレゾール、ペ
ンタクロロチオフェノール、ベンツアミドチオフェノー
ルなどの誘導体が用いられてきた[例えば 渡邊 隆;
日本ゴム協会誌、63,639(1990)]。またチ
アゾール系加硫促進剤の素練促進効果について、メルカ
プトベンゾチアゾール[MBT]は多少の効果はある
が、ジベンゾチアジルジスルフィド[MBTS]は全く
効果が無いという報告[NOC技術ノートNo.48
(大内新興化学工業(株));日本ゴム協会誌;37
148(1964)]がある。一方、これらの素練促進
剤に活性化剤として、各種の金属塩、例えばジチオカル
バミン酸ニッケル塩[Verbanc,J.J.;In
d.Eng.Chem.,44,1023(195
2)]、フタロシアニン鉄[DuPont;BP776
101]、ポルホリン金属塩[Bayer;BP 83
5391]等を添加する方法などが検討されているが、
本発明のように、チアゾール系加硫促進剤に活性化剤と
してこれらの金属塩を加え、素練促進剤として用いるこ
とは全く検討されていない。
At this time, a mastication accelerator is used in the mastication step for lowering the molecular weight and facilitating the processing. Conventionally,
As the mastication accelerator, many aromatic mercaptans, disulfides, mercaptan metal salts, for example, β-naphthyl mercaptan, t-butyl-o-thiocresol, pentachlorothiophenol, benzamide thiophenol, and other derivatives are used. [Eg Takashi Watanabe;
The Japan Rubber Association, 63 , 639 (1990)]. Regarding the mastication promoting effect of the thiazole vulcanization accelerator, mercaptobenzothiazole [MBT] has some effect, but dibenzothiazyl disulfide [MBTS] has no effect [NOC Technical Note No. 48
(Ouchi Shinko Chemical Industry Co., Ltd.); Japan Rubber Association Magazine; 37 ,
148 (1964)]. On the other hand, various metal salts such as nickel dithiocarbamate [Verbanc, J. et al. J. ; In
d. Eng. Chem. , 44 , 1023 (195
2)], iron phthalocyanine [DuPont; BP776
101], porphorin metal salt [Bayer; BP 83
5391] and the like are being studied.
As in the present invention, the addition of these metal salts as an activator to a thiazole vulcanization accelerator and using it as a mastication accelerator has not been studied at all.

【0003】[0003]

【発明が解決しようとする課題】現在、ゴム工業界にお
いては、その配合剤として用いられる有機ゴム薬品の毒
性に対する関心が高まり、より少量の有機ゴム薬品を用
い、かつ、活性化剤などの活用により、その効果を増大
させたものを効率的に使用しようとする機運がある。
At present, in the rubber industry, interest in the toxicity of organic rubber chemicals used as a compounding agent is increasing, and a smaller amount of organic rubber chemicals is used and an activating agent or the like is used. Therefore, there is an opportunity to efficiently use the one with the increased effect.

【0004】[0004]

【課題を解決するための手段】本発明は、有機ゴム薬品
中、加硫促進剤又はその原料として最も大量に生産さ
れ、かつ、安価でもあり、従来、実用性はないが多少の
素練促進効果を有するといわれている2−メルカプトベ
ンゾチアゾール[MBT]をはじめ、従来、全くその効
果がないといわれていたジベンゾチアジルジスルフィド
[MBTS]、また全く素練促進剤としての検討がなさ
れていなかったメルカプトベンゾチアゾール亜鉛塩[Z
nMBT]に、少量のフタロシアニン鉄を添加すること
により、素練促進剤としての効果の向上を図った。
The present invention is produced in the largest amount as a vulcanization accelerator or a raw material thereof in organic rubber chemicals, and is also inexpensive, which is not practical in the past but accelerates mastication to some extent. 2-Mercaptobenzothiazole [MBT], which is said to have an effect, dibenzothiazyl disulfide [MBTS], which has been said to have no effect at all, has not been studied as a mastication accelerator at all. Mercaptobenzothiazole zinc salt [Z
nMBT] was added with a small amount of iron phthalocyanine to improve the effect as a mastication accelerator.

【0005】[0005]

【作用】本発明によるチアゾール系加硫促進剤とフタロ
シアニン鉄の配合物は、ゴムの素練りを効果的に行うも
のである。以下、実施例において、本発明によるチアゾ
ール系加硫促進剤を主剤とし、活性化剤としてフタロシ
アニン鉄を併用したものが、試料無添加の場合はいうま
でもなく、加硫促進剤単独、又は活性化剤単独の場合よ
り、著しくその素練促進効果を向上させることを説明す
る。なおこれらの薬剤は、ゴムに対する分散性を助長す
るため、オイル、クレー又はステアリン酸なとで希釈す
ることができる。
The compound of the thiazole vulcanization accelerator and iron phthalocyanine according to the present invention effectively masticates rubber. In the following examples, the thiazole-based vulcanization accelerator according to the present invention is used as the main agent, and iron phthalocyanine iron is used as an activator, not to mention the case where no sample is added. It will be explained that the mastication promoting effect is remarkably improved as compared with the case of using the agent alone. These agents can be diluted with oil, clay or stearic acid in order to promote dispersibility in rubber.

【0006】[0006]

【実施例1】 [供試試料の作成] [オイル・クレー希釈の場合]0.024molのチア
ゾール系加硫促進剤([MBT]として40g)及び一
定量のフタロシアニン鉄を乳鉢にとり、これにプロセス
オイル1.0gを加えて良く混合し、更にクレーを加え
て全体で10.0gとし、供試試料とした。 [ステアリン酸希釈の場合]ステアリン酸を全体で1
0.0gになるように秤量後、熔融させ、これにチアゾ
ール系加硫促進剤、0.024mol及び一定量のフタ
ロシアニン鉄を加え、良く混合した後、バットにあけて
固化させ、フレーク状態に破砕して供試試料とした。な
おチアゾール系加硫促進剤は市販品をそのまま用い、フ
タロシアニン鉄は友星化学工業株式会社製の精製品を、
またプロセスオイル、クレー、ステアリン酸は市販品を
そのまま用いた。これらの供試試料の配合比を表1に示
す。
Example 1 [Preparation of test sample] [In the case of dilution with oil / clay] 0.024 mol of a thiazole vulcanization accelerator (40 g as [MBT]) and a certain amount of iron phthalocyanine were placed in a mortar and processed. 1.0 g of oil was added and mixed well, and clay was further added to make 10.0 g to make a test sample. [In the case of diluting stearic acid] 1 stearic acid in total
Weigh it to 0.0 g, melt it, add thiazole vulcanization accelerator, 0.024 mol and a certain amount of iron phthalocyanine iron to it, mix well, then open in a vat to solidify and crush into flakes. And used as a test sample. The thiazole vulcanization accelerator is a commercially available product, and the phthalocyanine iron is a refined product manufactured by Yusei Chemical Industry Co., Ltd.
As the process oil, clay, and stearic acid, commercially available products were used as they were. Table 1 shows the compounding ratio of these test samples.

【0007】[0007]

【表1】 [Table 1]

【0008】[0008]

【実施例2】 [素練試験方法]100℃に設定したラ
ボストミルC型[ローター形状:バンバリータイプ60
0ml(B 600);ローター回転数50rpm]を
用い、天然ゴム(RSS#1)400g及び供試試料
0.8g(ゴムに対し0.2phr)をホッパーに投入
し、3分間混練りを行ったのち、排出ゴムを6インチロ
ールにて1〜2回、シート出しを行い、48時間、室温
に放置、JIS K 6300に準じ、ムーニー粘度計
にてムーニー粘度[ML1+4(100±1℃)]を測
定した。
[Example 2] [Mastication test method] Labostomil C type set at 100 ° C [Rotor shape: Banbury type 60]
0 ml (B 600); rotor rotation speed 50 rpm], 400 g of natural rubber (RSS # 1) and 0.8 g of a test sample (0.2 phr with respect to rubber) were put into a hopper and kneaded for 3 minutes. After that, the discharged rubber is subjected to sheet ejection with a 6-inch roll once or twice and left at room temperature for 48 hours, and according to JIS K 6300, Mooney viscosity [ML 1 + 4 (100 ± 1 ° C)] with a Mooney viscometer. Was measured.

【0009】[0009]

【実施例3】 [素練促進試験 1]表1の供試試料を
用い、フタロシアニン鉄を併用した場合と、チアゾール
系加硫促進剤及びフタロシアニン鉄単独の場合の素練促
進効果の比較を行った。その結果を表2に示す。
[Example 3] [Mixing acceleration test 1] Using the test samples shown in Table 1, the mastication promoting effect of the case where iron phthalocyanine is used in combination and the case of using thiazole vulcanization accelerator and phthalocyanine iron alone are compared. It was The results are shown in Table 2.

【0010】[0010]

【表2】 [Table 2]

【0011】[0011]

【実施例4】 [素練促進試験 2]表1の供試試料を
用い、供試試料の添加量の素練促進効果に与える影響に
ついての結果を表3に示す。
Example 4 [Mixing acceleration test 2] Using the test samples of Table 1, Table 3 shows the results of the effect of the addition amount of the sample on the mastication promoting effect.

【0012】[0012]

【表3】 [Table 3]

【0013】[0013]

【実施例5】 [素練促進試験 3]表1の供試試料を
用い、フタロシアニン鉄の添加量の素練促進効果に与え
る影響についての結果を表4に示す。
Example 5 [Mastication acceleration test 3] Using the test samples in Table 1, Table 4 shows the results of the effect of the addition amount of iron phthalocyanine iron on the mastication acceleration effect.

【0014】[0014]

【表4】 [Table 4]

【0015】[0015]

【実施例6】 [素練促進試験 4]表1の供試試料を
用い、MBTとMBTSの効果の比較、及び希釈剤の素
練促進効果に与える影響についての結果を表5に示す。
Example 6 [Mastication acceleration test 4] Table 5 shows the results of comparison of the effects of MBT and MBTS and the effect of the diluent on the mastication acceleration effect, using the test samples in Table 1.

【0016】[0016]

【表5】 [Table 5]

【0017】[0017]

【結果の説明】表2の結果に示すように、チアゾール系
加硫促進剤であるメルカプトベンゾチアゾール[MB
T]は、試料無添加の場合のムーニー粘度90に比し、
MBT0.2phrを添加した場合はムーニー粘度85
と多少素練促進効果が認められたが実用化されるほどの
効果ではなかった。しかし、このものはその量を40%
に減量し、活性化剤としてその5%のフタロシアニン鉄
[供試試料に対しては2%]を加えることにより、10
0%MBTの場合のムーニー粘度85と比較し、ムーニ
ー粘度77と著しくその素練促進効果を向上させること
が認められた。また従来は、素練促進効果がないといわ
れていたジベンゾチアジルジスルィド[MBTS]や、
全くその素練促進効果が認められていなかったメルカプ
トベンゾチアゾール亜鉛塩[ZnMBT]までもがフタ
ロシアニン鉄を添加することにより、それぞれムーニー
粘度を70,60と低下し、著しい素練促進効果を示す
ことが確認された。また表3,4の結果より、これらの
供試試料はその使用量、又は供試試料中のフタロシアニ
ン鉄の量を増やすことにより、その効果を増大させるこ
とができることが認められ、その配合量により、使用ニ
ーズに適合させることができることが分かった。また表
5の結果より、フィラーのオイル・クレーの場合とステ
アリン酸の場合では、その効果に差は認められなかっ
た。またオイル・クレーの場合は、MBTがMBTSよ
り効果が低かったが、これはオイル・クレーの場合のM
BT配合物は固化し易く、ゴムに対する分散性が悪かっ
たためと考えられた。
[Explanation of Results] As shown in the results of Table 2, the thiazole-based vulcanization accelerator mercaptobenzothiazole [MB
T] is compared with the Mooney viscosity of 90 when no sample is added,
Mooney viscosity of 85 when MBT 0.2 phr is added
A mastication promoting effect was recognized to some extent, but it was not an effect that could be put to practical use. However, this one is 40%
10% by adding 5% of iron phthalocyanine [2% for the test sample] as an activator.
It was confirmed that the Mooney viscosity of 77 significantly improved the mastication promoting effect as compared with the Mooney viscosity of 85 in the case of 0% MBT. In the past, dibenzothiazyl disulphide [MBTS], which was said to have no mastication-accelerating effect,
The addition of phthalocyanine iron to mercaptobenzothiazole zinc salt [ZnMBT], for which no mastication-accelerating effect was observed at all, reduced the Mooney viscosity to 70, 60, and showed a remarkable mastication-accelerating effect. Was confirmed. Further, from the results of Tables 3 and 4, it was confirmed that the effect of these test samples can be increased by increasing the amount of the phthalocyanine iron used in the test sample or the amount of phthalocyanine iron in the test sample. , Found that it can be adapted to the needs of use. Further, from the results in Table 5, no difference was observed in the effect between the oil-clay filler and stearic acid. In the case of oil clay, MBT was less effective than MBTS.
It was considered that the BT compound was easily solidified and had poor dispersibility in rubber.

【0018】[0018]

【発明の効果】以上の結果より、本発明によるチアゾー
ル系加硫促進剤を主剤とし、これに活性化剤としてフタ
ロシアニン鉄を配合し、フィラーで希釈したものは、そ
の主剤及び活性化剤量が、主剤単独の場合に比較して少
ない配合量でも著しい素練促進効果を示すことが確認さ
れた。またチアゾール系加硫促進剤は、それ自身、更に
はスルフェンアミド系加硫促進剤の原料として、有機ゴ
ム薬品中の中核をなし、大量に生産されている安価なも
のである。これらを主剤とし、これに活性化剤として少
量のフタロシアニン鉄を添加し、素練促進効果を増大せ
しめたことは、ゴム工業界に多大の貢献をすることにな
る。
From the above results, the thiazole-based vulcanization accelerator according to the present invention is used as the main agent, iron phthalocyanine iron is added as the activator, and the mixture is diluted with the filler. It was confirmed that even with a small amount of the main ingredient, a remarkable mastication promoting effect was exhibited as compared with the case of using the main ingredient alone. Further, the thiazole-based vulcanization accelerator itself is a raw material for the sulfenamide-based vulcanization accelerator, is the core of the organic rubber chemicals, and is inexpensive and mass-produced. Using these as the main agents and adding a small amount of iron phthalocyanine as an activator to them to increase the mastication promoting effect makes a great contribution to the rubber industry.

【0019】[0019]

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 チアゾール系加硫促進剤を主剤とし、活
性化剤としてフタロシアニン鉄を含有するゴム用素練促
進剤。
1. A mastication accelerator for rubber, which comprises a thiazole vulcanization accelerator as a main component and iron phthalocyanine as an activator.
JP5926793A 1993-02-09 1993-02-09 Rubber mastication promoter Pending JPH06234880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5926793A JPH06234880A (en) 1993-02-09 1993-02-09 Rubber mastication promoter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5926793A JPH06234880A (en) 1993-02-09 1993-02-09 Rubber mastication promoter

Publications (1)

Publication Number Publication Date
JPH06234880A true JPH06234880A (en) 1994-08-23

Family

ID=13108434

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5926793A Pending JPH06234880A (en) 1993-02-09 1993-02-09 Rubber mastication promoter

Country Status (1)

Country Link
JP (1) JPH06234880A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004500471A (en) * 2000-03-21 2004-01-08 フレクシス アメリカ エル. ピー. Pyrimidine derivatives as hardness stabilizers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004500471A (en) * 2000-03-21 2004-01-08 フレクシス アメリカ エル. ピー. Pyrimidine derivatives as hardness stabilizers

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