JPS63215729A - Process oil of insoluble sulfur for rubber - Google Patents
Process oil of insoluble sulfur for rubberInfo
- Publication number
- JPS63215729A JPS63215729A JP4870987A JP4870987A JPS63215729A JP S63215729 A JPS63215729 A JP S63215729A JP 4870987 A JP4870987 A JP 4870987A JP 4870987 A JP4870987 A JP 4870987A JP S63215729 A JPS63215729 A JP S63215729A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- process oil
- sulfur
- insoluble sulfur
- rubber
- 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
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 35
- 239000011593 sulfur Substances 0.000 title claims abstract description 35
- 239000010734 process oil Substances 0.000 title claims abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002253 acid Substances 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 abstract description 12
- 239000002480 mineral oil Substances 0.000 abstract description 6
- 239000002904 solvent Substances 0.000 abstract description 5
- 235000010446 mineral oil Nutrition 0.000 abstract description 4
- 229910021536 Zeolite Inorganic materials 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 abstract description 2
- 238000009903 catalytic hydrogenation reaction Methods 0.000 abstract description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010457 zeolite Substances 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 34
- 235000001508 sulfur Nutrition 0.000 description 29
- 238000011282 treatment Methods 0.000 description 27
- 239000010779 crude oil Substances 0.000 description 11
- 239000002585 base Substances 0.000 description 8
- 238000005984 hydrogenation reaction Methods 0.000 description 8
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000004821 distillation Methods 0.000 description 6
- 238000000638 solvent extraction Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 4
- 150000004996 alkyl benzenes Chemical class 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004018 waxing Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はゴム用不溶性硫黄のプロセスオイルに関し、詳
しくはゴム用不溶性硫黄に含浸させて長期間にわたって
該硫黄の不溶化率の低下を抑制することのできるプロセ
スオイルに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an insoluble sulfur process oil for rubber, and more specifically to impregnating it with insoluble sulfur for rubber to suppress a decrease in the insolubilization rate of the sulfur over a long period of time. Regarding process oil that can be used.
〔従来の技術および発明が解決しようとする問題点〕一
般に、ゴム用不溶性硫黄（日本ゴム協会５ＲＩＳ １
１０２−１９６７）には、移送時の安全対策（静電気の
発生防止など）やゴム練り時の作業上向上の目的で、プ
ロセスオイルが含浸されている。[Problems to be solved by the prior art and the invention] In general, insoluble sulfur for rubber (Japan Rubber Association 5 RIS 1
102-1967) is impregnated with process oil for the purpose of safety measures during transportation (prevention of static electricity, etc.) and to improve workability during rubber kneading.
ところで、不溶性硫黄は配合剤を異にする二種のゴムを
接着する場合、あるいは異なった組成のものが接触して
いるゴム製品、さらには透明なゴム製品や鮮やかな色ゴ
ム製品などに添加使用されている。この使用目的とする
ところは不溶性硫黄が他の硫黄に比べてゴム製品中での
移行ないし拡散が小さいため、ゴム製品のブルーム、ス
コーチ。By the way, insoluble sulfur is used when adhering two types of rubber with different compounding agents, or when adding rubber products where rubber products with different compositions are in contact, or when adding it to transparent rubber products or brightly colored rubber products. has been done. This is intended to prevent blooming and scorching of rubber products because insoluble sulfur migrates or diffuses less in rubber products than other sulfurs.
過加硫等が抑制できることにある。The reason is that overvulcanization, etc. can be suppressed.
しかしながら、この不溶性硫黄（これは主としてＳμの
形態であると考えられる。）は、本質的に不安定なもの
であって、結晶転移によって不溶化率（二硫化炭素不溶
分）が低下しやすいという問題を有しており、ひいては
最終ゴム製品の品質に影響を与える。However, this insoluble sulfur (which is thought to be mainly in the form of Sμ) is inherently unstable, and the problem is that the insolubilization rate (carbon disulfide insoluble content) tends to decrease due to crystal transition. , which in turn affects the quality of the final rubber product.
また、上述した不溶性硫黄の不溶化率は貯蔵時の温度に
も影響を受けるが、特に含浸するプロセスオイルの性状
に大きく左右される。Further, the insolubilization rate of the above-mentioned insoluble sulfur is influenced by the temperature during storage, but is particularly greatly influenced by the properties of the process oil to be impregnated.
本発明者らは、不溶性硫黄の不溶化率とプロセスオイル
の性状との相関に着眼して研究を重ねた結果、全酸価や
硫黄分の小さい高純度のプロセスオイルのうち、塩基性
窒素分が１０ｐｐｍ以下のものが目的とする不溶性硫黄
の不溶化率抑制に有効であることを見出した。本発明は
かかる知見に基いて完成したものである。As a result of repeated research focusing on the correlation between the insolubilization rate of insoluble sulfur and the properties of process oil, the present inventors found that among high-purity process oils with low total acid value and low sulfur content, basic nitrogen content is It has been found that a content of 10 ppm or less is effective in suppressing the insolubilization rate of insoluble sulfur. The present invention was completed based on this knowledge.
すなわち、本発明は４０℃における粘度５〜１５０ｃＳ
ｔ、全酸価０．１ ｍｇ ＫＯＨ／ ｇ以下、硫黄分０
．１重量％未満であり、かつ塩基性窒素分１０ｐｐｍ以
下であることを特徴とするゴム用不溶性硫黄のプロセス
オイルを提供するものである。That is, the present invention has a viscosity of 5 to 150 cS at 40°C.
t, total acid value 0.1 mg KOH/g or less, sulfur content 0
．． The present invention provides an insoluble sulfur processing oil for rubber, which is characterized by a basic nitrogen content of less than 1% by weight and a basic nitrogen content of 10 ppm or less.
本発明のプロセスオイルは、上述の如＜ ４０ ’Ｃに
おける粘度が５〜１５０ｃＳｔの範囲、好ましくは１０
〜５０ｃＳｔの範囲である。粘度が５ｃＳｔ未満のもの
では硫黄が分離してしまうという不都合があり、また１
５０ｃＳｔを越えるものでは硫黄が均一に分散されない
ので好ましくない。The process oil of the present invention has a viscosity in the range of 5 to 150 cSt at <40'C, preferably 10
~50 cSt. If the viscosity is less than 5 cSt, there is a problem that sulfur will separate, and 1
If it exceeds 50 cSt, sulfur will not be uniformly dispersed, which is not preferable.
さらに、本発明のプロセスオイルは、全酸価が０．１ｍ
ｇＫＯＨ／ ｇ以下、好ましくは０．０５■ＫＯＨ／ｇ
以下のものである。全酸価が０．１ｍｇＫＯＨ／ｇを越
えるものでは、不溶性硫黄の不溶化率が低下することと
なり、本発明の目的を達成しえないものとなる。Furthermore, the process oil of the present invention has a total acid value of 0.1 m
gKOH/g or less, preferably 0.05■KOH/g
These are as follows. If the total acid value exceeds 0.1 mgKOH/g, the insolubilization rate of insoluble sulfur will decrease, making it impossible to achieve the object of the present invention.
また、本発明のプロセスオイルは硫黄分が０．１重量％
未満のものが用いられる。本発明者らの研究によれば、
プロセスオイル中の硫黄分は多い方が不溶性硫黄の不溶
化率の抑制に有効であるという傾向が認められるが、硫
黄分が０．１重量％未満であっても、上述した粘度範囲
と全酸価ならびに塩基性窒素分１０ｐｐｍ以下のもので
あれば、充分に不溶性硫黄の不溶化率抑制に効果を奏す
ることができる。Furthermore, the process oil of the present invention has a sulfur content of 0.1% by weight.
Those below are used. According to the research of the present inventors,
There is a tendency that the higher the sulfur content in the process oil, the more effective it is in suppressing the insolubilization rate of insoluble sulfur. However, even if the sulfur content is less than 0.1% by weight, Also, if the basic nitrogen content is 10 ppm or less, it can be sufficiently effective in suppressing the insolubilization rate of insoluble sulfur.
このように本発明のプロセスオイルは、塩基性窒素分が
１０ｐｐｍ以下であることが必要であり、好ましくは５
ｐｐｍ以下である。ここで、塩基性窒素分が１０ｐｐ
ｍを越えると、不溶性硫黄の不溶化率を低下させるとい
う不都合が生じる。As described above, the process oil of the present invention needs to have a basic nitrogen content of 10 ppm or less, preferably 5 ppm or less.
ppm or less. Here, the basic nitrogen content is 10 pp
If it exceeds m, there will be a disadvantage that the insolubilization rate of insoluble sulfur will be reduced.
本発明のプロセスオイルは、上述の如き性状を有するも
のであれば、鉱油１合成油を問わず様々なものが使用可
能であり、特に制限はない。The process oil of the present invention is not particularly limited and may be any mineral oil or synthetic oil as long as it has the properties described above.
本発明のプロセスオイルとして用いることのできる鉱油
の具体例としては、パラフィン基系原油。A specific example of mineral oil that can be used as the process oil of the present invention is paraffin-based crude oil.
中間基系原油あるいはナフテン基系原油を常圧蒸留する
かあるいは常圧蒸留の残渣油を減圧蒸留して得られる留
出油を常法にしたがって精製することによって得られる
精製油、あるいは精製後さらに深脱ロウ処理することに
よって得られる深脱ロウ油などをあげることができる。Refined oil obtained by distilling intermediate base crude oil or naphthenic base crude oil at atmospheric pressure, or by refining the distillate obtained by distilling the residual oil of atmospheric distillation under reduced pressure in accordance with a conventional method, or further refined after refining. Examples include deep dewaxing oil obtained by deep dewaxing treatment.
この際の精製法は特に制限はなく様々な方法が考えられ
る。通常は（ａ）水素化処理、（ｂ）脱ロウ処理（溶剤
膜ロウまたは水添脱ロウ）、（Ｃ）溶剤抽出処理。There are no particular restrictions on the purification method at this time, and various methods can be considered. Usually, (a) hydrogenation treatment, (b) dewaxing treatment (solvent membrane waxing or hydrogenation dewaxing), and (C) solvent extraction treatment.
（ｄ）アルカリ蒸留または硫酸洗浄処理、（ｅ）白土処
理を単独であるいは適宜順序で組み合わせて行う。また
同一処理を複数段に分けて繰り返し行うことも有効であ
る。例えば、■留出油を水素化処理するか、または水素
化処理した後、アルカリ蒸留または硫酸洗浄処理を行う
方法、■留出油を水素化処理した後、脱ロウ処理する方
法、■留出油を溶剤抽出処理した後、水素化処理する方
法、■留出油に二段あるいは三段の水素化処理を行う、
またはその後にアルカリ蒸留または硫酸洗浄処理する方
法、さらには■上述した■〜■の如き処理後、再度脱ロ
ウ処理して深脱ロウ油とする方法などがある。(d) Alkaline distillation or sulfuric acid washing treatment, and (e) clay treatment are carried out singly or in combination in an appropriate order. It is also effective to repeat the same process in multiple stages. For example, ■ a method in which distillate oil is hydrotreated or hydrotreated and then subjected to alkaline distillation or sulfuric acid washing treatment; ■ a method in which distillate oil is hydrotreated and then dewaxed; ■ distillation A method of hydrotreating oil after solvent extraction; ■ Two- or three-stage hydrotreating of distillate oil;
Alternatively, there is a method in which the oil is then subjected to an alkali distillation or sulfuric acid washing treatment, and a method in which the oil is subjected to dewaxing treatment again after the above-mentioned treatments such as (i) to (ii) to obtain a deeply dewaxed oil.
いずれの方法によっても、得られるプロセスオイルの性
状が、前述した粘度、全酸価、硫黄分および塩基性窒素
分となるように調整すればよい。Regardless of which method is used, the properties of the process oil obtained may be adjusted to have the above-mentioned viscosity, total acid value, sulfur content, and basic nitrogen content.
特に、本発明では深脱ロウ処理によって得られる鉱油が
プロセスオイルとして好適である。この深脱ロウ処理は
、苛酷な条件下での溶剤膜ロウ処理法やゼオライト触媒
を用いた接触水添脱ロウ処理法などによって行われる。In particular, mineral oil obtained by deep dewaxing treatment is suitable as the process oil in the present invention. This deep dewaxing treatment is performed by a solvent membrane waxing method under severe conditions, a catalytic hydrogenation dewaxing method using a zeolite catalyst, or the like.
また、本発明のプロセスオイルとしては、上述の鉱油以
外に、アルキルベンゼン、ポリブテンあるいはポリ（α
−オレフィン）の如き合成油であってもよく、またこれ
らの混合物であってもよい。In addition to the mineral oils mentioned above, the process oil of the present invention may include alkylbenzene, polybutene or poly(α
-Olefin), or a mixture thereof.
次に、本発明を実施例によりさらに詳しく説明する。 Next, the present invention will be explained in more detail with reference to Examples.
実施例１〜７および比較例１〜４
第１表に示す性状の鉱油あるいは合成油を試料油とし、
次の要領で不溶性硫黄の不溶化率を測定した。Examples 1 to 7 and Comparative Examples 1 to 4 Mineral oils or synthetic oils with properties shown in Table 1 were used as sample oils,
The insolubilization rate of insoluble sulfur was measured in the following manner.
すなわち、不溶性硫黄１±０．１ｇを１００ｍｊ２容の
ガラス容器にとり、その中に前記試料油を２０±１ｇ入
れた。それを１００ ”Ｃの液浴中で撹拌しながら、１
時間加熱した。その後ただちに５〜ＩＯ℃の冷水で冷や
し二硫化炭素を約２０ｍ！加えて撹拌し、その溶液をＩ
Ｇ−４のガラスフィルターで濾過した。フィルターで捕
捉した物をさらに約１００ｍｌの二硫化炭素で洗浄し、
６０℃で１時間乾燥後、秤量し不溶性硫黄の不溶化率を
求めた。That is, 1±0.1 g of insoluble sulfur was placed in a 100 mj2 glass container, and 20±1 g of the sample oil was placed therein. While stirring it in a liquid bath at 100"C,
heated for an hour. Immediately after that, cool with cold water at 5 to IO℃ and remove about 20 m of carbon disulfide! Add and stir, and add the solution to I
It was filtered through a G-4 glass filter. The material captured by the filter was further washed with approximately 100 ml of carbon disulfide, and
After drying at 60° C. for 1 hour, it was weighed to determine the insolubilization rate of insoluble sulfur.
結果を第１表に示す。The results are shown in Table 1.
＊１ 水素化精製油：中間基系原油からの留出油を二段
水素化処理したもの
＊２ 深脱ロウ油：＊１の油を水添脱ロウ処理したもの
＊３ アルキルベンゼン：アルキルベンゼンハード
＊４，５ 酸処理油：ナフテン基系原油（ベネズエラ原
油）からの留出油を溶剤抽出処
理−水素化処理一硫酸洗浄処理一白土
処理したもの
＊６ 水素化精製油：中間基系原油からの留出油を二段
水素化処理したもの
＊７ 溶剤抽出油：中間基系原油からの留出油を溶剤抽
出処理−水素化処理−白土処理したもの
＊８ 市販油
＊９ 溶剤抽出油：中間基系原油からの留出油を溶剤抽
出処理−水素化処理したもの
＊１０ 留出油：中間基系原油からの留出油（脱硫処
理のみ）
＊１１ アルカリ蒸留油：中間基系原油からの留出油
をアルカリ蒸留処理−水素化処理したもの
〔発明の効果〕
如上の如く、本発明のプロセスオイルを用いれば、ゴム
に配合すべき不溶性硫黄の不溶化率低下を効果的に抑制
することができる。したがって、本発明のプロセスオイ
ルは、不溶性硫黄を安定化させることができる結果とし
て、高品質のゴム製品の製造を可能ならしめるものであ
る。*1 Hydrotreated oil: Distillate oil from intermediate base crude oil subjected to two-stage hydrogenation treatment *2 Deeply dewaxed oil: *1 oil subjected to hydrodewaxing treatment *3 Alkylbenzene: Alkylbenzene hard * 4,5 Acid-treated oil: Distilled oil from naphthenic crude oil (Venezuela crude oil) subjected to solvent extraction treatment, hydrogenation treatment, monosulfuric acid washing treatment, and clay treatment*6 Hydrotreated refined oil: Distilled oil from intermediate base crude oil Distillate oil subjected to two-stage hydrogenation treatment *7 Solvent extracted oil: Distillate oil from intermediate base crude oil subjected to solvent extraction treatment - hydrogenation treatment - clay treatment *8 Commercial oil *9 Solvent extracted oil: Intermediate Distillate oil from base crude oil subjected to solvent extraction treatment and hydrogenation treatment *10 Distillate oil: Distillate oil from intermediate base crude oil (desulfurization treatment only) *11 Alkaline distilled oil: Distilled oil from intermediate base crude oil Distillate oil subjected to alkaline distillation treatment and hydrogenation treatment [Effects of the invention] As described above, by using the process oil of the present invention, it is possible to effectively suppress the decrease in the insolubilization rate of insoluble sulfur to be blended into rubber. can. Therefore, the process oil of the present invention can stabilize insoluble sulfur, making it possible to produce high-quality rubber products.
それ故、本発明のプロセスオイルは、タイヤ。Therefore, the process oil of the present invention is useful for tires.
玩具など様々なゴム製品を製造する産業分野において幅
広くかつ有効に利用される。It is widely and effectively used in industrial fields that manufacture various rubber products such as toys.
Claims (1)
．１ｍｇＫＯＨ／ｇ以下、硫黄分０．１重量％未満であ
り、かつ塩基性窒素分１０ｐｐｍ以下であることを特徴
とするゴム用不溶性硫黄のプロセスオイル。(1) Viscosity at 40°C 5 to 150 cSt, total acid value 0
．． An insoluble sulfur process oil for rubber, characterized in that it has a sulfur content of 1 mgKOH/g or less, a sulfur content of less than 0.1% by weight, and a basic nitrogen content of 10 ppm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4870987A JPS63215729A (en) | 1987-03-05 | 1987-03-05 | Process oil of insoluble sulfur for rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4870987A JPS63215729A (en) | 1987-03-05 | 1987-03-05 | Process oil of insoluble sulfur for rubber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63215729A true JPS63215729A (en) | 1988-09-08 |
| JPH0573127B2 JPH0573127B2 (en) | 1993-10-13 |
Family
ID=12810841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4870987A Granted JPS63215729A (en) | 1987-03-05 | 1987-03-05 | Process oil of insoluble sulfur for rubber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63215729A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT401775B (en) * | 1991-12-18 | 1996-11-25 | Semperit Ag | VEHICLE TIRES |
| US6602942B1 (en) * | 1999-03-31 | 2003-08-05 | Zeon Corporation | Oil-extended rubber, process for producing the same, rubber composition, and crosslinked object |
| JP2006124474A (en) * | 2004-10-27 | 2006-05-18 | Sumitomo Rubber Ind Ltd | Rubber composition for covering steel cord and steel cord covered with the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462146A (en) * | 1945-12-03 | 1949-02-22 | Stauffer Chemical Co | Stabilization of insoluble sulfur |
| US2667406A (en) * | 1950-12-19 | 1954-01-26 | Olin Mathieson | Process for producing insoluble sulfur |
| US2947614A (en) * | 1954-03-13 | 1960-08-02 | Ruhrgas Ag | Method of making insoluble sulphur |
| US3706708A (en) * | 1970-09-28 | 1972-12-19 | Stauffer Chemical Co | Uniformly dispersible insoluble sulfur vulcanizing compositions |
| US4238470A (en) * | 1979-07-30 | 1980-12-09 | Stauffer Chemical Company | Method for oil-treating insoluble sulfur |
-
1987
- 1987-03-05 JP JP4870987A patent/JPS63215729A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2462146A (en) * | 1945-12-03 | 1949-02-22 | Stauffer Chemical Co | Stabilization of insoluble sulfur |
| US2667406A (en) * | 1950-12-19 | 1954-01-26 | Olin Mathieson | Process for producing insoluble sulfur |
| US2947614A (en) * | 1954-03-13 | 1960-08-02 | Ruhrgas Ag | Method of making insoluble sulphur |
| US3706708A (en) * | 1970-09-28 | 1972-12-19 | Stauffer Chemical Co | Uniformly dispersible insoluble sulfur vulcanizing compositions |
| US4238470A (en) * | 1979-07-30 | 1980-12-09 | Stauffer Chemical Company | Method for oil-treating insoluble sulfur |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT401775B (en) * | 1991-12-18 | 1996-11-25 | Semperit Ag | VEHICLE TIRES |
| US6602942B1 (en) * | 1999-03-31 | 2003-08-05 | Zeon Corporation | Oil-extended rubber, process for producing the same, rubber composition, and crosslinked object |
| JP2006124474A (en) * | 2004-10-27 | 2006-05-18 | Sumitomo Rubber Ind Ltd | Rubber composition for covering steel cord and steel cord covered with the same |
| JP4553682B2 (en) * | 2004-10-27 | 2010-09-29 | 住友ゴム工業株式会社 | Rubber composition for coating steel cord and steel cord coated thereby |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0573127B2 (en) | 1993-10-13 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |