JP4531483B2 - Rubber member - Google Patents
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- JP4531483B2 JP4531483B2 JP2004235179A JP2004235179A JP4531483B2 JP 4531483 B2 JP4531483 B2 JP 4531483B2 JP 2004235179 A JP2004235179 A JP 2004235179A JP 2004235179 A JP2004235179 A JP 2004235179A JP 4531483 B2 JP4531483 B2 JP 4531483B2
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Description
本発明は、気体又は液体のジメチルエーテルと接触する装置に使用されるゴム部材、並びに気体又は液体のジメチルエーテル及び気体又は液体のプロパンと接触する装置に使用されるゴム部材に関する。 The present invention is a rubber member used in the apparatus in contact with dimethyl ether in the gas, or liquid, and to a rubber member used in the apparatus in contact with gas or dimethyl ether and gas or propane liquid in the liquid.
ジメチルエーテル(DME)は、天然ガス、随伴ガス、石炭などをガス化して得られる合成ガス(CO2,H2)を原料としてDME合成によって得られ、燃焼したときに煤煙、SOxを発生せず、またNOxの発生も少ないことから、最近、環境にやさしい燃料として供給が輸入に依存するプロパンガス(LPG)の代替燃料として注目されている。 Dimethyl ether (DME) is obtained by DME synthesis using synthesis gas (CO 2 , H 2 ) obtained by gasifying natural gas, associated gas, coal, etc., and does not generate soot and SOx when burned. In addition, since NOx generation is small, it has recently attracted attention as an alternative fuel for propane gas (LPG) whose supply depends on imports as an environmentally friendly fuel.
従来、LPG・LNGなどの気体又は液体に接触する装置に用いられるO−リングやダイヤフラムの様なゴム系シール材にはNBRやHNBRが使用されている。同様に、耐DME用のゴム組成物としても、たとえばアクリロニトリルを38重量%以上有するNBRないしHNBRが使用されている(特開2000−137391号)。
LPG等の代替とされるDME、上述のNBRやHNBRを使用したシール材では、長期間の仕様により、膨潤が大きくなり、ケースからのはみ出しによる破損、漏れ、圧力調整不能を起こし、製品としての機能を果たさなくなるという欠点がある。 With DME, which is an alternative to LPG, and the above-mentioned NBR and HNBR seal materials, swelling will increase due to long-term specifications, causing damage, leakage, and pressure adjustment failure due to protrusion from the case. There is a drawback that it does not function.
本発明は上述の課題に鑑みなされたものであり、気体又は液体のDMEと接触する装置に使用されるゴム部材、並びに気体又は液体のDME及び気体又は液体のプロパンと接触する装置に使用されるゴム部材を提供することを目的とする。 The present invention has been made in view of the above problems, it is used in a device in contact with the gas body or rubber member used in the apparatus in contact with DME liquids, and gas or propane DME and gas or liquid in the liquid It is an object to provide a rubber member.
上記問題点を解決するため、本発明によるゴム部材は、アクリロニトリル量28〜38重量%のニトリル系ゴムとムーニー粘度(ML1+8 125℃)が41以上のハロゲン化ブチルゴムとの混合物であり、前記ゴム成分は硫黄加硫されていることを特徴とし、気体又は液体のジメチルエーテルと接触する装置に使用されるものである。このゴム部材は、気体又は液体のジメチルエーテルと接触する装置に使用されるのに適している。中でも、気体又は液体のジメチルエーテル及び気体又は液体のプロパンと接触する装置に使用されるのに特に適している。 To solve the above problems, by the present invention Lugo arm member, a mixture of acrylonitrile amount 28 to 38 wt% of nitrile rubber and a Mooney viscosity (ML 1 + 8 125 ℃) is 41 or more halogenated butyl rubber The rubber component is sulfur vulcanized and is used in an apparatus that comes into contact with gas or liquid dimethyl ether. This rubber member is suitable for use in an apparatus that comes into contact with gaseous or liquid dimethyl ether. Among others, it is particularly suitable for use in devices that come into contact with gaseous or liquid dimethyl ether and gaseous or liquid propane.
NBRは耐LPG性に優れるが耐DME性に劣り、逆にハロゲン化ブチルは耐DME性に優れるが耐LPG性に劣ることを見出したので、アクリロニトリル量28〜38重量%のNBRとムーニー粘度(ML1+8 125℃)が41以上のハロゲン化ブチルゴムとのブレンドをベースゴムとすることにより、気体又は液体のDMEと接触する装置に使用されるゴム部材、並びに気体又は液体のDME及び気体又は液体のプロパンと接触する装置に使用されるゴム部材を提供するものである。 NBR is excellent in LPG resistance but inferior in DME resistance. Conversely, butyl halide is inferior in DME resistance but inferior in LPG resistance. Therefore, NBR having an acrylonitrile amount of 28 to 38% by weight and Mooney viscosity ( by ML 1 + 8 125 ℃) it is based rubber blends of 41 or more halogenated butyl rubber, a rubber member used in the apparatus in contact with DME vapor, or liquid, and gas or DME and gas or liquid in the liquid The rubber member used for the apparatus which contacts propane of this invention is provided.
本発明によれば、気体又は液体のDMEと接触する装置に使用されるゴム部材、並びに気体又は液体のDME及び気体又は液体のプロパンと接触する装置に使用されるゴム部材を提供できる。 The present invention can provide a rubber member used in the apparatus in contact with the gas body or rubber member used in the apparatus in contact with DME liquids, and gas or propane DME and gas or liquid in the liquid.
本発明によれば、前述のようにニトリル系ゴムにハロゲン化ブチルゴムを配合したことを特徴とする。 According to the present invention, as described above, the halogenated butyl rubber is blended with the nitrile rubber.
ゴム材料としては、NBRとハロゲン化ブチルのブレンドであり、DME・LPG両用として使えるものである。このような本発明で使用されるNBRのアクリロニトリル量は、好ましくは28〜38重量%、最も好ましくは31〜35重量%である。38重量%を超える極高ニトリル・高ニトリルではブレンド性が悪くなり、一方28重量%未満の中ニトリル・低ニトリルでは耐油性が悪くなりLPG・DME両用として使うにはふさわしくないからである。このNBRとしては、水添加NBR(HNBR)であってもよい。 The rubber material is a blend of NBR and butyl halide and can be used for both DME and LPG. The amount of acrylonitrile of NBR used in the present invention is preferably 28 to 38% by weight, and most preferably 31 to 35% by weight. This is because extremely high nitriles / high nitriles exceeding 38% by weight result in poor blendability, while medium nitriles / low nitriles of less than 28% by weight have poor oil resistance and are not suitable for use as both LPG / DME. This NBR may be water-added NBR (HNBR).
一方、前述のようなNBRにブレンドされるハロゲン化ブチルゴムとしては、たとえば臭素化ブチルゴム、塩素化ブチルゴムを挙げることができる。ハロゲン化ブチルゴムとしては、好ましくは、ムーニー粘度(ML1+8 125℃)は41以上であるのがよい。ムーニー粘度が41未満であると、ブレンド性が悪化するからである。 On the other hand, examples of the halogenated butyl rubber blended with NBR as described above include brominated butyl rubber and chlorinated butyl rubber. As the halogenated butyl rubber, the Mooney viscosity (ML 1 + 8 125 ° C.) is preferably 41 or more. This is because the blendability deteriorates when the Mooney viscosity is less than 41.
このようなNBRゴムとハロゲン化ブチルゴムの配合比(重量比)は25:75〜75:25であるのがよい。NBRが25重量部未満であると、後述の実施例より明らかなように耐LPG性に問題を生じる恐れがあり、一方、ハロゲン化ブチルゴムが25重量%未満であると、耐DME性の劣る恐れを生じるからである。 The blending ratio (weight ratio) of such NBR rubber and halogenated butyl rubber is preferably 25:75 to 75:25. If the NBR is less than 25 parts by weight, there is a risk of causing problems in LPG resistance, as will be apparent from the examples described later. On the other hand, if the halogenated butyl rubber is less than 25% by weight, the DME resistance may be poor. It is because it produces.
アクリロニトリル量33重量%の中高ニトリルのNBRと臭素化ブチルゴム(ムーニー粘度(ML1+8 125℃);41〜49)のブレンド量を変化させて、耐LPG性および耐DEM性を測定した(表1)。比較例として、表1に示すような組成のアクリルゴム、ヒドリンゴム、ブチルゴム、水添加NBR、クロロプレンゴム、ウレタンゴムを同様な試験を行った。 LPG resistance and DEM resistance were measured by changing the blend amount of medium and high nitrile NBR and brominated butyl rubber (Mooney viscosity (ML 1 + 8 125 ° C.): 41 to 49) of 33% by weight of acrylonitrile (Table 1). . As comparative examples, acrylic rubber, hydrin rubber, butyl rubber, water-added NBR, chloroprene rubber, and urethane rubber having the compositions shown in Table 1 were subjected to the same test.
後述の表1の組成のゴム組成物を160℃、10分間加硫して、試験片を製造し、前記試験片をDMEガス、LPG/DMEガス中に40℃、24時間浸漬し、取り出した後、デシケータ中で12分間放置した後、デシケータから取りだし、ΔTB、ΔEB、ΔHs、ΔVを10分以内に測定した。さらに、60分後、再度ΔVを測定した。結果を下記の表1に示す。 A rubber composition having the composition shown in Table 1 described below was vulcanized at 160 ° C. for 10 minutes to produce a test piece. The test piece was immersed in DME gas and LPG / DME gas at 40 ° C. for 24 hours and taken out. Then, after leaving it in a desiccator for 12 minutes, it was taken out from the desiccator and ΔTB, ΔEB, ΔHs, and ΔV were measured within 10 minutes. Furthermore, ΔV was measured again after 60 minutes. The results are shown in Table 1 below.
判断基準は、表1の右欄に示している。表中、比A、比BはNBR単独、臭素化ブチルゴム単独の場合を示している。これらの表から明らかなように、NBR単独の場合、耐DME性に問題があり、一方臭素化ブチルゴムの場合には、耐LPG性に問題を生じる恐がある。また、他のゴムにおいては耐DME性あるいは耐LPG性のいずれか、あるいはその両方に問題を生じる恐れがあることが明らかになった。 Judgment criteria are shown in the right column of Table 1. In the table, the ratio A and the ratio B indicate the cases of NBR alone and brominated butyl rubber alone. As is clear from these tables, NBR alone has a problem with DME resistance, while brominated butyl rubber has a problem with LPG resistance. It has also been found that other rubbers may cause problems with either DME resistance or LPG resistance, or both.
これに対し、本発明によるNBRゴムとハロゲン化ブチルゴムのブレンドでは、DME、LPG/DMEガス浸漬による膨潤は小さく、良好な耐DME性および耐LPG性があることが明らかになった。 On the other hand, in the blend of NBR rubber and halogenated butyl rubber according to the present invention, swelling due to DME and LPG / DME gas immersion was small, and it was revealed that there was good DME resistance and LPG resistance.
以上のように本発明によれば、気体又は液体のDMEと接触する装置に使用されるゴム部材、並びに気体又は液体のDME及び気体又は液体のプロパンと接触する装置に使用されるゴム部材を提供可能であり、DMEあるいはLPGに接触するゴム部品、たとえばシール材として良好に使用可能になる。 Above as by the present invention lever, rubber member used in the apparatus in contact with DME gas or liquid, and a rubber member used in the apparatus in contact with DME and gas or propane liquid gas or liquid It can be provided and can be used favorably as a rubber part that comes into contact with DME or LPG, for example, a sealing material.
Claims (2)
前記ゴム成分はアクリロニトリル量28〜38重量%のニトリル系ゴムとムーニー粘度(ML1+8 125℃)が41以上のハロゲン化ブチルゴムとの混合物であり、
前記ゴム成分は硫黄加硫されている、
ことを特徴とする気体又は液体のジメチルエーテルと接触する装置に使用されるゴム部材。 Contains rubber components,
The rubber component is a mixture of a nitrile rubber having an acrylonitrile amount of 28 to 38% by weight and a halogenated butyl rubber having a Mooney viscosity (ML 1 + 8 125 ° C.) of 41 or more,
The rubber component is sulfur vulcanized,
The rubber member used for the apparatus which contacts the gaseous or liquid dimethyl ether characterized by the above-mentioned.
ことを特徴とする請求項1に記載のゴム部材。 Used in devices that come into contact with gaseous or liquid dimethyl ether and gaseous or liquid propane,
The rubber member according to claim 1 .
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JP2004235179A JP4531483B2 (en) | 2004-08-12 | 2004-08-12 | Rubber member |
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JP2004235179A JP4531483B2 (en) | 2004-08-12 | 2004-08-12 | Rubber member |
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JP2006052327A JP2006052327A (en) | 2006-02-23 |
JP4531483B2 true JP4531483B2 (en) | 2010-08-25 |
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JP2004235179A Active JP4531483B2 (en) | 2004-08-12 | 2004-08-12 | Rubber member |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2919613B1 (en) | 2007-07-30 | 2009-10-09 | Inergy Automotive Systems Res | OBJECT BASED ON A COMPOSITION CONTAINING A RETICLE MIXTURE OF ELASTOMERS |
JP5244469B2 (en) * | 2008-06-13 | 2013-07-24 | 藤倉ゴム工業株式会社 | Method for imparting DME resistance to rubber components |
JP2020533461A (en) * | 2017-09-12 | 2020-11-19 | アランセオ・ドイチュランド・ゲーエムベーハー | Copolymer vulcanized product for use in contact with oxymethylene ether-containing media |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5839436A (en) * | 1981-09-03 | 1983-03-08 | Showa Gomme Kk | Rubber plug |
JPH0317138A (en) * | 1989-04-24 | 1991-01-25 | Goodyear Tire & Rubber Co:The | Pneumatic tire with air holding inner liner |
JP2002533525A (en) * | 1998-12-18 | 2002-10-08 | バルワー エス.アー. | Gasket for valve or pump |
JP2004155906A (en) * | 2002-11-06 | 2004-06-03 | Nichias Corp | Dimethyl ether-resistant rubber composition and rubber member |
JP2004292738A (en) * | 2003-03-28 | 2004-10-21 | Nichias Corp | Dimethyl ether resistant rubber composition and rubber member |
JP2007514022A (en) * | 2003-12-12 | 2007-05-31 | ランクセス・インク. | Butyl rubber composition for tire tread |
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2004
- 2004-08-12 JP JP2004235179A patent/JP4531483B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5839436A (en) * | 1981-09-03 | 1983-03-08 | Showa Gomme Kk | Rubber plug |
JPH0317138A (en) * | 1989-04-24 | 1991-01-25 | Goodyear Tire & Rubber Co:The | Pneumatic tire with air holding inner liner |
JP2002533525A (en) * | 1998-12-18 | 2002-10-08 | バルワー エス.アー. | Gasket for valve or pump |
JP2004155906A (en) * | 2002-11-06 | 2004-06-03 | Nichias Corp | Dimethyl ether-resistant rubber composition and rubber member |
JP2004292738A (en) * | 2003-03-28 | 2004-10-21 | Nichias Corp | Dimethyl ether resistant rubber composition and rubber member |
JP2007514022A (en) * | 2003-12-12 | 2007-05-31 | ランクセス・インク. | Butyl rubber composition for tire tread |
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