JPH0820019B2 - Oil seal for flame retardant hydraulic oil - Google Patents
Oil seal for flame retardant hydraulic oilInfo
- Publication number
- JPH0820019B2 JPH0820019B2 JP62271395A JP27139587A JPH0820019B2 JP H0820019 B2 JPH0820019 B2 JP H0820019B2 JP 62271395 A JP62271395 A JP 62271395A JP 27139587 A JP27139587 A JP 27139587A JP H0820019 B2 JPH0820019 B2 JP H0820019B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic oil
- parts
- nitrile rubber
- oil
- weight
- 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
Links
- 239000010720 hydraulic oil Substances 0.000 title claims description 28
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims description 16
- 239000003063 flame retardant Substances 0.000 title claims description 16
- 239000003921 oil Substances 0.000 title claims description 12
- 229920000459 Nitrile rubber Polymers 0.000 claims description 27
- 239000000395 magnesium oxide Substances 0.000 claims description 18
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 18
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 18
- 229920001971 elastomer Polymers 0.000 claims description 16
- 239000005060 rubber Substances 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 5
- 229910052740 iodine Inorganic materials 0.000 claims description 5
- 239000011630 iodine Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 150000002978 peroxides Chemical class 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000013329 compounding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- -1 aromatic secondary amine Chemical class 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- WRXCBRHBHGNNQA-UHFFFAOYSA-N (2,4-dichlorobenzoyl) 2,4-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1Cl WRXCBRHBHGNNQA-UHFFFAOYSA-N 0.000 description 1
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- PNJLSKTVCRNRBO-UHFFFAOYSA-N 1-tert-butylperoxy-2,5-dimethylhexane Chemical compound CC(C)CCC(C)COOC(C)(C)C PNJLSKTVCRNRBO-UHFFFAOYSA-N 0.000 description 1
- CWJHMZONBMHMEI-UHFFFAOYSA-N 1-tert-butylperoxy-3-propan-2-ylbenzene Chemical compound CC(C)C1=CC=CC(OOC(C)(C)C)=C1 CWJHMZONBMHMEI-UHFFFAOYSA-N 0.000 description 1
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-N hexanedioic acid Natural products OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 1
- DMDGGSIALPNSEE-UHFFFAOYSA-N hydroflumethiazide Chemical compound C1=C(C(F)(F)F)C(S(=O)(=O)N)=CC2=C1NCNS2(=O)=O DMDGGSIALPNSEE-UHFFFAOYSA-N 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010060 peroxide vulcanization Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、難燃性作動油用オイルシールに関する。更
に詳しくは、ニトリルゴム配合物または水素添加ニトリ
ルゴム配合物の加硫物をゴム材料に用いてなる難燃性作
動油用オイルシールに関する。The present invention relates to an oil seal for flame-retardant hydraulic oil. More specifically, it relates to an oil seal for a flame-retardant hydraulic oil, which is obtained by using a vulcanized product of a nitrile rubber compound or a hydrogenated nitrile rubber compound as a rubber material.
油圧ポンプなどに使用されている作動油は、従来石油
系作動油が主であったが、油圧ポンプなどが室内で使用
されるケースが多くなるにつれて、ポンプ作動中および
取扱い中に作動油が漏れて床にこぼれたり、安全性確保
のために石油系作動油の使用が嫌われるようになってき
つつある。このため、床にこぼれてもすぐに処置し易い
難燃性の作動油、特にそれの含水タイプに変更されて用
いられるようになってきている。Conventionally, the hydraulic oil used for hydraulic pumps was mainly petroleum-based hydraulic oil, but as hydraulic pumps are used indoors in many cases, the hydraulic oil leaks during pump operation and handling. The use of petroleum-based hydraulic oil for safety reasons is becoming increasingly disliked. For this reason, the flame-retardant hydraulic oil, which is easy to treat even if it spills on the floor, has been changed to a water-containing hydraulic oil, and used.
しかしながら、難燃性作動油は、強度、耐水性、耐摩
耗性要求の観点からオイルシール用ゴム材料として主に
使用されているニトリルゴムや水素添加ニトリルゴムを
軟化させ、シール機能を損わせることが判明した。即
ち、難燃性作動油によりこれらのゴム材料が膨潤、軟化
し、ゴム弾性が失われる結果、オイルシールの緊迫力、
摩耗性がなくなり、作動油を封じることができなくなる
のである。However, flame-retardant hydraulic oil softens nitrile rubber and hydrogenated nitrile rubber, which are mainly used as rubber materials for oil seals from the viewpoint of strength, water resistance and wear resistance, and impairs the sealing function. It has been found. That is, these rubber materials are swollen and softened by the flame-retardant hydraulic oil, resulting in loss of rubber elasticity.
The wear is lost and the hydraulic oil cannot be sealed.
本発明者は、オイルシール用ゴム材料として用いられ
るニトリルゴムまたは水素添加ニトリルゴムの加硫物の
改質を試み、難燃性作動油に対して耐性のあるものの開
発を図った。The present inventor has attempted to modify a vulcanized product of nitrile rubber or hydrogenated nitrile rubber used as a rubber material for oil seals, and has attempted to develop a vulcanized product having resistance to a flame-retardant hydraulic oil.
一般に用いられているニトリルゴムまたは水素添加ニ
トリルゴムは、イオウ加硫およびゴムの耐熱性向上のた
めに酸化亜鉛を配合している。しかしながら、シール対
象液である難燃性作動油中には、脂肪酸などの潤滑性能
向上のための摩耗調整剤が含まれており、これが酸化亜
鉛と反応し、ゴムを著しく劣化（軟化）させることが知
られている。Generally used nitrile rubber or hydrogenated nitrile rubber is blended with zinc oxide for sulfur vulcanization and for improving the heat resistance of the rubber. However, the flame-retardant hydraulic oil that is the liquid to be sealed contains a wear modifier such as a fatty acid for improving the lubrication performance, which reacts with zinc oxide and significantly deteriorates (softens) the rubber. It has been known.
そこで、本発明者は加硫系を酸化亜鉛を必要とはしな
いパーオキサイド系に変更すると共に、難燃性作動油中
に含まれる水分と反応しかつ活性度の低い酸化マグネシ
ウムをそこに配合することにより、ゴムの軟化を抑制す
ることに成功した。Therefore, the present inventor changes the vulcanization system to a peroxide system that does not require zinc oxide, and mixes therein magnesium oxide that reacts with water contained in the flame-retardant hydraulic oil and has low activity. This successfully suppressed the softening of the rubber.
従って、本発明は難燃性作動油用オイルシールに係
り、この難燃性作動油用オイルシールは、２価金属酸化
物としてヨード吸着量が約30〜60mg/gの酸化マグネシウ
ムを含有するニトリルゴム配合物または水素添加ニトリ
ルゴム配合物のパーオキサイド加硫物をゴム材料に用い
てなる。Therefore, the present invention relates to an oil seal for a flame-retardant hydraulic oil, and the oil seal for a flame-retardant hydraulic oil is a nitrile containing magnesium oxide having an iodine adsorption amount of about 30 to 60 mg / g as a divalent metal oxide. The rubber compound is a peroxide vulcanizate of a rubber compound or a hydrogenated nitrile rubber compound.
ニトリルゴム配合物または水素化ニトリルゴム配合物
についてパーオキサイド加硫を行ない、その際酸化マグ
ネシウムを用いること、酸化マグネシウムを配合する場
合には低イオウ系または無イオウ系の加硫系が好ましい
ことは既に公知であるが、このような加硫系で用いられ
る酸化マグネシウムなどの金属酸化物は、ゴムの耐熱性
を向上させる目的で活性度の高いもの、例えばヨード吸
着量として約150mg/g程度の酸化マグネシウムが用いら
れる。Peroxide vulcanization of a nitrile rubber compound or a hydrogenated nitrile rubber compound is performed, and magnesium oxide is used at that time, and when a magnesium oxide is compounded, a low sulfur type or non-sulfur type vulcanizing system is preferable. Although already known, metal oxides such as magnesium oxide used in such a vulcanization system have high activity for the purpose of improving the heat resistance of rubber, for example, an iodine adsorption amount of about 150 mg / g. Magnesium oxide is used.
これに対して、本発明では難燃性作動油中に含まれる
水分と反応させ、ゴムを硬化させる目的で酸化マグネシ
ウムが用いられており、従って粒子径が大きく活性度の
低いもの、即ちヨード吸着量として約30〜30mg/gのもの
が使用される。On the other hand, in the present invention, magnesium oxide is used for the purpose of curing the rubber by reacting with water contained in the flame-retardant hydraulic oil, and therefore, the one having a large particle size and low activity, that is, iodine adsorption. The amount used is about 30 to 30 mg / g.
かかる酸化マグネシウムは、ニトリルゴムまたは水素
化ニトリルゴム（水素化率約90〜100％）100重量部当り
約0.3〜５重量部、好ましくは約0.5〜３重量部の割合で
用いられる。これ以上の割合で酸化マグネシウムが用い
られると、長期にわたる使用に対してゴム材料が硬化
し、リップの弾性低下などにより、オイルシール用ゴム
材料として不適当となる。Such magnesium oxide is used in an amount of about 0.3 to 5 parts by weight, preferably about 0.5 to 3 parts by weight, per 100 parts by weight of nitrile rubber or hydrogenated nitrile rubber (hydrogenation rate of about 90 to 100%). When magnesium oxide is used in a proportion higher than this, the rubber material is hardened over a long period of use, and it becomes unsuitable as a rubber material for an oil seal due to a decrease in elasticity of the lip.
（水素添加）ニトリルゴム配合物中には、酸化マグネ
シウム以外に、一般に次のような各成分が（水素添加）
ニトリルゴム100重量部当り次のような配合量で配合し
て用いられる。(Hydrogenated) In addition to magnesium oxide, the following components are generally (hydrogenated) in nitrile rubber compounds.
It is used by blending in the following amounts per 100 parts by weight of nitrile rubber.
（１）補強性充填剤 カーボンブラックまたはSiO2を主成分とするホワイト
カーボンなどが約５〜100重量部、好ましくは約20〜80
重量部用いられる。(1) Reinforcing filler Carbon black or white carbon containing SiO 2 as a main component is about 5 to 100 parts by weight, preferably about 20 to 80 parts by weight.
Used in parts by weight.
（２）充填剤 増量または摩耗性向上のために、セライト、グラファ
イト、マイカ、タルク、テトラフルオロエチレン樹脂粉
末などが約５〜100重量部、好ましくは約10〜70重量部
用いられる。(2) Filler About 5 to 100 parts by weight, preferably about 10 to 70 parts by weight of celite, graphite, mica, talc, tetrafluoroethylene resin powder and the like are used for increasing the amount or improving the wear resistance.
（３）老化防止剤 アミン−ケトン系、芳香族第２級アミン系、ベンツイ
ミダゾール系、ジチオカルバミン酸塩系、特殊ワックス
などが約0.5〜15重量部、好ましくは約２〜10重量部用
いられる。(3) Anti-aging agent About 0.5 to 15 parts by weight, preferably about 2 to 10 parts by weight of amine-ketone type, aromatic secondary amine type, benzimidazole type, dithiocarbamate type and special wax are used.
（４）可塑剤 ジオクチルフタレート、ジオクチルセバケート、ジブ
チルメチレンビスチオグリコレート、アジピン酸エステ
ルなどが約１〜30重量部、好ましくは約５〜20重量部用
いられる。(4) Plasticizer Dioctyl phthalate, dioctyl sebacate, dibutylmethylene bisthioglycolate, adipic acid ester and the like are used in an amount of about 1 to 30 parts by weight, preferably about 5 to 20 parts by weight.
（５）助剤 加工性を改良するためにステアリン酸、ポリブタジエ
ンなどが、また加硫を促進したり、制御したりするため
にトリアリルイソシアヌレートなどが約0.1〜10重量部
用いられる。(5) Auxiliaries Stearic acid, polybutadiene and the like are used to improve processability, and triallyl isocyanurate and the like are used in an amount of about 0.1 to 10 parts by weight to accelerate and control vulcanization.
（６）有機過酸化物 ベンゾイルパーオキサイド、2,4−ジクロルベンゾイ
ルパーオキサイド、ジクミルパーオキサイド、ビス（第
３ブチルパーオキシ−ｍ−イソプロピル）ベンゼン、2,
5−ビス（第３ブチルパーオキシ）−2,5−ジメチルヘキ
サンなどが約0.1〜15重量部用いられる。(6) Organic peroxide benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, dicumyl peroxide, bis (tertiary butylperoxy-m-isopropyl) benzene, 2,
About 0.1 to 15 parts by weight of 5-bis (tertiary butylperoxy) -2,5-dimethylhexane is used.
以上の各成分からなる配合物の調製および加硫は、次
のようにして行われる。まず、配合物の調製は、ASTM D
−1485に従って（水素添加）ニトリルゴム、可塑剤およ
び加硫剤以外の配合剤、可塑剤および加硫剤の順序で採
取して配合した後、MSTM D−3182に準じてオープンロー
ルで混練することによって行われ、また加硫は、（水素
添加）ニトリルゴムに通常適用される加硫条件がそのま
ま用いられる。Preparation and vulcanization of the above-mentioned components are performed as follows. First, the preparation of the compound
-1485 (hydrogenated) Nitrile rubber, compounding agent other than plasticizer and vulcanizing agent, plasticizer and vulcanizing agent are sampled and compounded in this order, and then kneaded by open roll according to MSTM D-3182. And the vulcanization is carried out using the vulcanization conditions normally applied to (hydrogenated) nitrile rubbers.
〔作用〕および〔発明の効果〕 難燃性作動油としては、水−グリコール系作動油、乳
化系作動油、リン酸系作動油などが用いられており、こ
れらの難燃性作動油、特に水−グリコール系作動油中に
含まれる水によるニトリルゴムまたは水素添加ニトリル
ゴムの軟化、膨潤が、酸化マグネシウムの添加により効
果的に抑制されるので、このパーオキサイド加硫物のオ
イルシールのゴム材料として有効に使用することができ
る。[Operation] and [Effect of the invention] As the flame-retardant hydraulic oil, water-glycol hydraulic oil, emulsifying hydraulic oil, phosphoric acid hydraulic oil, etc. are used. The softening and swelling of nitrile rubber or hydrogenated nitrile rubber due to the water contained in the water-glycol hydraulic oil is effectively suppressed by the addition of magnesium oxide. Therefore, the rubber material for the oil seal of this peroxide vulcanizate Can be effectively used as.
〔実施例〕 次に、実施例について本発明の効果を説明する。[Examples] Next, effects of the present invention will be described with reference to Examples.
実施例１ ニトリルゴム（日本ゼオン製品Nipol DN206;ニトリル
含量33％）100部（重量、以下同じ）、HAFカーボンブラ
ック20部、ホワイトカーボン（湿式シリカ）25部、けい
そう土45部、老化防止剤（大内新興化学製品ノックラッ
ク224、同ノックラックMB）３部、酸化マグネシウム
（ヨード吸着量40mg/g）１部、ジオクチルフタレート10
部、ステアリン酸１部およびジクミルパーオキサイド
（日本油脂製品パークミルＤ−40）６部を、ASTM D−14
85に従って配合し、次いでASTM D−3182に準じてオープ
ンロールで混練した。Example 1 Nitrile rubber (Nippon Zeon product Nipol DN206; nitrile content 33%) 100 parts (weight, the same below), HAF carbon black 20 parts, white carbon (wet silica) 25 parts, diatomaceous earth 45 parts, anti-aging agent (Ouchi new chemical product Nocklac 224, Nokklac MB) 3 parts, magnesium oxide (iodine adsorption amount 40 mg / g) 1 part, dioctyl phthalate 10
Part, stearic acid 1 part and dicumyl peroxide (NOF Products Perkmill D-40) 6 parts, ASTM D-14
Formulated according to 85 and then kneaded on an open roll according to ASTM D-3182.
この混練物を、170℃で15分間の加硫を行ない、JIS K
−6301に準ずる方法により常態値を測定し、また難燃性
作動油（松村石油製品ハイドールHAW）中への浸漬を80
℃で168時間行なったときの常態値変化率および体積変
化率をそれぞれ測定した。This kneaded product was vulcanized at 170 ° C for 15 minutes, and then JIS K
Normal value is measured by a method according to −6301, and immersion in flame-retardant hydraulic oil (Matsumura Petroleum Product Hydol HAW) is recommended.
The rate of change in the normal state value and the rate of change in the volume when measured at ℃ for 168 hours were measured.
実施例２ 実施例１において、ニトリルゴムの代りに同量の水素
添加ニトリルゴム（日本ゼオン製品Zetpol 2020;ニトリ
ル含量36％）を用い、同様の加硫および測定を行なっ
た。Example 2 In Example 1, the same amount of hydrogenated nitrile rubber (Zetpol 2020 manufactured by Nippon Zeon Co .; nitrile content 36%) was used instead of the nitrile rubber, and the same vulcanization and measurement were performed.
比較例１ 実施例１において、酸化マグネシウムの代りに10部の
酸化亜鉛を用い、またジクミルパーオキサイドの代りに
0.8部のイオウを用いて、同様の加硫および測定を行な
った。Comparative Example 1 In Example 1, 10 parts of zinc oxide was used instead of magnesium oxide, and dicumyl peroxide was used instead of dicumyl peroxide.
Similar vulcanization and measurements were performed using 0.8 part of sulfur.
比較例２ 実施例２において、酸化マグネシウムの配合量を10部
に変更し、同様の加硫および測定を行なった。Comparative Example 2 In Example 2, the compounding amount of magnesium oxide was changed to 10 parts, and the same vulcanization and measurement were performed.
以上の各実施例および比較例における測定結果は、次
の表１に示される。The measurement results in each of the above Examples and Comparative Examples are shown in Table 1 below.
実施例３ 実施例２の浸漬試験において、酸化マグネシウムの配
合量１部を種々に変更したときの配合量と硬さ変化との
関係（第１図）ならびに酸化マグネシウム各配合量にお
ける浸漬時間と硬さ変化との関係（第２図）をそれぞれ
測定した。 Example 3 In the immersion test of Example 2, the relationship between the compounding amount and the hardness change when variously changing 1 part of the magnesium oxide compounding amount (FIG. 1), and the immersion time and the hardness at each magnesium oxide compounding amount The relationship with the change in temperature (Fig. 2) was measured.
実施例４ 実施例１および比較例１の配合物からオイルシールを
加硫成形し、JIS B−2402に準ずる方法により、機能評
価試験を次の条件下で行ない、得られた結果を下記表２
に示した。Example 4 An oil seal was vulcanized from the composition of Example 1 and Comparative Example 1, and a functional evaluation test was performed under the following conditions by a method according to JIS B-2402. The results obtained are shown in Table 2 below.
It was shown to.
作動油：水−グリコール系作動油（ハイドールHAW） 液温:50℃ 試験時間:500時間 油圧：−0.3〜0.3Kgf/cm2 回転数:1800rpm 表２測定項目 実施例１ 比較例１ 洩 れ なし 200時間で洩れ 硬さ変化（ポイント） −１ −15 主リップ摩耗幅（mm） 0.4 1.2Hydraulic oil: Water-glycol hydraulic oil (Hydall HAW) Liquid temperature: 50 ° C Test time: 500 hours Hydraulic pressure: -0.3 to 0.3 Kgf / cm 2 Rotation speed: 1800 rpm Table 2 Measurement items Example 1 Comparative example 1 No leakage Leakage in 200 hours Hardness change (points) −1−15 Main lip wear width (mm) 0.4 1.2
第１〜２図は、いずれも実施例３における測定結果を示
すグラフである。1 and 2 are graphs showing the measurement results in Example 3.
Claims (2)
60mg/gの酸化マグネシウムを含有するニトリルゴム配合
物または水素添加ニトリルゴム配合物のパーオキサイド
加硫物をゴム材料に用いてなる難燃性作動油用オイルシ
ール。1. A divalent metal oxide having an iodine adsorption amount of 30 to 30.
An oil seal for a flame-retardant hydraulic oil, which uses a peroxide vulcanizate of a nitrile rubber compound or a hydrogenated nitrile rubber compound containing 60 mg / g of magnesium oxide as a rubber material.
100重量部当り0.5〜５重量部の酸化マグネシウムが用い
られた特許請求の範囲第１項記載の難燃性作動油用オイ
ルシール。2. Nitrile rubber or hydrogenated nitrile rubber
The oil seal for flame-retardant hydraulic oil according to claim 1, wherein 0.5 to 5 parts by weight of magnesium oxide is used per 100 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62271395A JPH0820019B2 (en) | 1987-10-27 | 1987-10-27 | Oil seal for flame retardant hydraulic oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62271395A JPH0820019B2 (en) | 1987-10-27 | 1987-10-27 | Oil seal for flame retardant hydraulic oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01112083A JPH01112083A (en) | 1989-04-28 |
| JPH0820019B2 true JPH0820019B2 (en) | 1996-03-04 |
Family
ID=17499468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62271395A Expired - Lifetime JPH0820019B2 (en) | 1987-10-27 | 1987-10-27 | Oil seal for flame retardant hydraulic oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0820019B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0795580B1 (en) * | 1994-11-30 | 2001-03-21 | Nippon Zeon Co., Ltd. | Vulcanizable rubber composition, seal to be used in dynamic state, and material therefor |
| CN105949539B (en) * | 2016-05-16 | 2017-09-19 | 湖北洋田塑料制品有限公司 | A kind of oil resistant thermoplastic elastomer and preparation method thereof |
| CN111171409A (en) * | 2020-02-25 | 2020-05-19 | 广州机械科学研究院有限公司 | High-temperature-resistant, high-strength and high-expansion-rate rubber and preparation method thereof |
-
1987
- 1987-10-27 JP JP62271395A patent/JPH0820019B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01112083A (en) | 1989-04-28 |
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