JPH0674355B2 - Magnetic rubber manufacturing method - Google Patents
Magnetic rubber manufacturing methodInfo
- Publication number
- JPH0674355B2 JPH0674355B2 JP18459686A JP18459686A JPH0674355B2 JP H0674355 B2 JPH0674355 B2 JP H0674355B2 JP 18459686 A JP18459686 A JP 18459686A JP 18459686 A JP18459686 A JP 18459686A JP H0674355 B2 JPH0674355 B2 JP H0674355B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- base oil
- elastomer
- rubber
- dispersed
- 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
- 229920001971 elastomer Polymers 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000011553 magnetic fluid Substances 0.000 claims description 18
- 239000006247 magnetic powder Substances 0.000 claims description 15
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 5
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical class OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 4
- 125000005907 alkyl ester group Chemical group 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 4
- 150000002790 naphthalenes Chemical class 0.000 claims description 3
- 229920000636 poly(norbornene) polymer Polymers 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000009835 boiling Methods 0.000 description 24
- 239000002199 base oil Substances 0.000 description 21
- 239000000806 elastomer Substances 0.000 description 15
- 229910000859 α-Fe Inorganic materials 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000011882 ultra-fine particle Substances 0.000 description 8
- 239000004094 surface-active agent Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 239000002612 dispersion medium Substances 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- ZHGIKBCGOGBDFG-UHFFFAOYSA-N 1-icosylnaphthalene Chemical compound C1=CC=C2C(CCCCCCCCCCCCCCCCCCCC)=CC=CC2=C1 ZHGIKBCGOGBDFG-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 2
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QYWXVBFLPIGNNL-UHFFFAOYSA-L disodium butanedioate 1-octylsulfonyloctane Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O.CCCCCCCCS(=O)(=O)CCCCCCCC QYWXVBFLPIGNNL-UHFFFAOYSA-L 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- 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、磁性ゴムの製造法に関する。更に詳しくは、
磁性粉体を均一に分散せしめた磁性ゴムの製造法に関す
る。TECHNICAL FIELD The present invention relates to a method for producing a magnetic rubber. For more details,
The present invention relates to a method for producing magnetic rubber in which magnetic powder is uniformly dispersed.
エラストマー中に磁性粉体を混練させ、それを加硫成形
した磁性ゴム（ゴム磁石とも称する）は、各種の用途に
広く用いられているが、それの製造は、エラストマーに
直接磁性粉体を混ぜ、ロールなどを用いて混練している
ため、磁性粉体を均一に分散させることが困難であり、
その結果として均一な磁力を有するものが得られ難いと
いう欠点がみられた。Magnetic rubber (also called rubber magnet), which is obtained by kneading magnetic powder into an elastomer and vulcanizing it, is widely used for various purposes. To manufacture it, the magnetic powder is mixed directly with the elastomer. , It is difficult to uniformly disperse the magnetic powder because it is kneaded using a roll or the like,
As a result, there was a defect that it was difficult to obtain a magnet having a uniform magnetic force.
本発明者は、磁性粉体を均一に分散させた磁性ゴムを得
るべき種々検討を行ない、磁性粉体を磁性流体の形でエ
ラストマー中に伸展させることにより、かかる課題が解
決されることを見出した。そのためには、エラストマー
と磁性流体の分散媒とは、互いに相溶性のあるものが用
いられる。The present inventor has conducted various studies to obtain a magnetic rubber in which magnetic powder is uniformly dispersed, and found that such problems can be solved by extending the magnetic powder in the elastomer in the form of magnetic fluid. It was For that purpose, the elastomer and the dispersion medium of the magnetic fluid are compatible with each other.
従って、本発明は磁性ゴムの製造法に係り、磁性ゴムの
製造は、親油性エラストマーに該エラストマーと相溶性
を有する油中に磁性粉体を分散させた磁性流体を加硫配
合剤と共に配合した後、加硫成形することにより行われ
る。Therefore, the present invention relates to a method for producing a magnetic rubber. The production of the magnetic rubber is performed by mixing a lipophilic elastomer with a magnetic fluid in which magnetic powder is dispersed in an oil compatible with the elastomer together with a vulcanizing compounding agent. After that, it is vulcanized and molded.
親油性エラストマーとしては、磁性流体の好ましい分散
媒として用いられる高級アルキル置換ナフタリンまたは
ジカルボン酸ジ高級アルキルエステルとの相溶性を有す
るポリノルボルネンまたはエチレン−プロピレン（−ジ
エン）共重合ゴムが用いられる。As the lipophilic elastomer, polynorbornene or ethylene-propylene (-diene) copolymer rubber having compatibility with higher alkyl-substituted naphthalene or dicarboxylic acid di-higher alkyl ester used as a preferable dispersion medium for magnetic fluid is used.
上記の如く高級アルキル置換ナフタリンまたはジカルボ
ン酸ジ高級アルキルエステルを分散媒として、そこに磁
性粉体（フェライト類徴微粒子）を分散させた磁性流体
は、例えば次のようにして調製される。As described above, the magnetic fluid in which the higher alkyl-substituted naphthalene or the dicarboxylic acid di-higher alkyl ester is used as a dispersion medium and magnetic powder (ferrite characteristic fine particles) is dispersed therein is prepared, for example, as follows.
（１）強アルカリによる共沈法で得られたフェライト類
（マグネタイト、Mn−フェライト、Ni−フェライト、Mn
・Ni−フェライト、Ni・Zn−フェライトなど）の超微粒
子の水性けん濁液に、オレイン酸ナトリウム、ソジウム
ジオクチルスルホンサクシネート（商品名Aerosol O
T）などによって代表される各種の界面活性剤を加え、
これを例えば90℃、30分間加熱することにより、フェラ
イト類超微粒子に界面活性剤を吸着させ、この界面活性
剤吸着フェライト類超微粒子を減圧乾燥した後、エイコ
シルナフタリンによって代表される高級アルキル置換ナ
フタリン、セバシン酸ジオクチル、アジピン酸ジオクチ
ルによって代表されるジカルボン酸ジ高級アルキルエス
テルである沸点約150℃以上の高沸点基油中に、超音波
を照射しながら分散せしめ方法（従来法） （２）界面活性剤を吸着させたフェライト類超微粒子を
低沸点基油に一旦分散させた後、該低沸点基油と相溶性
を有する沸点約150℃以上の高沸点基油と混合し、超音
波を照射しながら低沸点基油を蒸発除去し、溶剤基油の
置換を行なう方法 （特開昭63−3099号公報） （３）界面活性剤を吸着させたフェライト類超微粒子の
低沸点基油分散物を、該低沸点基油と相溶性を有しかつ
約150℃以上に加熱された高沸点基油中へ滴下すること
により低沸点基油を蒸発させ、溶剤基油の置換を行なう
方法 （特開昭63−8488号公報） 上記（２）および（３）の方法では、界面活性剤を吸着
させたフェライト類超微粒子として、従来公知のものが
乾燥した上でそのまま用いられ、これを低沸点基油、好
ましくはシクロヘキサン、トルエンなどの沸点が約30〜
110℃の炭化水素溶剤中に一旦分散させる。ここでは、
一般に超微粒子濃度が約0.1〜1.3g/mlになるように低沸
点基油が用いられる。これ以上の濃度に調製されると、
フェライト類超微粒子はゲル化してしまい、磁性流体を
もはや形成しない。(1) Ferrites obtained by coprecipitation method with strong alkali (magnetite, Mn-ferrite, Ni-ferrite, Mn
・ Ni-Ferrite, Ni ・ Zn-Ferrite, etc. ultrafine particles in an aqueous suspension, sodium oleate, sodium dioctyl sulfone succinate (trade name Aerosol O
T) and other various surfactants are added,
By heating this, for example, at 90 ° C. for 30 minutes, the surfactant is adsorbed on the ferrite ultrafine particles, and after drying the surfactant-adsorbed ferrite ultrafine particles under reduced pressure, a higher alkyl substitution represented by eicosylnaphthalene. Dispersion method using ultrasonic waves in a high boiling point base oil having a boiling point of about 150 ° C or higher, which is a dicarboxylic acid higher alkyl ester represented by naphthalene, dioctyl sebacate, and dioctyl adipate (conventional method) (2) Ultrafine ferrite particles adsorbing a surfactant are once dispersed in a low-boiling base oil, and then mixed with a high-boiling base oil having a boiling point of about 150 ° C. or higher, which is compatible with the low-boiling base oil, and ultrasonic waves are applied. Method of replacing solvent base oil by removing low boiling base oil by evaporation while irradiating (JP-A-63-3099) (3) Ultrafine ferrites adsorbing surfactant A low-boiling base oil dispersion of particles is added to a high-boiling base oil that is compatible with the low-boiling base oil and is heated to about 150 ° C. or higher to evaporate the low-boiling base oil, and a solvent base. Method for substituting oil (Japanese Patent Laid-Open No. 63-8488) In the methods (2) and (3), as the ferrite ultrafine particles having a surfactant adsorbed thereon, conventionally known ultrafine particles are dried. Used as is, it has a low boiling point base oil, preferably cyclohexane, toluene, etc.
Disperse once in a hydrocarbon solvent at 110 ° C. here,
Generally, a low boiling base oil is used so that the ultrafine particle concentration is about 0.1 to 1.3 g / ml. When it is adjusted to a higher concentration,
The ultrafine ferrite particles have gelled and no longer form a magnetic fluid.
次いで、上記（２）の方法では、この低沸点基油分散磁
性流体を、求められる磁性流体の超微粒子濃度に応じた
量の、低沸点基油と相溶性を有する高沸点基油と混合
し、超音波を照射しながら低沸点基油を一般に約10〜30
0mmHgの減圧条件下で蒸発除去すると、溶剤基油の置換
によって高沸点基油分散磁性流体が得られる。Next, in the above method (2), the low-boiling base oil-dispersed magnetic fluid is mixed with an amount of a high-boiling base oil compatible with the low-boiling base oil in an amount corresponding to the ultrafine particle concentration of the magnetic fluid required. , While irradiating ultrasonic waves, the low boiling point base oil is generally about 10 ~ 30
When evaporated and removed under a reduced pressure of 0 mmHg, a high-boiling base oil-dispersed magnetic fluid is obtained by replacing the solvent base oil.
また、上記（３）の方法では、低沸点基油分散磁性流体
を、求められる磁性流体の超微粒子濃度に応じた量の、
低沸点基油と相溶性を有する高沸点基油であって、約15
0℃以上に加熱されたもの、例えば270℃に加熱されたエ
イコシルナフタリン、200℃に加熱されたセバシン酸ジ
オクチル、180℃に加熱されたアジピン酸ジオクチル中
などへ滴下すると、この加熱温度よりかなり低い沸点を
有する低沸点基油は滴下と同時に蒸発除去され、かかる
溶剤基油の置換によって高沸点基油分散磁性流体が得ら
れる。In the method (3), the low-boiling base oil-dispersed magnetic fluid is added in an amount corresponding to the required ultrafine particle concentration of the magnetic fluid.
A high boiling base oil that is compatible with low boiling base oils,
When heated to 0 ° C or higher, such as eicosylnaphthalene heated to 270 ° C, dioctyl sebacate heated to 200 ° C, dioctyl adipate heated to 180 ° C, etc., the temperature is considerably higher than this heating temperature. The low boiling point base oil having a low boiling point is removed by evaporation at the same time as the dropping, and the high boiling point base oil dispersed magnetic fluid is obtained by replacing the solvent base oil.
このようにして調製される磁性流体は、親油性エラスト
マー100重量部当り約500〜2500重量部の割合で用いられ
る。これより少ない使用割合では、ゴムに十分な磁性を
付与するのに必要な磁性粉体が分散されないことにな
り、一方これより多い割合で用いられると、磁性流体の
すべてを親油性エラストマー中に伸展することが困難と
なる。The magnetic fluid thus prepared is used in a proportion of about 500 to 2500 parts by weight per 100 parts by weight of the lipophilic elastomer. If the amount used is less than this, the magnetic powder required to impart sufficient magnetism to the rubber will not be dispersed, while if used in excess of this, all of the magnetic fluid will be spread into the lipophilic elastomer. Will be difficult to do.
親油性エラストマーと磁性流体とは、これを一旦ロール
などで練った後、エラストマー用の各種加硫剤を配合
し、混練してから、エラストマーの加硫条件下で加硫成
形する。The lipophilic elastomer and the magnetic fluid are once kneaded with a roll or the like, then mixed with various vulcanizing agents for the elastomer, kneaded, and then vulcanized and molded under the vulcanizing conditions of the elastomer.
本発明方法によれば、エラストマー中に磁性粉体を直接
混練させるのではなく、磁性粉体をエラストマーと相溶
性のある油を分散媒として磁性流体化し、それをエラス
トマーに伸展させてから加硫成形しているので、磁性粉
体は磁性ゴム中に均一に分散し、この良好な分散性が均
一な磁力を有する磁性ゴムを得ることを容易にしてい
る。According to the method of the present invention, instead of directly kneading the magnetic powder into the elastomer, the magnetic powder is made into a magnetic fluid using an oil compatible with the elastomer as a dispersion medium, and the magnetic powder is extended to the elastomer and then vulcanized. Since it is molded, the magnetic powder is uniformly dispersed in the magnetic rubber, and the good dispersibility makes it easy to obtain the magnetic rubber having a uniform magnetic force.
次に、実施例について本発明を説明する。 Next, the present invention will be described with reference to examples.
実施例 ポリノルボルネン粉末（日本ゼオン製品ノーソレック
ス）100部（重量、以下同じ）および磁性流体（バリウ
ムフェライトをエイコシルナフタリン中に、界面活性剤
を用い、60重量％の濃度で分散させたもの）500部の混
合物をロール上で練った後、酸化亜鉛５部、ステアリン
酸１部、イオン1.5部および加硫促進剤（住友化学製品
ソクシノールCZ）５部よりなる加硫配合剤を配合して、
混練を行った。Example 100 parts of polynorbornene powder (NOSOLEX manufactured by Zeon Corporation) and magnetic fluid (barium ferrite dispersed in eicosylnaphthalene at a concentration of 60% by weight using a surfactant) After kneading 500 parts of the mixture on a roll, a vulcanization compounding agent comprising 5 parts of zinc oxide, 1 part of stearic acid, 1.5 parts of ion and 5 parts of vulcanization accelerator (Sokushinol CZ, Sumitomo Chemical Co., Ltd.) is blended,
Kneading was performed.
この未加硫配合物を、180℃、150kgf/cm2、15分間の条
件下で、電熱プレスを用いてプレス加硫し、厚さ3mmの
シート状磁性ゴム成形品を得た。This unvulcanized compound was press-vulcanized using an electrothermal press under the conditions of 180 ° C., 150 kgf / cm 2 , and 15 minutes to obtain a sheet-shaped magnetic rubber molded product having a thickness of 3 mm.
得られたシート状磁性ゴム成形品について、直流磁化測
定器（横河北辰電機製Type3257）を用いて磁化を測定す
ると、 残留磁束密度（Br） 340 Ｇ 保磁力（Hc） 600 Oe の値がそれぞれ得られ、磁性粉体の分散性およびそれに
起因する磁力の均一性も良好であることが確かめられ
た。When the magnetization of the obtained sheet-shaped magnetic rubber molded article was measured using a DC magnetometer (Type3257 manufactured by Yokogawa Kitatsu Electric), the values of residual magnetic flux density (Br) 340 G coercive force (Hc) 600 Oe were respectively It was confirmed that the dispersibility of the magnetic powder and the uniformity of the magnetic force resulting therefrom were also good.
Claims (1)
レン（−ジエン）共重合ゴムに、これらと相溶性を有す
る高級アルキル基置換ナフタリンまたはジカルボン酸ジ
高級アルキルエステル中に磁性粉体を分散させた磁性流
体を加硫配合剤と共に配合した後、加硫成形することを
特徴とする磁性ゴムの製造法。1. A magnetic fluid in which magnetic powder is dispersed in polynorbornene or ethylene-propylene (-diene) copolymer rubber and higher alkyl group-substituted naphthalene or dicarboxylic acid di-higher alkyl ester which are compatible with them. A method for producing a magnetic rubber, which comprises compounding with a vulcanizing compounding agent and then vulcanizing and molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18459686A JPH0674355B2 (en) | 1986-08-05 | 1986-08-05 | Magnetic rubber manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18459686A JPH0674355B2 (en) | 1986-08-05 | 1986-08-05 | Magnetic rubber manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6339936A JPS6339936A (en) | 1988-02-20 |
| JPH0674355B2 true JPH0674355B2 (en) | 1994-09-21 |
Family
ID=16155975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18459686A Expired - Lifetime JPH0674355B2 (en) | 1986-08-05 | 1986-08-05 | Magnetic rubber manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0674355B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006016773A1 (en) | 2006-04-10 | 2007-10-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magneto-rheological elastomers (MRE) with polynorbornene as a carrier medium, process for producing such elastomer composites and their use |
| JP2009084308A (en) * | 2007-09-27 | 2009-04-23 | Sumitomo Rubber Ind Ltd | Rubber composition for tire tread and pneumatic tire using the same |
| JP5403397B2 (en) * | 2008-12-16 | 2014-01-29 | 住友ゴム工業株式会社 | Rubber composition for tire tread and pneumatic tire using the same |
-
1986
- 1986-08-05 JP JP18459686A patent/JPH0674355B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6339936A (en) | 1988-02-20 |
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