JPH01207396A - Electrically viscous liquid - Google Patents
Electrically viscous liquidInfo
- Publication number
- JPH01207396A JPH01207396A JP3251788A JP3251788A JPH01207396A JP H01207396 A JPH01207396 A JP H01207396A JP 3251788 A JP3251788 A JP 3251788A JP 3251788 A JP3251788 A JP 3251788A JP H01207396 A JPH01207396 A JP H01207396A
- Authority
- JP
- Japan
- Prior art keywords
- silicone oil
- viscosity
- dispersion medium
- modified silicone
- alcohol
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 25
- 229920002545 silicone oil Polymers 0.000 claims abstract description 41
- 239000002612 dispersion medium Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 229920002678 cellulose Polymers 0.000 claims abstract description 12
- 239000001913 cellulose Substances 0.000 claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract description 12
- 230000008719 thickening Effects 0.000 abstract description 9
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 abstract description 2
- 150000005846 sugar alcohols Polymers 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 16
- 229920001296 polysiloxane Polymers 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000013256 coordination polymer Substances 0.000 description 5
- 229940057995 liquid paraffin Drugs 0.000 description 5
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- -1 polysiloxane Polymers 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 125000000962 organic group Chemical group 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HEFNNWSXXWATRW-UHFFFAOYSA-N Ibuprofen Chemical compound CC(C)CC1=CC=C(C(C)C(O)=O)C=C1 HEFNNWSXXWATRW-UHFFFAOYSA-N 0.000 description 1
- 101000860173 Myxococcus xanthus C-factor Proteins 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 239000002023 wood Substances 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、電気粘性液体（Ｅ Ｖ、 Ｆ ”）に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to electrorheological liquids (EV, F'').
電気粘性液体とは、直流又は交流の電場の作用によって
粘性が速やかに増大する（ウィンズロ−効果）液体をい
う。An electrorheological liquid is a liquid whose viscosity increases rapidly under the action of a direct current or alternating current electric field (Winslow effect).
電気粘性液体は、電力によって作動流体の粘性を大きく
変え、それにより作動流体の流動抵抗変化を（り用する
１ｆｔ７？、例えばクラッチ、ショックアブソーバ、エ
ンジンマウント、ポンプ、ダンパ、バルブ、アクチュエ
ータ等に利用できる。Electrorheological liquids can be used to significantly change the viscosity of a working fluid using electricity, thereby changing the flow resistance of the working fluid (used in clutches, shock absorbers, engine mounts, pumps, dampers, valves, actuators, etc.). can.
［従来の技術］ 従来、次のような電気粘性液体が知られている。[Conventional technology] Conventionally, the following electrorheological liquids are known.
（イ）分散媒としてのシリコンオイル、分散相としての
シリカゲルを主とする電気粘性液体（米Ｉｌｌ特許第３
０４７５０７号）。(a) Electrorheological liquid mainly consisting of silicone oil as a dispersion medium and silica gel as a dispersed phase (U.S. Ill. Patent No. 3)
No. 047507).
（ロ）分散媒としての流動パラフィン、分散相としての
結晶セルロースを主とし、水等を含有する電気粘性液体
（特公昭５７−４７２３４目）。(b) An electrorheological liquid containing liquid paraffin as a dispersion medium, crystalline cellulose as a dispersed phase, and water, etc. (Japanese Patent Publication No. 57-47234).
（ハ）分散媒としてのシリコンオイル、分散相どじての
シリカゲルを主とし、かつ分散剤としてのアミノ官能性
等のポリシロキサンを含有する電気粘性液体く特開昭６
１−４４９９８￥′ｊ）。(c) An electrorheological liquid mainly composed of silicone oil as a dispersion medium and silica gel as a dispersed phase, and containing polysiloxane such as amino-functional polysiloxane as a dispersant.
1-44998￥'j).
（ニ）分散媒としてのシリコンオイル、分散相としての
珪酸アルミニウム、分散剤としてのアミノ官能１１：等
のポリシロキサンを含有する電気粘性液体く特開昭６２
−９５３９７号）。(d) An electrorheological liquid containing polysiloxane such as silicone oil as a dispersion medium, aluminum silicate as a dispersed phase, and aminofunctional 11 as a dispersant.
-95397).
［発明が解決しようとする課題］
ｉＷＩ記（イ）の電気粘性液体は、シリカゲルを分散相
とするため、電気粘性液体中のシリカゲルが使用される
装置の内部を摩耗し好ましくない。特に粘性を変化させ
るための電極を１！？Ｅ粍し、装置自体の寿命を短くし
てしまう。また、この電気粘性液体は導電性が高すぎる
ため、消費電力が多い。[Problems to be Solved by the Invention] The electrorheological liquid of iWI (a) uses silica gel as a dispersed phase, which is undesirable because the silica gel in the electrorheological liquid wears the inside of the device in which it is used. Especially one electrode for changing viscosity! ? This will cause problems and shorten the life of the device itself. In addition, this electrorheological liquid has too high conductivity, so it consumes a lot of power.
また、前記（ロ）の電気粘性液体は、前記（イ）のよう
に摩耗の問題は生じないが、ウィンズロ−効果が充分で
ない。すなわち、加熱処理前の当初に電圧を印加した時
の粘度（当初印加時粘度）が低く、かつ高温で長時間使
用した後に電圧を印加しＩＣ時の粘度（加熱処理後印加
時粘度）が極端に低下してしまう。Further, although the electrorheological liquid (b) does not cause the problem of wear as in (a), the Winslow effect is not sufficient. In other words, the viscosity when voltage is initially applied before heat treatment (viscosity at the time of initial application) is low, and the viscosity at the time of IC (viscosity at the time of application after heat treatment) is extremely low when voltage is applied after being used at high temperatures for a long time. It will drop to .
なお、前記（ハ）および前記（ニ）の電気粘性液体にお
いても、分散相をそれぞれシリカゲル、■ｉ酸アルミニ
ウムとしているため、前記（イ）と同様に摩耗の問題を
有する。Note that the electrorheological liquids (c) and (d) have the same wear problem as (i) because the dispersed phases are silica gel and aluminum oxide, respectively.
本発明は、これらの課題を解決すべくなされたちのであ
って、電気粘性液体が使用される装置の摩耗が少ないこ
と、加熱処理前の当初において電圧を印加する前の粘度
（当初印加時粘度）が低くて当初印加時粘度が高いこと
、および加熱処理後印加時粘度が低下しないこと、を具
備した摩耗性、増粘効果、耐熱性に優れた電気粘性液体
を提供することを目的とする。The present invention has been made to solve these problems, and includes: reducing wear of devices in which electrorheological liquids are used; and reducing the viscosity before applying voltage at the beginning before heat treatment (viscosity at the time of initial application). An object of the present invention is to provide an electrorheological liquid having excellent abrasion resistance, thickening effect, and heat resistance, which has a high viscosity when initially applied with a low viscosity, and whose viscosity does not decrease when applied after heat treatment.
［課題を解決するための手段］
本発明の電気粘性液体は、アミノ変性シリコンオイルと
アルコール変性シリコンオイルとのうち少なくとも１種
を含有するシリコンオイルからなる分散媒と、結晶セル
ロースからなる分散相と、多官能アルコールからなる親
水剤と、からなるものである。[Means for Solving the Problems] The electrorheological liquid of the present invention comprises a dispersion medium made of silicone oil containing at least one of amino-modified silicone oil and alcohol-modified silicone oil, and a dispersed phase made of crystalline cellulose. , and a hydrophilic agent consisting of a polyfunctional alcohol.
分散媒は、アミノ変性シリコンオイルとアルコール変性
シリコンオイルとのうち少なくとも１種を含有するシリ
コンオイルからなる。The dispersion medium is made of silicone oil containing at least one of amino-modified silicone oil and alcohol-modified silicone oil.
分散媒のシリコンオイルは、アミノ変性シリコンオイル
、アルコール変性シリコンオイルおよびそれらの混合物
の１からなることができ、また、アミノ変性シリコンオ
イルとアルコール変性シリコンオイルとのうち少なくと
も１種と非変性シリコンオイル（以下、ストレートシリ
コンオイルという）とから構成することもできる。この
分散媒は、ｙｇ電電率高いことが望ましい。The silicone oil of the dispersion medium can be composed of one of amino-modified silicone oil, alcohol-modified silicone oil, and mixtures thereof, and can also include at least one of amino-modified silicone oil and alcohol-modified silicone oil and non-modified silicone oil. (hereinafter referred to as straight silicone oil). It is desirable that this dispersion medium has a high yg electric conductivity.
アミノ変性シリコンオイルは、例えば次のものを用いる
ことができる。ここでＲは有機基、ｘｌｙは自然数を示
す。For example, the following amino-modified silicone oils can be used. Here, R is an organic group and xly is a natural number.
（以下余白）
また、アルコール変性シリコンオイルは、例えば次のも
のを用いることができる。ここで、ＲｌＲ−は有機基、
Ｘ、”ｙ’Ｇ；を自然数を示す。(Hereinafter referred to as blank space) Further, as the alcohol-denatured silicone oil, for example, the following can be used. Here, RlR- is an organic group,
X and y'G; represent natural numbers.
ストレートシリコンオイルは、例えば次のものを用いる
ことができる。ここで、Ｘは自然数を示す。For example, the following straight silicone oils can be used. Here, X represents a natural number.
分散相は、結晶はルロースからなる。この分散相は、比
表面積が大きいものが好ましい。The dispersed phase consists of crystalline ululose. This dispersed phase preferably has a large specific surface area.
結晶セルロースは、例えば次のものを用いることができ
る。ここで、Ｘは自然数を示す。For example, the following crystalline cellulose can be used. Here, X represents a natural number.
（以下余白）
メチルセルロース
メチルヒドロキシエチルセルロース（化学武略）なお、
結晶セルロースは吸着水を有することがあるため、注意
を要する。(Left below) Methylcellulose Methylhydroxyethylcellulose (chemical strategy)
Care must be taken as crystalline cellulose may have adsorbed water.
親水剤は、多官能アルコールである。The hydrophilic agent is a polyfunctional alcohol.
多官能アルコールは、例えばエチレングリコール、プロ
ピレングリコール、ブタンジオ−ル等若しくはこれらの
混合物を用いることができる。As the polyfunctional alcohol, for example, ethylene glycol, propylene glycol, butanediol, etc. or a mixture thereof can be used.
なお、分散媒と分散相とは懸濁状態の安定性のため近い
比重をもつことが望ましい。Note that it is desirable that the dispersion medium and the dispersed phase have similar specific gravity for the stability of the suspended state.
これら分散媒、分散相、親水剤の配合は、分散媒１００
重量部に対して、分散相５０〜２００重囚部、分散相ｉ
ｏｏｍｍ部に対して親木剤５〜１５重量部とすることが
望ましい。分散相が５０重組部未満では増粘効果が低く
、２００重１１部を超えると電圧を印加する前の粘度が
高すぎる。親水剤が５型開部未満では増粘効果が小さく
、１５重半部を超えると消費電力が多くなりすぎる。配
合物をミキサー等で所定時間撹拌すれば所望の電気粘性
液体が得られる。配合割合はこうして得られる電気粘性
液体を使用する装置に要求される粘性等の性能に応じて
調整する。The formulation of these dispersion medium, dispersed phase, and hydrophilic agent is as follows: dispersion medium 100%
50 to 200 parts by weight of dispersed phase, dispersed phase i
It is desirable that the parent wood agent be used in an amount of 5 to 15 parts by weight based on the oomm part. If the dispersed phase is less than 50 parts by weight, the thickening effect is low, and if it exceeds 200 parts by weight, the viscosity before voltage is applied is too high. If the hydrophilic agent has less than 5 parts, the thickening effect will be small, and if it exceeds 15 parts, the power consumption will be too high. A desired electrorheological liquid can be obtained by stirring the mixture for a predetermined period of time using a mixer or the like. The blending ratio is adjusted depending on the performance such as viscosity required of the device using the electrorheological liquid thus obtained.
なお、アミノ変性シリコンオイルおよびアルコール変性
シリコンオイルの各変性の度合いも、所望の性能により
選択できる。The degree of modification of the amino-modified silicone oil and the alcohol-modified silicone oil can also be selected depending on the desired performance.
［作用効果］
電気粘性液体中の各配合物等がどのようにしてウィンズ
ロ−効果を発揮するかは明確でないが、−膜内に次のよ
うに考えられる。すなわち、親水剤により分散媒中の分
散相粒子が界面に電気二重層を構成する。電圧を印加し
ていない時点では分散相粒子の表面に均一に電気二ｍ層
が広がっているが、電圧を印加した時点では電気二重層
を構成する自由イオンが電荷の符号と逆の符号をもつ電
極の方向へ広がり、歪を形成する。そして、分散相粒子
の表面上の歪を受けた互いに隣接する電荷同志の静電気
的引力により分散相粒子の鎖が形成され、外部から見た
ときの粘性が増大する。[Function and Effect] It is not clear how each compound in the electrorheological liquid exhibits the Winslow effect, but it is thought to occur within the membrane as follows. That is, the dispersed phase particles in the dispersion medium form an electric double layer at the interface due to the hydrophilic agent. When no voltage is applied, the electric double layer spreads uniformly on the surface of the dispersed phase particles, but when a voltage is applied, the free ions that make up the electric double layer have the opposite sign of the charge. It spreads toward the electrode and creates distortion. Then, chains of dispersed phase particles are formed due to the electrostatic attraction between adjacent charges that are subjected to strain on the surface of the dispersed phase particles, and the viscosity when viewed from the outside increases.
［実施例］ 次に、本発明を実施例とと乙に説明する。[Example] Next, the present invention will be explained with reference to examples.
第１表に示すように各試料毎に組成物を配合し、ミキサ
ーで数時間混合撹拌し、本発明の実施例（１〜１３）お
よび比較例（１４〜２つ）を得た。As shown in Table 1, a composition was blended for each sample and mixed and stirred using a mixer for several hours to obtain Examples (1 to 13) of the present invention and Comparative Examples (14 to 2).
表中、ストレート５ｏ（Ｉ）はストレートシリコンオイ
ル（Ｓ ｌ−（２００，５ｃｓｔ、トーレ・シリコーン
製）、ストレート５ｏ（Ｉｆ＞はストレートシリコンオ
イル（ＳＩ（２００，１ｃ−ｓ ｔ、 ｔ・−レ・シリ
コーン製）、ストレート５ｏ（ＩＩＩ）はストレートシ
リコンオイル（Ｓ ｌ−１２００，２０ｃｓｔ、トーμ
・シリコーン製）を示し、アミノＳＯはアミノ変性シリ
コンオイル（ＳＦ８４１７、トーμ・シリコーンＴ！Ａ
）、アルコール５ｏ（１）はアルコール変性シリコンオ
イル（ＳＦ８４２８、ＯＨ１，４％、トーμ・シリコー
ン製）、アルコールＳ○（Ｉｆ）はアルコール変性シリ
コンオイル（ＳＦ８４２７．０）−１１，８％、トーμ
・シリコーン製）を示す。また、またエポキシＳ○はエ
ポキシ変性シリコンオイル（ＳＦ８４１１、トーμ・シ
リコーンＴ！Ａ）、カルボキシルＳＯはカルボキシル変
性シリコンオイル（ＳＦ８４１８、トーμ・シリコーン
製）、ポリエーテルＳ○はポリエーテル変性シリコンオ
イル（ＳＦ３７４６、トーμ・シリコーン製）、メルカ
プトＳＯはメルカプト変性シリコンオイル（Ｘ−２２−
９８０，信越化学製）を示す。流動パラフィンはエッソ
石油製クリストールア０、ケロシン油は出光石油製ＩＰ
ソルベントを用いた。また、結晶ヒルロース（丁）はメ
チルピルロース（アビセルＰＨＭＯ６、平均粒径的６μ
、脂化成製）、結晶セルロース（ＩＩ）はメチルセルロ
ース（アビセルＰＨ１０１、平均粒径的４ｏμ、脂化成
製）、結晶セルロース（ＩＩＩ）はメチルヒドロキシエ
チルセルロース（セスカＭトＩＥｃ−２５０００ＰＦ、
第１工業製薬製）を示す。In the table, straight 5o (I) is straight silicone oil (SI (200, 5cst, made by Toray Silicone), straight 5o (If> is straight silicone oil (SI (200, 1cst, t-ray)). - Made of silicone), straight 5o (III) is made of straight silicone oil (S l-1200, 20cst, tou μ
・Made of silicone), and Amino SO is amino-modified silicone oil (SF8417, Toμ・Silicone T!A)
), Alcohol 5o (1) is alcohol-denatured silicone oil (SF8428, OH 1.4%, manufactured by Tomu Silicone), Alcohol S○ (If) is alcohol-denatured silicone oil (SF8427.0) -11.8%, Tomu Silicone μ
・Made of silicone). In addition, epoxy S○ is epoxy modified silicone oil (SF8411, TOμ Silicone T!A), carboxyl SO is carboxyl modified silicone oil (SF8418, manufactured by TOμ Silicone), and polyether S○ is polyether modified silicone oil. (SF3746, manufactured by Tou-Silicone), Mercapto SO is Mercapto modified silicone oil (X-22-
980, manufactured by Shin-Etsu Chemical). Liquid paraffin is Esso Oil's Crystolua 0, kerosene oil is Idemitsu Oil's IP
Solvent was used. In addition, crystalline hirulose (Ding) is methyl pyrulose (Avicel PHMO6, average particle size 6 μm).
The crystalline cellulose (II) is methylcellulose (Avicel PH101, average particle size 4oμ, manufactured by Fuikasei), and the crystalline cellulose (III) is methyl hydroxyethyl cellulose (Seska M IEc-25000PF,
(manufactured by Daiichi Kogyo Seiyaku).
なお、表中、組成物の後の（）内は、重量部を示す。ま
た、水は、９重間部の吸着水に調湿した各結晶セルロー
ス中の水を示す。エチレングリコール、プロピレングリ
コールを添加するときには、この水が存在しないように
１００℃Ｘ１５０分保持した後の各結晶セルロースを用
いた。In the table, the numbers in parentheses after the composition indicate parts by weight. Moreover, water indicates the water in each crystalline cellulose whose humidity has been adjusted to adsorbed water in the ninefold interspace. When adding ethylene glycol and propylene glycol, each crystalline cellulose was used after being maintained at 100° C. for 150 minutes so that no water was present.
実施例および比較例の特性は次のように測定した。The properties of Examples and Comparative Examples were measured as follows.
（ウィンズロ−効果）
二重円筒型粘度計（電極間隔２ｍｍ）を用い、電界強度
がＱｋｖ／ｍｍときの粘度と、電界強度が２゜ＱｋＶ／
’ｌ１１ｍのときの粘度とを、せん断速度６３ｓｅｃ−
’の条件下で七−夕に接続したトルクメータから求め、
当初印加時粘度（ＣＰ）と当初印加時粘度（ＣＰ）とし
た。また、各試料（１〜２９〉を１２０℃×１６８時間
保持した後に、常温で同様に測定し、加熱処理後印加前
粘度（ＣＰ）と加熱処］！Ｉ！後印加時粘度（ＣＰ）と
した。なお、加熱処理後印加前粘度は表示していない。(Winslow effect) Using a double cylindrical viscometer (electrode spacing 2 mm), calculate the viscosity when the electric field strength is Qkv/mm and the viscosity when the electric field strength is 2°QkV/mm.
'The viscosity at l11m and the shear rate 63sec-
Determined from the torque meter connected to Tanabata under the conditions of ',
Viscosity at initial application (CP) and viscosity at initial application (CP). In addition, after each sample (1 to 29) was held at 120°C for 168 hours, it was measured in the same manner at room temperature, and the viscosity after heat treatment (CP) and the viscosity after heat treatment (CP) were measured. Note that the viscosity after heat treatment and before application is not shown.
（導電性）
該二手円筒型粘度計の外筒と内筒間の電流値（μＡ／ｃ
ｖ２）を電界強１ｆ２．Ｏｋｖ／ｍｍ下で求めた。(Conductivity) Current value between the outer cylinder and inner cylinder of the two-handed cylindrical viscometer (μA/c
v2) to the electric field strength 1f2. It was determined under Okv/mm.
（膨潤性）
各試料（１〜２９）中にカーボン含有加硫天然（ＮＲ）
ゴムを室温で３日間浸漬し、膨潤状態を目視した。(Swellability) Vulcanized natural (NR) containing carbon in each sample (1 to 29)
The rubber was immersed at room temperature for 3 days, and the state of swelling was visually observed.
これらの結果も第１表に合わＵて記載した。These results are also listed in Table 1.
第１表かられかるように、本発明の実施例（１〜１３）
は、当初印加前粘度が小さく（６０〜３５００Ｐ） 、
当初印加時粘度が非常に大きいく５０００〜２２０００
ＣＰ）ため、増粘効果に優れる。また、本発明の実施例
（１〜１３）は、加熱も埋後印加時粘度が極端に減少す
ることなく、中には増大したものもあり、耐熱性がよい
。As seen from Table 1, Examples (1 to 13) of the present invention
The viscosity before application is initially small (60 to 3500P),
The viscosity at the time of initial application is very high (5000 to 22000)
CP), it has an excellent thickening effect. Further, in Examples (1 to 13) of the present invention, the viscosity did not decrease excessively when applied after being heated, and some of the viscosity increased in some cases, and thus had good heat resistance.
ところが、従来の前記（ロ）に該当する分散媒に流動パ
ラフィン等、親水剤に水を用いた比較例（１４〜１６）
は、当初印加時粘度が小さすぎる（２０００〜３６００
０Ｐ）、たしかに、塩化アンモニウムを添加した比較例
（１５）は当初印加時粘度が少し上がるが、増大効果は
少ない。しかも、比較例（１４〜１６）は、加熱処理後
印加時粘度が悪いため、耐熱性がなく、かつ導電性が高
すぎる（２５〜９４μ△／Ｃ信２）。However, conventional comparative examples (14 to 16) in which liquid paraffin or the like was used as the dispersion medium and water was used as the hydrophilic agent corresponded to (b) above.
The viscosity at the time of initial application is too small (2000 to 3600
0P), it is true that in Comparative Example (15) in which ammonium chloride was added, the viscosity increases a little upon initial application, but the increasing effect is small. Moreover, the comparative examples (14 to 16) have poor viscosity when applied after heat treatment, so they lack heat resistance and have too high conductivity (25 to 94 μΔ/C signal 2).
また、分散媒に流動パラフィン、親水剤にエチレングリ
コールを用いた比較例（１７）は、当初印加時粘度が小
さすぎるため、増粘効果に劣る。Further, in Comparative Example (17) in which liquid paraffin was used as the dispersion medium and ethylene glycol was used as the hydrophilic agent, the viscosity at the time of initial application was too small, so the thickening effect was poor.
また、分散媒にストレートシリコンオイルのみ、親水剤
に水を用いた比較例（１８，１９）は、結晶セルロース
の増加によって、当初印加前粘度と当初印加時粘度がと
もに上がってしまい、増粘効果に劣るとともに、加熱処
理後印加時粘度が悪いため、耐熱性に劣る。In addition, in comparative examples (18, 19) in which only straight silicone oil was used as the dispersion medium and water was used as the hydrophilic agent, both the viscosity before application and the viscosity at the time of initial application increased due to the increase in crystalline cellulose, resulting in a thickening effect. In addition, the viscosity during application after heat treatment is poor, resulting in poor heat resistance.
さらに、実施例（１）と比較例（２０） 、実施例（４
）と比較例（２１）、実施例（５）と比較例（２２）、
実施例（６）と比較例（２３）、実施例（７）と比較例
（２４）をそれぞれ比較すると、分散媒にストレートシ
リコンオイルのみを用いた比較例より、本発明の実施例
は増粘効果が大きいことがわかる。Furthermore, Example (1), Comparative Example (20), Example (4)
) and comparative example (21), example (5) and comparative example (22),
Comparing Example (6) and Comparative Example (23), and Example (7) and Comparative Example (24), the Example of the present invention has a higher viscosity than the Comparative Example using only straight silicone oil as the dispersion medium. It can be seen that the effect is large.
また、比較例（２５）は、増粘効果は満足できても、加
熱処理後印加時粘度が悪いため、耐熱性に劣る。Furthermore, although Comparative Example (25) has a satisfactory thickening effect, it has poor heat resistance because of its poor viscosity when applied after heat treatment.
また、ストレートシリコンオイルの他に、エポキシ変性
シリコンオイル等を用いて分散媒とした比較例（２６〜
２９）は、当初印加前粘度が上が−）でしまったり、ゲ
ル化してしまい、好ましくない。In addition, in addition to straight silicone oil, comparative examples (26~
29) is not preferable because the initial viscosity before application becomes -) or gels.
なお、ＮＲゴムと接触したときのＮＲゴムの状態を測定
した結果、分散媒に流動パラフィン又はケロシン油を用
いた比較例（１４〜１７）は、膨潤性が大きく好ましく
ないことがわかる。In addition, as a result of measuring the state of the NR rubber when it comes into contact with the NR rubber, it is found that the comparative examples (14 to 17) in which liquid paraffin or kerosene oil was used as the dispersion medium were undesirable because of their large swelling properties.
［発明の効果］
本発明の電気粘性液体は、使用される装置の内部を摩耗
しにくく、増粘効果が大きく、耐熱性がよく、かつゴム
を膨潤させることがない。[Effects of the Invention] The electrorheological liquid of the present invention does not easily wear out the inside of the device in which it is used, has a large thickening effect, has good heat resistance, and does not cause rubber to swell.
特許出願人 東海ゴム工業株式会社Patent applicant: Tokai Rubber Industries Co., Ltd.
Claims (1)
コンオイルとのうち少なくとも１種を含有するシリコン
オイルからなる分散媒と、 結晶セルロースからなる分散相と、 多官能アルコールからなる親水剤と、からなる電気粘性
液体。(1) An electrorheological agent consisting of a dispersion medium made of silicone oil containing at least one of amino-modified silicone oil and alcohol-modified silicone oil, a dispersed phase made of crystalline cellulose, and a hydrophilic agent made of polyfunctional alcohol. liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032517A JPH07103391B2 (en) | 1988-02-15 | 1988-02-15 | Electrorheological liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032517A JPH07103391B2 (en) | 1988-02-15 | 1988-02-15 | Electrorheological liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01207396A true JPH01207396A (en) | 1989-08-21 |
| JPH07103391B2 JPH07103391B2 (en) | 1995-11-08 |
Family
ID=12361160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63032517A Expired - Lifetime JPH07103391B2 (en) | 1988-02-15 | 1988-02-15 | Electrorheological liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103391B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01284595A (en) * | 1988-05-12 | 1989-11-15 | Tonen Corp | Electroviscous fluid excellent in high-temperature stability and response |
| US5925288A (en) * | 1994-01-31 | 1999-07-20 | Tonen Corporation | Electrorheological fluid containing silica particles esterified by an alcohol-modified silicone oil |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197595A (en) * | 1988-02-02 | 1989-08-09 | Tokai Rubber Ind Ltd | Electroviscous liquid |
-
1988
- 1988-02-15 JP JP63032517A patent/JPH07103391B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197595A (en) * | 1988-02-02 | 1989-08-09 | Tokai Rubber Ind Ltd | Electroviscous liquid |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01284595A (en) * | 1988-05-12 | 1989-11-15 | Tonen Corp | Electroviscous fluid excellent in high-temperature stability and response |
| US5925288A (en) * | 1994-01-31 | 1999-07-20 | Tonen Corporation | Electrorheological fluid containing silica particles esterified by an alcohol-modified silicone oil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07103391B2 (en) | 1995-11-08 |
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