JPH11269403A - Carbon black and polymer composition thereof - Google Patents
Carbon black and polymer composition thereofInfo
- Publication number
- JPH11269403A JPH11269403A JP9397498A JP9397498A JPH11269403A JP H11269403 A JPH11269403 A JP H11269403A JP 9397498 A JP9397498 A JP 9397498A JP 9397498 A JP9397498 A JP 9397498A JP H11269403 A JPH11269403 A JP H11269403A
- Authority
- JP
- Japan
- Prior art keywords
- carbon black
- resistance
- polymer
- dispersibility
- surface area
- 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.)
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- Compositions Of Macromolecular Compounds (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ゴムや樹脂等のポ
リマー成分への分散性に優れたカーボンブラック及びそ
のカーボンブラックを配合して抵抗安定性、特に比抵抗
が１０4 〜１０10Ω・cmの高抵抗域における抵抗安定性
に優れたポリマー組成物に関する。BACKGROUND OF THE INVENTION The present invention relates to a carbon black excellent in dispersibility in a polymer component such as a rubber or a resin and a carbon black blended with the carbon black to provide a resistance stability, particularly, a specific resistance of 10 4 to 10 10 Ω · The present invention relates to a polymer composition having excellent resistance stability in a high resistance region of 1 cm.
【０００２】[0002]
【従来の技術】カーボンブラックの導電性を利用してゴ
ムや樹脂等のポリマー成分に配合した導電性ゴム組成物
あるいは導電性樹脂組成物等は、電子機器類の静電防止
や電磁波シールド材等として有用されている。カーボン
ブラックの導電性能はカーボンブラックの物理化学的性
状によって異なり、一般にカーボンブラック粒子の大き
さ（比表面積）、ストラクチャー、カーボンブラック粒
子表面の吸着物質や粒子内部の結晶度等によって支配さ
れ、粒子径が小さく（比表面積が大きく）、ストラクチ
ャーあるいは結晶度が高く、吸着物質が少ないほど、導
電性が向上するといわれている。2. Description of the Related Art A conductive rubber composition or a conductive resin composition mixed with a polymer component such as rubber or resin utilizing the conductivity of carbon black is used for preventing static electricity of electronic equipment and for shielding electromagnetic waves. Has been useful as. The conductive properties of carbon black vary depending on the physicochemical properties of carbon black, and are generally governed by the size (specific surface area), structure, adsorbed material on the surface of the carbon black particles, crystallinity inside the particles, etc. It is said that the smaller the particle size (the larger the specific surface area), the higher the structure or crystallinity, and the smaller the amount of the adsorbed substance, the higher the conductivity.
【０００３】そこで、本出願人はゴム成分や樹脂成分と
の親和性が良好で優れた導電性を付与するカーボンブラ
ックとして、窒素吸着比表面積１８０m2/g以下、圧縮Ｄ
ＢＰ吸油量８５ml/100g 以上の特性領域にあって、脱気
開始温度５００℃以上、真比重値１．８４０以下の選択
的特性を有する導電性カーボンブラックを提案（特開昭
61−111368号公報）した。Accordingly, the present applicant has proposed a carbon black having a good affinity for a rubber component and a resin component and imparting excellent conductivity, a nitrogen adsorption specific surface area of 180 m 2 / g or less, and a compression D
A conductive carbon black having selective characteristics of a deaeration start temperature of 500 ° C. or more and a true specific gravity value of 1.840 or less in a characteristic region with a BP oil absorption of 85 ml / 100 g or more is proposed (Japanese Patent Laid-Open No.
No. 61-111368).
【０００４】また、特開平６−１１６５０１号公報に
は、非晶性耐熱樹脂１００重量部にヨウ素吸着量が５２
〜７２mg/g、ＤＢＰ吸油量が１５２〜１８２ml/100g 、
24Ｍ４ＤＢＰ吸油量が１００ml/100g 以上で、トルエン
着色透過度が８５％以上のファーネスブラックを２０〜
４０重量部含有してなる耐熱導電性樹脂組成物が開示さ
れている。この発明によれば高温加熱下での寸法安定性
に優れ、また表面抵抗値で１×１０5 Ω未満の導電性が
付与されるとしている。Japanese Patent Application Laid-Open No. Hei 6-116501 discloses that an iodine adsorption amount of 52 parts per 100 parts by weight of an amorphous heat-resistant resin is used.
~ 72mg / g, DBP oil absorption 152 ~ 182ml / 100g,
Furnace black having a 24M4 DBP oil absorption of 100 ml / 100 g or more and a toluene coloring transmittance of 85% or more is used in a range of 20 to 40%.
A heat-resistant conductive resin composition containing 40 parts by weight is disclosed. According to the present invention, the dimensional stability under high-temperature heating is excellent, and conductivity of less than 1 × 10 5 Ω in surface resistance is provided.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、近年、
ＯＡ用のロールやＩＣ関連機器の包装、運搬用のゴム材
料あるいは樹脂材料として、高抵抗域例えば比抵抗が１
０4 〜１０10Ω・cm程度の高抵抗域あるいはそれ以上の
レベルにおいて安定な電気抵抗を示すゴム組成物や樹脂
組成物のニーズが高まっている。通常、このような高抵
抗域においての抵抗安定性を図ることは、カーボンブラ
ックが準導電性物質であることから電気抵抗が急激に減
少し始める、いわゆるパーコレーション領域での抵抗の
安定性が要求されることとなるので極めて困難である。However, in recent years,
As a rubber or resin material for packaging and transporting OA rolls and IC-related equipment, a high-resistance region, for example, having a specific resistance of 1
Needs of the rubber composition and a resin composition which exhibits stable electrical resistance is increasing at 0 4 ~10 10 Ω · cm as high resistance region or more levels. Usually, to achieve the resistance stability in such a high resistance region, the resistance of the resistance in a so-called percolation region is required, since the electrical resistance starts to rapidly decrease because carbon black is a quasi-conductive substance. It is extremely difficult.
【０００６】そこで、本発明者は比抵抗が１０4 〜１０
10Ω・cmの高抵抗域において安定な抵抗特性を示すポリ
マー組成物について研究を進めた結果、カーボンブラッ
クの比表面積、造粒特性及び表面性状等を特定すること
によりゴム成分や樹脂成分への分散性能が向上し、安定
な分散状態を維持し得ることを見出した。更に、カーボ
ンブラックが安定な分散状態で均一にゴム組成物や樹脂
組成物中に分布する結果抵抗変化が少なく、安定な抵抗
特性を示すことを確認した。Therefore, the present inventor has determined that the specific resistance is 10 4 to 10.
As a result of research on a polymer composition that shows stable resistance characteristics in the high resistance region of 10 Ωcm, the specific surface area, granulation characteristics, surface properties, etc. of carbon black were specified to determine the rubber component and resin component. It has been found that the dispersion performance is improved and a stable dispersion state can be maintained. Furthermore, it was confirmed that the carbon black was uniformly distributed in a stable dispersion state in the rubber composition or the resin composition, and as a result, the resistance change was small and the carbon black exhibited stable resistance characteristics.
【０００７】本発明は上記の知見に基づいて開発された
もので、その目的はポリマー成分への分散性能に優れた
カーボンブラック、及び該カーボンブラックを配合し
た、例えばＯＡ用のロールやＩＣ関連機器の包装、運搬
用等のゴム材料あるいは樹脂材料等として好適に用いる
ことのできる比抵抗が１０4 〜１０10Ω・cmの高抵抗域
における抵抗安定性に優れたポリマー組成物を提供する
ことにある。The present invention has been developed on the basis of the above findings, and its object is to provide carbon black excellent in dispersibility in a polymer component, and to mix such carbon black, for example, OA rolls and IC-related equipment. It is an object of the present invention to provide a polymer composition which can be suitably used as a rubber material or a resin material for packaging, transportation, etc., and has excellent resistance stability in a high resistance region of 10 4 to 10 10 Ω · cm. is there.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
めの本発明によるカーボンブラックは、窒素吸着比表面
積(N2SA)が６０〜１２５m2/g、造粒粒子の硬さが２．０
〜９．０g/粒、トルエン着色透過度が９０％以上の特性
を有することを構成上の特徴とする。The carbon black according to the present invention for achieving the above objects has a nitrogen adsorption specific surface area (N 2 SA) of 60 to 125 m 2 / g and a hardness of granulated particles of 2. 0
It is characterized in that it has a characteristic of 〜9.0 g / particle and a toluene color transmittance of 90% or more.
【０００９】また、本発明のポリマー組成物は、ポリマ
ー成分に窒素吸着比表面積(N2SA)が６０〜１２５m2/g、
造粒粒子の硬さが２．０〜９．０g/粒、トルエン着色透
過度が９０％以上の特性を有するカーボンブラックを配
合してなり、比抵抗が１０4〜１０10Ω・cmの高抵抗域
において優れた抵抗安定性を備えることを構成上の特徴
とする。Further, the polymer composition of the present invention has a nitrogen adsorption specific surface area (N 2 SA) of 60 to 125 m 2 / g,
A carbon black having a property that the hardness of the granulated particles is 2.0 to 9.0 g / particle and the toluene coloring transmittance is 90% or more, and the specific resistance is as high as 10 4 to 10 10 Ω · cm. It is characterized by having excellent resistance stability in a resistance region.
【００１０】[0010]
【発明の実施の形態】上記構成におけるカーボンブラッ
クの各特性は、以下の測定方法によって得られる値が用
いられる。 窒素吸着比表面積(N2SA)；ＡＳＴＭ Ｄ3037−88
“Standard Test Methods for Carbon Black-SurfaceAr
ea By Nitrogen Adsorption”Method Ｂによる。 造粒粒子の硬さ；ＪＩＳ Ｋ6221−82「ゴム用カーボ
ンブラックの試験方法」6.3.3 項による。 トルエン着色透過度；ＪＩＳ Ｋ6221−82「ゴム用カ
ーボンブラックの試験方法」6.2.4 項による。BEST MODE FOR CARRYING OUT THE INVENTION The values obtained by the following measuring methods are used for each characteristic of carbon black in the above constitution. Nitrogen adsorption specific surface area (N 2 SA); ASTM D3037-88
“Standard Test Methods for Carbon Black-SurfaceAr
ea By Nitrogen Adsorption "Method B. Hardness of granulated particles; JIS K6221-82" Test method of carbon black for rubber ", Section 6.3.3. Toluene color transmittance: according to JIS K6221-82 "Test method for carbon black for rubber", section 6.2.4.
【００１１】本発明においてポリマー成分に配合するカ
ーボンブラックの窒素吸着比表面積(N2SA)の値を６０〜
１２５m2/gの範囲に設定するのは、カーボンブラックの
ポリマー成分中への分散性を高め、安定な分散状態を維
持するためである。窒素吸着比表面積(N2SA)が６０m2/g
未満であると、カーボンブラックをポリマー成分に配
合、混練する過程において分散状態の変化が大きく、例
えば混練時間による比抵抗の変化率が大きくなる。一
方、１２５m2/gを越えると分散性が低下するために安定
な分散状態、すなわち安定な抵抗特性が得難くなる。In the present invention, the value of the nitrogen adsorption specific surface area (N 2 SA) of the carbon black blended in the polymer component is set to 60 to
The reason for setting the range to 125 m 2 / g is to increase the dispersibility of the carbon black in the polymer component and maintain a stable dispersion state. Nitrogen adsorption specific surface area (N 2 SA) is 60m 2 / g
If it is less than 1, the dispersion state changes greatly in the process of mixing and kneading the carbon black with the polymer component, and for example, the rate of change in the specific resistance due to the kneading time increases. On the other hand, if it exceeds 125 m 2 / g, the dispersibility is reduced, so that it is difficult to obtain a stable dispersion state, that is, a stable resistance characteristic.
【００１２】また、分散性能を向上させて短時間でミク
ロな分散状態に到達させるためには造粒粒子の硬さが大
きく影響し、本発明は造粒粒子の硬さを２．０〜９．０
g/粒の範囲に設定するものである。すなわち、造粒粒子
の硬さが９．０g/粒を越えると混練過程においてミクロ
分散状態に到達させるための混練時間が長くかかり、結
果的に混練時間による比抵抗の変化率の増大を招くため
である。しかしながら造粒粒子の硬さが２．０g/粒を下
回る場合には、搬送や混練等の作業時に破粒が生じて微
粉化し易く、微粉によりゴム成分や樹脂成分中への分散
性が著しく低下し、更に配合時に微粉の飛散による配合
量の低下が生じて抵抗特性の変動を招くこととなる。な
お、造粒法は常用の湿式造粒機あるいは乾式造粒機によ
り適宜造粒条件を調整することにより所定硬さの造粒粒
子を得ることができる。In order to improve the dispersing performance and reach a microscopic dispersion state in a short time, the hardness of the granulated particles has a great effect. .0
g / grain range. That is, if the hardness of the granulated particles exceeds 9.0 g / particle, the kneading time for reaching the micro-dispersed state in the kneading process is long, and as a result, the rate of change in resistivity due to the kneading time is increased. It is. However, when the hardness of the granulated particles is less than 2.0 g / grain, the particles are easily broken down during work such as transporting and kneading, and the dispersibility in the rubber component and the resin component is significantly reduced by the fine powder. Further, at the time of compounding, the amount of compounding decreases due to scattering of fine powder, which causes fluctuations in resistance characteristics. In the granulation method, granules having a predetermined hardness can be obtained by appropriately adjusting the granulation conditions using a conventional wet granulator or dry granulator.
【００１３】更に、本発明のポリマー成分への分散性に
優れたカーボンブラックはトルエン着色透過度が９０％
以上であることが必要である。トルエン着色透過度は、
カーボンブラックが炭化水素原料の熱分解により生成す
る過程において未分解炭化水素がカーボンブラックに残
留した程度を示すもので、残留する未分解炭化水素量が
少ないほどトルエン着色透過度は高くなる。すなわちト
ルエン着色透過度が９０％未満では、ポリマー組成物中
においてカーボンブラックとポリマー分子との界面に存
在する未分解炭化水素による電気抵抗のばらつきが大き
くなり、比抵抗の不安定化が増大するためである。The carbon black of the present invention having excellent dispersibility in the polymer component has a toluene coloring transmittance of 90%.
It is necessary to be above. Toluene color permeability
It indicates the degree to which undecomposed hydrocarbons remain in the carbon black in the process in which carbon black is generated by thermal decomposition of the hydrocarbon raw material. The smaller the amount of undecomposed hydrocarbons remaining, the higher the toluene coloring transmittance. That is, if the toluene coloring transmittance is less than 90%, the dispersion of the electric resistance due to the undecomposed hydrocarbon present at the interface between the carbon black and the polymer molecules in the polymer composition becomes large, and the instability of the specific resistance increases. It is.
【００１４】なお、ポリマー成分に配合する際の混練条
件により分散率が低下したり、分散性を更に高める必要
があるなどの場合には、カーボンブラックのＤＢＰ吸油
量を６０ ml/100g以上の値に設定することが好ましい。When the dispersibility is lowered or the dispersibility needs to be further increased depending on the kneading conditions at the time of blending with the polymer component, the DBP oil absorption of the carbon black is set to a value of 60 ml / 100 g or more. It is preferable to set
【００１５】このように、本発明のカーボンブラックに
よれば、特定したカーボンブラックの特性が総合的に機
能してポリマー成分への分散性能を著しく向上させるこ
とが可能となる。その結果、混練条件による電気抵抗の
変動を抑制することが可能となる。したがって、ポリマ
ー成分への配合量を適宜に設定することにより比抵抗が
１０4 〜１０10Ω・cm以上の高抵抗域において優れた抵
抗安定性を示すポリマー組成物を提供することができ
る。すなわちパーコレーション領域における抵抗安定性
の優れたポリマー組成物が提供される。As described above, according to the carbon black of the present invention, the properties of the specified carbon black function comprehensively, and it is possible to remarkably improve the dispersibility in the polymer component. As a result, it is possible to suppress a change in electric resistance due to kneading conditions. Therefore, a polymer composition exhibiting excellent resistance stability in a high resistance region having a specific resistance of 10 4 to 10 10 Ω · cm or more can be provided by appropriately setting the amount of the polymer component. That is, a polymer composition having excellent resistance stability in the percolation region is provided.
【００１６】なお、本発明のポリマー組成物を構成する
ポリマー成分としては各種のゴム、樹脂をはじめインキ
用ビヒクルにも適用可能であり、また、ポリマー組成物
の用途によって他の無機質フィラー、無機薬品類等を適
宜添加することができる。The polymer component of the polymer composition of the present invention can be applied to various rubbers, resins, ink vehicles, and other inorganic fillers and inorganic chemicals depending on the use of the polymer composition. And the like can be appropriately added.
【００１７】[0017]
【実施例】以下、本発明の実施例を比較例と対比して具
体的に説明する。EXAMPLES Examples of the present invention will be specifically described below in comparison with comparative examples.
【００１８】実施例１〜４、比較例１〜６ 表１に示す特性のカーボンブラック試料を表２に示す配
合比率でＥＰＤＭゴムに配合した。なお、カーボンブラ
ックのみ変量配合とした。また、配合は下記の混練条件
で行い、混練時間は４、６、１２分間と変更して行っ
た。Ｂ型バンバリー(1800cc)練り、コンベンショナル
法、混練り時間;4,6,12 min.、ローター回転数;51/60 r
pm、Examples 1 to 4 and Comparative Examples 1 to 6 Carbon black samples having the characteristics shown in Table 1 were compounded in EPDM rubber at the compounding ratio shown in Table 2. Note that only carbon black was mixed in a variable amount. The compounding was performed under the following kneading conditions, and the kneading time was changed to 4, 6, and 12 minutes. B-type Banbury (1800cc) kneading, conventional method, kneading time: 4, 6, 12 min., Rotor rotation speed: 51/60 r
pm,
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 （注）*1 住友化学工業（株）製“エスプレン 501Ａ”[Table 2] (Note) * 1 "Esplen 501A" manufactured by Sumitomo Chemical Co., Ltd.
【００２１】各配合物を１５０℃で４０分間加硫してゴ
ム組成物シート(120×120 ×2mm)を作製し、それらの各
ゴム組成物シートについて下記の方法により電気抵抗を
測定した。 体積固有抵抗 LogＶＲ（Ω・cm）；ＪＩＳ Ｋ6723法に
準拠し、電極70φ、印加時間 60sec、印加電圧 5Ｖ、測
定温度30℃の条件で測定した。Each compound was vulcanized at 150 ° C. for 40 minutes to prepare a rubber composition sheet (120 × 120 × 2 mm), and the electrical resistance of each rubber composition sheet was measured by the following method. Volume specific resistance LogVR (Ω · cm): Measured under the conditions of an electrode 70φ, an application time of 60 sec, an applied voltage of 5 V, and a measurement temperature of 30 ° C. in accordance with JIS K6723 method.
【００２２】このようにして得られた結果のうち、混練
時間を４分間と一定にした場合に、表１に示した各カー
ボンブラックの配合量と体積固有抵抗を表３（実施例）
及び表４（比較例）に示した。Of the results thus obtained, when the kneading time was fixed at 4 minutes, the blending amount and volume resistivity of each carbon black shown in Table 1 were shown in Table 3 (Example).
And Table 4 (Comparative Example).
【００２３】[0023]
【表３】 （注）*1 表１に示した特性のカーボンブラック試料を
配合。[Table 3] (Note) * 1 Carbon black samples with the characteristics shown in Table 1 are blended.
【００２４】[0024]
【表４】 （注）*1 表１に示した特性のカーボンブラック試料を
配合。[Table 4] (Note) * 1 Carbon black samples with the characteristics shown in Table 1 are blended.
【００２５】次に、カーボンブラックの配合量を一定と
し、混練時間を変えた場合の体積固有抵抗の変化を表５
（実施例）及び表６（比較例）に示した。Next, the change in volume resistivity when the mixing amount of carbon black is fixed and the kneading time is changed is shown in Table 5.
(Examples) and Table 6 (Comparative Examples).
【００２６】[0026]
【表５】 （注）*1 表１に示した特性のカーボンブラックを配合。 *2 混練時間が４分と１２分の時の体積固有抵抗の差。 体積固有抵抗（12分）−体積固有抵抗(4分）の値[Table 5] (Note) * 1 Contains carbon black with the characteristics shown in Table 1. * 2 Difference in volume resistivity when kneading time is 4 minutes and 12 minutes. Volume resistivity (12 minutes)-Volume resistivity (4 minutes)
【００２７】[0027]
【表６】 [Table 6]
【００２８】また、カーボンブラック配合量 (PHR)と体
積固有抵抗 LogＶＲ（Ω・cm）の関係を図１及び図２
に、混練時間と体積固有抵抗 LogＶＲ（Ω・cm）の関係
を図３、図４及び図５に示した。FIGS. 1 and 2 show the relationship between the carbon black blending amount (PHR) and the volume resistivity LogVR (Ω · cm).
FIG. 3, FIG. 4, and FIG. 5 show the relationship between the kneading time and the volume specific resistance LogVR (Ω · cm).
【００２９】表１〜表６及び図１〜図５を考察して明ら
かなように、本発明で特定した窒素吸着比表面積(N2S
A)、造粒粒子の硬さ、及びトルエン着色透過度を有する
カーボンブラックを配合した実施例１〜４のゴム組成物
は、これらの特性の少なくとも１つが外れるカーボンブ
ラックを配合した比較例１〜６のゴム組成物に比べて、
カーボンブラックの配合量を変えた場合の体積固有抵抗
の変化、及び、混練時間を変えた場合の体積固有抵抗の
変化が少ないことが判る。As apparent from consideration of Tables 1 to 6 and FIGS. 1 to 5, the nitrogen adsorption specific surface area (N 2 S
A), the hardness of the granulated particles, and the rubber compositions of Examples 1 to 4 blended with carbon black having toluene coloring permeability, Comparative Examples 1 to 4 blended with carbon black deviating from at least one of these properties Compared to the rubber composition of No. 6,
It can be seen that the change in volume resistivity when the amount of carbon black is changed and the change in volume resistivity when the kneading time is changed are small.
【００３０】すなわち、表３〜４及び図１〜２から実施
例１〜３のカーボンブラックを配合したゴム組成物はカ
ーボンブラック配合量を多くしても体積固有抵抗の低下
が少なく、特に電気抵抗が１０4 〜１０10Ω・cmレベル
の高抵抗域においてカーボンブラックの配合量が変化し
ても体積固有抵抗の低下の傾きが緩やかで、比較例に比
べてパーコレーション領域における抵抗安定性に優れて
いることが判明する。That is, from Tables 3 and 4 and FIGS. 1 and 2, the rubber compositions containing the carbon blacks of Examples 1 to 3 show little decrease in volume resistivity even if the amount of carbon black is increased, and particularly the electric resistance. However, even if the amount of carbon black changes in the high resistance region of the level of 10 4 to 10 10 Ω · cm, the slope of the decrease in the volume resistivity is gentle, and the resistance stability in the percolation region is superior to that of the comparative example. Turns out to be.
【００３１】また、表５〜６及び図３〜５からカーボン
ブラック配合量を一定とし、混練時間を変えた場合の１
０4 〜１０10Ω・cmレベルの高抵抗域における体積固有
抵抗の変化は、実施例は比較例に比べていずれも少な
く、混練時間の変動による抵抗安定性に優れていること
が認められる。Further, from Tables 5 to 6 and FIGS. 3 to 5, when the amount of carbon black is fixed and the kneading time is changed,
The change in the volume resistivity in the high resistance region of the level of 0 4 to 10 10 Ω · cm is smaller in each of the examples than in the comparative example, and it is recognized that the resistance stability due to the fluctuation of the kneading time is excellent.
【００３２】[0032]
【発明の効果】以上のとおり、窒素吸着比表面積(N2S
A)、造粒粒子の硬さ、トルエン着色透過度が特定範囲に
ある本発明のカーボンブラックはポリマー成分への分散
性能が優れており、その結果本発明のカーボンブラック
を配合したポリマー組成物によればカーボンブラックの
配合量の変動や混練時間の長短等による体積固有抵抗の
変動が極めて少なく、抵抗安定性に優れていることが認
められる。特に、１０4 〜１０10Ω・cm程度の高抵抗域
における抵抗安定性が高く、例えばＯＡ用のロールやＩ
Ｃ関連機器の包装、運搬用のゴム材料あるいは樹脂材料
として極めて有用である。As described above, the nitrogen adsorption specific surface area (N 2 S
A), the hardness of the granulated particles, the carbon black of the present invention having a specific range of toluene coloring transmittance is excellent in the dispersing performance to the polymer component, and as a result, a polymer composition containing the carbon black of the present invention is obtained. According to this, it is recognized that the fluctuation of the volume resistivity due to the fluctuation of the compounding amount of carbon black and the length of the kneading time is extremely small, and the resistance stability is excellent. Particularly, the resistance stability is high in a high resistance region of about 10 4 to 10 10 Ω · cm.
It is extremely useful as a rubber or resin material for packaging and transporting C-related equipment.
【図１】実施例１と比較例１、２によるポリマー組成物
のカーボンブラック配合量と体積固有抵抗の関係グラフ
である。FIG. 1 is a graph showing the relationship between the compounding amount of carbon black and the volume resistivity of the polymer compositions according to Example 1 and Comparative Examples 1 and 2.
【図２】実施例２、３と比較例４、５によるポリマー組
成物のカーボンブラック配合量と体積固有抵抗の関係グ
ラフである。FIG. 2 is a graph showing the relationship between the amount of carbon black blended and the volume resistivity of the polymer compositions according to Examples 2 and 3 and Comparative Examples 4 and 5.
【図３】実施例１と比較例１、２、３によるポリマー組
成物の混練時間と体積固有抵抗の関係グラフである。FIG. 3 is a graph showing the relationship between the kneading time and the volume resistivity of the polymer composition according to Example 1 and Comparative Examples 1, 2, and 3.
【図４】実施例２、３と比較例４、５によるポリマー組
成物の混練時間と体積固有抵抗の関係グラフである。FIG. 4 is a graph showing the relationship between the kneading time and the volume resistivity of the polymer compositions according to Examples 2 and 3 and Comparative Examples 4 and 5.
【図５】実施例４と比較例６によるポリマー組成物の混
練時間と体積固有抵抗の関係グラフである。FIG. 5 is a graph showing the relationship between kneading time and volume resistivity of the polymer compositions according to Example 4 and Comparative Example 6.
Claims (2)
m2/g、造粒粒子の硬さが２．０〜９．０g/粒、トルエン
着色透過度が９０％以上の特性を有するポリマー成分へ
の分散性に優れたカーボンブラック。1. A nitrogen adsorption specific surface area (N 2 SA) of 60 to 125.
Carbon black excellent in dispersibility in a polymer component having m 2 / g, hardness of granulated particles of 2.0 to 9.0 g / particle, and toluene coloring transmittance of 90% or more.
A)が６０〜１２５m2/g、造粒粒子の硬さが２．０〜９．
０g/粒、トルエン着色透過度が９０％以上の特性を有す
るカーボンブラックを配合してなり、比抵抗が１０4 〜
１０10Ω・cmの高抵抗域における抵抗安定性の優れたポ
リマー組成物。2. The polymer component has a nitrogen adsorption specific surface area (N 2 S
A) is 60 to 125 m 2 / g, and the hardness of the granulated particles is 2.0 to 9.
0 g / particle, carbon black having a characteristic of toluene color transmittance of 90% or more, and a specific resistance of 10 4 to
A polymer composition having excellent resistance stability in a high resistance region of 10 10 Ω · cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09397498A JP3743739B2 (en) | 1998-03-23 | 1998-03-23 | Polymer composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09397498A JP3743739B2 (en) | 1998-03-23 | 1998-03-23 | Polymer composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11269403A true JPH11269403A (en) | 1999-10-05 |
| JP3743739B2 JP3743739B2 (en) | 2006-02-08 |
Family
ID=14097385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09397498A Expired - Fee Related JP3743739B2 (en) | 1998-03-23 | 1998-03-23 | Polymer composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3743739B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005092970A1 (en) * | 2004-03-25 | 2005-10-06 | Bridgestone Corporation | Rubber composition for tire tread and pneumatic tire utilizing the same |
| JP2006008820A (en) * | 2004-06-25 | 2006-01-12 | Tokai Carbon Co Ltd | Carbon black pigment for intermediate transfer belt and resin composition for intermediate transfer belt using the carbon black pigment |
| JP2006143822A (en) * | 2004-11-17 | 2006-06-08 | Bridgestone Corp | Rubber composition for tire |
-
1998
- 1998-03-23 JP JP09397498A patent/JP3743739B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005092970A1 (en) * | 2004-03-25 | 2005-10-06 | Bridgestone Corporation | Rubber composition for tire tread and pneumatic tire utilizing the same |
| US8242199B2 (en) | 2004-03-25 | 2012-08-14 | Bridgestone Company | Rubber composition for tire tread and pneumatic tire using the same |
| JP2006008820A (en) * | 2004-06-25 | 2006-01-12 | Tokai Carbon Co Ltd | Carbon black pigment for intermediate transfer belt and resin composition for intermediate transfer belt using the carbon black pigment |
| JP4596344B2 (en) * | 2004-06-25 | 2010-12-08 | 東海カーボン株式会社 | Intermediate transfer belt resin composition |
| JP2006143822A (en) * | 2004-11-17 | 2006-06-08 | Bridgestone Corp | Rubber composition for tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3743739B2 (en) | 2006-02-08 |
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