JPH11116806A - Silicone rubber composition and fixation roll - Google Patents
Silicone rubber composition and fixation rollInfo
- Publication number
- JPH11116806A JPH11116806A JP9276914A JP27691497A JPH11116806A JP H11116806 A JPH11116806 A JP H11116806A JP 9276914 A JP9276914 A JP 9276914A JP 27691497 A JP27691497 A JP 27691497A JP H11116806 A JPH11116806 A JP H11116806A
- Authority
- JP
- Japan
- Prior art keywords
- silicone rubber
- alumina
- parts
- rubber composition
- ppm
- 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
Landscapes
- Fixing For Electrophotography (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の技術分野】本発明は、熱伝導性シリコーンゴム
組成物に係わり、さらに詳しくは、低硬度で熱伝導性と
耐熱性に優れたシリコーンゴム組成物であって、電子写
真機器のトナー定着ロールの被覆材として用いた場合に
長期的に安定した画像を得ることが可能なシリコーンゴ
ム組成物を提供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermally conductive silicone rubber composition, and more particularly, to a silicone rubber composition having low hardness and excellent thermal conductivity and heat resistance, which is used for fixing toner in electrophotographic equipment. An object of the present invention is to provide a silicone rubber composition capable of obtaining a long-term stable image when used as a coating material for a roll.
【０００２】[0002]
【発明の技術的背景とその問題点】シリコーンゴムは、
電気絶縁性、耐熱性、耐候性、難燃性に優れており、複
写機やレーザービームプリンターの定着部の定着ロール
や加圧ロールの被覆材として用いられてきた。特に最近
は、カラーコピーの普及に伴い定着ロールにも低硬度化
が求められ、従来の金属またはフッ素樹脂では対応しき
れなくなり熱伝導性シリコーンゴムの上にフッ素樹脂を
被覆するタイプが多く採用されている。ここで用いられ
るシリコーンゴムは、低硬度で高い熱伝導性が要求さ
れ、さらには、常時 150℃から 200℃の高温にさらされ
るため耐熱性や低圧縮永久ひずみ性が要求される。この
シリコーンゴムとしては、特開平３−221982号公報、特
公昭62−45993 号公報、実公平６−43820 号公報などで
提案されているものが用いられてきた。これら、従来か
ら用いられてきたシリコーンゴムは、充填剤として、シ
リカ、アルミナ、マグネシアなどが配合されているもの
である。しかしながら、シリカは、熱伝導性が低く高充
填した場合に低硬度化できないという問題がある。ま
た、マグネシアは、空気中の湿気により表面が水和され
シリコーンゴムの耐熱性が低下する問題がある。更に、
アルミナは、原因は不明であるが低圧縮永久ひずみ化が
できにくい問題があった。Technical background of the invention and its problems Silicone rubber is
It has excellent electrical insulation, heat resistance, weather resistance, and flame retardancy, and has been used as a coating material for a fixing roll or a pressure roll of a fixing unit of a copying machine or a laser beam printer. In particular, recently, with the spread of color copying, the hardness of the fixing roll has also been required to be low, and a type in which a fluororesin is coated on a thermally conductive silicone rubber, which cannot be achieved with conventional metals or fluororesins, has been widely adopted. ing. The silicone rubber used here is required to have low hardness and high thermal conductivity, and furthermore, to be constantly exposed to a high temperature of 150 ° C. to 200 ° C., to be required heat resistance and low compression set. As the silicone rubber, those proposed in JP-A-3-221982, JP-B-64-25993, and JP-B-6-43820 have been used. These conventionally used silicone rubbers contain silica, alumina, magnesia or the like as a filler. However, silica has a problem that it has a low thermal conductivity and cannot be reduced in hardness when highly filled. In addition, magnesia has a problem that the surface is hydrated by moisture in the air and the heat resistance of the silicone rubber is reduced. Furthermore,
Although the cause of alumina is unknown, it has been difficult to reduce the compression set.
【０００３】[0003]
【発明の目的】本発明は、上記従来技術の課題に鑑み案
出されたものであり、低硬度で熱伝導性に優れ、且つ耐
熱性と低圧縮永久ひずみ性にも優れ、定着ロールの被覆
材として好適に用いられるシリコーンゴム組成物の提供
を目的とするものである。SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems of the prior art, and has a low hardness, excellent thermal conductivity, excellent heat resistance and low compression set, and a coating of a fixing roll. It is intended to provide a silicone rubber composition suitably used as a material.
【０００４】[0004]
【発明の構成】本発明者は、上記課題に対する定着ロー
ル被覆に適したシリコーンゴム組成物を提供すべく鋭意
検討を重ねた結果、加熱硬化型シリコーンゴムに対し特
定のアルミナを配合することが極めて有効であることを
見出し、本発明を完成するに至った。即ち本発明は、加
熱硬化型シリコーンゴム 100重量部に対し、ナトリウム
含有量が 50ppm以下であり、粒子径が５〜50μｍのアル
ミナを20〜 500重量部配合したことを特徴とするシリコ
ーンゴム組成物、並びに上記シリコーンゴム組成物を被
覆材として用いたことを特徴とする定着ロールである。The present inventors have conducted intensive studies to provide a silicone rubber composition suitable for coating the fixing roll to solve the above-mentioned problems. As a result, it has been found that it is extremely difficult to add a specific alumina to the heat-curable silicone rubber. They have found that they are effective and have completed the present invention. That is, the present invention provides a silicone rubber composition characterized in that 20 to 500 parts by weight of alumina having a sodium content of 50 ppm or less and a particle diameter of 5 to 50 μm are blended with respect to 100 parts by weight of a heat-curable silicone rubber. And a fixing roll using the silicone rubber composition as a coating material.
【０００５】[0005]
【発明の実施の形態】以下に本発明について詳細に説明
する。本発明に使用する加熱硬化型シリコーンゴムと
は、一般的に用いられている加熱硬化型シリコーンゴム
であれば特に限定されず、ベースポリマーとなるポリオ
ルガノシロキサンとシリカ粉末、添加剤、硬化剤等から
なるが、シリカ粉末、添加剤は含有していなくても良
い。ベースポリマーのポリオルガノシロキサンとは、 平均単位式：Ｒ１ ａＳｉＯ（４−ａ）／２ （式中、Ｒ１は置換または非置換の一価の炭化水素基
を、a は1.98から2.02の範囲の数を示す）で示され、主
として直鎖状のものが用いられるが、その一部が分岐鎖
状、三次元構造を形成していてもよく、また、単独重合
体、共重合体またはそれらの混合物であってもよい。こ
のポリオルガノシロキサンのケイ素原子に結合する置換
または非置換の一価の炭化水素基としては、例えばメチ
ル基、エチル基、プロピル基のようなアルキル基；ビニ
ル基、アリル基、ブタジエニル基のようなアルケニル
基；フェニル基、キセニル基、ナフチル基のようなシク
ロアルケニル基；ベンジル基のようなアリキルアリール
基；トリル基、キシリル基のようなアルキルアリール基
等の非置換の炭化水素基やクロロメチル基、3,3,3 −ト
リフルオロプロピル基等の置換炭化水素基が例示され
る。これらのケイ素原子に結合する一価の炭化水素基と
しては、主にメチル基が用いられ、耐熱性や加工性の点
から、93モル％以上がメチル基であることが好ましい。
また、架橋基として、ビニル基を有していることが好ま
しく、機械的強度と架橋性の点から、有機基の全数に対
して 0.001〜５％含有していてもよく、特に0.02〜２％
の範囲が好ましい。なお、ポリオルガノシロキサンの分
子鎖末端としては、水酸基、アルコキシ基、または、ト
リオルガノシリル基が例示され、トリオルガノシリル基
がより好ましい。このトリオルガノシリル基としては、
トリメチルシリル基、ジメチルビニルシリル基、メチル
フェニルビニルシリル基、メチルジフェニルシリル基等
が例示される。上記ポリオルガノシロキサンの平均重合
度は、1000〜20000 の範囲にあり、好ましくは3000〜15
000 、特に好ましくは5000〜10000 である。この重合度
が小さすぎると十分な機械的強度が得られにくく、逆に
大きすぎると系への配合が困難になる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. The heat-curable silicone rubber used in the present invention is not particularly limited as long as it is a generally used heat-curable silicone rubber, and a polyorganosiloxane serving as a base polymer and silica powder, an additive, a curing agent, etc. , But need not contain silica powder or additives. The polyorganosiloxane of the base polymer is represented by an average unit formula: R 1 a SiO (4-a) / 2 (wherein R 1 is a substituted or unsubstituted monovalent hydrocarbon group, and a is from 1.98 to 2.02) The number of the range is shown), and a linear one is mainly used, but a part thereof may be branched or form a three-dimensional structure, and a homopolymer, a copolymer or A mixture thereof may be used. The substituted or unsubstituted monovalent hydrocarbon group bonded to the silicon atom of the polyorganosiloxane includes, for example, an alkyl group such as a methyl group, an ethyl group and a propyl group; a vinyl group, an allyl group and a butadienyl group. Alkenyl groups; cycloalkenyl groups such as phenyl, xenyl and naphthyl groups; arylalkyl groups such as benzyl groups; unsubstituted hydrocarbon groups such as alkylaryl groups such as tolyl and xylyl groups, and chloromethyl And substituted hydrocarbon groups such as 3,3,3-trifluoropropyl group. As the monovalent hydrocarbon group bonded to the silicon atom, a methyl group is mainly used, and from the viewpoint of heat resistance and workability, it is preferable that 93 mol% or more is a methyl group.
Further, as a cross-linking group, it is preferable to have a vinyl group, and from the viewpoint of mechanical strength and cross-linking property, it may be contained in an amount of 0.001 to 5% based on the total number of organic groups, and particularly preferably 0.02 to 2%.
Is preferable. In addition, as a molecular chain terminal of the polyorganosiloxane, a hydroxyl group, an alkoxy group, or a triorganosilyl group is exemplified, and a triorganosilyl group is more preferable. As this triorganosilyl group,
Examples thereof include a trimethylsilyl group, a dimethylvinylsilyl group, a methylphenylvinylsilyl group, and a methyldiphenylsilyl group. The average degree of polymerization of the polyorganosiloxane is in the range of 1,000 to 20,000, preferably 3,000 to 15,000.
000, particularly preferably 5,000 to 10,000. If the degree of polymerization is too small, it is difficult to obtain a sufficient mechanical strength, while if it is too large, it is difficult to mix the compound into the system.
【０００６】シリカ粉末は、低硬度のゴム硬化物を得た
い場合には配合しないほうが良いが、高強度などが要求
される場合には使用しても良い。本発明では、一般にシ
リコーンゴム等の配合に使用されているフュームドシリ
カ、湿式シリカ、焼成シリカ等の公知のものが使用され
るが、特に、限定されるものではない。これらの微粉末
状シリカ系充填剤は、このまま使用してもよく、また、
オルガノシロキサン、ポリオルガノシロキサン、ヘキサ
オルガノジシラザンなどにより表面処理されているもの
を使用してもよく、またこれらの処理剤とインプロセス
で反応させてもよい。このシリカ粉末の配合量は、特に
限定される物ではないが、強度や加工性をよくするため
には、ポリオルガノシロキサン 100重量部に対して１〜
200 重量部程度、好ましくは、５〜60重量部程度が好ま
しい。[0006] Silica powder should not be blended if a low-hardness rubber cured product is desired, but may be used if high strength is required. In the present invention, known materials such as fumed silica, wet silica, and calcined silica generally used for compounding silicone rubber and the like are used, but are not particularly limited. These finely divided silica-based fillers may be used as they are,
Those surface-treated with organosiloxane, polyorganosiloxane, hexaorganodisilazane or the like may be used, or may be reacted with these treating agents in-process. The amount of the silica powder is not particularly limited, but in order to improve strength and processability, 1 to 100 parts by weight of the polyorganosiloxane.
About 200 parts by weight, preferably about 5 to 60 parts by weight is preferred.
【０００７】硬化剤は、ゴム弾性体を得るための反応機
構に応じて適宜に選択されるものである。その反応機構
としては、有機過酸化物加硫剤による架橋方法と付加反
応による方法などが知られており、その反応機構によっ
て、硬化触媒もしくは架橋剤との好ましい組み合わせが
決まることは周知のとおりである。有機過酸化物による
架橋方法の場合は、硬化触媒としては、ベンゾイルペル
オキシド、ジクミルペルオキシド、クミル−ｔ−ブチル
ペルオキシド、2,5 −ジメチル−2,5 −ジ−ｔ−ブチル
ペルオキシヘキサン、ジ−ｔ−ブチルペルオキシド、な
どの各種の有機過酸化物加硫剤が用いられ、特に金属に
対する腐食性の点から、ジクミルペルオキシド、クミル
−ｔ−ブチルペルオキシド、2,5 −ジメチル−2,5 −ジ
−ｔ−ブチルペルオキシヘキサン、ジ−ｔ−ブチルペル
オキシドが好ましい。なお、これらの有機過酸化物加硫
剤は１種または２種以上の混合物として用いられる。有
機過酸化物の配合量は、ポリオルガノシロキサンベース
ポリマー 100重量部に対して、0.05〜15重量部の範囲が
好ましい。有機過酸化物の配合量が、0.05重量部未満で
は、加硫が充分に行われず、15重量部を越えて配合して
もそれ以上の格別の効果がないばかりか、得られたシリ
コーンゴム成形体の物性に悪影響を与えることがあるか
らである。付加反応を適用する場合、硬化剤としては、
硬化用塩化白金酸、白金オレフィン錯体、白金ビニルシ
ロキサン錯体、白金カーボン、白金トリフェニルフォス
フィン錯体、などの白金系触媒が用いられ、架橋剤とし
てケイ素原子に結合した水素原子が１分子中に少なくて
も平均２個を越える数を有するオルガノポリシロキサン
が用いられる。硬化剤のうち、硬化用触媒の配合量はポ
リオルガノシロキサンベースポリマー） 100重量部に対
して、白金原子量で１〜1000ppm の範囲が好ましい。硬
化用触媒の配合量が、白金原子の量として１ppm 未満で
は、充分に硬化が進行せず、また 1000ppmを越えても特
に硬化速度の向上などが期待できない。また、架橋剤の
配合量は、ポリオルガノシロキサンベースポリマー中の
アルケニル基に対して、架橋剤中のケイ素原子に結合し
た水素原子が、 0.5〜4.0 個となるような量が好まし
く、さらに好ましくは11.0〜3.0 個となるような量であ
る。水素原子の量が 0.5個未満である場合は、組成物中
の硬化が充分に進行せずに、硬化後の組成物の硬度が低
くなり、また水素原子の量が 4.0個を越えると硬化後の
組成物の物理的特性と耐熱性が低下する。The curing agent is appropriately selected according to the reaction mechanism for obtaining the rubber elastic body. As the reaction mechanism, a crosslinking method with an organic peroxide vulcanizing agent and a method by an addition reaction are known, and it is well known that a preferable combination with a curing catalyst or a crosslinking agent is determined by the reaction mechanism. is there. In the case of a crosslinking method using an organic peroxide, the curing catalyst may be benzoyl peroxide, dicumyl peroxide, cumyl-t-butyl peroxide, 2,5-dimethyl-2,5-di-t-butylperoxyhexane, di- Various organic peroxide vulcanizing agents such as t-butyl peroxide and the like are used. In particular, dicumyl peroxide, cumyl-t-butyl peroxide, 2,5-dimethyl-2,5- Di-t-butylperoxyhexane and di-t-butyl peroxide are preferred. In addition, these organic peroxide vulcanizing agents are used as one kind or as a mixture of two or more kinds. The amount of the organic peroxide is preferably in the range of 0.05 to 15 parts by weight based on 100 parts by weight of the polyorganosiloxane base polymer. If the compounding amount of the organic peroxide is less than 0.05 parts by weight, the vulcanization is not sufficiently performed, and if the compounding amount exceeds 15 parts by weight, not only no further special effect is obtained, but also the obtained silicone rubber molding is obtained. This is because it may adversely affect the physical properties of the body. When applying an addition reaction, as a curing agent,
Platinum catalysts such as chloroplatinic acid for curing, platinum olefin complex, platinum vinyl siloxane complex, platinum carbon, platinum triphenylphosphine complex, etc. are used. However, an organopolysiloxane having an average number exceeding two is used. Among the curing agents, the compounding amount of the curing catalyst is preferably in the range of 1 to 1000 ppm in terms of platinum atomic weight based on 100 parts by weight of the polyorganosiloxane base polymer. If the amount of the curing catalyst is less than 1 ppm in terms of the amount of platinum atoms, curing will not proceed sufficiently, and if it exceeds 1000 ppm, no particular improvement in curing speed can be expected. The amount of the crosslinking agent is preferably such that the number of hydrogen atoms bonded to silicon atoms in the crosslinking agent is from 0.5 to 4.0 with respect to the alkenyl groups in the polyorganosiloxane base polymer, and more preferably. The quantity is 11.0 to 3.0. When the amount of hydrogen atoms is less than 0.5, curing in the composition does not proceed sufficiently, and the hardness of the composition after curing becomes low. The physical properties and heat resistance of the composition are reduced.
【０００８】本発明の組成物には、上記成分以外に目的
に応じて従来から一般的に用いられている、粉砕石英、
ケイソウ土などのシリカ系充填材や低硬度化のためにジ
メチルシリコーンオイルや加工性向上のために加工助
剤、各種の添加剤、例えば酸化チタン、酸化鉄、酸化セ
リウム、酸化バナジウム、酸化クロム等の金属酸化物、
顔料、耐熱剤、難燃性付与剤などを本発明組成物の特性
が損なわれない範囲で添加することができる。[0008] In addition to the above-mentioned components, the composition of the present invention may further include, for example, ground quartz,
Silica-based filler such as diatomaceous earth, dimethyl silicone oil for low hardness, processing aid for improving workability, various additives such as titanium oxide, iron oxide, cerium oxide, vanadium oxide, chromium oxide, etc. Metal oxides,
A pigment, a heat-resistant agent, a flame-retardant-imparting agent and the like can be added as long as the properties of the composition of the present invention are not impaired.
【０００９】本組成物の特徴である充填剤のアルミナ
は、ナトリウム含有量と粒子径が本発明の特徴的なとこ
ろである。従来からあるアルミナは、ナトリウム含有量
が数千ppm であり、また低ソーダアルミナといわれるも
のでも数百ppm であった。これらのアルミナを用いたシ
リコーンゴムでは、長期的な耐熱性や圧縮永久ひずみ率
の大幅な悪化が見られた。ナトリウム含有率 50ppm以下
から急激に耐熱性の悪化が改善され 10ppm以下では配合
しないものとの差がなくなった。The filler, which is a feature of the present composition, is characterized by its sodium content and particle size. Conventional alumina has a sodium content of several thousand ppm, and even a so-called low soda alumina has a concentration of several hundred ppm. Silicone rubbers using these aluminas showed significant deterioration in long-term heat resistance and compression set. The deterioration of heat resistance was rapidly improved from the sodium content of 50 ppm or less, and there was no difference from the case where the sodium content was not added at 10 ppm or less.
【００１０】また、粒子径は、低硬度化に重要であり、
５μｍ以上で有効となる。５μｍより小さいとゴム硬度
が大幅に上昇する結果であった。さらに、粒子径が、50
μｍを超えたものではシリコーンゴムの強度が著しく低
下した。好ましい粒子径は、10〜30μｍである。これら
アルミナの商品化されているものとしては、住友化学工
業（株）製、スミコランダム ＡＡ−１８などがある。
アルミナは、そのまま用いてもよいが、シラン系、チタ
ネート系のカップリング剤、ジメチルポリシロキサンオ
イル、ステアリン酸等で表面処理したものを用いても良
い。アルミナの配合量は、熱硬化性シリコーンゴム 100
重量部に対して20〜500 重量部、さらには50〜400 重量
部が好ましい。配合量が少ないと目的とする耐熱性が得
られず、多すぎると強度や加工性が著しく低下する。[0010] The particle size is important for lowering the hardness.
It is effective at 5 μm or more. When the diameter is smaller than 5 μm, the rubber hardness is significantly increased. Furthermore, when the particle size is 50
If it exceeds μm, the strength of the silicone rubber is remarkably reduced. The preferred particle size is 10 to 30 μm. Examples of commercialized aluminas include Sumikoundum AA-18 manufactured by Sumitomo Chemical Co., Ltd.
Alumina may be used as it is, or may be one whose surface is treated with a silane-based or titanate-based coupling agent, dimethylpolysiloxane oil, stearic acid, or the like. The amount of alumina is 100%.
It is preferably 20 to 500 parts by weight, more preferably 50 to 400 parts by weight based on parts by weight. If the amount is too small, the desired heat resistance cannot be obtained, and if it is too large, the strength and workability are significantly reduced.
【００１１】本発明のシリコーンゴム組成物は、上記し
た成分を常温で均一に混合することにより得ることがで
きるが、必要により、まず硬化剤以外の成分をプラネタ
リーミキサーやニーダー等で 100〜200 ℃の範囲で１〜
４時間熱処理した後、有機過酸化物を添加、混合しても
よい。The silicone rubber composition of the present invention can be obtained by uniformly mixing the above-mentioned components at room temperature. If necessary, components other than a curing agent are first mixed with a planetary mixer or a kneader to obtain a silicone rubber composition. Within 1 ° C
After heat treatment for 4 hours, an organic peroxide may be added and mixed.
【００１２】本発明のシリコーンゴム組成物は、熱伝導
性等が要求される用途に好適に用いられ、特に常法によ
り被覆硬化させることにより、定着ロールとされ、極め
て良好な性能を示す。The silicone rubber composition of the present invention is suitably used for applications requiring thermal conductivity and the like, and is particularly formed into a fixing roll by coating and curing by a conventional method, and exhibits extremely good performance.
【００１３】[0013]
【発明の効果】本発明のシリコーンゴム組成物は、低硬
度で低圧縮永久ひずみ性、熱伝導性、耐熱性に優れるの
で、定着ロール被覆材として用いた時に長期的に安定し
た画像を得ることができる。As described above, the silicone rubber composition of the present invention has low hardness, low compression set, excellent heat conductivity, and excellent heat resistance, so that a long-term stable image can be obtained when used as a fixing roll coating material. Can be.
【００１４】[0014]
【実施例】以下、実施例により本発明を更に具体的に、
説明するが、本発明はこれらに限定されるものではな
い。なお、以下の例において部は重量部である。 実施例１ (CH3)2SiO 単位99.9モル％、(CH3)(CH2=CH)SiO単位0.12
モル％からなり、末端がジメチルビニルシリル基で封鎖
された、重合度6000のポリオルガノシロキサン100 部
と、ナトリウム含有量５ppm 、平均粒子径20μｍのアル
ミナ 350部、ビニルトリエトキシシラン１部、水酸化セ
リウム１部をニーダーミキサーで均一になるまで混練し
た。この後、 150℃で２時間加熱処理した。このシリコ
ーンゴム組成物に硬化剤としてジクミルペルオキシド
1.5部を二本ロールで均一になるまで混合してシリコー
ンゴムベースポリマーを得た。このシリコーンゴムベー
スポリマーを 170℃で10分間プレス加硫を行い、硬化シ
リコーンゴムシートを得た。このシリコーンゴムシート
について、JIS K 6301に従い物理特性（硬さ、耐熱性、
圧縮永久ひずみ性）を評価した。また、熱伝導率を（Sh
otherm QTM-DII迅速熱伝導率計）で測定した。 実施例２ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナの量を 150部に変更した以外は同様にサンプルを調
製し評価を行なった。 実施例３ 実施例１のシリコーンゴムコンパウンドにおいて、ビニ
ルトリエトキシシランを配合しなかった以外は同様にサ
ンプルを調製し評価を行なった。 実施例４ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナとしてナトリウム含有量30ppm のものを使用した以
外は同様にサンプルを調製し評価を行なった。 実施例５ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナとして粒子径10μｍのものを使用した以外は同様に
サンプルを調製し評価を行なった。 実施例６ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナの量を 250部とし、さらに、粒子径５μｍの粉砕石
英を 100部配合した以外は同様にサンプルを調製し評価
を行なった。EXAMPLES Hereinafter, the present invention will be described more specifically by way of Examples.
Although described, the present invention is not limited to these. In the following examples, parts are parts by weight. Example 1 (CH 3 ) 2 SiO unit 99.9 mol%, (CH 3 ) (CH 2 = CH) SiO unit 0.12
100 parts by weight of a polyorganosiloxane having a degree of polymerization of 6000 and a sodium content of 5 ppm, an average particle diameter of 20 μm, 350 parts of alumina, 1 part of vinyltriethoxysilane, One part of cerium was kneaded with a kneader mixer until uniform. Thereafter, heat treatment was performed at 150 ° C. for 2 hours. Dicumyl peroxide is used as a curing agent in this silicone rubber composition.
1.5 parts were mixed with two rolls until uniform to obtain a silicone rubber base polymer. This silicone rubber base polymer was press-vulcanized at 170 ° C. for 10 minutes to obtain a cured silicone rubber sheet. The physical properties (hardness, heat resistance,
Compression set) was evaluated. In addition, the thermal conductivity (Sh
otherm QTM-DII rapid thermal conductivity meter). Example 2 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that the amount of alumina was changed to 150 parts. Example 3 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that vinyltriethoxysilane was not blended. Example 4 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that alumina having a sodium content of 30 ppm was used. Example 5 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that alumina having a particle diameter of 10 μm was used. Example 6 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that the amount of alumina was 250 parts and 100 parts of ground quartz having a particle diameter of 5 μm was added.
【００１５】比較例１ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナの代わりに粒子径５μｍの粉砕石英を 250部使用し
た以外は同様にサンプルを調製し評価を行なった。 比較例２ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナの代わりに粒子径２μｍの超低活性酸化マグネシウ
ムを 300部使用した以外は同様にサンプルを調製し評価
を行なった。 比較例３ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナとしてナトリウム含有量200ppmで粒子径12μｍの球
状アルミナを 350部使用した以外は同様にサンプルを調
製し評価を行なった。 比較例４ 実施例１のシリコーンゴムコンパウンドにおいて、アル
ミナとして粒子径２μｍのものを使用した以外は同様に
サンプルを調製し評価を行なった。これらの結果を表１
に示す。Comparative Example 1 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that 250 parts of crushed quartz having a particle diameter of 5 μm were used instead of alumina. Comparative Example 2 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that 300 parts of ultra-low-activity magnesium oxide having a particle diameter of 2 μm was used instead of alumina. Comparative Example 3 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1, except that 350 parts of spherical alumina having a sodium content of 200 ppm and a particle diameter of 12 μm were used as the alumina. Comparative Example 4 A sample was prepared and evaluated in the same manner as in the silicone rubber compound of Example 1 except that alumina having a particle diameter of 2 μm was used. Table 1 shows these results.
Shown in
【００１６】[0016]
【表１】 [Table 1]
Claims (2)
対し、ナトリウム含有量が 50ppm以下であり、粒子径が
５〜50μｍのアルミナを20〜 500重量部配合したことを
特徴とするシリコーンゴム組成物。1. A silicone rubber composition comprising 20 to 500 parts by weight of alumina having a sodium content of 50 ppm or less and a particle diameter of 5 to 50 μm, based on 100 parts by weight of a heat-curable silicone rubber. .
被覆材として用いたことを特徴とする定着ロール。2. A fixing roll using the silicone rubber composition according to claim 1 as a coating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27691497A JP3727450B2 (en) | 1997-10-09 | 1997-10-09 | Fixing roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27691497A JP3727450B2 (en) | 1997-10-09 | 1997-10-09 | Fixing roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11116806A true JPH11116806A (en) | 1999-04-27 |
| JP3727450B2 JP3727450B2 (en) | 2005-12-14 |
Family
ID=17576155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27691497A Expired - Fee Related JP3727450B2 (en) | 1997-10-09 | 1997-10-09 | Fixing roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3727450B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004331962A (en) * | 2003-04-15 | 2004-11-25 | Dow Corning Toray Silicone Co Ltd | Addition curing type heat conductive liquid silicone rubber composition |
| JP2006336668A (en) * | 2005-05-31 | 2006-12-14 | Shin Etsu Chem Co Ltd | High heat conductive heat fixing roll or thermosetting silicone rubber composition for fixing belt, fixing roll, and fixing belt |
| US7166363B2 (en) | 2003-08-25 | 2007-01-23 | Shin-Etsu Chemical Co., Ltd. | Highly heat conductive silicone rubber composition, fixing roll and fixing belt |
| US7321746B2 (en) | 2004-03-24 | 2008-01-22 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller used in the apparatus |
| US7974563B2 (en) | 2007-11-01 | 2011-07-05 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller therein having metal core and two elastic layers with different thermal conductivities |
| US8005413B2 (en) | 2007-06-26 | 2011-08-23 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller used for image heating apparatus |
| JP2020085950A (en) * | 2018-11-16 | 2020-06-04 | コニカミノルタ株式会社 | Fixing member and image forming device including the same |
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|---|---|---|---|---|
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| JPH0297559A (en) * | 1988-10-03 | 1990-04-10 | Toshiba Silicone Co Ltd | Heat-conductive silicone composition |
| JPH04328163A (en) * | 1991-04-26 | 1992-11-17 | Shin Etsu Chem Co Ltd | Heat conductive silicone rubber composition |
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| JPH05105814A (en) * | 1991-01-24 | 1993-04-27 | Shin Etsu Chem Co Ltd | Curable silicone composition and cured product thereof |
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1997
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6320340A (en) * | 1986-07-14 | 1988-01-28 | Showa Denko Kk | Highly thermally conductive rubber/plastic composition |
| JPS63251466A (en) * | 1987-04-06 | 1988-10-18 | Shin Etsu Chem Co Ltd | Thermally conductive liquid silicone rubber composition |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004331962A (en) * | 2003-04-15 | 2004-11-25 | Dow Corning Toray Silicone Co Ltd | Addition curing type heat conductive liquid silicone rubber composition |
| JP4565491B2 (en) * | 2003-04-15 | 2010-10-20 | 東レ・ダウコーニング株式会社 | Thermally conductive addition-curable liquid silicone rubber composition |
| US7166363B2 (en) | 2003-08-25 | 2007-01-23 | Shin-Etsu Chemical Co., Ltd. | Highly heat conductive silicone rubber composition, fixing roll and fixing belt |
| US7321746B2 (en) | 2004-03-24 | 2008-01-22 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller used in the apparatus |
| JP2006336668A (en) * | 2005-05-31 | 2006-12-14 | Shin Etsu Chem Co Ltd | High heat conductive heat fixing roll or thermosetting silicone rubber composition for fixing belt, fixing roll, and fixing belt |
| US8005413B2 (en) | 2007-06-26 | 2011-08-23 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller used for image heating apparatus |
| US8224223B2 (en) | 2007-06-26 | 2012-07-17 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller used for image heating apparatus |
| US8369763B2 (en) | 2007-06-26 | 2013-02-05 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller used for image heating apparatus |
| US7974563B2 (en) | 2007-11-01 | 2011-07-05 | Canon Kabushiki Kaisha | Image heating apparatus and pressure roller therein having metal core and two elastic layers with different thermal conductivities |
| JP2020085950A (en) * | 2018-11-16 | 2020-06-04 | コニカミノルタ株式会社 | Fixing member and image forming device including the same |
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| Publication number | Publication date |
|---|---|
| JP3727450B2 (en) | 2005-12-14 |
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