JPH08157556A - Polyurethane member - Google Patents
Polyurethane memberInfo
- Publication number
- JPH08157556A JPH08157556A JP6323778A JP32377894A JPH08157556A JP H08157556 A JPH08157556 A JP H08157556A JP 6323778 A JP6323778 A JP 6323778A JP 32377894 A JP32377894 A JP 32377894A JP H08157556 A JPH08157556 A JP H08157556A
- Authority
- JP
- Japan
- Prior art keywords
- polyol
- roller
- parts
- diphenylmethane diisocyanate
- pref
- 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.)
- Pending
Links
Landscapes
- Dry Development In Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真装置、静電記
録プリンターなどに対し好適な、ローラ状或いはブレー
ド状などの帯電，現像，転写，定着，給紙，搬送用など
の部材に用いられるポリウレタン部材に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a roller-shaped or blade-shaped member for charging, developing, transferring, fixing, feeding, conveying, etc., which is suitable for electrophotographic devices, electrostatic recording printers and the like. The present invention relates to a polyurethane member.
【０００２】[0002]
【従来の技術】従来、複写機，プリンターなどの電子写
真装置、静電記録装置には、数多くの部材が用いられ、
これらは電子写真プロセスのなかで帯電，現像，転写，
定着，給紙，搬送，トナー層形成，トナークリーニング
などの多様な役割を果たしている。これらのプロセスに
おいて装置の設計許容範囲を広げるために、給紙，搬送
ローラ及びトナークリーニングブレードにおいては高耐
磨耗性及び低硬度が要求され、種々のポリウレタン部材
が開発されている。また、感光体等の被帯電体に接触さ
せることにより、被帯電体を帯電させるために用いられ
る導電ローラ、或いは潜像を保持した感光体等に非磁性
一成分現像剤を供給し、感光体の潜像に該現像剤を付着
させて潜像を可視化するために用いられる現像ローラ、
或いは上記感光体上に可視化された顕像を用紙などの記
録媒体等に転写するために用いられる転写ローラ、或い
は上記現像ローラ表面に非磁性一成分現像剤層を形成す
るために用いられるトナー形成ブレードなどの導電性部
材においても、種々のポリウレタン部材が開発されてい
る。2. Description of the Related Art Conventionally, many members have been used in electrophotographic devices such as copying machines and printers, and electrostatic recording devices.
These are electrification, development, transfer,
It plays various roles such as fixing, feeding, conveying, toner layer formation, and toner cleaning. In order to widen the design allowable range of the apparatus in these processes, high abrasion resistance and low hardness are required for the sheet feeding, conveying roller and toner cleaning blade, and various polyurethane members have been developed. Further, the non-magnetic one-component developer is supplied to a conductive roller used for charging the charged body or a photosensitive body holding a latent image by bringing the charged body such as a photosensitive body into contact with the charged body. Developing roller used for visualizing the latent image by attaching the developer to the latent image of
Alternatively, a transfer roller used to transfer the visualized image visualized on the photoreceptor to a recording medium such as paper, or a toner used to form a non-magnetic one-component developer layer on the surface of the developing roller. Various polyurethane members have also been developed for conductive members such as blades.
【０００３】[0003]
【発明が解決しようとする課題】例えば、従来の帯電ロ
ーラに用いられるポリウレタン部材では、低硬度な材料
ほど感光体とのニップ幅を大きくとれ、均一な帯電性が
得られるので軟らかい材料が求められるが、これを達成
するために例えばポリウレタン材料に可塑剤を配合する
ことがあるが、時間がたつに伴いその可塑剤がウレタン
材料表面に移行し、感光体を汚染したり或いはその粘着
性のために長期保存中に帯電部材と感光体が密着してし
まうなどの弊害が生じることがある。また、従来の現像
ローラに用いられるポリウレタン部材でも低硬度な材料
ほど感光体とのニップ幅を大きくとれ、トナーを多く感
光体上の潜像に付着させることが得られるので、軟らか
い材料が求められるが、これを達成するために例えば、
高分子量のポリエーテルポリオールを用いたポリウレタ
ン材料ではその反応完結性の低下により感光体への汚
染、或いは表面粘着性のため現像部材と感光体とが密着
してしまうなどの問題が生じることがある。For example, in a polyurethane member used for a conventional charging roller, a softer material is required because a material having a lower hardness can have a larger nip width with the photoconductor and can obtain a uniform charging property. However, in order to achieve this, for example, a plasticizer may be blended with a polyurethane material, but with the passage of time, the plasticizer migrates to the surface of the urethane material, contaminates the photoreceptor, or due to its adhesiveness. In particular, during long-term storage, the charging member and the photoreceptor may come into close contact with each other. Further, even in the polyurethane member used in the conventional developing roller, a material having a lower hardness can have a larger nip width with the photoconductor and can adhere a large amount of toner to the latent image on the photoconductor, so that a soft material is required. But to achieve this, for example,
A polyurethane material using a high-molecular weight polyether polyol may cause a problem such as contamination of the photoconductor due to deterioration of the reaction completion property, or adhesion of the developing member and the photoconductor due to surface tackiness. .
【０００４】そこで、この発明は、感光体や記録媒体を
汚染することがなく、また該感光体や記録媒体と密着す
ることもなく、さらに低硬度でかつ耐磨耗性などの耐久
性に優れたポリウレタン部材及び導電性を備えたポリウ
レタン部材を提供することを目的とする。Therefore, the present invention does not contaminate the photoconductor or the recording medium, does not adhere to the photoconductor or the recording medium, has a low hardness and is excellent in durability such as abrasion resistance. Another object of the present invention is to provide a polyurethane member and a polyurethane member having conductivity.
【０００５】[0005]
【課題を解決するための手段】上述の目的を達成するた
め、この発明は、疎水性ポリオールと液状のジフェニル
メタンジイソシアネートとからなるものであり、また疎
水性ポリオールと液状のジフェニルメタンジイソシアネ
ートと導電性物質とからなり、導電性を備えたものであ
る。To achieve the above object, the present invention comprises a hydrophobic polyol and liquid diphenylmethane diisocyanate, and further comprises a hydrophobic polyol, liquid diphenylmethane diisocyanate and a conductive substance. And has conductivity.
【０００６】[0006]
【作用】この発明では、感光体や記録媒体を汚染するこ
とがなく、また感光体や記録媒体と密着することもなく
なる。また、低硬度でかつ耐磨耗性などの耐久性に優れ
る。According to the present invention, the photoconductor and the recording medium are not contaminated and the photoconductor and the recording medium are not brought into close contact with each other. Also, it has low hardness and excellent durability such as abrasion resistance.
【０００７】[0007]
【実施例】以下にこの発明の実施例を説明すると、第１
の発明に係るポリウレタン部材は、疎水性ポリオールと
液状のジフェニルメタンジイソシアネートとからなるも
のであり、その形状は特に限定されるものではないが、
例えば、ローラ形状，プレート形状，ブロック形状，球
状等の種々の形状とすることができる。通常はローラ形
状，プレート形状で使用される。また、エラストマー或
いは発泡体のどちらであっても構わない。EXAMPLES Examples of the present invention will be described below.
The polyurethane member according to the invention is composed of a hydrophobic polyol and liquid diphenylmethane diisocyanate, and its shape is not particularly limited,
For example, various shapes such as a roller shape, a plate shape, a block shape, and a spherical shape can be used. Usually, it is used in roller shape or plate shape. Further, either elastomer or foam may be used.
【０００８】第２の発明に係るポリウレタン部材は、疎
水性ポリオールと液状のジフェニルメタンジイソシアネ
ートと導電性物質とからなり、導電性を備えたものであ
り、形状については第１の発明と同様のことが言えると
ともに、エラストマー或いは発泡体のどちらであっても
構わない。The polyurethane member according to the second invention is made of a hydrophobic polyol, a liquid diphenylmethane diisocyanate and a conductive substance, and has conductivity, and the shape is the same as that of the first invention. It can be said that either elastomer or foam may be used.
【０００９】本発明で用いられる疎水性ポリオールとし
ては、ポリオレフィンポリオール又はシリコーンポリオ
ール，フッ素ポリオール，ヒマシ油系ポリオール，ダイ
マー酸ポリオール或いはそれらの混合物が用いられる。
ポリオールの官能基数としては２〜４が好ましい。また
分子量としては５００〜１００００が、好ましくは２０
００〜８０００がよい。この範囲より小さいと得られる
ポリウレタンは硬すぎかつ耐磨耗性が低下し、またこの
範囲より大きいとポリオールの粘度が高すぎ注型ができ
ないので好ましくない。ポリオレフィンポリオールとし
ては、ポリイソプレンポリオール、ポリブタジエンポリ
オール，或いはそれらのスチレン，アクリロニトリル共
重合体及びそれらの水添物を挙げることができる。さら
に、物性の低下を引き起こすことなく粘度を下げ、注型
性を向上させる目的で、これら疎水性ポリオールにポリ
テトラメチレンエーテルグリコールを混合しても良い。
ポリテトラメチレンエーテルグリコールとしては、通常
のポリテトラメチレンエーテルグリコールの他にそのメ
チレン基にメチル基のようなアルキル基などの置換基を
グラフトさせたもの或いはその主錯にプロピレンオキサ
イドなどのアルキレンオキサイドを共重合させたものも
使用できる。イソシアネートとして、液状のジフェニル
メタンジイソシアネートが用いられる。液状のジフェニ
ルメタンジイソシアネートとしては、カルボジイミド変
性ジフェニルメタン−４，４′ジイソシアネート或いは
ウレトンイミン変性ジフェニルメタン−４，４′ジイソ
シアネート或いは粗製ジフェニルメタンジイソシアネー
ト（クルードＭＤＩ或いはポリメリックＭＤＩとも呼ば
れる）或いはそれらの混合物が好ましく用いられる。イ
ソシアネートの官能基数は２を越えて５まで、好ましく
は２．２〜４なるイソシアネートが適当である。この範
囲より小さいと得られるポリウレタンは接触物を汚染さ
せたり、接触物と密着することがあり、またこの範囲よ
り大きいともろくなるので好ましくない。ポリオールと
イソシアネートの配合比率は、ポリオール中の水酸基に
対するイソシアネート基の比は０．７〜２．０、好まし
くは０．９〜１．５になるように調整することが適当で
ある。この範囲より小さいと得られるポリウレタンは接
触物を汚染させる或いは接触物と密着する或いは耐磨耗
性が低下することがあり、またこの範囲より大きいと硬
くなるので好ましくない。As the hydrophobic polyol used in the present invention, a polyolefin polyol, a silicone polyol, a fluorine polyol, a castor oil type polyol, a dimer acid polyol or a mixture thereof is used.
The number of functional groups of the polyol is preferably 2 to 4. The molecular weight is 500 to 10,000, preferably 20.
The range of 00-8000 is preferable. If it is less than this range, the polyurethane obtained is too hard and the abrasion resistance is lowered, and if it is more than this range, the viscosity of the polyol is too high to allow casting, which is not preferable. Examples of the polyolefin polyol include polyisoprene polyol, polybutadiene polyol, styrene and acrylonitrile copolymers thereof, and hydrogenated products thereof. Further, polytetramethylene ether glycol may be mixed with these hydrophobic polyols for the purpose of lowering the viscosity without lowering the physical properties and improving the castability.
Examples of the polytetramethylene ether glycol include, in addition to ordinary polytetramethylene ether glycol, those in which a substituent such as an alkyl group such as a methyl group is grafted on the methylene group or an alkylene oxide such as propylene oxide is added to the main complex thereof. A copolymerized product can also be used. Liquid diphenylmethane diisocyanate is used as the isocyanate. As the liquid diphenylmethane diisocyanate, carbodiimide modified diphenylmethane-4,4 'diisocyanate, uretonimine modified diphenylmethane-4,4' diisocyanate, crude diphenylmethane diisocyanate (also called crude MDI or polymeric MDI) or a mixture thereof is preferably used. An isocyanate having a functional group number of more than 2 and up to 5, preferably 2.2 to 4, is suitable. If it is less than this range, the resulting polyurethane may undesirably contaminate the contacted product or adhere to the contacted product, and if it exceeds this range, it becomes brittle. The blending ratio of the polyol and the isocyanate is appropriately adjusted so that the ratio of the isocyanate group to the hydroxyl group in the polyol is 0.7 to 2.0, preferably 0.9 to 1.5. If the ratio is less than this range, the resulting polyurethane may contaminate the contacted product, may adhere to the contacted product, or may have reduced abrasion resistance.
【００１０】上記ポリオールとイソシアネートからなる
発泡体状のポリウレタン部材としては、発泡体表皮を研
磨して部材表面が泡状の形態になっている状態或いは、
いわゆるインテグラルスキンタイプの発泡体で部材内部
は発泡体だが、部材表面はエラストマーになっている状
態どちらでも構わない。The foamed polyurethane member composed of the above polyol and isocyanate has a state in which the surface of the member is foamed by polishing the skin of the foam, or
It is a so-called integral skin type foam, and the inside of the member is a foam, but the surface of the member may be elastomer.
【００１１】発泡体の製造方法としては、化学発泡，或
いは物理発泡など通常の方法が用いられる。また、イン
テグラルスキンフォームにおいても、通常のインテグラ
ルスキンフォーム成型法が適用される。すなわち、適当
な整泡力を有するシリコーン系界面活性剤とともにポリ
オールとイソシアネートを強力に撹拌混合し、気泡を反
応混合物中に取り込み、内部は泡を巻き込んだまま硬化
する一方、表面付近の泡は消泡し適当なスキン層を有す
るように反応調整された反応混合物を温度調整された金
型に注入することによって得られる。このようにして得
られた発泡体の密度は、スキン層でない部分で０．０２
〜０．９ｇ／cm3 好ましくは０．１〜０．７ｇ／cm3 で
ある。As a method for producing the foam, a usual method such as chemical foaming or physical foaming is used. Further, in the integral skin foam as well, the usual integral skin foam molding method is applied. That is, a polyol and an isocyanate are strongly stirred and mixed together with a silicone-based surfactant having an appropriate foam-controlling power, air bubbles are taken into the reaction mixture, and the inside is cured while the air bubbles are involved, while the air bubbles near the surface are erased. It is obtained by injecting a reaction mixture prepared by foaming and having a proper skin layer into a temperature-controlled mold. The density of the foam thus obtained is 0.02 in the portion not in the skin layer.
˜0.9 g / cm 3 and preferably 0.1 to 0.7 g / cm 3 .
【００１２】本発明のポリウレタン部材を帯電或いは現
像，転写用部材として使用するためには、中抵抗領域の
導電性を有する必要があるが、導電性を発現させるため
には、導電性物質の添加が必要である。添加すべき導電
性物質としては、例えばファーネス系，チャンネル系，
サーマル系或いは主に塗料・インク用向けの表面処理さ
れたカーボン粒子，粉体或いは金属，金属酸化物粒子，
粉体などのフィラーが用いられる。また、アルカリ金属
或いはアルカリ土類金属，４級アンモニウムイオンなど
の陽イオン及び過ハロゲン酸或いは硝酸，硫酸イオンな
どの陰イオン物質或いは電荷移動錯体などを用いてもよ
い。さらにこれら導電性物質は混合物として使用しても
構わない。In order to use the polyurethane member of the present invention as a member for charging, developing or transferring, it is necessary to have conductivity in the medium resistance region, but in order to develop conductivity, addition of a conductive substance is required. is necessary. Examples of the conductive substance to be added include furnace type, channel type,
Surface-treated carbon particles, powder or metal, metal oxide particles for thermal systems or mainly for paints and inks,
A filler such as powder is used. Further, an alkali metal or alkaline earth metal, a cation such as a quaternary ammonium ion, and an anionic substance such as perhalogen acid, nitric acid, or a sulfate ion, or a charge transfer complex may be used. Furthermore, these conductive materials may be used as a mixture.
【００１３】これら導電性物質を添加して得られた導電
性ポリウレタン部材の体積抵抗率は、１０3 〜１０
11（Ω・cm）に調整することが好ましい。この範囲より
低い場合、導電性ポリウレタン部材を帯電ローラ或いは
現像ローラとして使用した場合リークを起こし易く、ま
たこの範囲より高い場合、両ローラともかぶりを起こし
易い。The volume resistivity of the conductive polyurethane member obtained by adding these conductive materials is 10 3 to 10 3.
It is preferable to adjust to 11 (Ω · cm). If it is lower than this range, leakage tends to occur when the conductive polyurethane member is used as a charging roller or a developing roller, and if it is higher than this range, fogging is likely to occur on both rollers.
【００１４】以上述べた方法で得られたポリウレタン部
材は、低汚染性で低密着性かつ低硬度で良好な耐磨耗性
などの特性を有し従来の問題点を解決することができ
る。上記説明は、電子写真装置などに用いられるポリウ
レタン部材について述べてきたが、これに限らず、非汚
染性，非密着性，低硬度，耐磨耗性を要求される部材に
広く使用することができる。The polyurethane member obtained by the method described above has characteristics such as low contamination, low adhesion, low hardness and good abrasion resistance, and can solve the conventional problems. The above description has described the polyurethane member used in the electrophotographic apparatus and the like, but the present invention is not limited to this, and it can be widely used for members that require non-contamination, non-adhesion, low hardness, and abrasion resistance. it can.
【００１５】以下に実施例，比較例を示して本発明を具
体的に説明するが、本発明は下記に限定されるものでは
ない。The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited to the following.
【００１６】実施例１ 官能基数２．３６、分子量２８００のポリイソプレンポ
リオール１００部を真空で３０分減圧脱法した後、官能
基数３．１、ＮＣＯ％が３１．７の粗製ジフェニルメタ
ンジイソシアネート１２．７部（ＮＣＯ／ＯＨ＝１．０
８に設定）、ジブチルチンジラウレート０．００１部を
添加し、やはり減圧脱法しつつ３分間撹拌した後、予め
外径８mmのシャフトがセットされ、９０℃に予熱した内
径２０mmの筒形モールドに流し込み、９０℃で１６時間
キュアを行い、脱型した後研磨し、長さ２５０mm、外径
１８mmのローラを得た。Example 1 100 parts of polyisoprene polyol having a number of functional groups of 2.36 and a molecular weight of 2800 was vacuum-removed for 30 minutes under vacuum, and then 12.7 parts of crude diphenylmethane diisocyanate having a number of functional groups of 3.1 and an NCO% of 31.7. (NCO / OH = 1.0
8)), 0.001 part of dibutyltin dilaurate was added, and after stirring for 3 minutes while depressurizing again, the shaft having an outer diameter of 8 mm was set in advance and poured into a cylindrical mold having an inner diameter of 20 mm preheated to 90 ° C. Curing was carried out at 90 ° C. for 16 hours, and after removing the mold, polishing was carried out to obtain a roller having a length of 250 mm and an outer diameter of 18 mm.
【００１７】実施例２ 実施例１と同様のポリイソプレンポリオール５０部と官
能基数２．０、分子量２０００のメチレン基にメチル基
をグラフトさせたポリテトラメチレンエーテルグリコー
ル５０部を真空で３０分減圧脱法しながら混合すること
と、実施例１と同様の粗製ジフェニルメタンジイソシア
ネート１３．４部（ＮＣＯ／ＯＨ＝１．０８に設定）を
用いた以外は実施例１と同様にしてローラを得た。Example 2 50 parts of the same polyisoprene polyol as in Example 1 and 50 parts of polytetramethylene ether glycol in which a methyl group was grafted to a methylene group having a functional number of 2.0 and a molecular weight of 2000 were vacuum desorbed for 30 minutes. A roller was obtained in the same manner as in Example 1 except for mixing and using 13.4 parts of crude diphenylmethane diisocyanate similar to that of Example 1 (set to NCO / OH = 1.08).
【００１８】実施例３ 実施例１と同様のポリイソプレンポリオール１００部
に、実施例１と同様の粗製ジフェニルメタンジイソシア
ネート１２．７部（ＮＣＯ／ＯＨ＝１．０８に設定）、
シリコーン界面活性剤を２部、ジブチルチンジラウレー
ト０．００１部を添加し、ダブル撹拌型混合機にて２分
間撹拌した後、予め外径８mmのシャフトがセットされ、
４０℃に予熱された内径１８mmの筒形モールドに流し込
み、６０℃で１６時間キュアを行い、脱型し、最外層厚
みが２００μｍのスキン層を有し内部の密度が０．５ｇ
／cm3 の発泡体である実施例１で得られたローラと同形
のインテグラルスキンタイプのローラを得た。Example 3 100 parts of the same polyisoprene polyol as in Example 1 and 12.7 parts of crude diphenylmethane diisocyanate as in Example 1 (set to NCO / OH = 1.08),
After adding 2 parts of silicone surfactant and 0.001 part of dibutyltin dilaurate and stirring for 2 minutes with a double stirring type mixer, a shaft having an outer diameter of 8 mm was set in advance,
It is poured into a tubular mold with an inner diameter of 18 mm that has been preheated to 40 ° C, cured at 60 ° C for 16 hours, and then released from the mold.
An integral skin type roller having the same shape as that of the roller obtained in Example 1, which is a foamed product of 1 cm 3 / cm 3 , is obtained.
【００１９】実施例４ アセチレンブラックを３．１３部添加する以外は実施例
１と同様にしてローラを得た。Example 4 A roller was obtained in the same manner as in Example 1 except that 3.13 parts of acetylene black was added.
【００２０】実施例５ 官能基数２．３、分子量５９００のポリイソプレンポリ
オール１００部、実施例１と同様の粗製ジフェニルメタ
ンジイソシアネート５．９部（ＮＣＯ／ＯＨ＝１．０８
に設定）、アセチレンブラックを２．９部を用いた以外
は実施例１と同様にしてローラを得た。Example 5 100 parts of polyisoprene polyol having a number of functional groups of 2.3 and a molecular weight of 5900, 5.9 parts of crude diphenylmethane diisocyanate similar to that of Example 1 (NCO / OH = 1.08)
Roller) was obtained in the same manner as in Example 1 except that 2.9 parts of acetylene black was used.
【００２１】実施例６ 官能基数２．２、分子量５４００の水添ポリイソプレン
ポリオール１００部、実施例１と同様の粗製ジフェニル
メタンジイソシアネート５．９部（ＮＣＯ／ＯＨ＝１．
０８に設定）、アセチレンブラック２．９部を用いた以
外は実施例１と同様にしてローラを得た。Example 6 100 parts of hydrogenated polyisoprene polyol having a functional number of 2.2 and a molecular weight of 5400, and 5.9 parts of crude diphenylmethane diisocyanate similar to that of Example 1 (NCO / OH = 1.
(Set to 08) and 2.9 parts of acetylene black was used to obtain a roller in the same manner as in Example 1.
【００２２】実施例７ 実施例１と同様のポリイソプレンポリオール１００部、
官能基数２．６、ＮＣＯ％が３１．１の粗製ジフェニル
メタンジイソシアネート１２．７部（ＮＣＯ／ＯＨ＝
１．０８に設定）、アセチレンブラックを３．１部を用
いた以外は実施例１と同様にしてローラを得た。Example 7 100 parts of polyisoprene polyol as in Example 1,
12.7 parts of crude diphenylmethane diisocyanate having a functionality of 2.6 and an NCO% of 31.1 (NCO / OH =
A roller was obtained in the same manner as in Example 1 except that 3.1 parts of acetylene black was used.
【００２３】実施例８ 実施例１と同様のポリイソプレンポリオール１００部、
ＮＣＯ％が２９．１のカルボジイミド変性ジフェニルメ
タン−４，４′ジイソシアネート１３．４部（ＮＣＯ／
ＯＨ＝１．０８に設定）、アセチレンブラック３．１部
を用いた以外は実施例１と同様にしてローラを得た。Example 8 100 parts of polyisoprene polyol as in Example 1,
Carbodiimide-modified diphenylmethane-4,4'-diisocyanate having an NCO% of 29.1 13.4 parts (NCO /
A roller was obtained in the same manner as in Example 1 except that OH = 1.08) and 3.1 parts of acetylene black were used.
【００２４】実施例９ アセチレンブラックを３．１部添加する以外は実施例２
と同様にしてローラを得た。Example 9 Example 2 except that 3.1 parts of acetylene black is added.
A roller was obtained in the same manner as.
【００２５】実施例１０ Ｎ，Ｎビス（２−ヒドロキシエチル）−Ｎ−アルキル−
Ｎ−メチルアンモニウムパークロレイトを０．６部添加
する以外は実施例２と同様にしてローラを得た。Example 10 N, N Bis (2-hydroxyethyl) -N-alkyl-
A roller was obtained in the same manner as in Example 2 except that 0.6 part of N-methylammonium perchlorate was added.
【００２６】実施例１１ アセチレンブラックを３．１部添加する以外は実施例３
と同様にしてローラを得た。Example 11 Example 3 except that 3.1 parts of acetylene black was added.
A roller was obtained in the same manner as.
【００２７】比較例１ 分子量３００のポリイソプレンポリオール１００部、実
施例１と同様の粗製ジフェニルメタンジイソシアネート
１１３．１部（ＮＣＯ／ＯＨ＝１．０８に設定）、アセ
チレンブラックを５．９部を用いた以外は実施例４と同
様にしてローラを得た。Comparative Example 1 100 parts of a polyisoprene polyol having a molecular weight of 300, 113.1 parts of crude diphenylmethane diisocyanate similar to that used in Example 1 (NCO / OH = 1.08), and 5.9 parts of acetylene black were used. A roller was obtained in the same manner as in Example 4 except for the above.
【００２８】比較例２ 分子量１３０００のポリイソプレンポリオール１００
部、実施例１と同様の粗製ジフェニルメタンジイソシア
ネート０．０９部（ＮＣＯ／ＯＨ＝１．０８に設定）、
アセチレンブラックを２．８部を用いた以外は実施例１
と同様にしてローラを得ようとしたが、粘度が高すぎて
注型ができずローラは製作できなかった。Comparative Example 2 Polyisoprene polyol 100 having a molecular weight of 13,000
Parts, 0.09 parts of crude diphenylmethane diisocyanate as in Example 1 (set to NCO / OH = 1.08),
Example 1 except that 2.8 parts of acetylene black was used.
An attempt was made to obtain a roller in the same manner as, but the viscosity was too high to cast and the roller could not be manufactured.
【００２９】比較例３ 実施例１と同様のポリイソプレンポリオール１００部、
実施例１と同様の粗製ジフェニルメタンジイソシアネー
ト７．０部（ＮＣＯ／ＯＨ＝０．６に設定）、アセチレ
ンブラック３．０部を用いた以外は実施例１と同様にし
てローラを得た。Comparative Example 3 100 parts of the same polyisoprene polyol as in Example 1,
A roller was obtained in the same manner as in Example 1 except that 7.0 parts of crude diphenylmethane diisocyanate (set to NCO / OH = 0.6) and 3.0 parts of acetylene black similar to those in Example 1 were used.
【００３０】比較例４ 実施例１と同様のポリイソプレンポリオール１００部、
実施例１と同様の粗製ジフェニルメタンジイソシアネー
ト２９．４部（ＮＣＯ／ＯＨ＝２．５に設定）、アセチ
レンブラック３．６部を用いた以外は実施例１と同様に
してローラを得た。Comparative Example 4 100 parts of the same polyisoprene polyol as in Example 1,
A roller was obtained in the same manner as in Example 1 except that 29.4 parts of crude diphenylmethane diisocyanate similar to that of Example 1 (set to NCO / OH = 2.5) and 3.6 parts of acetylene black were used.
【００３１】比較例５ 実施例１と同様のポリイソプレンポリオール１００部、
トリレンジイソシアネート（Ｔ−８０）８．３部（ＮＣ
Ｏ／ＯＨ＝１．０８に設定）、アセチレンブラック３．
０部を用いた以外は実施例１と同様にしてローラを得
た。Comparative Example 5 100 parts of the same polyisoprene polyol as in Example 1,
Tolylene diisocyanate (T-80) 8.3 parts (NC
O / OH = 1.08), acetylene black 3.
A roller was obtained in the same manner as in Example 1 except that 0 part was used.
【００３２】上記のローラに関し、以下のテストを行っ
た。結果を表１に示す。The following tests were conducted on the above roller. The results are shown in Table 1.
【００３３】[0033]
【表１】 [Table 1]
【００３４】表１中の感光体汚染については、ローラと
感光体ドラムを接触させた状態で、５５℃、８５％ＲＨ
の環境下に５日間放置した後、室温にて画像出しを行
い、汚染による画像異常がないか評価した。また、感光
体密着については、ローラと感光体ドラムを密着させた
状態で、５５℃、８５％ＲＨの環境下に５日間放置した
後、ローラと感光体ドラムの密着がないかを評価した。
さらに、耐磨耗性については、外径２５０mmの磨耗評価
用ドラムに２８０ｇの加重にてローラを押しつけ、スリ
ップ比１％にて所定の時間回転させ、試験後の磨耗量及
びローラ表面状態を観察した。Regarding the contamination of the photosensitive member in Table 1, the roller and the photosensitive drum are in contact with each other at 55 ° C. and 85% RH.
After being left in the environment of 5 days, the image was displayed at room temperature and evaluated for image abnormality due to contamination. Regarding the contact of the photoconductor with the roller, after the roller and the photoconductor drum were in close contact with each other and left for 5 days in an environment of 55 ° C. and 85% RH, it was evaluated whether the roller and the photoconductor drum were in contact.
For wear resistance, press the roller against a wear evaluation drum with an outer diameter of 250 mm with a load of 280 g and rotate it for a predetermined time at a slip ratio of 1% to observe the wear amount and the roller surface condition after the test. did.
【００３５】[0035]
【発明の効果】この発明は、疎水性ポリオールと液状の
ジフェニルメタンジイソシアネートとからなるポリウレ
タン部材であり、感光体或いは記録媒体に対する汚染性
及び密着性がなく、低硬度でかつ耐磨耗性の優れたもの
となる。また、帯電或いは現像，転写用部材として使用
するためには導電性を有する必要があるが、この発明で
は、疎水性ポリオールと液状のジフェニルメタンジイソ
シアネートと導電性物質とからなり、導電性を備え、感
光体などに対する汚染性及び密着性がなく、低硬度でか
つ耐磨耗性の優れたものが得られる。INDUSTRIAL APPLICABILITY The present invention is a polyurethane member composed of a hydrophobic polyol and liquid diphenylmethane diisocyanate, has no stain and adhesion to a photoreceptor or a recording medium, has a low hardness and is excellent in abrasion resistance. Will be things. Further, in order to be used as a charging, developing, or transferring member, it is necessary to have conductivity, but in the present invention, it is composed of a hydrophobic polyol, liquid diphenylmethane diisocyanate, and a conductive substance, and has conductivity, It is possible to obtain a product having low hardness and excellent wear resistance, which is free from contamination and adhesion to the body.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０３Ｇ 15/08 ５０１ Ｄ 15/16 １０３ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location G03G 15/08 501 501 D 15/16 103
Claims (2)
タンジイソシアネートとからなることを特徴とするポリ
ウレタン部材。1. A polyurethane member comprising a hydrophobic polyol and liquid diphenylmethane diisocyanate.
タンジイソシアネートと導電性物質とからなり、導電性
を備えたことを特徴とするポリウレタン部材。2. A polyurethane member comprising a hydrophobic polyol, liquid diphenylmethane diisocyanate and a conductive substance, and having conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323778A JPH08157556A (en) | 1994-12-01 | 1994-12-01 | Polyurethane member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6323778A JPH08157556A (en) | 1994-12-01 | 1994-12-01 | Polyurethane member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08157556A true JPH08157556A (en) | 1996-06-18 |
Family
ID=18158520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6323778A Pending JPH08157556A (en) | 1994-12-01 | 1994-12-01 | Polyurethane member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08157556A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11199643A (en) * | 1998-01-09 | 1999-07-27 | Asahi Denka Kogyo Kk | Production of conductive urethane resin |
| US5978639A (en) * | 1997-05-02 | 1999-11-02 | Bridgestone Corporation | Intermediate transfer member and intermediate transfer device |
| JP2006301512A (en) * | 2005-04-25 | 2006-11-02 | Bando Chem Ind Ltd | Developing member for electrophotographic apparatus |
| JP2008020900A (en) * | 2006-06-13 | 2008-01-31 | Canon Inc | Developing roller, electrophotographic process cartridge, and electrophotographic apparatus |
| JP2008275669A (en) * | 2007-04-25 | 2008-11-13 | Fuji Xerox Co Ltd | Elastic roller for image forming apparatuses, method of manufacturing elastic roller for image forming apparatuses, process cartridge, and image forming apparatus |
| JP2009173806A (en) * | 2008-01-25 | 2009-08-06 | Bridgestone Corp | Water-cut-off polyurethane foam |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS636012A (en) * | 1986-06-26 | 1988-01-12 | Nippon Telegr & Teleph Corp <Ntt> | Mixture for splicing cable |
| JPH02138363A (en) * | 1988-11-18 | 1990-05-28 | Mitsubishi Kasei Corp | Conductive resin composition |
| JPH0364313A (en) * | 1989-08-03 | 1991-03-19 | Idemitsu Petrochem Co Ltd | Polyurethane form |
| JPH03187732A (en) * | 1989-12-18 | 1991-08-15 | Bando Chem Ind Ltd | Preparation of polyurethane roller with low hardness and electric conductivity |
| JPH0425560A (en) * | 1990-05-21 | 1992-01-29 | Chuo Gosei Kk | Production of conductive thermosetting polyurethane resin |
| JPH0616766A (en) * | 1992-07-03 | 1994-01-25 | Furukawa Electric Co Ltd:The | Liquid polymer composition |
| JPH06136084A (en) * | 1992-10-21 | 1994-05-17 | Nhk Spring Co Ltd | Flexible closed cell polyurethane foam |
| JPH06256453A (en) * | 1993-02-08 | 1994-09-13 | Bayer Ag | Rigid hydrophobic polyurethane |
| JPH07258376A (en) * | 1994-02-03 | 1995-10-09 | Idemitsu Petrochem Co Ltd | Composition for roll and roll made therefrom |
-
1994
- 1994-12-01 JP JP6323778A patent/JPH08157556A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS636012A (en) * | 1986-06-26 | 1988-01-12 | Nippon Telegr & Teleph Corp <Ntt> | Mixture for splicing cable |
| JPH02138363A (en) * | 1988-11-18 | 1990-05-28 | Mitsubishi Kasei Corp | Conductive resin composition |
| JPH0364313A (en) * | 1989-08-03 | 1991-03-19 | Idemitsu Petrochem Co Ltd | Polyurethane form |
| JPH03187732A (en) * | 1989-12-18 | 1991-08-15 | Bando Chem Ind Ltd | Preparation of polyurethane roller with low hardness and electric conductivity |
| JPH0425560A (en) * | 1990-05-21 | 1992-01-29 | Chuo Gosei Kk | Production of conductive thermosetting polyurethane resin |
| JPH0616766A (en) * | 1992-07-03 | 1994-01-25 | Furukawa Electric Co Ltd:The | Liquid polymer composition |
| JPH06136084A (en) * | 1992-10-21 | 1994-05-17 | Nhk Spring Co Ltd | Flexible closed cell polyurethane foam |
| JPH06256453A (en) * | 1993-02-08 | 1994-09-13 | Bayer Ag | Rigid hydrophobic polyurethane |
| JPH07258376A (en) * | 1994-02-03 | 1995-10-09 | Idemitsu Petrochem Co Ltd | Composition for roll and roll made therefrom |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5978639A (en) * | 1997-05-02 | 1999-11-02 | Bridgestone Corporation | Intermediate transfer member and intermediate transfer device |
| JPH11199643A (en) * | 1998-01-09 | 1999-07-27 | Asahi Denka Kogyo Kk | Production of conductive urethane resin |
| JP2006301512A (en) * | 2005-04-25 | 2006-11-02 | Bando Chem Ind Ltd | Developing member for electrophotographic apparatus |
| JP2008020900A (en) * | 2006-06-13 | 2008-01-31 | Canon Inc | Developing roller, electrophotographic process cartridge, and electrophotographic apparatus |
| JP2008275669A (en) * | 2007-04-25 | 2008-11-13 | Fuji Xerox Co Ltd | Elastic roller for image forming apparatuses, method of manufacturing elastic roller for image forming apparatuses, process cartridge, and image forming apparatus |
| JP2009173806A (en) * | 2008-01-25 | 2009-08-06 | Bridgestone Corp | Water-cut-off polyurethane foam |
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