JP2005036158A - Resin composition for slide member - Google Patents

Resin composition for slide member Download PDF

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JP2005036158A
JP2005036158A JP2003276756A JP2003276756A JP2005036158A JP 2005036158 A JP2005036158 A JP 2005036158A JP 2003276756 A JP2003276756 A JP 2003276756A JP 2003276756 A JP2003276756 A JP 2003276756A JP 2005036158 A JP2005036158 A JP 2005036158A
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sliding
resin composition
group
crosslinked
agent
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JP4367905B2 (en
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Masayuki Honda
雅之 本多
Masayuki Takahashi
正幸 高橋
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Shin Etsu Polymer Co Ltd
Shin Etsu Chemical Co Ltd
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Shin Etsu Chemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition for a slide member capable of smoothly sliding without rise in slide resistance when slid repeatedly. <P>SOLUTION: This resin composition for a slide member comprises a crosslinked particle containing a sliding agent in a crosslinked molecule having a hydrocarbon group and a thermoplastic resin, wherein the sliding agent is at least one selected from a lubricant having a long chain alkyl group or a long chain unsaturated group and a silicone compound. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、車両、家電製品、建材、雑貨等の分野で幅広い用途に使用される摺動部材用樹脂組成物に関する。   The present invention relates to a resin composition for a sliding member used in a wide range of applications in the fields of vehicles, home appliances, building materials, miscellaneous goods, and the like.

自動車用ドアのガラス窓の内周等に設置されるグラスランやウエザーストリップ、あるいは建具の引き戸や窓サッシに用いられるタイト材は、雨・風等の侵入を防止して、気密性を保持し、且つ、窓ガラスや下枠レールと摺動できるようにするために、リップと呼ばれる摺動部材を具備している。従来、このリップの摺動性を向上させる(摩擦抵抗を低くする)手段として、シリコーンオイル、脂肪族アマイド等の摺動剤、あるいは溶融粘度の高い樹脂粒子をリップの構成材料に添加したり、リップを二層構造とし、その表層を硬化させる試みがなされている(例えば、特許文献1、2参照)。   Tight materials used for glass runs and weatherstrips installed on the inner periphery of glass windows of automobile doors, sliding doors and window sashes for joinery prevent rain and wind from entering, and maintain airtightness. In addition, a sliding member called a lip is provided to enable sliding with the window glass and the lower frame rail. Conventionally, as means for improving the slidability of the lip (lowering the frictional resistance), a sliding agent such as silicone oil or aliphatic amide, or resin particles having a high melt viscosity are added to the constituent material of the lip, Attempts have been made to cure the surface layer of the lip with a two-layer structure (see, for example, Patent Documents 1 and 2).

特公昭62−12262号公報Japanese Examined Patent Publication No. 62-12262 特公昭64−11238号公報Japanese Patent Publication No. 64-11238

しかしながら、上記の従来技術には、摺動部材を繰り返し摺動させると、摺動する際における摩擦抵抗が上昇して、スムーズな摺動ができなくなり、振動、異音が発生する等の問題点がある。
本発明は、かかる問題点を解決すること、すなわち、摺動部材を繰り返し摺動させても、摺動する際の摩擦抵抗が上昇せず、スムーズな摺動を行うことができる摺動部材用樹脂組成物を提供することを目的とする。
However, in the above-described conventional technology, when the sliding member is repeatedly slid, the frictional resistance at the time of sliding increases, so that smooth sliding cannot be performed, and vibration and abnormal noise are generated. There is.
The present invention solves such a problem, that is, for a sliding member that can perform smooth sliding without increasing the frictional resistance even when the sliding member is repeatedly slid. It aims at providing a resin composition.

本発明者らは、従来技術の問題点について鋭意探求した結果、摺動部材を繰り返し摺動させることによって、摺動する際の摩擦抵抗が上昇する理由は、(1)摺動部材を構成する樹脂中に単純な練り込みによって添加された摺動剤は、ブリードアウトする速度が速く、また、摺動する相手部材(ガラス、アルミ製レール等)や、相手部材との間に挟まれた雨水、土砂等の異物によって、掻き取られるため、消失しやすいこと、(2)溶融粘度の高い樹脂粒子を摺動部材の構成材料に添加した場合、摺動部材の成形時に該樹脂粒子が溶融してしまい、相手部材との接触面積を減らすのに有効な凹凸部を形成しにくいこと、及び(3)従来技術で形成された摺動部材表面の凸部は、繰り返し摺動させることによって、平坦に変形しやすいこと、であることを見出した。
さらに、本発明者らは、摺動剤を含有する架橋粒子を用いて、これを熱可塑性樹脂中に分散させることにより、摺動剤の溶融・摩滅・消失を防止し、持続性のある優れた摺動性能が得られることを発見し、かかる知見に基づき、本発明を完成させた。
As a result of earnestly searching for the problems of the prior art, the inventors of the present invention have the following reasons for increasing the frictional resistance when sliding by sliding the sliding member repeatedly: (1) configuring the sliding member The sliding agent added by simple kneading into the resin has a fast bleed-out speed, and the sliding member (glass, aluminum rail, etc.) and the rainwater sandwiched between the members Since it is scraped off by foreign matter such as earth and sand, it is easy to disappear. (2) When resin particles having a high melt viscosity are added to the constituent material of the sliding member, the resin particles are melted when the sliding member is molded. Therefore, it is difficult to form an uneven portion effective for reducing the contact area with the mating member, and (3) the convex portion on the surface of the sliding member formed by the prior art is flattened by sliding repeatedly. Easily deformed into It was found that.
Furthermore, the present inventors use crosslinked particles containing a sliding agent and disperse this in a thermoplastic resin, thereby preventing melting, abrasion and disappearance of the sliding agent, and having excellent durability. Based on this finding, the present invention has been completed.

すなわち、本発明は、炭化水素基を有する分子架橋体の中に摺動剤を含む架橋粒子を、熱可塑性樹脂に配合してなる摺動部材用樹脂組成物であって、該摺動剤が、長鎖アルキル基又は長鎖不飽和基を有する滑剤、及びシリコーン化合物から選ばれる少なくとも1種であることを特徴とする摺動部材用樹脂組成物である。   That is, the present invention is a resin composition for a sliding member obtained by blending a thermoplastic resin with crosslinked particles containing a sliding agent in a molecular crosslinked body having a hydrocarbon group, the sliding agent comprising: A resin composition for a sliding member, which is at least one selected from a lubricant having a long-chain alkyl group or a long-chain unsaturated group, and a silicone compound.

本発明の樹脂組成物は、摺動剤を樹脂中に練り込む際の作業性が良好で、製品を製造する場合に、摺動剤の分離不具合(プレートアウト、ウエルド)の発生を防止することができる。また、本発明の樹脂組成物を用いることにより、繰り返し摺動させても、摩滅しにくい凹凸部を有し、摺動性能の持続性に優れた摺動部材を得ることができる。   The resin composition of the present invention has good workability when kneading a sliding agent into the resin, and prevents the occurrence of sliding agent separation defects (plate out, weld) when manufacturing products. Can do. Further, by using the resin composition of the present invention, it is possible to obtain a sliding member having an uneven portion that is hard to wear even when repeatedly slid and having excellent sliding performance.

以下、本発明について詳細に説明する。本発明の樹脂組成物は、前記したように、所定の架橋粒子を熱可塑性樹脂に配合してなるものであるが、この熱可塑性樹脂に関しては、特に制限はなく、各種の汎用熱可塑性樹脂、特殊汎用熱可塑性樹脂、熱可塑性エラストマー、エンジニアリング樹脂、特殊エンジニアリング樹脂、生分解性樹脂等、公知の熱可塑性樹脂を用いればよい。
本発明の樹脂組成物を、例えば、前述したグラスラン、ウエザーストリップ、サッシ用気密材のリップ材料として用いて、摺動させる相手部材との良好な保持性、追従性を発現させるには、該樹脂組成物の硬度は、デュロメーターD(JIS−K7215)で、60以下の低硬度が好ましい。したがって、本発明の樹脂組成物の硬度が、かかる範囲となるような熱可塑性樹脂を選択するのがよい。
Hereinafter, the present invention will be described in detail. As described above, the resin composition of the present invention is obtained by blending predetermined crosslinked particles with a thermoplastic resin. However, the thermoplastic resin is not particularly limited, and various general-purpose thermoplastic resins, A known thermoplastic resin such as a special general-purpose thermoplastic resin, a thermoplastic elastomer, an engineering resin, a special engineering resin, or a biodegradable resin may be used.
The resin composition of the present invention is used, for example, as a lip material for the above-mentioned glass run, weather strip, and sash airtight material, in order to develop good holding properties and followability with the mating member to be slid. The hardness of the composition is durometer D (JIS-K7215), and a low hardness of 60 or less is preferable. Therefore, it is preferable to select a thermoplastic resin in which the hardness of the resin composition of the present invention falls within such a range.

上記範囲の硬度に適合する熱可塑性樹脂としては、具体的には、スチレン系、オレフィン系、塩ビ系、ウレタン系、エステル系、ポリアミド系、フッ素系、シリコーン系の各熱可塑性エラストマー、これらのブレンド物、及びこれらの共重合物を挙げることができる。さらに、これらの熱可塑性エラストマーに、汎用熱可塑性樹脂(LDPE、LLDPE、VLDPE、MDPE、HDPE、PP、GPPS、HIPS、SAN、ABS、PVC、PMMA、PET等)、特殊汎用熱可塑性樹脂(PVDC、E/VAL、アイオノマー、A/CPE/S、ASA、A/EPDM/S等)、エンジニアリング樹脂、特殊エンジニアリング樹脂を添加したものが挙げられる。   Specific examples of the thermoplastic resin suitable for the above-mentioned range of hardness include styrene-based, olefin-based, vinyl chloride-based, urethane-based, ester-based, polyamide-based, fluorine-based, and silicone-based thermoplastic elastomers, and blends thereof. And copolymers thereof. Furthermore, these thermoplastic elastomers include general-purpose thermoplastic resins (LDPE, LLDPE, VLDPE, MDPE, HDPE, PP, GPPS, HIPS, SAN, ABS, PVC, PMMA, PET, etc.), special general-purpose thermoplastic resins (PVDC, E / VAL, ionomer, A / CPE / S, ASA, A / EPDM / S, etc.), engineering resins, and special engineering resins.

近年の風潮として、自動車部材や建材のオレフィン化が進められていることから、グラスラン、ウエザーストリップ、サッシ用気密材等のリップ材には、現時点で、オレフィン系熱可塑性エラストマー(TPO)を主材にすることが最も望ましい。
オレフィン系熱可塑性エラストマーとしては、主組成がポリプロピレン系樹脂(PP)とエチレン−プロピレン−非共役ジエンゴム(EPDM)からなり、これらに硫黄、有機過酸化物、フェノール樹脂、又はヒドロシリル化架橋剤を添加して、動的にEPDMを架橋した組成物;これに、ビニル芳香族重合体ブロックと共役ジエン重合体ブロックからなる共重合体に水素添加して得られる水添ブロック共重合体、LDPE、LLDPE、VLDPE、MDPE、HDPE、EVA、EEA等のエチレン系樹脂、種々のPPを混練した組成物;ビニル芳香族重合体ブロックと共役ジエン重合体ブロックからなる共重合体に水素添加して得られる水添ブロック共重合体と、種々のPPを主成分とする組成物、特にビニル芳香族重合体がポリスチレンであるところのスチレン系熱可塑性エラストマー自体が例示される。本発明の樹脂組成物をオレフィン系とする場合は、これらのオレフィン系熱可塑性エラストマーを選択する。
Due to the recent trend of olefins in automobile parts and building materials, olefinic thermoplastic elastomer (TPO) is currently the main material for lip materials such as glass run, weatherstrips, and airtight materials for sashes. Is most desirable.
As the olefinic thermoplastic elastomer, the main composition consists of polypropylene resin (PP) and ethylene-propylene-nonconjugated diene rubber (EPDM), to which sulfur, organic peroxide, phenol resin, or hydrosilylation crosslinking agent is added A composition obtained by dynamically crosslinking EPDM; a hydrogenated block copolymer obtained by hydrogenating a copolymer comprising a vinyl aromatic polymer block and a conjugated diene polymer block; LDPE, LLDPE; , VLDPE, MDPE, HDPE, EVA, EEA, and other ethylene-based resins, compositions obtained by kneading various PP; water obtained by hydrogenating a copolymer comprising a vinyl aromatic polymer block and a conjugated diene polymer block A composition comprising a block copolymer and various PP as a main component, in particular, a vinyl aromatic polymer is a polystyrene. Styrene-based thermoplastic elastomer itself where it is down is exemplified. When the resin composition of the present invention is olefin-based, these olefin-based thermoplastic elastomers are selected.

本発明で用いられる架橋粒子は、摺動剤である長鎖アルキル基又は長鎖不飽和基を有する滑剤、あるいはシリコーン化合物を、炭化水素基を有する分子架橋体の中に含むものである。
長鎖アルキル基又は長鎖不飽和基を有する滑剤において、長鎖アルキル基又は長鎖不飽和基は、連続する炭素数が8〜30の範囲にあるものが好ましい。この連続する炭素数が8未満では、摺動性能の持続性に乏しく、逆に、炭素数が30を超えると、素原料が高価になる傾向がある。また、炭素数が100を超えると安価なポリエチレンを使うことができるが、摺動性が低下する。なお、連続する炭素数は、炭素以外との結合、例えば、エステル結合、アミド結合、ウレタン結合等を中間に挟んだ場合は、連続で数えない。
The crosslinked particles used in the present invention include a lubricant having a long-chain alkyl group or a long-chain unsaturated group as a sliding agent, or a silicone compound in a molecular crosslinked body having a hydrocarbon group.
In the lubricant having a long-chain alkyl group or a long-chain unsaturated group, the long-chain alkyl group or the long-chain unsaturated group preferably has a continuous carbon number in the range of 8 to 30. If the number of continuous carbon atoms is less than 8, the sustainability of sliding performance is poor. Conversely, if the number of carbon atoms exceeds 30, the raw material tends to be expensive. Moreover, when carbon number exceeds 100, although cheap polyethylene can be used, slidability falls. Note that the number of continuous carbon atoms is not counted continuously when a bond other than carbon, for example, an ester bond, an amide bond, a urethane bond, or the like is sandwiched between them.

長鎖アルキル基又は長鎖不飽和基を有する滑剤の具体例としては、カプリル酸、カプリン酸、ラウリン酸、ミリスチン酸、パルミチン酸、パルミトレイン酸、ステアリン酸、オレイン酸、リノール酸、リノレン酸、アラキジン酸、ベヘン酸、セトレイン酸、エルカ酸、リグノセリン酸、12−ヒドロキシオクタテカン酸、12−ヒドロキシ−9−オクタデセン酸等からなる脂肪酸類、オクチルアルコール、デシルアルコール、ラウリルアルコール、ミリスチンアルコール、セチルアルコール、ステアリルアルコール、ミリシルアルコール等からなるアルコール類、上記脂肪酸やアルコール中の長鎖アルキル基又は長鎖不飽和基を持つ脂肪酸クロライド類、アミン類、金属石鹸類、アミド類、エステル類、シラン類が挙げられる。   Specific examples of the lubricant having a long-chain alkyl group or a long-chain unsaturated group include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidin Fatty acids composed of acids, behenic acid, cetreic acid, erucic acid, lignoceric acid, 12-hydroxyoctatecanic acid, 12-hydroxy-9-octadecenoic acid, octyl alcohol, decyl alcohol, lauryl alcohol, myristic alcohol, cetyl alcohol, Alcohols such as stearyl alcohol and myricyl alcohol, fatty acid chlorides having long chain alkyl groups or long chain unsaturated groups in the above fatty acids and alcohols, amines, metal soaps, amides, esters, silanes Can be mentioned.

また、上記滑剤は、融点又は滴点が140℃以下、特に好ましくは110℃以下のものが、摺動性能の持続性、異音発生防止性に優れているため好ましい。
好ましい滑剤の具体例としては、グリセリンモノステアレート、グリセリンジステアレート、ファルパックZ−MK(日本油脂社製、商品名)、エレガンA−102(日本油脂社製、商品名)、ステアリン酸アマイド、オレイン酸アマイド、エルカ酸アマイド、Loxiol G32(コグニクスジャパン社製、商品名)、Loxiol GVPN963(コグニクスジャパン社製、商品名)が挙げられる。
In addition, the above-mentioned lubricant having a melting point or a dropping point of 140 ° C. or less, particularly preferably 110 ° C. or less is preferable because it has excellent sliding performance and noise-preventing property.
Specific examples of preferable lubricants include glycerin monostearate, glycerin distearate, Falpack Z-MK (trade name, manufactured by NOF Corporation), Elegan A-102 (trade name, manufactured by NOF Corporation), stearic acid amide. Oleic acid amide, erucic acid amide, Loxiol G32 (trade name, manufactured by Cognics Japan), and Loxiol GVPN963 (trade name, manufactured by Cognics Japan).

本発明に用いられる前記シリコーン化合物は、一般には、シリコーンオイル又はシリコーンガム(ゴム)、及びシリコーン系共重合体である。
該シリコーンオイル又はシリコーンガム(ゴム)としては、ジメチルシリコーン、メチルフェニルシリコーン、及び5mol%以下のビニル基を有するそれらのシリコーン、ハイドロジェンポリシロキサン、アルキル変性、高級脂肪酸エステル変性、フッ素変性等の変性シリコーンオイルが挙げられる。また、これらの分子量は102〜106であることが好ましい。
特には、ビニル基含有量が1mol%未満で、分子量が102〜106の鎖状ジメチルポリシロキサン(ジメチルシリコーンオイル、ガム)、鎖状メチルハイドロジェンポリシロキサン、アルキレン基を有するメチルハイドロジェンポリシロキサンが、摺動性能の持続性や耐候性の点で優れているため好ましい。
The silicone compound used in the present invention is generally a silicone oil or silicone gum (rubber), and a silicone copolymer.
Examples of the silicone oil or silicone gum (rubber) include dimethyl silicone, methylphenyl silicone, and those silicones having a vinyl group of 5 mol% or less, hydrogen polysiloxane, alkyl modification, higher fatty acid ester modification, modification by fluorine modification, etc. Examples include silicone oil. Moreover, it is preferable that these molecular weights are 10 < 2 > -10 < 6 >.
In particular, a chain dimethylpolysiloxane (dimethylsilicone oil, gum) having a vinyl group content of less than 1 mol% and a molecular weight of 10 2 to 10 6, a chain methyl hydrogen polysiloxane, a methyl hydrogen poly having an alkylene group. Siloxane is preferable because it is excellent in durability of sliding performance and weather resistance.

一方、前記シリコーン系共重合体は、シリコーンオイル又はシリコーンガム(ゴム)の所で述べた各種シリコーンと他の樹脂を共重合させたものであり、その分子量は103〜106が好ましい。このシリコーン系共重合体は、市販の共重合体を用いてもよいし、反応物を作製してもよく、具体例としては、シリコーン−アクリル共重合体「シャリーヌ」(日信化学社製、商品名)、シリコーン−オレフィン共重合体「シリコーンコンセントレート」(東レ・ダウコーニング社製、商品名)、ビニル基の含有量が0〜1mol%含有のジメチル・ビニルポリシロキサンと、不飽和基の含有量が0〜5重量%のEPDM、SBS、SISとの部分架橋物が挙げられる。シリコーン系共重合体を用いる場合は、シリコーン含有量が30重量%を超えるものが好ましく、それよりも少ないと十分な摺動性が得られないことがある。 On the other hand, the silicone copolymer is obtained by copolymerizing various silicones described in the section of silicone oil or silicone gum (rubber) with other resins, and the molecular weight is preferably 10 3 to 10 6 . As this silicone copolymer, a commercially available copolymer may be used, or a reaction product may be prepared. As a specific example, a silicone-acrylic copolymer “Charine” (manufactured by Nisshin Chemical Co., Ltd., Product name), silicone-olefin copolymer “silicone concentrate” (trade name, manufactured by Toray Dow Corning Co., Ltd.), dimethyl-vinylpolysiloxane containing 0 to 1 mol% of vinyl groups, and unsaturated groups Examples include partially crosslinked products with EPDM, SBS, and SIS having a content of 0 to 5% by weight. When a silicone copolymer is used, the silicone content is preferably more than 30% by weight, and if it is less than that, sufficient slidability may not be obtained.

前記した長鎖アルキル基又は長鎖不飽和基を有する滑剤、及びシリコーン系共重合体は、それぞれ2種以上用いてもよく、また、両者を併用することもできる。
架橋粒子中における、これらの摺動剤の好ましい含有量は、架橋粒子全組成物中に0.05〜40重量%、好ましくは0.5〜40重量%、最も好ましくは3〜40重量%である。0.05重量%未満では優れた摺動性の効果が十分に得られず、40重量%を超えると、耐摩耗性が悪くなる場合がある。
Two or more kinds of the above-mentioned lubricant having a long-chain alkyl group or a long-chain unsaturated group and a silicone copolymer may be used, or both may be used in combination.
The preferable content of these sliding agents in the crosslinked particles is 0.05 to 40% by weight, preferably 0.5 to 40% by weight, and most preferably 3 to 40% by weight in the total composition of the crosslinked particles. is there. If it is less than 0.05% by weight, the effect of excellent slidability cannot be sufficiently obtained. If it exceeds 40% by weight, the wear resistance may be deteriorated.

本発明で用いられる架橋粒子は、炭化水素基を有する分子架橋体の中に、上記摺動剤の少なくとも1種を含む粒子状物あるいは粉状物である。すなわち、この架橋粒子は、分子架橋体が有する三次元網目架橋構造の中に、上記摺動剤を閉じ込めたものである。
本発明の樹脂組成物は、このような架橋粒子を用いることによって、摺動性能に優れ、且つ、その持続性が高く、また、摺動剤の練り込み時の作業性が良好で、製品製造の際に摺動剤の分離不具合(プレートアウト、ウエルド)が発生しにくくなるという、本発明の最も特徴的な効果が得られる。また、本発明の樹脂組成物は、摺動部材を成形する際であっても、摺動剤を配合した粒子が溶融することなく、該樹脂組成物中に粒子のまま残るため、摺動部材を繰り返し摺動させても、摩滅しにくい凹凸部を形成することができる。
これらの優れた効果が得られる理由は、上記架橋粒子を用いることにより、単体の摺動剤を用いた場合に比べて、多量の摺動剤を熱可塑性樹脂に練り込めること、架橋粒子同士の融着がないことから、熱可塑性樹脂中に摺動剤を均一に分散させることができること、相手部材との接触点又はその極近傍に摺動剤を供給できること、摺動剤のブリード速度が遅延すること、及び摺動剤の保持力が高いことによるものと考えられる。
架橋粒子の大きさは、任意であり、通常は、1〜2000μm程度のものを使用すればよい。また、架橋粒子の形状も任意である。架橋粒子の大きさ、形状は、求められる製品の外観や表面粗さに応じて、適宜決定する。
The crosslinked particles used in the present invention are particulates or powders containing at least one of the above sliding agents in a molecular crosslinked body having a hydrocarbon group. That is, the crosslinked particles are obtained by confining the sliding agent in the three-dimensional network crosslinked structure of the molecular crosslinked body.
By using such crosslinked particles, the resin composition of the present invention has excellent sliding performance and high sustainability, and good workability when kneading the sliding agent. In this case, the most characteristic effect of the present invention is obtained in that it is difficult to cause a sliding agent separation defect (plate-out, weld). Further, the resin composition of the present invention is a sliding member because even when the sliding member is molded, the particles blended with the sliding agent remain in the resin composition without melting. Even if it slides repeatedly, the uneven | corrugated | grooved part which cannot be worn out can be formed.
The reason why these excellent effects can be obtained is that by using the above-mentioned crosslinked particles, a larger amount of a sliding agent can be kneaded into a thermoplastic resin than when a single sliding agent is used. Since there is no fusion, the sliding agent can be uniformly dispersed in the thermoplastic resin, the sliding agent can be supplied at or near the contact point with the counterpart member, and the bleed speed of the sliding agent is delayed. It is thought that this is due to the high retention force of the sliding agent.
The size of the crosslinked particles is arbitrary, and usually a particle having a size of about 1 to 2000 μm may be used. The shape of the crosslinked particles is also arbitrary. The size and shape of the crosslinked particles are appropriately determined according to the required appearance and surface roughness of the product.

炭化水素基を有する分子架橋体は、例えば、有機過酸化物、アゾ化合物、ヒドロシリル化架橋剤、電子線、紫外線、熱、イミド化合物、硫黄、硫黄同族体、キノンジオキシム誘導体、フェノール樹脂、プロトン酸、水、ハロゲン化金属、安定カルボニウムイオン、アルカリ金属、アルカリ水酸化物、グリニャール試薬、有機金属ハロゲン化合物、有機金属塩、有機金属化合物、イソシアネート、エポキシ化合物、カルボン酸、酸無水物、アルデヒド、アルコール、アミン、メラミン、アルコキシド等と反応する官能基と、炭化水素基を有するモノマーあるいはポリマーを架橋させて得られるものである。   The molecular crosslinked product having a hydrocarbon group is, for example, an organic peroxide, an azo compound, a hydrosilylation crosslinking agent, an electron beam, an ultraviolet ray, heat, an imide compound, sulfur, a sulfur homologue, a quinone dioxime derivative, a phenol resin, a proton. Acid, water, metal halide, stable carbonium ion, alkali metal, alkali hydroxide, Grignard reagent, organometallic halogen compound, organometallic salt, organometallic compound, isocyanate, epoxy compound, carboxylic acid, acid anhydride, aldehyde , A functional group that reacts with alcohol, amine, melamine, alkoxide, and the like, and a monomer or polymer having a hydrocarbon group is crosslinked.

オレフィン化の潮流に従ったグラスラン、ウエザーストリップ、サッシ用気密材等に適する上記分子架橋体の組成は、オレフィン系あるいはスチレン系熱可塑性エラストマーに添加した場合に、分散させやすく、密着性のあるものが好ましい。
このような分子架橋体としては、エチレン基、ブテン基、ペンテン基、ヘキセン基等の炭素数2〜12のα・オレフィン基;イソプレン基、ブタジエン基、ペンタジエン基、エチリデンノルボルネン基等の炭化水素ジエン基;スチレン基、α・メチルスチレン基、ビニルトルエン基、ジビニルベンゼン基等の芳香族ビニル化合物残基;シクロヘキサン基、ノルボルネン基等の脂肪族環状化合物残基;炭素数4〜12のアルキル基;炭素数4〜12の直鎖メチレン基;フェニル基、トリル基等のアリール基;アラルキル基等を、主鎖又は側鎖に有する三次元ポリマーが挙げられる。
そして、この分子架橋体の三次元ポリマー中のCH、CH2、及びCH3の含有量は40重量%以上、特に50〜100重量%が好適である。
The composition of the above-mentioned molecular cross-linked product suitable for glass run, weather strip, sash airtight material, etc. in accordance with the trend of olefination is easy to disperse when added to olefin-based or styrene-based thermoplastic elastomer, and has adhesiveness Is preferred.
Such molecular cross-linked products include α-olefin groups having 2 to 12 carbon atoms such as ethylene group, butene group, pentene group and hexene group; hydrocarbon dienes such as isoprene group, butadiene group, pentadiene group and ethylidene norbornene group. Group: aromatic vinyl compound residue such as styrene group, α-methylstyrene group, vinyltoluene group, divinylbenzene group; aliphatic cyclic compound residue such as cyclohexane group, norbornene group; alkyl group having 4 to 12 carbon atoms; Examples thereof include a three-dimensional polymer having a linear methylene group having 4 to 12 carbon atoms; an aryl group such as a phenyl group or a tolyl group; an aralkyl group or the like in the main chain or side chain.
Then, CH of three-dimensional polymer of the molecule crosslinked, CH 2, and CH content of 3 40% by weight or more, and particularly 50 to 100% by weight is preferred.

摺動剤の含有の確実性、オレフィン系熱可塑性エラストマーとの密着性、及び架橋粒子の製造容易性の点からは、高濃度のCH、CH2、及びCH3をもつ分子架橋体の具体的な原材料として、エチレン−プロピレン−非共役ジエン共重合体、ビニル芳香族重合体ブロックと共役ジエン重合体ブロックからなる共重合体、スチレン−ブタジエン共重合体、HDPEが挙げられる。中でも低摩擦性、耐磨耗性、汎用性の点から、スチレン40〜90重量%、ブタジエン10〜60重量%、ブテン及びエチレン0〜25重量%のスチレン−ブタジエン共重合体がよい。このブタジエン部(不飽和部)を利用して架橋する。 In terms of the certainty of the inclusion of the sliding agent, the adhesion to the olefinic thermoplastic elastomer, and the ease of production of the crosslinked particles, the specifics of the molecular crosslinked product having a high concentration of CH, CH 2 and CH 3 Examples of the raw material include an ethylene-propylene-nonconjugated diene copolymer, a copolymer composed of a vinyl aromatic polymer block and a conjugated diene polymer block, a styrene-butadiene copolymer, and HDPE. Among them, a styrene-butadiene copolymer containing 40 to 90% by weight of styrene, 10 to 60% by weight of butadiene, and 0 to 25% by weight of ethylene is preferable from the viewpoint of low friction, wear resistance, and versatility. The butadiene part (unsaturated part) is used for crosslinking.

架橋粒子の製造方法としては、架橋する官能基と炭化水素基を有するモノマーあるいはポリマーからなる原料に、摺動剤を混合してから、架橋操作を行う方法、該原料と摺動剤の混合操作と架橋操作を同時に行う方法、分子架橋体に膨潤させた後、無圧ないし加圧状態で、摺動剤を挿入する方法があるが、前者二つの方法が、簡便で、摺動剤が確実に含有される点で好ましい。
例えば、スチレン−ブタジエン共重合体からなる架橋粒子の製造方法としては、少なくとも一種類の前記摺動剤とスチレン−ブタジエン共重合体ペレットを、一旦押出機で混練して摺動剤の分散を行い、これに有機過酸化物又はヒドロシリル化剤等の架橋剤を添加し、押出機を用いて、架橋剤の分散・架橋・粒子化を行う方法がある。
As a method for producing the crosslinked particles, a method in which a sliding agent is mixed with a raw material composed of a monomer or polymer having a functional group to be crosslinked and a hydrocarbon group and then a crosslinking operation is performed, and a mixing operation of the raw material and the sliding agent is performed. And the method of simultaneously performing the crosslinking operation and the method of inserting the sliding agent under pressure or pressure after swelling in the molecular crosslinked body, but the former two methods are simple and the sliding agent is reliable. It is preferable at the point contained in.
For example, as a method for producing crosslinked particles comprising a styrene-butadiene copolymer, at least one kind of the above-mentioned sliding agent and styrene-butadiene copolymer pellets are once kneaded with an extruder to disperse the sliding agent. Further, there is a method in which a crosslinking agent such as an organic peroxide or a hydrosilylating agent is added thereto, and the crosslinking agent is dispersed, crosslinked, or granulated using an extruder.

架橋粒子を製造するための架橋操作としては、懸濁重合法、乳化重合法、溶液重合法、スラリー重合法、気相重合法、バルク重合法等で、モノマーの重合まで行い、その後の次工程で架橋してもよいし、多官能モノマー等の架橋剤を添加し、モノマーの重合と同時に架橋を行ってもよい。重合体(ポリマー)を後から架橋する方法としては、架橋剤を付着・混合させて、電子線・紫外線照射、加熱、あるいは誘電加熱を行う炉で連続式に処理を行ったり、押出機で架橋・粒子化を行う連続処理等、多くの方法がある。
また、架橋粒子を製造するための粒子化は、これらの重合方法による重合・架橋と同時に直接粒子化してもよいし、架橋したものを粉砕して粒子化してもよい。
The crosslinking operation for producing the crosslinked particles includes suspension polymerization method, emulsion polymerization method, solution polymerization method, slurry polymerization method, gas phase polymerization method, bulk polymerization method, etc., until the monomer polymerization, and then the next step Crosslinking may be carried out by adding a crosslinking agent such as a polyfunctional monomer, and crosslinking may be carried out simultaneously with the polymerization of the monomer. As a method of cross-linking the polymer (polymer) afterwards, a cross-linking agent is attached and mixed, and processed continuously in a furnace that performs electron beam / ultraviolet irradiation, heating, or dielectric heating, or cross-linking with an extruder. -There are many methods, such as continuous processing to make particles.
The particle formation for producing the crosslinked particles may be performed directly at the same time as polymerization / crosslinking by these polymerization methods, or the crosslinked particles may be pulverized into particles.

架橋粒子組成の確認は、摺動剤を含んでいない分子架橋体部分だけを単離又は選択して行う。架橋粒子が架橋構造を有しているかどうかは、固体NMR分析や各種溶剤に不溶であるかどうかで確認できる。簡易的には、摺動剤を除いた分子架橋体だけを、製品成形予定温度である180〜300℃に加熱保温したシート作製用金型に入れ、20〜150kg/cm2の圧力を1〜5分掛けることにより架橋構造の有無を判定することができる。その場合、分子架橋体が架橋構造を有していれば、シートを成形することができない。
架橋粒子が炭化水素基を有するかどうかは、IR等の化学分析で確認することができる。摺動剤を含有しているかどうかも、IR、溶剤抽出してGPC分離等してIR、NMR分析で確認することができる。なお、時間の経過や、摺動操作による製品表面の摺動剤成分の消費によって、架橋粒子内からの摺動剤の放出が進み、摺動剤の含有量が当初の添加量より少なくなる場合がある。
Confirmation of the composition of the crosslinked particles is carried out by isolating or selecting only the molecular crosslinked body portion not containing the sliding agent. Whether the crosslinked particles have a crosslinked structure can be confirmed by solid NMR analysis or whether they are insoluble in various solvents. Briefly, only the molecular cross-linked product excluding the sliding agent is placed in a mold for sheet production heated and kept at 180 to 300 ° C., which is the product molding expected temperature, and a pressure of 20 to 150 kg / cm 2 is set to 1 to 1. The presence or absence of a crosslinked structure can be determined by taking 5 minutes. In that case, if the molecular crosslinked body has a crosslinked structure, the sheet cannot be formed.
Whether or not the crosslinked particles have a hydrocarbon group can be confirmed by chemical analysis such as IR. Whether or not it contains a sliding agent can also be confirmed by IR and NMR analysis by IR, solvent extraction and GPC separation. In addition, when the sliding agent is released from the cross-linked particles due to the passage of time or the consumption of the sliding agent component on the product surface by sliding operation, the content of the sliding agent is less than the initial amount added. There is.

本発明の樹脂組成物中における架橋粒子の割合は、極少量でも、指触感でべたつきのない、さらっとした感触にして、摺動性、耐傷つき性等を改善できる場合があるが、本発明の目的である摺動性能の持続性を持たせるためには、本発明の樹脂組成物中に、5重量%以上、好ましくは5〜70重量%添加するのがよい。70重量%より多いと、本発明の樹脂組成物の流動性が悪くなる恐れがある。   Even if the ratio of the crosslinked particles in the resin composition of the present invention is a very small amount, there is a case where it is possible to improve the slidability, scratch resistance, etc. by making it feel soft and non-sticky. In order to maintain the durability of the sliding performance which is the purpose of the above, it is preferable to add 5% by weight or more, preferably 5 to 70% by weight in the resin composition of the present invention. If it is more than 70% by weight, the fluidity of the resin composition of the present invention may be deteriorated.

本発明で用いる架橋粒子には、摺動剤、炭化水素基を有する分子架橋体以外に、その目的に反しない範囲で、顔料、シリカ、カーボンブラック等の補強剤、酸化防止剤、耐候剤、熱可塑性樹脂、防徽剤、抗菌剤、難燃剤等を添加混合することができる。   In the cross-linked particles used in the present invention, in addition to a sliding agent and a molecular cross-linked product having a hydrocarbon group, a reinforcing agent such as pigment, silica, carbon black, antioxidant, weathering agent, A thermoplastic resin, an antifungal agent, an antibacterial agent, a flame retardant, and the like can be added and mixed.

本発明の樹脂組成物は、これまでに説明した熱可塑性樹脂、架橋粒子等を、タンブラー、バンバリーミキサー、スーパーミキサー、各種押出機、加圧ニーダー等を用いて混練することによって作製される。
本発明の樹脂組成物には、さらに摺動性能を高めるために、熱可塑性樹脂、架橋粒子以外に、架橋粒子中に添加することができる前記シリコーン化合物と同一のシリコーン化合物を添加するのがよい。これによって、熱可塑性樹脂中にも有効な摺動成分を分散させることになり、さらに摺動持続性が向上する。熱可塑性樹脂にシリコーン化合物を分散させる場合は、架橋粒子に担持させる場合より、一般的にブリード性(放出性)が高くなるので、熱可塑性樹脂に分散させるシリコーン化合物は、分子量が104〜106のシリコーンオイル又はシリコーンガム(ゴム)、シリコーン系共重合体がよい。また、その添加量は、熱可塑性樹脂中に5〜30重量%が好ましい。
また、本発明の樹脂組成物は、その目的に反しない範囲で、顔料、シリカ、カーボンブラック等の補強剤、酸化防止剤、耐候剤、防微剤、抗菌剤、難燃剤等を添加混合することができる。
本発明の樹脂組成物は、押出成形、射出成形、真空成形等の各種加工方法により、任意の形態の摺動部材に成形され、車両分野、建材分野、日用雑貨分野等に広く利用される。
The resin composition of the present invention is produced by kneading the thermoplastic resin, crosslinked particles, and the like described so far using a tumbler, Banbury mixer, super mixer, various extruders, a pressure kneader, or the like.
In addition to the thermoplastic resin and the crosslinked particles, the resin composition of the present invention preferably contains the same silicone compound as the silicone compound that can be added to the crosslinked particles, in addition to the thermoplastic resin and the crosslinked particles. . As a result, an effective sliding component is dispersed in the thermoplastic resin, and the sliding durability is further improved. When the silicone compound is dispersed in the thermoplastic resin, the bleedability (release property) is generally higher than when the silicone compound is supported on the crosslinked particles. Therefore, the silicone compound dispersed in the thermoplastic resin has a molecular weight of 10 4 to 10. 6 silicone oil or silicone gum (rubber), silicone copolymer is preferable. Moreover, the addition amount is preferably 5 to 30% by weight in the thermoplastic resin.
In addition, the resin composition of the present invention is added and mixed with reinforcing agents such as pigments, silica, and carbon black, antioxidants, weathering agents, anti-bacterial agents, antibacterial agents, flame retardants, and the like as long as they do not contradict the purpose. be able to.
The resin composition of the present invention is molded into a sliding member of any form by various processing methods such as extrusion molding, injection molding, vacuum molding and the like, and is widely used in the fields of vehicles, building materials, daily miscellaneous goods, and the like. .

(実施例1〜3、比較例1〜2)
(架橋粒子の作製)
表1に示した配合処方のうち、有機過酸化物を除いた原材料を、190℃に加温した二軸押出機に投入し、スクリューを回転させて、混練物ペレットを作製した。
次に、この混練物ペレットに、有機過酸化物:2,5−ジメチル−2,5−ビス(t−ブチルパーオキシ)ヘキサンを2重量部添加・撹拌して、付着させた後、200℃に加温した二軸押出機に投入し、スクリューを回転させて混練と粉砕を行い、ダイスを付けずに、シリンダーヘッドから、架橋した粒子を排出させて、粒子A、粒子B、粒子C、粒子Dを作製した。
これらの粒子を200℃の金型に入れて、5分間加熱し、さらに昇圧して100kg/cm2・5分間のプレスを行った。その結果、いずれの粒子も溶融溶着することなく粉状の状態であったことから、十分架橋していることが確認できた。
なお、表1中、TR2250(JSR社製、商品名)は、スチレン−ブタジエンブロック共重合体(SBS)を示す。
(Examples 1-3, Comparative Examples 1-2)
(Production of crosslinked particles)
Among the compounding recipes shown in Table 1, raw materials excluding organic peroxide were put into a twin-screw extruder heated to 190 ° C., and the screw was rotated to produce kneaded pellets.
Next, 2 parts by weight of organic peroxide: 2,5-dimethyl-2,5-bis (t-butylperoxy) hexane was added to the kneaded product pellets and stirred to adhere to 200 ° C. The mixture is charged into a twin-screw extruder heated to a temperature, and the screw is rotated to perform kneading and pulverization. Without attaching a die, the cross-linked particles are discharged from the cylinder head, and particles A, particles B, particles C, Particle D was produced.
These particles were placed in a 200 ° C. mold, heated for 5 minutes, further pressurized, and pressed at 100 kg / cm 2 · 5 minutes. As a result, since all the particles were in a powder state without being melt-welded, it was confirmed that the particles were sufficiently crosslinked.
In Table 1, TR2250 (trade name, manufactured by JSR Corporation) represents a styrene-butadiene block copolymer (SBS).

Figure 2005036158
Figure 2005036158

(摺動部材用樹脂組成物の作製)
表2に示す配合処方に従って、各原材料を配合し、190〜200℃に加温した二軸押出機で混練して、摺動部材用樹脂組成物のペレットを作製した(実施例1〜3、比較例1〜2)。
なお、表2中、ミラストマー7030B(三井化学社製、商品名)は、オレフィン系熱可塑性エラストマー、J−700GP(出光化学工業社製、商品名)は、ポリプロピレン、X−22−2101(信越化学工業社製、商品名)は、シリコーンマスターペレット(シリコーンガムをポリプロピレンに混練した樹脂)を示す。
(Preparation of resin composition for sliding member)
According to the formulation shown in Table 2, each raw material was blended and kneaded with a twin screw extruder heated to 190 to 200 ° C. to produce pellets of resin compositions for sliding members (Examples 1 to 3, Comparative Examples 1-2).
In Table 2, Miralastomer 7030B (trade name, manufactured by Mitsui Chemicals) is an olefin thermoplastic elastomer, J-700GP (trade name, manufactured by Idemitsu Chemical Co., Ltd.) is polypropylene, X-22-2101 (Shin-Etsu Chemical) The trade name, manufactured by Kogyo Co., Ltd., indicates a silicone master pellet (a resin obtained by kneading silicone gum in polypropylene).

Figure 2005036158
Figure 2005036158

(試験サンプル)
押出機二台をダイスに接続し、片方の押出機に上記ペレットを投入し、もう片方の押出機にミラストマー7030B(前出)のペレットを投入して、押出機190℃、ダイス200℃の条件で、二層成形を行い、表層に摺動部材用樹脂組成物の厚さが100μmとなるようにし、下層にオレフィン系熱可塑性エラストマーの厚さが1.8mmとなるようにして、各試験サンプルを作製した。この試験サンプルの表層部に対して、以下の摺動試験を行った。
(Test sample)
Two extruders are connected to a die, the above pellets are charged into one extruder, and the pellets of Miralastomer 7030B (supra) are charged into the other extruder, and the conditions of the extruder 190 ° C. and the die 200 ° C. In each of the test samples, two-layer molding was performed so that the thickness of the resin composition for the sliding member was 100 μm on the surface layer and the thickness of the olefin-based thermoplastic elastomer was 1.8 mm on the lower layer. Was made. The following sliding test was performed on the surface layer portion of the test sample.

(摺動試験)
図1に示したように、摺動試験機1を使用し、モーターによって水平可動するガラス2の下に試験サンプル3を固定し、ガラス2が可動する際、垂直方向に荷重がかかるように錘4を載せて、水平往復運動を行った。そして、ロードセル5を配置して、ガラス2の可動中(水平往復運動が初期(約50回)、5000回、10000回、15000回)における抵抗値(N)を求めた。なお、ガラス2と試験サンプル3の面が接触する面積は約500mm2、ガラス2の平均可動速度150mm/秒、荷重1.7Nの条件で摺動試験を行った。摺動試験の結果を表3に示す。
(Sliding test)
As shown in FIG. 1, a sliding test machine 1 is used, a test sample 3 is fixed under a glass 2 that is horizontally movable by a motor, and a weight is applied so that a load is applied in the vertical direction when the glass 2 moves. A horizontal reciprocating motion was performed with 4 mounted. Then, the load cell 5 was arranged, and the resistance value (N) when the glass 2 was moving (horizontal reciprocating motion was initial (about 50 times), 5000 times, 10000 times, 15000 times) was obtained. In addition, the sliding test was performed on the conditions where the surface of the glass 2 and the surface of the test sample 3 is about 500 mm 2 , the average moving speed of the glass 2 is 150 mm / sec, and the load is 1.7 N. The results of the sliding test are shown in Table 3.

Figure 2005036158
Figure 2005036158

(摺動試験の評価)
表3からわかるように、本発明の樹脂組成物を用いて作製した試験サンプルは、摺動性能、及びその持続性のいずれの点においても優れていた。
(Sliding test evaluation)
As can be seen from Table 3, the test sample prepared using the resin composition of the present invention was excellent in both sliding performance and sustainability.

摺動試験について示す概略説明図である(実施例)。It is a schematic explanatory drawing shown about a sliding test (Example).

符号の説明Explanation of symbols

1…摺動試験機
2…ガラス
3…試験サンプル
4…錘
5…ロードセル
DESCRIPTION OF SYMBOLS 1 ... Sliding tester 2 ... Glass 3 ... Test sample 4 ... Weight 5 ... Load cell

Claims (2)

炭化水素基を有する分子架橋体の中に摺動剤を含む架橋粒子を、熱可塑性樹脂に配合してなる摺動部材用樹脂組成物であって、該摺動剤が、長鎖アルキル基又は長鎖不飽和基を有する滑剤、及びシリコーン化合物から選ばれる少なくとも1種であることを特徴とする摺動部材用樹脂組成物。   A resin composition for a sliding member obtained by blending a thermoplastic resin with crosslinked particles containing a sliding agent in a molecular crosslinked body having a hydrocarbon group, wherein the sliding agent is a long chain alkyl group or A resin composition for a sliding member, which is at least one selected from a lubricant having a long-chain unsaturated group and a silicone compound. 請求項1記載の摺動部材用樹脂組成物を用いて得られた摺動部材。

A sliding member obtained using the resin composition for a sliding member according to claim 1.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009038038A1 (en) 2007-09-19 2009-03-26 Fujifilm Corporation Acetylene compound, salt thereof, condensate thereof, and composition thereof
KR20160046682A (en) * 2014-10-21 2016-04-29 삼익티에이치케이 주식회사 Composition for resin products containing oil and lubrication products using this
JP2017109859A (en) * 2015-12-18 2017-06-22 住友ゴム工業株式会社 Sheet feed roller and method for manufacturing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009038038A1 (en) 2007-09-19 2009-03-26 Fujifilm Corporation Acetylene compound, salt thereof, condensate thereof, and composition thereof
KR20160046682A (en) * 2014-10-21 2016-04-29 삼익티에이치케이 주식회사 Composition for resin products containing oil and lubrication products using this
KR101629251B1 (en) 2014-10-21 2016-06-10 삼익티에이치케이 주식회사 Composition for resin products containing oil and lubrication products using this
JP2017109859A (en) * 2015-12-18 2017-06-22 住友ゴム工業株式会社 Sheet feed roller and method for manufacturing the same

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