JPH0798873B2 - Surface treatment method for vulcanized rubber moldings - Google Patents
Surface treatment method for vulcanized rubber moldingsInfo
- Publication number
- JPH0798873B2 JPH0798873B2 JP63174949A JP17494988A JPH0798873B2 JP H0798873 B2 JPH0798873 B2 JP H0798873B2 JP 63174949 A JP63174949 A JP 63174949A JP 17494988 A JP17494988 A JP 17494988A JP H0798873 B2 JPH0798873 B2 JP H0798873B2
- Authority
- JP
- Japan
- Prior art keywords
- vulcanized rubber
- vulcanized
- rubber
- organic peroxide
- surface treatment
- 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.)
- Expired - Lifetime
Links
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、加硫ゴム成形品の表面処理方法に関する。更
に詳しくは、加硫ゴム成形品の低摩擦化ならびに非粘着
化を達成させるための表面処理方法に関する。TECHNICAL FIELD The present invention relates to a surface treatment method for a vulcanized rubber molded article. More specifically, it relates to a surface treatment method for achieving low friction and detackification of a vulcanized rubber molded article.
〔従来の技術〕および〔発明が解決しようとする課題〕 加硫ゴムは、一般に摩擦抵抗が大きくまた粘着性を有す
ることがあるため、加硫ゴム基材の有する他の好ましい
性質が十分に生かされず、使用用途に制限がみられる。
このため、加硫ゴム成形品表面の低摩擦化ならびに非粘
着化の要請が、近年とみに高まっている。[Prior Art] and [Problems to be Solved by the Invention] Vulcanized rubber generally has large frictional resistance and may have tackiness, so that other preferable properties of the vulcanized rubber base material are sufficiently utilized. However, there are restrictions on the intended use.
For this reason, demands for low friction and non-adhesion of the surface of vulcanized rubber molded products have been increasing in recent years.
加硫ゴム成形品表面の低摩擦化ならびに非粘着化のため
の従来技術としては、加硫ゴム表面を薬品により硬化処
理する方法、ポリテトラフルオロエチレンの樹脂分散液
を用いてコーティングする方法などがあるが、前者の方
法では硬化部分の化学構造が大きく変化し、その結果ゴ
ムの最大の特徴であるゴム状弾性が著しく失われるとい
う欠点がみられ、また後者の方法では噴霧塗布、刷毛塗
りなどの工程を必要とする以外に、基材との接合性も問
題となり易いなどの課題を抱えている。Conventional techniques for reducing the friction and detackifying the surface of vulcanized rubber molded products include a method of curing the vulcanized rubber surface with a chemical agent and a method of coating with a resin dispersion of polytetrafluoroethylene. However, the former method has the drawback that the chemical structure of the cured part changes significantly, and as a result the rubber-like elasticity, which is the most characteristic feature of rubber, is significantly lost, and the latter method involves spray coating, brush coating, etc. In addition to the above process, there is a problem that the bondability with the base material is likely to become a problem.
本発明は、成形品全体の弾性などゴム本来の特徴を実質
的に低下させることなく、加硫ゴム成形品表面の低摩擦
化ならびに非粘着化を達成させることを目的としてい
る。An object of the present invention is to achieve low friction and detackification of the surface of a vulcanized rubber molded product without substantially deteriorating the original characteristics of rubber such as elasticity of the entire molded product.
〔課題を解決するための手段〕 かかる本発明の目的は、表面にジアルキル型有機過酸化
物を付着させた有機過酸化物架橋加硫ゴム成形品を該有
機過酸化物分解温度に加熱する方法により達成される。[Means for Solving the Problems] The object of the present invention is to provide a method for heating an organic peroxide-crosslinked vulcanized rubber molded article having a dialkyl-type organic peroxide adhered to the surface thereof to the organic peroxide decomposition temperature. Achieved by
表面処理さるべき有機過酸化物加硫ゴム成形品は、天然
ゴムあるいは合成ゴム、例えばスチレン・ブタジエンゴ
ム、シリコーンゴム、ニトリルゴム、水素化ニトリルゴ
ム、エチレン・プロピレン系共重合ゴム（EPDM）などを
架橋可能な任意の有機過酸化物で架橋させた加硫成形品
である。Organic peroxide vulcanized rubber moldings to be surface-treated include natural rubber or synthetic rubber such as styrene / butadiene rubber, silicone rubber, nitrile rubber, hydrogenated nitrile rubber, ethylene / propylene copolymer rubber (EPDM). It is a vulcanized molded article that is crosslinked with any crosslinkable organic peroxide.
ジアルキル型有機過酸化物としては、例えばジ第３ブチ
ルパーオキサイド、第３ブチルクミルパーオキサイド、
ジクミルパーオキサイド、α，α′−ビス（第３ブチル
パーオキシ−ｍ−イソプロピル）ベンゼン、2,5−ジメ
チル−2,5−ジ（第３ブチルパーオキシ）ヘキサン、2,5
−ジメチル−2,5−ジ（第３ブチルパーオキシ）ヘキシ
ン−３などが用いられる。Examples of the dialkyl type organic peroxide include ditertiary butyl peroxide, tertiary butyl cumyl peroxide,
Dicumyl peroxide, α, α′-bis (tertiary butylperoxy-m-isopropyl) benzene, 2,5-dimethyl-2,5-di (tertiary butylperoxy) hexane, 2,5
-Dimethyl-2,5-di (tertiary butylperoxy) hexyne-3 and the like are used.
これらのジアルキル型有機過酸化物は、液状物であれば
それをそのまま使用することもできるが、好ましくは濃
度約１％以上の可溶性溶媒溶液として用いられる。その
ための溶媒としては、加硫ゴム成形品を溶解したりしな
いものが用いられるものの、成形品表面に数10μｍ程度
浸透するようにある程度加硫ゴム成形品を膨潤させるも
のが望ましい。実際には、アセトン、２−ブタノン、メ
タノール、エタノール、トルエンなどが、処理程度に応
じた溶液濃度を形成するようにして用いられる。These dialkyl type organic peroxides can be used as they are as long as they are liquid, but are preferably used as a soluble solvent solution having a concentration of about 1% or more. As a solvent therefor, a solvent which does not dissolve the vulcanized rubber molded product is used, but it is desirable to swell the vulcanized rubber molded product to some extent so that the surface of the molded product is penetrated by about several tens of μm. In practice, acetone, 2-butanone, methanol, ethanol, toluene and the like are used so as to form a solution concentration according to the degree of treatment.
表面処理は、一般に加硫ゴム成形品を室温乃至約50℃の
温度で有機過酸化物またはその有機溶媒溶液中に約１〜
60分間浸漬し、溶液で用いられた場合には風乾あるいは
予備加熱により溶媒を除去した後、有機過酸化物付着加
硫ゴム成形品を急速に加熱することにより行われる。加
熱は、表面処理さるべき加硫成形品のゴムの種類および
用いられた有機過酸化物の分解温度に応じて、約100〜3
00℃で約１分間乃至24時間、好ましくは約150〜250℃で
約10分間乃至２時間行われる。The surface treatment is generally carried out by subjecting a vulcanized rubber molded article to a temperature of room temperature to about 50 ° C. in an organic peroxide or its organic solvent solution in an amount of about 1 to 1.
It is immersed for 60 minutes, and when used as a solution, the solvent is removed by air drying or preheating, and then the organic peroxide-adhered vulcanized rubber molded product is rapidly heated. The heating is about 100 to 3 depending on the type of rubber of the vulcanized molded article to be surface-treated and the decomposition temperature of the organic peroxide used.
It is carried out at 00 ° C for about 1 minute to 24 hours, preferably at about 150 to 250 ° C for about 10 minutes to 2 hours.
加熱による有機過酸化物の分解により活性ラジカルが発
生するが、その際雰囲気中に酸素が存在するとラジカル
の再結合による消失を伴なうので不活性雰囲気下での処
理を必要とするが、処理に用いる有機過酸化物量を制御
することにより、酸素存在下での表面処理も可能とな
る。また、表面処理液中には、トリアリルイソシアヌレ
ート、トリアリルシアヌレート、N,N′−ｍ−フェニレ
ンビスマレイミド、ジアリルフタレートなどの、有機過
酸化物ラジカルによってラジカルを発生させ、ポリマー
ラジカルと共架橋する多官能性不飽和化合物を共存させ
ることもできる。Active radicals are generated by decomposition of organic peroxide by heating, but if oxygen is present in the atmosphere at this time, it is accompanied by disappearance due to recombination of radicals, so treatment in an inert atmosphere is required. By controlling the amount of organic peroxide used for the surface treatment, surface treatment in the presence of oxygen is also possible. In the surface treatment solution, radicals are generated by organic peroxide radicals such as triallyl isocyanurate, triallyl cyanurate, N, N′-m-phenylene bismaleimide, diallyl phthalate, and the radicals are generated together with the polymer radicals. A cross-linking polyfunctional unsaturated compound can also be present together.
〔作用〕および〔発明の効果〕 ジアルキル型有機過酸化物を用い、加熱して表面処理す
ることにより、加硫ゴム成形品の表層部分数μｍ〜数10
0μｍ程度が更に架橋されて高架橋密度となり、局部的
に硬化部分が形成されるものと考えられる。[Function] and [Effect of the Invention] A surface area of the vulcanized rubber molded article is several μm to several tens by heating and surface-treating the dialkyl type organic peroxide.
It is considered that about 0 μm is further cross-linked to have a high cross-linking density and a cured portion is locally formed.
これにより、加硫ゴム成形品表面の低摩擦化ならびに非
粘着化が、成形品全体のゴム本来の弾性などを実質的に
低下させることなく達成される。また、硬化部分は、そ
の組成が本質的に元のゴム組成に近くしかも一体に形成
されているため、単なるコーティング膜とは異なり、剥
離や亀裂などを生じさせない。As a result, the surface of the vulcanized rubber molded product can be reduced in friction and detackified without substantially lowering the original elasticity of the rubber of the entire molded product. In addition, since the composition of the cured part is essentially close to the original rubber composition and is integrally formed, unlike a simple coating film, peeling or cracking does not occur.
次に、実施例について本発明を説明する。 Next, the present invention will be described with reference to examples.
加硫ゴム成形品の製造 （配合物Ａ） ニトリルゴム（日本合成ゴム製品N220S） 100重量部 SRFカーボンブラック 40 ジクミルパーオキサイド ３ （配合物Ｂ） 水素化ニトリルゴム（日本ゼオン製品Zetpol 1020） 100重量部 SRFカーボンブラック 40 ジクミルパーオキサイド ３ （配合物Ｃ） EPDM（日本合成ゴム製品EP11） 100重量部 HAFカーボンブラック 50 酸化亜鉛 ５ ステアリン酸 １ ナフテン系オイル 10 ジクミルパーオキサイド ３ 上記各配合物について、170℃で10分間のプレス加硫を
行ない、100×100×2mmの加硫シートＡ、ＢまたはＣを
作製した。Manufacture of vulcanized rubber molded products (Compound A) Nitrile rubber (N220S of Japan Synthetic Rubber Product) 100 parts by weight SRF carbon black 40 Dicumyl peroxide 3 (Compound B) Hydrogenated nitrile rubber (Zetpol 1020 manufactured by Nippon Zeon) 100 Parts by weight SRF carbon black 40 dicumyl peroxide 3 (blend C) EPDM (Japan synthetic rubber product EP11) 100 parts by weight HAF carbon black 50 zinc oxide 5 stearic acid 1 naphthenic oil 10 dicumyl peroxide 3 each of the above blends Was subjected to press vulcanization at 170 ° C. for 10 minutes to produce 100 × 100 × 2 mm vulcanized sheets A, B or C.
実施例１〜２ 上記加硫シートＡを、ジクミルパーオキサイド（実施例
１）またはジ第３ブチルパーオキサイド（実施例２）の
50％アセトン溶液中に室温で10分間浸漬した後引き上
げ、室温に10分間放置した。その後、この有機過酸化物
付着加硫シートを200℃のオーブン中で30分間加熱処理
し、取り出して室温に戻した。Examples 1 to 2 The vulcanized sheet A was treated with dicumyl peroxide (Example 1) or ditertiary butyl peroxide (Example 2).
It was immersed in a 50% acetone solution at room temperature for 10 minutes, then pulled up and left at room temperature for 10 minutes. Then, this organic peroxide-adhered vulcanized sheet was heat-treated in an oven at 200 ° C. for 30 minutes, taken out, and returned to room temperature.
実施例３〜４ 実施例１〜２において、加硫シートＡの代りに加硫シー
トＢが用いられた。Examples 3-4 In Examples 1-2, the vulcanized sheet B was used instead of the vulcanized sheet A.
実施例５〜６ 実施例１〜２において、加硫シートＡの代りに加硫シー
トＣが用いられた。Examples 5-6 In Examples 1-2, the vulcanized sheet C was used instead of the vulcanized sheet A.
以上の各実施例で過酸化物処理された加硫シートについ
て、次の方法によりシート表面の動摩擦係数および粘着
力を測定した。また、加硫シートについて、180゜折り
曲げによるクラック発生の有無を観察した。得られた結
果は、後記表に示される。With respect to the vulcanized sheet treated with peroxide in each of the above examples, the dynamic friction coefficient and the adhesive force on the sheet surface were measured by the following methods. In addition, the vulcanized sheet was observed for cracks due to 180 ° bending. The results obtained are shown in the table below.
動摩擦係数：クロムメッキされた球（直径10mm）と同じ
曲率を有する接触子に50gfの荷重をかけ、50mm/分の速
度で加硫シートを水平に移動させたときの値を測定 粘着力：直径16mmの円板状に加工した加硫シート（面積
2cm2）に4Kgf（2Kgf/cm2）の荷重を加え、125℃で15時
間6,6−ナイロン樹脂板に接触静置し、室温に戻した
後、それを引き離すのに要する力を測定 比較例１ 前記加硫シートＡについて、同様の測定を行った。Dynamic friction coefficient: 50gf load is applied to a contactor having the same curvature as a chrome-plated sphere (diameter 10mm), and the value is measured when the vulcanized sheet is moved horizontally at a speed of 50mm / min. Adhesion: Diameter Vulcanized sheet processed into a 16 mm disk shape (area
2cm 2 ) with a load of 4Kgf (2Kgf / cm 2 ), contact with the 6,6-nylon resin plate for 15 hours at 125 ° C, leave it at room temperature, and then measure the force required to pull it apart. Example 1 The same measurement was performed on the vulcanized sheet A.
比較例２ 前記加硫シートＢについて、同様の測定を行った。Comparative Example 2 The same measurement was performed on the vulcanized sheet B.
以上の各比較例での測定結果も、後記表に併記される。The measurement results in each of the above comparative examples are also shown in the table below.
表 例 動摩擦係数 粘着力（Kgf/cm2） 実施例１ 0.2 1.2 〃 ２ 0.2 0.3 〃 ３ 0.3 1.0 〃 ４ 0.3 0.4 〃 ５ 0.4 1.1 〃 ６ 0.4 0.4 比較例１ 0.9 ＞５ 〃 ２ 0.8 3.2 以上の各実施例および比較例共、180゜折り曲げによる
クラックの発生はみられなかった。Table Example coefficient of dynamic friction adhesion (Kgf / cm 2) Example 1 0.2 1.2 〃 2 0.2 0.3 〃 3 0.3 1.0 〃 4 0.3 0.4 〃 5 0.4 1.1 〃 6 0.4 0.4 Comparative Example 1 0.9> 5 〃 2 0.8 3.2 or more respective In both the examples and the comparative examples, no cracks were observed due to 180 ° bending.
Claims (1)
せた有機過酸化物架橋加硫ゴム成形品を該有機過酸化物
分解温度に加熱することを特徴とする加硫ゴム成形品の
表面処理方法。1. A surface of a vulcanized rubber molded article, characterized in that an organic peroxide cross-linked vulcanized rubber molded article having a dialkyl type organic peroxide adhered to the surface is heated to the decomposition temperature of the organic peroxide. Processing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63174949A JPH0798873B2 (en) | 1988-07-15 | 1988-07-15 | Surface treatment method for vulcanized rubber moldings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63174949A JPH0798873B2 (en) | 1988-07-15 | 1988-07-15 | Surface treatment method for vulcanized rubber moldings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0228220A JPH0228220A (en) | 1990-01-30 |
| JPH0798873B2 true JPH0798873B2 (en) | 1995-10-25 |
Family
ID=15987550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63174949A Expired - Lifetime JPH0798873B2 (en) | 1988-07-15 | 1988-07-15 | Surface treatment method for vulcanized rubber moldings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0798873B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3007531A1 (en) * | 1980-02-28 | 1981-10-08 | Dynamit Nobel Ag, 5210 Troisdorf | MOLDED BODY FROM PLASTIC WITH A PEROXYDICALLY CROSSLINKABLE COMPONENT AND METHOD FOR THE PRODUCTION THEREOF |
| JPH0717773B2 (en) * | 1986-11-11 | 1995-03-01 | エヌオーケー株式会社 | Surface treatment method for vulcanized rubber moldings |
| JPH0521931A (en) * | 1991-07-11 | 1993-01-29 | Sumitomo Metal Mining Co Ltd | Manufacture of glass ceramic substrate |
-
1988
- 1988-07-15 JP JP63174949A patent/JPH0798873B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0228220A (en) | 1990-01-30 |
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