JPH0723464B2 - Friction material - Google Patents
Friction materialInfo
- Publication number
- JPH0723464B2 JPH0723464B2 JP2211242A JP21124290A JPH0723464B2 JP H0723464 B2 JPH0723464 B2 JP H0723464B2 JP 2211242 A JP2211242 A JP 2211242A JP 21124290 A JP21124290 A JP 21124290A JP H0723464 B2 JPH0723464 B2 JP H0723464B2
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- friction material
- fiber
- naphthol
- phenol
- 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
- Phenolic Resins Or Amino Resins (AREA)
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は特に、耐フェード性に優れた自動車用ブレー
キパッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention particularly relates to a brake pad for an automobile having excellent fade resistance.
（従来の技術及び発明が解決すべき課題） 従来、自動車用ブレーキパッドには、金属繊維、セラミ
ック繊維等を基材とし、この基材に充填剤及び結合剤を
混合した摩擦材を用いている。(Prior Art and Problems to be Solved by the Invention) Conventionally, a friction material in which a base material is a metal fiber, a ceramic fiber, or the like, and a filler and a binder are mixed is used for a brake pad for an automobile. .
この摩擦材の結合剤には、従来、フェノール樹脂を用い
ていたが、耐熱性を考慮する場合ストレートないしはフ
ェノール基間に反応基を持たないベンゼン核を主体とす
るが、架橋密度が高くマトリックスが堅いため、局所当
りによるフェードで効力が低下する。またカシュー、オ
イル、ゴム等の変性樹脂は柔軟性はでるが耐熱性に劣
り、問題がある。Conventionally, a phenol resin has been used as the binder of this friction material, but when heat resistance is taken into consideration, it is mainly composed of straight or benzene nuclei having no reactive group between phenol groups, but the matrix density is high and the matrix Since it is stiff, fade due to local contact reduces efficacy. Further, modified resins such as cashew, oil, and rubber have flexibility, but have poor heat resistance, which is problematic.
さらに耐フェード性を向上するために樹脂の配合量を減
じ、充填剤の配合量を増やすことも考えられるが、この
方法ではブレーキパッドの摩耗増や効き安定性及びノイ
ズ等に問題が生じ、好ましくない。It is also possible to reduce the resin content and increase the filler content in order to further improve the fade resistance, but this method causes problems such as increased wear of the brake pad, effective stability and noise, and is preferable. Absent.
（課題を解決するための手段） 本発明はかかる課題を解消するためになされたもので、
従来の摩擦材用結合剤であるフェノール樹脂（一般のフ
ェノール樹脂）の一部または全部に代えて耐熱性を有す
るナフトール系樹脂を使用し、耐熱性を有するブレーキ
パッドを提供するもので、特に耐フェード性に優れてい
ることを特徴としている。(Means for Solving the Problems) The present invention has been made to solve the problems,
It provides a heat-resistant brake pad by using a heat-resistant naphthol resin in place of a part or all of the conventional friction resin binder (general phenolic resin). It is characterized by excellent fade characteristics.
（作用） このような、耐熱性樹脂であるナフトール系樹脂を使う
ことにより、高温・高負荷時の摩擦係数が安定する。(Function) By using such a naphthol resin which is a heat resistant resin, the friction coefficient at high temperature and high load is stabilized.
（実施例） 以下に本発明の実施例を示すが、これは例示であり、こ
れによって本発明を限定するものではない。(Examples) Examples of the present invention will be shown below, but these are only examples and do not limit the present invention.
結合剤であるナフトールとフェノールの共重合体樹脂は
ナフトールとフェノールをモル比１対１で、アルカリ触
媒であるアンモニアを用い、ホルムアルデヒドと共重合
反応し、縮合することで、本発明にかかるナフトールと
フェノールの共重合体樹脂を得る。この樹脂を結合剤と
し、基材のスチール繊維及び黒鉛やその他の充填剤を表
１に示す体積比（％）にしたって配合し、これを均一に
混練する。The copolymer resin of naphthol and phenol which is a binder has a molar ratio of naphthol and phenol of 1: 1 and ammonia which is an alkali catalyst is used to cause a copolymerization reaction with formaldehyde to condense the naphthol and the naphthol according to the present invention. A copolymer resin of phenol is obtained. Using this resin as a binder, steel fibers as a base material, graphite, and other fillers are mixed at a volume ratio (%) shown in Table 1, and these are uniformly kneaded.
次に上記複合材料を金型に充填し、温度150℃、圧力500
kg/cm2で圧縮成形する。できた成形品を200℃で４時間
の所定条件によりアフターキュアを施した。 Next, the above-mentioned composite material is filled in a mold, and the temperature is 150 ° C and the pressure is 500.
Compress and mold at kg / cm 2 . The resulting molded product was subjected to after-curing under the predetermined conditions of 200 ° C. for 4 hours.
このナフトールとフェノールの共重合体樹脂を用いた自
動車用ブレーキパッドを実施例（第１図中Ａ）とし、一
般のフェノール樹脂のみを用いた自動車用ブレーキパッ
ドを従来例（第１図中Ｂ）として、フェード試験につい
て比較試験し、添付の第１図のごとき結果を得た。An automobile brake pad using this naphthol-phenol copolymer resin is used as an example (A in FIG. 1), and an automobile brake pad using only a general phenol resin is used as a conventional example (B in FIG. 1). As a result, a comparison test was performed on the fade test, and the results as shown in the attached FIG. 1 were obtained.
（発明の効果） 本発明品によれば、摩擦係数が高く安定した耐フェード
性に優れた自動車用ブレーキパッドを提供しうることが
判る。(Effects of the Invention) According to the product of the present invention, it is possible to provide a brake pad for an automobile having a high friction coefficient and stable and excellent in fade resistance.
第１図は、本実施例と従来例における摩擦材の制動回転
数に対する摩擦係数の関係を示す特性曲線である。FIG. 1 is a characteristic curve showing the relationship of the friction coefficient with respect to the braking rotational speed of the friction material in this example and the conventional example.
Claims (6)
材、そして黒鉛、金属粉、無機充填剤等よりなる摩擦材
において、前記耐熱性樹脂は、ナフトールとフェノール
の共重合体樹脂であることを特徴とする摩擦材。1. A friction material comprising a heat-resistant resin as a binder, a reinforcing fiber as a base material, and graphite, metal powder, an inorganic filler, etc., wherein the heat-resistant resin is a copolymer resin of naphthol and phenol. A friction material characterized by being present.
が、酸を触媒として合成された請求項１記載の摩擦材。2. The friction material according to claim 1, wherein the copolymer resin of naphthol and phenol is synthesized using an acid as a catalyst.
が、アルカリを触媒として合成された請求項１記載の摩
擦材。3. The friction material according to claim 1, wherein the copolymer resin of naphthol and phenol is synthesized by using an alkali as a catalyst.
銅繊維、黄銅繊維、亜鉛繊維、ニッケル繊維、クロム繊
維等の金属繊維である請求項１記載の摩擦材。4. The reinforcing fibers are steel fibers, aluminum fibers,
The friction material according to claim 1, which is a metal fiber such as copper fiber, brass fiber, zinc fiber, nickel fiber, or chromium fiber.
等の無機繊維である請求項１記載の摩擦材。5. The friction material according to claim 1, wherein the reinforcing fibers are inorganic fibers such as glass fibers and ceramic fibers.
維等の有機繊維である請求項１記載の摩擦材。6. The friction material according to claim 1, wherein the reinforcing fibers are organic fibers such as aramid fibers and acrylic fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2211242A JPH0723464B2 (en) | 1990-08-09 | 1990-08-09 | Friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2211242A JPH0723464B2 (en) | 1990-08-09 | 1990-08-09 | Friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0493386A JPH0493386A (en) | 1992-03-26 |
| JPH0723464B2 true JPH0723464B2 (en) | 1995-03-15 |
Family
ID=16602646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2211242A Expired - Lifetime JPH0723464B2 (en) | 1990-08-09 | 1990-08-09 | Friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723464B2 (en) |
-
1990
- 1990-08-09 JP JP2211242A patent/JPH0723464B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0493386A (en) | 1992-03-26 |
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