JPS61241361A - Rubber composition - Google Patents
Rubber compositionInfo
- Publication number
- JPS61241361A JPS61241361A JP8380285A JP8380285A JPS61241361A JP S61241361 A JPS61241361 A JP S61241361A JP 8380285 A JP8380285 A JP 8380285A JP 8380285 A JP8380285 A JP 8380285A JP S61241361 A JPS61241361 A JP S61241361A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- rubber composition
- silicone rubber
- tensile strength
- coupling agent
- 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
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、試作品作製用、または少量生産用の耐久性に
すぐれた簡易型（ゴム型）用のゴム組成物に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rubber composition for use in simple molds (rubber molds) with excellent durability for making prototypes or for small-scale production.
従来の技術
従来、試作品作製用のゴム材料は、ＲＴＶシリコーンゴ
ム（常温硬化タイプ、たとえば、信越化学〔株〕のＫＥ
１３００や東しシリコーン〔株〕（７）ＳＥ９５５５
など）と、ＡＢ台などでつくられたマスターモデルを用
いて型どシしてつくるのが一般的だった◎また、型どシ
・用のゴム材料としては、これ以上の物性値のものは現
在なく、実際、この材料以外のシリコーンゴムを型どシ
用として用いられていなかった。一方、これに対して、
従来、さらに物性的な強度が大きいシリコーンゴムがあ
！ｌｌ（たとえば、液状シリコーンゴム、熱加硫ゴム）
、これは型どシ用としてこれまで使われたことはなく、
このゴムそのものを射出成形して、ゴム成形物として利
用されていた。Conventional technology Conventionally, the rubber material used for making prototypes has been RTV silicone rubber (room-temperature curing type, such as KE manufactured by Shin-Etsu Chemical Co., Ltd.).
1300 Yatoshi Silicone Co., Ltd. (7) SE9555
etc.), and it was common to mold it using a master model made on an AB stand etc. ◎ Also, as a rubber material for molds and molds, there are no rubber materials with physical properties higher than this. Currently, there is no such material, and in fact, no silicone rubber other than this material has been used for molds. On the other hand, on the other hand,
Conventionally, there is silicone rubber with even greater physical strength! ll (e.g. liquid silicone rubber, heat vulcanized rubber)
, which has never been used for molding,
This rubber itself was injection molded and used as a rubber molded product.
発明が解決しようとする問題点
しかしながら、上記の方法では、■ ＲＴＶシリコーン
ゴムを用いたゴム型は、成形物となる材料が、ウレタン
樹脂やエポキシ樹脂を用いた場合、寸法精度が出るとい
う点ではすぐれているものの、耐久性がないという欠点
があった。すなわち、複雑な形状だと１回で、内部のゴ
ム構造体がちぎれてしまうという問題点があった。■
液状シリコーンゴムでは、従来、型どシ用として用いる
ため、高粘度であっても重合収縮率が大きいという問題
点があった。Problems to be Solved by the Invention However, in the above method, ■ Rubber molds using RTV silicone rubber cannot achieve dimensional accuracy when the molded material is urethane resin or epoxy resin. Although it was excellent, it had the drawback of lack of durability. That is, if the shape is complicated, there is a problem in that the internal rubber structure may be torn off in one use. ■
Liquid silicone rubber has conventionally been used for forming molds, so it has had the problem of a high polymerization shrinkage rate even if it has a high viscosity.
本発明は、上記問題点に鑑み、引きさき強度。In view of the above-mentioned problems, the present invention has been developed to improve the tensile strength.
引張り強度にすぐれた高耐久性の型であるのと同時に、
低重合収縮率にすぐれた、型どり用ゴム型上記問題点を
解決するために、発明者らは、平均アスペクト比（繊維
長／繊維直径）が２０から５００の、ミルド７フイパー
、ガラスフレーク。At the same time, it is a highly durable mold with excellent tensile strength.
Rubber mold for molding with excellent low polymerization shrinkage rate In order to solve the above problems, the inventors developed a milled 7 fiber glass flake having an average aspect ratio (fiber length/fiber diameter) of 20 to 500.
鉱物繊維などの充てん繊維を、ビニルシラ／カップリン
グ剤で表面処理し、この２重量％から３０重量％を、熱
加硫型シリコーンゴムか、液状シリコーンゴムに混合し
て得られるゴム組成物は、引張り強度と引きさき強度に
すぐれ、また、重合収縮率も小さいという、従来のゴム
組成物にみられない全く新規なすぐれた材料であること
を発見したのである。この組成物は、充てん繊維と熱加
硫型ゴム、または液状シリコーンゴムとの組み合せによ
り、従来、まったく知られていなかった高ひきさき強度
、高引張り強度という特性の改良がなされ、また、充て
ん繊維を加えることにより、重合収縮率をも改良するこ
とができたものである。A rubber composition obtained by surface-treating filled fibers such as mineral fibers with vinyl silica/coupling agent and mixing 2% to 30% by weight of this with heat-curable silicone rubber or liquid silicone rubber is as follows: They discovered that it is a completely new and excellent material not found in conventional rubber compositions, with excellent tensile strength and tear strength, and low polymerization shrinkage. By combining the filled fibers with heat-vulcanized rubber or liquid silicone rubber, this composition has improved properties such as high tensile strength and high tensile strength, which were completely unknown in the past. By adding , the polymerization shrinkage rate could also be improved.
作 用
本発明に訃いて、充てん剤は補材としての作用をし、平
均アスペクト比が２０から５００であればよい。カップ
リング剤は、充てん繊維とゴム材料とを密着させる作用
をし、ビニルシランカップリング剤がよい。シリコーン
ゴムは、マトリックスとしての作用をし、熱加硫ゴムか
液状シリコ−詳しく説明する。Function According to the present invention, the filler acts as an auxiliary material and may have an average aspect ratio of 20 to 500. The coupling agent acts to bring the filled fibers and the rubber material into close contact, and is preferably a vinyl silane coupling agent. The silicone rubber acts as a matrix and is either a heat vulcanized rubber or a liquid silicone.
実施例 １
以下、本発明の一実施例のゴム組成物について説明する
。Example 1 A rubber composition according to an example of the present invention will be described below.
４００ノのイソプロピルアルコールと純水との混合物（
重量比水／インブービルアルコール＝ １ ／９ ）に
、ビニルシランカップリング剤（日本ユニカー〔株〕製
、Ａ−１７１）２りを加え、約３０秒間攪拌した。この
混合液中に、アスペクト比が６０の鉱物繊維（林化成〔
株〕製、ニスファイバーＦＦ）を２００１加えて充分に
浸漬した。これを空気中に放置して乾燥させたのち、１
３０″Ｃの恒温槽中に１時間加熱して反応を完全にした
。これを液状シリコーンゴム（東し〔創製、５Ｅ６７２
１ ）中に、１．２，５，１０，２０，３０，３５重量
％となるように混合した。これを１３０″Ｃで加熱・プ
レスしてシートをつくシ、引きさき強度、引張シ強度用
試験片を作製した。これを所定の方法で、試験した結果
を第１図に示している。この図から、充てん繊維が２重
量％以上５ｏｑ６以下では、従来のＲＴＶゴム（信越化
学〔株〕製、ＫＥ１３００）に比べて、引張９強度、引
きさき強度が、ともに１８倍から２４倍の向上があった
。この時、充てん繊維の体積分率が２重量％以下では、
補強機能が小さく、３０重量％以上では、高粘度のため
に作業がしにくかった。また、３０重量％以上加えても
、あまり物性値の向上がないことがわかった。A mixture of 400 g of isopropyl alcohol and pure water (
Two parts of a vinyl silane coupling agent (manufactured by Nippon Unicar Co., Ltd., A-171) was added to the mixture (weight ratio water/imbubil alcohol=1/9), and the mixture was stirred for about 30 seconds. In this mixed solution, mineral fibers with an aspect ratio of 60 (Hayashi Kasei
Varnish Fiber FF 2001 (manufactured by Co., Ltd.) was added and thoroughly immersed. After leaving this in the air to dry, 1
The reaction was completed by heating for 1 hour in a constant temperature bath at 30"C.
1) were mixed in amounts of 1.2, 5, 10, 20, 30, and 35% by weight. This was heated and pressed at 130"C to form a sheet, and a test piece for tensile strength and tensile strength was prepared. This was tested according to a prescribed method, and the results are shown in Figure 1. From the figure, when the filler fiber content is 2% by weight or more and 5oq6 or less, both the tensile 9 strength and the tensile strength are improved by 18 to 24 times compared to the conventional RTV rubber (KE1300 manufactured by Shin-Etsu Chemical Co., Ltd.). At this time, when the volume fraction of the filled fibers was 2% by weight or less,
The reinforcing function was small, and when it was over 30% by weight, it was difficult to work due to the high viscosity. Furthermore, it was found that even if 30% by weight or more was added, the physical properties did not improve much.
つぎに、第２図に示すマスターモデル１を用いて、ゴム
型を作製し、従来のゴム型（Ｋｌｉ：１３ｏｏ）と型ど
りの回数を比べると、従来のものが２回使用しただけで
、ちぎれが発生したのに対し、開発品では、６８回もの
使用が可能となった。これよシ、従来の３４倍もの耐久
性が得られたことがわかる。Next, we made a rubber mold using the master model 1 shown in Figure 2, and compared the number of moldings with a conventional rubber mold (Kli: 13oo). However, the developed product can be used 68 times. It can be seen that the durability is 34 times longer than that of the conventional method.
実施例 ２
（実施例１）において、ビニルシランカップリング剤を
、Ａ−１７，４（日本ユニカー〔株〕製）。Example 2 In (Example 1), the vinyl silane coupling agent was A-17,4 (manufactured by Nippon Unicar Co., Ltd.).
シリコーンゴムとしては、ＡＣ３１７４／３０（バイエ
ル合成（株）製）とし、他はまったく（実施例１）と同
様にして試験片を作製した。そして、この引きさき強度
、引張り強度を測定した結果を図３に示している。この
図から充てん繊維が歪重量４３０重量％以下では、従来
のＲＴＶゴム（信越化学（株）製、ＫＥ１３００）にく
らべて、引張り強度、引きさき強度、ともに１５倍から
２０倍の向上があった。この時、充てん繊維が２重量％
以下、３０重量％以上では、〔実施例１〕と同様なこと
がいえた。As the silicone rubber, AC3174/30 (manufactured by Bayer Synthetic Co., Ltd.) was used, and a test piece was prepared in the same manner as in Example 1 except for the above. FIG. 3 shows the results of measuring the tear strength and tensile strength. This figure shows that when the strain weight of the filled fibers is 430% by weight or less, the tensile strength and drag strength are both 15 to 20 times higher than that of conventional RTV rubber (KE1300, manufactured by Shin-Etsu Chemical Co., Ltd.). . At this time, the filling fiber is 2% by weight.
Hereinafter, when the content was 30% by weight or more, the same thing as in [Example 1] could be said.
つぎに〔実施例１〕と同様にして、第２図のマスターモ
デルをつかって、ゴム型を作製し、その耐久性をしらべ
た。その結果、型どり回数が６７回可能であシ、従来の
２７倍の耐久性のある型が得られた。Next, in the same manner as in [Example 1], a rubber mold was prepared using the master model shown in FIG. 2, and its durability was examined. As a result, a mold that could be molded 67 times and was 27 times more durable than conventional molds was obtained.
実施例 ３
〔実施例１〕で、充てん繊維をミルドファイバー（日東
紡積＠）＃ｒ ＰＦＡ−” １）ｔガラスフレーク（日
本板カラス（株）製、ＣＣＦ−０４８）を用い、メツシ
ュを用いて平均アスペクト比が、５０．７０，１００，
２００，５００，５５６となるように分離した。これら
の重量分率を１０Ｗｔチとし、他は実施例１と同様にし
て試験片を作製した。これらを所定の方法で試験した結
果を、第４図、第５図に示している。Example 3 In [Example 1], milled fiber (Nitto Boseki@) #r PFA-" 1) T glass flakes (manufactured by Nippon Shea Karasu Co., Ltd., CCF-048) were used as the filling fibers, and a mesh was used. The average aspect ratio is 50.70,100,
It was separated into 200,500,556. A test piece was prepared in the same manner as in Example 1 except that the weight fraction of these was set to 10 Wt. The results of testing these using a predetermined method are shown in FIGS. 4 and 5.
第４図、第５図のミルド７アイパーやガラスフレークを
用いた物性値かられかるように、平均アスペクト比が７
０以上、５ｏＯ以下では引きさき強度、引張シ強度が１
６倍から２０倍になることがわかった。このとき、平均
アスペクト比が、７０以下では繊維の補強の効果は不さ
ぐ、ＳＯＯ以上では、５００のときょシもそれほど向上
はみられなかった。As shown in Figures 4 and 5, the average aspect ratio is 7.
0 or more and 5oO or less, the tensile strength and tensile strength are 1.
It was found that the increase was 6 to 20 times. At this time, when the average aspect ratio was 70 or less, the effect of reinforcing the fibers was poor, and when the average aspect ratio was SOO or more, even when it was 500, no significant improvement was observed.
発明の効果
以上、本発明によれば、従来のゴム組成物の引きさき強
度、引張シ強度について、１５倍から２０倍の物性値の
向上に効果を発揮するものであり、また、ゴム型の耐久
性としては、従来の２６倍から３０倍の耐久性の向上に
効果を発揮するものである。As described above, the present invention is effective in improving the physical property values of conventional rubber compositions by 15 to 20 times in terms of tensile strength and tensile strength. In terms of durability, it is effective in improving durability by 26 to 30 times compared to conventional products.
第１図は充てん繊維の重量分率に対する引張り強度、引
きさき強度の関係を示す図、第２図は従来のゴム組成物
と開発品との耐久性を比較するためのマスターモデルの
斜視図である。第３図は充てん繊維の重量分率に対する
引張シ強度、引きさき強度の関係を示す図である。第４
図はミルドファイバーの７スベクト比に対する、引張り
強度。
ひきさき強度との関係を示す図である。第６図はガラス
フレークのアスペクト比に対する引張シ強度、引きさき
強度との関係を示す図である。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第３
図
ブＥｚ・ん繊稗４重１１分号（（シ４〕Ｍ ４ 図
ミルドファイバ゛−のアス１’７１ Ｋ。
第５図Figure 1 is a diagram showing the relationship between tensile strength and drag strength with respect to the weight fraction of filled fibers, and Figure 2 is a perspective view of a master model for comparing the durability of a conventional rubber composition and a developed product. be. FIG. 3 is a diagram showing the relationship between the tensile strength and the drag strength with respect to the weight fraction of the filled fibers. Fourth
The figure shows the tensile strength of milled fibers with respect to their 7-spectral ratio. FIG. 3 is a diagram showing the relationship with grinding strength. FIG. 6 is a diagram showing the relationship between the aspect ratio of glass flakes and the tensile strength and drag strength. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Fig. 5
Claims (4)
を、カップリング剤で表面処理し、２重量％から３０重
量％をシリコーンゴムに混合して得られるゴム組成物。(1) A rubber composition obtained by surface-treating a filler having an average aspect ratio of 20 to 500 with a coupling agent and mixing 2% to 30% by weight with silicone rubber.
レーク、鉱物繊維である特許請求の範囲第１項に記載の
ゴム組成物。(2) The rubber composition according to claim 1, wherein the filler is milled glass fiber, glass flake, or mineral fiber.
である特許請求の範囲第１項に記載のゴム組成物。(3) The rubber composition according to claim 1, wherein the coupling agent is a vinyl silane coupling agent.
状シリコーンゴムである特許請求の範囲第１項に記載の
ゴム組成物。(4) The rubber composition according to claim 1, wherein the silicone rubber is a heat-vulcanized silicone rubber or a liquid silicone rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8380285A JPS61241361A (en) | 1985-04-19 | 1985-04-19 | Rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8380285A JPS61241361A (en) | 1985-04-19 | 1985-04-19 | Rubber composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61241361A true JPS61241361A (en) | 1986-10-27 |
Family
ID=13812789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8380285A Pending JPS61241361A (en) | 1985-04-19 | 1985-04-19 | Rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61241361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999019396A1 (en) * | 1997-10-10 | 1999-04-22 | Rockwool International A/S | Reinforcing mineral fibres |
| WO2009039889A1 (en) | 2007-09-28 | 2009-04-02 | Pirelli Tyre S.P.A. | Tire and crosslinkable elastomeric composition comprising glass flakes |
-
1985
- 1985-04-19 JP JP8380285A patent/JPS61241361A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999019396A1 (en) * | 1997-10-10 | 1999-04-22 | Rockwool International A/S | Reinforcing mineral fibres |
| WO2009039889A1 (en) | 2007-09-28 | 2009-04-02 | Pirelli Tyre S.P.A. | Tire and crosslinkable elastomeric composition comprising glass flakes |
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