JPH0345639A - Ethylene-acrylic rubber composition - Google Patents
Ethylene-acrylic rubber compositionInfo
- Publication number
- JPH0345639A JPH0345639A JP18344489A JP18344489A JPH0345639A JP H0345639 A JPH0345639 A JP H0345639A JP 18344489 A JP18344489 A JP 18344489A JP 18344489 A JP18344489 A JP 18344489A JP H0345639 A JPH0345639 A JP H0345639A
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- acrylic rubber
- weight
- heat resistance
- parts
- 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.)
- Granted
Links
- 229920006229 ethylene acrylic elastomer Polymers 0.000 title claims abstract description 21
- 239000000203 mixture Substances 0.000 title claims description 7
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims 1
- 239000006087 Silane Coupling Agent Substances 0.000 abstract description 7
- 238000013329 compounding Methods 0.000 abstract 1
- 238000007906 compression Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 5
- 238000004073 vulcanization Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 102100040440 Adenylate kinase isoenzyme 5 Human genes 0.000 description 1
- 101710168711 Adenylate kinase isoenzyme 5 Proteins 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 organic acid ester Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Sealing Material Composition (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明はエチレン−アクリルゴムの改良に関し、さらに
詳しくはエチレン−アクリルゴムの耐熱性及び圧縮永久
歪性を犠牲にすることなく金型離型性の改良を行ったエ
チレン−アクリルゴム組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the improvement of ethylene-acrylic rubber, and more particularly to the improvement of ethylene-acrylic rubber without sacrificing its heat resistance and compression set. The present invention relates to an ethylene-acrylic rubber composition with improved properties.
［従来の技術］
エチレン−アクリル共重合体は、耐熱性、耐候性、耐オ
シ″ン性などの性質に優れたエラストマーとしてガスケ
ット・パツキンなどのシール材に広く用いられている。[Prior Art] Ethylene-acrylic copolymers are widely used in sealing materials such as gaskets and packings as elastomers with excellent properties such as heat resistance, weather resistance, and oxidation resistance.
しかし、従来のエチレン−アクリルエラストマーは他の
合成ゴムと比較して加工性、特に金型からの離型性に劣
っており、これを解消するためにワックス、パラフィン
等の離型剤が種々検討され様々な配合をもって実施され
ている。However, conventional ethylene-acrylic elastomers are inferior to other synthetic rubbers in processability, especially in release properties from molds, and in order to solve this problem, various mold release agents such as wax and paraffin have been investigated. It has been implemented with various formulations.
［発明が解決しようとする課題］
しかしながら、この種のワックス、パラフィン等は何れ
も充分な性能を発揮するに至っていない、すなわち、配
合する内部離型剤の使用量を極端に増加させると離型性
は良好になるが耐熱性及び圧縮永久歪性は悪くなり、逆
に耐熱性及び圧縮永久歪性に影響のない使用量だと金型
離型は非常に悪いものとなる。[Problems to be Solved by the Invention] However, none of these types of waxes, paraffins, etc. have achieved sufficient performance. In other words, if the amount of internal mold release agent used is extremely increased, mold release will occur. Although the properties are good, the heat resistance and compression set properties are poor; conversely, if the amount used does not affect the heat resistance and compression set properties, mold release becomes very poor.
本発明はかかる欠点に鑑み、金型離型性の良好なエチレ
ン−アクリルエラストマーを提供することを目的として
いる。In view of these drawbacks, it is an object of the present invention to provide an ethylene-acrylic elastomer with good mold releasability.
［課題を解決するための手段］
本発明は、エチレン−アクリルゴム１００重量部に対し
て
（１）構造式
で表されるマクロモノマ−３〜２０重量部＋２構造式
％式％）
で表されるγ−グリシドキシプロビルトリメトキシシラ
ン０．１〜５重量部
上記（１１，（２１を配合してなるエチレン−アクリル
ゴム組成物である。[Means for Solving the Problems] The present invention provides a macromonomer represented by (1) structural formula (3 to 20 parts by weight + 2 structural formula % formula %) for 100 parts by weight of ethylene-acrylic rubber. This is an ethylene-acrylic rubber composition comprising 0.1 to 5 parts by weight of γ-glycidoxypropyltrimethoxysilane (11 and (21) above).
［作用］
エチレン−アクリルゴムはその特性の一つであるムーニ
ー粘度が低いことにより加硫ゴムの金型離型性は非常に
悪い。[Function] Ethylene-acrylic rubber has a low Mooney viscosity, which is one of its characteristics, and therefore the mold releasability of vulcanized rubber is very poor.
本発明で使用されるシリコーンセグメントを有している
マクロモノマーはゴムの加硫時にエチレン−アクリルゴ
ムの架橋サイトのカルボニル基と反応し、ゴムの主鎖に
シリコーンセグメントがブランチした形となる。このゴ
ム中のシリコーンセグメントが金型離型性を大幅に改良
することとなる。また、シランカップリング剤の科学的
な反応により耐熱性及び圧縮永久歪性はマクロモノマー
の使用量が増加しても悪くなることはない。The macromonomer having a silicone segment used in the present invention reacts with the carbonyl group at the crosslinking site of the ethylene-acrylic rubber during vulcanization of the rubber, resulting in a form in which the silicone segment is branched in the main chain of the rubber. The silicone segment in this rubber significantly improves the mold releasability. Furthermore, due to the chemical reaction of the silane coupling agent, the heat resistance and compression set properties do not deteriorate even if the amount of macromonomer used increases.
［実施例コ
本発明において用いられるエチレン−アクリルゴムは、
構造式 ＋ＣＨ２−ＣＨｚ＋ｒｆＣｈ−ＣＩ−１州Ｒ
ｈＣ＝ＯＣ＝０
０ ０Ｈ
ＣＨ。[Example] The ethylene-acrylic rubber used in the present invention has the following structural formula: +CH2-CHz+rfCh-CI-1 State R
hC=OC=0 0 0H CH.
で表されるエチレンとアクリル酸メチルを主成分に第３
成分すなわち架橋サイトモノマーとして不飽和有機酸エ
ステルが結合した三元共重合体であで表されるマクロモ
ノマーは、重合可能な官能基を末端にもつ高分子量のモ
ノマーである。このマクロモノマーの使用量は３〜２０
重量部で好ましくは５〜１５重量部である。The main components are ethylene and methyl acrylate expressed as
The component, ie, the macromonomer represented by a terpolymer to which an unsaturated organic acid ester is bonded as a crosslinking site monomer, is a high molecular weight monomer having a polymerizable functional group at the end. The amount of this macromonomer used is 3 to 20
It is preferably 5 to 15 parts by weight.
この使用量が３重量部未満では離型効果が少なく、２０
重量部を超えると離型効果は良好となるが耐熱性が著し
く悪くなる。If the amount used is less than 3 parts by weight, the mold release effect will be small, and 20
If the amount exceeds 1 part by weight, the mold release effect will be good, but the heat resistance will be significantly deteriorated.
で表されるシランカップリング剤の使用量は０１１〜５
重量部であり、好ましくは０．５〜２重量部である。こ
の使用量が０．１重量部未満では耐熱性及び圧縮永久歪
性を改善することは不可能であり、５重量部を超えると
架橋密度が異常に上がり、またコスト面でも非常に高価
なものになる。The amount of silane coupling agent used is 011 to 5.
Parts by weight, preferably 0.5 to 2 parts by weight. If the amount used is less than 0.1 part by weight, it is impossible to improve heat resistance and compression set, and if it exceeds 5 parts by weight, the crosslinking density will increase abnormally, and the product will be very expensive in terms of cost. become.
さらに、本発明の組成物は実用に供するに際し、その目
的に応じて補強剤、充填剤、可塑剤等を添加して底型・
加硫を行うことができる。また、混線、加硫する機械と
しては通常ゴム工業で用いるものを使用することができ
る。Furthermore, when the composition of the present invention is put into practical use, reinforcing agents, fillers, plasticizers, etc. may be added depending on the purpose to form a bottom mold.
Vulcanization can be performed. Further, as the cross-wire and vulcanization machines, those normally used in the rubber industry can be used.
以下、実施例１．２．３、比較例１．２を示すエチレン
−アクリルゴム２００ｇを８インチロールに巻き付は第
１表の配合薬品を記載の順序に従って混線後３ ＋ｕ＋
ａの厚さに分出し１７０’ＣＸ１０分のプレス加硫を行
いさらに１８０°ｃ×４時間のギヤーオーブン熱空気加
熱を行い試料を作製した。Hereinafter, 200 g of ethylene-acrylic rubber shown in Example 1.2.3 and Comparative Example 1.2 was wound around an 8-inch roll, and the chemicals listed in Table 1 were mixed in the order listed.
A sample was prepared by press vulcanization at 170°C for 10 minutes to a thickness of a, followed by hot air heating in a gear oven at 180°C for 4 hours.
田デュポン社ｌエチレンーアクリルゴム 商品名ＶＡ
ＭＡＣＧ■日本セイロウＩＩパラフィン１７０°ＦＧ１
日本理化買ワックス 高品名ダイヤモンドワックス沌東
亜合成化学工業ＩＩマクυモノマー 商品名ＡＫ−５！
ｉ！Ｉ化学Ｉｉ＠製シランカップリング剣商品名ＫＢＭ
４０３金型離型性の評価方法としては、混練後の試料を
〕８０°ＣＸ５分でシートを成型し、シートが金型から
離型しなくなるまでの成型回数を比較した。DuPont Ethylene-acrylic rubber Product name VA
MACG■Japan Seiro II Paraffin 170°FG1
Nippon Rikaku Wax High quality Diamond Wax Chaos Toagosei Kagaku Kogyo II Mac υ Monomer Product name AK-5!
i! Silane coupling sword made by I Kagaku Ii @ Product name KBM
As a method for evaluating the mold releasability of 403, the sample after kneading was molded into a sheet at 80° C. for 5 minutes, and the number of times of molding until the sheet could no longer be released from the mold was compared.
実施例１．２．３及び比較例１．２の諸物性及び評価結
果を第２表に示す。Table 2 shows the physical properties and evaluation results of Example 1.2.3 and Comparative Example 1.2.
第２表
典し」０１４
第２表から明らかなように、実施例１．２．３の離型性
評価結果よりマクロモノマーの添加効果は非常に大きく
、またシランカップリング剤と併用すれば耐熱性を犠牲
にすることなく離型性を良くすることができる。014 As is clear from Table 2, the effect of adding macromonomers is very large based on the mold release evaluation results of Example 1.2.3, and when used in combination with a silane coupling agent, heat resistance It is possible to improve mold releasability without sacrificing properties.
従って、本発明のエチレン−アクリルゴム組成物はエチ
レン−アクリルゴムの耐熱性及び圧縮永久歪を犠牲にす
ることなく金型離型性を充分改良したものである。Therefore, the ethylene-acrylic rubber composition of the present invention has sufficiently improved mold releasability without sacrificing the heat resistance and compression set of ethylene-acrylic rubber.
［発明の効果］
加硫時にエチレン−アクリルゴムの主鎖にブランチした
シリコーンセグメントにより金型離型性が大幅に改良さ
れる。[Effects of the Invention] The silicone segment branched into the main chain of the ethylene-acrylic rubber during vulcanization significantly improves mold releasability.
金型離型性が大幅に改良されることにより金型汚染が少
なくなり製品外観は大変良い。The mold releasability is greatly improved, resulting in less mold contamination and a very good product appearance.
シランカップリング剤の使用により長期耐熱性が良好と
なる。Long-term heat resistance is improved by using a silane coupling agent.
マクロモノマーの使用量が増加してもシランカップリン
グ剤を併用することで耐熱性及び圧縮永久歪性は低下し
ない。Even if the amount of macromonomer used increases, heat resistance and compression set will not decrease by using a silane coupling agent in combination.
Claims (1)
造式 ▲数式、化学式、表等があります▼ で表されるマクロモノマー３〜２０重量部 （２）構造式 ▲数式、化学式、表等があります▼ で表されるγ−グリシドキシプロピルトリメトキシシラ
ン０．１〜５重量部 上記（１）、（２）を配合してなることを特徴としたエ
チレン−アクリルゴム組成物。[Claims] For 100 parts by weight of ethylene-acrylic rubber, 3 to 20 parts by weight of a macromonomer represented by (1) Structural formula ▲ Numerical formula, chemical formula, table, etc. ▼ (2) Structural formula ▲ Numerical formula, There are chemical formulas, tables, etc. ▼ Ethylene-acrylic rubber composition characterized by blending 0.1 to 5 parts by weight of γ-glycidoxypropyltrimethoxysilane (1) and (2) above. thing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18344489A JP2696401B2 (en) | 1989-07-14 | 1989-07-14 | Ethylene-acrylic rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18344489A JP2696401B2 (en) | 1989-07-14 | 1989-07-14 | Ethylene-acrylic rubber composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0345639A true JPH0345639A (en) | 1991-02-27 |
| JP2696401B2 JP2696401B2 (en) | 1998-01-14 |
Family
ID=16135878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18344489A Expired - Fee Related JP2696401B2 (en) | 1989-07-14 | 1989-07-14 | Ethylene-acrylic rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2696401B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100479576B1 (en) * | 2002-11-19 | 2005-04-14 | 서울산업대학교 산학협력단 | apparatus for getting a desired number of droplets |
-
1989
- 1989-07-14 JP JP18344489A patent/JP2696401B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100479576B1 (en) * | 2002-11-19 | 2005-04-14 | 서울산업대학교 산학협력단 | apparatus for getting a desired number of droplets |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2696401B2 (en) | 1998-01-14 |
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