JPH06287370A - Epdm rubber composition and weather strip made thereof - Google Patents
Epdm rubber composition and weather strip made thereofInfo
- Publication number
- JPH06287370A JPH06287370A JP5100496A JP10049693A JPH06287370A JP H06287370 A JPH06287370 A JP H06287370A JP 5100496 A JP5100496 A JP 5100496A JP 10049693 A JP10049693 A JP 10049693A JP H06287370 A JPH06287370 A JP H06287370A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- rubber composition
- epdm
- epdm rubber
- 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
Landscapes
- Seal Device For Vehicle (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ゴム製品としての必要
強度を得るためにケイ酸マグネシウム等の白色充填剤を
添加したカラーゴム組成物及びそのゴム組成物を用いた
ウエザーストリップに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color rubber composition containing a white filler such as magnesium silicate to obtain the required strength as a rubber product, and a weather strip using the rubber composition. .
【０００２】[0002]
【従来の技術】図１を参考にして説明する。従来、自動
車用ウエザーストリップにおいて、芯材１とこれを被覆
するＥＰＤＭゴム組成物であるソリッドゴム層２と、シ
ール部のスポンジ層３と、装飾用の被膜部４より成る自
動車用ウエザーストリップにおいて、装飾用被膜部４の
カラーゴム組成物にはゴム製品としての必要強度を得る
ために、例えば次に示すようにケイ酸マグネシウム等の
白色充填剤を添加している。すなわち、 ＥＰＤＭ １００ 重量部 亜鉛華 ５〜１０ 重量部 ステアリン酸 １〜４ 重量部 加工助剤 ３〜１５ 重量部 ケイ酸マグネシウム ３０〜７０ 重量部 炭酸カルシウム ３０〜７０ 重量部 酸化チタン ５〜３０ 重量部 着色顔料 任意 重量部 粉末硫黄 １．０〜２．０ 重量部 チアゾール系促進剤 １．０〜２．０ 重量部 チウラム系促進剤 １．０〜２．０ 重量部 ジチオカルバメート系促進剤 １．０〜２．０ 重量部 脱水剤 ５．０〜１５．０ 重量部2. Description of the Related Art A description will be given with reference to FIG. Conventionally, in a weather strip for an automobile, a core material 1, a solid rubber layer 2 which is an EPDM rubber composition coating the core material, a sponge layer 3 of a seal portion, and a coating portion 4 for decoration are used in the automobile weather strip. A white filler such as magnesium silicate is added to the color rubber composition of the decorative coating 4 in order to obtain the required strength as a rubber product, for example, as shown below. That is, EPDM 100 parts by weight Zinc white 5 to 10 parts by weight Stearic acid 1 to 4 parts by weight Processing aid 3 to 15 parts by weight Magnesium silicate 30 to 70 parts by weight Calcium carbonate 30 to 70 parts by weight Titanium oxide 5 to 30 parts by weight Coloring pigment Optional parts by weight Powder sulfur 1.0 to 2.0 parts by weight Thiazole-based accelerator 1.0 to 2.0 parts by weight Thiuram-based accelerator 1.0 to 2.0 parts by weight Dithiocarbamate-based accelerator 1.0 ~ 2.0 parts by weight Dehydrating agent 5.0 ~ 15.0 parts by weight
【０００３】しかしながら、上記従来の配合は、発泡剤
を添加しなくても、高温無加圧加硫（熱空気加硫・ガラ
スビーズ流動床加硫その他）成形工程で発泡現象が生
じ、そのため製品に付けたシボ模様がぼやけたり、製品
強度が低下し、破れ易くなったりすると言う問題点があ
る。上記発泡現象は、組成物内に含まれるエアや水分を
機械的に脱気（主として押出機に減圧装置を付設して行
う）したり、脱水剤を増量したり等してある程度抑制可
能であるが、それだけでは不十分であって、発泡は避け
得ない。However, in the above-mentioned conventional blending, a foaming phenomenon occurs in a high temperature pressureless vulcanization (hot air vulcanization, glass bead fluidized bed vulcanization, etc.) molding process without adding a foaming agent, so that a product is produced. There is a problem that the grain pattern attached to the product is blurred, the product strength is reduced, and the product is easily broken. The foaming phenomenon can be suppressed to some extent by mechanically deaerating the air and water contained in the composition (mainly by attaching a decompression device to the extruder) or increasing the amount of dehydrating agent. However, that is not enough and foaming is unavoidable.
【０００４】[0004]
【発明が解決しようとする課題】解決しようとする問題
点は、上記従来のゴム組成物は、高温無加圧加硫工程で
発泡現象が生じ、そのため製品に付けたシボ模様がぼや
けたり、製品強度が低下し、破れ易くなったりすること
である。The problem to be solved is that the above-mentioned conventional rubber composition causes a foaming phenomenon in the high temperature pressureless vulcanization process, which causes the grain pattern on the product to be blurred, That is, the strength is reduced and the film is easily broken.
【０００５】[0005]
【課題を解決するための手段】本発明に係るＥＰＤＭゴ
ム組成物は、無加圧加硫を行うところのＥＰＤＭゴム組
成物において、ＥＰＤＭ １００重量部に対して無水ケ
イ酸 １０重量部以上を配合したものである。The EPDM rubber composition according to the present invention is an EPDM rubber composition which is subjected to pressureless vulcanization, and 10 parts by weight or more of silicic acid anhydride is added to 100 parts by weight of EPDM. It was done.
【０００６】また、本発明に係るウエザーストリップ
は、図１において、ＥＰＤＭゴム組成物よりなるソリッ
ドゴム層２の外表面の少なくとも一部に、ＥＰＤＭ １
００重量部に対して無水ケイ酸 １０重量部以上を配合
したところの無加圧加硫ＥＰＤＭゴム組成物よりなる装
飾用被膜部４を設けてなるものである。Further, in the weather strip according to the present invention, in FIG. 1, at least a part of the outer surface of the solid rubber layer 2 made of the EPDM rubber composition has EPDM 1
It is provided with a decorative coating portion 4 made of a pressureless vulcanized EPDM rubber composition in which 10 parts by weight or more of silicic acid is mixed with 00 parts by weight.
【０００７】[0007]
【実施例】実施例について説明すると、カラーゴム組成
物にはゴム製品としての必要強度を得るために、以下に
示すように、白色充填剤として、ケイ酸マグネシウム
（例えば、ミストロンベーパー）・炭酸カルシウム（例
えば、白艶華ＣＣ）の代わり無水ケイ酸（例えば、日本
アエロジル製のアエロジルＲ９７２Ｄ・Ｒ９７４・Ｒ９
７６・１３０・２００その他）を添加する。すなわち、 配合 実 施 例 比 較 例 ＥＰＤＭ １００ 重量部 同左 ケイ酸マグネシウム ０ 重量部 ５０重量部 炭酸カルシウム ０ 重量部 ５０重量部 亜鉛華 ５ 重量部 同左 ステアリン酸 １ 重量部 同左 加工助剤 ６ 重量部 同左 無水珪酸（アエロジルR972D) ５０ 重量部 同左 酸化チタン １０ 重量部 同左 着色顔料 任意 重量部 同左 粉末硫黄 ２．０ 重量部 同左 チアゾール系促進剤 １．５ 重量部 同左 チウラム系促進剤 １．０ 重量部 同左 ジチオカルバメート系促進剤 １．０ 重量部 同左 脱水剤 ７．０ 重量部 同左EXAMPLES In order to explain the examples, in order to obtain the required strength as a rubber product in a color rubber composition, as shown below, as a white filler, magnesium silicate (for example, mistron vapor) / carbonic acid was used. Silicic anhydride instead of calcium (eg, white luster CC) (eg, Aerosil R972D / R974 / R9 manufactured by Nippon Aerosil Co., Ltd.)
76/130/200 and others) is added. That is, compounding example, comparative example, EPDM 100 parts by weight left side magnesium silicate 0 parts by weight 50 parts by weight calcium carbonate 0 parts by weight 50 parts by weight zinc white 5 parts by weight left side stearic acid 1 part by weight left side processing aid 6 parts by weight left side Silicic anhydride (Aerosil R972D) 50 parts by weight Same as left Titanium oxide 10 parts by weight Same as left Coloring pigment optional parts by weight Same as left Powder sulfur 2.0 parts by weight Same as left Thiazole-based accelerator 1.5 parts by weight Same as thiuram-based accelerator 1.0 parts by weight Same as left Dithiocarbamate accelerator 1.0 parts by weight Same as on the left Dehydrating agent 7.0 parts by weight Same as on the left
【０００８】なお、サンプルは上記ゴム組成物を押出機
で押出成形したものを連続的に高温無加圧加硫して製造
した。Samples were produced by continuously extruding the above rubber composition with an extruder and vulcanizing at high temperature.
【０００９】作用について説明すると、サンプルの加硫
条件の違いによる比重・発泡度を従来配合のものと比較
したものが表１である。Explaining the operation, Table 1 shows a comparison of the specific gravity and the foaming degree due to the difference in the vulcanization conditions of the sample with that of the conventional compound.
【００１０】[0010]
【表１】 [Table 1]
【００１１】また、押出性及び引張強度の比較を表２に
示す。Table 2 shows a comparison of extrudability and tensile strength.
【００１２】[0012]
【表２】 [Table 2]
【００１３】上記の通り、無水ケイ酸を添加することに
よって、ゴム組成物に対する補強効果が向上し、高温無
加圧加硫成形時、機械的脱気や脱水剤の増量を行わなく
ても、発泡現象が起こらず、製品に付けたシボ模様がぼ
やけず、強度が格段に向上する。しかも押出成形時のエ
ッジ部が非常に滑らかに成形される。なお、無水ケイ酸
が１０重量部より少ないと補強効果が小さく発泡し、シ
ボがぼやけるし、又、やぶれやすいという問題が発生す
る。As described above, by adding silicic acid anhydride, the reinforcing effect on the rubber composition is improved, and at the time of high temperature pressureless vulcanization molding, mechanical deaeration and increase of dehydrating agent are not required. The foaming phenomenon does not occur, the grain pattern on the product does not blur, and the strength is significantly improved. Moreover, the edge portion at the time of extrusion molding is formed very smoothly. If the amount of silicic acid anhydride is less than 10 parts by weight, the reinforcing effect is small, and foaming occurs, resulting in blurring of wrinkles and a problem of easy shaking.
【００１４】[0014]
【発明の効果】本発明は以上のように構成されるため、
高温無加圧加硫成形時、発泡現象が起こらず、例えばカ
ーボンを充填したゴム組成物の本体に、本発明のゴム組
成物の被膜部を押出機で共押出成形したものを連続的に
高温無加圧加硫する自動車用ドアウエザーストリップ・
建材用目地ガスケット等の他、広く活用可能である。Since the present invention is constructed as described above,
During high-temperature pressureless vulcanization molding, a foaming phenomenon does not occur, and for example, a body of a rubber composition filled with carbon is co-extruded with a coating part of the rubber composition of the present invention using an extruder to continuously obtain high temperature. Automobile door weather strip that vulcanizes without pressure
It can be widely used in addition to joint gaskets for building materials.
【図１】ウエザーストリップの断面図である。FIG. 1 is a cross-sectional view of a weather strip.
１ 芯材 ２ ソリッドゴム層 ３ スポンジゴム層 ４ 被膜部 1 core material 2 solid rubber layer 3 sponge rubber layer 4 coating
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年４月１３日[Submission date] April 13, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００７】[0007]
【実施例】実施例について説明すると、カラーゴム組成
物にはゴム製品としての必要強度を得るために、以下に
示すように、白色充填剤として、ケイ酸マグネシウム
（例えば、ミストロンベーパー）・炭酸カルシウム（例
えば、白艶華ＣＣ）の代わり無水ケイ酸（例えば、日本
アエロジル製のアエロジルＲ９７２Ｄ・Ｒ９７４・Ｒ９
７６・１３０・２００その他）を添加する。すなわち、 配合 実 施 例 比 較 例 ＥＰＤＭ １００ 重量部 同左 ケイ酸マグネシウム ０ 重量部 ５０重量部 炭酸カルシウム ０ 重量部 ５０重量部 亜鉛華 ５ 重量部 同左 ステアリン酸 １ 重量部 同左 加工助剤 ６ 重量部 同左 無水珪酸（アエロジルＲ９７２Ｄ） ５０ 重量部 ０ 酸化チタン １０ 重量部 同左 着色顔料 任意 重量部 同左 粉末硫黄 ２．０ 重量部 同左 チアゾール系促進剤 １．５ 重量部 同左 チウラム系促進剤 １．０ 重量部 同左 ジチオカルバメート系促進剤 １．０ 重量部 同左 脱水剤 ７．０ 重量部 同左EXAMPLES In order to explain the examples, in order to obtain the required strength as a rubber product in a color rubber composition, as shown below, as a white filler, magnesium silicate (for example, mistron vapor) / carbonic acid was used. Silicic anhydride instead of calcium (eg, white luster CC) (eg, Aerosil R972D / R974 / R9 manufactured by Nippon Aerosil Co., Ltd.)
76/130/200 and others) is added. That is, compounding example, comparative example, EPDM 100 parts by weight left side magnesium silicate 0 parts by weight 50 parts by weight calcium carbonate 0 parts by weight 50 parts by weight zinc white 5 parts by weight left side stearic acid 1 part by weight left side processing aid 6 parts by weight left side Silicic anhydride (Aerosil R972D) 50 parts by weight 0 Titanium oxide 10 parts by weight Same as on the left Colored pigments optional parts by weight Same as on the left Powder sulfur 2.0 parts by weight Same as on the left Thiazole accelerator 1.5 parts by weight Same on the left Thiuram accelerator 1.0 parts by weight Same as left Dithiocarbamate accelerator 1.0 parts by weight Same as on the left Dehydrating agent 7.0 parts by weight Same as on the left
Claims (2)
組成物において、ＥＰＤＭ １００重量部に対して無水
ケイ酸 １０重量部以上を配合したＥＰＤＭゴム組成
物。1. An EPDM rubber composition in which pressureless vulcanization is performed, wherein 10 parts by weight or more of silicic anhydride is mixed with 100 parts by weight of EPDM.
トリップソリッドゴム層（２）の外表面の少なくとも一
部に、ＥＰＤＭ １００重量部に対して無水ケイ酸 １
０重量部以上を配合したところの無加圧加硫ＥＰＤＭゴ
ム組成物よりなる装飾用被膜部（４）を設けてなるウエ
ザーストリップ。2. At least a part of the outer surface of a weather strip solid rubber layer (2) made of an EPDM rubber composition, wherein 1 part of silicic acid anhydride is added to 100 parts by weight of EPDM.
A weather strip provided with a decorative coating part (4) made of a pressureless vulcanized EPDM rubber composition containing 0 part by weight or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5100496A JP3026045B2 (en) | 1993-04-02 | 1993-04-02 | Automotive weather strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5100496A JP3026045B2 (en) | 1993-04-02 | 1993-04-02 | Automotive weather strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06287370A true JPH06287370A (en) | 1994-10-11 |
| JP3026045B2 JP3026045B2 (en) | 2000-03-27 |
Family
ID=14275544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5100496A Expired - Fee Related JP3026045B2 (en) | 1993-04-02 | 1993-04-02 | Automotive weather strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3026045B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128263A (en) * | 2011-03-17 | 2011-07-20 | 江阴海达橡塑股份有限公司 | Whole-sealing encapsulating sponge rubber sealing strip and continuous extrusion and vulcanization molding method thereof |
| CN107471983A (en) * | 2017-09-21 | 2017-12-15 | 陈银 | A kind of sealing strip for door frame of automobile |
-
1993
- 1993-04-02 JP JP5100496A patent/JP3026045B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128263A (en) * | 2011-03-17 | 2011-07-20 | 江阴海达橡塑股份有限公司 | Whole-sealing encapsulating sponge rubber sealing strip and continuous extrusion and vulcanization molding method thereof |
| CN107471983A (en) * | 2017-09-21 | 2017-12-15 | 陈银 | A kind of sealing strip for door frame of automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3026045B2 (en) | 2000-03-27 |
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