JP3074428B2 - Rubber composition for molded products - Google Patents
Rubber composition for molded productsInfo
- Publication number
- JP3074428B2 JP3074428B2 JP05189099A JP18909993A JP3074428B2 JP 3074428 B2 JP3074428 B2 JP 3074428B2 JP 05189099 A JP05189099 A JP 05189099A JP 18909993 A JP18909993 A JP 18909993A JP 3074428 B2 JP3074428 B2 JP 3074428B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- rubber
- parts
- weight
- rubber composition
- 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
- 229920001971 elastomer Polymers 0.000 title claims description 23
- 239000005060 rubber Substances 0.000 title claims description 23
- 239000000203 mixture Substances 0.000 title claims description 10
- 229910021536 Zeolite Inorganic materials 0.000 claims description 16
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 16
- 239000010457 zeolite Substances 0.000 claims description 16
- 229920002943 EPDM rubber Polymers 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 229910052717 sulfur Inorganic materials 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000010734 process oil Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- -1 for example Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 238000010060 peroxide vulcanization Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車用ウエザースト
リップ等の型成形物用ゴム組成物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber composition for molded articles such as weather strips for automobiles.
【０００２】[0002]
【従来の技術】従来、自動車用ウエザーストリップ等の
型成形物を製造するに当たって、ハロゲン化ゴムにおい
ては、各種用途に応じて、ハロゲン化ゴムに対して金属
酸化物（例えばＺｎＯ）単独か、または金属酸化物と有
機加硫促進剤とを組合わせたものを配合し、さらに必要
に応じて各種充填剤等（例えばステアリン酸・ＳＲＦ・
プロセスオイル・発泡剤その他）の配合物を添加した
後、型成形加硫することにより製造する方法で、実用に
供されている。また、他のゴム、例えばＥＰＤＭに対し
ても、同様に硫黄を添加し、さらに有機加硫促進剤、必
要に応じて上記各種充填剤等の配合物を添加した後、型
成形加硫することにより製造されている。なお、場合に
よっては、有機過酸化物加硫も行うことも可能である。2. Description of the Related Art Conventionally, in the production of molded articles such as weather strips for automobiles, depending on various uses, a halogenated rubber may be used with a metal oxide (for example, ZnO) alone or depending on various uses. A mixture of a metal oxide and an organic vulcanization accelerator is blended, and if necessary, various fillers (eg, stearic acid, SRF,
This method is manufactured by adding a compound of a process oil, a foaming agent, and the like, followed by molding and vulcanization. In addition, sulfur is similarly added to other rubbers, for example, EPDM, and a compound such as an organic vulcanization accelerator and, if necessary, the above-mentioned various fillers is added. It is manufactured by. In some cases, organic peroxide vulcanization can also be performed.
【０００３】しかしながら、上記従来のハロゲン化ゴム
等のゴム組成物を型成形加硫すると、成形（ショット）
回数が増すと金型表面が汚れ、型成形物の表面のツヤが
無くなったり、肌が荒れたりすると言う問題点がある。
なお、その原因を調べてみると、図１及び図２に示すよ
うに、従来のスポンジの配合では、金型１０内で加硫反
応が進むと、発生した硫黄Ｓのラジカル（Ｓ・）の殆ど
はゴムの架橋（加硫）に消費されるが、金型表面がＦｅ
（鉄）の場合、Ｆｅと（Ｓ・）とが反応して、ＦｅＳ
（硫化鉄）が生成し、これが１ショット毎に増加し、図
１に示すように、汚れベース２０を形成することが判明
している。３ショットで略金型の表面が硫黄Ｓと反応し
て黒変し、さらにショット数を増加して行くと、図２に
示すように、この汚れベース２０の表面の凹の部分にゴ
ム・フィラー等が付着して、汚れ膜３０が形成され、金
型表面に海・島の模様が生じてゴムの流れを阻害する
（この現象は、昭和電工製の表面処理剤クリーンＳで処
理することにより観察される）。However, when a rubber composition such as the above-described conventional halogenated rubber is molded and vulcanized, molding (shot) is performed.
As the number of times increases, there is a problem that the surface of the mold becomes dirty, the gloss of the surface of the molded product disappears, and the skin becomes rough.
When examining the cause, as shown in FIGS. 1 and 2, in the conventional sponge compound, when the vulcanization reaction proceeds in the mold 10, the generated radicals (S ·) of sulfur S are generated. Most are consumed for rubber crosslinking (vulcanization), but the mold surface is Fe
In the case of (iron), Fe and (S •) react to form FeS
It has been found that (iron sulfide) is generated and increases every shot, forming a dirt base 20 as shown in FIG. In three shots, the surface of the mold was substantially blackened by reacting with sulfur S, and the number of shots was further increased. As shown in FIG. And the like adhere to the surface to form a dirt film 30, and a sea / island pattern is formed on the surface of the mold to impede the flow of rubber. Observed).
【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、上記従来の自動車用ウエザーストリップ等の型成
形物用ゴム組成物は、型成形（ショット）回数が増すと
金型１０表面が汚れ、型成形物の表面のツヤが無くなっ
たり、肌が荒れたりすると言う問題点がある。The problem to be solved is that the conventional rubber composition for a molded article such as a weather strip for an automobile has a problem that the surface of the mold 10 becomes dirty as the number of times of molding (shot) increases. However, there is a problem that the gloss of the surface of the molded article is lost or the skin becomes rough.
【０００５】[0005]
【課題を解決するための手段】第１の発明は、型成形物
用ゴム１００重量部に対して、天然もしくは合成ゼオラ
イトを０．５〜１０重量部含むことを特徴とする自動車
用ウエザーストリップ等の型成形物用ゴム組成物であ
る。According to a first aspect of the present invention, there is provided a weather strip or the like for an automobile, wherein a natural or synthetic zeolite is contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of a rubber for molded articles. The rubber composition for molded articles of the above.
【０００６】第２の発明は、第１の発明のゼオライト
が、粒径０．５〜１０ミクロンのゼオライトよりなるも
のである。According to a second aspect, the zeolite of the first aspect is composed of a zeolite having a particle size of 0.5 to 10 microns.
【０００７】第３の発明は、第１の発明または第２の発
明の型成形物用ゴムが、ハロゲン化ゴムまたはＥＰＤＭ
よりなるものである。In a third aspect, the rubber for molded articles according to the first or second aspect is a halogenated rubber or EPDM.
Consisting of
【０００８】[0008]
【実施例】実施例について説明すると、ＥＰＤＭ（三石
４０１０） １００重量部に対して、ＺｎＯ（１号）
５重量部、ステアリン酸 ２重量部、ＳＲＦ ７５重量
部、プロセスオイル（ｐｗ−３８０） ４０重量部、硫
黄 １．５重量部、加硫促進剤 ３．０重量部、及び発
泡剤 ９．０重量部を配合したもの、それに天然ゼオラ
イト（Ｎａ2Ｏ・２Ｓｉ2Ｏ・Ａｌ2Ｏ3、商品名ミルトン
Ｂ）もしくは合成ゼオライト（Ｎａ2Ｏ・Ｓｉ2Ｏ・Ａｌ
2Ｏ3、商品名ＴＡＦ）をそれぞれ３，４，５，６，７重
量部添加した後、型成形加硫した時のゼオライト配合の
割合と、金型の掃除が必要になる迄のショット数との関
係を調べた結果を図３及び図４に示す。The present invention will be described in more detail with reference to Examples. ZnO (No. 1) is added to 100 parts by weight of EPDM (Mitsuishi 4010).
5 parts by weight, stearic acid 2 parts by weight, SRF 75 parts by weight, process oil (pw-380) 40 parts by weight, sulfur 1.5 parts by weight, vulcanization accelerator 3.0 parts by weight, and blowing agent 9.0 parts by weight part obtained by blending, it natural zeolite (Na 2 O · 2Si 2 O · Al 2 O 3, tradename Milton B) or synthetic zeolite (Na 2 O · Si 2 O · Al
After the addition of 3, 4, 5, 6, 7 parts by weight of 2 O 3 and trade name TAF, respectively, the ratio of zeolite blending at the time of mold vulcanization and the number of shots until the mold needs to be cleaned The results of examining the relationship with are shown in FIGS. 3 and 4.
【０００９】作用について説明すると、天然ゼオライト
の添加割合の増加に従って金型の汚れも少なくなり、金
型の掃除を必要とする迄のショット数は増大するが、添
加割合６重量部をピーク（４００ショット）に、添加割
合７重量部にすると、ゴムの流れが悪化し、型落ちを起
こす。また合成ゼオライトについても、その添加割合の
増加に従って、金型の掃除が必要になる迄のショット数
は増大するが、添加割合５重量部をピーク（３００ショ
ット）に、それ以上増すと、流れが悪くなり、型落ちを
起こす。これは、硫黄Ｓが金型表面の鉄（Ｆｅ）と反応
して行く速度がゼオライトが硫黄を吸着して行く速度を
上回り、さらにその速度を、硫黄Ｓがポリマーの二重結
合へ反応して行く速度を上回るため、金型表面にＦｅＳ
の汚れベースが形成され難くなるためである。[0009] The effect will be described. As the addition ratio of the natural zeolite increases, the stain on the mold decreases, and the number of shots before the mold needs to be cleaned increases. If the addition ratio is 7 parts by weight in (shot), the flow of the rubber is deteriorated and the mold is dropped. Also, as for the synthetic zeolite, the number of shots before the mold needs to be cleaned increases as the addition ratio increases, but the flow increases when the addition ratio reaches 5 parts by weight to a peak (300 shots) and further increases. It gets worse and loses mold. This is because the rate at which sulfur S reacts with iron (Fe) on the mold surface exceeds the rate at which zeolite adsorbs sulfur, and the rate at which sulfur S reacts with the double bonds of the polymer Go faster than FeS
This is because it becomes difficult to form a dirt base.
【００１０】すなわち、型成形物用ゴム１００重量部に
対して、天然もしくは合成ゼオライトを０．５〜１０重
量部添加することにより、型成形加硫時の金型の汚れを
実質的に防止することが出来る。しかも、結論だけ示せ
ば、ゼオライトの粒径は０．５〜１０ミクロンが好まし
く、型成形物用ゴムとしてＥＰＤＭ以外にハロゲン化ゴ
ムに対しても有効である。[0010] That is, by adding 0.5 to 10 parts by weight of natural or synthetic zeolite to 100 parts by weight of the rubber for molded products, contamination of the mold at the time of vulcanization is substantially prevented. I can do it. In addition, only the conclusion is that the particle size of the zeolite is preferably 0.5 to 10 microns, and it is effective for halogenated rubbers other than EPDM as rubber for molded products.
【００１１】[0011]
【発明の効果】本発明は以上のように構成されるため、
ＥＰＤＭ等の型成形加硫時の金型の汚れを実質的に防止
することが出来る。Since the present invention is configured as described above,
It is possible to substantially prevent stains on the mold during vulcanization of the mold such as EPDM.
【図１】型成形加硫時の金型表面の汚れのベース示す原
理説明図である。FIG. 1 is a principle explanatory view showing a base of a stain on a mold surface during mold vulcanization.
【図２】型成形加硫時の金型表面の汚れ膜を示す原理説
明図である。FIG. 2 is a principle explanatory view showing a stain film on the surface of a mold at the time of mold vulcanization.
【図３】本発明の実施例の効果を示す天然ゼオライト配
合割合と金型の掃除が必要になる迄のショット数との関
係図である。FIG. 3 is a graph showing the relationship between the natural zeolite blending ratio and the number of shots required until the mold needs to be cleaned, showing the effect of the embodiment of the present invention.
【図４】本発明の実施例の効果を示す合成ゼオライト配
合割合と金型の掃除が必要になる迄のショット数との関
係図である。FIG. 4 is a graph showing the relationship between the composition ratio of synthetic zeolite and the number of shots until the mold needs to be cleaned, showing the effect of the embodiment of the present invention.
１０ 金型 ２０ 汚れベース ３０ 汚れ膜 Ｓ 硫黄 Reference Signs 10 Mold 20 Soil base 30 Soil film S Sulfur
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−287370（ＪＰ，Ａ) 特開 平６−240051（ＪＰ，Ａ) 特開 平６−248134（ＪＰ，Ａ) 特開 平４−93351（ＪＰ，Ａ) 特開 平３−269037（ＪＰ，Ａ) 特開 平３−197542（ＪＰ，Ａ) 特開 平３−76745（ＪＰ，Ａ) 特開 平３−76739（ＪＰ，Ａ) 特開 昭63−110232（ＪＰ，Ａ) 特開 昭61−233048（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C08L 21/00 C08K 3/34 C08L 15/02 C08L 23/16 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-6-287370 (JP, A) JP-A-6-240051 (JP, A) JP-A-6-248134 (JP, A) JP-A-4- 93351 (JP, A) JP-A-3-269037 (JP, A) JP-A-3-197542 (JP, A) JP-A-3-76745 (JP, A) JP-A-3-76739 (JP, A) JP-A-63-110232 (JP, A) JP-A-61-233048 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C08L 21/00 C08K 3/34 C08L 15/02 C08L 23/16
Claims (3)
天然もしくは合成ゼオライトを０．５〜１０重量部含む
ことを特徴とする自動車用ウエザーストリップ等の型成
形物用ゴム組成物。Claims: 1. 100 parts by weight of rubber for molded products
A rubber composition for a molded product such as a weatherstrip for automobiles, comprising 0.5 to 10 parts by weight of a natural or synthetic zeolite.
ンのゼオライトよりなる請求項１記載の自動車用ウエザ
ーストリップ等の型成形物用ゴム組成物。2. The rubber composition according to claim 1, wherein the zeolite is a zeolite having a particle size of 0.5 to 10 μm.
ＥＰＤＭよりなる請求項１又は請求項２記載の自動車用
ウエザーストリップ等の型成形物用ゴム組成物。3. The rubber composition for a molded article such as a weatherstrip for an automobile according to claim 1, wherein the rubber for the molded article comprises a halogenated rubber or EPDM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05189099A JP3074428B2 (en) | 1993-06-30 | 1993-06-30 | Rubber composition for molded products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05189099A JP3074428B2 (en) | 1993-06-30 | 1993-06-30 | Rubber composition for molded products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0718119A JPH0718119A (en) | 1995-01-20 |
| JP3074428B2 true JP3074428B2 (en) | 2000-08-07 |
Family
ID=16235340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05189099A Expired - Lifetime JP3074428B2 (en) | 1993-06-30 | 1993-06-30 | Rubber composition for molded products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3074428B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101366089B1 (en) * | 2007-01-24 | 2014-02-20 | 삼성전자주식회사 | Rubber roller, process for preparing the same, and imaging apparatus using the rubber roller |
| KR101690766B1 (en) * | 2014-11-28 | 2016-12-28 | 유일고무 주식회사 | Rubber compositon for weather strip, preparing method thereof and weather strip formed therefrom |
-
1993
- 1993-06-30 JP JP05189099A patent/JP3074428B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0718119A (en) | 1995-01-20 |
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