JP2005194317A - Rubber composition - Google Patents

Rubber composition Download PDF

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Publication number
JP2005194317A
JP2005194317A JP2003435667A JP2003435667A JP2005194317A JP 2005194317 A JP2005194317 A JP 2005194317A JP 2003435667 A JP2003435667 A JP 2003435667A JP 2003435667 A JP2003435667 A JP 2003435667A JP 2005194317 A JP2005194317 A JP 2005194317A
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rubber
rubber composition
composition
weight
flakes
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JP2003435667A
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Japanese (ja)
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Kazunori Ishikawa
和憲 石川
Katsuhiro Igawa
勝弘 井川
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Priority to JP2003435667A priority Critical patent/JP2005194317A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber composition which can achieve high barrier properties while maintaining flexiblity, an inner liner composition for tires using the rubber composition, and an aqueous or solvent-based coating rubber composition. <P>SOLUTION: The rubber composition comprises a rubber containing ≥60 wt.% butyl rubber and a flaky metal. The inner liner rubber composition for tires comprises a rubber containing ≥60 wt.% butyl rubber and a flaky metal in an amount of 5-400 pts.wt. based on 100 pts.wt. entire rubber amount. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、ガスバリヤー性に優れたゴム組成物、および当該ゴム組成物のインナーライナーゴム組成物またはコーティングゴム組成物への利用に関する。   The present invention relates to a rubber composition excellent in gas barrier properties and use of the rubber composition in an inner liner rubber composition or a coating rubber composition.

ガスバリヤー性の高いタイヤ用インナーライナーを作製するために、種々の層状鉱物、鱗片状鉱物をブチルゴムなどのガスバリヤー性の高いゴムに混入することが知られている(例えば、特開平6−116439号公報、特開平11−140234号公報、特開2002−88206号公報および特開2002−88208号公報等)。しかしながら、その効果は、未だ満足できるものではなく、更なるガスバリヤー性の高いゴム組成物が望まれている。   In order to produce a tire inner liner having a high gas barrier property, it is known to mix various layered minerals and scale-like minerals with a rubber having a high gas barrier property such as butyl rubber (for example, JP-A-6-116439). No., JP-A-11-140234, JP-A-2002-88206, and JP-A-2002-88208). However, the effect is not yet satisfactory, and a rubber composition having higher gas barrier properties is desired.

特開平6−116439号公報JP-A-6-116439 特開平11−140234号公報JP-A-11-140234 特開2002−88206号公報JP 2002-88206 A 特開2002−88208号公報JP 2002-88208 A

よって、本発明では、柔軟性を保持しつつ、高いバリヤー性を達成し得るゴム組成物、当該ゴム組成物を使用するタイヤ用インナーライナー組成物および水性または溶剤系コーティングゴム組成物を提供することを目的とする。   Accordingly, the present invention provides a rubber composition capable of achieving high barrier properties while maintaining flexibility, an innerliner composition for tires using the rubber composition, and an aqueous or solvent-based coating rubber composition. With the goal.

本発明によれば、ブチルゴムを60重量%以上含むゴムに、フレーク状金属を配合してなるゴム組成物が提供される。また、本発明によれば、ブチルゴムを60重量%以上含むゴムに、当該ゴム総量100重量部に対しフレーク状金属を5〜400重量部配合してなるタイヤ用インナーライナーゴム組成物、および水性または溶剤系コーティングゴム組成物が提供される。   According to this invention, the rubber composition formed by mix | blending a flaky metal with the rubber | gum containing 60 weight% or more of butyl rubber is provided. Further, according to the present invention, an inner liner rubber composition for tires obtained by blending a rubber containing 60% by weight or more of butyl rubber with 5 to 400 parts by weight of a flaky metal with respect to 100 parts by weight of the rubber, A solvent-based coating rubber composition is provided.

本発明では、従来の種々層状鉱物、鱗片状鉱物に代えて金属フレークをゴムに配合したところ、柔軟でかつ優れたガスバリヤー性を有するゴム組成物が得られることを見出したものである。   In the present invention, it has been found that when metal flakes are blended with rubber instead of various conventional layered minerals and scale-like minerals, a rubber composition having flexibility and excellent gas barrier properties can be obtained.

本発明のゴム組成物におけるゴム成分としては、それ自体がガスバリヤー性の良好なブチルゴムが使用される。当該ブチルゴムには、ブチルゴム(IIR)の外、臭素化ブチルゴム(Br−IIR)、塩素化ブチルゴム(Cl−IIR)、臭素化イソブチレン−p−メチルスチレン共重合体ゴム(BIMS)等が用いられる。そのうち、特に十分な加硫速度を得る観点から、臭素化ブチルゴムの使用が好ましい。   As the rubber component in the rubber composition of the present invention, butyl rubber having a good gas barrier property is used. In addition to butyl rubber (IIR), brominated butyl rubber (Br-IIR), chlorinated butyl rubber (Cl-IIR), brominated isobutylene-p-methylstyrene copolymer rubber (BIMS) and the like are used as the butyl rubber. Among these, from the viewpoint of obtaining a sufficient vulcanization rate, it is preferable to use brominated butyl rubber.

本発明のゴム組成物に配合される金属フレークとしては、例えば、アルミニウムフレーク、扁平状Fe−Ni合金フレーク、扁平状Fe−Si合金フレーク、銅フレーク、ニッケルフレーク、クロムフレーク、チタンフレーク、亜鉛フレーク、鉄フレーク、ブロンズフレーク、ステンレスフレーク等が挙げられるが、そのうち、比重等の理由から、アルミニウムフレークを用いることが好ましい。   Examples of metal flakes blended in the rubber composition of the present invention include aluminum flakes, flat Fe-Ni alloy flakes, flat Fe-Si alloy flakes, copper flakes, nickel flakes, chrome flakes, titanium flakes, and zinc flakes. , Iron flakes, bronze flakes, stainless steel flakes, and the like. Among them, aluminum flakes are preferably used for reasons such as specific gravity.

本発明のゴム組成物に配合されるガスバリヤー性を得るための金属フレークの平均粒径は、1〜100μm、より好ましくは3〜50μm、平均厚さは0.01〜5μm、より好ましくは0.02〜2μmが適当である。当該金属フレークの表面には、脂肪族アルコールの正燐酸モノエステルおよび/または正燐酸ジエステル以外の物質、例えば脂肪酸(オレイン酸、ステアリン酸等)、脂肪族アミン、脂肪酸アミド、脂肪酸アルコール、エステル化合物等が吸着していてもよい。また、金属フレーク表面に他の着色顔料層や干渉膜等を形成し着色された着色金属フレークを使用してもよい。更に、当該金属フレークの配合量については、得られるゴム組成物の柔軟性とガスバリヤー性を保持し、かつその他ゴム特性を損わない範囲である5〜400重量部、好ましくは10〜300重量部とすることが好ましい。   The average particle diameter of the metal flakes for obtaining gas barrier properties blended in the rubber composition of the present invention is 1 to 100 μm, more preferably 3 to 50 μm, and the average thickness is 0.01 to 5 μm, more preferably 0. 0.02 to 2 μm is suitable. On the surface of the metal flakes, substances other than orthophosphoric monoesters and / or orthophosphoric diesters of aliphatic alcohols, such as fatty acids (oleic acid, stearic acid, etc.), aliphatic amines, fatty acid amides, fatty acid alcohols, ester compounds, etc. May be adsorbed. Further, colored metal flakes that are colored by forming another colored pigment layer, an interference film or the like on the surface of the metal flakes may be used. Further, the blending amount of the metal flakes is 5 to 400 parts by weight, preferably 10 to 300 parts by weight, in a range that maintains the flexibility and gas barrier properties of the resulting rubber composition and does not impair other rubber properties. Part.

本発明のゴム組成物には、更に、通常のカーボンブラック等の補強剤、加硫または架橋剤、加硫または架橋促進剤、各種オイル、老化防止剤、充填材、可塑化剤、その他一般ゴム用に一般的に配合されている各種添加剤、配合剤を配合することができ、かかる配合物は、一般的な方法で混練、加硫してゴム組成物とし、加硫または架橋することができる。これら添加剤、配合剤の配合量も、本発明の目的に反しない限り、従来の一般的な量とすることができる。   The rubber composition of the present invention further includes ordinary reinforcing agents such as carbon black, vulcanization or cross-linking agents, vulcanization or cross-linking accelerators, various oils, anti-aging agents, fillers, plasticizers, and other general rubbers. It is possible to blend various additives and compounding agents that are generally blended for use, and such blends can be kneaded and vulcanized by a general method to form a rubber composition, which can be vulcanized or crosslinked. it can. The blending amounts of these additives and blending agents can be set to conventional conventional amounts as long as they do not contradict the purpose of the present invention.

以下、実施例および比較例によって本発明を更に説明するが、本発明の範囲をこれらの実施例に限定するものでないことは言うまでもない。   Hereinafter, although an example and a comparative example explain the present invention further, it cannot be overemphasized that the scope of the present invention is not limited to these examples.

試験方法
1)破断特性: JIS K6251に準拠して、M300(300%モジュラス)を測定した。
2)通気度: 東洋精機製ガス透過率測定装置MT−C3を用いて、JIS K7126に準拠して70℃で測定した。
Test Method 1) Breaking property: M300 (300% modulus) was measured according to JIS K6251.
2) Air permeability: Measured at 70 ° C. according to JIS K7126 using a gas permeability measuring device MT-C3 manufactured by Toyo Seiki.

実施例1〜6および比較例1〜3
比較例1および実施例1〜4では、当該各例の配合からなる0.5mm厚の加硫ゴムシートについて、その破断特性および通気度を測定した。また、比較例2、3および実施例5、6では、比較例1の配合からマイカを除いた配合からなる0.5mm厚の加硫ゴムシート上に、当該各例の配合からなるコーティング膜を塗布、乾燥後(膜厚0.1mm)、その通気度を測定した。
結果を表1に示す。

Figure 2005194317
Examples 1-6 and Comparative Examples 1-3
In Comparative Example 1 and Examples 1 to 4, the rupture characteristics and the air permeability of the vulcanized rubber sheet having a thickness of 0.5 mm composed of the respective examples were measured. In Comparative Examples 2 and 3 and Examples 5 and 6, a coating film composed of the composition of each example was formed on a vulcanized rubber sheet having a thickness of 0.5 mm composed of composition obtained by removing mica from the composition of Comparative Example 1. After coating and drying (film thickness 0.1 mm), the air permeability was measured.
The results are shown in Table 1.
Figure 2005194317

表1の結果によると、本発明の金属フレークを所定量配合したゴム組成物は、従来の層状鉱物のマイカを配合したものに比して、弾性物性を維持しつつ、ガスバリヤー性が顕著に向上していることがわかる。   According to the results in Table 1, the rubber composition containing a predetermined amount of the metal flakes of the present invention has a remarkable gas barrier property while maintaining its elastic properties as compared with the conventional composition containing layered mica. It can be seen that it has improved.

よって、本発明のゴム組成物は、特にガスバリヤー性が要求される、タイヤ用インナーライナーおよびコーティング剤組成物等に有効に適用できる。   Therefore, the rubber composition of the present invention can be effectively applied to a tire inner liner, a coating agent composition, and the like that require gas barrier properties.

Claims (4)

ブチルゴムを60重量%以上含むゴムに、フレーク状金属を配合してなるゴム組成物。   A rubber composition comprising a rubber containing 60% by weight or more of butyl rubber and a flaky metal. ブチルゴムを60重量%以上含むゴムに、当該ゴム総量100重量部に対しフレーク状金属を5〜400重量部配合してなるタイヤ用インナーライナーゴム組成物。   An inner liner rubber composition for tires, comprising a rubber containing 60% by weight or more of butyl rubber and 5 to 400 parts by weight of a flaky metal with respect to 100 parts by weight of the total rubber. ブチルゴムを60重量%以上含むゴムに、当該ゴム総量100重量部に対しフレーク状金属を5〜400重量部配合してなる水性または溶剤系コーティングゴム組成物。   An aqueous or solvent-based coating rubber composition comprising a rubber containing 60% by weight or more of butyl rubber and 5 to 400 parts by weight of a flaky metal based on 100 parts by weight of the total rubber. 前記フレーク状金属がアルミニウムフレークである、請求項1〜3のいずれか1項に記載のゴム組成物。   The rubber composition according to any one of claims 1 to 3, wherein the flaky metal is aluminum flakes.
JP2003435667A 2003-12-26 2003-12-26 Rubber composition Pending JP2005194317A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012072364A (en) * 2010-08-31 2012-04-12 Toyo Aluminium Kk Heat conductive resin composition and heat radiation material including the same
JP2012097255A (en) * 2010-10-07 2012-05-24 Nippon Shokubai Co Ltd Thermally conductive adhesive
WO2013021669A1 (en) * 2011-08-09 2013-02-14 東洋アルミニウム株式会社 Thermally conductive resin composition and heat dissipating material containing same
JP2016078510A (en) * 2014-10-10 2016-05-16 横浜ゴム株式会社 Pneumatic tire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012072364A (en) * 2010-08-31 2012-04-12 Toyo Aluminium Kk Heat conductive resin composition and heat radiation material including the same
JP2012097255A (en) * 2010-10-07 2012-05-24 Nippon Shokubai Co Ltd Thermally conductive adhesive
WO2013021669A1 (en) * 2011-08-09 2013-02-14 東洋アルミニウム株式会社 Thermally conductive resin composition and heat dissipating material containing same
JP2016078510A (en) * 2014-10-10 2016-05-16 横浜ゴム株式会社 Pneumatic tire

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