To provide a sealant material composition capable of exhibiting good sealability, suppressing flow of a sealant material during travel, securing sufficient adhesiveness to a tire, and satisfactorily maintaining durability of the tire while satisfactorily maintaining these performances over a long period of time.SOLUTION: A sealant material composition constituting a sealant layer 10 arranged on an inner surface of a pneumatic tire contains 0.1-40 pts.mass of sulfur, more than 0 pt.mass and less than 1 pt.mass of a crosslinking aid, and 50-400 pts.mass of a plasticizer component based on 100 pts.mass of a rubber component and has a shear modulus at 20°C of 5-30 kPa, a shear modulus at 80°C of 1-10 kPa, and a maximum value of tanδ measured in a temperature range of 20-100°C of 1.0 or less.SELECTED DRAWING: Figure 1

    【課題】良好なシール性を発揮し、走行中のシーラント材の流動を抑制し、且つ、タイヤに対する十分な接着性を確保し、更に、これら性能を長期に亘って良好に維持しながら、タイヤの耐久性を良好に維持することを可能にしたシーラント材組成物を提供する。【解決手段】空気入りタイヤの内表面に配置されたシーラント層10を構成するシーラント材組成物として、ゴム成分100質量部に対して、硫黄0.1質量部~40質量部、架橋助剤0質量部超1質量部未満、可塑剤成分50質量部~400質量部が配合され、20℃における剪断弾性率が5kPa~30kPaであり、80℃における剪断弾性率が1kPa~10kPaであり、20℃~100℃の温度領域で測定されるtanδの最大値が1.0以下であるものを用いる。【選択図】図1


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    Title :

    SEALANT MATERIAL COMPOSITION


    Additional title:

    シーラント材組成物


    Contributors:

    Publication date :

    2022-02-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    C09K Materialien für Anwendungen, soweit nicht anderweitig vorgesehen , MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR / B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B60C VEHICLE TYRES , Fahrzeugreifen



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