Provided are: a polymer blend which includes an organic polymer having a reactive silicon-containing group and which can give cured objects excellent in terms of elongation property and stress relaxation; a composition comprising the polymer blend, a specific filler, and a curing catalyst; a sealant comprising the composition; and a sealant for tires. A polymer blend which includes an organic polymer having a bifunctional reactive silicone-containing group of a specific structure is mixed with given proportions of a polyoxyalkylene (A) which has a number-average molecular weight of 13,000-100,000, has a reactive-silicone-containing-group equivalent Eqa of 0.010-0.29 mmol/g, and contains more than one silicon-containing group per molecule and a polyoxyalkylene (B) which has a number-average molecular weight of 3,000-25,000, has a reactive-silicon-containing group only at one end, and has a reactive-silicon-containing-group equivalent Eqb of 0.03-0.58 mmol/g.

    本发明提供能够得到伸长性和应力松弛性优异的固化物的包含具有反应性硅基的有机聚合物的聚合物共混物、含有该聚合物共混物、特定的填料及固化催化剂的组合物、使用了该组合物的密封胶、及轮胎用密封胶。在含有具有特定结构的双官能性反应性硅基的有机聚合物的聚合物共混物中,分别以给定的比率配合有聚氧化烯(A)及聚氧化烯(B),该聚氧化烯(A)的数均分子量为13000以上且100000以下、反应性硅基当量Eqa为0.010mmol/g以上且0.29mmol/g以下、且每1分子的硅基多于1个,该聚氧化烯(B)的数均分子量为3000以上且25000以下、仅在单侧末端具有反应性硅基、且该反应性硅基当量Eqb为0.03mmol/g以上且0.58mmol/g以下。


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    Title :

    POLYMER BLEND, COMPOSITION, SEALANT, AND SEALANT FOR TIRE


    Additional title:

    聚合物共混物、组合物、密封胶、及轮胎用密封胶


    Contributors:

    Publication date :

    2021-10-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS / C09K Materialien für Anwendungen, soweit nicht anderweitig vorgesehen , MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR



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