A polymer blend including an organic polymer with a reactive silicon-containing group which gives cured objects excellent elongation property and stress relaxation, a composition including the polymer blend, a specific filler, and a curing catalyst, a sealant including the composition; and a sealant for tires, are provided. A polymer blend including an organic polymer with a bifunctional reactive silicon-containing group of a specific structure is mixed with polyoxyalkylene (A). Polyoxyalkylene (A) has an average molecular weight of 13,000 or higher and 100,000 or lower, a reactive-silicon-containing-group equivalent Eqa of 0.010 mmol/g or more and 0.29 mmol/g or less, and contains more than one silicon-containing group per molecule and polyoxyalkylene (B). Polyoxyalkylene (B) has an average molecular weight of 3,000 or higher and 25,000 or lower, a reactive-silicon-containing group only at one end, and a reactive-silicon-containing-group equivalent Eqb of 0.03 mmol/g or more and 0.58 mmol/g or less.
POLYMER BLEND, COMPOSITION, SEALANT, AND SEALANT FOR TIRE
2021-12-16
Patent
Electronic Resource
English
POLYMER BLEND, COMPOSITION, SEALANT, AND SEALANT FOR TIRE
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