Elastomer tire filling material
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsKunio Kageyama, Tetsuo Hayashi
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Abstract
An elastomer obtained by reacting at a specific ratio an isocyanate-terminated prepolymer formed by reacting at a specific ratio of polymer containing a diene polymer having a terminal hydroxyl group with a diisocyanate compound, with a curing agent having a terminal hydroxyl or amine group, is especially excellent as a tire filling material. A tire prepared by filling this elastomer is valuable as an elastic tire of a public vehicle.
Claims7
A tire filling material comprising an elastomer obtained by reacting (A) a prepolymer having a terminal isocyanate group with (B) a curing agent composed of a compound having a terminal hydroxyl or amino group at a ratio satisfying a requirement represented by the following formula (I):
- ##EQU3## wherein A stands for the number of NCO groups in the prepolymer (A) and B stands for the number of OH or NH.sub.2 groups in the curing agent (B),
- said prepolymer (A) containing a product obtained by reacting (C) a polymer containing at least a diene polymer having a terminal hydroxyl group and a molecular weight lower than 10,000 with a diisocyanate compound at a ratio satisfying a requirement represented by the following formula (II):
- ##EQU4## wherein D stands for the number of NCO groups in the diisocyanate compound and C stands for the number of OH groups in the polymer (C).
Dependencies are inferred from the claim text.