Viscoelasticity improving agent for rubber and rubber composition containing the same
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsKeisuke Chino, Naoshi Miyashita, Makoto Ashiura, Tetsuji Kawazura
Life of this patent
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Abstract
A viscoelasticity improving agent for rubber obtained by reacting an alkyllithium compound with a free radical compound having an isocyanate group in the molecule thereof and existing stably at room temperature in the presence of oxygen and a rubber composition.
Claims8
A rubber composition comprising 100 parts by weight of at least one starting diene rubber, at least 10 parts by weight of at least one reinforcing agent and at least 0.01 part by weight but less than 0.1 part by weight of a radical containing compound having at least one radical selected from the group consisting of a nitroxide radical, hydrazyl radical, allyloxyl radical, and trytyl radical, also having at least one isocyanate group and existing stably at room temperature in the presence of oxygen.
A rubber composition comprising 100 parts by weight of at least one starting Sn coupling diene rubber and 0.01 to 1 part by weight of at least one compound selected from the group consisting of those having a nitroxide radical, hydrazyl radical, allyloxyl radical, trytyl radical, and analogous compounds having in the molecules thereof, also having at least one substituent selected from the group consisting of an isocyanate group, amino group, hydroxyl group, carboxyl group, oxirane group, thiirane group, ester group and amide group and existing stably at room temperature in the presence of oxygen.
A rubber composition comprising 100 parts by weight of at least one starting Sn coupling diene rubber and 0.01 to 1 part by weight of at least one radical-containing compound selected from the group consisting of those having a nitroxide radical, hydrazyl radical, allyloxyl radical, trytyl radical and having in the molecules thereof, also having at least one substituent selected from the group consisting of an isocyanate group and/or amino group, an analogus or compound and existing stably at room temperature in the presence of oxygen.
Dependencies are inferred from the claim text.