Modified butadiene rubber, preparation method thereof and rubber product
The invention relates to modified butadiene rubber, a preparation method thereof and a rubber product, and the preparation method comprises the following steps: placing butadiene in a solvent, carrying out a first polymerization reaction under the action of a rare earth catalyst and/or a nickel cata...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to modified butadiene rubber, a preparation method thereof and a rubber product, and the preparation method comprises the following steps: placing butadiene in a solvent, carrying out a first polymerization reaction under the action of a rare earth catalyst and/or a nickel catalyst, and adding a terminating agent to carry out a termination reaction when the conversion rate of butadiene is 70-80% to obtain a pre-polymerization solution, the solubility of the terminator in the solvent at 20 DEG C is greater than or equal to 20 g, the rare earth catalyst and the nickel catalyst both comprise aluminum alkyl, and the molar ratio of the terminator to the aluminum alkyl is 0.5: 1-1.2: 1; an iron-based catalyst is added into the pre-polymerization liquid for a second polymerization reaction, modified butadiene rubber is obtained, and the molar ratio of the iron element in the iron-based catalyst to butadiene is 1: 20000-1: 30000. The modified butadiene rubber with excellent durability, aging res |
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