Method for producing anionic polymer
AssigneeKuraray Co., Ltd.
InventorsYasuhiro Hatanaka, Tomoaki Tsuji, Syuichi Sunaga
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Abstract
Provided is a method for producing an anionic polymer in an industrially advantageous manner, whereby at the time of anionically polymerizing monomers using a solvent whose boiling point at atmospheric pressure is higher than the polymerization temperature, temperature control can be achieved by quickly removing the heat of the polymerization reaction using a simple device. The method for producing an anionic polymer includes anionically polymerizing a conjugated diene, an aromatic vinyl compound, or a mixture thereof under a condition where the amount of an inert gas present with respect to 1 kg of a solvent whose boiling point at atmospheric pressure is higher than the polymerization temperature is 20 mmol or less.
Claims12
A method for producing an anionic polymer, the method comprising:
- decompressing a reaction system comprising a solvent and an inert gas, such that the inert gas is discharged from the reaction system;
- and then
- anionically polymerizing a conjugated diene, or the conjugated diene and an aromatic vinyl compound, in the reaction system at a polymerization temperature and under an atmospheric pressure or below, such that an amount of the inert gas present with respect to 1 kg of the solvent is 20 mmol or less,
- wherein a boiling point of the solvent at atmospheric pressure is higher than the polymerization temperature.
Dependencies are inferred from the claim text.